Patent Application
20250154944
The present disclosure relates to the subject matter disclosed in German application number 10 2023 131 578.1 of 14 Nov. 2023, which is incorporated herein by reference in its entirety and for all purposes.
The invention relates to a semi-hermetic refrigerant compressor comprising a compressor unit and an electric motor, an overall housing which has a motor housing portion for the electric motor and a compressor housing portion for the compressor unit, a suction-side refrigerant path extending from a suction port on the overall housing to the compressor unit, and a pressure-side refrigerant path extending to a pressure port of the compressor unit.
In semi-hermetic refrigerant compressors of this type, there exists the problem that particles carried along by the refrigerant are introduced into the electric motor and possibly also the compressor unit and can lead to damage there.
In accordance with an embodiment of the invention, provision is made to improve a semi-hermetic refrigerant compressor such that problems with particles carried along out of the refrigerant circuit by the refrigerant can be prevented.
In accordance with an embodiment of the invention, provision is made with a semi-hermetic refrigerant compressor of the type mentioned in the introduction that an inlet for refrigerant to be fed to a motor compartment in the motor housing portion is arranged on the motor housing portion in a region situated opposite the compressor housing portion and that the inlet is provided with a cover which has an entry guide element and a filter element for separating out particles carried along by means of the refrigerant.
The advantage of the solution according to the invention lies in that with this type of a cover for the inlet, said cover having a filter element for the particles carried along by the refrigerant, the problems mentioned in the introduction can be prevented.
An advantageous solution provides that the cover overlaps an opening of the inlet facing toward the motor compartment and thus completely covers this opening.
With regard to the configuration of the cover, no further details have so far been given.
An advantageous solution thus provides that the cover has a frame holding and fixing the filter element.
Preferably, the frame is configured so that it surrounds the opening of the inlet facing toward the motor compartment on the external side of said opening.
With regard to the configuration of the inlet, no further details have so far been given.
An advantageous solution thus provides that the inlet allows a refrigerant flow to impinge upon the cover, in particular, through an inlet channel formed by said inlet, in a direction of flow directed toward a rotor of the electric motor.
Such a configuration of the inlet has the advantage that the refrigerant flow directed in this way can be optimally utilized for cooling the electric motor.
In particular, it is therein provided that the cover has a flow distribution element as the entry guide element, which distributes a refrigerant flow passing through the inlet to regions of the filter element surrounding the flow distribution element, in order thus to allow the refrigerant to enter, with a greatest possible cross-section and a most even possible spatial distribution, into the motor compartment.
In particular herein, the inlet is configured such that it allows the refrigerant flow to impinge upon the flow distribution element so that said flow distribution element can act optimally to distribute the refrigerant flow.
With regard to the configuration of the inlet, no further details have so far been given.
Thus, an advantageous solution provides that the inlet has an inlet chamber which is provided for accommodating particles held back by the filter element and that the cover overlaps an opening of the inlet chamber facing toward the motor compartment.
Preferably, the inlet chamber is arranged, relative to an inlet channel of the inlet, downstream thereof and is configured extended in a radial direction relative thereto.
In particular, the inlet chamber itself directly adjoins the filter element and can thus directly accommodate the particles held back by the filter element.
Preferably therein, the inlet chamber is provided with a collecting region for particles held back by the filter element, so that thereby the particles do not substantially disrupt the further filtering effect of the filter element.
Preferably, the collecting region is provided at a site of the inlet chamber that is situated lowest in the direction of gravity.
In order, in particular, also to feed particles deflected by the flow distribution element in an optimum manner to the collecting region, it is preferably provided that the cover has a particle guiding element as the entry guide element, which extends from the flow distribution element to a collecting region of the inlet chamber and thus feeds the particles as efficiently as possible to the collecting region.
Furthermore, it is preferably provided that the cover has a screening element as the entry guide element, which delimits the collecting region for particles filtered out of the refrigerant flow by the filter element and becoming deposited in the collecting region of the inlet chamber.
It is therein particularly favorable if the screening element reduces, in particular prevents, a throughflow through a part of the refrigerant flow of the particles becoming deposited in the collecting region of the inlet chamber.
With regard to the configuration of the filter element, no further details have so far been given.
An advantageous solution thus provides that the filter element is made from a wire gauze or a wire mesh.
