Classifications

• • 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
  • F04B39/0044—Pulsation and noise damping means with vibration damping supports
• • 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
  • F04B35/045—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 using solenoids
• • 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
• • 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
• • 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
  • F04B39/0088—Pulsation and noise damping means using mechanical tuned resonators
• • 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
  • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
  • F04B53/001—Noise damping
  • F04B53/004—Noise damping by mechanical resonators

Definitions

• the present invention refers to a linear compressor based on resonant oscillating mechanism, in particular based on a resonant spring-mass system, for maintaining the oscillating movement of its components.
• the linear compressor in question provides a resonant oscillating arrangement responsible for attenuation of vibration imposed on their outer housing.
• linear compressors consist of a piston which is responsible for admission and compression of the working fluid, coupled to a linear motor.
• the linear motor is responsible for imposing the linear oscillatory motion to the piston, which is responsible for the compression of the fluid.
• Compressors that make use of a linear motor on their drive have the advantage of occupying a substantially small volume compared to the compressors driven by a conventional rotary motor.
• linear compressors began to emerge provided with means focused on minimizing the force that the linear motor needs to perform in each cycle.
• One of these solutions reside in the use of a physical principle to conserve energy of the system, using the alternative movement of the linear motor and extending it in such a way that the effort made by the linear motor is aided by the inertia of the system. The resonance phenomenon is used.
• the resonance is the tendency (or facility) that a body has to oscillate with large amplitudes at certain frequencies, called natural frequency or resonant frequency.
• solutions which comprise a linear motor mounted under supports comprising springs, which have the function of accumulating the energy delivered by the engine. In addition to the accumulation of energy, these springs have the function of transmitting the movement of the motor to the piston. These springs are commonly called as resonant springs.
• the use the resonant of springs helps linear motor to work and reduces the effort required to move the set, resulting in lower electricity consumption of the linear motor that drives the system, due to the fact that most part of the energy required to move the piston is already stored in the spring resonant.
• a first example of linear compressor provided with resonant springs is described in the document US 2006/005700, which discloses a linear compressor provided with an assembly of resonant springs, associated with the piston, which is in turn associated with the movable core of a linear motor.
• Said assembly of resonant springs consists of two pairs of springs, each pair disposed in a face of a plate associated with the piston.
• the pair of springs arranged in the respective face of the plate acts on the assembly and moves it in the opposite direction when they reach a certain level of openness, reducing the effort that the motor needs to operate in alternating manner.
• This embodiment has, however, the inconvenience of using a large amount of springs, which complicates the mounting of the assembly. Furthermore, this embodiment prevents the minimization of the compressor assembly, preventing its application in small devices.
• a second example of a linear compressor provided with resonator springs is described in document PI 0601645-6, which discloses a minimized compressor, comprising a single resonant spring associating a linear motor and a piston, and give it a reciprocating motion performed by the linear motor.
• This embodiment while enabling a more compact arrangement of the linear compressor, has the disadvantage of not providing the existence of any deviation in the position between the piston and the linear motor, since each component is disposed at one end of the resonant spring.
• a constructive arrangement to use a single spring arranged along the entire length of the compressor, without any guiding element, results in undesirable efforts of the piston and of the motor, which may preclude their correct functioning.
• FIG. 1 A third example of the linear compressors provided with resonant springs is illustrated schematically in Figure 1 with a resonant linear compressor CL, according to the state of the art, comprising a piston P mounted within a cylinder CM and associated with a first end of a resonant spring MR, which has its second end associated with a movable portion (moving magnet) PM of a linear motor.
• the resonant spring MR has a neutral portion PN associated to the housing C of the compressor by a fastening means MF.
• the linear compressor CL of the state of the art employs the piston P being mounted on a first end PE of the housing C, and the motor mounted on a second end SE of the housing C, that is, each component in one of the ends of the compressor.
• these components are intermediated by the resonant spring MR, however, this motor and piston arrangement is not favorable due to the resulting vibration in the compressor housing, since the forces generated by the engine and the forces generated by the compression of gas in the cylinder are in phase, that is, in the same direction, and therefore they are added, resulting in a greater force on the housing.
• the current state of the art lacks a resonant compressor comprising a constructive simplified arrangement which can be minimized and, moreover, provided with means to reduce vibration of the housing.
• the linear compressor shown herein which comprises an oscillating arrangement essentially comprising at least one linear motor (defined by a movable portion and a fixed portion), at least one resonant spring and at least one piston.
• the oscillating arrangement further comprises at least one balancing body.
• the movable portion of the linear motor is cooperatively associated with the piston defining a piston-drive assembly.
• the piston - motor is functionally associated to one of the ends of the resonant spring, while at least one balancing body is functionally associated with the opposite end of the resonant spring.
