BR102012019474A2 - FLUID COMPRESSOR BASED ON SPIRAL MECHANISM - Google Patents

Abstract

SPIRAL MECHANISM-BASED FLUID COMPRESSOR The present invention relates to a fluid compressor based on a spiral mechanism whose indexing between the discharge chamber and the non-orbiting loop of the spiral mechanism is especially optimized. For this purpose, the discharge chamber (6) is hermetically fixed to the non-orbiting loop (4) through the interaction between the locking structure (61) and the locking projection (41), and through the seal defined between the contact edge. (62) of the discharge chamber (6) and the free of the non-orbiting loop (4).

Description

Inventive Patent Report for "SPIRAL MECHANISM-BASED FLUID COMPRESSOR".

Field of the Invention

The present invention relates to a spiral type mechanism-based fluid compressor and especially to the arrangement of the components comprising said spiral type mechanism-based fluid compressor. According to the present invention there is provided a novel form of indexing between the discharge chamber and the non-orbiting loop of the spiral mechanism and, more particularly, an indexing (between the discharge chamber and the non-orbiting loop) whose interaction with The hermetic shell of the compressor is especially optimized.

Background of the Invention

As the skilled artisan is aware, the current state of the art is integrated with a wide range of fluid compressor models and types.

Among the well-known types of fluid compressors, the following is noteworthy - according to the present invention - the spiral-type fluid-based compressor, which is a device fundamentally integrated by an electric motor and a compression mechanism. both being arranged within an airtight carcass.

According to US patent document 801182 published in 1905, said spiral-like compression mechanism comprises a functional assembly comprised of two similar structures (circular plates provided with a fundamentally spiral contoured perpendicular wall) inversely coupled (where the top of a fundamentally spiral contoured perpendicular wall of one circular plate is turned to the base of the other circular plate, the true reciprocal being through a coupling means. In addition, one of these structures is still cooperatively associated with the electric motor. Conventionally, the structure capable of being associated with the electric motor is called an “orbiting loop”, while the other structure is called a “fixed loop” or “non-orbiting loop”.

Also according to this document, the coupling means used between the "orbiting loop" and the "fixed loop" comprises an element capable of imposing on the orbiting loop orbital motion from the movement of the electric motor, ie this means of The coupling generally comprises a component which, regardless of the type of "in" movement, generates orbital motion at the "orbiting loop". Therefore, and according to this concept, the orbital movement of the “orbiting loop” in relation to the “fixed loop” eventually enables the perpendicular spiral wall of the “orbiting loop” to continuously and gradually change the contact points between its side face and the side face of the “fixed loop”. This continuous and gradual change between such contact points of the spiral perpendicular walls ultimately defines continuously decreasing chambers, and since such chambers can be filled with different fluids, then there is a possibility of compression of these various fluids.

As previously mentioned, all these elements are arranged within an airtight housing. The current state of the art provides for a multitude of means capable of housing and / or supporting all these components within the hermetic housing.

However, most of these means provide for conceptually similar embodiments, where the internal volume of the hermetic shell is divided into two, thus forming two "chambers", one with suction pressure and one with discharge pressure. The division between the suction chamber and the discharge chamber is normally carried out by a structure fixed within the hermetic housing itself, in order to promote complete isolation between said chambers. This is because any leakage of fluid between said chambers causes losses that reduce the energy efficiency of the compressor as a whole.

Other alternative embodiments of hermetic carcasses (of spiral-based compressors) are still known where the division between their internal volumes does not occur. Such embodiments do not necessarily define a suction chamber and a discharge chamber.

An example of such alternative embodiments of hermetic housings can be found in US 4,389,171, where a compressor is described which aims to reduce the motor starting torque. The functional elements of this compressor are arranged within an airtight housing that defines only a pressurized environment, that is, defines only the suction chamber. To this end, the discharge outlet of the spiral mechanism is directly extended outside the airtight compressor housing through a continuous, small volume pipe. Accordingly, it is found that the compressor described in US 4389171 is free of discharge chamber.

This embodiment makes it possible, at least in part, to reduce the motor starting torque (due to the large volume of the suction chamber), however its noise attenuation and discharge pulses are impaired, since there is no intermediate volume capable of equalize the discharge pulses.

