Scroll compressor

Abstract

The invention relates to a scroll compressor (1) for compressing a fluid, the scroll compressor (1) comprising: a compressor housing (2) having a fluid-inlet opening (3) and a fluid-outlet opening (4); a scroll carrier (5) which is fixed to the housing and has a scroll (6) which is fixed to the housing; and a movable scroll carrier (7) having a movable scroll (8), wherein, for the purpose of compressing the fluid, a fluid flow channel (10) leads from the fluid-inlet opening (3) through gaps (11) between the scrolls (6, 8) to the fluid-outlet opening (4), and a first seal-accommodating groove (13) is formed in the movable scroll (8), with a first helical seal (14) having a first sealing face (15) being arranged in the first groove, and a second seal-accommodating groove (17) is formed in the scroll (6) which is fixed to the housing, with a second helical seal (18) having a second sealing face (19) being arranged in the second groove, and wherein pressurization lines (20, 21) open into the relevant seal-accommodating groove (13) on a side of the relevant helical seal (14, 18) that is opposite the relevant sealing face (15, 19).

Description

[0001]

[0002] Scroll compressor

[0003] The invention relates to a scroll compressor for compressing a fluid, in particular a gas, wherein the scroll compressor has a compressor housing with a fluid inlet and a fluid outlet, and a housing-fixed scroll carrier with a housing-fixed scroll is arranged stationary in the compressor housing and a movable scroll carrier with a movable scroll is arranged movably in the compressor housing and the movable scroll is drivable by means of an eccentric of the scroll compressor, wherein for compressing the fluid, a fluid flow channel leads from the fluid inlet through spaces between the scrolls to the fluid outlet, and a first seal receiving groove with a first spiral seal arranged therein is formed in an end face of the movable scroll facing away from the movable scroll carrier,wherein the movable scroll rests against the housing-fixed scroll carrier with a first sealing surface of the first spiral seal, and a second seal receiving groove with a second spiral seal arranged therein is formed in an end face of the housing-fixed scroll facing away from the housing-fixed scroll carrier, wherein the housing-fixed scroll rests against the movable scroll carrier with a second sealing surface of the second spiral seal, and wherein first pressurization lines lead from the intermediate spaces through the movable scroll into the first seal receiving groove and second pressurization lines lead from the intermediate spaces through the housing-fixed scroll into the second seal receiving groove.

[0004] Such scroll compressors are known in the state of the art. They are also often referred to as scroll compressors. CN 109058111 A represents the state of the art in this category.

[0005] In this case, the pressurization line opens laterally into the seal receiving groove. Whether or not the pressurization line is covered by the spiral seal depends on the position of the spiral seal in the seal receiving groove.

[0006] The object of the invention is to improve a scroll compressor of the type mentioned at the beginning.

[0007] For this purpose, the invention proposes that the first pressurization lines open into the first seal receiving groove on a side of the first spiral seal opposite the first sealing surface and that the second pressurization lines open into the second seal receiving groove on a side of the second spiral seal opposite the second sealing surface.

[0008] A significant advantage of the fact that the respective pressurization lines open into the respective seal receiving groove on the side of the respective spiral seal opposite the respective sealing surface is that the spiral seal can be pressurized via the respective pressurization line on its side opposite the sealing surface, regardless of its position in the seal receiving groove. In contrast to the prior art mentioned at the beginning, it cannot happen that the respective spiral seal covers or closes the respective pressurization line in such a way that pressurization via the pressurization line is prevented. A further advantage of the invention is that the respective spiral seal can be installed pre-tensioned in the respective seal receiving groove even in the at-rest state.In addition, the invention allows the spiral seal to be automatically readjusted throughout its entire life cycle, even in the event of wear, since it is always ensured that the respective spiral seal can be subjected to pressure on the side opposite the respective sealing surface.

