KR20180054831A - Cooling method of compressor or vacuum pump and compressor or vacuum pump applying this method - Google Patents

Abstract

The present invention relates to a compressor or a vacuum pump, comprising: a casing (2) having a cooling gas inlet (3) and a cooling gas outlet (4) so that a cooling gas can flow therethrough; A fan (12) mounted to the cooling gas inlet (3), the fan (12) comprising a fan housing (13) and configured to blow cooling gas into the casing (2); - a compression or vacuum chamber (5) comprising a first housing (6), a process gas inlet (7) through which the process gas can flow, a process gas outlet (8), and at least one rotary element (9); A drive module (15) comprising a second housing (16) and at least one bearing (17) for supporting at least one rotary element (19); And a silencer (18) comprising a cover (19) and adapted to relieve the noise produced by the compressor or vacuum pump (1), characterized in that the silencer (18) Characterized in that the cover (19) comprises a recess structure (20) configured to deflect the cooling gas from the housing (12) towards the drive module (15).

Description

Cooling method of compressor or vacuum pump and compressor or vacuum pump applying this method

The present invention relates to a compressor or a vacuum pump, comprising: a casing having a cooling gas inlet and a cooling gas outlet so that the cooling gas can pass therethrough; A fan mounted to the cooling gas inlet and including a fan housing, the fan configured to blow cooling gas into the casing; A compression or vacuum chamber including a first housing, a process gas inlet and a process gas outlet through which the process gas can flow, and at least one rotating element; A drive module including a second housing and at least one bearing supporting at least one rotating element; And a muffler comprising a cover and configured to alleviate the noise produced by the compressor or vacuum pump.

Keeping the temperature of the various components of the compressor or vacuum pump under control is a challenge for designers.

Some of the existing structures extract air from the interior of the compressor or vacuum pump and blow the air into the surrounding environment while other structures utilize the convective capability of the different cover materials used to fabricate the components.

One example is Hitachi Koki Co., Ltd., which discloses a layout for an air compressor that uses two fans to create two air streams to cool different sections of the compressor unit. US 2009/0194 177 A1. ≪ / RTI >

Because this structure uses two fans, there are three different areas in the casing that allow air to enter the casing and three other areas that allow air to flow from the casing to the environment.

By providing three inlets and three outlets, the manufacturing of the casing is further complicated because additional cutting and finishing steps will have to be performed. In some cases, such entrances and exits create a structural weakening point for the casing. This necessitates the addition of additional stiffeners, which in effect increases manufacturing time and absolutely increases manufacturing costs.

Another disadvantage of such a structure is the complexity of the layout in that each of the two fans must be connected to a drive unit.

Another example can be found in US 4,283,167 A of Varian Associates, which discloses a vacuum pump that includes a fan that sucks air from an external environment and directs the air to the pump casing. The casing also includes pins extending horizontally and vertically along its surface for cooling.

Tests have shown that, during operation of the vacuum pump, different temperature zones are being formed between the components and the adjacently placed components affect each other's temperature. One of the disadvantages of the vacuum pump described above is that such regions are not determined or are treated differently in terms of cooling. As a result, the cooling process becomes inefficient.

In addition, due to the influence of the different components arranged adjacently, it is necessary to select a material having a high thermal resistance for an element which does not necessarily need to be, which increases the manufacturing cost of the unit. On the other hand, if such a material is not used, the high temperature that accompanies the vacuum process will wear the components prematurely.

In view of the above-mentioned disadvantages, an object of the present invention is to provide a compressor or a vacuum pump capable of efficiently maintaining a desired temperature of components.

Another object of the present invention is to provide a compressor or vacuum pump that has a smaller footprint and layout than a conventional unit.

The present invention also aims to increase the lifetime of the components used while reducing the likelihood that adjacent different components will be affected by the temperature of each other.

Another object of the present invention is to facilitate assembly and disassembly of a compressor or a vacuum pump. This can reduce manufacturing and maintenance time.

