Pump with pressure chamber and cooling system

Abstract

The invention relates to a pump (1) having a housing (3) which delimits a pressure chamber (2), the pressure chamber (2) having a pressure chamber inlet line (4) and a pressure chamber outlet line (5) arranged at a distance therefrom. The fluid flowing into the pressure chamber (2) via the pressure chamber inlet line (4) is pressurized via a displacement device displaceably arranged in the pressure chamber (2) and is discharged from the pressure chamber (2) via the pressure chamber outlet line (5). Furthermore, the pump (1) has a cooling system for cooling the housing (2) of the pump (1). The cooling system has at least one heat pipe (12) with a heat transfer fluid and at least one cooling body (8), wherein the at least one heat pipe (12) has a housing contact region (13) for thermally conductive contact of the heat pipe (12) with the housing (2) and a cooling body contact region (14) arranged at a distance therefrom for thermally conductive contact of the heat pipe (12) with the at least one cooling body (8). The heat of the housing (2) is transferred from the housing (2) to the at least one cooling body (8) via the at least one heat pipe (12) when the cooling system is used as required.

Description

Technical Field

[0001] The present invention relates to a pump with a housing which limits a pressure chamber, wherein the pump has a pressure chamber inlet line and a pressure chamber outlet line, wherein the pressure chamber inlet line and the pressure chamber outlet line respectively lead to the pressure chamber, wherein a fluid flowing into the pressure chamber via the pressure chamber inlet line can be loaded with pressure via a displacement device displaceably arranged in the pressure chamber and discharged from the pressure chamber via the pressure chamber outlet line, and the pump has a cooling system for cooling the housing of the pump. Background Art

[0002] Pumps or compressors are usually used to transport fluids. For pumps, the fluid to be transported is incompressible, while for compressors, the medium to be transported is compressible. Regardless of whether a pump or a compressor is used to transport the fluid, in the following text, both pumps and compressors are referred to and summarized under the term "pump" according to the definition described at the beginning.

[0003] Most commercial pumps have a housing which delimits a pressure chamber and has an inlet opening and an outlet opening. The inlet opening is connected to the pressure chamber inlet line and the outlet opening is connected to the pressure chamber outlet line. The fluid to be conveyed flows into the pressure chamber via the pressure chamber inlet line through the inlet opening, where it is loaded with pressure by a displacement device which is displaceably arranged in the pressure chamber and then flows out through the outlet opening into the pressure chamber outlet line. A large number of designs of displacement devices are known from the prior art, wherein the displacement device can be designed as a piston in the form of a piston pump which loads the fluid with pressure or can also be designed as a diaphragm in the form of a diaphragm pump, in addition to a large number of other design possibilities.

[0004] Especially in the case of high volume flow, high pressure or high delivery speed of the pump, the delivery of the fluid also causes heat generation in the area of ​​the pressure chamber. The heat generated here must be derived from the pump so as not to damage the pump and to be able to maintain its power. Because the high delivery speed has the following disadvantages, friction heat is generated by the friction of the components displaced relative to each other and the fluid to be delivered, and the friction heat heats the medium and the pump itself. When compressing the fluid and for the mechanically movable parts of the pump, heat can also be generated additionally. All this plays an important role in the case of high compression pressure of the gas. The heat generated must be derived from the pump itself or from the housing as mentioned above, so as not to overload the mechanical components of the pump and not to limit the performance of the pump unnecessarily. If the fluid should have a high temperature in the pressure chamber when it flows in or by the heating caused by the pump, then compared with the fluid with a lower temperature, only a smaller compression of the fluid and a smaller pressure can be generated, because the thermal movement (Temperaturbewegung) of the fluid particles (Fluidteilchen) resists compression. If a sufficiently high heat dissipation cannot be ensured, only a relatively small compression of the fluid can be achieved with the pump, which limits the performance of the pump.

[0005] In order to facilitate the extraction of heat, a simple embodiment of the pump has a housing made of a material with good thermal conductivity, such as a metal or a metal alloy, so that the heat generated by the mechanical work and compression can be discharged to the housing and finally discharged to the surrounding environment via the housing. Other embodiments have an additional cooling system, with which individual components or the housing itself can be cooled, so as to resist unfavorable heating of the housing. Such a cooling system can be designed, for example, as water cooling, in which the heat of the housing is transferred to a carrier fluid, such as water, which is in contact with the housing and can reduce the temperature of the housing by absorbing the heat of the housing. Water cooling usually requires that the housing to be cooled is connected to the cooling water circuit sufficiently tightly and that the cooling power caused by the water cooling is appropriately controlled or adjusted. The cooling effect is often considered insufficient in view of the necessary expenditure. Summary of the invention

[0006] It is therefore seen as an object to provide a pump with a cooling system which can be cooled as efficiently as possible in a simple manner.

[0007] This object is achieved in that a cooling system comprises at least one heat pipe with a heat transfer fluid and at least one cooling body, wherein the at least one heat pipe comprises a housing contact region for heat-conducting contact of the heat pipe with the housing and a cooling body contact region arranged spaced apart therefrom for heat-conducting contact of the heat pipe with the at least one cooling body, wherein heat of the housing is transferred from the housing to the at least one cooling body via the at least one heat pipe when the cooling system is used in accordance with the specification.

