JP6657387B2 - Method for cooling a compressor or vacuum pump and compressor or vacuum pump applied to such method - Google Patents

Description

  The present invention relates to a compressor or a vacuum pump, a casing provided with a cooling gas inlet and a cooling gas outlet through which a cooling gas can flow, and a fan housing provided at the cooling gas inlet. And a first housing, a process gas inlet and a process gas outlet through which a process gas can flow, and at least one rotating element, the fan being configured to blow a cooling gas into the casing. A compression or vacuum chamber, a drive module with at least one bearing for supporting the second housing and at least one rotating element, and a cover for damping noise generated by the compressor or the vacuum pump. A compressor or vacuum pump of the type further comprising a silencer configured.

  Maintaining controlled temperatures of different components of a compressor or vacuum pump is a challenge faced by designers.

  Some existing designs extract air from within the casing of a compressor or vacuum pump and blow this air into the surrounding environment, if any, the convective capacity of different cover materials used to manufacture the components. Some use.

  One example is found in U.S. Patent Application Publication No. 2009/0194177 (A1) in the name of Hitachi Koki Co., which discloses that two air streams are created to create a compressor. A layout of an air compressor using two fans to cool different zones of the unit is disclosed.

  Because this design example uses two fans, the casing has three distinct areas that allow air to enter the casing and allow air to flow out of the casing and into the external environment. And three other areas.

  By providing three inlets and three outlets, the manufacture of the casing is also further complicated. Since additional cutting and finishing steps must be performed. In some cases, such inlets and outlets are weak structural parts of the casing. This requires the addition of additional stiffeners, which increases the manufacturing time and, of course, increases the manufacturing costs.

  Another disadvantage of such a design is the complexity of the layout, since each of the two fans must be connected to a drive unit.

  Another example can be found in U.S. Pat. No. 4,283,167 (A) in the name of Varian Associates, which takes air from the external environment and directs it to the pump casing. A vacuum pump having a directing fan is disclosed. The casing further has fins extending vertically and horizontally along its surface for cooling purposes.

US Patent Application Publication No. 2009/0194177 (A1) U.S. Pat. No. 4,283,167 (A)

  Test results indicate that during the performance of the vacuum pump function, regions of different temperatures occur between the components and adjacently positioned components affect each other's temperature. One of the disadvantages of the vacuum pumps described above is that such areas cannot be located or treated separately in terms of cooling. This makes the cooling process inefficient.

  Furthermore, due to the influence of different components located next to each other, a material with a high thermal resistance needs to be selected for those elements that do not necessarily require it, which increases the production costs of the unit. On the other hand, if such materials are not used, the high temperatures involved in the vacuum process will cause such materials to wear prematurely.

  In view of the above disadvantages, it is an object of the present invention to provide a compressor or vacuum pump that effectively maintains a desired temperature of a component.

  It is another object of the present invention to provide a compressor or vacuum pump that has a smaller footprint and a simpler layout than existing units.

  It is a further object of the present invention to extend the life of the components used and reduce the risk that different adjacent components will affect each other's temperature.

  It is another object of the present invention to make it easier to assemble and disassemble a compressor or vacuum pump. Because of this, manufacturing and maintenance time can be reduced.

The invention is a compressor or a vacuum pump,
-Having a casing with a cooling gas inlet and a cooling gas outlet through which a cooling gas can flow,
-Having a fan provided at the cooling gas inlet and having a fan housing, wherein the fan is configured to blow the cooling gas into the casing;
A first housing, a compression or vacuum chamber with a process gas inlet and a process gas outlet through which a process gas can flow and at least one rotating element;
-Having a drive module with a second housing and at least one bearing for supporting at least one rotating element;
-Having a silencer comprising a cover and configured to attenuate noise generated by the compressor or vacuum pump;
Providing a compressor or a vacuum pump, wherein the silencer has a recessed structure provided on a cover of the silencer and configured to divert a cooling gas flow from a fan toward a drive module. Solves at least one of the above problems and / or other problems.

  The silencer has a concave structure in the cover of the silencer, so that the cooling gas flow coming from the fan can be diverted towards the drive module, thereby protecting the components of the drive module and increasing its height Prevent temperature from reaching.

