KR101653955B1 - Integrated cooling system for machinery - Google Patents

Abstract

The present invention relates to an integrated cooling system for a mechanical device capable of simultaneously cooling a high-temperature cutting oil and a high-temperature oil discharged from a machine tool, comprising a compressor for compressing a refrigerant, a condenser for dissipating heat of the refrigerant compressed in the compressor, A first heat exchanger for expanding the refrigerant liquefied in the condenser; a first heat exchanger for cooling the high-temperature oil with the low-pressure low-temperature refrigerant expanded in the first electronic expansion valve; a refrigerant inlet pipe connected to the first heat exchanger; First and second temperature sensors respectively installed in the output pipe, third and fourth temperature sensors respectively installed in the first oil input pipe and the first oil output pipe connected to the first heat exchanger, and high temperature high pressure Gas bypass unit that bypasses the coolant of the first heat exchanger to the coolant input end of the first heat exchanger and has a different maximum flow rate.

Description

Integrated cooling system for machinery "

The present invention relates to an integrated cooling system for a machine capable of precisely controlling the temperature of the oil even if the hot-gas flowing into the heat exchanger from the compressor is controlled by the ON-OFF / OFF-control of the hot- ≪ / RTI >

Generally, a machine tool has a high cutting speed and a high rotation speed, so that considerable heat is generated in the rotating part and the spindle of the workpiece. Heat causes thermal deformation of machine tool parts and workpieces, thereby reducing machining accuracy and machine reliability. Conventionally, a cooling system for a machine that circulates a coolant is provided to prevent breakage of the machine tool due to heat generation.

Conventionally, a cooling system for a mechanical device is classified into a cooler for cooling a high temperature oil and a cooler for cooling a high temperature coolant. Since the cooler that cools the high temperature oil must keep the temperature of the oil supplied to the rotating part of the workpiece and the spindle constant, the precise temperature control design by the on / off control method or the hot gas bypass method is required. However, since the precise temperature control by the hot gas bypass method requires the use of an interpolator compressor or a PID control program, there is a problem that the cost increases.

The cooler that cools the high-temperature cutting oil does not require precise temperature control, but it is necessary to separate the cutting chips generated from the machine tool from the cutting oil. For example, as described in Japanese Utility Model Registration No. 3061593, a chip conveyor, a drum filter, a magnet filter, and a complicated circulating pipe are required. These chip conveyors, drum filters and magnet filters are the main reasons for making it difficult to reduce the size of the cooler that cools the hot coolant.

On the other hand, conventionally, a cooler for cooling a high-temperature oil and a cooler for cooling a high-temperature coolant have been separately manufactured. Therefore, in the case of a manufacturing company, there is a problem that the inventories of the compressor and the condenser must be increased for manufacturing because the consumption amount of the compressor and the condenser used in the refrigerant circuit is large. In addition, since the cooler for cooling the oil and the cooler for cooling the cutting oil must be separately purchased, the installation cost, the installation space, and the maintenance cost are increased.

Japan Utility Model Registration No. 3061593 (Registered on June 16, 1999) Japanese Laid-Open Patent Application No. 2001-300834 (published on October 30, 2001)

It is an object of the present invention to provide an integrated cooling system for a machine that can cool both cutting oil and oil.

Another object of the present invention is to provide an integrated cooling system for a mechanical device capable of precisely controlling the temperature of oil even if the hot gas flowing into the heat exchanger from the compressor is controlled to be ON / OFF instead of PID control.

Another object of the present invention is to bypass the oil discharged from the hot oil storage tank to the oil output pipe of the heat exchanger according to the temperature of the oil, Off control of the temperature of the oil to precisely control the temperature of the oil.

