Scroll Compressor

Abstract

A scroll compressor (1) for compressing a fluid, the scroll compressor (1) having a compressor housing (2) with a fluid inlet opening (3) and a fluid outlet opening (4), a housing-fixed scroll support (5) with a housing-fixed scroll (6), and a movable scroll support (7) with a movable scroll (8), wherein a fluid flow path (10) extends from the fluid inlet opening (3) through a plurality of intermediate chambers (11) between the scrolls (6, 8) to the fluid outlet opening (4), and the movable scroll (6, 8) compresses the fluid. A scroll compressor (1) in which a first seal receiving groove (13) having a first spiral seal (14) with a first seal surface (15) disposed therein is formed in the roll (8), and a second seal receiving groove (17) having a second spiral seal (18) with a second seal surface (19) disposed therein is formed in the housing-fixed scroll (6), and pressurized pipes (20, 21) respectively open into the seal receiving groove (13) on the side of each spiral seal (14, 18) opposite the respective seal surfaces (15, 19).

Description

[Technical Field]

[0001] The present invention relates to a scroll compressor for compressing a fluid, particularly a gas, the scroll compressor having a compressor housing with a fluid inlet opening and a fluid outlet opening, in which a fixed scroll support having a fixed scroll is disposed in a fixed position within the compressor housing, and a movable scroll support having a movable scroll is disposed movably within the compressor housing, the movable scroll being drivable by an eccentric body of the scroll compressor, a fluid flow path extending from the fluid inlet opening to the fluid outlet opening through a plurality of intermediate chambers between the scrolls for compressing the fluid, and a first spiral seal disposed within the end face of the movable scroll facing away from the movable scroll support. a first seal receiving groove is formed, the movable scroll contacts the fixed scroll support with a first seal surface of a first spiral seal, a second seal receiving groove is formed in an end face of the fixed scroll facing away from the fixed scroll support, and a second spiral seal is disposed therein, the fixed scroll contacts the movable scroll support with a second seal surface of the second spiral seal, a plurality of first pressurized pipes extend from the intermediate chamber through the movable scroll to the first seal receiving groove, and a plurality of second pressurized pipes extend from the intermediate chamber through the fixed scroll to the second seal receiving groove. [Background technology]

[0002] Such scroll compressors are known in the prior art. Scroll compressors are often called scroll compressors. The aforementioned prior art is shown in Chinese Patent Application Publication No. 109058111. In this application, the pressurized lines each open laterally into a seal receiving groove. In this application, whether the pressurized lines are covered by a spiral seal depends on the position of the spiral seal in the seal receiving groove. Summary of the Invention [Problem to be solved by the invention]

[0003] The object of the present invention is to improve the scroll compressor of the type mentioned at the beginning. [Means for solving the problem]

[0004] For this purpose, the invention proposes that the first pressure line opens into the first seal receiving groove on the side of the first spiral seal opposite the first sealing surface, and the second pressure line opens into the second seal receiving groove on the side of the second spiral seal opposite the second sealing surface.

[0005] A significant advantage of each pressure line opening into each seal receiving groove on the side of each spiral seal opposite its sealing face is that pressure can be applied to the spiral seal via the respective pressure line on the side opposite its sealing face, regardless of the spiral seal's position in the seal receiving groove. Unlike the prior art described at the beginning, each spiral seal does not cover or close its respective pressure line, thereby preventing pressure from being applied via the pressure line. A further advantage of the present invention is that each spiral seal can be preloaded and installed in its respective seal receiving groove in a static state. Furthermore, the present invention makes it possible to automatically readjust the spiral seals throughout their service life, even in the event of wear, because it is always guaranteed that pressure can be applied to each spiral seal on the side opposite its sealing face.