  The compressor or vacuum pump of the present invention achieves a compression or vacuum process, since the casing has only a cooling gas inlet and a cooling gas outlet to allow the cooling gas flow to flow. Achieve efficient cooling of different components by using only those components needed for

  The compressor or vacuum pump of the present invention uses its components, including a casing, that guides the cooling gas flow wherever cooling is required. Thus, the temperature of all these components is kept below the desired threshold in an efficient manner.

  Cooling is performed in this manner, so that the space between components adjacent to each other is small enough to create a channel for concentrating the cooling gas flow wherever high temperatures are known to appear. By positioning the components in this way, the footprint of the compressor or vacuum pump can be significantly reduced.

  To this end, the order of cooling the different components of the compressor or vacuum pump can also be determined through design. Therefore, in order to increase the efficiency, the cooling gas flow should be directed so that it can first reach components known to reach lower temperatures than the other components, and only then outside the casing To the components known to reach high temperatures. Taking this into account increases the efficiency of the cooling process.

  Preferably, the drive module is located between the fan and the compression or vacuum chamber.

  Test results show that due to the compression or vacuum process, the process gas in the compression or vacuum chamber and thus in the component elements of the compression or vacuum chamber reaches a much higher temperature than the component elements of the drive module.

  If the cooling gas flow coming from the fan is not directed towards the drive module, the temperature of the compression or vacuum chamber has a significant effect on the temperature of the component elements in the drive module, so that the life of these component elements is reduced. Be shorter.

  Because of this layout, the compressor or vacuum pump cooling process is very efficient.

The invention further provides a method of cooling a compressor or a vacuum pump, the method comprising the following steps:
-Blowing a quantity of cooling gas through a cooling gas inlet of a casing of a compressor or a vacuum pump,
-Diverting an amount of cooling gas towards the surface of the second housing of the drive module with at least one bearing;
Guiding the cooling gas stream towards a first surface of a first housing of a compression or vacuum chamber, the compression or vacuum chamber having at least one rotating element;
Providing a muffler for attenuating noise generated by the compressor or vacuum pump, the muffler having a cover,
The step of deflecting an amount of cooling gas entering through the cooling gas inlet toward the surface of the second housing of the drive module includes displacing the amount of cooling gas into a recessed structure provided in the cover of the silencer. A method for cooling a compressor or vacuum pump, further comprising the step of directing.

  Since the method of the present invention is performed according to such steps, the cooling process is much more efficient than a known compressor or vacuum pump. This is because the cooling gas flow first reaches components that are known to reach a lower temperature during the functioning, and only thereafter to components that are known to reach a higher temperature.

  Thus, different components are treated differently when such components are cooled, so that the materials selected for such components may cause the compressor or vacuum pump to produce high temperatures. Standard materials may be used even if they are designed to reach a known high compression limit or low vacuum limit.

  Since the steps of diverting and guiding the cooling gas flow are performed with the help of different components, the footprint of the compressor or vacuum pump is considerably reduced.

  The present invention further relates to the use of a muffler for cooling a drive module of a compressor or a vacuum pump, the muffler being provided on a surface of a cover of the muffler and providing a cooling gas flow to the drive module. And a drive module having at least one bearing.

  The present invention is further a muffler for attenuating noise generated by a compressor or a vacuum pump, wherein the muffler has a cover, wherein the muffler is provided on the cover and has a height H and A recessed structure having a length L, the recessed structure having a relatively straight surface and a distance Lx over a distance x for diverting the cooling gas away from the silencer and directing it towards the drive module. Muffler characterized by having a relatively curved surface across the muffler.

  In order to better illustrate the features of the present invention, some preferred embodiments thereof will now be described, by way of example, with reference to the accompanying drawings, which do not limit the invention in any way.

It is a figure showing roughly a compressor or a vacuum pump as an embodiment of the present invention. It is a figure showing roughly an internal layout of a compressor or a vacuum pump as an embodiment of the present invention. It is a figure showing roughly the layout of the fan as an embodiment of the present invention. FIG. 4 is a schematic view of the fan shown in FIG. 3 rotated by 180 ° about an axis AA ′. 1 is a schematic exploded view of a silencer layout according to an embodiment of the present invention. FIG. 5 schematically illustrates internal components of a vacuum chamber and a drive module according to an embodiment of the present invention. It is a figure showing roughly a drive module as an embodiment of the present invention. 1 schematically illustrates a compression or vacuum chamber as an embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of the recess structure as viewed along the line XIX-XIX in FIG. 5.