It is another object of the present invention to provide an integrated cooling system for a machine in which a filter unit for separating a cutting chip and a cutting oil and a circulation device for circulating the cutting oil are simplified and compactly improved.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and an integrated cooling system for a machine according to an aspect of the present invention is a system for cooling a high-temperature cutting oil discharged from a machine tool and a high- A first electronic expansion valve for expanding the refrigerant liquefied in the condenser; a second electronic expansion valve for expanding the refrigerant in the first electronic expansion valve; A first heat exchanger for cooling the high temperature oil with the low pressure low temperature refrigerant,

A first and a second temperature sensors respectively installed in the refrigerant input pipe and the refrigerant output pipe connected to the first heat exchanger, and a third and a fourth temperature sensors respectively installed in the first oil input pipe and the first oil output pipe connected to the first heat exchanger, 4 temperature sensor, and a plurality of hot-gas bypass units bypassing the high-temperature and high-pressure refrigerant discharged from the compressor to a coolant input end of the first heat exchanger and having different maximum flow rates.

An integrated cooling system for a machine according to a further aspect of the present invention includes a control unit for controlling a flow rate of a plurality of hot-gas bypass units using temperature values sensed from first to fourth temperature sensors. The plurality of hot-gas bypass portions include a single hot-gas inlet pipe through which the high-temperature and high-pressure refrigerant discharged from the compressor flows, and a high-temperature and high-pressure refrigerant introduced through the single hot- Gas discharge piping having a different maximum flow rate to be discharged into the hot-gas discharge piping, and a control unit for controlling the refrigerant flowing through the single hot-gas inflow pipe according to the opening / closing control signal from the control unit, And a multi-path hot-gas bypass valve to guide the hot-gas discharge pipe to the hot-gas discharge pipe.

An integrated cooling system for a mechanical device according to another aspect of the present invention is an integrated cooling system for a mechanical device capable of simultaneously cooling a high temperature cutting oil and a high temperature oil discharged from a machine tool and includes a compressor for compressing a refrigerant, A condenser for dissipating the heat of the refrigerant,

A first heat exchanger for expanding the refrigerant liquefied in the condenser, a first heat exchanger for cooling the high-temperature oil with the low-pressure low-temperature refrigerant expanded in the first electronic expansion valve, a refrigerant inlet pipe connected to the first heat exchanger, Third and fourth temperature sensors respectively installed in the first oil input pipe and the first oil output pipe connected to the first heat exchanger and the first and second temperature sensors respectively installed in the refrigerant output pipe,

A plurality of oil bypass portions bypassing the oil flowing in the first oil input pipe to the first oil output pipe of the first heat exchanger and having different maximum flow rates; And a control unit for controlling the bypass flow rate of the plurality of oil bypass units using the sensed temperature value.

According to a further aspect of the present invention, the plurality of oil bypass portions includes a single second oil inflow pipe through which the high-temperature oil discharged from the high-temperature oil storage tank flows, and a high-temperature second inflow pipe through which the high- A plurality of second oil discharge pipes for discharging the oil of the first oil discharge pipe to the first oil output pipe of the first heat exchanger and having different maximum passing flow rates, And a multi-path oil bypass valve for guiding the oil to at least one of the plurality of second oil discharge pipes to the second oil discharge pipe.

According to a further aspect of the present invention, there is provided an integrated cooling system for a machine, comprising: a coolant tank for generating a vortex caused by high-temperature cutting oil introduced from a machine tool; a cutting chip contained in cutting oil flowing in from the coolant tank; A compressor for compressing the refrigerant, a condenser for dissipating the heat of the refrigerant compressed in the compressor and liquefying the refrigerant,

A first heat exchanger for expanding the refrigerant liquefied in the condenser, a first heat exchanger for cooling the high-temperature oil with the low-pressure low-temperature refrigerant expanded in the first electronic expansion valve, and a second heat exchanger for expanding the refrigerant liquefied in the condenser And a second heat exchanger provided inside the coolant tank for cooling the high-temperature coolant with low-pressure and low-temperature refrigerant expanded in the second electronic expansion valve.

According to a further aspect of the present invention, the second heat exchanger installed inside the coolant tank is characterized in that the tube through which the refrigerant passes is formed in the form of a coil.

An integrated cooling system for a machine according to a further aspect of the present invention further comprises a three-way valve for discharging the refrigerant liquefied in the condenser to the first electronic expansion valve or the second electronic expansion valve. Further, the integrated cooling system for a mechanical device according to the present invention further includes a bag filter for filtering out particles of several mu m or more and several hundreds of mu m or less contained in the cutting oil discharged from the first cyclone filter. The integrated cooling system for a mechanical device according to the present invention further includes a first chip tank for storing cutting chips separated from the first cyclone filter.

