Abstract
A scroll plate for use in a scroll compressor is described. The scroll plate comprises a base plate having a first side and a second side, wherein the second side opposes the first side, and a spiral wrap formed on the first side of the base plate, wherein the base plate comprises one or more recesses and wherein an insulating material is located in at least one of the one or more recesses. Further, a scroll compressor having a corresponding scroll plate is described.
Claims
1. A scroll plate for use in a scroll compressor, the scroll plate comprising: a base plate having a first side and a second side, wherein the second side opposes the first side; and a spiral wrap formed on the first side of the base plate; wherein the base plate comprises one or more recesses and wherein an insulating material is located in at least one of the one or more recesses.
2. The scroll plate according to claim 1, wherein at least one of the one or more recesses is located at a surface of the second side of the base plate.
3. The scroll plate according to claim 1, wherein the second side of the base plate further comprises a reception configured to receive a portion of a crankshaft of the compressor.
4. The scroll plate according to claim 3, wherein at least one recess of the one or more recesses is located within the reception.
5. The scroll plate according to claim 3, wherein at least one recess of the one or more recesses is located outside of the reception.
6. The scroll plate according to claim 5, wherein the at least one recess, which is located outside of the reception, forms a ring around the reception.
7. The scroll plate according to claim 6, wherein at least two recesses form concentric rings around the reception.
8. The scroll plate according to claim 1, wherein at least one recess of the one or more recesses is located beneath the surface of the second side of the base plate.
9. The scroll plate according to claim 8, wherein the at least one recess beneath the surface of the second side is formed as a sealed chamber within the base plate.
10. The scroll plate according to claim 9, wherein the insulating material located in the recess beneath the surface of the second side is a fluid.
11. The scroll plate according to claim 1, wherein the insulating material forms a layer located between the first side and the second side of the base plate.
12. The scroll plate according to claim 1, wherein the insulating material is a non-metal material having a low thermal conductivity.
13. A scroll compressor comprising a scroll plate according to claim 1.
14. The scroll compressor according to claim 13, wherein the scroll plate is an orbiting scroll plate and wherein the one or more recesses of the base plate of the orbiting scroll plate are referred to as one or more first recesses, the scroll compressor further comprising a second scroll plate, wherein the second scroll plate comprises: a second base plate having a frontside and a backside, wherein the backside opposes the frontside; a second spiral wrap formed at the frontside of the second base plate, wherein the second spiral wrap is adapted to interact with the spiral wrap of the orbiting scroll plate to form at least one compression chamber; an injection channel formed within the second base plate, the injection channel providing an injection path for injection of fluid into the at least one compression chamber; a second recess located at the backside of the second base plate; an insert placed within the second recess, wherein the insert forms a cooling chamber within the second recess, an inlet channel via which the cooling chamber is connected to the injection channel; and an outlet channel via which the cooling chamber is connected to the inside of the second spiral wrap.
15. The scroll compressor according to claim 14, wherein the cooling chamber, the inlet channel and the outlet channel define a cooling path configured to guide fluid from the injection channel to the inside of the spiral wrap.
Description
DRAWINGS
[0040] In the following description, various embodiments of the invention are described with reference to the following drawings, in which:
[0041] FIG. 1 shows a cross-sectional view of an embodiment of a scroll compressor with an orbiting scroll plate according to the current invention, wherein the scroll compressor has a low-pressure and high-pressure configuration.
[0042] FIG. 2 shows a highlighted portion of the upper portion of the scroll compressor of FIG. 1 and illustrates the temperature areas within the scroll compressor.
[0043] FIGS. 3a-3d show cross-sectional views of some embodiments of a scroll plate according to the current invention.
[0044] FIGS. 4a-4c show embodiment examples of orbiting scroll plates according to the current invention, wherein (a) is a perspective view of an embodiment example of an orbiting scroll plate cut in half and (b), (c) are top views of the backside of orbiting scroll plates with different designs of insulating material.
[0045] FIGS. 5a, 5b show another embodiment example of an orbiting scroll plate according to the current invention, wherein the base plate consists of two separate parts, wherein the first part comprises the first side and the second part comprises the second side and wherein the insulating material is placed between the first part and the second part. (a) is a perspective view of said embodiment example of an orbiting scroll plate cut in half and (b) is an exploded view of the orbiting scroll plate according to said embodiment.
