WO2023237478A1 - Kühlanordnung zum kühlen einer maschine und verfahren hierzu - Google Patents
Kühlanordnung zum kühlen einer maschine und verfahren hierzu Download PDFInfo
- Publication number
- WO2023237478A1 WO2023237478A1 PCT/EP2023/064965 EP2023064965W WO2023237478A1 WO 2023237478 A1 WO2023237478 A1 WO 2023237478A1 EP 2023064965 W EP2023064965 W EP 2023064965W WO 2023237478 A1 WO2023237478 A1 WO 2023237478A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- machine
- cooling
- cooling circuit
- hall
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
- B23Q11/141—Methods or arrangements for maintaining a constant temperature in parts of machine tools using a closed fluid circuit for cooling or heating
Definitions
- Cooling arrangement for cooling a machine and method therefor
- the present invention relates to a cooling arrangement for cooling a machine, in particular a machine tool, in a machine hall, a machine with such a cooling arrangement, a machine arrangement in a machine hall with a plurality of machines and a method for operating a machine with a cooling arrangement.
- the cooling arrangement according to the invention for cooling a machine, in particular a machine tool, in a machine hall comprises a first cooling circuit and a second cooling circuit.
- the first cooling circuit is set up to cool at least one area of the machine, for example a work area, a main spindle, drive motors or a tool magazine.
- the second cooling circuit is connected to a machine cooler, which releases heat into the machine hall.
- the machine cooler can stand next to the machine or be integrated into the machine housing.
- a first heat exchanger is arranged between the first cooling circuit and the second cooling circuit in order to transfer heat between the first and second cooling circuits.
- the heat is transferred from the first cooling circuit to the second cooling circuit.
- the cooling arrangement comprises a second heat exchanger, through which the first cooling circuit can flow and which has a first and second connection.
- the first and second ports are configured to be connected to a third cooling circuit that communicates with an ambient cooler outside the machine shop.
- heat which is dissipated, for example, from the machine via the first cooling circuit
- heat to be dissipated either via the first heat exchanger and second cooling circuit to a machine cooler or, alternatively, via the second heat exchanger and a third cooling circuit to an environment outside the machine hall becomes.
- the heat given off by the machine it is therefore possible for the heat given off by the machine to be used, for example, to heat the machine hall (operating mode 1).
- a temperature in the machine hall can also be kept as constant as possible, since the heat generated by the machine can be released to the environment via the third cooling circuit (operating mode 2). This means that heat that is given off by the machine to a machine cooler in the machine hall does not have to be dissipated via an additional air conditioning system in the machine hall, which would lead to significantly increased energy consumption.
- the machine cooler is preferably a compressor cooler or a compressor cooler.
- the cooling arrangement can therefore be operated in two operating modes, namely in a first operating mode in which the heat of the machine is released into the machine hall in order to heat the machine hall and in a second operating mode in which the heat is released outside the machine hall.
- the first and second heat exchangers are arranged in series in the first cooling circuit and the first cooling circuit flows through them one after the other in this order. This makes it possible to provide a cooling arrangement with reduced control effort.
- the cooling arrangement includes a 2/3-way valve and a branch line which leads the first cooling circuit to the second heat exchanger.
- the first cooling circuit can be switched in such a way that the first cooling circuit runs through the first heat exchanger or the second heat exchanger in the branch line. This makes it possible to easily switch between the two operating modes of the cooling arrangement by switching the 2/3-way valve.
- the two heat exchangers are therefore connected in parallel and can only be flowed through individually.
- the third cooling circuit connects the second heat exchanger with the ambient cooler outside the machine hall.
- the ambient cooler is particularly preferably located in an external environment (environment) to which heat can be given off if necessary.
- the cooling arrangement further comprises a temperature sensor in the machine hall and a control unit.
- the control unit is set up to switch the 2/3-way valve depending on a temperature in the machine hall determined by the temperature sensor and/or is set up to switch the machine cooler and/or the ambient cooler on and off depending on the temperature determined by the temperature sensor.
- a switchable and switchable additional cooler is arranged in the third cooling circuit, which is set up to cool hall air in the machine hall.
- the additional cooler can therefore remove heat from the machine hall and deliver it to an area outside the machine hall via the third cooling circuit and the ambient cooler.