An integrated cooling system for a machine according to a further aspect of the present invention further comprises a chip removing part for forming a hole in the center bottom of the coolant tank and for separating the cutting chip from the coolant discharged from the hole. The chip removing unit includes a second cyclone filter and a second chip tank for storing cutting chips separated from the second cyclone filter.

As described above, according to the present invention, the integrated cooling system for a mechanical device has the following effects.

First, by using a single compressor and a condenser to supply a coolant for cooling a high-temperature cutting oil and a high-temperature oil, the manufacturer can reduce the amount of stocks of the compressor and the condenser used in the refrigerant circuit. Consumers do not have to purchase a cooler that cools the oil and a cooler that cools the coolant, reducing installation, installation and maintenance costs.

Second, a plurality of hot-gas bypass units bypassing the coolant (hot-gas) of high temperature and high pressure discharged from the compressor to the coolant input end of the first heat exchanger and having different maximum flow rates, Gas bypass unit by using a temperature value sensed by the sensor, whereby the hot gas flowing into the heat exchanger in the compressor can be turned on / off instead of the PID control by controlling the flow rate of the hot- ), The temperature of the oil can be precisely controlled.

Third, a plurality of oil bypass portions bypassing the oil discharged from the high-temperature oil storage tank to the first oil output pipe of the first heat exchanger and having different maximum flow rates, And the control unit controls the bypass flow rate of the plurality of oil bypass units using the set temperature value. Thus, the hot gas flowing into the heat exchanger in the compressor can be switched on / off OFF), the temperature of the oil can be precisely controlled.

Fourth, a heat exchanger is installed inside a coolant tank for storing high-temperature coolant, and a chip conveyor or a drum filter is not used to separate chips from the coolant flowing into the coolant tank. The overall cooler facility becomes compact and the circulation pipe circulating the coolant can be simplified.

Fifth, the present invention further includes a three-way valve for connecting the first electronic expansion valve and the second electronic expansion valve to one condenser or for discharging the refrigerant liquefied in one condenser to the first electronic expansion valve or the second electronic expansion valve It is possible to selectively use a refrigerant circuit for cooling a high-temperature oil and a refrigerant circuit for cooling a high-temperature cutting oil, if necessary.

 Sixth, the first cyclone filter connected to the coolant tank is further provided with a bag filter at a coolant output end, so that particles of a few μm or more and a few hundreds of μm or less contained in the coolant supplied to the machine tool can be filtered.

Seventhly, the present invention further includes a chip removing part for forming a hole in the bottom of the center of the coolant tank and for separating a cutting chip from the cutting oil discharged from the hole, so that the cutting chip is not accumulated on the bottom of the coolant tank Also, the coolant can be cleaned and used again.

Eighth, in the second heat exchanger installed in the coolant tank, the tube through which the coolant passes is formed in the form of a coil, so that the contact area between the high-temperature coolant flowing into the coolant tank and the coolant is widened and heat exchange is performed well.

1 shows a first embodiment of an integrated cooling system for a mechanical device according to the present invention,
2 shows a second embodiment of an integrated cooling system for a machine according to the present invention,
3 is a third embodiment showing an integrated cooling system for a machine according to the present invention.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

1 to 3, the integrated cooling system 100 for a mechanical device according to the present invention is implemented by including a coolant circulation device 110, a refrigerant circulation device 120, and an oil circulation device 130 .

The coolant circulation apparatus 110 includes a coolant tank 111 for generating a vortex caused by high temperature cutting oil flowing from the machine tool 1 and a coolant tank 111 for circulating coolant stored in the coolant tank 111 to the machine tool 1 And a first cyclone filter 113 for separating cutting chips contained in the cutting oil flowing from the coolant tank 111 and supplying the cleaned cutting oil to the machine tool 1. [

The coolant tank 111 is embodied as a conical cylinder with a sharp bottom. This is for the purpose of allowing the vortex to be formed better when the high-temperature cutting oil flowing into the coolant tank 111 from the machine tool 1 is injected through the injection port 2. Further, it is realized as a conical cylinder having a bottom, so that a cutting chip separated from the cutting oil by vortex collects at the center of the pointed bottom.