[0046] FIGS. 6a-6c show other embodiments of a scroll compressor in which the current invention can be used, wherein the scroll compressor has a so-called high-side compressor configuration. (a) shows a cross-sectional view of a scroll compressor with thermal deformation management features added to the orbiting scroll plate, (b) shows a highlighted portion of the upper portion of the scroll compressor of (a) and illustrates the temperature areas within the scroll compressor, and (c) shows a cross-sectional view of a scroll compressor with thermal deformation management features added to the stationary scroll plate.
[0047] FIG. 7 shows a cross-sectional view of an embodiment example of a stationary scroll plate that may be used additionally to the scroll plate according to the current invention.
[0048] FIGS. 8a, 8b show (a) a cross-sectional detail view of a preferred embodiment of an insert placed within a second recess of the stationary scroll plate illustrated in FIG. 7 and (b) different views of the preferred embodiment of the insert.
[0049] FIGS. 9a, 9b show two exemplary types of cooling chambers formed within the second recess of the stationary scroll plate of FIG. 7 by the insert illustrated in FIG. 8.
DETAILED DESCRIPTION
[0050] The following detailed description refers to the accompanying drawings that show, by way of illustration, specific details and embodiments in which the invention may be practiced.
[0051] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration”. Any embodiment or design described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments or designs.
[0052] FIG. 1 shows a cross-sectional view of an embodiment of a scroll compressor with an orbiting scroll plate according to the current invention. At 100, a scroll compressor is depicted. The scroll compressor comprises a case 110, a suction port 140, a discharge port 150, a stationary scroll plate 120 and an orbiting scroll plate 130. Further, the scroll compressor 100 comprises a motor 160, which is connected to a crankshaft 170 and the crankshaft 170 is connected to the orbiting scroll plate 130. Thereby, the motor drives the crankshaft 170 and causes a rotary motion of the crankshaft 170. Because the crankshaft is connected to the orbiting scroll plate 130, the rotary motion is transferred to an orbiting motion of the orbiting scroll plate 130. Further, the scroll compressor 100 comprises a lubricant supply 180, which may provide lubricant to the crankshaft 170, the orbiting scroll plate 130 and the stationary scroll plate 120.
[0053] The scroll compressor 100 has a low-pressure side and high-pressure side configuration. In this configuration, the low-pressure side comprises a lubricant supply 180, the motor 160, the crankshaft 170 and the suction port 140, whereas the high-pressure side comprises the discharge port 150. The stationary scroll plate 120 and the orbiting scroll plate 130 form a transition area from the low-pressure side to the high-pressure side.
[0054] FIG. 2 shows a highlighted area of the upper portion of the scroll compressor of FIG. 1 and illustrates the temperature areas within the scroll compressor.
[0055] At the low-pressure side, the fluid is received at the suction port. Since the fluid received at the suction port has a rather low pressure and temperature, the temperature at the low-pressure side is also rather low. In FIG. 2, the temperature of the low-pressure side is denoted as suction side temperature T.sub.s. Although the low-pressure side is characterized by a single temperature T.sub.s in FIG. 2, the person skilled in the art will appreciate that the temperature distribution at the low-pressure side is not necessarily homogenous.
[0056] Similarly, at the high-pressure side, the compressed fluid has the highest temperature, which is denoted discharge temperature T.sub.d. Again, the person skilled in the art will appreciate that deviations from the discharge temperature may occur and that the temperature distribution at the high-pressure side is not necessarily homogenous.
[0057] Further, the temperature in the compression chambers formed between the orbiting scroll plate and the stationary plate is higher than or equal to the suction side temperature T.sub.s and lower than or equal to the discharge temperature T.sub.d. During the compression procedure, the temperature in the compression chamber is increased from the suction side temperature T.sub.s to the discharge temperature T.sub.d. The temperature in the compression chambers is denoted T.sub.c. Again, the person skilled in the art will appreciate that the temperature distribution in the compression chambers is not homogenous as has been described before.
