CN110243097B - Machine tool cooling unit and control method thereof - Google Patents
Machine tool cooling unit and control method thereof Download PDFInfo
- Publication number
- CN110243097B CN110243097B CN201910532916.4A CN201910532916A CN110243097B CN 110243097 B CN110243097 B CN 110243097B CN 201910532916 A CN201910532916 A CN 201910532916A CN 110243097 B CN110243097 B CN 110243097B
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- Prior art keywords
- machine tool
- refrigerant
- heat recovery
- water return
- cooling unit
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- 238000001816 cooling Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims abstract description 107
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000011084 recovery Methods 0.000 claims abstract description 62
- 239000000110 cooling liquid Substances 0.000 claims abstract description 26
- 239000002918 waste heat Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
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- 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
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The application provides a machine tool cooling unit and a control method of the machine tool cooling unit. The machine tool cooling unit comprises a refrigerant system and a cooling system. The refrigerant system comprises a compressor, a condenser, a throttling element, an evaporator, a heat recovery refrigerant pipeline, a heat recovery device and a second water return pipeline. The inlet of the heat recovery refrigerant pipeline is connected with the first refrigerant pipeline, the outlet of the heat recovery refrigerant pipeline is connected with the second refrigerant pipeline, the heat recoverer is arranged on the heat recovery refrigerant pipeline, and the second water return pipeline returns water from the machine tool, exchanges heat with the refrigerant in the heat recovery refrigerant pipeline through the heat recoverer and flows to the machine tool. By applying the technical scheme of the application, the condensing waste heat is utilized to heat the cooling liquid in the water return pipeline, so that the load can be increased, the machine tool cooling unit can continuously operate, the temperature of the cooling liquid can be increased under the condition of low ring temperature, and the use requirement of the machine tool can be met.
Description
Technical Field
The application relates to the technical field of refrigeration equipment, in particular to a machine tool cooling unit and a control method of the machine tool cooling unit.
Background
The machine tool cooling unit is a special air conditioning device for providing cooling water and cooling oil for a machine tool, and has an important function in modern precision machining and manufacturing. The machine tool cooling unit is different from a common air conditioning unit, and needs high temperature control precision and continuous operation capability under the condition of low load, so that the precision machining requirements of various machine tools can be met.
The existing machine tool cooling unit generally uses a variable frequency compressor, and the frequency can be adjusted according to the load of the machine tool cooling unit so as to meet the requirements of a machine tool. However, no matter how good the variable frequency compressor is used, the machine tool cooling unit still has the limit of the minimum load, when the load is in lower condition, the machine tool cooling unit often needs to be stopped, the liquid temperature can rise, and the temperature balance can be established only after a period of time, so that the water temperature fluctuation is larger, and the control of the machining precision of the machine tool is not facilitated.
On the other hand, when the ambient temperature is lower than the required water temperature, the machine tool cooling unit cannot be started at normal temperature, and the set liquid temperature must be controlled to be lower than the ambient temperature, but the use requirement of the machine tool cannot be met, and if electric heating is additionally used, energy consumption is relatively high.
Disclosure of Invention
The embodiment of the application provides a machine tool cooling unit and a control method of the machine tool cooling unit, which are used for solving the technical problem that the machine tool cooling unit in the prior art cannot meet the use requirement of a machine tool under low load and low environment temperature.
The embodiment of the application provides a machine tool cooling unit, which comprises: refrigerant system, refrigerant system includes: the device comprises a compressor, a condenser, a throttling element and an evaporator, wherein the exhaust end of the compressor is connected with the condenser through a first refrigerant pipeline, the condenser is connected with a first refrigerant interface of the evaporator through a second refrigerant pipeline, the second refrigerant interface of the evaporator is connected with the air suction end of the compressor through a third refrigerant pipeline, and the throttling element is arranged on the second refrigerant pipeline; the cooling system comprises a first water return pipeline, and the first water return pipeline returns water from the machine tool, exchanges heat through the evaporator and flows to the machine tool; the machine tool cooling unit further comprises: the inlet of the heat recovery refrigerant pipeline is connected with the first refrigerant pipeline, and the outlet of the heat recovery refrigerant pipeline is connected with the second refrigerant pipeline; the heat recoverer is arranged on the heat recovery refrigerant pipeline; and the second water return pipeline returns water from the machine tool, exchanges heat with the refrigerant in the heat recovery refrigerant pipeline through the heat recovery device and flows to the machine tool.