[0008] Such a design allows efficient cooling performance to be achieved, wherein heat from the thermally loaded pump components and / or the housing itself can be transferred to the cooling body via the at least one heat pipe. By cooling the housing, the fluid of the pump that is in contact with the housing and is to be conveyed can also be cooled, whereby a higher volume flow can be conveyed with the same pump design. For example, a pump designed in this way can reliably fall below and comply with temperature limits predefined by standards, whereby a higher power density of the pump can be achieved while keeping the temperature constant.

[0009] According to the design of the present invention, for this purpose, at least one heat pipe and at least one cooling body are provided in order to lead heat from the housing. The at least one heat pipe can be designed as a straight or partially curved pipe, wherein a heat transfer fluid is present in the inner space surrounded by the pipe wall. The at least one heat pipe is connected to the housing of the pump in a heat-conducting manner with the housing contact area of ​​the heat pipe and is connected to the at least one cooling body with a cooling body contact area opposite to the housing contact area. By heating the housing, the housing contact area of ​​the heat pipe is heated and the initially liquid heat transfer fluid in the heat pipe is heated to boiling point, wherein the heat transfer fluid is partially converted from its liquid phase to a gas phase. Through the local pressure change thus generated, the gaseous medium now diffuses in the entire inner space, and condenses in the colder cooling body contact area while releasing its heat and thus returns to its liquid state, wherein the medium can be reheated and introduced back into the circulation. The at least one heat pipe can be designed as a pipe with a circular, oval, rectangular or other polygonal cross section, and can therefore be matched to the respective use sites and the situations existing there. Furthermore, the at least one heat pipe can also have different or even alternating shapes in sections.

[0010] Preferably, the inner space of the at least one heat pipe is divided into a plurality of capillaries, and the at least one heat pipe is designed as a passive heat pipe. The heat transfer fluid condensed at the cooling body contact area can be led back to the shell contact area by capillary action. There is no need to actively lead the condensed heat transfer fluid back to the shell contact area separately, which significantly simplifies the design and operation of the cooling system. The use of heat pipes configured as heat pipes can achieve high heat flux densities in any orientation on the one hand and achieve the following use on the other hand, that is, the use does not rely on the return of the condensed heat transfer fluid by gravity. However, other designs of heat pipes and, if necessary, actively controlled operation of heat pipes are also feasible.

[0011] The at least one cooling body itself can be designed as a passive cooling component or also as an active cooling component, which releases the heat transferred from the housing to the at least one cooling body via the at least one heat pipe to the surrounding air. The at least one cooling body has a thermal conductivity as high as possible so that heat can be quickly transported away from the pump housing. The at least one cooling body itself can be arranged at the housing with a cooling body contact surface or in contact with the housing wall or also configured as a single piece with the housing wall, so that in addition to the heat transfer from the housing to the at least one cooling body via the at least one heat pipe, the heat transfer directly from the housing to the at least one cooling body can also be realized. In this way, heat transfer and thus cooling power can be increased. In an alternative design, the cooling body can also be arranged to be separated from the housing in space, wherein the heat transfer to the cooling body is only realized via the at least one heat pipe.

[0012] In addition to the design of the pump with a single heat pipe and a single cooling body, the invention also provides design variants in which a plurality of heat pipes connect the housing to a commonly used cooling body or a heat pipe connects the housing to a plurality of cooling bodies or a plurality of heat pipes connect the housing to a plurality of cooling bodies. The cooling of the pump and the cooling power required for this purpose can thus be matched to the requirements of the pump.

[0013] Furthermore, it is optionally provided that the at least one cooling body has a cooling body block and a cooling rib assembly connected to the cooling body block in a heat-conducting manner, the cooling rib assembly having a plurality of cooling ribs arranged at intervals from each other, wherein the heat absorbed by the cooling body block is released to the surrounding air via the cooling ribs. The cooling body block and / or the cooling ribs can be made of a material that has a particularly good heat conductivity, such as a metal or a metal alloy, and in particular of aluminum and / or copper. Alternatively, the cooling body block and / or the cooling ribs can also be made of or coated with another material or composite substance (Verbundwerkstoff, sometimes referred to as a composite material) that has a good heat conductivity. The cooling body block is preferably designed in this way, that is, the heat transferred to the cooling body block via the at least one heat pipe or directly transferred to the cooling body block via the housing can be quickly absorbed, so that the heat can flow away from the housing in the direction of the cooling body block. For this purpose, the cooling body contact area of ​​the at least one heat pipe can be directly connected to the cooling body block via direct contact, or a heat-conducting glue with a particularly good heat conductivity can be arranged between the two components, so as to design and additionally improve the heat transfer as effectively as possible.