[0006] Preferably, each pressurized line opens at its end opposite the respective seal receiving groove into the region of the side wall of the respective scroll, which side wall faces the intermediate space between the scrolls and is arranged between the respective end face of each scroll and the respective scroll support of each scroll. This applies both to a movable scroll having a movable scroll support, an end face facing away from the movable scroll support and a first seal receiving groove arranged therein, and to a fixed scroll having a fixed scroll support, an end face facing away from the fixed scroll support and a second seal receiving groove arranged therein.

[0007] The scroll compressor according to the present invention is also sometimes called a scroll compressor. A scroll compressor primarily functions to compress gas, and in this case, the concept of gas also includes a mixture of various gases. However, the fluid to be compressed by the scroll compressor according to the present invention may be a medium having both a gas phase and a liquid phase. One example of this is transcritical carbon dioxide.

[0008] A preferred variant of the invention specifies that the first pressure lines are formed as at least one hole in the respective movable scroll, and the second pressure lines are formed as at least one hole in the respective fixed scroll of the housing.

[0009] It is also advantageous if the first and second pressure lines each have a bent, preferably L-shaped, extension, which in particular may be an extension bent at a right angle.

[0010] It may be specified that each pressure line has the same diameter on both sides of the bent portion. However, it may also be specified that the first and second pressure lines each have a different diameter on one side of the bent portion in the extension from this side to the opposite side. One possible configuration, for example, specifies that the first and second pressure lines each have a larger diameter on the side of the bent portion in the extension facing the respective intermediate chamber than on the opposite side.

[0011] To achieve the desired movement of the movable scroll, a particularly preferred embodiment of the present invention specifies that the scroll compressor has a coupling pin displaceably supported in a slot in the fixed scroll support and in a slot in the movable scroll support. Preferably, the slots are arranged at an acute angle to one another when viewed in plan. Cooperation between the coupling pin guided in the slot and the eccentric driving the movable scroll ensures that the movable scroll can orbit within the compressor housing and thus within the fixed scroll. Therefore, in this case, the movable scroll is sometimes referred to as an orbiting scroll, and the movable scroll support is sometimes referred to as an orbiting scroll support. The eccentric is preferably located eccentrically on the drive shaft, which, when rotating about its longitudinal axis, causes a corresponding eccentric movement of the eccentric and thus of the movable scroll. The drive shaft may be connected to the scroll compressor's own motor, or to an external motor or other drive device. Of course, it is also possible to drive the eccentric directly without a corresponding drive shaft.

[0012] A first group of scroll compressors according to the present invention specifies that in the first seal groove, a respective cover for covering the first pressure line is arranged between the first spiral seal arranged in the first seal groove and the first pressure line opening into the first seal groove, and in the second seal groove, a respective cover for covering the second pressure line is arranged between the second spiral seal arranged in the second seal groove and the second pressure line opening into the second seal groove. The cover for each pressure line is preferably movably supported on or within the pressure line, so that the pressure present in the respective pressure line can be transmitted to the corresponding spiral seal via the cover. It may also be noted that the cover simply rests on or is simply loosely inserted into the pressure line.

[0013] However, in another embodiment of the invention, the cover for the pressure line can be omitted entirely, for example, if the first spiral seal is configured as a recess and is fitted into the first seal receiving groove, and the second spiral seal is configured as a recess and is fitted into the second seal receiving groove.

[0014] Alternatively, however, the first spiral seal can be injection molded or 3D printed into the first seal receiving groove, and / or the second spiral seal can be injection molded or 3D printed into the second seal receiving groove. In this case where each spiral seal is injection molded or printed into its respective seal groove, the cover can prevent material from each spiral seal from inadvertently entering the respective pressurized line during the injection molding or 3D printing process.

[0015] The first spiral seal and the second spiral seal are preferably made of a polymer or a polymer containing a dry lubricant and / or reinforcing fibers. Examples of polymers that can be used include polyetheretherketone, polyamideimide, polyoxymethylene, polyketone, polyamide, or polyethylene terephthalate. Examples of dry lubricants that can be used include polytetrafluoroethylene or molybdenum disulfide. Examples of reinforcing fibers that can be used include glass fibers or carbon fibers.

