TW201314041A - Linear compressor - Google Patents

Abstract

The present invention refers to a linear compressor based on resonant oscillating mechanism, which comprises an oscillating arrangement essentially formed by at least one linear motor (2) defined by a movable portion (22) and a fixed portion (21), at least a resonance spring (3), at least one piston (4) and at least one balancing body (5), wherein the movable portion (22) of the linear motor (2) is cooperatively associated with the piston (4), defining a piston - motor assembly. The piston - motor assembly is operatively associated to the end (31) of the resonant spring (3) and at least one balancing body (5) is functionally associated with the end (32) of the resonant spring (3). This construction allows the attenuation of the vibration that the resonant oscillating mechanism applies to the compressor housing through the cancellation of the forces generated by the motor and the forces generated by the compression of gas in the cylinder.

Description

Linear compressor

The present invention is directed to a linear compressor based on a resonant oscillating mechanism, and in particular based on a resonant spring mass system (for oscillating movement of components thereof). The linear compressor of the problem provides a resonant oscillation configuration that causes the attenuation of the vibrations imposed on the casing outside of it.

In short, the line compressor consists of a piston that is coupled to a one-line motor that causes the introduction and compression of the working fluid. The linear motor causes a forced linear oscillatory motion to the piston which causes compression of the fluid. A compressor utilizing a one-line type motor on its drive has the advantage of occupying a substantially small volume as compared to a conventionally driven rotary motor driven compressor.

The use of a compact compressor is considered to be preferred, and various solutions arise because the volume occupied by one of the compressors driven by the one-line motor is significantly smaller than the volume occupied by one of the compressors driven by a rotary engine. In order to improve the performance of a compressor driven by a linear motor (so-called linear compressor).

Based on the solution of this defect, a linear compressor having components focusing on minimizing the force required to perform the linear motor in each cycle began to emerge. One of these solutions is attributed to the use of one of the energy principles of the preservation system (using the alternative movement of the linear motor and extending it by one of the inertial aids of the system by the force of the linear motor) ). Use resonance phenomenon.

Resonance system must be at some frequency (called natural frequency or resonant frequency) Rate) The trend (or facility) with large amplitude oscillations.

Once a force is applied at a frequency close to one of the natural frequencies of a body, one of the mechanical energy gradually accumulates, resulting in an increase in the amplitude of the oscillation of the system.

Thus, a solution comprising a one-line type motor, which is mounted under a support comprising a spring, has the function of accumulating energy delivered by the engine. In addition to the accumulation of energy, these springs have the function of transporting the motor to the piston. These springs are often referred to as resonant springs.

Due to the fact that most of the energy required to move the piston has been stored in the spring resonance, the use of the resonant spring helps the linear motor work and reduces the force required to move the set, resulting in lower power consumption of the linear motor driving the system. .

A first example of a linear compressor having a resonant spring is described in the document US 2006/005700, which discloses a one-line type compressor having one of the resonant springs associated with the piston, which in turn The movable iron core of the one-line type motor is associated. The assembly of resonant springs is comprised of two pairs of springs, each pair being disposed in one side of a plate associated with the piston. Therefore, when the linear movement of the piston is performed in one direction, the pair of springs disposed in the respective faces of the plate act on the assembly, and move in the opposite direction when they reach a certain degree of opening. The assembly reduces the force required to operate the motor in an alternating manner. However, this embodiment has an inconvenience of using a large number of springs, which complicates the assembly of the assembly. Moreover, this embodiment prevents the compressor assembly from being minimized and prevents its use in small devices.

A second example of a linear compressor with a resonator spring is in the file No. PI 0601645-6, which discloses a minimized compressor comprising a single resonant spring associated with a linear motor and a piston, and is given a reciprocating motion by the linear motor. This embodiment, while making one of the linear compressors a more compact configuration possible, has the disadvantage of not providing any deviation in the position between the piston and the linear motor, since each component is placed in the One end of the resonant spring. Moreover, this structural configuration uses a single spring disposed along the full length of the compressor without any guiding elements, resulting in undesirable forces on the piston and the motor, which precludes proper operation of the pistons.