A wire gauze or a wire mesh therein forms an optimal possibility for configuring the filter element with the smallest possible through openings for the refrigerant in order to filter out the particles from the refrigerant in optimal manner.
It is therein preferably provided that the wire gauze or wire mesh of the filter element extends as far as the frame and is held thereon.
With regard to the arrangement of the flow distribution element relative to the filter element, no further details have so far been given.
It is preferably provided that the flow distribution element is arranged, in the flow direction, in front of the filter element and partially covers it.
It is therein particularly favorable if the flow distribution element is arranged on the filter element and partially covers it, in particular, abuts the filter element.
With regard to the arrangement of the particle deflecting element, it is also advantageous if the particle deflecting element is also arranged, in the flow direction, in front of the filter element and partially covers it.
It is also favorable for the particle deflecting element if it abuts the filter element itself.
It is further advantageous, with regard to the screening element if the screening element is arranged, in the flow direction, in front of the filter element and partially covers it.
It is therein also advantageous for the arrangement of the screening element if it is arranged abutting the filter element.
A particularly advantageous solution provides that the flow distribution element and/or the particle deflecting element and/or the screening element are a portion of an entry guide mask.
Therein, the entry guide mask can be a separate element which abuts the cover and, in particular, is connected to the cover.
In particular, the cover is configured such that it comprises the entry guide mask.
Alternatively to the provision of a mesh or gauze for the filter element, a further solution provides that the filter element is formed by a thin flat material or, in particular, a foil, held, for example, by the frame.
Therein, the thin flat material, in particular, the foil could itself already be a porous material.
A particularly favorable solution provides that the filter element is formed by apertures introduced into the thin flat material, in particular, the foil.
Such apertures can be easily introduced, for example, in a targeted manner into the thin flat material, in particular, the foil, by means of laser machining.
In the event that the apertures are introduced specifically into the thin flat material, in particular the foil, it is particularly favorable if the flow distribution element is integrated into the thin flat material, in particular the foil.
It can be integrated very easily into the foil in that, at the site of the flow distribution element, fewer or no apertures are provided.
Furthermore, the particle deflecting element can also be introduced in a simple manner into the thin flat material, in particular the foil, in that fewer or no apertures are introduced at the site thereof.
Furthermore, the screening element can suitably also be integrated into the thin flat material, in particular the foil, in that fewer or no apertures are introduced at the site thereof.
In order to be able to remove particles collecting in the inlet chamber, in particular in the collecting region thereof, from said inlet chamber, it is preferably provided that the inlet chamber is provided with an externally arranged access opening in addition to the inlet, so that independently of the inlet, a possibility exists for sucking or rinsing the particles out of the inlet chamber.
It is particularly favorable if the external access opening is arranged in the region of the collecting region of the inlet chamber.
It is particularly favorable if the external access opening opens into the collecting region of the inlet chamber.
Preferably, the access opening is closable by means of a closing body.
A further advantageous solution provides that a receptacle chamber adjoins the collecting region of the inlet chamber and penetrates into the end cap so that yet more space is provided by the receptacle chamber for accommodating the particles and, consequently, the intervals for removing the particles can be prolonged.
The receptacle chamber further provides the possibility that it penetrates the whole of the end cap and is accessible from a side of the end cap facing away from the motor compartment, so that an enlarged accessway to the receptacle chamber is available and can then be covered, in particular, by a closure element that is fixable on the end cap and can be closed.
The description above of solutions according to the invention thus comprises, in particular, the different feature combinations defined by the following sequentially numbered embodiments:
Further features and advantages of the invention are the subject matter of the following description and of the illustration in the drawings of some exemplary embodiments.
An exemplary embodiment of a semi-hermetic refrigerant compressor according to the invention shown in
The overall housing 10 is formed, for example, by a housing sleeve 16 comprising both the compressor housing portion 12 and also the motor housing portion 14, said housing sleeve being closed on the compressor housing portion 12 side by an end cap 22 and on the motor housing portion 14 side by an end cap 24.
Provided on the end cap 24 closing the motor housing portion 14 is a suction gas port identified overall as 32, configured, for example, as a suction gas valve, by means of which, as shown in
To drive the compressor unit 54, a drive shaft 74 extends in a drive compartment 72 of the compressor housing portion and drives the cylinders 561, 581 by means of eccentrics 761 and 781.