In one embodiment, the second water return line merges with the first water return line and flows to the machine tool.
In one embodiment, the machine tool cooling unit further comprises a liquid tank to which the second water return line and the first water return line merge, the liquid tank being for supplying cooling liquid to the machine tool.
In one embodiment, the machine tool cooling unit further comprises a water pump connected at the junction of the second water return line and the first water return line.
In one embodiment, the outlet of the heat recovery refrigerant line is upstream of the throttling element on the second refrigerant line.
In one embodiment, a first control valve is provided on the heat recovery refrigerant line, the first control valve being used to control operation of the heat recovery refrigerant line.
In one embodiment, a second control valve is provided on the second water return line, the second control valve being used to control operation of the second water return line.
In one embodiment, the condenser is an air-cooled condenser.
The application also provides a control method of the machine tool cooling unit, which is used for controlling the machine tool cooling unit and comprises the following steps: a low load operation mode, when the compressor frequency reaches a first preset frequency value, if the actual temperature of the cooling liquid flowing to the machine tool is lower than a first preset temperature value of the set temperature, operating a heat recovery refrigerant pipeline and a second water recovery pipeline; and when the frequency of the compressor reaches a second preset frequency value, closing the heat recovery refrigerant pipeline and the second water return pipeline, wherein the second preset frequency value is larger than the first preset frequency value.
In one embodiment, the control method includes a waste heat compensation mode in which: when the set temperature of the cooling liquid flowing to the machine tool is higher than the ambient temperature, a heat recovery refrigerant pipeline and a second water return pipeline are operated; and when the set temperature of the cooling liquid flowing to the machine tool is lower than the ambient temperature, closing the heat recovery refrigerant pipeline and the second water return pipeline.
In one embodiment, a control method includes: when the set temperature is higher than the ambient temperature, if the controller judges that the condition of starting the machine tool cooling unit cannot be met, the set temperature is set to be a second preset temperature value lower than the ambient temperature, and the machine tool cooling unit is started.
In the embodiment, the condensing waste heat is utilized to heat the cooling liquid in the water return pipeline, so that the load can be increased, the machine tool cooling unit can continuously operate, the temperature of the cooling liquid can be increased under the condition of low ring temperature, and the use requirement of a machine tool can be met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 is a schematic structural view of an embodiment of a machine tool cooling unit according to the present application.
Detailed Description
The present application will be described in further detail with reference to the following embodiments and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. The exemplary embodiments of the present application and the descriptions thereof are used herein to explain the present application, but are not intended to limit the application.
Fig. 1 shows an embodiment of the machine tool cooling unit of the present application, comprising a refrigerant system and a cooling system. The refrigerant system comprises a compressor 10, a condenser 20, a throttling element 30 and an evaporator 40, wherein an exhaust end of the compressor 10 is connected with the condenser 20 through a first refrigerant pipeline 51, a first refrigerant interface of the condenser 20 and the evaporator 40 is connected with a second refrigerant pipeline 52, a second refrigerant interface of the evaporator 40 is connected with a suction end of the compressor 10 through a third refrigerant pipeline 53, and the throttling element 30 is arranged on the second refrigerant pipeline 52. The cooling system includes a first water return line 61, the first water return line 61 returning water from the machine tool and exchanging heat through the evaporator 40 to the machine tool. To overcome the deficiencies in the prior art, the machine tool cooling unit of the present embodiment further includes a heat recovery refrigerant line 54, a heat recovery 70, and a second water return line 62. An inlet of the heat recovery refrigerant line 54 is connected with the first refrigerant line 51, an outlet of the heat recovery refrigerant line 54 is connected with the second refrigerant line 52, a heat recoverer 70 is arranged on the heat recovery refrigerant line 54, and the second water return line 62 returns water from the machine tool, exchanges heat with the refrigerant in the heat recovery refrigerant line 54 through the heat recoverer 70 and flows to the machine tool.
In a normal operation state, the heat recovery refrigerant line 54 and the second water return line 62 are closed, the refrigerant enters the condenser 20 from the exhaust end of the compressor 10 through the first refrigerant line 51 to release heat, then enters the evaporator 40 through the second refrigerant line 52 through the throttling element 30 to flow, the first water return line 61 returns water from the machine tool and exchanges heat through the evaporator 40, the cooling fluid flows to the machine tool for cooling, and the refrigerant flowing out of the evaporator 40 returns to the suction end of the compressor 10 through the third refrigerant line 53.
