JP2018100665A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hermetic compressor.SOLUTION: The invention relates to the technological field of reciprocating compressors and acoustic muffler filters. It is disclosed a hermetic compressor, provided with at least one fluid expansion chamber, whose useful volume is narrowly defined between a section of one of faces (inner or outer) of an airtight housing of the compressor and at least one wall section adjacently attached to one of the faces of the airtight housing of the compressor.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to a hermetic compressor, and more particularly to a hermetic compressor provided with at least one fluid expansion chamber, ie a pulsation damping chamber that can be used in a discharge line (discharge muffler) or a suction line (suction muffler). About.

  According to the present invention, the hermetic compressor disclosed herein is distinguished by comprising an airtight housing and at least one additional wall, and between the airtight housing and the additional wall. The defined volume ultimately defines the fluid expansion chamber.

  As is well known to those skilled in the art, hermetic compressors, particularly positive displacement compression mechanisms, are also referred to as discharge expansion chambers (also referred to as “discharge mufflers”) and suction expansion chambers (also referred to as “suction mufflers”), among other components. Included). In a general manner, the fluid expansion chamber has the general function of attenuating effective fluid pulsations, but the functional principle governed by the passive operation of the fluid expansion chamber is widely known to acoustic experts and theorists. Known and further detailed in the technical literature.

  Current advanced technology comprises an endless model and configuration of fluid expansion chambers used in hermetic compressors.

  For example, in some configurations, the volume of the discharge expansion chamber is defined by a hollow module body that is non-fixedly disposed within the hermetic housing of the hermetic compressor. Fluid communication between the compression mechanism head, the hollow module body, and the discharge duct is performed by a rigid metal tube.

  For example, there are configurations in which the volume of the discharge expansion chamber is completely or partially defined within the compressor block itself. Fluid communication between the compression mechanism head, the compressor block, and the discharge duct is provided by a rigid metal tube.

  For example, as described in US Pat. No. 4,782,858, there is a configuration in which the volume of the discharge expansion chamber is completely defined within the cap of the compression mechanism head. Fluid communication between the compression mechanism head and the discharge duct is effected by a rigid metal tube.

  For example, as described in U.S. Patent Application Publication No. 2009/162215, the volume of the discharge expansion chamber is defined as a first “subvolume” that is completely defined within the cap of the head, and the cap of the head; There is a configuration divided into two "secondary volumes" defined between the outer surfaces of the segments of the compression cylinder block and the fluid communication between the two "secondary volumes" is the overall structure of the cylinder block Is defined within the arrangement without modification. Fluid communication between the compression mechanism head and the discharge duct is effected by a rigid metal tube.

  However, regardless of the well-known expansion chamber model or configuration, they are always placed in the compressor's hermetic enclosure, i.e. they have an effective volume such as an electric motor among other components and systems. It is noted that it is located in an internal environment that is shared with other compression mechanisms, particularly the compressor block.

  In general, the fact that the expansion chamber is placed in an airtight enclosure causes three disadvantages, one of which is from a thermal point of view and one from a dimensional point of view, and the third is reliability. Is related to the situation.

  Note that from a thermal point of view, the discharge expansion chamber is placed in an environment (in an airtight housing) where the temperature is lower than the temperature of the discharge fluid, ie the temperature outside the discharge expansion chamber is lower than the temperature inside. Is done. As a result, the internal environment (suction fluid) of the compressor housing undergoes severe heat exchange, and its temperature is adversely affected by the temperature of the discharge fluid circulating through the discharge expansion chamber. As a result, the suction temperature of the compressor increases, thus reducing its volumetric efficiency and hence energy efficiency.

As far as the dimensional perspective is concerned, it is noted that the discharge expansion chamber occupies an effective volume that is not likely to occur at the present time, but could otherwise be constrained to allow the miniaturization of the hermetic compressor. The Another advantage of reducing the compressor internal volume relates to the application of high pressure effective refrigerants such as CO ₂ that are also flammable, the compressor is included in the category of pressure vessel safety, and the internal volume defines the damage limit. For this reason, a compressor with a small internal volume is advantageous for this type of application.

  In terms of reliability, the mass mounted in the discharge pipe is reduced, which means that the housing and the internal assembly of the compressor, especially the compressor block, when transporting the compressor and also at the moment of turning the compressor on and off. Note that there is a relative motion between The removal of these masses reduces the load on the pipes and also avoids the impact of these volumes with the internal components and housing of the compressor.

  Therefore, the present invention has been made based on the above background.

US Pat. No. 4,782,858 US Patent Application Publication No. 2009/162215

  For this reason, the main object of the present invention is to have an effective volume of one of the surfaces (inner surface or outer surface) of the airtight housing of the compressor and one of the surfaces of the airtight housing of the compressor. Disclosed is a hermetic compressor provided with at least one fluid expansion chamber that is narrowly defined between at least one wall mounted adjacently.