  FIG. 1 shows a compressor or vacuum pump 1 having a casing 2, which further has a cooling gas inlet 3 and a cooling gas outlet 4 through which a certain amount of cooling gas can flow.

  Typically, the cooling gas is air, but it should be understood that the invention is not limited to air as the cooling gas, and the invention is useful with other types of gases. is there.

  As shown in FIG. 2, the compressor or vacuum pump 1 includes a first housing 6, a process gas inlet 7 through which a process gas can flow, a process gas outlet 8, and at least one rotating element 9 (FIG. 6).

  The process gas inlet 7 may be connected to an external module 10 (FIG. 1), which in the case of a compressor is a gas source and in the case of a vacuum pump it is a gas receiver. The process gas outlet 8 may further be connected to a user's network 11, in which compressed gas is provided or a vacuum is created.

  In the context of the present invention, the compressor or vacuum pump 1 comprises a single-screw compressor, a multi-screw compressor, a scroll compressor, a single-claw vacuum pump, a multiple-claw vacuum pump, a single-screw It should be understood to include vacuum pumps, multi-screw vacuum pumps, scroll vacuum pumps, rotary vane vacuum pumps, and the like. Each of the compressors or vacuum pumps of the type described above may be oil cooled or oilless.

  It should be further understood that at least one rotating element 9 represents at least one screw, scroll or claw element of the compressor or vacuum pump 1 described above, such element being rotated by a vacuum or compressed gas. Cause.

  The compressor or vacuum pump 1 of the present invention further comprises a fan 12 provided at the cooling gas inlet 3 and having an impeller (not shown) and a fan housing 13, wherein the fan is Is blown into the casing 2.

  Preferably, the fan housing 13 is in the form of a volute on the side facing the casing 2 (FIG. 3), the channel comprising a channel for directing the cooling gas driven by the impeller towards the inside of the casing 2. It has 14.

  On the opposite side of the volute, the fan housing 13 has at least one orifice that allows the cooling gas to enter the inside of the casing 2 and move toward the inside of the casing 2 by the movement of the impeller.

  Preferably, the fan housing 13 further comprises an orifice provided on the lateral side to allow a large amount of cooling gas to reach the impeller.

  The compressor or vacuum pump 1 further comprises a drive module 15 (FIGS. 2 and 7) with a second housing 16 and at least one bearing 17 (FIG. 6) supporting at least one rotary element 9.

  Further, the compressor or vacuum pump 1 of the present invention has a silencer 18 with a cover 19, which is configured to attenuate the noise generated by the compressor or vacuum pump 1 (FIG. 5). ing.

  Preferably, the silencer 18 has a recessed structure 20 provided at its cover 19 and configured to divert the flow of cooling gas from the fan 12 toward the drive module 15.

  In a preferred embodiment of the present invention, as shown in FIG. 9, the recess structure 20 has a height H and a length L, and the recess structure preferably includes a cooling gas coming from the fan 12. The flow is designed to be able to maintain its trajectory within the recess structure 20 over a distance x. The recess structure 20 preferably has a slope or curved surface that diverts the cooling gas flow away from the silencer 18 and toward the drive module 15 over a distance L-x.

  In one embodiment of the invention, the recess structure 20 may have a gradient over the entire distance L, in which case x is zero.

  In another embodiment of the present invention, the recess structure 20 may have two or more channels with a height H and a length L as described above.

  In yet another embodiment of the present invention, the recess structure 20 may be in the form of a triangle with rounded edges, the triangle being on the side of the fan 12 facing the channel 14. It has a base and the apex of the triangle is located near the drive module 15. The triangle can create a continuous gradient over the distance L, where x is zero, or the gradient is reduced after the distance x (where x has a value different from zero). May start from the edge of the cover 19.

  With the help of the recess structure 20, the compressor or vacuum pump 1 utilizes its components to control the direction of the cooling gas flow coming from the fan 12, and also allows the control of the surface of the components to provide the cooling gas. The flow is brought into contact with the recess structure. Thus, a more controlled cooling process can be designed with efficient and predictable results.

  Preferably, the drive module 15 further comprises an oil bath provided in the second housing 16 for cooling and / or lubricating the at least one bearing 17, which oil bath is not shown in the drawing. .

  For sealing purposes, a seal 21 is provided in the second housing 16 (FIG. 6), which is preferably in a compression or vacuum chamber 5 to prevent oil from leaving the drive module 15. It is positioned on the facing side.