- the first and second heat exchangers are each a plate heat exchanger.
- the first and second heat exchangers are preferably arranged in the first cooling circuit in the return line from the machine or, alternatively, arranged in the flow of the first cooling circuit to the machine.
- control unit is set up to switch the machine cooler and/or the ambient cooler on and off after a predetermined time interval has elapsed. This can prevent the machine cooler and/or ambient cooler from being switched on and off too frequently. which, if designed as a compressor cooler with refrigerant, could be damaged as a result.
- the present invention further relates to a machine, in particular a machine tool, with a cooling arrangement according to the invention.
- the machine is preferably a machine tool for high-precision machining.
- the invention further relates to a machine arrangement in a machine hall with a large number of machines according to the invention.
- the present invention relates to a method for operating a machine, in particular a machine tool, with a cooling arrangement according to the invention, wherein heat generated by the machine is absorbed by means of a first cooling circuit and delivered to a second cooling circuit for heating the machine hall or to a third cooling circuit the heat absorbed from the first cooling circuit is released to an environment outside the machine hall.
- a cooling arrangement according to the invention, wherein heat generated by the machine is absorbed by means of a first cooling circuit and delivered to a second cooling circuit for heating the machine hall or to a third cooling circuit the heat absorbed from the first cooling circuit is released to an environment outside the machine hall.
- each machine preferably has its own cooling arrangement, with each cooling arrangement preferably being able to be controlled individually. This makes it possible for some cooling arrangements of the machines to heat the machine hall and other cooling arrangements to release the heat absorbed by the machines via the third cooling circuit to the environment outside the machine hall.
- the machine hall has a heating and/or air conditioning system and the third cooling circuit of the cooling arrangement is part of this heating and/or air conditioning system.
- the cooling arrangement can be integrated into an existing heating and/or air conditioning system and can be controlled in conjunction with the heating and/or air conditioning system.
- the heating and/or air conditioning system is controlled depending on an operating mode of the cooling arrangement and is in particular switched off if the machine hall can only be controlled by the cooling arrangements of the machines and additional heating or cooling by the heating and/or air conditioning system is not required .
- a machine hall can be tempered with significantly reduced energy costs.
- a control unit preferably has an input for determining the heating requirement of the machine hall, which is possible for example by means of the temperature sensor, very good temperature control of the machine hall can be made possible. For example, if a temperature value falls below a predetermined threshold value, the cooling arrangement is switched to the first operating mode, so that Waste heat from the machine is released to the machine hall via the machine cooler(s) (operating mode 1).
- the cooling arrangement is switched to the second operating mode, so that the waste heat from the machine is dissipated via the third cooling circuit to an environment outside the machine hall (operating mode 2). So that there is no frequent switching between the two operating modes, the switching can also be controlled using two slightly different threshold values, so that a hysteresis is created.
- the temperature for switching to the first operating mode is slightly lower than the temperature for switching to the second operating mode. This ensures that after switching to the first operating mode, it takes some time until the machine hall has warmed up again so that the upper threshold value is reached and the cooling arrangement can be switched to the second operating mode.
- the control of the cooling arrangement can also be made possible via a control of a heating and/or air conditioning system for the machine hall. If the heating and/or air conditioning system for the machine hall reports a heating requirement, the cooling arrangement can be switched to the first operating mode. If there is no need for heating, the cooling arrangement is switched to the second operating mode.
- a hysteresis can also be provided when connected to the heating and/or air conditioning system, which can be achieved, for example, by a time delay when switching between the first operating mode and the second operating mode.
- the invention Since the energy of the waste heat from individual machines, i.e. a waste heat output, is usually significantly lower than the power requirement for heating or cooling the machine hall, the invention is particularly interesting if as many machines as possible in the machine hall are included in this method and with the invention Cooling arrangements are equipped. What is particularly advantageous is that the machines and their cooling arrangements are often evenly distributed throughout the hall. If all machines in the machine hall with their cooling arrangements are set up for the method according to the invention, in the first operating mode the waste heat is released relatively evenly across the machine hall. The energy-intensive promotion of tempered air, as is the case in the prior art, is no longer necessary because the waste heat from the machines is already well distributed throughout the hall by the machine's own cooling arrangements.