The drive shaft 74 is therein mounted in a shaft bearing 82 held on the end cap 22 and a shaft bearing 84 arranged between the compressor housing portion 12 and the motor housing portion 14 and extends with a drive portion 86 as far as into the rotor 46 which is mounted by the drive portion 86 to be rotatable about the axis 48.
As shown in
The portion 92 is, for example, configured such that it overlaps the end windings 96 of the stator 44 facing toward the end cap 24 which extend so far into the end cap 24 such that between the end windings 96 and the end body 94, an intermediate space 98 still remains.
As shown in
Preferably, the inlet channel 102 is approximately arranged relative to the rotor 46 such that the refrigerant flow passing through it is directed toward the drive portion 86 and, in the same manner, the inlet chamber 104 adjoining it is also oriented with its opening 106 facing toward the motor compartment 36.
The opening 106 is therein covered by a cover identified overall as 112, which, as shown in
In addition to the frame 114, the cover 112 comprises a filter element 118, held clamped by the frame 114, through which the refrigerant entering on the suction side flows and which filters out particles carried along by the refrigerant that is fed in on the suction side before the entry of the refrigerant into the motor compartment 36, so that the filtered-out particles collect in the inlet chamber 104, preferably in a collecting region 122 situated in the direction of gravity below the inlet channel 102.
Preferably therein the filter element 118 is formed from a filter material which has apertures of a size less than 250 μm, better still, less than 200 μm and preferably in the region of approximately 150 μm.
Suitably therein, the filter element 118 is formed by a mesh made of metal wires, in particular, a so-called plain Dutch weave in which warp wires are configured thicker than the weft wires in order to obtain the desired small mesh size for the apertures.
In order to distribute the refrigerant flowing in by means of the inlet opening 102 optimally to the rotor 46 and the stator 44 for cooling thereof, in the first exemplary embodiment of the refrigerant compressor according to the invention, the cover 112 has an entry guide mask 128 (
This flow distribution element 136 is formed, for example, as shown in
The flow distribution element 136 simultaneously also serves as an impact protection or wear protection in order to preserve the components otherwise directly impinged upon by the refrigerant flow.
Preferably therein, the holding web 144 extending in the direction of gravity from the flow distribution element 136 is configured widened and is a particle guiding element serving as a further entry guide element in order to guide the particles impinging upon the flow distribution element 136 in the direction of the collecting region 122.
Furthermore, the particle guiding element 144 preferably transitions into a screening element 146 serving as a further entry guide element, which reduces the flow through the collecting region 122 by refrigerant and thereby reduces the throughflow of the particles becoming deposited in this collecting region 122, wherein the screening element 146 preferably also has a closed sickle-like form and is formed onto the frame 134.
The frame 134 of the screening element 146 is connected to the frame 114 so that the combination of the frame 114 with the filter element 118 and the entry guide mask 128 form the cover 112′ shown in
In a first variant of the first exemplary embodiment, it is provided to connect both the filter element 118 and also the entry guide mask 128 to the frame 114.
In a second variant of the first exemplary embodiment, it is provided to connect the entry guide mask 128 directly to the filter element 118, in particular to fix it on the filter element without a direct connection taking place between the frame 114 and the entry guide mask 128.
In a third variant of the first exemplary embodiment, it is provided to install the frame 114 with the filter element 118 and the frame 134 with the entry guide mask 128 as separate parts.
In a second exemplary embodiment of a refrigerant compressor according to the invention shown in
The access opening 148 is therein closable by means of a closing body 152.
Otherwise, in the second exemplary embodiment, those elements which are identical to those elements of the above embodiment are provided with the same reference signs, so that, in respect of the description thereof, reference can be made in full to the description regarding these exemplary embodiments.
In contrast to the preceding exemplary embodiments, in a third exemplary embodiment, shown in
Otherwise, in this exemplary embodiment also, the elements which are identical to those of the above exemplary embodiments are provided with the same reference signs, so that with regard to the description thereof, reference can be made in full to the statements made regarding the above exemplary embodiments.
In a fourth exemplary embodiment of a cover 112′ according to the invention, shown in
In the case of a thin flat material 162, however, the frame 114′ can also be omitted if said material has sufficient intrinsic stiffness.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2023 131 578.1 | Nov 2023 | DE | national |