The present invention solves at least one of the above problems and / or other problems by providing a compressor or a vacuum pump as follows,

A casing having a cooling gas inlet and a cooling gas outlet so that the cooling gas can pass therethrough;

A fan mounted to the cooling gas inlet, the fan comprising a fan housing and configured to blow cooling gas into the casing;

A compression or vacuum chamber comprising a first housing, a process gas inlet and a process gas outlet through which the process gas can flow, and at least one rotating element;

A drive module including a second housing and at least one bearing supporting at least one rotating element; And

- a silencer comprising a cover and configured to alleviate the noise produced by the compressor or vacuum pump,

The silencer includes a recessed structure on the cover configured to deflect cooling gas from the fan toward the drive module.

Since the silencer includes a recessed structure in its cover, the cooling gas from the fan can be deflected towards the drive module, preventing the components of the drive module from reaching high temperatures.

Because the casing only includes a cooling gas inlet and a cooling gas outlet to enable the flow of cooling gas therethrough, the compressor or vacuum pump according to the present invention utilizes only the components required to achieve a compression or vacuum process Thereby achieving efficient cooling of the different components.

The compressor or vacuum pump according to the present invention utilizes its components, including the casing, to guide the flow of cooling gas to where it needs to be cooled. Thus, the temperature of all components is kept below the desired limit in an efficient manner.

Because cooling is performed in this fashion, the footprint of the compressor or vacuum pump is such that the space between adjacent components is sufficiently small to create a channel for concentrating the cooling gas flow to a location known to exhibit high temperatures By arranging the components in the same way, they can be significantly reduced.

As a result, the degree to which the different components of the compressor or vacuum pump are cooled can also be determined through design. Thus, for increased efficiency, the cooling gas flow must first reach the components known to reach a lower temperature than the other components, and then, before being guided only out of the casing, As shown in FIG. By considering this, the efficiency of the cooling process is improved.

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

In tests, it has been found that due to a compression or vacuum process, the components of the process gas and hence the compression or vacuum chamber in the compression or vacuum chamber reach a much higher temperature than the drive elements of the drive module.

If the cooling gas flow from the fan is not directed towards the drive module, the temperature of the compression or vacuum chamber is heavily influenced by the temperature of the components in the drive module, thereby shortening the life of the components.

Due to this layout, the cooling process of the compressor or vacuum pump is much more efficient.

The present invention also relates to a method for cooling a compressor or a vacuum pump, the method comprising the following steps.

- blowing a predetermined volume of cooling gas through the cooling gas inlet of the casing of the compressor or vacuum pump;

- deflecting the cooling gas of said volume towards the surface of the second housing of the drive module comprising at least one bearing;

Guiding the flow of cooling gas towards the first surface of the first housing of the compression or vacuum chamber including at least one rotating element;

- relieving the noise produced by the compressor or vacuum pump and providing a silencing device comprising the cover,

The step of biasing the volume of cooling gas entering through the cooling gas inlet towards the surface of the second housing of the drive module further comprises guiding the volume of cooling gas through the recess structure on the cover of the silencer.

Since the method according to the present invention follows such steps, the cooling process is performed in such a way that the cooling gas flow first arrives at components known to reach lower temperatures during operation and only then reaches a higher temperature Is much more efficient than known compressors or vacuum pumps in terms of reaching the elements.

Thus, different components can be handled differently when cooled, so that even if the compressor or vacuum pump is designed to reach a higher compression or lower vacuum limit, which is known to produce higher temperatures, The material selected may be a standard material.

Since the step of deflecting the cooling gas and the step of guiding are performed by different components, the footprint of the compressor or vacuum pump is significantly reduced.

The present invention also relates to the use of a muffler for cooling a drive module of a compressor or vacuum pump comprising a recess on the surface of the cover for deflecting a flow of cooling gas towards the drive module, And at least one bearing.