[0016] The fixed scroll support with the fixed scroll, the movable scroll support with the movable scroll, and the various components of the compressor housing each preferably have a substrate made of aluminum alloy or cast iron. A coating is preferably applied to this substrate. This coating may be, for example, a nickel-phosphorus layer, an aluminum oxide layer, or a dry-lubricating, slip-resistant paint layer. It is also possible to combine at least two of these layers. The coating may be applied directly to the respective substrate. However, an open-cell anchoring layer may also be present on the substrate, in which case the coating is applied to this anchoring layer.

[0017] If the substrate is made of an aluminum alloy, the anchoring layer can be, for example, an open-cell aluminum oxide layer, such as anodized aluminum or densified hard anodized aluminum. Another variant of the support layer or anchoring layer is a plasma-chemically oxidized open-cell aluminum layer. If the substrate is made of cast iron, the support layer or anchoring layer can be formed, for example, by phosphating or sandblasting.

[0018] Unless the meaning is misinterpreted, the term "one" (ein or eine) used in this specification should also be understood to mean "at least one" (zumindest ein or zumindest eine). The terms "first" and "second" in terms of seal receiving grooves, spiral seals, sealing surfaces, and pressure lines are used purely for distinguishing purposes and have no further significance. The terms may be interchanged.

[0019] Further features and details of preferred embodiments of the invention are explained by way of example in the following drawings based on various embodiments of the invention. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 2] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 3] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 4] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 5] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 6] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 7] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 8] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 9] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 10] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 11]1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 12] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 13] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 14] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 15] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 16] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 17] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 18] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 19] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 20] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 21] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 22] 1 is a diagram showing a first embodiment of a scroll compressor according to the present invention; [Figure 23] FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. [Figure 24] FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. [Figure 25] FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. [Figure 26] FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. [Figure 27] FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. [Figure 28]FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. [Figure 29] FIG. 2 shows a second embodiment of a scroll compressor according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] 1 shows a first embodiment of a scroll compressor 1 according to the invention in a side view of a compressor housing 2, which in the example of FIG. 1 is formed from three housing parts 5, 32, 33. In both embodiments, a housing-fixed scroll support is integrated into housing part 5, which will hereinafter be referred to as housing-fixed scroll support 5. This housing-fixed scroll support 5 is manufactured with a housing-fixed scroll 6, but may also be manufactured as a separate part and then placed in a permanent position within the compressor housing 2.

[0022] At the bottom, a drive shaft 34 projects beyond the compressor housing 2. This drive shaft 34 is connected to any rotary drive, for example an electric motor or the like, by means of which the movable scroll support 7 with the movable scroll 8 can be moved within the compressor housing 2, as will be explained in more detail subsequently below.

[0023] Also visible in FIG. 1 are the fluid inlet openings 3 in the region of the housing-fixed scroll support 5, as well as the fluid outlet openings 4 which lead from the compressor housing 2 to the outside at the top.

[0024] Figure 2 shows a plan view of the scroll compressor 1 of the first embodiment. In addition to the parts already described, Figure 2 also shows screws 35 that attach the housing-fixed scroll support 5 to the housing part 32. Furthermore, Figure 2 shows a section line AA. Figure 3 shows a vertical cross section of the scroll compressor 1 shown in Figure 2 taken along the section line AA.

[0025] 3, the fixed scroll support 5 with the fixed scroll 6 can be seen. Both are fixedly arranged in the compressor housing 2. The movable scroll support 7 with the movable scroll 8 can also be seen. Both components are movably arranged in the compressor housing 2. In the first exemplary embodiment, the movable scroll 8, together with the movable scroll support 7, can be driven by an eccentric 9. This eccentric 9 is located eccentrically on a drive shaft 34. This drive shaft 34 runs through both the housing part 32 and the housing part 33 and is rotatably supported there by corresponding bearings 39, which in the illustrated embodiment are configured as ball bearings. A retaining ring 40 holds one of the bearings 39 stationary in the housing part 32.