  Typically, the second housing 16 is made of a metal, such as iron, stainless steel, aluminum, an aluminum alloy, or any other metal or alloy thereof (these are exemplary and not limiting). Good to be manufactured from.

  In the context of the present invention, it should be understood that at least one rotating element 9 has a rotor body housed in a compression or vacuum chamber 5 and a rotor shaft housed in a drive module 15 and has a bearing 17 and a seal 21 are provided around this rotor shaft. Preferably, at least one rotating element 9 further comprises a gas seal 22 located before exiting the first housing 6 of the compression or vacuum chamber 5. For this purpose, the first and second housings 6, 16 are sealed off from one another, except for the rotor shaft of at least one rotating element 9 that enters the second housing 16 of the drive module 15.

  Typically, for efficiency purposes, both the seal 21 and the gas seal 22 may be made of materials such as different types of polymers or rubbers (synthetic or natural), for example, such materials may include other materials. It is known to have a relatively low melting point compared to the component elements of, for example, at least one bearing 17 or the second housing 16.

  For this purpose, the temperature of the drive module 15 needs to be maintained below a certain threshold determined based on the material used for the seal 21. In addition, the temperature of the oil in the oil bath also needs to be maintained below a certain threshold in order not to modify the properties of the oil.

  By diverting the cooling gas flow coming from the fan 12 towards the drive module 15 with the aid of the recess structure 20, the temperature of the components is kept below a threshold and the life of the oil in the seal 21 and the oil bath is increased. Extend. For this reason, the compressor or the vacuum pump 1 is preferably periodically maintained after a long period of time, so that the compressor or the vacuum pump 1 of the present invention can be manufactured at low cost and with high reliability.

  In the context of the present invention, it should be understood that if the compressor or vacuum pump 1 is a twin screw or double tooth or double claw compressor or vacuum pump 1, the drive modules 15 will each be It has two bearings 17 which are used to support the respective rotating elements 9 and have at least one seal 21 and are respectively provided around each rotor shaft.

  In a preferred embodiment of the invention, the compressor or vacuum pump 1 is provided between the first housing 6 of the compression or vacuum chamber 5 and the second housing 16 of the drive module 15 and the cooling gas is It further comprises a channel structure 23 which allows flow between the first housing 6 and the second housing 16 (FIGS. 7 and 8).

  Preferably, the channel structure 23 is made in such a way that a cooling gas flow is prevented from entering the first housing 6 of the compression or vacuum chamber 5 or the second housing 16 of the drive module 15.

  Thus, the cooling gas layer is maintained between the first housing 6 and the second housing 16 while performing the function of the compressor or the vacuum pump 1.

  As an example, as shown in FIG. 7, this channel structure 23 is located near the outer wall of the second housing 16 of the drive module 15 and on the side facing the first housing 6 and on both side walls. It is good to have the shape of a groove made in the vicinity. Thus, when the second housing 16 of the drive module 15 and the first housing 6 of the compression or vacuum chamber 5 are provided in the compressor or the vacuum pump 1, the channel structure 23 is formed by the first housing 6 and the second housing 16, so that the cooling gas can move between the first housing 6 and the second housing 16 after being diverted by the recess structure 20, and a silencer 18 is provided. The casing 2 can be reached on the side opposite to the side on which it is mounted.

  In another embodiment of the invention, if the compressor or vacuum pump 1 has two bearings 17, a channel structure 23 can also be made between the two bearings 17 or the channel structure 23 And a groove made on the side facing the channel structure 23 made between the first housing 6 and the two bearings.

  The cooling channel structure 23 can have a simple structure that is, for example, substantially parallel to the outer wall of the second housing 16 and / or substantially straight when relating to the channel between the two bearings 17 or more complex. Can have irregular or tortuous shapes.

  In another embodiment of the present invention, the channel structure 23 and / or the channel-shaped structure may further include fins, which increase the efficiency of the cooling process as they act as radiators.

  In yet another embodiment of the present invention, the first and second housings 6, 16 may be made as a single housing, and the cooling channel structure 23 may be made by casting.

  Test results show that the temperature of the process gas in the compression or vacuum chamber 5 reaches a much higher temperature than the oil in the bearing 17 and the drive module 15. For this reason, the cooling gas layer created is of great importance, since such a cooling gas layer reduces by conduction the fear of temperature effects between the first housing 6 and the second housing 16. It is because. At the same time, the cooling gas flow achieves efficient cooling of both the first housing 6 of the compression or vacuum chamber 5 and the second housing 16 of the drive module 15.

