CN112746941A - Miniature moving-magnetic type series two-stage linear compressor - Google Patents
Miniature moving-magnetic type series two-stage linear compressor Download PDFInfo
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- CN112746941A CN112746941A CN202110089274.2A CN202110089274A CN112746941A CN 112746941 A CN112746941 A CN 112746941A CN 202110089274 A CN202110089274 A CN 202110089274A CN 112746941 A CN112746941 A CN 112746941A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
The invention relates to a miniature moving-magnetic type series two-stage linear compressor, which comprises a low-pressure stage compressor, a middle external member and a high-pressure stage compressor, wherein the low-pressure stage compressor is connected with the middle external member through a pipeline; the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely, have the same structure and comprise a shell, an integral frame, a linear motor and a rotor part. The middle external member is provided with an air inlet, saturated refrigerant steam from the middle cooler enters the cavity of the middle external member from the air inlet, is mixed with refrigerant gas compressed and discharged by the low-pressure stage compressor, and then enters the air suction cavity of the high-pressure stage compressor through the circular air suction hole in the integral frame of the high-pressure stage compressor. When the piston of the high-pressure stage compressor moves towards the compression cavity side, the refrigerant gas is compressed, and double-stage compression is realized. The invention adopts the low-pressure stage linear compressor and the high-pressure stage linear compressor to operate in series, thereby improving the pressure ratio and the efficiency, reducing the exhaust temperature and reducing the vibration and the noise of the compressors.
Description
Technical Field
The invention relates to a compressor, in particular to a miniature moving-magnetic type series two-stage linear compressor.
Background
The compression refrigeration cycle is one of the main modes of refrigeration, and has wide application in refrigerators and air conditioning systems, so that a compressor is compared with a heart of an air conditioning system. The air conditioner compressor consumes a large amount of electric power when operating. Compared with the traditional reciprocating piston compressor, the linear compressor has the characteristics of compact structure, small volume, low energy consumption, high efficiency and the like, and is gradually applied to civil refrigeration equipment such as refrigerators, air conditioners and the like from the military fields such as aerospace and the like. After 90 s in the 20 th century, the linear compressor for the household refrigerator was developed abroad, Sunpower in the united states has a technology for developing the linear compressor for the stirling refrigerator, LGE in korea has a technical advantage for manufacturing the household refrigerator, and two companies have been cooperative in developing the linear compressor for the household refrigerator. In 2003, the LGE is commercialized for the first time for a linear compressor, R600a is adopted as a working medium in a DIOS refrigerator, and the compressor adopts a moving magnet type structure. In 2006, LGE introduced the development of second generation linear compressors to the market. In 2009, LGE possessed over 700 linear compressor patents, including korea and internationally.
For a common return-air cooling type single-stage compressor, if the system working medium is R22, when the condensation temperature is 54.4 ℃ and the evaporation temperature is-40 ℃, the compression ratio is 21. If the compressor return air temperature is 20 c, the theoretical discharge temperature would be as high as 193 c. Such high discharge temperatures directly threaten the proper operation of the compressor moving parts and the motor life. The double-stage compressor solves the problems of overlarge compression ratio, overhigh exhaust temperature and the like of the compressor during low-temperature refrigeration.
The moving magnet linear compressor is mainly a reciprocating piston compressor driven by a moving magnet linear oscillating motor. The stator of the oscillating motor is composed of an inner yoke and an outer yoke, the end of the excitation coil forms a magnetic pole, and the rotor is composed of a permanent magnet and is connected with a piston and a spring through a support piece. The work magnetic field of the oscillating motor consists of two parts, wherein one part is an alternating magnetic field generated by an excitation coil, the other part is a constant magnetic field generated by a permanent magnet, and under the interaction of the two magnetic fields, an axial electromagnetic driving force is generated to further push a piston in a cylinder to do reciprocating linear motion.