[0009] Preferably, the respective pressurization line opens at its end opposite the respective seal receiving groove in the region of a side wall of the respective spiral, which faces a gap between the spirals and is arranged between the respective end face of the respective spiral and the respective spiral carrier of the respective spiral. This applies both to the movable spiral with its movable spiral carrier and the end face facing away from the movable spiral carrier and the first seal receiving groove arranged there, as well as to the housing-fixed spiral with the housing-fixed spiral carrier and the end face facing away from the housing-fixed spiral carrier and the second seal receiving groove arranged there.

[0010] Spiral compressors according to the invention can also be referred to as scroll compressors. They are primarily used to compress gas, whereby the term "gas" also includes mixtures of different gases. However, the fluid to be compressed by the spiral compressor according to the invention can also be a medium that has both gaseous and liquid phases. An example of this is transcritical carbon dioxide.

[0011] Preferred variants of the invention provide that the first pressurization lines are each designed as at least one bore in the movable spiral and the second pressurization lines are each designed as at least one bore in the spiral fixed to the housing.

[0012] It is also advantageous if the first pressurization lines and the second pressurization lines each have an angled, preferably L-shaped, path. In particular, this can be a path angled at an orthogonal angle.

[0013] In principle, it can be provided that the respective pressurization lines have the same diameter on both sides of the bend. However, it can also be provided that the first pressurization lines and the second pressurization lines each have a different diameter on one side of a bend than on the opposite side. One possible embodiment provides, for example, that the first pressurization lines and the second

[0014] Pressurization lines each have a larger diameter on a side of a bend facing the respective intermediate space than on the opposite side. In order to move the movable scroll in the desired manner, particularly preferred embodiments of the invention provide that the scroll compressor has a connecting bolt which is displaceably mounted in an elongated hole in the scroll support fixed to the housing and is displaceably mounted in an elongated hole in the movable scroll support. In this case, it is advantageously provided that the elongated holes are arranged at an acute angle to one another, as seen in a plan view. The interaction of the connecting bolt guided in the elongated holes with the eccentric which drives the movable scroll ensures that the movable scroll is moved in an orbiting manner in the compressor housing and thus also in the scroll fixed to the housing.In this case, one could also refer to the movable scroll as an orbiting scroll, and the movable scroll carrier as an orbiting scroll carrier. The eccentric is conveniently mounted eccentrically on a drive shaft, which, through its rotation around its longitudinal axis, causes a corresponding eccentric movement of the eccentric and thus the corresponding movement of the movable scroll. The scroll compressor's own motors, as well as external motors or other drives, can be connected to this drive shaft. Of course, it would also be conceivable to drive the eccentric directly without a corresponding drive shaft.

[0015] A first group of scroll compressors according to the invention provides that a cover covering the respective first pressurization line is arranged in the first seal receiving groove between the first spiral seal arranged therein and the first pressurization lines opening into the first seal receiving groove, and a cover covering the respective second pressurization line is arranged in the second seal receiving groove between the second spiral seal arranged therein and the second pressurization lines opening into the second seal receiving groove. These covers covering the respective pressurization line are advantageously movably mounted on or in the pressurization line, so that pressure present in the respective pressurization line can be transmitted via them to the corresponding spiral seal.One could also say that the covering lids are only placed on the pressurization line or are only loosely inserted into it.

[0016] In other embodiments of the invention, however, these covering lids can be omitted entirely. This is possible, for example, if the first spiral seal is designed as an insert and inserted into the first seal receiving groove, and the second spiral seal is designed as an insert and inserted into the second seal receiving groove.

[0017] Alternatively, it is also possible for the first spiral seal to be injection-molded into the first seal receiving groove or printed as a 3D-printed part, and / or for the second spiral seal to be injection-molded or printed as a 3D-printed part into the second seal receiving groove. In this case, in which the respective spiral seal is injected or printed into the respective seal groove, the covers can prevent material from the respective spiral seal from inadvertently penetrating the respective pressurization line during the injection-molding or 3D-printing process.