  In a preferred embodiment of the present invention, drive module 15 is located between fan 12 and compression or vacuum chamber 5.

  By employing such a layout, maintenance of the compressor or the vacuum pump 1 can be performed very easily.

  It is known that when the embodiment of the vacuum pump 1 is employed, it is necessary to carry out a periodic cleaning of at least one rotary element 9. By arranging the drive module 15 between the fan 12 and the vacuum chamber 5, the user of the vacuum pump of the present invention can use the vacuum pump 1 and the casing 2 of the vacuum pump 1 of the vacuum chamber 5 and the first of the vacuum chamber 5. Once the housing 6 has been opened, at least one rotating element 9 can be removed and cleaned, and the use of a vacuum pump can be continued in the application according to the invention.

  Thus, maintenance can be performed by the user, resulting in very low maintenance costs and a very short period of time when the vacuum pump is not used.

  For ease of manufacture and for obtaining compactness, the fan 12 and at least one bearing 17 are preferably mounted on a common shaft.

  It is to be understood that the invention is not limited to the above-described layout, but that the fan 12 and at least one bearing 17 may be mounted on different shafts.

  Preferably, the compressor or the vacuum pump 1 further comprises a motor 24 for driving at least one rotary element 9 when arranged outside the casing 2.

  The compressor or vacuum pump 1 may further include a heat shield (not shown) provided between the motor 24 and the fan 12. The heat shield is selected from the group consisting of a metal plate, a radiator, a heat insulator, and a fan that directs the cooling gas flow away from the compressor or vacuum pump 1 when provided within the motor casing. Alternatively, the motor 24 may be located at a minimum distance from the compressor or vacuum pump 1 so as to eliminate possible thermal effects between it and the compressor or vacuum pump 1.

  In another embodiment of the present invention, the fan 12 is located within the casing 2, and the fan 12 transfers cooling gas from outside the casing 2 without the fan 12 being affected by the temperature of the heat generated by the motor 24. It may further have a region of perforated material that allows it to be recovered. Such areas may be made on at least one side of the casing 2 or on both sides of the casing 2, preferably such areas may be made on three sides of the casing, and even more preferably Such an area may be made in casing 2 along the periphery of fan 12.

  In yet another embodiment, the fan 12 may have at least an orifice 26 that allows some amount of cooling gas to reach the impeller. Preferably, to enhance cooling efficiency, fan 12 has a plurality of orifices 26 throughout its perimeter and / or through its center, but is not limited to such.

  Preferably, the motor 24 drives the shaft, since the shaft is connected to at least one bearing 17 in the second housing 16 of the drive module 15, which rotates the fan 12 and at least one more One rotating element 9 is rotated.

  If the compressor or vacuum pump 1 has two rotating elements 9, a bull gear 27 (FIG. 6) may be used to synchronize the movement of the rotating element 9 driven by the motor with the movement of the other rotating element 9. .

  In another embodiment of the invention, the motor 24 can drive a shaft on which the fan 12 is mounted independently of the shaft on which the at least one rotating element 9 is driven.

  In yet another embodiment of the present invention, the fan 12 may be driven by another motor (not shown) than in the case of the at least one rotating element 9.

  The fan 12 may be mounted such that the volute of the fan housing 13 is in direct contact with and overlaps the second housing 16 of the drive module 15, or the fan 12 may be The second housing 16 may be arranged vertically.

  To obtain even higher efficient cooling, the compressor or vacuum pump 1 may further comprise a radiator 25 arranged on the first housing 6 of the compression or vacuum chamber 5.

  Since the compressor or vacuum pump 1 has such a layout, efficient cooling of all components is performed, while minimizing the risk of deformation that can be caused by reaching high temperatures in the areas. Or even worse.

  In a preferred embodiment of the invention, the silencer 18 is located below the compression or vacuum chamber 5.

  For this reason, the compressor or vacuum pump 1 of the present invention is extremely compact as compared with existing compressors or vacuum pumps.

  Preferably, the silencer 18 is arranged below the compression or vacuum chamber 5 such that the first housing 6 of the compression or vacuum chamber 5 starts after the length L of the recess structure 20. Even more preferably, the silencer 18 is such that the cooling gas flowing through the recess structure 20 is directed between the first housing 6 of the compression or vacuum chamber 5 and the second housing 16 of the drive module 15. Be placed.