Other examples of these alternative embodiments of airtight casings can be found in US 7182586 and US 20090110570, where compressors are described whose functional elements are also disposed within an airtight casing defining only a pressurized environment (suction chamber). In these cases, a discharge muffler (or discharge muffler) is also provided which is disposed within the suction chamber and is directly associated with the discharge outlet of the spiral mechanism by means of modular and / or additional fastening elements. , such as screws, rivets and the like. Of course, the additive need for these modular and / or additional fastening elements can be considered as a pejorative aspect.

A third example of these alternate hermetic shell embodiments can be found in US 6158989, where a compressor is described whose monoblock comprising the non-orbiting loop also defines the "lid" of the hermetic shell, and hence the discharge chamber. In any case, the use of this concept implies the definite binding of the non-orbiting loop and the discharge chamber, and this feature can be considered pejorative with respect to the guaranteed hermeticity of the compressor as a whole.

Based on the whole context explained above, it is evident to observe the need to develop a simplified and functional solution, free from the pejorative aspects mentioned above, capable of ensuring the seal between the different chambers defined inside the hermetic housing of a fluid compressor. .

Objectives of the Invention

Accordingly, it is an object of the present invention to provide a spiral-type mechanism-based fluid compressor provided with at least one suction chamber and at least one discharge chamber, both being hermetically isolated from each other by simplified and free from modular and / or additional fastening elements.

It is also an object of the present invention that the disclosed compressor discharge chamber be directly nailed to the non-orbiting loop of the compression mechanism.

In this regard, and given the need for volume optimization of the suction chamber, it is also an object of the present invention for said discharge chamber to be projected out of the hermetic housing of the compressor.

Summary of the Invention

These and other objects of the present invention are fully achieved by means of the now disclosed spiral mechanism-based fluid compressor, which is fundamentally comprised of an airtight housing formed by the union between at least two bodies, at least one driving source provided with at least one rotational axis, at least one spiral-like mechanism integrated by at least one orbiting loop and at least one non-orbiting loop, at least one block disposed between said driving source and the non-orbiting loop, at least one discharge chamber provided fluid communication with the exit of the non-orbiting loop and hermetically isolated from the internal environment of the hermetic housing. In accordance with the fundamental principles and objectives of the present invention, said disclosed fluid compressor stands out from the other similar compressors belonging to the present state of the art by the fact that: the non-orbiting loop comprises at least one locking projection; The discharge chamber comprises at least one locking structure and at least one contact edge. These characteristics then allow said discharge chamber to be hermetically secured to the non-orbiting loop through the interaction between the locking structure and the locking projection, and through the seal defined between the contact edge of the discharge chamber and the free face of the non-orbiting loop.

Preferably, the seal defined between the contact edge of the discharge chamber and the free face of the non-orbiting loop further provides at least one gasket. In this sense, it is noted that said sealing gasket can be housed in a slot defined in the free face of the non-orbiting loop, or a slot defined in the contact edge of the discharge chamber.

According to a preferred embodiment of the present invention, it is found that the locking projection of the non-orbiting loop comprises a contouring wall and, more particularly, a contouring wall projected on the free face of the non-orbiting loop. Optionally, it is further noted that the locking projection of the non-orbiting loop further provides an internal rib.

Also according to a preferred embodiment of the present invention, it is further found that the discharge chamber locking structure comprises a contour wall and, more particularly, a contour wall projected from the contact edge of the discharge chamber. Optionally, said contouring wall may be fundamentally inclined.

Still in accordance with the fundamental aspects of the present invention, said discharge chamber is at least partially projected out of the hermetic housing and more particularly vertically projected out of one end of the hermetic housing.

Also optionally, there is the possibility that at least one outlet piping is directly projected from the discharge chamber without having physical contact with the hermetic compressor casing.

Brief Description of the Drawings

The present invention will be further detailed based on the figures listed below which:

Figure 1 illustrates a schematic section of the fluid compressor according to the present invention;

Figure 2 illustrates a detail taken from figure 1; Figure 3 illustrates, in enlarged perspective, the discharge chamber integrating the fluid compressor according to the present invention; and

Figure 4 illustrates, in enlarged perspective, the non-orbiting loop integrating the fluid compressor according to the present invention.

Detailed Description of the Invention

According to the objects of the present invention, a spiral-type mechanism-based fluid compressor whose discharge chamber is directly nailed to the non-orbiting loop of the compression mechanism is then disclosed.