[0018] Both the first spiral seal and the second spiral seal are advantageously made of a polymer or a polymer with a dry lubricant and / or reinforcing fibers. Suitable polymers include polyetheretherketone, polyamideimide, polyoxymethylene, polyketone, polyamide, or even polyethylene terephthalate. Suitable dry lubricants include polytetrafluoroethylene or molypdene disulphite. Suitable reinforcing fibers include glass fibers or carbon fibers.

[0019] The housing-fixed scroll carrier with the housing-fixed scroll, as well as the movable scroll carrier with the movable scroll, and also the various components of the compressor housing can preferably each have a base body made of an aluminum alloy or cast iron. A coating is preferably applied to this base body. The coating can be, for example, a nickel-phosphorus layer, an aluminum oxide layer, or a dry-lubricating anti-friction coating. A combination of at least two of these layers is also possible. These coatings can be applied directly to the respective base body. However, the base body can also have an open-pore adhesive layer to which the coating is then applied.

[0020] For a base body made of an aluminum alloy, the bonding layer can be an open-pore aluminum oxide layer, such as anodized aluminum or compacted hard anodized aluminum. Another variant of a carrier or compacting layer consists of an open-pore plasma-chemically oxidized aluminum layer. For base bodies made of cast iron, the carrier or bonding layers can be formed, for example, by phosphating or sandblasting.

[0021] Unless misleading, the terms "a" and "an" used here should also be understood to mean "at least one" and "at least one." The terms "first" and "second" in the terms seal receiving groove, spiral seal, sealing surface, and pressurization line, etc., serve purely for differentiation and have no other deeper meaning. They could also be used interchangeably.

[0022] Further features and details of preferred embodiments of the invention are explained by way of example in the following description of the figures using various embodiments of the invention. They show:

[0023] Fig. 1 to 22 are representations of a first embodiment of a scroll compressor according to the invention;

[0024] Fig. 23 to 29 representations of a second embodiment of a scroll compressor according to the invention

[0025] Fig. 1 shows the first embodiment of a scroll compressor 1 according to the invention in a side view of the compressor housing 2, which in this example is composed of three housing parts 5, 32 and 33. In both embodiments, the housing-fixed spiral carrier is integrated into the housing part 5, so that this housing part will be referred to from now on as the housing-fixed spiral carrier 5. The housing-fixed spiral carrier 5 with the housing-fixed spiral 6 could, however, also be manufactured initially as a separate part and then arranged stationary in the compressor housing 2. The drive shaft 34 protrudes from the underside of the compressor housing 2. Any rotary drive, such as an electric motor or the like, can be connected to this drive shaft 34 in order to move the movable spiral carrier 7 with the movable spiral 8 within the compressor housing 2 in the manner described in more detail below.

[0026] In Fig. 1 one can also see the fluid inlet opening 3 in the area of ​​the spiral carrier 5 fixed to the housing as well as the fluid outlet opening 4 leading out of the compressor housing 2 at the top.

[0027] Fig. 2 shows a top view of the scroll compressor 1 of this first embodiment. In addition to the parts already mentioned, the screws 35 with which the housing-fixed scroll carrier 5 is attached to the housing part 32 are also visible. Section line AA is also shown in Fig. 2. The vertical section along this section line AA through the scroll compressor 1 according to Fig. 2 can be seen in Fig. 3.

[0028] Looking at Fig. 3, one can see the housing-fixed scroll carrier 5 with the housing-fixed spiral 6. Both are arranged stationary in the compressor housing 2. One also sees the movable scroll carrier 7 with the movable spiral 8.

[0029] These two parts are movably arranged in the compressor housing 2. In this embodiment, the movable scroll 8 is driven together with the movable scroll carrier 7 by means of an eccentric 9. This eccentric 9 is seated eccentrically on the drive shaft 34. The drive shaft 34 extends through both the housing part 32 and the housing part 33 and is rotatably mounted there by corresponding bearings 39, which are designed as ball bearings here. The snap ring 40 holds one of the bearings 39 in the housing part 32.