[0026] The eccentric 9 engages in the movable scroll support 7 by means of a bearing 39, which in the illustrated embodiment is also formed as a ball bearing. The movable scroll support 7, together with the movable scroll 8, is arranged in the corresponding free space of the housing part 32 and the fixed scroll support 5, where it is movably supported by the eccentric 9 or the drive shaft 34. A sealing ring 25 is used to provide a corresponding seal for the housing part 32.

[0027] For compressing the fluid, a fluid flow passage 10 extends from the fluid inlet opening 3 through an intermediate chamber 11 between the scrolls 6, 8 to a fluid outlet opening 4 located centrally above the scroll support 5 fixed to the housing.

[0028] In a preferred embodiment, an overpressure valve 36 is located in the region of the fluid outlet opening 4, as shown in Figure 3, which only opens when the fluid compressed between the scrolls 6, 8 is under a correspondingly high pressure. When this overpressure valve 36 is open, the correspondingly compressed fluid can escape via the fluid outlet opening 4.

[0029] Specifically, in the first exemplary embodiment, the overpressure valve 36 has a closing pin 37 that can close the fluid flow path 10 accordingly. The closing pin 37 is supported by a compression spring 38 on a support 41 that is firmly connected to the compressor housing 2. The compression spring 38 preloads the closing pin 37 in the direction toward the closed position of the overpressure valve 36. By selecting a corresponding compression spring 38, the pressure threshold at which the overpressure valve 36 opens can thus be adjusted. Naturally, other overpressure valves 36 may also be used in the illustrated configuration. Naturally, the variant shown in FIG. 3 is merely an example.

[0030] The movable scroll 8 has a first seal receiving groove 13 with a first spiral seal 14 disposed therein at its end face 12 facing away from the movable scroll support 7. The movable scroll 8 contacts the fixed scroll support 5 with a first seal surface 15 of the first spiral seal 14. The movable scroll support 7 of the first embodiment is shown separately in FIG.

[0031] The fixed scroll 6 has a second seal receiving groove 17 formed in its end face 16 facing away from the fixed scroll support 5, in which a second spiral seal 18 is disposed. The fixed scroll 6 contacts the movable scroll support 7 with a second sealing surface 19 of the second spiral seal 18. The fixed scroll support 5 of the first embodiment is shown separately in FIG. 9. The sealing surfaces 15, 19 of the spiral seals 14, 18 serve to properly seal each scroll 6, 8 against the corresponding scroll support 5, 7, respectively.

[0032] Pressure is applied to the spiral seals 14, 18 from the intermediate chamber 11 in order to press the seals 14, 18 with their respective sealing surfaces 15, 19 against the corresponding scroll supports 5, 7. For this purpose, a first pressure line 20 extends from the intermediate chamber 11 through the movable scroll 8 to the first seal groove 13. A second pressure line 21 correspondingly extends from the intermediate chamber 11 through the fixed scroll 6 to the second seal groove 17. In this case, it is specified in accordance with the invention that the first pressure line 20 opens into the first seal groove 13 on the side of the first spiral seal 14 facing away from the first sealing surface 15, and the second pressure line 21 opens into the second seal groove 17 on the side of the second spiral seal 18 facing away from the second sealing surface 19.

[0033] The extension of the pressurized lines 20, 21 will be explained in more detail subsequently below.

[0034] FIG. 4 shows an exploded view of the individual components of the scroll compressor 1 of the first embodiment.