When the load of the machine tool cooling unit is insufficient or the temperature of the cooling zone is required to be higher than the ambient temperature, the heat recovery refrigerant pipeline 54 and the second water return pipeline 62 are operated, compared with the normal working state, part of the refrigerant in the first refrigerant pipeline 51 flows into the heat recovery refrigerant pipeline 54 to be led to the heat recovery device 70, the cooling liquid in the second water return pipeline 62 flows through the heat recovery device 70 to exchange heat with the high-temperature refrigerant in the heat recovery refrigerant pipeline 54, then the cooling liquid in the second water return pipeline 62 is supplied to the machine tool, and the refrigerant in the heat recovery refrigerant pipeline 54 is supplied to the evaporator 40. Thus, through the operation of the heat recovery refrigerant pipeline 54 and the second water return pipeline 62, on one hand, the load can be increased, the normal operation of the machine tool cooling unit can be maintained, the machine tool cooling unit can not be stopped, and the temperature control precision meets the use requirement of low load; on the other hand, when the ambient temperature is low, the excess heat generated by the compressor 10 can be used to provide heat to balance the temperature of the coolant supplied to the machine tool, thereby ensuring the machining accuracy of the machine tool.
According to the technical scheme, the problem that the cooling liquid temperature cannot be accurately controlled due to the fact that the machine tool cooling unit is stopped under the low-load working condition in the past is solved, the problem that the use requirement of the machine tool cannot be met under the low-ring temperature or the condition that the high cooling liquid temperature is required is solved, electric heating is not required to be additionally used, and the machine tool cooling unit is safe and convenient.
In the embodiment of the present application, the coolant in the first water return line 61 and the second water return line 62 may be cooling water or cooling oil.
As shown in fig. 1, in the technical solution of the present embodiment, the second water return line 62 and the first water return line 61 converge and flow to the machine tool, and the cooling liquid with a higher temperature in the second water return line 62 is mixed with the cooling liquid with a lower temperature in the first water return line 61, so as to finally obtain the cooling liquid with a preset temperature, so as to facilitate the use of the machine tool. When the second water return line 62 and the first water return line 61 converge, the opening degree of the lines may be adjusted so that the mixed cooling liquid satisfies a preset temperature value, the temperature of the cooling liquid is constant, and the cooling liquid is supplied to the machine tool at a constant temperature. More preferably, in the technical solution of the present embodiment, the machine tool cooling unit further includes a liquid tank 80, and the second water return line 62 and the first water return line 61 merge into the liquid tank 80, and the liquid tank 80 is used for supplying cooling liquid to the machine tool. Mixing the coolant in the second water return line 62 and the first water return line 61 by the tank 80 may result in a more uniform mixing of the coolant, while the tank 80 may also store enough constant temperature coolant for machine tool use. Optionally, as shown in fig. 1, in the technical solution of the present embodiment, the machine tool cooling unit further includes a water pump 90, and the water pump 90 is connected at a junction of the second water return line 62 and the first water return line 61. In the technical solution of the present embodiment, the second water return line 62 and the first water return line 61 may be simultaneously provided with power for circulation of the cooling liquid by the water pump 90.
As an alternative, the cooling liquid in the second water return line 62 and the first water return line 61 may be used, respectively, as desired.
As shown in fig. 1, in the technical solution of the present embodiment, the outlet of the heat recovery refrigerant line 54 is located upstream of the throttling element 30 on the second refrigerant line 52, so that the throttling element 30 can throttle the refrigerant in the second refrigerant line 52, and the refrigerant is fully evaporated in the evaporator 40.
Optionally, a first control valve 541 is provided on the heat recovery refrigerant line 54, and the operation of the heat recovery refrigerant line 54 can be controlled by the first control valve 541. Optionally, a second control valve 621 is provided on the second water return line 62, and the operation of the second water return line 62 may be controlled by the second control valve 621. The machine tool cooling unit can control the first control valve 541 and the second control valve 621 by a controller to implement operation of the heat recovery refrigerant line 54 and the second water return line 62 or to close the heat recovery refrigerant line 54 and the second water return line 62. As a more preferable embodiment, the first control valve 541 and the second control valve 621 may be flow control valves, and by controlling the flow, the load of the machine tool cooling unit or the temperature of the coolant may be adjusted. As another alternative embodiment, the first control valve 541 and the second control valve 621 may be on-off valves, and it is also possible to simply implement on-off control of the heat recovery refrigerant line 54 and the second water return line 62.