In this sense, said spiral-type mechanism-based fluid compressor is fundamentally comprised of an airtight housing 1, a driving source 2 and a spiral-type mechanism integrated by an orbiting loop 3, a non-orbiting loop 4 and a block 5 .

The hermetic housing 1 comprises a fundamentally conventional housing, and is formed by the union between an upper body 12 and a lower body 11, both of which are hermetically coupled to each other by joining their free ends. The joining of the free ends of the upper body 12 and lower body 11 is preferably accomplished by welding.

It is noteworthy here that the upper body 12 of the hermetic housing 1 still has an upper opening and at least one inlet pipe 72 (suction line). The driving source 2, which provides for rotational axis 21, generally comprises a

conventional rotary electric motor.

The spiral mechanism, which is fundamentally integrated by an orbiting loop 3 and a non-orbiting loop 4 (in addition to an oldham ring coupling element), has its functional principle based on concepts already pertaining to the current state of the art.

It should be noted, then, that said non-orbiting loop 4 provides for an outlet 40 and at least one locking projection 41 especially for locking and / or recessing the discharge chamber 6.

It is further noted that said block 5, which also comprises a substantially conventional block, is arranged between said driving source 2 and non-orbiting loop 4 so as to group the main compressor elements with their hermetic housing 1.

As previously mentioned, the spiral-type mechanism-based fluid compressor further comprises a discharge chamber 6 from which an outlet pipe 71 (discharge line) extends.

Said discharge chamber 6, which is provided with fluid communication with the non-orbiting loop 4, is hermetically isolated from the internal environment of the hermetic housing 1. Still with respect to the discharge chamber 6, it is found that it is of a cup-like body comprising multiple locking structures 61, a contact edge 62 and at least one outlet hole 63.

Generally speaking, it is the physical embodiment of part of the non-orbiting loop 4 and the physical embodiment of part of the discharge chamber 6 which enables the aim of the present invention to be achieved, that is, the physical embodiment of part of the non-orbiting loop. orbit 4 and the physical embodiment of part of the discharge chamber 6 which enable the attachment of said elements.

To this end, the discharge chamber 6 is hermetically secured to the non-orbiting loop 4 through the interaction between the locking structure 61 and the locking projection 41, and through the seal defined between the contact edge 62 of the discharge chamber 6 and the free face of non - orbiting loop 4.

According to the preferred embodiment of the present invention, which is illustrated in figures 1 and 2, it can be seen that the aforementioned locking projection 41 is a perpendicularly projecting contour wall from the upper face of the non-orbiting loop 4. .

It is further noted that this contouring wall (locking projection 41) further has an internal slot 42, also contouring. In this regard, and as illustrated in Figure 1, it is found that the preferred embodiment of non-orbiting loop 4 as defined by the present invention provides for a contouring wall whose internal profile is analogous to the letter "C".

Still according to the preferred embodiment of the present invention, it can be seen that the discharge chamber 6 has multiple locking structures 61, all comprising a radially inclined flap projecting from the contact edge 62. In this context, it is noted that the said contact edge 62 of the discharge chamber 6 is nothing more than the free end of the cup-like structure defining the discharge chamber 6 itself.

Accordingly, and as illustrated in Figures 1 and 2, it is noted that the locking structures 61 of the discharge chamber 6 are especially housable within the inner groove 42 of the locking projection 41 of the non-orbiting loop 4. These embodiments make that the contact edge 62 of the discharge chamber 6 is pressed against the upper face (free face) of the non-orbiting loop 4, thus defining the airtight discharge volume of the compressor.

Preferably, the seal defined between the contact edge 62 of the discharge chamber 6 and the free face of the non-orbiting loop 4 further provides at least one gasket (not shown) and more particularly an o-ring gasket . In this case, said sealing gasket is arranged in a groove 43, which is contourably defined on the free face of the non-orbiting loop 4.

Optionally, said gasket may also be housed in a groove defined in the contact edge 62 of the discharge chamber 6.

All the above aspects further allow the discharge chamber 6 to be at least partially projected out of the hermetic housing 1 and more particularly projected out of the hermetic housing 1 through the opening in the upper body 12 which integrates the housing. hermetic 1.

This feature allows the compressor to work cooler, after all, the discharge chamber 6 (usually of high temperature) is exposed to the external environment, facilitating the dissipation of its heat with the medium.