Disclosure of Invention
In order to solve the problems of overlarge compression ratio, overhigh exhaust temperature and the like of the compressor, reduce energy consumption and improve the efficiency of the compressor, the invention provides a miniature moving-magnet type series two-stage linear compressor. The high-pressure stage compressor and the low-pressure stage compressor both adopt moving-magnet linear motors, and have the advantages of compact structure, small volume, oil-free lubrication and high efficiency. Refrigerant enters a suction cavity of the low-pressure stage compressor through a suction port on a shell of the low-pressure stage compressor, enters a compression cavity of the low-pressure stage compressor through a suction channel and a suction valve plate on a piston, and the piston oscillates in a reciprocating manner to compress refrigerant gas and is discharged through a discharge valve. And heat exchange is carried out between the intermediate external member and the environment, so that the temperature is reduced. The refrigerant enters a suction cavity of the high-pressure stage compressor through a suction port on the integral frame of the high-pressure stage compressor, then enters a compression cavity of the high-pressure stage compressor through a suction channel of a high-pressure stage compression piston and a suction valve plate, and is discharged through a discharge valve of the high-pressure stage compressor and a discharge port of a middle sleeve piece through a discharge pipe of the high-pressure stage compressor after being compressed. Because the high-pressure compressor and the low-pressure compressor are made of metal materials, the refrigerant can exchange heat with the environment through the shell, and the exhaust temperature of the compressor is further reduced. The high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely, so that vibration is greatly reduced.
The invention provides a miniature moving-magnetic type series two-stage linear compressor, which comprises a low-pressure stage compressor, a middle external member and a high-pressure stage compressor, wherein the low-pressure stage compressor is connected with the middle external member through a pipeline; the low-pressure stage compressor comprises a shell, an integral frame, a rotor part and a linear motor. The low-pressure stage compressor is made of aluminum, and the shell is provided with a suction port and a power supply interface. The low-pressure stage compressor integral frame is made of aluminum, and the low-pressure stage compressor shell, the integral frame and the middle sleeve piece are fixedly sealed through M6 screws. An exhaust port is formed in the integral frame of the low-pressure stage compressor, and an exhaust valve plate and the lift limiter are fixed on the integral frame through M2.5 screws. The linear motor part of the low-pressure stage compressor comprises outer yoke iron, inner yoke iron, a coil and a coil framework, wherein the inner yoke iron and the outer yoke iron are made of electrician pure iron, the inner yoke iron is fixed on the whole rack through gluing, the coil framework is sleeved on the outer side of the coil, and the outer yoke iron is embedded on the coil framework. The rotor part of the low-pressure stage compressor comprises a plate spring, a piston, a connecting piece, a permanent magnet and a permanent magnet bracket. The piston and the permanent magnet support are fixed through the connecting piece, and coaxiality is guaranteed. The permanent magnet is glued on the permanent magnet bracket, the plate spring assembly is fixed on the integral frame by using an M3 screw, and the connecting piece and the plate spring assembly are fixed by using an M8 nut. Due to the radial rigidity of the plate spring, the coaxiality of the piston and the piston wall is ensured, and the friction is reduced. An air suction channel is arranged between the piston and the connecting piece, and an air suction valve plate is arranged at the top end of the piston. The middle sleeve is made of aluminum, and is provided with an exhaust port which is connected with an exhaust pipeline and used for discharging refrigerant gas compressed by the high-pressure stage compressor. As described in example 2 below, an inlet port is added to the intermediate assembly through which saturated refrigerant vapor from the intercooler enters the cavity of the intermediate assembly to mix with refrigerant gas discharged from the low pressure stage compressor. The high-pressure stage compressor linear motor and the rotor part have the same structure as the low-pressure stage compressor linear motor and the rotor part, and the difference is that a suction port is not required to be arranged on a shell of the high-pressure stage compressor, and only one power supply interface is required to be arranged. A sealing gasket and an end cover are required to be added at an exhaust port on the integral frame of the high-pressure stage compressor, the sealing gasket and the end cover are fixed on the integral frame of the high-pressure stage compressor by using M3 screws, and the end cover is connected with an exhaust pipe. The whole frame of the high-pressure stage compressor is provided with circular air suction ports, the circular air suction ports are arranged in an annular mode, and the number of the circular air suction ports is 4-6. Refrigerant gas compressed by the low-pressure stage compressor is discharged into the cavity of the middle sleeve piece and then enters the suction cavity of the high-pressure stage compressor through a circular suction port on the integral rack of the high-pressure stage compressor.