[0014] For improved heat dissipation of the cooling body to the surrounding air, a cooling rib arrangement can be arranged on the cooling body block. Preferably, the cooling rib arrangement has a plurality of cooling ribs arranged at a distance from one another, which can be realized, for example, as plates arranged at a distance from one another. The cooling ribs or the plates particularly preferably have as large a surface as possible while being as small as possible, so that the heat transferred from the cooling body block to the cooling ribs can be quickly dissipated to the surrounding air via the large contact surface between the cooling ribs and the surrounding air. In this case, the cooling ribs can also have partially or completely penetrating recesses or a shape different from that of the plates.

[0015] The heat transfer from the cooling body block to the cooling ribs can be improved by constructing the cooling body block as a single piece with the cooling ribs, so as to design the heat transfer particularly effectively. Alternatively, the cooling ribs can also be connected to the cooling body block in a heat-conducting manner via another suitable connection. In a non-single-piece design, a suitable heat-conducting glue with a high thermal conductivity can also be arranged between the cooling body block and the cooling ribs, so as to improve the heat-conducting connection between the cooling ribs and the cooling body block. In an alternative design possibility, the at least one heat pipe can also be arranged directly at the cooling ribs with its cooling body contact area, so that heat can be released directly to the cooling ribs while bypassing the cooling body block. In such a design, it can be advantageous that the at least one heat pipe is arranged at the cooling ribs along the longitudinal direction, so as to achieve the largest possible contact surface between the at least one heat pipe and the cooling ribs.

[0016] This embodiment of the cooling system is based on purely passive elements. As a result, the cooling of the pump can be achieved cost-effectively, very effectively and also quietly, since movable parts of the cooling system can be omitted.

[0017] In addition, according to the present invention, it is provided that an air flow generating device is arranged at the at least one cooling body, wherein the air flow generating device can generate an air flow in order to additionally cool the cooling ribs. In addition to the already mentioned pure passive cooling of the cooling ribs of the at least one cooling body, wherein the heat absorbed by the cooling ribs is released to the surrounding air and carried away by convection, it can also be provided that the cooling ribs are actively cooled. For this purpose, the air flow generated by the air flow generating device can be guided through the cooling ribs, whereby the cooling ribs are additionally cooled and the air flow also helps to carry away the hot surrounding air in addition to the pure convection flow. For this purpose, the air flow generating device can be designed as a ventilator arranged at the cooling ribs, which blows the generated air flow directly onto the cooling ribs arranged spaced apart from each other or through the cooling ribs. This can achieve a compact arrangement of the cooling system in the smallest possible space, because a smaller number of cooling ribs can be used by additional active cooling. In an alternative design, the air flow generating device can also be arranged to be spaced apart from the cooling body, wherein the air flow can be blown onto the cooling ribs via one or more suitable air channels.

[0018] An advantageous embodiment of the concept of the invention provides that the cooling system has a water cooling device for cooling the cooling body contact area of ​​the at least one heat pipe. In addition to the additional cooling of the cooling ribs by the air flow generating device, the cooling system can also alternatively have a water cooling device. In this case, the heat of the cooling body contact area of ​​the at least one heat pipe can be transferred by water or another fluid with high thermal conductivity that is in contact with the cooling body contact area or flows past the cooling body contact area. The fluid heated in this way can be guided in a circulation, wherein the fluid is subjected to alternating heating and cooling.

[0019] The water cooling device can surround the at least one heat pipe in sections or completely at the cooling body contact area, for example in the form of a tube that wraps the heat pipe in sections or is guided spirally around the heat pipe. The water flowing in the tube can absorb the heat of the at least one heat pipe along the contact area and conduct the heat from the at least one heat pipe. The tube is preferably implemented as a closed system in which the heated water is in a circulation system. The heated water is transported away, cooled here if possible using other passive or active cooling, and can then be reused to cool the cooling body contact area of ​​the at least one heat pipe.

[0020] In addition, it is optionally provided that the at least one heat pipe is arranged in a cooling body recess of the cooling body block with a cooling body contact area and is thermally connected to the cooling body block. By arranging the at least one heat pipe or its cooling body contact area in the cooling body recess of the cooling body block, it is possible to achieve as effective heat transfer as possible, in such a way that the contact surface between the at least one heat pipe and the cooling body block is as large as possible. The larger the contact area, the more heat can be transferred between the two components per unit time. Preferably, the at least one heat pipe can also have one or more bends here so that the contact area can be further expanded. Alternatively or additionally to this, for effective heat transfer, a plurality of heat pipes can also be used, which are arranged in a plurality of cooling body recesses of the cooling body block. It is also feasible that the at least one heat pipe is arranged in a cooling rib recess of a cooling rib, wherein the absorbed heat can be directly transferred to one or more cooling ribs.

[0021] The cooling body recess and / or the cooling rib recess can be matched to the shape of the at least one heat pipe in order to design the contact surface between the at least one heat pipe and the cooling body block or between the at least one heat pipe and the cooling rib to be as large as possible. Alternatively, the cooling body recess and / or the cooling rib recess can have a shape different from that of the at least one heat pipe, wherein in both cases the cooling body recess and / or the cooling rib recess can be lined with a heat-conducting paste that has a particularly good heat-conducting effect for optimized heat transfer. If the at least one heat pipe and the cooling body block are not to be constructed in one piece, such a heat-conducting paste makes it possible to compensate for manufacturing tolerances, such as small unevenness of the surface and thus a smaller contact area.