[0035] To compress the fluid, the movable scroll 8 together with the movable scroll support 7 performs a so-called orbiting movement, as is known from the prior art, which occurs as a result of the movement of the eccentric body 9 in cooperation with the connection of the movable scroll support 7 to the fixed scroll support 5 via a connecting pin 28, which will be explained further below. The orbiting movement of the movable scroll 8 causes a constant change in the intermediate space 11 between the fixed scroll 6 and the movable scroll 8, so that the fluid sucked in via the fluid inlet opening 3 is conveyed along the fluid flow path 10 into the intermediate space 11 between the scrolls 6, 8 and is simultaneously compressed, so that it can flow in a compressed state through the central region between the scrolls 6, 8 and out the fluid outlet opening 4 when the overpressure valve 36 is correspondingly opened.

[0036] 5 to 8 show horizontal cross sections of the scroll support 5 fixed to the housing and the scrolls 6, 8 along the section line BB shown in Fig. 3, with different relative positions of the scrolls 6, 8 shown in Fig. 5 to 8 in the form of snapshots of the orbiting movement. Such compression of a fluid by a corresponding scroll compressor 1 is known and therefore does not need further explanation.

[0037] FIGS. 9-15 show various views of the housing-fixed scroll support 5 including the housing-fixed scroll and first spiral seal 14 of the first embodiment. FIG. 9 shows a perspective view of the housing-fixed scroll support 5 from below, in which the second spiral seal 18 and a cover 31, which will be further described below, have been removed from the housing-fixed scroll support 5 and are shown exploded. FIG. 10 shows a view of the housing-fixed scroll support 5 from below. FIG. 11 shows a cross-sectional view taken along line CC shown in FIG. 10, FIG. 12 shows a cross-sectional view taken along line DD shown in FIG. 10, FIG. 13 shows an enlarged view of area G shown in FIG. 12, and FIG. 14 shows a cross-sectional view taken along line EE shown in FIG. 10. 15 shows an enlarged view of detail F shown in FIG. 10, and FIG. 16 shows the second spiral seal 18 removed from the housing-fixed scroll support 5.

[0038] 11 and 12, the cross-sectional views taken along the lines CC and DD clearly show how the second spiral seal 18 is disposed in the second seal groove 17 of the fixed scroll 6. The second seal surface 19 of the second spiral seal 18 faces outward from the second seal groove 17, thereby enabling it to come into intimate contact with the movable scroll support 7, as previously shown in FIG. 3. FIG. 13 shows, on an enlarged scale, how the second pressurized line 21 opens into the second seal groove 17 on the side of the second spiral seal 18 opposite the second seal surface 19. In the region of this opening, a mushroom-shaped cover 31 is arranged, which in the first embodiment covers the second pressure line 21 and is movably mounted on the second pressure line 21, so that the cover 31 transmits the pressure in the pressure line 21 acting on it to the second spiral seal 18, which in turn presses with its sealing surface 19 against the movable scroll support 7. The end of the second pressure line 21 opposite the second spiral seal 18 opens into one of the intermediate chambers 11 in the region of the side wall 27 of the fixed scroll 6, so that, as explained above, pressure can act from the intermediate chamber 11 through the second pressure line 21 via the cover 31 on the second spiral seal 18. Thus, in conclusion, the pressurized line 21 serves to use the pressure from the intermediate chamber 11 to press the second sealing surface 19 of the spiral seal 18 against the movable scroll support 7. The side wall 27 into which the second pressurized line 21 opens is located between the end face 16 of the fixed scroll 6 and the fixed scroll support 5.

[0039] In the first illustrated embodiment, it is shown that the second pressure line 21 can be formed in the fixed scroll 6 in the form of a hole (see in particular FIG. 13). In the example specifically shown in FIG. 13, the pressure line 21 is formed from two holes that open into each other. These holes are arranged relative to each other so that the pressure line 21 has a bent extension in the example of FIG. 13. The bent portion 22 forms a right angle. In other words, as can be clearly seen in FIG. 13, reference is sometimes made to a pressure line 21 having an L-shaped extension.