[0030] The eccentric 9 engages the movable spiral carrier 7 by means of a bearing 39, which here is also designed as a ball bearing. The movable spiral carrier 7, together with the movable spiral 8, is arranged in a corresponding free space in both the housing part 32 and the housing-fixed spiral carrier 5 and is movably mounted there by means of the eccentric 9 or the drive shaft 34. The sealing ring 25 ensures a corresponding seal against the housing part 32.

[0031] To compress the fluid, a fluid flow channel 10 leads from the fluid inlet opening 3 through spaces 11 between the spirals 6 and 8 to the fluid outlet opening 4 arranged centrally above the spiral carrier 5 fixed to the housing.

[0032] In preferred embodiments, as shown here, a pressure relief valve 36 is located in the area of ​​the fluid outlet opening 4. This valve only opens when the fluid compressed between the spirals 6 and 8 is at a sufficiently high pressure. When the pressure relief valve 36 is open, the correspondingly compressed fluid can flow out through the fluid outlet opening 4.

[0033] Specifically, this pressure relief valve 36 in this

[0034] embodiment has a locking pin 37, which

[0035] Fluid flow channel 10 can be closed accordingly. This closure pin 37 is supported by a compression spring 38 on the support body 41, which is fixedly connected to the compressor housing 2. The compression spring 38 preloads the closure pin 37 towards the closed position of the pressure relief valve 36. By selecting an appropriate compression spring 38, the pressure threshold value above which the pressure relief valve 36 opens can be set. Of course, differently designed pressure relief valves 36 could also be used at this point. The variant shown here is, of course, only an example.

[0036] In the end face 12 of the movable scroll 8 facing away from the movable scroll carrier 7, there is a first seal receiving groove 13 with a first spiral seal 14 arranged therein. The movable scroll 8 rests against the housing-fixed scroll carrier 5 with a first sealing surface 15 of the first spiral seal 14. The movable scroll 8 bears against the housing-fixed scroll carrier 5. The movable scroll carrier 7 of this first embodiment is shown separately in Fig. 19.

[0037] A second seal receiving groove 17 with a second spiral seal 18 arranged therein is formed in an end face 16 of the housing-fixed spiral 6 facing away from the housing-fixed spiral carrier 5. The housing-fixed spiral 6 rests with a second sealing surface 19 of the second spiral seal 18 on the movable spiral carrier 7. The housing-fixed spiral carrier 5 of this first embodiment is shown separately in Fig. 9. The spiral seals 14 and 18 with their

[0038] Sealing surfaces 15 and 19 ensure a corresponding seal of the respective spirals 6 and 8 against the other spiral supports 5 and 7. In order to press the spiral seals 14 and 18 with their respective sealing surfaces 15 and 19 against the corresponding spiral supports 5 and 7, they are subjected to pressure from the intermediate spaces 11. For this purpose, first pressure lines 20 lead from the intermediate spaces 11 through the movable spiral 8 into the first seal receiving groove 13. Second

[0039] Pressurization lines 21 lead accordingly from the intermediate spaces 11 through the housing-fixed spiral 6 into the second seal receiving groove 17. According to the invention, it is provided that the first pressurization lines 20 open into the first seal receiving groove 13 on a side of the first spiral seal 14 opposite the first sealing surface 15 and the second pressurization lines 21 open into the second seal receiving groove 17 on a side of the second spiral seal 18 opposite the second sealing surface 19.

[0040] The route of the pressurization lines 20 and 21 will be explained in more detail later.

[0041] Fig. 4 shows an exploded view of the individual parts of the scroll compressor 1 of this first embodiment.

[0042] To compress the fluid, the movable spiral 8 with the movable spiral carrier 7 performs a so-called orbiting movement in a manner known per se in the prior art, which is caused by the interaction of the movement of the eccentric 9 with the connection of the movable spiral carrier 7 via the connecting bolt 28 to the housing-fixed spiral carrier 5, as described further below. Due to this orbiting movement of the movable spiral 8, the spaces 11 between the housing-fixed spiral 6 and the movable spiral 8 change continuously in such a way that fluid sucked in via the fluid inlet opening 3 is transported along the fluid flow channel 10 in the spaces 11 between the spirals 6 and 8 and is simultaneously compressed, so that in the compressed state it can flow out of the central area between the spirals 6 and 8 when the pressure relief valve 36 is opened accordingly through the fluid outlet opening 4.