The first cyclone filter 113 is a device for separating a cutting chip from a cutting oil by screwing down the cutting oil containing a cutting chip downward. As the cutting oil containing the cutting chip is screw-rotated in the first cyclone filter 113, the cutting chip moves toward the wall of the peripheral portion and then precipitates to the floor, and the cutting chip is separated The resulting coolant is discharged through the outlet.

1, the integrated cooling system 100 for a mechanical device according to the present invention includes a first chip tank 114 for storing a chip, which is separated from the first cyclone filter 113, Can be implemented. The coolant tank 111 and the coolant tank circulation apparatus 110 including the pump 112, the first cyclone filter 113 and the first chip tank 114 are installed in a conventional coolant tank with a chip conveyor, It is possible to greatly reduce the size of the coolant circulating apparatus including the filter.

1, the integrated cooling system 100 for a mechanical device according to the present invention includes a coolant tank 111 and a coolant tank 111. The coolant tank 111 includes a coolant tank 111, (115). ≪ / RTI > The chip removing unit 115 may be implemented by including a second chip tank 115b for storing a chip separated from the second cyclone filter 115a and the second cyclone filter 115a . The second chip tank 115b and the first chip tank 114 may be separately manufactured and installed, or may be implemented as one.

As shown in FIG. 2, the integrated cooling system 100 for a mechanical device according to the present invention includes a bag filter (not shown) for filtering particles of several micrometers or more and several hundreds of micrometers or less contained in the cutting oil discharged from the first cyclone filter 113, (116). The bag filter 116 may optionally be additionally mounted according to the buyer's choice.

1, the integrated cooling system 100 for a machine according to the present invention includes a heat exchanger 117 installed inside a coolant tank 111 for cooling a high-temperature coolant with low-pressure and low- . The heat exchanger 117 is preferably configured to increase the contact area between the coolant flowing into the coolant tank 110 and the coolant, thereby facilitating heat exchange. For example, the heat exchanger 117 may be formed in the form of a coil through which the refrigerant passes.

1, the refrigerant circulation apparatus 120 includes a compressor 121 for compressing a refrigerant, a condenser 122 for dissolving and liquefying the heat of the refrigerant compressed in the compressor 120, A plurality of electronic expansion valves 123 and 124 connected to the condenser 122 and a heat exchanger 125 for cooling the high temperature oil with a low pressure low temperature refrigerant and a high temperature and high pressure refrigerant discharged from the compressor 121 Hot-gas) to the coolant input end of the heat exchanger 125. The hot-

The plurality of hot-gas bypass portions 126 may be implemented as a plurality of hot-gas discharge pipes having different maximum flow rates and on / off valves for opening and closing respective hot-gas discharge pipes. In this case, the hot-gas discharge piping may increase, and the hot-gas discharge piping installation cost may increase.

As shown in FIG. 1, the plurality of hot-gas bypassing units 126 includes a single hot-gas inflow pipe 126a (hot-gas inflow pipe) through which a high-temperature and high- A plurality of hot-gas discharge pipes H1 to H3 for discharging a high-temperature and high-pressure refrigerant (hot-gas) flowing through a single hot-gas inflow pipe 126a to an input end of the heat exchanger 125; , And a multipath hot-gas bypass valve 126b.

The plurality of hot-gas discharge pipes (H1 to H3) may be implemented to have the same maximum flow rate or be different from each other. Gas discharge pipes H1 to H8 to precisely control the temperature of the oil even if the hot gas flowing into the heat exchanger 125 from the compressor 121 is controlled to be ON / H3 are preferably implemented with different maximum flow rates.

The multi-path hot-gas bypass valve 126b connects the refrigerant flowing through the single hot-gas inlet pipe 126a to the plurality of hot-gas discharge pipes H1 to H8, according to the opening / closing control signal from the controller 140, H3) into at least one hot-gas discharge pipe. For example, the multi-path hot-gas bypass valve 126b may open hot-gas discharge pipes corresponding to H1 and H2 among a plurality of hot-gas discharge pipes H1 to H3, The corresponding hot-gas discharge pipe may be opened.