  Accordingly, it is also an object of the present invention to provide a fluid expansion chamber that is less susceptible to heat exchange and occupies less or no useful space within the hermetic housing of the hermetic compressor.

  It is also an object of the present invention to make the fluid expansion chambers of hermetic compressors currently handled less susceptible to compressor transport and application problems and failures when turning the compressor on and off.

  For this reason, one of the objects of the present invention is that the effective volume thereof is a part of one of the surfaces (inner surface or outer surface) of the airtight housing of the compressor and one of the surfaces of the airtight housing of the compressor. The general concept of a fluid expansion chamber, which is narrowly defined between at least one wall mounted adjacent to, can be used for both the discharge muffler and the suction muffler.

  The object summarized above is achieved by a hermetic compressor disclosed herein comprising an airtight housing, at least one reciprocating compression mechanism disposed within the airtight housing, and at least one fluid expansion chamber. Fully realized. The fluid expansion chamber is formed between one of the surfaces of the hermetic housing and the inner surface of the first module body that is hermetically attached to one of the surfaces of the hermetic housing, and has at least one inflow path And at least one outflow channel.

  According to the invention, the fluid expansion chamber comprises a discharge fluid expansion chamber (discharge muffler) or a suction fluid expansion chamber (suction muffler).

  Again according to the present invention, the fluid expansion chamber is external (formed between the outer surface of the hermetic housing and the inner surface of the first module body that is hermetically attached to the outer surface of the hermetic housing) and / or the inner ( It may be formed between the inner surface of the hermetic casing and the inner surface of the first module body that is hermetically attached to the inner surface of the hermetic casing.

  Further in accordance with the present invention, the inflow and outflow paths of the fluid expansion chamber may be fluidly aligned or misaligned.

  Optionally, the hermetic compressor disclosed herein further comprises at least one second fluid expansion chamber fluidly connected in series with the “primary” fluid expansion chamber.

  In one possible embodiment of such an alternative embodiment, the second fluid expansion chamber is internal and disposed within the hermetic housing, and at least partially, the inner surface of the hermetic housing. And the inner surface of the second module body, or at least partially between the outer surface of the first module body and the inner surface of the second module body.

  In another possible embodiment of such an alternative embodiment, the second fluid expansion chamber is external and disposed outside the hermetic housing and is at least partially disposed on the outer surface of the hermetic housing. It may be formed between the inner surface of the second module body, or at least partially formed between the outer surface of the first module body and the inner surface of the second module body.

  The invention will be specifically described in detail with reference to the illustrative figures listed below.

1 schematically shows the most basic and simplified embodiment of the invention. FIG. 1 schematically shows the most basic and simplified embodiment of the invention. FIG. FIG. 6 schematically illustrates a possible embodiment of an alternative embodiment of the present invention. FIG. 6 schematically illustrates a possible embodiment of an alternative embodiment of the present invention. FIG. 6 schematically illustrates a possible embodiment of an alternative embodiment of the present invention. FIG. 6 schematically illustrates a possible embodiment of an alternative embodiment of the present invention. FIG. 6 schematically illustrates another possible embodiment of an alternative embodiment of the present invention.

  According to the central goal of the present invention, a traditional fluid that is normally displaced in an airtight housing of a hermetic compressor so that such a volume is an integral part of the compressor housing. It is desirable to “move” the volume of the expansion chamber (discharge or suction) to the vicinity of the hermetic housing.

  Of course, such an invention has the potential to optimize the internal volume of the compressor, in addition to reducing thermal radiation within the housing to promote further energy efficiency. In addition, such an invention simplifies the overall manufacturing process of the compressor, and ultimately the traditional brazing process is replaced by a faster and cheaper welding process.

  Overall, the hermetic compressor dealt with herein is a conventional hermetic compressor, and of course certain details not relevant to an understanding of the present invention have been omitted and / or omitted. Again, it is emphasized that omission or deletion of these details (eg, components that integrate the compression or damping mechanism) does not detract from a complete understanding of the specification.

  The main part of the present invention is shown in FIGS. 1A and 1B.

  As shown in these figures, the hermetic compressor disclosed herein comprises an airtight housing and a fluid expansion chamber, and the great inventive value of the present invention is that the fluid expansion chamber is—in current state of the art. Rather than being removable and conforming to itself as seen-between one of the faces of the hermetic housing and the inner surface of the first module body that is hermetically attached to one of the faces of the hermetic housing Lies in the fact that it is formed.

  Specifically, as shown in FIG. 1A, the fluid expansion chamber (2) is outside the airtight housing (1), and the outer surface (12) of the airtight housing (1) and the first module body (3). Between the inner surface (31) and the inner surface (31) of the airtight casing (1). It is further noted that, as shown, the fluid expansion chamber (2) is a discharge fluid expansion chamber.