The present invention also relates to a silencing device for alleviating the noise produced by a compressor or vacuum pump, wherein the silencing device comprises a cover and the silencing device comprises a recessed structure having a height H and a length L in the cover , The recess structure includes a relatively straight surface over a distance x and a relatively curved surface over a distance Lx to deflect the cooling gas away from the silencer towards the drive module.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better illustrate the features of the present invention, some preferred configurations according to the present invention will now be described by way of example without intending to be limiting with reference to the accompanying drawings.
1 schematically shows a compressor or a vacuum pump according to an embodiment of the present invention,
Figure 2 schematically illustrates the internal layout of a compressor or vacuum pump according to an embodiment of the present invention,
Figure 3 schematically shows the layout of the fan according to an embodiment of the present invention,
Fig. 4 schematically shows the fan shown in Fig. 3 rotated 180 degrees by the axis AA '
Figure 5 schematically shows an exploded view of the layout of a silencer according to an embodiment of the invention,
Figure 6 schematically illustrates internal components of a vacuum chamber and a drive module according to an embodiment of the present invention,
Figure 7 schematically shows a drive module according to an embodiment of the invention,
Figure 8 schematically illustrates a compression or vacuum chamber according to an embodiment of the present invention,
Fig. 9 schematically shows a recessed structure partially cut along the line XIX-XIX in Fig.

Figure 1 shows a compressor or vacuum pump 1 including a casing 2 which also has a cooling gas inlet 3 and a cooling gas outlet 3 for allowing a certain volume of cooling gas to pass therethrough, 4).

Generally, it will be appreciated that the cooling gas is air, but the present invention is not limited to air as a cooling gas but may also operate with other types of gases.

2, the compressor or vacuum pump 1 also comprises a compression or vacuum chamber 5 defined by the first housing 6, a process gas inlet 7 (not shown) through which the process gas can flow, ), A process gas outlet 8, and at least one rotary element 9 (see Fig. 6).

The process gas inlet 7 may be connected to an external module 10 (see Fig. 1) which may be a gas supply in the case of a compressor or a gas receiver in the case of a vacuum pump. The process gas outlet 8 may also be connected to the user network 11, where a compressed gas is provided or a vacuum is produced.

In the context of the present invention, the compressor or vacuum pump may be a single screw compressor, a multiple screw compressor, a scroll compressor, a claw vacuum pump, a multi-claw vacuum pump, a single screw vacuum pump, Pump, rotary vane vacuum pump, and the like. Each of the above-described compressors or vacuum pumps may be oil-injected or oil-free.

It should be understood that said at least one rotary element 9 represents at least one screw, scroll or claw of said compressor or vacuum pump which produces vacuum or compressed gas by rotation.

The compressor or vacuum pump 1 of the present invention also includes a fan 12 mounted to the cooling gas inlet 3 which includes an impeller (not shown) and a fan housing 13, And is configured to blow cooling gas into the casing (2).

Preferably, the fan housing 13 is formed in a volute shape on the side facing the casing 2 (see Fig. 3), and the volute is formed by a cooling gas driven by the impeller And includes a channel (14) for sending into the interior of the casing (2).

On the opposite side of the volute, the fan housing 13 includes at least one orifice through which cooling gas can flow into it, which is displaced by the movement of the impeller towards the interior of the casing 2.

Preferably, the fan housing 13 also includes an orifice on its side that allows a larger volume of cooling gas to reach the impeller.

The compressor or vacuum pump 1 also comprises a drive module 15 (see Figures 2 and 7) which is connected to the second housing 16 and the at least one rotary element 9, At least one bearing 17 (see Fig.

The compressor or vacuum pump 1 according to the invention also comprises a silencer 18 which is arranged to mitigate the noise produced by the compressor or vacuum pump 1 and which comprises a cover 19 Reference).

Preferably, the silencing device 18 includes a recessed structure 20 in its cover 19 configured to deflect the cooling gas from the fan 12 toward the drive module 15.

9, the recess structure 20 has a height H and a length L, and preferably a cooling gas flow from the fan 12 flows through the recess structure 20 Lt; RTI ID = 0.0 > x. ≪ / RTI > Over the distance L-x, the recess structure 20 preferably includes a slope or curved surface that deflects the cooling gas flow away from the silencer 18 toward the drive module 15.

In one embodiment according to the present invention, the recess structure 20 may comprise a slope over the entire distance L, in which case x may be zero.