[0040] It can also be seen in Figure 13 that the pressure line 21 can have a different diameter on one side of the bent portion 22 than on the opposite side. This can be seen in Figure 13 for both diameters 23, 24. In the first embodiment, it is specified that the pressure line 21 has a larger diameter 24 on the side of the bent portion 22 facing the intermediate chamber 11 than on the opposite side.

[0041] FIG. 16 shows a perspective plan view of the second spiral seal 18, inserted into the second seal receiving groove 17, facing away from the second sealing surface 19. The abutment point 26 for the cover 31 of the first embodiment can be seen in FIG. 16. Furthermore, a separator 43 can be seen, which serves to divide the pressurized intermediate space between the second seal receiving groove 17 and the second spiral seal 18 into pressure-technically separated regions. For this purpose, the separator 43 engages in a separator receptacle 42, shown in FIGS. 14 and 15, on the fixed scroll 6. In the first embodiment, the separator 43 is molded integrally with the second spiral seal 18. Naturally, a solution is also possible in which a corresponding separator receptacle is formed on the second spiral seal 18 and the separator is formed as a protrusion in the second seal receiving groove 17.

[0042] Figure 17 shows a cross-sectional view similar to Figure 3 for the first embodiment. Region H shown in Figure 17 is shown in Figure 18. In this Figure, it can again be seen how the fixed scroll 6 is sealed against the movable scroll support 7 by the second spiral seal 18 and its second sealing surface 19. Figure 18 also shows how the movable scroll 8 is in intimate contact with the fixed scroll support 5 by the first spiral seal 14 and its first sealing surface 15, which are located in the first seal receiving groove 13 in the end face 12.

[0043] 19 shows, similarly to FIG. 9, the movable scroll support 7 with the movable scroll 8 and the first seal receiving groove 13 formed in its end face 12. The first spiral seal 14 and the cover 31 arranged therein are also shown in FIG. 19 in an exploded view lifted from the first seal receiving groove 13. The first spiral seal 14 is also formed with a corresponding separator 43, which engages in the corresponding separator receiving portion 42 of the first seal receiving groove 13, thereby achieving the same technical effect as described above for the second spiral seal 18 and the second seal receiving groove 17. The configuration of the first pressurizing line 20 and the resulting technical effect of pressurizing the first spiral seal 14 via the cover 31 correspond to the technical effect achieved in the fixed scroll 6 and described with reference to FIGS. 9 to 15. Therefore, to avoid repetition, reference is made to the above content. 19 also shows an elongated hole 30 in the movable scroll support 7, in which the connecting pin 28 is displaceably supported.

[0044] Figure 20 shows a cross-sectional view similar to Figure 3 of the first embodiment, and Figure 21 shows an enlarged view of the region I shown in Figure 20. Figure 21 clearly shows how the first spiral seal 14, located in the first seal groove 13 in the end face 12 of the movable scroll 8, is in intimate contact with the fixed scroll support 5 with its first seal surface 15. What has been described above for the second seal groove 17 of the fixed scroll 6, the second spiral seal 18 located in this second seal groove 17, and the second pressure line 21 applies analogously to all details of the movable scroll 8.

[0045] 22, it can be seen that the coupling pin 28 is displaceably supported both in the slot 29 of the fixed scroll support 5 and in the slot 30 of the movable scroll support 7. This displaceable support of the common coupling pin 28 in both slots 30, 29, together with the eccentric support of the movable scroll support 7 on the eccentric body 9, results in the desired orbital movement of the movable scroll 8 upon corresponding rotation of the drive shaft 34. During this movement, the coupling pin 28 is displaced both in the slot 29, i.e., in the fixed scroll support 5, and in the slot 30, i.e., in the slot 30 of the movable scroll support 7.

[0046] In plan view, the slots 29, 30 are disposed at an acute angle to each other.

[0047] 23 to 29, a second embodiment of the scroll compressor 1 according to the present invention will be described below. Since this second embodiment is substantially equivalent to the first embodiment, only the differences from the first embodiment will be described. For other points, please refer to the above description of the first embodiment.