In the micro moving-magnet type series two-stage linear compressor provided by the invention, the plate spring materials used by the high-pressure stage compressor and the low-pressure stage compressor are silicon-manganese spring steel, the thickness is 1mm, the width of a vortex groove is 1.5mm, the molded line is an Archimedes vortex line, and the number of arms is 2. The number of the required plate spring pieces is determined according to the stiffness of the single plate spring, and is generally 4-5. And a plate spring gasket is arranged between every two plate springs, and the gap of the plate spring gasket corresponds to the molded line end of the plate spring.
In addition, the micro moving-magnet type tandem two-stage linear compressor provided by the invention can also have the following characteristics: the bottom of the permanent magnet support is provided with the trapezoidal positioning groove, when the piston, the connecting piece and the permanent magnet support are fixed, the coaxiality of the piston, the connecting piece and the permanent magnet support is ensured, the friction between the piston and the piston wall, between the inner yoke iron and the permanent magnet and between the outer yoke iron and the permanent magnet support is reduced, and the operation efficiency is improved.
In addition, the micro moving-magnet type tandem two-stage linear compressor provided by the invention can also have the following characteristics: the high-pressure stage compressor and the low-pressure stage compressor use the same power supply and are connected from power interfaces on the shell bodies of the high-pressure stage compressor and the low-pressure stage compressor, so that the reciprocating vibration of the pistons of the high-pressure stage compressor and the low-pressure stage compressor is ensured to be the same.
In addition, the micro moving-magnet type tandem two-stage linear compressor provided by the invention can also have the following characteristics: the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely and fixed on two sides of the middle sleeve piece by M6 screws, so that vibration during movement is counteracted.
In addition, the micro moving-magnet type tandem two-stage linear compressor provided by the invention can also have the following characteristics: the refrigerant gas compressed by the low-pressure stage compressor exchanges heat with the environment through the wall surface in the cavity of the middle kit and the cavity of the shell of the high-pressure stage compressor, so that the suction temperature of the high-pressure stage compressor is reduced, and the exhaust temperature of the high-pressure stage compressor is also reduced.
The invention has the following functions and effects:
according to the micro moving-magnet type series two-stage linear compressor, the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely, so that the axial force can be maximally balanced, the vibration is greatly reduced, and the reliability is improved.
Furthermore, the high-pressure stage compressor and the low-pressure stage compressor use the same power supply, so that the reciprocating vibration of the high-pressure stage compressor and the reciprocating vibration of the low-pressure stage compressor are the same, the vibration caused by the movement of the piston is greatly reduced, and the reliability is enhanced.
Furthermore, the refrigerant gas compressed by the low-pressure stage compressor exchanges heat with the environment through the wall surface in the middle sleeve cavity and the high-pressure stage compressor shell cavity, so that the suction temperature of the high-pressure stage compressor is reduced, the exhaust temperature of the high-pressure stage compressor is also reduced, and a larger pressure ratio can be obtained.
Furthermore, saturated refrigerant vapor from the intercooler enters the cavity of the intermediate external member through the air inlet of the intermediate external member, and is mixed with refrigerant gas exhausted after being compressed by the low-pressure stage compressor, so that the suction temperature of the high-pressure stage compressor is reduced, and the method is an effective method for reducing the exhaust temperature of the compressor.
Furthermore, the miniature moving-magnet type series two-stage compressor is used for compressing the refrigerant in the small refrigeration system, and compared with the compressor with the traditional piston type structure, the compressor has the advantages of compact structure, high efficiency and easiness in realizing oil-free lubrication due to the adoption of the moving-magnet type linear motor.