[0043] Figs. 5 to 8 each show horizontal sections through the housing-fixed scroll carrier 5 and the scrolls 6 and 8 along section line BB of Fig. 3. Figs. 5 to 8 depict various relative positions between the scrolls 6 and 8 in the form of snapshots of the orbiting motion. Since this type of fluid compression using corresponding scroll compressors 1 is known per se, it requires no further explanation.

[0044] Figs. 9 to 15 show various representations of the housing-mounted spiral carrier 5 with the housing-mounted spiral and the first spiral seal 14 of this first embodiment. Fig. 9 shows a perspective view obliquely from below of the housing-mounted spiral carrier 5, wherein the second spiral seal 18 and the covers 31, explained further below, are shown exploded from the housing-mounted spiral carrier 5. Fig. 10 shows a view from below of the spiral carrier 5 fixed to the housing. Fig. 11 shows the section along the section line CC from Fig. 10, Fig. 12 the section along the section line DD from Fig. 10, Fig. 13 the area G from Fig. 12 enlarged and Fig. 14 a section along the section line EE from Fig. 10. Fig. 15 shows the detail F from Fig. 10 enlarged and Fig. 16 a view of the second spiral seal 18 detached from the spiral carrier 5 fixed to the housing.

[0045] In the sections along the section lines CC and DD in Fig. 11 and 12, one can clearly see how the second spiral seal 18 is arranged in the second seal receiving groove 17 of the housing-fixed spiral 6. The second sealing surface of the second spiral seal 18 points out of the second seal receiving groove 17 so that it can bear sealingly against the movable spiral carrier 7 in the manner already shown in Fig. 3. In Fig. 13 one can see, on an enlarged scale, how the second pressurization line 21 opens into the second seal receiving groove 17 on a side of the second spiral seal 18 opposite the second sealing surface 19.In the area of ​​this opening, in this first exemplary embodiment, a mushroom-shaped cover 31 is arranged, which covers the second pressurisation line 21 and rests movably on it, such that the cover 31 transfers the pressure acting on it in the pressurisation line 21 to the second spiral seal 18, in order to press the latter with its sealing surface 19 against the movable spiral carrier 7. With its end opposite the second spiral seal 18, the second pressurisation line 21 opens into one of the intermediate spaces 11 in the area of ​​a side wall 27 of the spiral 6 fixed to the housing, such that pressure from the intermediate space 11 can act through the second pressurisation line 21 via the cover 31 onto the second spiral seal 18 in the manner described.The pressurization line 21 thus serves to utilize the pressure from the intermediate space 11 to press the spiral seal 18 with its second sealing surface 19 against the movable spiral carrier 7. The side wall 27, into which the second pressurization line 21 opens, is located between the end face 16 of the housing-fixed spiral 6 and the housing-fixed spiral carrier 5.

[0046] This example shows that the second pressurization line 21 can be designed in the form of bores in the housing-fixed spiral 6, see in particular Fig. 13. In the specific example shown here, the pressurization line 21 is formed from two bores that open into one another. These are arranged relative to one another such that the pressurization line 21, in this example, has an angled path. The angle 22 forms a right angle. One can therefore also speak of a pressurization line 21 with an L-shaped course, as can be clearly seen in Fig. 13.

[0047] Fig. 13 also clearly shows that the pressurization line 21 can have a different diameter on one side of the bend 22 than on the opposite side. This is clearly visible in Fig. 13 from the two diameters 23 and 24. In this exemplary embodiment, the pressurization line 21 has a larger diameter 24 on the side of the bend 22 facing the intermediate space 11 than on the opposite side.