A third example of a linear compressor having a resonant spring is schematically illustrated in FIG. 1 by means of a resonant linear compressor CL, which according to a state of the art technology, is mounted in a cylinder CM and is coupled to a resonant spring MR A piston P associated with a first end, the second end of the resonant spring MR being associated with a movable portion (moving magnet) PM of a linear motor. The resonant spring MR has a neutral portion PN associated with a casing C of the compressor by a fastening member MF. Therefore, it should be noted that the most advanced technology of the line compressor CL utilizes a piston P mounted on one of the first ends PE of the casing C; and a motor mounted on the second end SE of one of the casings C, that is, Each component is in one of the ends of the compressor. These components are interposed by the resonant spring MR, however, this motor and piston arrangement is not advantageous due to the vibrations obtained in the compressor casing, because of the forces generated by the engine and by the cylinders The forces generated by the compression of the gases are in phase (i.e., in the same direction), and thus adding them equals a large force on the casing.

Thus, it is noted that the current state of the art technology lacks a resonant compressor that includes a structurally simplified configuration that can be minimized and that has components that reduce the vibration of the casing.

One of the objects of the present invention is to provide a linear compressor based on a resonant oscillation mechanism capable of attenuating vibration of a skeleton to which the resonant oscillation mechanism is applied. In this sense, it is therefore another object of the present invention to provide a linear compressor in which the resonant oscillation configuration can promote the force generated by the motor and the cancellation of the force generated by the compression of the gas in the cylinder (even partially ).

Another object of the present invention is to provide a linear compressor based on a resonant oscillation mechanism in which the resonant oscillation configuration reduces the amplitude of the resultant force (movement) imposed on the casing thereof.

The object of the present invention is fully achieved by a linear compressor as shown herein, the linear compressor comprising an oscillating arrangement essentially comprising at least one linear motor (defined by a movable portion and a fixed portion), at least a resonant spring and at least one piston. The oscillating arrangement further includes at least one balancing body.

In accordance with the teachings of the present invention, the movable portion of the linear motor is cooperatively associated with the piston system defining a piston-drive assembly.

In this sense, the piston-motor is functionally associated with one of the ends of the resonant spring while at least one balance body is functionally associated with the opposite end of the resonant spring.

Therefore, the balanced body mentioned can exercise an oscillating movement, which is shifted The motion may be synchronized with the resonant oscillatory motion of the motor piston assembly or in synchronism with the resonant oscillatory motion of the piston-motor assembly.

The invention will be described in detail based on the drawings listed below.

According to a main concept of the present invention, there is shown a linear compressor based on a resonant oscillating mechanism (driven by a linear motor and transmitted through a resonant spring that assists in the operation of an increased oscillation amplitude), wherein The resonant configuration itself is capable of minimizing unbalanced forces from gas compression in the cylinder and oscillating operation of the motor. By virtue of this, the vibration applied to the casing of the linear compressor is attenuated by the resonance configuration.

2 shows a schematic (cross-sectional) view of a preferred configuration of the line type compressor 1, which is designed in accordance with the concepts and purposes of the present invention.

Therefore, a preferred structure of the linear compressor 1 including an oscillating configuration essentially includes a linear motor 2, a resonant spring 3, a piston 4, and a balance body 5. Significantly, the line compressor 1 also includes a cylinder 6 and other components conventionally present in the compressor (e.g., such as a head assembly 7 and connection 8 for suction and discharge of working fluid). Preferably, the linear compressor 1 is also integrated by a casing 9 having a function of accommodating all the components forming the mentioned linear compressor 1.

The linear motor 2 generally includes a fixed portion 21 (stator or back iron) and a movable portion 22 (cursor/magnet). Therefore, the linear motor 2 is a conventional linear motor.

According to the invention, the fixed portion 21 of the linear motor 2 is fixed to the housing 9 of the linear compressor or is also fixed to the frame of the linear compressor 1. Any intermediary component of 9 (not shown). Since the movable portion 22 of the linear motor 2 is cooperatively associated with the piston 4, a piston-motor assembly is defined.

The resonant spring 3 includes a solid elastomeric body that is capable of undergoing physical "deformation" when subjected to an external force and capable of returning to its original "morphology" when detached from external forces.

Preferably, the resonant spring 3 defines a substantially helical tubular metal body defining one of the two distal ends 31 and 32. The resonant spring 3 further includes a neutral point 33 (where the vibration or deformation is much smaller than the ends 31 and 32) disposed in the middle of its length. This neutral point 33 allows the resonant spring 3 to be attached to the housing 9 of the line compressor 1 or to any intervening elements (not shown) of the casing 9 of the line compressor 1.

The piston 4 is a conventional piston used in an in-line type compressor, that is, it includes a piston defined by an essentially cylindrical body having an open end and a closed end (working end).

The balance body 5 is composed of a body having a specific mass, as summarized by its nomenclature. Preferably, the balancing body 5 has a mass similar to the mass of the piston-motor assembly.