[0058] The compressor configuration depicted in FIG. 2 further has a so-called intermediate pressure cavity, which is located between the stationary scroll plate and a portion of the supporting frame to which the stationary scroll plate is attached. The intermediate pressure cavity is connected to the compression chambers for at least a portion of time via a so-called bleed hole, which relates the pressure inside the compression chambers to the pressure inside the intermediate pressure cavity. Further, the intermediate pressure cavity is used for pressing the stationary scroll plate against the orbiting scroll plate, thereby improving the sealing between the scroll plates. As is depicted in FIG. 2, the temperature of the fluid within the intermediate pressure cavity denoted is T.sub.i, which is a temperature higher than the suction side temperature T.sub.s but lower than the discharge temperature T.sub.d.
[0059] As the person skilled in the art will appreciate, the temperature areas depicted in FIG. 2 are simplifications and used for illustrative purposes only. As mentioned earlier, the temperature areas do not need to be homogeneous. Instead, they may represent temperature intervals. This is particularly important for the compression chamber temperature T.sub.c, which ranges from values similar to the suction side temperature T.sub.s at locations on the left and right hand side of FIG. 2 to values similar to the discharge temperature T.sub.d at the center of the interleaved scroll plates.
[0060] The frontside of the stationary scroll plate faces the compression chambers and has a temperature similar to temperature T.sub.c. The backside of the stationary scroll plate is in contact to the intermediate pressure cavity having temperature T.sub.i and in close contact to the high-pressure side having temperature T.sub.d. Therefore, the temperature at the backside of the stationary scroll plate is higher than the temperature T.sub.c of the frontside and may be close to the discharge temperate T.sub.d.
[0061] Similarly, the frontside of the orbiting scroll plate faces the compression chambers and also has a temperature similar to temperature T.sub.c. The backside of the orbiting scroll plate is in contact to the low-pressure side having the suction side temperature T.sub.s. Therefore, the temperature at the backside of the orbiting scroll plate is similar to the suction side temperature T.sub.s.
[0062] FIGS. 3a to 3d show cross-sectional views of some embodiments of a scroll plate according to the current invention. In the first embodiment of a scroll plate 130a depicted in FIG. 3a, the scroll plate 130a comprises a base plate 200 having a first side 205 and a second side 210. The first side comprises a spiral wrap 270 and may also be referred to as frontside. The second side comprises a recess 220 located at the surface of the second side, which has an annular shape, such that it occurs on the left and right image sides of the surface. Said recess 220 may be referred to as first recess, as has been described before. A more detailed example of an annular recess will be described below with respect to FIGS. 4a to 4c. Within the recess, an insulation material (not shown) can be placed, as will be shown in more detail below with respect to FIGS. 4a to 4c.
[0063] The scroll plate 130a depicted in FIG. 3a may be either a stationary scroll plate or an orbiting scroll plate. However, the scroll plate 130a is illustrated as an orbiting scroll, which can be identified by the annular protrusion 240, which forms a reception for a crankshaft, as will also be described in more detail below with respect to FIGS. 4a to 4c.
[0064] FIG. 3b illustrates a variation 130b of the embodiment example of the scroll plate 130a depicted in FIG. 3a. Here, a portion of the recess 220a extends into a portion of the annular protrusion 240, thereby allowing the placement of the insulating material not only at the second side of the base plate 200, but also around the annular protrusion 240. This may limit thermal deformation of the annular protrusion 240.
[0065] Additionally to the features of scroll plate 130a or 130b depicted in FIGS. 3a, 3b, the scroll plate 130c depicted in FIG. 3c comprises an additional recess 220b, which is located in the reception formed by the annular shaped protrusion 240. The person skilled in the art will appreciate that the recess 220b can be used additionally to the recess 220 as is depicted in FIG. 3c or alternatively to recess 220 even though this is not explicitly shown in a separate drawing.
[0066] Whereas the recesses 220, 220b depicted in FIGS. 3a to 3c are located at the surface of the second side 210 of the base plate 200, the scroll plate 13od depicted in FIG. 3d comprises recesses 225, 225b, which are located beneath the surface of the second side 210. Although the recesses 225, 225b in FIG. 3d are shown at lateral positions (with respect to the surface of the second side) corresponding to the recesses 220, 220b of the embodiment example depicted in FIG. 3c, the person skilled in the art will appreciate that other shapes are also possible. For example, a single recess may extend in a plane parallel to the surface of the base plate 200, may be annular and may have a diameter up to the extend of the base plate.