  The first housing 6 of the compression or vacuum chamber 5 may be arranged directly on the cover 19 of the silencer 18.

  Thus, the cooling gas flow coming from the fan 12 is directed along the length L into the recess structure 20 and further through the channel structure between the first housing 6 and the second housing 16. . Therefore, the cooling gas coming from the fan 12 is dissipated in the entire casing 2, and the path is controlled by the layout of the compressor or the vacuum pump 1.

  After the cooling gas flow has passed through the channel structure between the first housing 6 and the second housing 16, the cooling gas flow reaches the casing 2, which preferably converts the cooling gas flow. Means for deflecting along a first surface of the first housing 6 of the compression or vacuum chamber 5 and a second surface of the first housing 6 of the compression or vacuum chamber 5 for compressing the cooling gas flow in the direction of the silencer 18 And means for redirecting the cooling gas flow to the outside of the casing 2.

  Preferably, the aforementioned means for diverting, redirecting and directing the cooling gas stream may be in the form of a particular bend in the casing 2 or an additional component attached to the casing 2 Alternatively, it may be a different component of the compressor or vacuum pump 1, so that the cooling gas flow changes direction.

  Thus, the cooling gas flow flows along the three faces of the compression or vacuum chamber 5 before being directed to the external environment. For this reason, the compression or vacuum chamber 5 where the highest temperature occurs is effectively cooled by the entire function of the compressor or the vacuum pump 1.

  Preferably, the compressor or vacuum pump 1 is (but is not limited to) a claw compressor or vacuum pump.

  The invention further relates to a method for cooling the compressor or vacuum pump 1, wherein a certain amount of cooling gas from the external environment is blown through the cooling gas inlet 3 of the casing 2 of the compressor or vacuum pump 1. Such an amount of cooling gas is diverted toward the surface of the second housing 16 of the drive module 15 for cooling the casing. The drive module 15 has at least one bearing 17.

  Next, a cooling gas flow is guided towards the first surface of the first housing 6 of the compression or vacuum chamber 5, which has at least one rotating element 9 which is also cooled. .

  The method according to the invention further comprises the step of providing a silencer 18 for damping the noise and possibly also the vibrations generated by the compressor or the vacuum pump 1, the silencer 18 having a cover 19.

  Preferably, an amount of cooling gas is directed to the surface of the second housing 16 of the drive module 15 by directing an amount of cooling gas through a recessed structure 20 provided in the cover 19 of the silencer 18. Turn away.

  For complete cooling of the compressor or vacuum pump 1, the method compresses the cooling gas stream from the first surface along the second surface of the first housing 6 of the vacuum chamber 5 and of the casing 2. The method further comprises guiding into the cooling gas outlet 4.

  Preferably, the method of the present invention comprises distributing the diverted cooling gas stream by providing a channel between the first housing 6 of the compression or vacuum chamber 5 and the second housing 16 of the drive module 15. Guiding along the height of the vehicle.

  The invention furthermore relates to the use of a silencer 18 for cooling the drive module 15 of the compressor or vacuum pump 1, which is provided on the surface of its cover 19 and directs a cooling gas flow to the drive module 15. The drive module 15 has at least one bearing 17 with a concave structure 20 deflecting towards it.

  The present invention further relates to a muffler for attenuating noise generated by a compressor or a vacuum pump, wherein the muffler has a cover 19, wherein the muffler 18 is provided on the cover 19 and has a height. It has a recess structure 20 with H and a length L, which is relatively straight over a distance x for diverting the cooling gas away from the silencer 18 and directing it towards the drive module 15. A silencer characterized by having a surface and a relatively curved surface over a distance L-x.

  The present invention is not limited in any way to the embodiments described by way of example and shown in the drawings, wherein such a compressor or vacuum pump 1 and / or muffler 18 may be implemented without departing from the scope of the invention. It can be realized in the state of the various modifications.