[0048] Fig. 16 shows a perspective top view obliquely from above of the side of the second spiral seal 18 opposite the second sealing surface 19, with which the seal is inserted into the second seal receiving groove 17. The attachment points 26 for the covers 31 of this exemplary embodiment can be seen here. Also visible are the separating bodies 43, which serve to divide the pressurized space between the second seal receiving groove 17 and the second spiral seal 18 into pressure-technically separated areas. For this purpose, the separating bodies 43 engage in the separating body receptacles 42 shown in Figs. 14 and 15 in the spiral 6 fixed to the housing. In this exemplary embodiment, the separating bodies 43 are formed on the second spiral seal 18. Of course, a solution the other way around is also conceivable, in which corresponding separating body receptacles are provided on the second spiral seal

[0049] 18 and the separating bodies are formed as projections in the second seal receiving groove 17.

[0050] Fig. 17 shows a sectional view of the first embodiment analogous to Fig. 3. The area H from Fig. 17 is shown in Fig. 18. Here it can be seen again how the housing-fixed spiral 6 by means of the second spiral seal 18 and its second sealing surfaces

[0051] 19 is sealed against the movable spiral carrier 7. In addition, Fig. 18 also shows how the movable spiral 8 is connected to the seal receiving groove 13 in the front face

[0052] 12 arranged first spiral seal 14 and whose first sealing surface 15 seals against the housing-fixed spiral carrier 5.

[0053] Fig. 19 now shows, in an analogous representation to Fig. 9, the movable spiral carrier 7 with the movable spiral 8 and the first seal receiving groove 13 formed in its end face 12. The first spiral seal 14 arranged there and the covers 31 are again shown in Fig. 19 as being explosively protruding from the first seal receiving groove

[0054] 13 is shown in a highlighted position. On the first spiral seal 14, corresponding separating bodies 43 are again formed, which in turn engage in corresponding separating body receptacles 42 of the first seal receptacle groove 13, thus achieving the same technical effect as described above for the second spiral seal 18 and the second seal receptacle groove 17. The design of the first pressurization line 20 and its technical effect of pressurizing the first spiral seal 14 via the cover 31 also corresponds to how this was implemented in the housing-fixed spiral 6 and explained with reference to Figs. 9 to 15, so that to avoid repetition, reference is made by analogy to what has been described above. Fig. 19 also shows the elongated hole 30 in the movable spiral carrier 7, in which the connecting bolt 28 is slidably mounted.

[0055] Fig. 20 shows a section through the first exemplary embodiment analogous to Fig. 3, and Fig. 21 shows area I from Fig. 20 on an enlarged scale. In Fig. 21, it can once again be clearly seen how the first spiral-shaped seal 14, arranged in the end faces 12 of the movable spiral 8 in the first seal receiving groove 13 provided there, rests with its first sealing surfaces 15 on the spiral carrier 5 fixed to the housing in a sealing manner. For all details, the above-mentioned information regarding the housing-fixed spiral 6 with its second seal receiving groove 17 and the second spiral-shaped seal 18 arranged therein and the second pressurization line 21 applies analogously to the movable spiral 8.

[0056] In the perspective section through the first embodiment of the scroll compressor 1 according to Fig. 22, it can be seen how the connecting bolt 28 is displaceably mounted both in the elongated hole 29 of the housing-fixed scroll carrier 5 and in the elongated hole 30 of the movable scroll carrier 7. The interaction of this displaceable mounting of the common connecting bolt 28 in the two elongated holes 30 and 29 with the eccentric mounting of the movable scroll carrier 7 on the eccentric 9 and the corresponding rotation of the drive shaft 34 creates the desired orbiting movement of the movable scroll 8. During this movement, the connecting bolt 28 is displaced both in the elongated hole 29, i.e. in the housing-fixed scroll carrier 5, and in the elongated hole 30, i.e. in the movable scroll carrier 7.

[0057] Seen in a plan view, the elongated holes 29 and 30 are arranged at an acute angle relative to each other.