Drawings
FIG. 1 is a schematic view of the structural assembly of a micro moving-magnet type tandem two-stage linear compressor used in the present invention;
FIG. 2 is an external view of a micro moving-magnet type tandem two-stage linear compressor used in the present invention;
FIG. 3 is a cross-sectional view of the structure of a micro moving-magnet type tandem two-stage linear compressor used in the present invention;
fig. 4 is a structural sectional view of a micro moving-magnet type series two-stage linear compressor in embodiment 1 of the present invention;
fig. 5 is a structural sectional view of a micro moving-magnet type tandem two-stage linear compressor in embodiment 2 of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiment is used to specifically describe the micro moving-magnetic type series two-stage linear compressor of the invention with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, a micro moving-magnet type tandem two-stage linear compressor includes a low-pressure stage compressor, a middle sleeve 201, and a high-pressure stage compressor, where the high-pressure stage compressor and the low-pressure stage compressor both include a casing, an integral frame, a mover portion, and a linear motor.
The low-pressure stage compressor housing 101 has disposed thereon a power interface 122 and a suction port 104.
The low-pressure stage compressor integral frame 102 is provided with an exhaust hole, and is provided with a tongue-shaped reed exhaust valve 121 and a lift limiter 120, the exhaust valve 121 and the lift limiter 120 are fixed on the integral frame 102 through M2.5 screws, and the inner yoke 116 is glued on the integral frame.
The low-pressure stage compressor mover part includes plate springs 108, small washers 109, plate spring washers 110, a coupling member 105, a piston 111, a permanent magnet supporter 112, a permanent magnet 117, a fastening nut 107, a screw 118, and a suction valve 119.
The low-pressure stage compressor linear motor includes an outer yoke 113, an outer yoke pressing plate 103, an inner yoke 116, a coil 114, and a bobbin 115.
An exhaust port 202 is disposed on the intermediate sleeve 201, and the intermediate sleeve exhaust port 202 and the high-pressure stage compressor exhaust port 304 are connected by an exhaust pipe 322.
A power interface 323 is disposed on the high-pressure stage compressor housing 301.
The high-pressure stage compressor integral frame 302 is provided with an exhaust hole, and is provided with a tongue-shaped reed exhaust valve plate 321 and a lift limiter 320, the exhaust valve plate 321 and the lift limiter 320 are fixed on the high-pressure stage compressor integral frame 302 through screws, the exhaust hole is sealed by an exhaust end cover, the exhaust end cover is connected with an exhaust pipe 322, and an inner yoke iron 316 is glued on the integral frame.
The high-pressure stage compressor mover section comprises plate springs 308, small washers 309, plate spring washers 310, connectors 305, pistons 311, permanent magnet holders 312, permanent magnets 317, fastening nuts 307, screws 318, and suction valves 319.
The high-pressure stage compressor linear motor comprises an outer yoke iron 313, an outer yoke iron pressing plate 303, an inner yoke iron 316, a coil 314 and a coil frame 315.
The high-pressure compressor and the low-pressure compressor are arranged in an opposite mode, threaded holes are formed in the peripheries of the shells of the high-pressure compressor and the low-pressure compressor and the periphery of the whole machine frame, and the shells, the whole machine frame and the middle sleeve member 201 are fixed together through screws to play a role in fixing and sealing. Because the high-pressure stage compressor and the low-pressure stage compressor are oppositely arranged, the axial force is greatly balanced, and the vibration is reduced.
The low pressure stage compressor suction port 104, the discharge port 202 on the intermediate sleeve, and the discharge port 304 of the high pressure stage compressor all need to be tightly sealed with a sealing gasket and end cap.
The plate springs and the plate spring gaskets are fixed on the integral rack through screws, and one plate spring gasket and one small gasket are placed between every two plate springs.
The high-pressure stage compressor and the low-pressure stage compressor are connected with the same power supply, the excitation coils of the high-pressure stage compressor and the low-pressure stage compressor are electrified to generate an alternating magnetic field, the alternating magnetic field interacts with a constant magnetic field generated by the permanent magnet to generate axial electromagnetic driving force, and then the piston is pushed to do reciprocating linear motion. Because the high-pressure stage compressor and the low-pressure stage compressor are connected with the same power supply, the pistons move in the same direction, and the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely, vibration in the moving process can be offset, and the service life of the compressors is prolonged.
The area in the low-pressure compressor shell 101 is a suction cavity of the low-pressure compressor, the area in the middle kit 201 and the area in the high-pressure compressor shell 301 form a suction cavity of the high-pressure compressor, and the suction cavity is also a gas reservoir for storing refrigerant gas compressed by the low-pressure compressor.