[0022] According to a design solution of the inventive concept, it is provided that the cooling body contact area of ​​the at least one heat pipe is in thermal contact with the contact plate, wherein the contact plate has a high thermal conductivity of more than 200 W / m·K and in particular more than 300 W / m·K, and wherein the contact plate can be cooled by an air flow generating device or connected to the at least one cooling body. In order to design the contact area and thus the heat transfer to be as effective as possible, the cooling body contact area of ​​the at least one heat pipe can be connected to the contact plate or extended to the contact plate. The contact plate is preferably made of a material that has a particularly good thermal conductivity, such as aluminum, and is particularly preferably made of a material such as copper and / or silver and / or gold and / or alloys thereof, so that an optimized heat transfer from the at least one heat pipe to the contact plate and finally an optimized heat transfer away from the contact plate can be achieved. For a particularly effective connection, the at least one heat pipe can also be made of the same material as the contact plate.

[0023] The contact plate can be designed for this purpose preferably as a flat plate, which has a larger surface either for the cooling body or for the air flow generating device than the cooling body contact area of ​​the at least one heat pipe, in order to design the additional heat transfer to be as effective as possible. In this case, the mutual connection of the components can also be improved by using and appropriately arranging heat-conducting glue. Depending on the design of the cooling body block, in which the at least one heat pipe has at least one bend in its cooling body contact area, the cooling body contact area of ​​the at least one heat pipe can also have at least one bend in the design with the contact plate, in order to increase the contact area of ​​the two components and thus the heat transfer.

[0024] Optionally, the cooling ribs are arranged parallel to the surface of the housing. The cooling ribs of the cooling rib assembly can be arranged at a distance from each other on the cooling body block and parallel to the surface. In addition to the individual cooling ribs being arranged at the cooling rib block, the individual cooling ribs can be arranged at a distance from each other and parallel, wherein they are connected to each other only via the at least one heat pipe, thereby producing a layered arrangement in one direction in a manner supported by the at least one heat pipe.

[0025] According to a design solution of the present invention, the cooling ribs are arranged at an angle to the surface of the housing. The cooling ribs arranged at an angle to the surface can be particularly effectively matched to the available structural space or the spatial requirements in the operating location of the pump.

[0026] Optionally, it is provided that the pressure chamber inlet line and / or the pressure chamber outlet line extend parallel to the cooling body block over as large an area as possible and / or are partially embedded therein. The arrangement of the pressure chamber inlet line and / or the pressure chamber outlet line extending parallel to the cooling body block enables a large contact area to be achieved by maintaining the same and as small a spacing as possible between the line and the cooling body, in which an optimized heat exchange between the two components and thus cooling of the pump itself can take place. This enables cooling of the pressure chamber inlet line and in particular the pressure chamber outlet line, wherein the pressure chamber outlet line generally has a higher temperature than the pressure chamber inlet line due to the heat generated during the compression of the fluid. It can therefore be advantageous if in particular the pressure chamber outlet line has a smaller spacing relative to the cooling body block for effective cooling, and extends parallel to it as long as possible.

[0027] The two lines can be embedded in the housing of the pump, arranged in a recess on the side of the housing facing the cooling body block or arranged directly in the cooling body block. A more efficient heat transfer and thus more efficient cooling can be achieved by a smaller spacing of the lines relative to the cooling body block. The greater the temperature difference between the lines and the housing or the cooling body block, the more efficient the heat transfer can be designed.

[0028] According to one embodiment of the invention, it can be provided that the pressure chamber inlet line and / or the pressure chamber outlet line extend parallel to the pressure chamber. Such an arrangement enables effective heat transfer due to the proximity of the components and the large contact area that accompanies this. For an effective heat transfer, it can therefore be advantageous if the pressure chamber inlet line and / or the pressure chamber outlet line are arranged parallel to the pressure chamber on the one hand and parallel to the cooling body block on the other hand.

[0029] Optionally, it is provided that the extension of the at least one heat pipe has at least one change in direction, so that the at least one heat pipe has as long a contact area as possible between the at least one heat pipe and the cooling body block and / or between the at least one heat pipe and the housing. The larger the contact surface between the at least one heat pipe and the cooling body block on the one hand or the housing on the other hand, the more effectively the heat of the housing can be transferred to the at least one heat pipe and finally the cooling body block. The design of the at least one heat pipe with at least one and preferably multiple changes in direction can achieve such an enlargement of the contact surface, wherein the housing contact area and / or the cooling body contact area have a contact surface that is maximized as much as possible for the cooling body and / or the housing. For this purpose, the at least one heat pipe can have a meandering extension at two sections, which has areas that are oriented parallel to each other if possible. In addition, it is also possible to conceive of spiral, Z-shaped, meandering and other designs of the extension of the at least one heat pipe, which have as large a surface as possible and thus as large a contact area as possible.