[0048] The first notable difference between the first and second embodiments of the present invention is the absence of the cover 31 in the second embodiment shown in FIGS. 23-29. Therefore, the pressure transmitted from the intermediate chamber 11 via the first and second pressure lines 20 and 21 acts directly on the first spiral seal 14 or the second spiral seal 18 in the second embodiment, thereby pressing the first and second seal surfaces 15 and 19 against the corresponding scroll support 5, 7. FIG. 23 also shows the housing-fixed scroll support 5 of the second embodiment, with the second spiral seal 18 removed from the second seal receiving groove 17. FIG. 24 shows a perspective view of the side of the second spiral seal 18 of the second embodiment opposite the second seal surface 19. Because the cover 31 is absent in the second embodiment, the second spiral seal 18 does not have any abutment points 26. The same applies to the first spiral seal 14 shown with the movable scroll support 7 and the movable scroll 8 of the second embodiment. FIG. 26 shows a corresponding vertical cross-section of the scroll compressor 1 of the second embodiment. An enlarged view of the area J shown in FIG. 26 is shown in FIG. 27. In FIG. 27, it is clearly visible how the second spiral seal 18 is arranged in the second seal groove 17 of the fixed scroll 6 and how its sealing surface 19 is in intimate contact with the movable scroll support 7. FIG. 27 also clearly shows how the second pressurizing line 21 of the second embodiment extends directly to the side of the second spiral seal 18 opposite the second sealing surface 19.

[0049] FIG. 28 shows a longitudinal section of the second embodiment of the scroll compressor 1. The area K shown in FIG. 28 is shown enlarged in FIG. 29. In FIG. 29, it can be seen that the first spiral seal 14, located in the first seal groove 13 at the end face 12 of the movable scroll 8, is in intimate contact with the fixed scroll support 5 of the housing with its first seal surface 15. As mentioned above, the movable scroll 8 also lacks the cover 31, so that the pressure transmitted from the intermediate chamber 11 acts directly on the side of the first spiral seal 14 opposite the first seal surface 15 via the first pressure line 20.

[0050] The spiral seals 14, 18 of the second embodiment are preferably inserts which are first manufactured separately and then inserted into the corresponding seal receiving grooves 13, 17.

[0051] 1 to 22, the spiral seals 14, 18 may also be fitted members. However, in the first embodiment, the spiral seals 14, 18 may also be formed as injection-molded or 3D-printed parts by injection-molding or printing the spiral seals 14, 18 directly into the seal receiving grooves 13, 17 based on the cover 31. [Explanation of symbols]

[0052] 1 Scroll compressor 2 Compressor housing 3 Fluid inlet opening 4 Fluid outflow opening 5. Scroll support fixed to housing 6 Housing Fixed Scroll 7 Movable scroll support 8 Movable Scroll 9 Eccentric body 10 fluid flow path 11 Intermediate Room 12 End face 13 First seal receiving groove 14 First spiral seal 15 First sealing surface 16 End face 17 Second seal receiving groove 18 Second spiral seal 19 Second sealing surface 20 First pressurized pipe 21 Second pressurized pipeline 22 Bending section 23 diameter 24 diameter 25 Seal ring 26 Assignment Points 27 Side wall 28 connecting pin 29 slotted hole 30 slots 31 Cover 32 Housing part 33 Housing part 34 Drive shaft 35 screws 36 Overpressure valve 37 Closure pin 38 Compression spring 39 Bearings 40 retaining ring 41 Support 42 Separator housing 43 Separate body