A working process of a micro moving-magnet type series two-stage linear compressor is shown in figure 4, refrigerant gas enters a suction cavity of the low-pressure stage compressor from a suction port 104 on a shell 101 of the low-pressure stage compressor, a piston 111 of the low-pressure stage compressor makes reciprocating linear motion, when pressure in the compression cavity of the low-pressure stage compressor is smaller than that of the suction cavity of the low-pressure stage compressor, a suction valve 119 at the top of the piston 111 is opened, the refrigerant gas enters the compression cavity of the low-pressure stage compressor through a suction channel inside a connecting piece 105 and the piston 111, and the piston 111 moves rightwards to compress the refrigerant gas. When the pressure in the compression cavity of the low-pressure stage compressor is higher than the pressure in the cavity of the middle sleeve 201, the reed exhaust valve 121 on the whole frame 102 of the low-pressure stage compressor is opened, the refrigerant gas compressed by the low-pressure stage compressor enters the cavity of the middle sleeve 201 and then enters the suction cavity of the high-pressure stage compressor through the circular suction hole 324 on the whole frame of the high-pressure stage compressor. When the pressure in the compression cavity of the high-pressure stage compressor is smaller than the pressure of the suction cavity, the refrigerant gas enters the compression cavity through the suction channel in the connecting piece 305 and the piston 311 of the high-pressure stage compressor, the piston 311 of the high-pressure stage compressor moves leftwards, the refrigerant gas is compressed, and double-stage compression is realized. When the pressure in the compression cavity of the high-pressure stage compressor is higher than the pressure in the exhaust cavity, the exhaust valve plate 321 is opened, and the refrigerant gas in the compression cavity of the high-pressure stage compressor enters the exhaust cavity and is exhausted through the exhaust pipe 322 connecting the exhaust port of the high-pressure stage compressor and the exhaust port 202 of the middle sleeve. The high-low pressure stage double-stage compressor connected in series increases the pressure ratio, improves the refrigerating capacity and has higher efficiency.
Refrigerant gas exchanges heat with the environment through the high-pressure-stage compressor, the low-pressure-stage compressor shell and the middle sleeve 201, the heat exchange area is large, the heat exchange effect is good, the suction temperature of the high-pressure-stage compressor is reduced, and the problem caused by overhigh exhaust temperature of the high-pressure-stage compressor is solved.
The bottom of the permanent magnet support of the high-pressure stage compressor and the bottom of the permanent magnet support of the low-pressure stage compressor are provided with the trapezoidal positioning grooves, when the piston, the connecting piece and the permanent magnet support are fixed, the coaxiality of the piston, the connecting piece and the permanent magnet support is ensured, the friction between the piston and the piston wall, between the inner yoke iron and the permanent magnet and between the outer yoke iron and the permanent magnet support is reduced, and the operation efficiency is improved.
Example 2:
as shown in fig. 5, the structures of the high-pressure stage compressor and the low-pressure stage compressor in embodiment 2 are the same as the structure of the compressor in embodiment 1, and the operation principle is also the same, except that:
the intermediate sleeve member 201 is provided with an air inlet 203, and saturated refrigerant vapor from the intermediate cooler enters the cavity of the intermediate sleeve member 201, is mixed with refrigerant gas compressed and discharged by the low-pressure stage compressor, and then enters the suction cavity of the high-pressure stage compressor through a circular suction hole 324 on the integral frame of the high-pressure stage compressor. When the pressure in the compression cavity of the high-pressure stage compressor is smaller than the pressure of the suction cavity, the refrigerant gas enters the compression cavity through the suction channel in the connecting piece 305 and the piston 311 of the high-pressure stage compressor, the piston 311 of the high-pressure stage compressor moves leftwards, the refrigerant gas is compressed, and double-stage compression is realized. When the pressure in the compression cavity of the high-pressure stage compressor is higher than the pressure in the exhaust cavity, the exhaust valve plate 321 is opened, and the refrigerant gas in the compression cavity of the high-pressure stage compressor enters the exhaust cavity and is exhausted through the exhaust pipe 322 connecting the exhaust port of the high-pressure stage compressor and the exhaust port 202 of the middle sleeve.