[0030] Preferably, the cooling system has at least two heat pipes, wherein the at least two heat pipes are arranged at the at least one cooling body with their cooling body contact areas from two opposite sides. The use of two or more heat pipes contributes to the cooling of the housing by separately transporting the heat away from the housing, wherein a certain amount of heat can flow away from the housing via each heat pipe without the heat pipe being overly loaded. By arranging a plurality of heat pipes at or in the cooling block from different sides, the heat can be evenly distributed to the cooling block, wherein the cooling block has only a small number of areas with different temperatures and thus has an even absorption of heat and also a release of heat. This enables cooling that is as effective and rapid as possible.

[0031] It is also possible and according to the invention optionally to arrange the shell contact area of ​​the at least one heat pipe parallel to the pressure chamber input pipeline and / or the pressure chamber output pipeline. Such a parallel arrangement with the smallest possible spacing between the pipeline and the at least one heat pipe can significantly contribute to more efficient heat removal. In particular, the heat emitted from the pressure chamber output pipeline to the surrounding housing can be emitted to the at least one heat pipe over the shortest possible distance. The smaller the spacing and the greater the parallel extension, the more heat can be transferred here. The at least one heat pipe can be arranged completely or partially parallel to the pipeline with its shell contact area, wherein the at least one heat pipe can also be arranged, for example, spirally around two pipelines or around one of the pipelines.

[0032] Preferably, it is provided that the shell contact area of ​​the at least one heat pipe is arranged between the pressure chamber input line and / or the pressure chamber output line and the pressure chamber. During operation of the pump, most of the heat is generated in or at the pressure chamber, wherein the pressure chamber usually has the largest amount of heat and thus the largest load together with the pressure chamber output line. It can therefore be considered particularly advantageous that the shell contact area of ​​the at least one heat pipe abuts against these areas as closely as possible with a large contact surface. In a design of the cooling system, the shell contact area of ​​the at least one heat pipe can be arranged between the pressure chamber and the pressure chamber input line and / or the pressure chamber output line, wherein the cooling body contact area of ​​the at least one heat pipe is arranged in a cooling body recess of the cooling body.

[0033] In an advantageous embodiment of the invention, it is provided that the pump is a diaphragm pump. The cooling system according to the invention can be used in a particularly advantageous manner in a diaphragm pump and in this case the advantages already mentioned can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Further advantageous embodiments of the pump with cooling system are explained according to the exemplary embodiments shown in the drawings.

[0035] Figure 1 An embodiment of a pump according to the invention is shown with a cooling system for cooling the housing of the pump and with a horizontally arranged heat pipe,

[0036] Figure 2 A design of a vertically arranged pump with a heat pipe according to the present invention is shown.

[0037] Figure 3 A design of a pump according to the invention with a radially configured heat pipe is shown.

[0038] Figure 4 A design of a pump with an arc-shaped housing contact area of ​​a heat pipe according to the present invention is shown.

[0039] Figure 5 A design scheme of the shell contact area of ​​the meandering design of the heat pipe is shown.

[0040] Figure 6 A design of a pump is shown, in which a plurality of heat pipes are arranged on the cooling body from opposite sides.

[0041] Figure 7 A design variant of the housing contact region of the heat pipe in a circular recess is shown,

[0042] Figure 8 A design variant of the housing contact region of the heat pipe in a semicircular recess is shown,

[0043] Fig. 9 A design variant of the housing contact region of a heat pipe in a rectangular recess is shown,

[0044] Fig.10 An alternative design variant of the housing contact region of the heat pipe in the rectangular recess is shown,

[0045] Fig.11 The housing contact region is shown to be arranged in the pressure chamber housing region,

[0046] Fig.12 It is shown that the housing contact region is arranged in the pressure chamber housing region at a contact surface with the pressure chamber line region,

[0047] Fig.13 It is shown that the housing contact area is arranged between the pressure chamber housing area and the pressure chamber line area,

[0048] Fig.14 It is shown that the housing contact region is arranged in the pressure chamber line region at a contact surface with the pressure chamber housing region,

[0049] Fig.15 A design of the shell contact area and the cooling body contact area of ​​the heat pipe is shown, with contact plates arranged therein,

[0050] Fig.16 It is shown that the cooling body contact region is arranged at the contact surface with the cooling body in the pressure chamber line region,

[0051] Fig.17 It is shown that the cooling body contact area is arranged between the pressure chamber pipeline area and the cooling body,

[0052] Fig.18 It is shown that the cooling body contact area is arranged in the cooling body at the contact surface with the pressure chamber pipeline area,

[0053] Fig.19 It is shown that the cooling body contact region is arranged in the pressure chamber line region, wherein it is constructed in one piece with the cooling body,

[0054] Fig. 20 shows that the cooling body contact area is arranged in the cooling body,

[0055] Fig.21 A design of a cooling body contact area with a contact plate is shown,

[0056] Fig. 22 Shown is a cooling body from Fig. 20 Another design variant of

[0057] Fig.23 Shown is a diagram of a device with air flow generation from Fig. 20 A design variation of

[0058] Fig.24 A design variant of a pump with a cooling body and an air flow generating device arranged on the cooling body is shown, and

[0059] Fig.25 A design variant of the cooling body contact region with water cooling is shown. DETAILED DESCRIPTION

[0060] exist Figure 1 1 shows a design according to the invention of a partial area of ​​a pump 1 with a cooling system designed according to the invention. In the figure, some components are shown transparently for increased clarity, which are made of opaque materials, such as metal. The pump 1 is used to convey a fluid through the pump 1, wherein only a small area of ​​the pressure chamber 2 through which the fluid is conveyed is shown. The cooling system removes the heat generated by the operation of the pump 1 from the pump 1 and thereby cools the pump 1 and the fluid conveyed therewith. By cooling the pump 1 and thus indirectly also the fluid conveyed therewith according to the invention, a higher volume flow of the fluid can be conveyed in the case of a comparable design of the pump 1 while the operating temperature of the pump 1 remains the same.