The cylinder 6, head 7 and the connections 8 (for suction and discharge of working fluids) include conventional components that are already known to those skilled in the art and are known to those skilled in the art.

The casing 9 provided to the neutral point 33 of the resonant spring 3 (or to the attachment member 91 disposed between any of the resonant springs 3 and the casing 9) also includes the present One of the most advanced technologies known as the case.

According to the main concept of the invention, the oscillation configuration is in particular from the same class Other oscillating configurations of the type are detached and belong 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.

In this sense, the movement of the movable portion 22 of the linear motor 2 is integrated and transmitted directly to the piston, thereby moving the piston-motor assembly and, as a result, moving the end 31 of the resonant spring 3. This movement is transmitted to the end 32 of the resonant spring 3 and results to the balancing body 5.

Thus, each component of the oscillating configuration described herein has its particular function, namely: a piston-motor assembly (defined by the cooperative association between the movable portion 22 of the linear motor 2 and the piston 4) To impose a movement on the resonant spring 3 and impose a function of effectively compressing the working fluid.

The resonant spring 3 has a function of amplifying the oscillation movement by accumulating mechanical energy.

The balancing body 5 has the task of balancing the system such that the force generated by the piston-motor assembly (at the time of compression of the working fluid) is abolished (by the force generated by the balancing body itself).

Thus, the primary object of the present invention has been successfully achieved (by abolishing (and even partially) the force generated by the motor and the force generated by the compression of the gas in the cylinder to attenuate the resonant oscillator mechanism requiring vibration of the compressor casing ).

Also worth mentioning is that the piston-motor assembly, the balance body 5 performs an axial, linear and oscillating shift inside the casing 9 of the linear compressor 1. move. This movement may be synchronous or synchronously opposite to the resonant oscillatory movement of the piston-motor assembly.

Having described an example of a preferred embodiment of the invention, it is to be understood that the scope of the invention includes other possible variations of the invention, which are limited by the wording of the scope of the patent application, and include equivalent components.

1‧‧‧Line compressor

2‧‧‧Line motor

3‧‧‧Resonance spring

4‧‧‧Piston

5‧‧‧ Balanced ontology

6‧‧‧ cylinder

7‧‧‧ head/head assembly

8‧‧‧Connect

9‧‧‧Chassis/Shell/Frame

21‧‧‧Fixed part

22‧‧‧ movable part

31‧‧‧ distal end/end

32‧‧‧ distal end/end

33‧‧‧Neutral point

91‧‧‧ Attachment components

C‧‧‧Case

CL‧‧‧Line compressor

CM‧‧ ‧ cylinder

MF‧‧‧ fastening components

MR‧‧‧Resonance spring

P‧‧‧Piston

PE‧‧‧ first end

PM‧‧‧ movable part

PN‧‧‧Neutral part

SE‧‧‧ second end

Figure 1 illustrates a schematic diagram of an assembly of a resonant line compressor of the state of the art.

Figure 2 is a schematic view showing the assembly of the resonant line type compressor of the subject matter of the present invention.

1‧‧‧Line compressor

2‧‧‧Line motor

3‧‧‧Resonance spring

4‧‧‧Piston

5‧‧‧ Balanced ontology

6‧‧‧ cylinder

7‧‧‧ head/head assembly

8‧‧‧Connect

9‧‧‧Chassis/Shell/Frame

21‧‧‧Fixed part

22‧‧‧ movable part

31‧‧‧ distal end/end

32‧‧‧ distal end/end

33‧‧‧Neutral point

91‧‧‧ Attachment components

Claims (4)

A linear compressor comprising an oscillating arrangement substantially consisting of at least one linear motor (2), at least one resonant spring (3) defined by a movable portion (22) and a fixed portion (21) And at least one piston (4), in particular, the compressor is characterized in that the oscillating arrangement comprises at least one balancing body (5); the movable part (22) of the linear motor (2) and the piston (4) Cooperatingly associated, defining a piston-motor assembly; the piston-motor assembly being functionally associated with the end (31) of the resonant spring (3); and at least one balancing body (5) The end (32) of the resonant spring (3) is functionally associated. The linear compressor of claim 1, wherein the balance body (5) is capable of having an oscillating movement. A linear compressor according to claim 2, wherein the balance body (5) is capable of performing one resonance oscillation movement in synchronization with the resonance oscillation movement of the piston-motor assembly. The linear compressor of claim 2, wherein the balance body (5) is capable of performing one of the resonant oscillation movements in synchronization with the resonant oscillation movement of the piston-motor assembly.