[0058] A second embodiment of a scroll compressor 1 according to the invention will now be explained with reference to Figs. 23 to 29. This largely corresponds to the first embodiment, so only the differences from the first embodiment will be discussed. Otherwise, reference is made to the above descriptions of the first embodiment.

[0059] A first significant difference between the first and second embodiments of the invention is that in the second embodiment according to Figs. 23 to 29, no covers 31 are present. The pressure transmitted from the intermediate spaces 11 via the first pressurisation line 20 and the second pressurisation line 21 therefore acts in this second embodiment directly on the first spiral seal 14 and the second spiral seal 18, respectively, in order to press these with their first and second sealing surfaces 15 and 19 against the corresponding spiral carriers 5 and 7. Fig. 23 again shows a view of the housing-fixed spiral carrier 5 of this second embodiment, wherein the second spiral seal 18 is shown removed from the second seal receiving groove 17.Fig. 24 shows the second spiral seal 18 of this second embodiment in a perspective view of the side opposite the second sealing surface 19. Since there are no covers 31 in this embodiment, there are also no attachment points 26 on the second spiral seal 18. The same applies to the first spiral seal 14 shown together with the movable scroll carrier 7 and the movable scroll 8 of this second embodiment. Fig. 26 shows a corresponding vertical section through the scroll compressor 1 of this second embodiment. The enlarged area J from Fig. 26 is shown in Fig. 27. Here it can be clearly seen how the second spiral seal 18 is arranged in the second seal receiving groove 17 of the scroll 6 fixed to the housing and how its sealing surface 19 bears sealingly against the movable scroll carrier 7. Fig.27 also shows well how the second pressurization line 21 of this embodiment leads directly to the side of the second spiral seal 18 opposite the second sealing surface 19.

[0060] Fig. 28 once again shows a longitudinal section through the second embodiment of the scroll compressor 1. The area K marked there is shown enlarged in Fig. 29. Here one can see how the first spiral-shaped seal 14, which is arranged in the end faces 12 of the movable scroll 8 in the first seal receiving groove 13, rests with its first sealing surface 15 sealingly against the scroll carrier 5 fixed to the housing. Here too, as already mentioned, the covers 31 are missing, so that the pressure transmitted from the intermediate spaces 11 acts via the first pressurization line 20 directly on the side of the first spiral-shaped seal 14 opposite the first sealing surface 15.

[0061] The spiral seals 14 and 18 of this second embodiment are preferably inserts which are first manufactured separately and then inserted into the corresponding seal receiving grooves 13 and 17.

[0062] In the first embodiment of the scroll compressor according to the invention, as shown in Figs. 1 to 22, the spiral seals 14 and 18 can also be such inserts. However, in this first embodiment, due to the covers 31, it is also possible to design the spiral seals 14 and 18 as injection-molded parts or as 3D-printed parts by injecting or pressing them directly into the respective seal receiving grooves 13 and 17.

[0063] Key to the reference numbers:

[0064] Scroll compressor 21 second compressor housing pressurization

[0065] Fluid inlet line Fluid outlet 22 Angle fixed to the housing 23 Diameter

[0066] Spiral carrier 24 Diameter of housing-fixed spiral 25 Sealing ring of movable spiral carrier 26 Starting point of movable spiral 27 Side wall eccentric 28 Connecting bolt

[0067] Fluid flow channel 29 Slotted hole Intermediate space 30 Slotted hole

[0068] Front face 31 Cover first 32 Housing part

[0069] Seal receiving groove 33 Housing part first spiral seal 34 Drive shaft seal 35 Screw first sealing surface 36 Pressure relief valve face 37 Locking pin second 38 Compression spring

[0070] Seal receiving groove 39 Bearing second spiral seal 40 Snap ring 41 Support body second sealing surface 42 Separator receiving first 43 Separator