- a separate central control can be provided, which is connected to all cooling arrangements of the machines in the machine hall and the heating and / or air conditioning system and / or is connected to temperature sensors that detect the temperature in the machine hall. The central control then takes over the control of the individual cooling arrangements on the machines and successively switches them between the two operating modes. In this way, heating power from the waste heat of the machines can be switched on and off step by step relatively easily.
- Special features of the machine hall in which the machines are installed can also be taken into account. For example, if the temperature in the machine hall along a window front is lower than in the other parts of the hall due to heat loss from the machine hall through the windows, the central control can ensure that the machines that are set up along such a window front are preferred in the first operating mode can be switched. In addition, it can be advantageous for the central control to ensure that the cooling arrangements on one side of the hall are not operated in the first operating mode, while on another side of the hall the machines are operated in the second operating mode, because this leads to one could lead to uneven temperature control in the hall.
- the central control is set up so that during a mixed operation, in which some cooling arrangements are operated in the first operating mode and other cooling arrangements are operated in the second operating mode, the cooling arrangements running in the first and second operating modes each operate evenly the machine hall are distributed.
- several temperature sensors are distributed in the machine hall, which record the local hall temperature in different areas of the machine hall.
- a central control can then specifically use the switching of the cooling arrangements between the first and second operating modes on the individual machines in order to compensate for temperature differences in the hall.
- cooler areas of the machine hall several cooling arrangements of the machines can then be operated in the first operating mode in order to warm up this area.
- the cooling arrangements of the machines can then be operated in the second operating mode in order to cool down this area.
- not all cooling arrangements of the individual machines are constructed the same, but rather the respective cooling arrangements are tailored in terms of their performance to the cooling requirements of the respective machine.
- FIG. 1 shows a schematic representation of a cooling arrangement with a machine in a machine hall according to a first preferred embodiment of the invention
- Fig. 2 is a schematic representation of the machine hall from Fig. 1,
- FIG. 3 is a diagram showing a temperature T over time t in the machine hall of FIG. 1,
- FIG. 4 shows a schematic representation of a cooling arrangement with a machine in a machine hall according to a second preferred embodiment of the invention.
- Fig. 5 is a schematic representation of a cooling arrangement with a machine in a machine hall according to a third preferred embodiment of the invention.
- a cooling arrangement 1 according to a first preferred exemplary embodiment of the invention will be described in detail below with reference to FIGS. 1 to 3.
- Fig. 2 shows schematically the structure of a machine hall 2, in which several machines M1, M2, M3 are shown.
- the structure of a cooling arrangement of the machine M1 is shown as an example in FIG.
- the machine M1 is a machine tool with a spindle 16 for ultra-fine machining of workpieces. This generates heat, which is dissipated by means of the cooling arrangement 1 according to the invention and the method according to the invention.
- the cooling arrangement 1 includes a first cooling circuit 11, which is set up to cool an area of the machine near the spindle 16.
- the first cooling circuit 11 includes a tank 21 filled with coolant 24, in which a pump 22 for conveying the coolant 24 is arranged.
- the pump 22 is driven by a drive 23.
- the first cooling circuit 11 includes an inlet 11a, which leads from the pump 22 into the machine M1, and a return line 11b, which leads away from the machine M1.
- a 2/3-way valve 7 is arranged in the further course of the first cooling circuit. Starting from the 2/3-way valve 7, the return line 11b leads to a first heat exchanger 4 and a branch line 11c leads to a second heat exchanger 5. From the first heat exchanger 4 or from the second heat exchanger 5, the first cooling circuit 11 goes back into the tank 21.
- the cooling arrangement 1 further comprises a second cooling circuit 12, which is connected to a machine cooler 3. The machine cooler 3 outside the machine M1 is set up to release heat into the machine hall 2.
- the second cooling circuit 12 is guided through the first heat exchanger 4, such that the first heat exchanger 4 transfers heat, which was released from the machine M1 into the first cooling circuit 11, to the second cooling circuit 12.
- the second heat exchanger through which the first cooling circuit 11 flows when the 2/3-way valve 7 is in the appropriate position, has a first connection 51 and a second connection 52, which are set up for connection to a third cooling circuit 13.
- the third cooling circuit 13 is connected to an ambient cooler 6 outside the machine hall 2.