[0067] In the embodiment examples of orbiting scroll plates depicted in FIGS. 3a to 3d, the recesses and the insulating material are placed at the locations near the location of the protrusion for receiving a portion of the crankshaft. Although other locations for the recess are possible and are encompassed by the scope of the current application, the exemplary locations depicted in the drawings represent preferred examples. In case of a low-pressure side and high-pressure side scroll compressor configuration, these preferred examples account for temperature differences between the first side, which experiences a temperature similar to the discharge temperature in the center of the spiral wrap 270, and the second side, which experiences the substantially lower side temperature at the annular protrusion 240 caused by lubrication of the crankshaft with a lubricant and additionally contact with vapor at the suction side received from the suction port.
[0068] FIGS. 4a to 4c show embodiment examples of orbiting scroll plates according to the current invention, wherein (a) is a perspective view of an embodiment example of an orbiting scroll plate cut in half and (b), (c) are top views of the backside of two orbiting scroll plates having different shapes of insulating materials. The embodiment examples depicted in FIGS. 4a to 4c correspond to the illustration depicted in FIG. 3c. In these FIGS. 4a to 4c the insulating materials 230 and 260 located in recess 220 and 220b respectively are shown. Further, because of the perspective view, the annular shape of recess 220 and the circular shape of recess 220b as well as the annular shape of the protrusion 240 can be more clearly identified compared to the cross-sectional views depicted in FIG. 3c.
[0069] In FIGS. 4a and 4b, the insulating materials 230, 230a are represented by a ring made of insulating material being located in an annular recess 220, while the insulating material 260 is represented by a circle or disc made of insulating material located in a circular recess 220b. In contrast to insulating material 230a in FIG. 4b, the insulating material 230b in FIG. 4c does not form a closed ring. This allows the insulating material to increase or decrease its size caused by thermal effects within the insulating material. As the person skilled in the art will appreciate, this benefit may also be achieved by providing multiple portions of insulating material, which are placed in sections of the annular recess.
[0070] FIGS. 5a, 5b show another embodiment example of an orbiting scroll plate 130b according to the current invention, wherein the base plate consists of two parts, wherein the first part comprises the first side and the second part comprises the second side and wherein the insulating material is placed between the first part and the second part.
[0071] In this embodiment example, the base plate of scroll plate 130b is formed by a first portion 310, a second portion 320 and an insulating layer 330 placed in a recess between the first portion 310 and the second portion 320. As such, a recess in the sense of the current invention may also be interpreted as separation of the base plate into two portions 310 and 320. This embodiment example isolates the first portion 310 from the second portion 320 by ease of the insulating layer 330, which reduces heat transfer between both portions of the base plate of the scroll plate.
[0072] FIGS. 6a to 6c show another embodiment of a scroll compressor in which the current invention can be used, wherein the scroll compressor has a so-called high-side compressor configuration. (a) shows a cross-sectional view of the scroll compressor with thermal deformation management features added to the orbiting scroll plate, (b) shows a highlighted portion of the upper portion of the scroll compressor of (a) and illustrates the temperature areas within the scroll compressor, and (c) shows a cross-sectional view of the scroll compressor with thermal deformation management features added to the stationary scroll plate. Similarly to scroll compressor 100 depicted in FIG. 1, the scroll compressor 400a depicted in FIG. 6a comprises a case 410, a motor 460, a crankshaft 470, and a lubricant supply 480. These components all may have similar features as the corresponding features of scroll compressor 100.
[0073] Further, scroll compressor 400a comprises a scroll set, which forms one or more compression chambers during operation of the scroll compressor 400a. The scroll set is formed by a stationary scroll plate 420 and an orbiting scroll plate 430. Both scroll plates 420, 430 comprise spiral wraps, which form one or more compression chambers between them. Contrary to the scroll plates 120, 130 of scroll compressor 100, scroll plates 420, 430 of scroll compressor 400a are located at the high-pressure side. The scroll compressor 400a comprises a suction port 440 for receiving fluid and a discharge port (not shown) for discharging fluid from the compressor. Contrary to scroll compressor 100, the suction port 440 does not lead the received fluid to a low-pressure side, but instead feeds the fluid directly to the one or more compression chambers formed between the orbiting scroll plate 430 and the stationary scroll plate 420. The discharge port of scroll compressor 400a may be similar to discharge port 150 of scroll compressor 100.