1, the refrigerant input pipe 127 and the refrigerant output pipe 128 connected to the heat exchanger 125 are respectively connected to the first and second temperature sensors T1 and T2 and the heat exchanger 125 The third and fourth temperature sensors T3 and T4 are installed in the connected oil input pipe 136 and the oil output pipe 137, respectively. The control unit 140 controls the flow of the refrigerant from the compressor 121 to the heat exchanger 125 using the temperature values sensed by the first and second temperature sensors T1 and T2 and the third and fourth temperature sensors T3 and T4 Gas bypass unit 126 is controlled to be ON / OFF in place of the PID control.

As shown in FIG. 2, a three-way valve 129 may be provided between the condenser 121 and the electronic expansion valves 123 and 124 to selectively discharge the refrigerant condensed in the condenser 121. Accordingly, the user can selectively use a refrigerant circuit for cooling the high temperature oil and a refrigerant circuit for cooling the high temperature cutting oil, if necessary.

1 to 3, the oil circulating apparatus 130 includes a pump 131 for circulating the oil discharged from the heat exchanger 125, a path switching valve 132, and a high-temperature oil storage tank 133 . The path switching valve 132 guides the oil flowing in the oil output pipe 137 connected to the heat exchanger 125 to either the machine tool 5 or the oil input pipe 136 or the high temperature oil storage tank 133 .

The control unit 140 controls the operation of the path switching valve 132 using the temperature values sensed by the first and second temperature sensors T1 and T2 and the third and fourth temperature sensors T3 and T4 And outputs a path switching control signal. The control unit 140 controls the operation of the path switching valve 132 by using the pressure value of the oil detected by the pressure sensor P1 installed in the oil input pipe 136 connected to the heat exchanger 125, It is possible to output the switching control signal.

3, the oil circulating apparatus 130 includes a plurality of oil bypass portions 132 for bypassing the oil discharged from the high-temperature oil storage tank 133 to the oil output pipe 137 of the heat exchanger 125, (134).

The plurality of oil bypass portions 134 may be implemented as a plurality of oil discharge pipes having different maximum passing flow rates and on / off valves for opening and closing the respective oil discharge pipes. In this case, the oil discharge pipe may increase, and the oil discharge pipe installation cost may increase.

As another example, the plurality of oil bypass portions 134 may include a single oil inflow pipe 134a through which the oil discharged from the high-temperature oil storage tank 133 flows, a single oil inflow pipe 134a A plurality of oil discharge pipes S1 to S3 and a multipass oil bypass valve 134b for discharging the oil introduced through the oil passages 134a to the oil output pipe 137 connected to the heat exchanger 125 .

The plurality of oil discharge pipes S1 to S3 may be realized to have the same maximum flow rate and be implemented differently from each other. A plurality of oil discharge pipes S1 to S3 are connected to the high-temperature oil storage tank 133 in order to precisely control the temperature of the oil even when the bypass flow rate of the oil discharged from the high- temperature oil storage tank 133 is controlled to be ON / It is preferable that the maximum passing flow amount be implemented differently.

The multi-path oil bypass valve 134b controls the refrigerant flowing through the single oil inflow pipe 134a to flow through at least one of the plurality of oil discharge pipes S1 to S3 in accordance with the open / close control signal from the control unit 140 Guide to the oil discharge pipe. For example, the multi-path oil bypass valve 134b may open hot-gas discharge pipes corresponding to S1 and S2 among the plurality of oil discharge pipes S1 to S3, and may discharge oil corresponding to S2 and S3 The pipe may be opened.

3, the refrigerant input pipe 127 and the refrigerant output pipe 128 connected to the heat exchanger 125 are respectively connected to the first and second temperature sensors T1 and T2 and the heat exchanger 125 The third and fourth temperature sensors T3 and T4 are installed in the connected oil input pipe 136 and the oil output pipe 137, respectively. The control unit 140 controls the flow of the refrigerant from the compressor 121 to the heat exchanger 125 using the temperature values sensed by the first and second temperature sensors T1 and T2 and the third and fourth temperature sensors T3 and T4 (ON) / OFF (OFF) control of the oil passage flow rate of a plurality of oil bypass portions 134 instead of ON / OFF control of the hot gas flowing in the oil passages 134.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined only by the appended claims.