- the ambient cooler 6 can give off heat to an environment 8.
- first and second heat exchangers 4, 5 are arranged parallel to one another and are flowed through individually depending on the position of the 2/3-way valve.
- control unit 10 is provided to control the cooling arrangement 1.
- the control unit 10 is connected to the 2/3-way valve 7 and to temperature sensors 9, which are arranged in the machine hall 2. Temperature sensors 9 detect a hall temperature, which is used as a control variable for controlling the cooling arrangement 1.
- a central control 10 can be provided for all cooling arrangements of the three machines M1, M2, M3.
- the control unit 10 also controls a heating and/or air conditioning system 15, which may also be used to control the temperature of the hall in addition to the cooling arrangement according to the invention.
- each machine M1, M2, M3 is controlled in a first operating mode or a second operating mode.
- the cooling arrangements of the three machines M1, M2, M3 can each be individually controlled.
- Fig. 3 shows schematically a temperature curve K of the hall temperature T over time t.
- a starting temperature To lies between a predetermined minimum temperature Tmin and a predetermined maximum temperature Tmax.
- the control unit 10 now operates the cooling arrangement 1. In the area between Tmin and Tmax, the heating and/or air conditioning system can remain switched off (FIG. 3, area A).
- cooling arrangements of the machines M1, M2, M3 are gradually switched to the second operating mode.
- the control unit 10 switches the cooling arrangements of the machines M1, M2, M3 into the second operating mode, in which the 2/3-way valve 7 is designed such that the medium flowing back from the return line 11b is guided into the branch line 11c. This results in heat transfer from the first cooling circuit 11 to the third cooling circuit 13, so that the heat can then be released via the ambient cooler 6 to the environment outside the machine hall.
- a cooling process must be carried out by the heating and/or air conditioning system 15 to reduce the temperature in the machine hall.
- the heating and/or air conditioning system 15 is switched on by the control unit 10 in order to cool the machine hall 2. This is indicated in FIG. 3 by area B.
- the heating and / or air conditioning system 15 can be switched off again and the temperature control in the machine hall 2 by switching the cooling arrangements 1 of the machines M1 , M2, M3 between operating mode 1 and operating mode 2.
- the 2/3-way valve 7 is switched in such a way that the first cooling circuit 11 only leads through the first heat exchanger 4, so that the heat can be released into the machine hall 2 via the machine cooler 3.
- the heating output by the machine coolers 3 of the machines M 1 , M2, M3 in the first operating mode may not be sufficient, so that the heating and/or air conditioning system 15 must be switched on in order to heat (area D).
- the temperature curve reaches the minimum temperature T min again, so that the heating and/or air conditioning system 15 that is switched on to provide support can be switched off again.
- the heat generated in a machine can either be used to heat the machine hall (first operating mode) or by transferring the heat absorbed from the machine via the third cooling circuit 13 and the ambient cooler 6 to an environment 8 outside the Machine hall 2 is delivered, support for the heating and / or air conditioning system 15 can be achieved, resulting in significant energy savings in the heating and / or Air conditioning 15 leads.
- the heating and/or air conditioning system 15 can be completely switched off and the temperature control of the machine hall 2 can be carried out exclusively by switching the cooling arrangements 1 between the first and second operating modes.
- Fig. 4 shows a cooling arrangement 1 according to a second embodiment of the invention.
- the same or functionally identical parts are designated with the same reference numbers as in the first exemplary embodiment.
- the first cooling circuit 11 is designed differently in the second exemplary embodiment.
- the first heat exchanger 4 and the second heat exchanger 5 are arranged in series in the first cooling circuit 11.
- the first heat exchanger 4 is arranged in front of the second heat exchanger 5 in the direction of flow. If the machine hall 2 is to be heated, the machine cooler 3 is operated, so that heat that was absorbed by the machine M1 in the first cooling circuit 11 is transferred to the second cooling circuit 12 in the heat exchanger 4 and can be released from the machine cooler 3 to the machine hall 2 .
- the ambient cooler 6 can remain switched off since no more heat has to be removed from the first cooling circuit 11 in the heat exchanger 5.