[0074] Since both scroll plates 420, 430 are located at the high-pressure side, the back sides of both scroll plates 420, 430 experience a higher temperature than the temperature T.sub.c. As is illustrated in FIG. 6b, the stationary scroll plate 420 is surrounded by fluid ejected from the one or more compression chambers at the center of the stationary scroll plate 420, so that the stationary scroll plate is surrounded by fluid having the discharge temperature T.sub.d. Within the spiral wraps of the scroll plates 420, 430 the scroll plate experience different temperatures. The one or more compression chambers receive the fluid directly form the suction port, thereby at least partially experiencing the suction port temperature T.sub.sp. Since the fluid is compressed and thereby its temperature is increasing, the scroll plates at the locations of the interleaved spiral wraps experience the compression chamber temperature T.sub.c, which increases from T.sub.sp to T.sub.d.
[0075] In the embodiment example depicted in FIG. 6a, the orbiting scroll plate 430 comprises an insulation layer 510 located at its backside. This insulation layer 510 improves the thermal deformation behavior of the orbiting scroll plate similarly to what has been described with respect to the insulating material placed in recesses for the scroll plates of the high-pressure side and low-pressure side scroll compressor embodiments.
[0076] Scroll compressor 400b depicted in FIG. 6c is also a high-side scroll compressor and has similar features as scroll compressor 400a depicted in FIG. 6a. Also, its temperature areas are similar to the temperature areas depicted in FIG. 6b. However, in contrast to the scroll compressor 400a depicted in FIG. 6a, scroll compressor 400b depicted in FIG. 6c comprises thermal deformation management features applied to the stationary scroll plate. For example, stationary scroll plate 420 may comprise a recess with an insulating material at the side, which opposes the side with the spiral wrap. Alternatively, as is illustrated in FIG. 6c, an insulating layer 520 may cover the stationary scroll plate 420 and shield it from the high temperature T.sub.d. The insulating layer 520 may be made of the same material as the insulating material discussed above.
[0077] The following description relates to the case in which the scroll plate having one or more recesses with insulating material is an orbiting scroll plate. The one or more recesses of the orbiting scroll plate in which the insulating material is placed as has been described above may be referred to as one or more first recesses. In such an embodiment example, thermal deformation management may additionally be improved by adding thermal deformation management features to the stationary scroll plate. Preferably, the thermal deformation management features added to the stationary scroll plate may comprise an insert, which is placed in a second recess of the stationary scroll plate in a way that a cooling chamber is formed between the insert and the stationary scroll plate, said second recess being connected to a fluid injection line. FIGS. 7 to 9 illustrate such a stationary scroll plate and a corresponding insert for forming a cooling chamber.
[0078] FIG. 7 shows a cross-sectional view of an embodiment example of a stationary scroll plate 120a. Compared to the stationary scroll plate 120 of compressor 100, the stationary scroll plate 120a depicted in FIG. 7 comprises an insert 650 placed within a second recess 630 on a second side 610 of a base plate 600 of the stationary scroll plate 120a. The insert 650 forms a cooling chamber 640 within the second recess 630, which represents a volume within the second recess 630, which is separated from the remaining volume.
[0079] In order to provide a sealed separation from the remaining volume within the second recess 630, side portions of the insert 65o are connected to side walls 630a, 630b of the second recess 630. The side portions may be formed by legs 655a, 655b as will be illustrated in more detail with respect to FIG. 8a.
[0080] Another portion of the insert 650, which may be formed by one or more protrusions 660, keeps the insert 650 in a particular distance from the bottom 630c of the second recess 630. As is illustrated in FIG. 7, the protrusion 660 may define the height of the cooling chamber 640. In the embodiment example depicted in FIG. 7, the second recess 630 and the insert 650 have annular shapes.
[0081] The fluid that may for example be received from an injection line of a refrigeration cycle flows through the injection channel 680 within the base plate 600. Through an inlet channel 645a, a portion of the fluid flows into the cooling chamber 640. After passing through the cooling chamber 640, the fluid flows through the outlet channel 645b into the compression chamber formed between the interleaved spiral wraps 670. The person skilled in the art will be aware that there are various ways of how the inlet channel 645a may be formed. An example of such an inlet channel is depicted in FIG. 7, whereas FIG. 8a depicts a slightly different configuration.
[0082] FIGS. 8a, 8b show (a) a cross-sectional detail view of a preferred embodiment of an insert placed within a second recess of a stationary scroll plate and (b) a perspective view of the preferred embodiment of the insert.