In addition to this thermal requirement, it can also be said that the separation of the discharge chamber 6 according to the invention in question from the suction volume contained within the hermetic shell 1 occurs via a shorter weld bead (disposed between from the discharge chamber 6, and part of the upper body 12 which integrates the hermetic housing 1, thus saving material and reducing the possibility of leakage.

In addition to operating temperature reduction and weld bead reduction, it is further noted that the embodiment of the invention in question allows external checking of the leakage chamber 6 tightness, that is, it allows the verification of the leakage chamber 6 tightness with the Compressor mounted (unlike conventional compressors in the state of the art where leak tightness check is only possible with disassembled compressor).

It is further noted that the outlet pipe 71, according to the preferred embodiment of the present invention, does not have any kind of physical contact and / or interaction with the hermetic housing 1. This is because said outlet pipe 71 is directly designed from of the outlet port 63 of chamber 6 which, in this case, has a projecting portion outwardly of said hermetic housing 1. This embodiment allows, for example, said chamber 6 and its respective outlet tubing 71 to be made of the same material. (which may differ from the hermetic shell 1 fabrication material), which facilitates the welding process of these elements, as well as saving the overall production costs of the compressor (considering that the chamber fabrication material 6 and outlet pipe 71 have a lower cost than the cost of the hermetic shell making material 1).

Having described an exemplary preferred embodiment of the present invention, it should be understood that the scope thereof encompasses other possible variations. In this sense, said scope of the present invention is limited only by the content of the claims, including possible substantially equivalent means.

Claims (13)

1. A spiral-type fluid-based compressor, comprising: a hermetic shell (1) formed by the union between at least two bodies (11,12); at least one driving source (2) provided with at least one rotational axis (21); at least one spiral-like mechanism integrated by at least one orbiting loop (3) and at least one non-orbiting loop (4); at least one block (5) disposed between said driving source (2) and the non-orbiting loop (4); and at least one discharge chamber (6) provided with fluid communication with the outlet (40) of the non-orbiting loop (4); the discharge chamber (6) being hermetically isolated from the internal environment of the hermetic housing (1); said fluid compressor being especially characterized by the fact that: the non-orbiting loop (4) comprises at least one locking projection (41); the discharge chamber (6) comprises at least one locking structure (61) and at least one contact edge (62); the discharge chamber (6) being hermetically fixed to the non-orbiting loop (4) through the interaction between the locking structure (61) and the locking projection (41), and through the seal defined between the contact edge (62) discharge chamber (6) and the free face of the non-orbiting loop (4). Fluid compressor according to claim 1, characterized in that the seal defined between the contact edge (62) of the discharge chamber (6) and the free face of the non-orbiting loop (4) further provides for least one gasket. Fluid compressor according to claim 2, characterized in that the sealing gasket is housed in a groove (43) defined in the free face of the non-orbiting loop (4). Fluid compressor according to claim 2, characterized in that the sealing gasket is housed in a groove defined in the contact edge (62) of the discharge chamber (6). Fluid compressor according to claim 1, characterized in that the locking projection (41) of the non-orbiting loop (4) comprises a contouring wall. Fluid compressor according to claim 5, characterized in that the locking projection (41) of the non-orbiting loop (4) comprises a contouring wall projected on the free face of the non-orbiting loop (4). Fluid compressor according to claim 1, characterized in that the locking projection (41) of the non-orbiting loop (4) further provides an internal rib (42). Fluid compressor according to claim 1, characterized in that the locking structure (61) of the discharge chamber (6) comprises a contouring wall. Fluid compressor according to Claim 8, characterized in that the locking structure (61) of the discharge chamber (6) comprises a contouring wall projected from the contact edge (62) of the discharge chamber. (6). Fluid compressor according to claim 8, characterized in that the locking structure (61) of the discharge chamber (6) comprises a fundamentally inclined contouring wall. Fluid compressor according to claim 1, characterized in that the discharge chamber (6) is at least partially projected out of the hermetic housing (1). Fluid compressor according to claim 11, characterized in that the discharge chamber (6) is at least partially vertically projected outwardly from one end of the hermetic housing (1). Fluid compressor according to claim 1, characterized in that it provides at least one outlet pipe (71) directly projected from the discharge chamber (6).