Action and effect of the examples:
according to the micro moving-magnetic type series two-stage linear compressor, due to the adoption of the moving-magnetic type linear compressor, oil-free lubrication can be realized, the structure is compact, and the efficiency is high.
Furthermore, the high-pressure stage compressor and the low-pressure stage compressor are connected in series to operate, so that the pressure ratio is improved, the refrigeration system can obtain lower temperature, the power consumption is reduced, and the efficiency is improved.
Furthermore, the refrigerant gas compressed by the low-pressure stage compressor exchanges heat with the environment through the wall surface in the cavity of the middle kit and the shell cavity of the high-pressure stage compressor, so that the suction temperature of the high-pressure stage compressor is reduced, and the exhaust temperature of the high-pressure stage compressor is also reduced.
Furthermore, saturated refrigerant steam from the intercooler is mixed with refrigerant gas discharged by the low-pressure stage compressor in the middle sleeve cavity, so that the suction temperature and the exhaust temperature of the high-pressure stage compressor are further reduced, and the influence caused by overhigh exhaust temperature of the compressor is avoided.
Furthermore, the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely, and the same power supply is input, so that the axial force can be maximally balanced, the vibration is greatly reduced, and the reliability is improved.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (6)
1. A miniature moving-magnet type series two-stage linear compressor is characterized by comprising:
having a low pressure stage compressor, an intermediate kit, and a high pressure stage compressor;
the low-pressure stage compressor and the high-pressure stage compressor both comprise a shell, an integral frame, a rotor part and a linear motor;
the intermediate external member is provided with an air inlet and an air outlet, saturated refrigerant steam from the intermediate cooler enters from the air inlet and is mixed with refrigerant gas discharged by the low-pressure stage compressor, and the air outlet is connected with an air outlet port of the high-pressure stage compressor through an air outlet pipeline;
the high-pressure stage compressor, the low-pressure stage compressor and the integral frame are fixed on the middle external member through screws;
the whole frame of the high-pressure stage compressor is provided with circular air suction ports which are distributed in an annular shape, the number of the circular air suction ports is 4-6, and refrigerant gas discharged by the low-pressure stage compressor enters an air suction cavity of the high-pressure stage compressor through the air suction ports.
2. The micro moving-magnet type series two-stage linear compressor according to claim 1, wherein:
the high-pressure stage compressor and the low-pressure stage compressor are respectively provided with a motor part which comprises a plate spring, a plate spring gasket, a connecting piece, a piston, a permanent magnet support, a permanent magnet, a fastening nut and an air suction valve, wherein the bottom of the permanent magnet support is provided with a trapezoidal positioning groove.
3. The micro moving-magnet type series two-stage linear compressor according to claim 1, wherein:
the high-pressure stage compressor and the low-pressure stage compressor are connected to the same power supply, and the piston vibration is the same.
4. The micro moving-magnet type series two-stage linear compressor according to claim 1, wherein:
the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely and fixed on the middle sleeve piece through screws.
5. The micro moving-magnet type series two-stage linear compressor according to claim 1, wherein:
and the air inlet and the air outlet of the middle sleeve, the air suction port of the low-pressure stage compressor and the air outlet of the high-pressure stage compressor are sealed by sealing gaskets and end covers.
6. The micro moving-magnet type series two-stage linear compressor according to claim 2, wherein:
and an air suction channel is arranged between the piston and the connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110089274.2A CN112746941A (en) | 2021-01-23 | 2021-01-23 | Miniature moving-magnetic type series two-stage linear compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110089274.2A CN112746941A (en) | 2021-01-23 | 2021-01-23 | Miniature moving-magnetic type series two-stage linear compressor |
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| Publication Number | Publication Date |
|---|---|
| CN112746941A true CN112746941A (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110089274.2A Pending CN112746941A (en) | 2021-01-23 | 2021-01-23 | Miniature moving-magnetic type series two-stage linear compressor |
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| Country | Link |
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| CN (1) | CN112746941A (en) |
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2021
- 2021-01-23 CN CN202110089274.2A patent/CN112746941A/en active Pending
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