  Specifically, as shown in FIG. 1B, the fluid expansion chamber (2) is inside the airtight housing (1), and the inner surface (11) of the airtight housing (1) and the first module body (3). Between the inner surface (31) and the inner surface (11) of the airtight casing (1). It is further noted that, as shown, the fluid expansion chamber (2) is a suction fluid expansion chamber.

  It is noted that in both embodiments shown in FIGS. 1A and 1B, the fluid expansion chamber (2) comprises at least one inflow path (21) and at least one outflow path (22).

  In the embodiment shown in FIG. 1A, the inflow channel (21) bypasses the hermetic housing (1) and connects its internal environment to the volume of the fluid expansion chamber (2) (only two examples). To mention a tube or just a through-hole). The outflow channel (22) is a fluid communication means that can allow connection between a hermetic compressor and a discharge line of an external system (not shown) such as a cooling system, for example, a discharge duct tube, to name just one example. )

  In the embodiment shown in FIG. 1B, the inflow channel (21) bypasses the hermetic housing (1) to allow a connection between an external system (not shown), eg a cooling system, and a hermetic compressor. It relates to possible fluid communication means (suction duct tube if only one example is given). The outflow channel (22) is a fluid communication means (tube, if only two examples are given) that can connect the volume of the fluid expansion chamber (2) to the internal environment of the compressor or to the cylinder (not shown) of the compression mechanism. Or just a through-hole).

  In addition to the remaining embodiments described in the present invention, in both embodiments shown in FIGS. 1A and 1B, the first module body (3) is preferably made of a metal alloy, preferably by welding. , Attached to one of the surfaces (11 and 12) of the hermetic housing (1). There is nothing that prevents the module body from being made of other types of materials, such as polymers, for example, adhesives that are alternative forms of fixation.

  Although the present invention does not intentionally solve the thermal and acoustic problems, the general dimensions and structure type of the first module body (3), as well as the general characteristics of the fastening medium, are It is worth emphasizing that the characteristics of In this regard, in any of the embodiments shown in FIGS. 1A and 1B, the inflow channel (21) and the outflow channel (22) of the fluid expansion chamber (2) may be fluidly aligned or fluidly arranged. It is most important to note that they may be offset.

  In accordance with the main parts of the invention described above, an alternative embodiment of the invention is shown in FIGS. 2A, 2B, 2C, and 2D.

  In all these alternative embodiments, one of the surfaces (11 and 12) of the hermetic housing (1) and the surface of the hermetic housing (1) (inside or outside of the hermetic housing (1) ( 11) and the presence of said fluid expansion chamber (2) (formed between the inner surface (31) of the first module body (3) which is hermetically attached to one of) and the fluid expansion chamber ( Note the presence of at least one second fluid expansion chamber (4) fluidly connected in series to 2). The fluid expansion chambers (2 and 4) can be adapted to a series volume of discharge fluid or a series volume of suction fluid.

  In a general manner, the configuration of the second fluid expansion chamber (4) always has a second module body (5), which is also substantially similar to the first module body (3) in the general manner. doing.

  The configuration of the second fluid expansion chamber (4), which always uses the second module body (5), is varied and some examples are shown in FIGS. 2A, 2B, 2C, and 2D.

  As shown in FIG. 2A, both the fluid expansion chamber (2) and the second fluid expansion chamber (4) are external and preferably dedicated to the discharge fluid. In this embodiment, the second fluid expansion chamber (4) is formed only between the outer surface (32) of the first module body (3) and the inner surface (51) of the second module body (5).

  As shown in FIG. 2B, both the fluid expansion chamber (2) and the second fluid expansion chamber (4) are internal and preferably dedicated to suction fluid. In this embodiment, the second fluid expansion chamber (4) comprises an outer surface (32) of the first module body (3), an inner surface (11) of the airtight housing (1), and an inner surface of the second module body (5). (51).

  As shown in FIG. 2C, both the fluid expansion chamber (2) and the second fluid expansion chamber (4) are external and preferably dedicated to the discharge fluid. In this embodiment, the second fluid expansion chamber (4) comprises an outer surface (32) of the first module body (3), an outer surface (12) of the airtight housing (1), and an inner surface of the second module body (5). (51).

  As shown in FIG. 2D, both the fluid expansion chamber (2) and the second fluid expansion chamber (4) are internal and preferably dedicated to aspiration fluid. In this embodiment, the second fluid expansion chamber (4) is formed only between the inner surface (11) of the airtight housing (1) and the inner surface (51) of the second module body (5).

  In these four embodiments, the fluid expansion chamber (4) comprises an outflow channel (6) directed to a fluid communication means (traditional tube, simple through hole or through tube, to name three examples). Of particular note. In this sense, it is noted that the “inflow path” of the fluid expansion chamber (4) is always defined and terminated by the outflow path (22) of the fluid expansion chamber (2).