• the mentioned balancing body is capable of exerting an oscillatory movement, which can be synchronized to the resonant oscillatory motion of the motor piston assembly, or, synchronously opposite to the resonant oscillatory motion of the piston - motor assembly.
• Figure 1 illustrates a schematic view of the assembly of the resonant linear compressor belonging to the current state of the art.
• Figure 2 illustrates a schematic view of the assembly of the resonant linear compressor that is object of the present invention.
• a linear compressor based on resonant oscillating mechanism (driven by a linear motor and which makes use of a resonant spring to assist its operation through the accumulation of energy resulting in an increased oscillation amplitude), where the resonant arrangement itself is capable of minimizing the unbalanced forces from the gas compression in the cylinder and the oscillating operation of the motor.
• the vibration that the resonant arrangement applies to the housing of the linear compressor is attenuated.
• Figure 2 shows a schematic (cross-sectional) view of the preferred construction of the linear compressor 1 , which is designed in accordance with the concepts and objectives of the present invention.
• a linear compressor 1 comprising an oscillating arrangement essentially comprising a linear motor 2, a resonant spring 3, a piston 4, and a balancing body 5.
• the linear compressor 1 also comprises a cylinder 6 and other elements conventionally existing in compressors (for example, as a head assembly 7 and connections 8 for suction and discharge of the working fluid).
• the linear compressor 1 is also integrated by a housing 9 which has the function of accommodating all components that form the mentioned linear compressor 1.
• the linear motor 2 comprises, in general, a fixed portion 21 (stator or back iron) and a movable portion 22 (cursor / magnet).
• the linear motor 2 is, therefore, a conventional linear motor.
• the fixed portion 21 of the linear motor 2 is fixed to the casing 9 of the linear compressor, or any intermediate element (not shown) also fixed to the frame 9 of the linear compressor 1. Since the movable portion 22 of the linear motor 2 is cooperatively associated with the piston 4 defining a piston - motor assembly.
• the resonant spring 3 includes a physically resilient body, that is, capable of suffering physical "deformation” when subjected to an external force and capable of returning to its original “form” when free of external force.
• the resonant spring 3 is a substantially helical tubular metal body defining two distal ends 31 and 32.
• the resonant spring 3 further comprises a neutral point 33 (where vibrations or deformations are much smaller than the ends 31 and 32) arranged in the middle of its length. Said neutral point 33 allows the resonant spring 3 to be attached to the casing 9 of the linear compressor 1 , or any intermediate element (not shown) also attached to the housing 9 of the linear compressor 1.
• the piston 4 is one conventionally piston used in linear compressors, that is, it comprises a piston defined by an essentially cylindrical body with an open end and one closed end (working end).
• the balancing body 5 as induced by its nomenclature, consists of a body with a specific mass. Preferably, the balancing body 5 has a mass similar to the mass of the piston - motor assembly.
• the cylinder 6, the head 7 and the connections 8 for suction and discharge of working fluid comprise conventional components already belonging to the current state of the art, therefore, already known to those skilled versed in the art.
• the housing 9 which provides attachment means 91 to the neutral point 33 of the resonant spring 3 (or to any intermediate element disposed between said resonant spring 3 and the housing 9) also comprises a conventional housing already belonging to the current state of the art.
• the oscillating arrangement is especially detached from other oscillatory arrangements of the same type and belonging to the current state of the art due to the fact that the piston - motor assembly (defined by the cooperative association between the movable portion 22 of the linear motor 2 and the piston 4) is functionally associated with the end 31 of the resonant spring 3, while the balancing body 5 is functionally associated with the end 32 of the resonant spring 3.
• the piston - motor assembly defined by the cooperative association between the movable portion 22 of the linear motor 2 and the piston 4
• the balancing body 5 is functionally associated with the end 32 of the resonant spring 3.
• each component of the oscillating arrangement described herein has its particular function, namely:
• the piston - motor assembly (defined by the cooperative association between the movable portion 22 of the linear motor 2 and the piston 4) serves to impose movement on the resonant spring 3 and function of compressing, effectively, the working fluid.
• the resonant spring 3 has a function to amplify the oscillating movement, by accumulating mechanical energy.
• the balancing body 5 has the task of balancing the system, so that the forces generated by piston - motor assembly (at the time of compression of the working fluid) are annulled (by the forces generated by the movement of the balancing body itself).
• the main objective of the present invention attenuate the vibration that the resonant oscillating mechanism requires the compressor housing by canceling (even partially) the forces generated by the motor and the forces generated by compression of the gas in the cylinder) is successfully achieved.
• the balancing body 5 performs an axial, linear and oscillating movement inside the housing 9 of the linear compressor 1. This movement can be synchronized or synchronously opposite to the resonant oscillatory movement of said piston - motor assembly.

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Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (6)

Family Cites Families (6)

• 2011
  • 2011-07-21 BR BRPI1103314-2A patent/BRPI1103314A2/pt not_active IP Right Cessation
• 2012
  • 2012-07-19 EP EP12745764.6A patent/EP2734731A1/en not_active Withdrawn
  • 2012-07-19 CN CN201280041840.1A patent/CN103765010A/zh active Pending
  • 2012-07-19 WO PCT/BR2012/000245 patent/WO2013010237A1/en active Application Filing
  • 2012-07-19 KR KR1020147003852A patent/KR20140058561A/ko not_active Application Discontinuation
  • 2012-07-19 JP JP2014520467A patent/JP2014521007A/ja active Pending
  • 2012-07-19 US US14/234,036 patent/US20140234137A1/en not_active Abandoned
  • 2012-07-20 TW TW101126355A patent/TW201314041A/zh unknown
  • 2012-07-23 AR ARP120102670A patent/AR087289A1/es unknown

Patent Citations (6)

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