In the technical solution of the present embodiment, as shown in fig. 1, the condenser 20 is an air-cooled condenser, and as another alternative embodiment, the condenser 20 may be a condenser with another structure.
Preferably, the compressor 10 is a variable frequency compressor.
The application also provides a control method of the machine tool cooling unit, which is used for controlling the machine tool cooling unit and comprises the following steps: a low load mode of operation wherein when the compressor 10 frequency reaches a first preset frequency value, the heat recovery refrigerant line 54 and the second water return line 62 are operated if the actual temperature of the coolant flowing to the machine tool is below a set temperature below a first preset temperature value; when the compressor 10 frequency reaches a second predetermined frequency value, the heat recovery refrigerant line 54 and the second water return line 62 are shut down, the second predetermined frequency value being greater than the first predetermined frequency value. Optionally, the first preset frequency value is the lowest operating frequency of the compressor 10, that is, when the machine tool cooling unit cannot be operated at a lower load any more, if the liquid level in the first water return line 61 is still lower than the set temperature, the heat recovery refrigerant line 54 and the second water return line 62 are operated to increase the load, so that the machine tool cooling unit can be kept to operate normally, the machine tool cooling unit is prevented from being stopped, and the temperature control precision meets the use requirement of a low load. Alternatively, the first preset temperature value may be 1-2 ℃, i.e., the heat recovery refrigerant line 54 and the second water return line 62 are operated if the liquid temperature of the first water return line 61 flowing to the machine tool is 1-2 ℃ below the set temperature. Alternatively, the second preset frequency value may be 10Hz above the lowest operating frequency, i.e., the heat recovery refrigerant line 54 and the second water return line 62 are shut off when the compressor 10 frequency rises 10Hz above the lowest frequency.
Preferably, the control method includes a waste heat compensation mode in which: when the set temperature of the coolant flowing to the machine tool is above ambient temperature, then the heat recovery refrigerant line 54 and the second water return line 62 are operated; when the set temperature of the coolant flowing to the machine tool is below ambient temperature, the heat recovery refrigerant line 54 and the second water return line 62 are closed. More preferably, the control method includes when the set temperature is higher than the ambient temperature, if the controller determines that the condition for starting the machine tool cooling unit cannot be satisfied, setting the set temperature to a second preset temperature value lower than the ambient temperature, and starting the machine tool cooling unit. Because the set temperature is higher than the ambient temperature, the machine tool cooling unit can not be started through the controller of the machine tool cooling unit, when the controller judges that the condition for starting the machine tool cooling unit can not be met, the set temperature is set to be lower than the second preset temperature value of the ambient temperature, and the heat recovery refrigerant pipeline 54 and the second water return pipeline 62 are operated, so that the cooling liquid finally supplied to the machine tool cooling unit can meet the set temperature. Optionally, the second preset temperature value is 1 ℃, that is, when the set temperature is set to be lower than the ambient temperature by 1 ℃, so as to meet the starting condition of the machine tool cooling unit.
By applying the technical scheme of the application, the condensing waste heat is utilized to heat the cooling liquid in the water return pipeline, so that the load can be increased, the machine tool cooling unit can continuously operate, the temperature of the cooling liquid can be increased under the condition of low ring temperature, and the use requirement of the machine tool can be met.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations can be made to the embodiments of the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. A machine tool cooling unit comprising:
a refrigerant system, the refrigerant system comprising: the compressor comprises a compressor (10), a condenser (20), a throttling element (30) and an evaporator (40), wherein the exhaust end of the compressor (10) is connected with the condenser (20) through a first refrigerant pipeline (51), the condenser (20) is connected with a first refrigerant interface of the evaporator (40) through a second refrigerant pipeline (52), the second refrigerant interface of the evaporator (40) is connected with the air suction end of the compressor (10) through a third refrigerant pipeline (53), and the throttling element (30) is arranged on the second refrigerant pipeline (52);
a cooling system comprising a first water return line (61), the first water return line (61) returning water from a machine tool and exchanging heat through the evaporator (40) and then flowing to the machine tool;
the machine tool cooling unit is characterized by further comprising:
a heat recovery refrigerant line (54), an inlet of the heat recovery refrigerant line (54) being connected to the first refrigerant line (51), an outlet of the heat recovery refrigerant line (54) being connected to the second refrigerant line (52);
a heat recovery device (70) arranged on the heat recovery refrigerant pipeline (54);
a second water return line (62) for returning water from the machine tool, exchanging heat with the refrigerant in the heat recovery refrigerant line (54) through the heat recovery device (70), and then flowing the heat recovery refrigerant line to the machine tool;
the second water return pipeline (62) and the first water return pipeline (61) are converged and then flow to the machine tool;
the control method of the machine tool cooling unit comprises a waste heat compensation mode, wherein in the waste heat compensation mode:
operating the heat recovery refrigerant line (54) and the second water return line (62) when the set temperature of the coolant flowing to the machine tool is above ambient temperature;
when the set temperature of the cooling liquid flowing to the machine tool is lower than the ambient temperature, the heat recovery refrigerant line (54) and the second water return line (62) are closed.