[0071] Pressurization line

Claims

A spiral compressor (1) for compressing a fluid, in particular a gas, wherein the spiral compressor (1) has a compressor housing (2) with a fluid inlet opening (3) and a fluid outlet opening (4), and a housing-fixed spiral carrier (5) with a housing-fixed spiral (6) is arranged stationary in the compressor housing (2) and a movable spiral carrier (7) with a movable spiral (8) is arranged movable in the compressor housing (2), and the movable spiral (8) is drivable by means of an eccentric (9) of the spiral compressor (1), wherein for compressing the fluid a fluid flow channel (10) leads from the fluid inlet opening (3) through spaces (11) between the spirals (6, 8) to the fluid outlet opening (4) and in an end face (12) of the movable spiral (8) facing away from the movable spiral carrier (7) a first seal receiving groove (13) is formed with a first spiral seal (14) arranged therein,wherein the movable spiral (8) bears against the housing-fixed spiral carrier (5) with a first sealing surface (15) of the first spiral seal (14), and in an end face (16) of the housing-fixed spiral (6) facing away from the housing-fixed spiral carrier (5), a second seal receiving groove (17) with a second spiral seal (18) arranged therein, is formed, wherein the housing-fixed spiral (6) bears against the movable spiral carrier (7) with a second sealing surface (19) of the second spiral seal (18), and wherein first pressurization lines (20) lead from the intermediate spaces (11) through the movable spiral (8) into the first seal receiving groove (13) and second pressurization lines (21) lead from the intermediate spaces (11) through the housing-fixed spiral (6) into the second seal receiving groove (17), characterized in that the first pressurization lines (20) open into the first seal receiving groove (13) on a side of the first spiral seal (14) opposite the first sealing surface (15) and the second pressurization lines (21) open into the second seal receiving groove (17) on a side of the second spiral seal (18) opposite the second sealing surface (19).Scroll compressor (1) according to claim 1, characterized in that the first pressurization lines (20) are each designed as at least one bore in the movable scroll (8), and the second pressurization lines (21) are each designed as at least one bore in the scroll (6) fixed to the housing. Scroll compressor (1) according to claim 1 or 2, characterized in that the first pressurization lines (20) and the second pressurization lines (21) each have an angled, preferably L-shaped, course. Scroll compressor (1) according to claim 3, characterized in that the first pressurization lines (20) and the second pressurization lines (21) each have a different diameter (23, 24) on one side of a bend (22) than on an opposite side. Scroll compressor (1) according to claim 3, characterized in that the first pressurization lines (20) and the second pressurization lines (21) each have a larger diameter (24) on a side of a bend (22) facing the respective intermediate space (11) than on an opposite side. Scroll compressor (1) according to one of claims 1 to 5, characterized in that the scroll compressor (1) has a connecting bolt (28) which is displaceably mounted in an elongated hole (29) in the housing-fixed scroll carrier (5) and is displaceably mounted in an elongated hole (30) in the movable scroll carrier (7).Scroll compressor (1) according to claim 6, characterized in that the elongated holes (29, 30), viewed in plan view, are arranged at an acute angle relative to one another. Scroll compressor (1) according to one of claims 1 to 7, characterized in that in the first seal receiving groove (13) between the first spiral seal (14) arranged therein and. A cover (31) covering the respective first pressurization line (20) is arranged between the first pressurization lines (20) opening into the first seal receiving groove (13), and a cover (31) covering the respective second pressurization line (21) is arranged in the second seal receiving groove (17) between the second spiral seal (18) arranged therein and the second pressurization lines (21) opening into the second seal receiving groove (17). Scroll compressor (1) according to one of claims 1 to 8, characterized in that the first spiral seal (14) is designed as an insert and is inserted into the first seal receiving groove (13), and the second spiral seal (18) is designed as an insert and is inserted into the second seal receiving groove (17).Scroll compressor (1) according to one of claims 1 to 8, characterized in that the first spiral seal (14) is injected into the first seal receiving groove (13) as an injection-molded part or is printed as a 3D-printed part, and / or that the second spiral seal (18) is injected into the second seal receiving groove (17) as an injection-molded part or is printed as a 3D-printed part.

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