  The structural details described (or omitted) with respect to the fluid expansion chamber (2) (eg possible structural and dimensional variations and suitable forms of fixation by welding) are also observed in the fluid expansion chamber (4) as well. The

  In contrast to the alternative embodiment shown in FIGS. 2A, 2B, 2C, and 2D, the alternative embodiment shown in FIG. 3 uses two fluid expansion chambers that are fluidly connected in series. One of these chambers is disposed internally (relative to the compressor housing) and the other of these chambers is external (relative to the compressor housing). Is arranged.

  For this purpose, a hermetic compressor comprising an airtight housing (1), a first fluid expansion chamber (2) and a second fluid expansion chamber (4) is provided, as arbitrarily defined in FIG. These chambers are fluidly connected in series to define a series volume of discharge fluid (which can of course also define a series volume of suction fluid).

  In particular, the first fluid expansion chamber (2) is in particular a first module body (3) which is hermetically attached to the inner surface (11) of the hermetic housing (1) and the inner surface (11) of the hermetic housing (1). ) Between the outer surface (12) of the hermetic housing (1) and the outer surface (12) of the hermetic housing (1). ) Is hermetically attached to the inner surface (31) of the first module body (3). The fluid connection between the volumes is made in the same manner as the configurations and options shown in FIGS. 2A, 2B, 2C, and 2D.

  It is important to emphasize that the above description has only the purpose of illustrating a particular embodiment of the subject utility model by way of example. Thus, it is apparent that modifications, variations, and structural combinations of elements that perform the same function in substantially the same way to achieve the same result fall within the scope of protection defined by the appended claims. It is.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 1st fluid expansion chamber 3 1st module body 4 2nd fluid expansion chamber 5 2nd module body 6, 22 Outflow path 11, 31, 51 Outer surface 12, 32 Outer surface 21 Inflow path

Claims (14)

A hermetic compressor,
An airtight housing (1);
At least one reciprocating compression mechanism (not shown) disposed in the hermetic housing (1);
At least one fluid expansion chamber (2);
With
In the hermetic compressor, the fluid expansion chamber (2) is one of the surfaces (11, 12) of the hermetic housing (1) and one of the surfaces (11, 12) of the hermetic housing (1). Formed between the inner surface (31) of the first module body (3) which is airtightly attached to the
The fluid expansion chamber (2) is particularly characterized in that it comprises at least one inflow channel (21) and at least one outflow channel (22),
Hermetic compressor.   A hermetic compressor according to claim 1, characterized in that the fluid expansion chamber (2) comprises a discharge fluid expansion chamber.   The hermetic compressor according to claim 1, characterized in that the fluid expansion chamber (2) comprises a suction fluid expansion chamber.   The fluid expansion chamber (2) is outside, the outer surface (12) of the airtight housing (1), and the inner surface of the first module body (3) airtightly attached to the outer surface (12) of the airtight housing (1). It forms between (31), The hermetic compressor of Claim 1 characterized by the above-mentioned.   The fluid expansion chamber (2) is inside, and the inner surface (11) of the airtight housing (1) and the inner surface of the first module body (3) that is airtightly attached to the inner surface (11) of the airtight housing (1). It forms between (31), The hermetic compressor of Claim 1 characterized by the above-mentioned.   The hermetic compressor according to claim 1, characterized in that the inlet (21) and the outlet (22) of the fluid expansion chamber (2) are fluidly aligned.   The hermetic compressor according to claim 1, characterized in that the inlet (21) and the outlet (22) of the fluid expansion chamber (2) are fluidly offset.   The hermetic compressor according to claim 1, further comprising at least one second fluid expansion chamber (4) fluidly connected in series with the fluid expansion chamber (2).   9. Hermetic compressor according to claim 8, characterized in that the second fluid expansion chamber (4) is inside and is arranged in an airtight housing (1).   The second fluid expansion chamber (4) is at least partially formed between the inner surface (11) of the airtight housing (1) and the inner surface (51) of the second module body (5). The hermetic compressor according to claim 9, wherein   The second fluid expansion chamber (4) is at least partially formed between the outer surface (32) of the first module body (3) and the inner surface (51) of the second module body (5). The hermetic compressor according to claim 9, wherein   The hermetic compressor according to claim 8, characterized in that the second fluid expansion chamber (4) is external and arranged outside the hermetic housing (1).   The second fluid expansion chamber (4) is at least partially formed between the outer surface (12) of the airtight housing (1) and the inner surface (51) of the second module body (5). The hermetic compressor according to claim 12, wherein   The second fluid expansion chamber (4) is at least partially formed between the outer surface (32) of the first module body (3) and the inner surface (51) of the second module body (5). The hermetic compressor according to claim 12, wherein

Images