In another embodiment according to the present invention, the recess structure 20 may comprise two or more channels having a height H and a length L, as described above.

In another embodiment according to the present invention, the recess structure 20 may be in the shape of a triangle with rounded edges, with the base of the triangle on the side of the fan 12 facing the channel 14, There is a triangle tip near the drive module 15. The triangle may produce a continuous slope over the distance L, where x may be zero, or the slope may be a distance x from the edge of the cover 19 of the silencer 18, where x is zero Which has a non-negative value.

Due to the recess structure 20, the compressor or vacuum pump 1 can utilize its components to control the direction of the cooling gas flow from the fan 12, Enabling control of the surface of the component. This allows a more controlled cooling process with more efficient and predictable results to be designed.

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

A seal 21 is provided in the second housing 16 (see FIG. 6) for sealing, and this seal 21 is preferably provided with a compression or vacuum chamber 22 to prevent the oil from escaping the drive module 15. [ (5).

Typically, the second housing 16 may be made of a metal such as, but not limited to, iron, stainless steel, aluminum, an aluminum alloy or any other metal or alloy thereof.

In the context of the present invention at least one rotary element 9 comprises a rotor body surrounded by a compression or vacuum chamber 5 and a bearing 17 and a seal 21, It should be understood that the present invention includes rotor shafts. Preferably, the at least one rotary element 9 also comprises a gas seal 22 before exiting the first housing 6 of the compression or vacuum chamber 5. The first and second housings 6 and 16 are sealed to each other except for the rotor shaft of at least one rotary element 9 that enters into the second housing 16 of the drive module 15. [

Typically, for efficiency, both the seal 21 and the gas seal 22 may be made of a variety of materials, such as polymer or rubber (synthetic or natural) Is known to have a relatively low melting point compared to other components such as the second housing 16 and the like.

For this reason, the temperature of the drive module 15 needs to be kept below a predetermined limit, which is 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 kept below a certain limit, in order not to alter the properties of the oil.

By deflecting the cooling gas flow from the fan 12 towards the drive module 15 by the recess structure 20 the temperature of the components is kept below that limit so that the temperature of the seal 21 and of the oil in the oil bath It prolongs the life. Thereby, the periodic maintenance of the compressor or the vacuum pump 1 can be performed after a longer time, so that the compressor or the vacuum pump 2 according to the present invention can be made less costly and more reliable.

In the context of the present invention, when the compressor or vacuum pump 1 is a double screw, double tooth or double claw compressor or vacuum pump 1, the drive module 15 comprises two bearings 17 And that each bearing is used to support one rotating element 9, has at least one seal 21 and is also provided around one rotor shaft.

In a preferred embodiment according to the invention the compressor or vacuum pump 1 also has a channel structure (not shown) between the first housing 6 of the compression or vacuum chamber 5 and the second housing 16 of the drive module 15 23) to allow cooling gas to flow between the first and second housings 6, 16 (see Figures 7 and 8).

Preferably the channel structure 23 prevents cooling gas flow from entering the first housing 6 of the compression chamber or vacuum chamber 5 or into the second housing 16 of the drive module 15 .

As a result, a cooling gas layer is held between the first and second housings 6, 16 during operation of the compressor or vacuum pump 1.

7, the channel structure 23 is formed in the vicinity of the outer wall of the second housing 16 of the drive module 15 at the side facing the first housing 6 Shape. Thus, when the second housing 16 of the drive module 15 and the first housing 6 of the compression or vacuum chamber 5 are mounted in the compressor or vacuum pump 1, the channel structure 23 has a first And is movable between the first and second housings 6, 16 after the cooling gas is deflected by the recess structure 20 and the silencer 18 is moved between the first and second housings 6, So that it can reach the casing 2 on the side opposite to the mounting place.

In another embodiment according to the present invention, when the compressor or vacuum pump 1 comprises two bearings 17, the channel structure 23 may be created between the two bearings 17, (23) may include a channel structure (23) created between two grooves (17) and a groove created proximate to the side walls on the side facing the first housing (6).