Claims (16)

A compressor or a vacuum pump,
A casing (2) having a cooling gas inlet (3) through which a cooling gas can flow and a cooling gas outlet (4);
A fan (12) provided at the cooling gas inlet (3) and having a fan housing, wherein the fan is configured to blow the cooling gas into the casing (2);
A first housing (6), a compression or vacuum chamber (5) with a process gas inlet (7) and a process gas outlet (8) through which a process gas can flow and at least one rotating element (9). Have
A drive module (15) with a second housing (16) and at least one bearing (17) supporting said at least one rotating element (9);
-A compressor or vacuum pump comprising a silencer (18) comprising a cover (19) and configured to attenuate noise generated by said compressor or vacuum pump (1);
The muffler (18) is provided in the muffler cover (19) and is configured to divert the cooling gas flow from the fan (12) toward the drive module (15). A compressor or vacuum pump having the structure (20).   The compressor or vacuum pump according to claim 1, wherein the drive module (15) has an oil bath for cooling and / or lubricating the at least one bearing (17).   The compressor or vacuum pump according to claim 2, wherein the at least one bearing (17) has a seal (21) that prevents oil from leaving the drive module (15).   A cooling gas is provided between the first housing (6) of the compression or vacuum chamber (5) and the second housing (16) of the drive module (15) to supply cooling gas to the first housing. The compressor or vacuum pump according to claim 1, further comprising a channel structure that allows a flow between the (6) and the second housing (16).   The compressor or vacuum pump according to claim 1, wherein the drive module (15) is arranged between the fan (12) and the compression or vacuum chamber (5).   The compressor or vacuum pump according to claim 5, wherein the fan (12) and the at least one bearing (17) are mounted on a common shaft.   The compressor or vacuum pump according to claim 6, further comprising a motor (24) located outside the casing (2) for driving the at least one rotating element (9).   The compressor or vacuum pump according to claim 1, further comprising a radiator (25) disposed on the first housing (6) of the compression or vacuum chamber (5).   The compressor or vacuum pump according to claim 1, wherein the silencer (18) is located below the compression or vacuum chamber (5).   Said casing (2) means for deflecting said cooling gas flow along a first surface of said first housing (6) of said compression or vacuum chamber (5); and said muffler of said cooling gas flow. Means for redirecting further along the second surface of the first housing (6) of the compression or vacuum chamber (5) in the direction of the vessel (18), and for directing the cooling gas flow of the casing (2). The compressor or vacuum pump of claim 1, further comprising means for directing to the outside.   Compressor or vacuum pump according to claim 1, wherein the compressor or vacuum pump (1) is a claw compressor or vacuum pump. A method of cooling a compressor or a vacuum pump, said method comprising the following steps:
-Blowing a quantity of cooling gas through a cooling gas inlet (3) of the casing (2) of said compressor or vacuum pump (1),
-Diverting said quantity of cooling gas towards the surface of the second housing (16) of the drive module (15) with at least one bearing (17);
-Guiding said cooling gas stream towards a first surface of a first housing (6) of a compression or vacuum chamber (5), said compression or vacuum chamber (5) comprising at least one rotation Element (9),
-Providing a silencer (18) for attenuating noise generated by said compressor or vacuum pump (1), said silencer (18) having a cover (19);
The step of diverting the amount of cooling gas entering through the cooling gas inlet (3) toward the surface of the second housing (16) of the drive module (15) comprises the step of: A method of cooling a compressor or a vacuum pump, further comprising directing a working gas into a concave structure (20) provided in the cover (19) of the silencer (18).   The cooling gas stream from the first surface is directed along a second surface of the first housing (6) of the compression or vacuum chamber (5) and further to a cooling gas outlet of the casing (2). 13. The method for cooling a compressor or a vacuum pump according to claim 12, further comprising the step of guiding during (4).   The diverted cooling gas stream by providing a channel between the first housing (6) of the compression or vacuum chamber (5) and the second housing (16) of the drive module (15). 13. The method of cooling a compressor or vacuum pump according to claim 12, further comprising the step of guiding the pressure along the height of the drive module (15).   Use of a silencer for cooling a drive module of a compressor or a vacuum pump, wherein the silencer (18) is provided on a surface of a cover (19) of the silencer and directs a cooling gas flow to the silencer. Use, comprising a recess structure (20) diverting towards a drive module (15), said drive module (15) having at least one bearing (17).   A muffler for attenuating noise generated by a compressor or a vacuum pump, wherein the muffler (18) has a cover (19), wherein the muffler (18) includes the cover (19). A recessed structure (20) provided with a height H and a length L, said recessed structure (20) diverting cooling gas away from said silencer (18), and A silencer having a relatively straight surface over a distance x and a relatively curved surface over a distance L-x to direct towards (15).

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