- the machine cooler 3 is switched off, so that the heat absorbed from the machine M 1 is simply passed through the first heat exchanger 4 in the first cooling circuit 11 and is then transferred to the third cooling circuit 13 in the second heat exchanger 5.
- the ambient cooler 6 must be switched on. As a result, the heat absorbed can be removed from the machine hall 2 via the third cooling circuit 13 and the ambient cooler 6 and released into the environment 8.
- FIG. 5 shows a cooling arrangement 1 according to a third exemplary embodiment of the invention, in which identical or functionally identical parts are again designated with the same reference numerals.
- the cooling arrangement 1 of the third exemplary embodiment of FIG. 5 is constructed essentially in the same way as the cooling arrangement 1 of the first exemplary embodiment, with the first and second heat exchangers 4, 5 being arranged in parallel and being switched via the 2/3-way valve 7.
- an additional cooler 14 is arranged in a return line of the third cooling circuit 13.
- the additional cooler 14 can be switched on and off by the control unit 10 and is set up to cool the hall air in the machine hall 2. This allows the additional cooler 14 to absorb heat from the hall air and via the return of the third cooling circuit 13 to the ambient cooler 6 lead and release it to the environment 8.
- the heat absorption by the additional cooler 14 is indicated by the arrow Q in FIG. Otherwise, this exemplary embodiment corresponds to the first exemplary embodiment, so that reference can be made to the description given there.
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- Mechanical Engineering (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23731998.3A EP4536438A1 (de) | 2022-06-09 | 2023-06-05 | Kühlanordnung zum kühlen einer maschine und verfahren hierzu |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022114550.6A DE102022114550B3 (de) | 2022-06-09 | 2022-06-09 | Kühlanordnung zum Kühlen einer Maschine und Verfahren hierzu |
| DE102022114550.6 | 2022-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023237478A1 true WO2023237478A1 (de) | 2023-12-14 |
Family
ID=86861776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/064965 Ceased WO2023237478A1 (de) | 2022-06-09 | 2023-06-05 | Kühlanordnung zum kühlen einer maschine und verfahren hierzu |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4536438A1 (de) |
| DE (1) | DE102022114550B3 (de) |
| WO (1) | WO2023237478A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2091314A2 (de) * | 2008-02-13 | 2009-08-19 | Hitachi Plant Technologies, Ltd. | Kühlsystem für ein elektronisches Gerät |
| WO2012003895A1 (de) * | 2010-07-06 | 2012-01-12 | Sam Technologies Gmbh | System und verfahren zur kühlung einer rechenanlage |
| CN110682156A (zh) * | 2019-09-18 | 2020-01-14 | 珠海格力电器股份有限公司 | 主轴油冷却系统、主轴油温度控制方法和机床冷却机系统 |
| EP3984619A1 (de) * | 2019-07-19 | 2022-04-20 | Daikin Industries, Ltd. | Kühlvorrichtung und ölkühlvorrichtung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008009513A1 (de) | 2008-02-15 | 2009-08-20 | Emag Holding Gmbh | Werkzeugmaschine mit Kühleinrichtung |
| DE102011116602A1 (de) | 2011-10-21 | 2013-04-25 | Robert Bosch Gmbh | Produktionsanlage |
-
2022
- 2022-06-09 DE DE102022114550.6A patent/DE102022114550B3/de active Active
-
2023
- 2023-06-05 EP EP23731998.3A patent/EP4536438A1/de active Pending
- 2023-06-05 WO PCT/EP2023/064965 patent/WO2023237478A1/de not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2091314A2 (de) * | 2008-02-13 | 2009-08-19 | Hitachi Plant Technologies, Ltd. | Kühlsystem für ein elektronisches Gerät |
| WO2012003895A1 (de) * | 2010-07-06 | 2012-01-12 | Sam Technologies Gmbh | System und verfahren zur kühlung einer rechenanlage |
| EP3984619A1 (de) * | 2019-07-19 | 2022-04-20 | Daikin Industries, Ltd. | Kühlvorrichtung und ölkühlvorrichtung |
| CN110682156A (zh) * | 2019-09-18 | 2020-01-14 | 珠海格力电器股份有限公司 | 主轴油冷却系统、主轴油温度控制方法和机床冷却机系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022114550B3 (de) | 2023-10-12 |
| EP4536438A1 (de) | 2025-04-16 |
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