The cooling channel structure 23 described above may have a simple structure such as being approximately parallel to the outer wall of the second housing 16 and / or approximately straight when reaching the channel between the two bearings 17, Irregular or serpentine shape.

In another embodiment according to the present invention, the channel structure 23 and / or the groove shape of the structure may also include pins. These pins increase the efficiency of the cooling process because they function as radiators.

In yet another embodiment according to the present invention, the first and second housings 6, 16 can be created as a single housing, and the cooling channel structure 23 can be created through casting.

In the test it has been found 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. As a result, the generated coolant gas layer becomes very important in that it reduces the fear of temperature influence between the first and second housings 6, 16 through conduction. At the same time, the cooling gas flow achieves efficient cooling for 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 according to the invention, the drive module 15 is arranged between the fan 12 and the compression or vacuum chamber 5.

By adopting such a layout, the maintenance of the compressor or the vacuum pump 1 can be performed in a very easy manner.

It is known that it is necessary to perform periodic cleaning of, for example, at least one rotary element 9 of the vacuum pump 1. By placing the drive module 15 between the fan 12 and the vacuum chamber 5, the user of the vacuum pump according to the present invention is only able to move the casing 2 of the vacuum pump 1 and the first chamber 1 of the vacuum chamber 5, After the housing 6 is opened and at least one rotary element 9 is separated and cleaned, the vacuum pump may be continuously used for the application.

This allows maintenance to be performed by the user, which results in a much lower maintenance cost and a much shorter time when the vacuum pump is not used.

For ease of manufacture and compactness, it is preferred that the fan 12 and at least one bearing 17 be mounted on a common shaft.

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

Preferably, the compressor or vacuum pump 1 also comprises a motor 24 disposed on the exterior of the casing 2 for driving at least one rotary element 9.

The compressor or vacuum pump 1 may include a thermal shield (not shown) provided between the motor 24 and the fan 12. The heat shielding mechanism may be selected from the group consisting of a metal plate, a radiator, a heat insulating material, and a fan mounted in the casing of the motor to guide the flow of cooling gas away from the compressor or vacuum pump 1, 24 may be disposed at a minimum distance from the compressor or vacuum pump 1 so that the possible heat effects between the two are eliminated.

In another embodiment according to the present invention the fan 12 is disposed within the casing 2 and also includes the fan 12 from the outside of the casing 2 without being affected by the temperature caused by the motor 24 And may include regions of perforated material to enable the cooling gas to be recovered. Such an area can be created on at least one side of the casing 2 or on two sides of the casing 2, preferably that area can be created on three sides of the casing, , The area can be created in the casing 2 along the periphery of the fan 12. [

In yet another embodiment, the fan 12 may include at least one orifice 26 that allows a certain volume of cooling gas to reach the impeller. Preferably, but not exclusively, for increased cooling efficiency, the fan 12 includes a plurality of orifices 26 around and / or through its center.

Preferably, the motor 24 drives a shaft that rotates the fan 12, which shaft also rotates its shaft in the second housing 16 of the drive module 15 with at least one bearing 17 By the connection, at least one rotary element 9 is also rotated.

When the compressor or vacuum pump 1 has two rotary elements 9, the bull gear 27 (see FIG. 6) moves the motion of the rotary element 9, which is driven by the motor, Can be used to synchronize with the motion of the motor (9).

In another embodiment according to the present invention, the motor 24 may drive the shaft on which the fan 12 is mounted, separately from the shaft that drives the at least one rotating element 9.

In another embodiment according to the present invention, the fan 12 may be driven by a motor (not shown) different from the at least one rotary element 9.

The fan 12 may be mounted such that the volute of the fan housing 13 directly contacts and overlaps the second housing 16 of the drive module 15 or the fan 12 may be mounted on the second Or may be disposed perpendicular to the housing 16.

For a much more efficient cooling, the compressor or vacuum pump 1 may further comprise a radiator 25 disposed in 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, and the risk of deformation that may occur due to the region reaching high temperatures can be minimized or even eliminated.

In a preferred embodiment according to the invention, the silencing device 18 is arranged under the compression or vacuum chamber 5.