[0061] The pump 1 has a housing 3 which delimits a pressure chamber 2 and has a pressure chamber inlet line 4 and a pressure chamber outlet line 5. Figure 12 and in the subsequent figures, only a part of the pressure chamber 2 is shown. Via a pressure chamber feed line 4 connected to the inlet opening of the pressure chamber 2, the fluid to be conveyed is introduced into the pressure chamber 2 through the inlet opening, is loaded with pressure there by a displacement device (not shown), and then flows out through the outlet opening into the pressure chamber outlet line 5. The housing 3 can be divided into two adjacent areas, which are divided into different extensions with the pressure chamber feed line 4 and the pressure chamber outlet line 5. In the pressure chamber lead-in area 6, the pressure chamber feed line 4 and the pressure chamber outlet line 5 have an extension that leads through the pressure chamber 2 in order to be able to lead through the pressure chamber 2 in the most space-saving way possible and to be able to achieve free structural space as close to the pressure chamber 2 as possible for other components of the cooling system. In the pressure chamber access region 7, the pressure chamber feed line 4 and the pressure chamber outlet line 5 extend substantially perpendicularly to the adjacent surface of the pressure chamber 2 and open into the pressure chamber 2 at a distance from one another. Due to the substantially perpendicular extension in the pressure chamber access region 7, undesired heat absorption by the pressure chamber feed line 4 and the pressure chamber outlet line 5 from the pressure chamber 2 which heats up during operation can be reduced.

[0062] In addition, a cooling body 8 is arranged at the housing 3 in a manner adjacent to the pressure chamber leading area 6. The cooling body 8 has a cooling body block 9 in the form of a block connected to the housing 3 in a heat transfer manner, which has a high thermal conductivity. At the side of the cooling body block 9 facing away from the housing 3, a cooling rib assembly 10 configured as a single piece with the cooling body block 9 is arranged, which has a plurality of cooling ribs 11 configured as a plate. The cooling ribs 11 are arranged parallel to each other and at right angles to the housing 3. When the pump 1 is running, most of the heat is often generated in the pressure chamber 2 and by the compression of the fluid to be transported and the accompanying heating in the pressure chamber outlet pipeline 5. This heat is transferred to the cooling body block 9 arranged at the housing 3 via the housing 3 and finally to each cooling rib 11. By designing the cooling rib 11 as a plate with a surface as large as possible while having a volume as small as possible, it is possible to effectively transfer the heat of the cooling rib 11 to the surrounding air around the cooling rib.

[0063] In order to effectively transfer heat between the housing 3 and the cooling ribs 11, the cooling system has a plurality of heat pipes 12, which have a housing contact area 13 and a cooling body contact area 14 arranged at a distance therefrom. The heat pipe 12 is implemented as a heat pipe 15 here. The heat pipe 15 is configured as a pipe with a circular cross section, wherein other cross sections such as elliptical or flat (flach) shapes may also be envisioned. In the inner space of the closed pipe, a plurality of capillaries and a heat transfer fluid with high thermal conductivity are arranged. In the housing contact area 13, the liquid heat transfer fluid is heated and partially converted into a gas phase here. The gaseous heat transfer fluid diffuses in the entire inner space of the heat pipe 12 and condenses in the cooling body contact area 14 while releasing its heat to the cooling body 8, and therefore returns to its liquid state. The liquid heat transfer fluid is led back to the housing contact area 13 from the cooling body contact area 14 through the capillary.

[0064] Each heat pipe 15 is arranged with a shell contact area 13 in a recess of the shell 3 in the area between the pressure chamber 2 and the pressure chamber input line 4 or the pressure chamber output line 5 and extends parallel to and at right angles to the lines 4, 5. By arranging the shell contact area 13 near the pressure chamber input and output lines 4, 5 and at the pressure chamber 2, heat is absorbed by the heat pipe 15 directly at the place where it is generated and is effectively discharged. The cooling body contact area 14 of the heat pipe 15 is arranged in the cooling body recess of the cooling body 8 and extends parallel to the contact surface of the cooling body 8 with the shell 3 and parallel to the shell contact area 13 of the heat pipe 15. Figure 1 Furthermore, all four heat pipes 15 shown in FIG. 1 run parallel to one another and at a distance from one another and are designed identically to one another.

[0065] The following figures show a comparable embodiment of a pump 1 with a cooling system in respectively different embodiments. In the following, only the essential differences of the individual variants shown in the figures will be discussed.