2. The machine tool cooling unit according to claim 1, further comprising a liquid tank (80), the second water return line (62) and the first water return line (61) merging to the liquid tank (80), the liquid tank (80) being for supplying cooling liquid to the machine tool.
3. The machine tool cooling unit according to claim 1, further comprising a water pump (90), the water pump (90) being connected at the junction of the second water return line (62) and the first water return line (61).
4. Machine tool cooling unit according to claim 1, characterized in that the outlet of the heat recovery refrigerant line (54) is located upstream of the throttling element (30) on the second refrigerant line (52).
5. Machine tool cooling unit according to claim 1, characterized in that the heat recovery refrigerant line (54) is provided with a first control valve (541), the first control valve (541) being adapted to control the operation of the heat recovery refrigerant line (54).
6. Machine tool cooling unit according to claim 1, characterized in that a second control valve (621) is provided on the second water return line (62), the second control valve (621) being adapted to control the operation of the second water return line (62).
7. Machine tool cooling unit according to claim 1, characterized in that the condenser (20) is an air-cooled condenser.
8. A control method of a machine tool cooling unit, characterized in that the control method is for controlling the machine tool cooling unit according to any one of claims 1 to 7, the control method further comprising:
a low load operating mode wherein when the compressor (10) frequency reaches a first preset frequency value, the heat recovery refrigerant line (54) and the second water return line (62) are operated if the actual temperature of the coolant flowing to the machine tool is below a set temperature first preset temperature value; when the compressor (10) frequency reaches a second preset frequency value, the heat recovery refrigerant line (54) and the second water return line (62) are closed, the second preset frequency value being greater than the first preset frequency value.
9. The control method of a machine tool cooling unit according to claim 8, characterized by comprising:
when the set temperature is higher than the ambient temperature, if the controller judges that the condition of starting the machine tool cooling unit cannot be met, the set temperature is set to be a second preset temperature value lower than the ambient temperature, and the machine tool cooling unit is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532916.4A CN110243097B (en) | 2019-06-19 | 2019-06-19 | Machine tool cooling unit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910532916.4A CN110243097B (en) | 2019-06-19 | 2019-06-19 | Machine tool cooling unit and control method thereof |
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| CN110243097B true CN110243097B (en) | 2023-08-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111037374A (en) * | 2019-12-31 | 2020-04-21 | 广西玉柴机器股份有限公司 | Overheating prevention method and system for cutting part of high-speed cutter grinding machine tool |
| CN112033182B (en) * | 2020-08-26 | 2021-06-25 | 珠海格力电器股份有限公司 | Shell and tube heat exchanger, unit with heat recovery function and heat recovery control method |
| CN113340014A (en) * | 2021-06-17 | 2021-09-03 | 珠海格力智能装备有限公司 | Cooling system and cooling apparatus |
| CN115042008B (en) * | 2022-06-27 | 2023-12-01 | 南昌沪航工业有限公司 | Closed water storage pressure maintaining temperature control water cooling system of numerical control machine tool |
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| CN107560207A (en) * | 2017-08-15 | 2018-01-09 | 珠海格力电器股份有限公司 | Screw type water chilling unit and control method thereof |
| CN210197765U (en) * | 2019-06-19 | 2020-03-27 | 珠海格力电器股份有限公司 | Machine tool cooling unit |
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