As a result, the compressor or vacuum pump 1 according to the present invention is very compact as compared with the conventional one.

The silencer 18 is located under 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 silencing device 18 is configured such that the cooling gas flowing through the recess structure 20 is compressed or transferred to the first housing 6 of the vacuum chamber 5 and to the second housing (not shown) of the drive module 15 16).

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

This causes the cooling gas flow from the fan 12 to be guided along the length L in the recess structure 20 and also through the channel structure between the first and second housings 6, Therefore, the cooling gas coming from the fan 12 is not allowed to disappear in the entire casing 2, and its path is controlled through the layout of the compressor or the vacuum pump 1. [

After the cooling gas flow has passed through the channel structure between the first and second housings 6 and 16, the cooling gas flow reaches the casing 2, which is preferably a compressed or vacuum chamber Means for deflecting the flow of cooling gas along the first surface of the first housing 6 of the vacuum chamber 5 and for cooling the flow of the cooling gas along a second surface of the first housing 6 of the vacuum chamber 5, Means for returning in the direction of the device 18, and means for guiding the cooling gas flow to the outside of the casing 2.

Preferably, the means for deflecting and returning to the silencer and guiding it outwardly comprise a casing 2, an additional component attached to the casing 2, or a compressor or a compressor arranged to change the direction of the cooling gas flow, The shape of the specific bent portion of the other components of the vacuum pump 1 can be made.

Thus, the cooling gas flow will pass through the three sides of the compression or vacuum chamber 5 before being sent to the external environment. As a result, the compression or vacuum chamber 5 in which the highest temperature is generated is efficiently cooled through the entire operation of the compressor or vacuum pump 1.

Preferably, the compressor or vacuum pump 1 is a claw compressor or a vacuum pump.

The present invention also relates to a method of cooling a compressor or vacuum pump (1), wherein a predetermined volume of cooling gas from an external environment flows through a cooling gas inlet (3) of a casing (2) of a compressor or vacuum pump Blowing. The cooling gas of that volume is deflected toward the surface of the second housing 16 of the drive module 15 for cooling of the casing. The drive module (15) comprises at least one bearing (17).

The flow of cooling gas is then directed towards the first surface of the first housing 6 of the compression or vacuum chamber 5, which also comprises at least one rotary element 9 to be cooled.

The method according to the invention further comprises the step of mitigating both the noise generated by the compressor or vacuum pump 1 and possibly also the vibration and providing the silencer 18 including the cover 19.

Preferably, the volume of cooling gas is guided through the recess structure 20 on the cover 19 of the silencer 18 so that the volume of cooling gas is directed to the second housing 16 of the drive module 15 As shown in Fig.

For complete cooling of the compressor or the vacuum pump 1 the method also includes flowing the flow of cooling gas from the first surface of the first housing 6 of the vacuum chamber 5 along the second surface, 2 through the cooling gas outlet (4).

The method according to the invention preferably also provides for a flow of deflected cooling gas 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 And guiding along the height of the drive module (15).

The invention also relates to the use of a silencer (18) for cooling a drive module (15) of a compressor or vacuum pump (1), the silencer (18) deflecting the cooling gas flow towards the drive module On the surface of the cover (19), and the drive module (15) comprises at least one bearing (17).

The present invention also relates to a muffling device for mitigating noise produced by a compressor or vacuum pump and comprising a cover (19), the muffling device (18) having a height (H) and a length L Wherein the recess structure 20 comprises a relatively straight surface over a distance x to deflect the cooling gas away from the silencer 18 towards the drive module 15, , And a relatively curved surface over the distance Lx.

It is to be understood that the present invention is not limited to the embodiments described in the examples and illustrated in the drawings, but such a compressor or vacuum pump 1 and / or silencer 18 may be implemented in various variations without departing from the scope of the invention .