[0066] Figure 2 and 3 Different embodiments of the arrangement of the heat pipe 15 according to the invention are shown in each case. Figure 2 The heat pipe 15 is arranged as a straight pipe at a right angle to the surface of the housing 3, wherein the heat pipe is arranged in the housing 3 with the housing contact area 13. In addition, the cooling body 8 does not have a cooling body block 9, but the individual cooling ribs 11 are realized as plates arranged in a stacked manner at a distance from each other, which are respectively arranged parallel to the housing 3 and are connected to each other and the housing 3 only through the individual heat pipes 15.

[0067] On the contrary, Figure 3A variant of the radial extension of the heat pipe 15 is shown, wherein the heat pipe 15 is arranged radially in the housing contact area 13 in the pressure chamber inlet area 7. In this way, the heat generated at the pressure chamber 2 and at the outlet opening can be dissipated particularly well. In addition, the cooling ribs 11 are formed in one piece on the housing 3.

[0068] Figure 4 and 5 In addition to from Figure 1 In addition to the linear configuration of the housing contact region 13 of 2 or 3, alternative configurations are shown for the housing contact region 13 or the heat pipe 15 in the housing contact region 13 in an arc-like manner or with a meandering shape.

[0069] Figure 6 Shown from Figure 1 An alternative embodiment of a heat pipe 15 is provided, in which a plurality of heat pipes 15 rest against the cooling rib 8 from two mutually opposite sides and pass through the cooling rib.

[0070] Next Figures 7 to 10 Different design possibilities for the arrangement of the heat pipe 15 in differently designed recesses in the housing 3 are shown in each case. Figure 7 and Fig. 9 as well as Fig.10 The recess in the heat pipe 16 is matched to the design of the heat pipe 15 with a circular cross section or to a rectangular cross section and the heat pipe 15 is flush with the recess 16, and Figure 8 Another design possibility is shown, in which the pressure chamber opening region 7 and the adjacent pressure chamber discharge region 6 of the housing 3 are produced separately from one another and the heat pipe 15 is designed with a circular cross section and is arranged in a semicircular recess 16 in the pressure chamber opening region 7 .

[0071] exist Figures 11 to 15 1 and 2 show different embodiments of the arrangement of the housing contact region 13 in the housing 3 . Fig.11 The housing contact region 13 is shown to be arranged parallel to the pressure chamber inlet and outlet lines 4, 5 in the pressure chamber access region 7, while Fig.12 It is shown that it is arranged in the pressure chamber outlet region 7 at the contact surface with the pressure chamber outlet region 6 . Fig.13 It is shown that the housing contact area 13 is arranged between the pressure chamber lead-in area 6 and the pressure chamber inlet area 7, and Fig.14 It is shown that it is arranged in the pressure chamber introduction region 6 at a contact surface with the pressure chamber outlet region 7 . Fig.15A construction variant is shown in which the housing contact region 13 of the heat pipe 15 is connected to a contact plate 17. In addition, the cooling body contact region 14 also has a contact plate 17 connected thereto. The large surface of such a contact plate 17 enables an efficient heat transfer between the housing 3 and the heat pipe 15 or between the heat pipe 15 and the surrounding air.

[0072] exist Figures 16 to 21 The cooling body contact area 14 of the heat pipe 15 is arranged according to the different designs of the cooling body contact area 14. Fig.16 In the variant of the embodiment of the present invention, the pressure chamber is completely arranged in the pressure chamber introduction area 6 at the contact surface with the cooling body 8, while in Fig.17 In the variant presented in FIG. 8 , the cooling body contact region 14 is arranged between the pressure chamber introduction region 6 and the cooling body 8 . Fig.18 It is shown that the cooling body contact area 14 is arranged in the cooling body 8 in a cooling body recess close to the contact surface with the pressure chamber lead-in area 6. Fig.19 The cooling ribs 11 of the central cooling body 8 are designed in one piece with the housing 3 , wherein the cooling body contact areas 14 are arranged in recesses in the cooling ribs 11 . Fig. 20 It is also shown that the cooling body contact region 14 of the heat pipe 15 is arranged in the cooling rib 11 , wherein in this embodiment variant the cooling rib 11 and the cooling body block 9 are arranged on the housing 3 . Fig.21 A design variant is shown in which the cooling body contact region 14 of the heat pipe 15 is connected to a contact plate 17 .

[0073] Figures 22 to 25 Furthermore, various further possible designs of the pump 1 with a cooling system are shown in order to further increase the cooling capacity. Fig. 22 Shown from Fig.21 A design variant is provided in which the cooling body 8 is arranged on a contact plate 17 . Fig.23 Shown from Fig.21 Another possible design is that an air flow generating device 18 in the form of a fan is arranged on the contact plate 17. By means of the fan, an air flow can be generated which is directed to the contact plate 17 for additional cooling. Fig.24 An embodiment is shown in which an air flow generating device 18 is arranged on the cooling body 8 , wherein the cooling ribs 11 are cooled via the generated air flow. Fig.25 A water cooling device 19 in the form of a water cooling is shown, which is set up to cool the cooling body contact area 14 of the heat pipe 15 .