1, 5: Machine tools
2: nozzle
100: Integrated cooling system for machinery
110: Coolant circulation device
111: Coolant tank 112: Pump
113: first cyclone filter 114: first chip tank
115: chip removal
115a: second cyclone filter 115b: second chip tank
115c: pump
116: bag filter 117: heat exchanger
120: Refrigerant circulation device
121: compressor 122: condenser
123, 124: Electronic expansion valve
125: heat exchanger
126: Hot-gas bypass section
126a: hot-gas inflow pipe
126b: Multipass hot-gas bypass valve
127: Refrigerant input piping 128: Refrigerant output piping
129: Three-way valve
130: Oil circulation device
131: Pump 132: Path switching valve
133: High temperature oil storage tank
134: oil bypass portion
134a: Oil inflow pipe
134b: Multipass oil bypass valve
136: Oil input piping 137: Oil output piping
140:

Claims (21)

An integrated cooling system for a mechanical device capable of simultaneously cooling high temperature cutting oil and high temperature oil discharged from a machine tool,
A compressor for compressing the refrigerant;
A condenser for dissipating the heat of the refrigerant compressed by the compressor to heat the refrigerant;
A first electronic expansion valve for expanding the refrigerant liquefied in the condenser;
A first heat exchanger for cooling the high-temperature oil with low-pressure and low-temperature refrigerant expanded in the first electronic expansion valve;
A first and a second temperature sensors respectively installed in a refrigerant input pipe and a refrigerant output pipe connected to the first heat exchanger and a third and fourth temperature sensors respectively installed in a first oil input pipe and a first oil output pipe connected to the first heat exchanger, A fourth temperature sensor; And
A plurality of hot-gas bypass units bypassing the high-temperature and high-pressure refrigerant discharged from the compressor to a coolant input end of the first heat exchanger and having different maximum flow rates;
An integrated cooling system for a machine. The integrated cooling system for a machine according to claim 1,
A control unit for controlling flow rates of the plurality of hot-gas bypass units using the temperature values sensed by the first to fourth temperature sensors;
An integrated cooling system for a machine. 3. The apparatus of claim 2, wherein the plurality of hot-
A single hot-gas inflow pipe through which the high-temperature and high-pressure refrigerant discharged from the compressor flows;
A plurality of hot-gas discharge pipes having different maximum flow rates for discharging the high-temperature and high-pressure refrigerant flowing through the single hot-gas inflow pipe to the input end of the first heat exchanger; And
And a multi-path hot-gas bypass valve for guiding refrigerant flowing through a single hot-gas inlet pipe to at least one of the plurality of hot-gas discharge pipes according to an opening / closing control signal from the control unit valve;
And an integrated cooling system for a machine. The integrated cooling system for a machine according to claim 1,
A coolant tank for generating vortex caused by high-temperature cutting oil flowing from a machine tool;
A first cyclone filter for separating cutting chips contained in cutting oil flowing from the coolant tank and supplying cleaned cutting oil to the machine tool;
A second electronic expansion valve for expanding the refrigerant liquefied in the condenser;
A second heat exchanger installed inside the coolant tank for cooling the high-temperature coolant with low-pressure and low-temperature refrigerant expanded in the second electronic expansion valve;
And an integrated cooling system for a machine. 5. The integrated cooling system for a machine according to claim 4,
A three-way valve for discharging the refrigerant liquefied in the condenser to the first electronic expansion valve or the second electronic expansion valve;
And an integrated cooling system for a machine. 5. The integrated cooling system for a machine according to claim 4,
A bag filter for filtering particles contained in the cutting oil discharged from the first cyclone filter;
And an integrated cooling system for a machine. 5. The integrated cooling system for a machine according to claim 4,
A first chip tank for storing cutting chips separated from the first cyclone filter;
And an integrated cooling system for a machine. 5. The integrated cooling system for a machine according to claim 4,
A chip removing unit that forms a hole in the bottom of the center of the coolant tank and separates a cutting chip from the cutting oil discharged from the hole;
And an integrated cooling system for a machine. 9. The apparatus of claim 8,
A second cyclone filter; And
A second chip tank for storing cutting chips separated from the second cyclone filter;
And an integrated cooling system for a machine. The method of claim 4,
The second heat exchanger may include a tube having a coil through which the refrigerant passes,