Claims (16)

As a compressor or vacuum pump:
- a casing (2) having a cooling gas inlet (3) and a cooling gas outlet (4) so that a cooling gas can flow therethrough;
- a fan (12) mounted to said cooling gas inlet (3), said fan (12) comprising a fan housing (13) and configured to blow said cooling gas into said casing (2);
- a compression or vacuum chamber (5) comprising a first housing (6), a process gas inlet (7) allowing the process gas to flow therethrough, a process gas outlet (8), and at least one rotary element (9);
A drive module (15) comprising a second housing (16) and at least one bearing (17) for supporting said at least one rotary element (19); And
A silencer (18) comprising a cover (19) and adapted to relieve the noise produced by said compressor or vacuum pump (1)
(1) according to claim 1,
Characterized in that the silencer (18) comprises in its cover (19) a recess structure (20) configured to bias the cooling gas from the fan (12) towards the drive module (15) Vacuum pump. The compressor or vacuum pump according to claim 1, characterized in that the drive module (15) comprises an oil bath for cooling and / or lubricating the at least one bearing (17). 3. A compressor or vacuum pump as claimed in claim 2, characterized in that the at least one bearing (17) comprises a seal (21) which prevents oil from escaping the drive module (15). 2. A method according to claim 1, characterized in that cooling gas is introduced between the first housing (6) of the compression or vacuum chamber (5) and the second housing (16) of the drive module (15) 16. The compressor of claim 1, further comprising: The compressor or vacuum pump according to claim 1, characterized in that the drive module (15) is arranged between the fan (12) and the compression or vacuum chamber (5). 6. A compressor or vacuum pump according to claim 5, characterized in that 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) disposed outside the casing (2) for driving the at least one rotary element (9). The compressor or vacuum pump according to claim 1, further comprising a radiator (25) located in the first housing (6) of the compression or vacuum chamber (5). A compressor or vacuum chamber according to claim 1, characterized in that said silencer (18) is arranged under compression or vacuum chamber (5). 2. A device according to claim 1, characterized in that the casing (2) comprises means for deflecting the cooling gas flow along the first surface of the first housing (6) of the compression or vacuum chamber (5) Means for re-sending along the second surface of the first housing 6 of the chamber 5 in the direction of the silencer 18 and means for guiding the cooling gas flow to the outside of the casing 2 Wherein the pump is a vacuum pump. The compressor or vacuum pump according to claim 1, characterized in that the compressor or vacuum pump (1) is a claw compressor or a vacuum pump. CLAIMS 1. A method for cooling a compressor or a vacuum pump,
- blowing a predetermined volume of cooling gas through the cooling gas inlet (3) of the casing (2) of the compressor or vacuum pump (1);
- deflecting the cooling gas of said volume towards the surface of the second housing (16) of the drive module (15) including at least one bearing (17);
- guiding the flow of cooling gas towards the first surface of the first housing (6) of the compression or vacuum chamber (5) including at least one rotary element (9);
- relieving the noise produced by the compressor or vacuum pump (1) and providing a silencer (18) including a cover (18)
A cooling method for a compressor or a vacuum pump,
The step of deflecting the volume of cooling gas entering through the cooling gas inlet (3) toward the surface of the second housing (16) of the drive module (15) Further comprising guiding through the recess structure (20) on the cover (19) of the compressor (1). 13. A method as claimed in claim 12, characterized in that a flow of said cooling gas is applied along the second surface from the first surface of the first housing (6) of the compression or vacuum chamber (5) ≪ / RTI > further comprising the step of: < / RTI > 13. A method as claimed in claim 12, characterized in that a flow channel is provided between the first housing (6) of the compression or vacuum chamber (5) and the second housing (16) Further comprising the step of guiding along the height of the module (15). The use of a silencing device for cooling a drive module of a compressor or vacuum pump, wherein the silencing device (18) comprises a recess structure (20) for deflecting a flow of cooling gas towards the drive module (15) , Wherein the drive module (15) comprises at least one bearing (17). A silencer (18) for mitigating noise generated by a compressor or vacuum pump and comprising a cover (19), said silencer (18) having a recess (19) having a height H and a length L (20) having a relatively straight surface over a distance x to deflect the cooling gas away from the silencer (18) towards the drive module (15) and a relatively straight surface over a distance x ≪ / RTI > wherein the surface comprises a relatively curved surface.

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