[0074] Reference Numbers List

[0075] 1 Pump

[0076] 2 Pressure chamber

[0077] 3 Housing

[0078] 4 Pressure chamber input line

[0079] 5 Pressure chamber output pipeline

[0080] 6 Pressure chamber lead area

[0081] 7 Pressure chamber access area

[0082] 8 Cooling body

[0083] 9 Cooling the main block

[0084] 10 Cooling rib assembly

[0085] 11 Cooling ribs

[0086] 12 Heat pipe

[0087] 13 Shell contact area

[0088] 14 Cooling body contact area

[0089] 15 Heat pipe

[0090] 16 Notch for heat pipe

[0091] 17 Contact plate

[0092] 18. Air flow generating device

[0093] 19 Water cooling device

Claims

1. A pump (1) having a housing (3) which limits a pressure chamber (2), wherein the pump (1) has a pressure chamber inlet line (4) and a pressure chamber outlet line (5), the pressure chamber inlet line and the pressure chamber outlet line respectively leading to the pressure chamber (2), wherein a fluid flowing into the pressure chamber (2) via the pressure chamber inlet line (4) can be loaded with pressure via a displacement device displaceably arranged in the pressure chamber (2) and discharged from the pressure chamber (2) via the pressure chamber outlet line (5), and the pump has a cooling system for cooling the housing (2) of the pump (1), characterized in that The cooling system comprises at least one heat pipe (12) with a heat transfer fluid and at least one cooling body (8), wherein the at least one heat pipe (12) comprises a housing contact region (13) for heat-conducting contact of the heat pipe (12) with the housing (2) and a cooling body contact region (14) arranged spaced apart therefrom for heat-conducting contact of the heat pipe (12) with the at least one cooling body (8), wherein heat of the housing (2) is transferred from the housing (2) to the at least one cooling body (8) via the at least one heat pipe (12) when the cooling system is used in accordance with the provisions.

2. The pump (1) according to claim 1, characterized in that The at least one cooling body (8) comprises a cooling body block (9) and a cooling rib assembly (10) connected to the cooling body block (9) in a heat-conductive manner, the cooling rib assembly having a plurality of cooling ribs (11) arranged spaced apart from each other, wherein the heat absorbed by the cooling body block (9) is released to the surrounding air via the cooling ribs (11).

3. The pump (1) according to claim 1 or 2, characterized in that An air flow generating device (18) is arranged on the at least one cooling body (8), wherein an air flow can be generated by means of the air flow generating device (81) for additional cooling of the cooling ribs (11).

4. Pump (1) according to any one of the preceding claims, characterized in that The cooling system has a water cooling device (19) for cooling the cooling body contact area (13) of the at least one heat pipe (12).

5. Pump (1) according to any one of the preceding claims, characterized in that The at least one heat pipe (12) is arranged with the cooling body contact area (14) in a cooling body recess of the cooling body block (9) and is thermally connected to the cooling body block (9).

6. Pump (1) according to any one of the preceding claims, characterized in that The cooling body contact area (14) of the at least one heat pipe (12) is thermally connected to a contact plate (17), wherein the contact plate (7) has a high thermal conductivity of more than 200 W / m·K and in particular more than 300 W / m·K, and wherein the contact plate (17) can be cooled by means of the air flow generating device (18) or connected to the at least one cooling body (8).

7. Pump (1) according to any one of the preceding claims, characterized in that The cooling ribs (11) are arranged parallel to the surface of the housing (3).

8. Pump (1) according to any one of the preceding claims, characterized in that The cooling ribs (11) are arranged at a certain angle to the surface of the housing (3).

9. Pump (1) according to any one of the preceding claims, characterized in that The pressure chamber inlet line (4) and / or the pressure chamber outlet line (5) extend parallel to the cooling body block (9) over as large an area as possible and / or are partially embedded therein.

10. Pump (1) according to any one of the preceding claims, characterized in that The pressure chamber inlet line (4) and / or the pressure chamber outlet line (5) extend parallel to the pressure chamber (2).

11. Pump (1) according to any one of the preceding claims, characterized in that The extension of the at least one heat pipe (12) has at least one direction change, so that the at least one heat pipe (12) has a contact area as long as possible between the at least one heat pipe (12) and the cooling body block (9) and / or between the at least one heat pipe (12) and the shell (3).

12. Pump (1) according to any one of the preceding claims, characterized in that The cooling system has at least two heat pipes (12), wherein the at least two heat pipes (12) are arranged with their cooling body contact areas (14) at the at least one cooling body (8) from two opposite sides.

13. Pump (1) according to any one of the preceding claims, characterized in that The shell contact region (13) of the at least one heat pipe (12) is arranged parallel to the pressure chamber inlet line (4) and / or the pressure chamber outlet line (5).

14. A pump according to any one of the preceding claims, characterised in that The shell contact region (13) of the at least one heat pipe (12) is arranged between the pressure chamber inlet line (4) and / or the pressure chamber outlet line (5) and the pressure chamber (2).

15. Pump (1) according to any one of the preceding claims, characterized in that The pump (1) is a diaphragm pump.

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