Claims

1. A scroll compressor (1) for compressing a fluid, in particular a gas, has a compressor housing (2) with a fluid inlet opening (3) and a fluid outlet opening (4), in which a fixed scroll support (5) with a fixed scroll (6) is permanently arranged and a movable scroll support (7) with a movable scroll (8) is movably arranged, the movable scroll (8) being drivable by an eccentric body (9) of the scroll compressor (1), a fluid flow path (10) extending from the fluid inlet opening (3) through a plurality of intermediate chambers (11) between the scrolls (6, 8) to the fluid outlet opening (4) for compressing the fluid, and a first seal receiving groove (13) in which a first spiral seal (14) is arranged on an end face (12) of the movable scroll (8) facing away from the movable scroll support (7). The movable scroll (8) is in contact with the fixed scroll support (5) of the housing by a first seal surface (15) of the first spiral seal (14), and the fixed scroll (6) of the housing has an end surface (16) facing away from the fixed scroll support (5) of the housing, which has a second seal receiving groove (17) in which a second spiral seal (18) is disposed. a second seal surface (19) of the second spiral seal (18) contacting the movable scroll support (7); a plurality of first pressurized lines (20) extending from the intermediate chamber (11) through the movable scroll (8) to the first seal receiving groove (13); and a plurality of second pressurized lines (21) extending from the intermediate chamber (11) through the housing fixed scroll (6) to the second seal receiving groove (17). The scroll compressor (1) is characterized in that the first pressurized conduit (20) opens into the first seal receiving groove (13) on a side of the first spiral seal (14) opposite the first seal surface (15), and the second pressurized conduit (21) opens into the second seal receiving groove (17) on a side of the second spiral seal (18) opposite the second seal surface (19).

2. 2. The scroll compressor (1) according to claim 1, wherein the first pressurizing lines (20) are each formed as at least one hole provided in the movable scroll (8), and the second pressurizing lines (21) are each formed as at least one hole provided in the fixed scroll (6).

3. 3. The scroll compressor (1) according to claim 1 or 2, characterized in that the first pressurization line (20) and the second pressurization line (21) each have a bent, preferably L-shaped extension.

4. 4. The scroll compressor (1) according to claim 3, wherein the first pressurized line (20) and the second pressurized line (21) each have a different diameter (23, 24) on one side of the bent portion (22) in the extension from the opposite side.

5. 4. The scroll compressor (1) according to claim 3, wherein the first pressurizing line (20) and the second pressurizing line (21) each have a larger diameter (24) on the side of the bent portion (22) in the extension facing the respective intermediate chamber (11) than on the side opposite thereto.

6. The scroll compressor (1) according to any one of claims 1 to 5, characterized in that the scroll compressor (1) has a connecting pin (28), which is displaceably supported in an elongated hole (29) provided in the scroll support (5) fixed to the housing and which is displaceably supported in an elongated hole (30) provided in the movable scroll support (7).

7. 7. A scroll compressor (1) according to claim 6, characterized in that the slots (29, 30) are arranged at an acute angle to each other when viewed in plan.

8. 8. The scroll compressor (1) according to claim 1, wherein a cover (31) is arranged in the first seal receiving groove (13) between the first spiral seal (14) arranged in the first seal receiving groove (13) and the first pressurizing line (20) opening into the first seal receiving groove (13), covering each of the first pressurizing lines (20); and a cover (31) is arranged in the second seal receiving groove (17) between the second spiral seal (18) arranged in the second seal receiving groove (17) and the second pressurizing line (21) opening into the second seal receiving groove (17), covering each of the second pressurizing lines (21).

9. 9. The scroll compressor (1) according to claim 1, wherein the first spiral seal (14) is formed as a fitting member and is fitted into the first seal receiving groove (13), and the second spiral seal (18) is formed as a fitting member and is fitted into the second seal receiving groove (17).

10. 9. The scroll compressor (1) according to claim 1, wherein the first spiral seal (14) is injection molded into the first seal receiving groove (13) as an injection molded part or printed as a 3D printed part, and / or the second spiral seal (18) is injection molded into the second seal receiving groove (17) as an injection molded part or printed as a 3D printed part.

Images