And an integrated cooling system for a machine. The method of claim 2,
A path switching valve for guiding the oil flowing through the first oil output pipe connected to the first heat exchanger to one of the machine tool, the first oil input pipe, and the high temperature oil storage tank in accordance with the path switching control signal input from the control unit, ;
And an integrated cooling system for a machine. An integrated cooling system for a mechanical device capable of simultaneously cooling high temperature cutting oil and high temperature oil discharged from a machine tool,
A compressor for compressing the refrigerant;
A condenser for dissipating the heat of the refrigerant compressed by the compressor to heat the refrigerant;
A first electronic expansion valve for expanding the refrigerant liquefied in the condenser;
A first heat exchanger for cooling the high-temperature oil with low-pressure and low-temperature refrigerant expanded in the first electronic expansion valve;
A first and a second temperature sensors respectively installed in a refrigerant input pipe and a refrigerant output pipe connected to the first heat exchanger and a third and fourth temperature sensors respectively installed in a first oil input pipe and a first oil output pipe connected to the first heat exchanger, A fourth temperature sensor;
A plurality of oil bypass portions bypassing the oil flowing in the first oil input pipe to the first oil output pipe of the first heat exchanger and having different maximum flow rates; And
A control unit for controlling bypass flow rates of the plurality of oil bypass units by using temperature values sensed by the first to fourth temperature sensors;
An integrated cooling system for a machine. 14. The apparatus of claim 12, wherein the plurality of oil bypass portions comprise:
A single second oil inflow pipe through which a high temperature oil discharged from the high temperature oil storage tank flows;
A plurality of second oil discharge pipes discharging hot oil flowing through the single second oil inflow pipe to a first oil output pipe of the first heat exchanger and having different maximum flow rates; And
And a multi-path oil bypass valve for guiding the oil flowing through the single second oil inflow pipe to at least one of the plurality of second oil discharge pipes according to an opening / closing control signal from the control unit ;
And an integrated cooling system for a machine. 14. The integrated cooling system for a machine according to claim 12,
A path switching valve for guiding the oil flowing through the first oil output pipe connected to the first heat exchanger to one of the machine tool, the first oil input pipe, and the high temperature oil storage tank in accordance with the path switching control signal input from the control unit, ;
And an integrated cooling system for a machine. 14. The integrated cooling system for a machine according to claim 12,
A coolant tank for generating vortex caused by high-temperature cutting oil flowing from a machine tool;
A first cyclone filter for separating cutting chips contained in cutting oil flowing from the coolant tank and supplying cleaned cutting oil to the machine tool;
A second electronic expansion valve for expanding the refrigerant liquefied in the condenser;
A second heat exchanger installed inside the coolant tank for cooling the high-temperature coolant with low-pressure and low-temperature refrigerant expanded in the second electronic expansion valve;
And an integrated cooling system for a machine. 16. The integrated cooling system for a machine according to claim 15,
A three-way valve for discharging the refrigerant liquefied in the condenser to the first electronic expansion valve or the second electronic expansion valve;
And an integrated cooling system for a machine. 16. The integrated cooling system for a machine according to claim 15,
A bag filter for filtering the particles contained in the coolant discharged from the first cyclone filter;
And an integrated cooling system for a machine. 16. The integrated cooling system for a machine according to claim 15,
A first chip tank for storing cutting chips separated from the first cyclone filter;
And an integrated cooling system for a machine. 16. The integrated cooling system for a machine according to claim 15,
A chip removing unit that forms a hole in the bottom of the center of the coolant tank and separates a cutting chip from the cutting oil discharged from the hole;
And an integrated cooling system for a machine. 20. The apparatus of claim 19,
A second cyclone filter; And
A second chip tank for storing cutting chips separated from the second cyclone filter;
And an integrated cooling system for a machine. 16. The method of claim 15,
The second heat exchanger may include a tube having a coil through which the refrigerant passes,
And an integrated cooling system for a machine.

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