[0083] The insert 65o depicted in FIG. 8a essentially has a U-shaped cross-section with two legs 655a and 655b. These legs 655a, 655b can be used to connect the insert 650 to the side walls 630a, 630b of the second recess 630. The connection may preferably be a sealed connection, so that the cooling chamber 640 is sealed from the intermediate pressure cavity formed in the remaining part of the second recess 630. The sealing may for example be achieved by interference fit or usage of a sealing element.
[0084] Further, the insert 650 comprises at least one protrusion 660. The at least one protrusion 660 lies on the bottom 630c of the second recess. Hence, the length of the protrusion 660 defines the height of the cooling chamber 640. In the embodiment example depicted in FIG. 8a, the insert 650 comprises two protrusions 660, which are located at the edges of the insert 650, or in other words at locations opposing the legs 655a, 655b. The two protrusions 660 allow the forming of the cooling chamber 640 between them and the bottom of the second recess. Alternatively but not shown, the insert may comprise a single protrusion located centrally (similar to what is shown in FIG. 7), so that the cooling chamber is formed on either sides of the protrusion.
[0085] In another example, which is not depicted in the figures, the legs 655a, 655b of the insert 650 may face toward the bottom 630c of the second recess 630. In this case, no protrusion is necessary because the height of the chamber 640 is defined by the length of the legs 655a, 655b.
[0086] Further as is already shown in FIGS. 7 and 8a, the connection between the insert 650 and the wall of the second recess may be sealed by one or more seals 665. These seals may be sealing elements (e.g. O-rings) or may be established by interference fit.
[0087] FIG. 8b shows three views of the insert 650 of FIG. 8a without the surrounding stationary scroll plate. The first image is a perspective view of the insert 650, while the second image is a perspective view of a cross-section of the insert 650 and the third image is a cross-sectional view of the insert 650. The insert 650 comprises first and second legs 655a, 655b for being connected to side walls of a second recess in a stationary scroll plate and two protrusions 660, which are used for defining the height of the cooling chamber. As can be seen in FIG. 8b, the insert has an annular shape and is configured for being placed in an annular recess in a stationary scroll plate.
[0088] FIGS. 9a and 9b show two exemplary types of cooling chambers formed within the second recess by the insert. FIGS. 9a, 9b illustrate a top view of the arrangement of the cooling chamber 640 formed by the insert 650 in the second recess 630.
[0089] In the first example, which is depicted in FIG. 9a, the second recess 630 has an annular shape and extends around the aperture 620. The cooling chamber 640a formed by the insert 650 within the second recess also has an annular shape. The openings of the cooling chamber 640a to inlet and outlet channels, respectively, are not illustrated in the figure but may preferably be located at opposing sides of the annular ring, e.g. at locations corresponding to 12 o'clock and 6 o'clock in the FIG. 9 or any other opposing locations. In this way, the fluid received from the injection channel 680 via the first opening may distribute to two paths within the cooling chamber 640a and be guided to the second opening.
[0090] In the second example, which is depicted in FIG. 9b, the second recess 630 again has an annular shape and extends around the aperture 620. The cooling chamber 640b formed by the insert 650 within the second recess comprises a path, which is essentially formed by two concentric rings, which are connected. This way, the fluid can enter cooling chamber 640b via the inlet channel that ends in a first opening 710 and is guided through the cooling chamber 640b for almost an entire outer ring of the second recess 630, experiences a turn and is then guided within the inner ring towards the second opening 720 from where it is provided outlet channel.
[0091] The person skilled in the art will appreciate that various kinds of other cooling chamber arrangements are also possible and achieve the same or similar effects as the examples, which are explicitly shown in the figures. In particular any arrangement, in which the cooling chamber only covers a portion of the annular recess 230 is also encompassed by the scope of current invention even though such examples are not explicitly shown.
[0092] Further, the person skilled in the art will appreciate that multiple first openings, which connect the cooling chamber with the inlet channel within the base plate, and multiple second openings, which connect the cooling chamber with the outlet channel are also possible, even though this is not explicitly shown. Thereby, curved cooling chambers and several branches can be designed.
[0093] The at least one protrusion of the insert may be used to define the course of the cooling chamber in order to achieve the aforementioned designs.
[0094] What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the described embodiments are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims.
