CN110375452A - Low-temperature cold wind refrigeration system and its control method, micro lubricating cooling system - Google Patents
Low-temperature cold wind refrigeration system and its control method, micro lubricating cooling system Download PDFInfo
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- CN110375452A CN110375452A CN201910462019.0A CN201910462019A CN110375452A CN 110375452 A CN110375452 A CN 110375452A CN 201910462019 A CN201910462019 A CN 201910462019A CN 110375452 A CN110375452 A CN 110375452A
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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
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- 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
- F25B41/40—Fluid line arrangements
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- 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
Abstract
The invention discloses a kind of low-temperature cold wind refrigeration system and its control methods, micro lubricating cooling system, low-temperature cold wind refrigeration system includes the first refrigeration pipeline, second refrigeration pipeline and gas transfer pipeline, the flow direction of air shooter curb compressed gas successively with the first evaporator of the first refrigeration pipeline, second evaporator of the second refrigeration pipeline connects, so that carrying out heat exchange between compressed gas and refrigerant, gas transfer pipeline convey compressed gas successively successively with the first refrigeration pipeline, second refrigeration pipeline carries out heat exchange, compressed gas successively passes through heat release twice, so that temperature can be effectively reduced, the minimum low-temperature cold wind for forming -60 DEG C.Moreover, heat exchanges twice, when not reducing compressed gas flow velocity, compressed gas is enabled to sufficiently to exchange heat with refrigerant.
Description
Technical field
The present invention relates to cooling system technical field, in particular to a kind of low-temperature cold wind refrigeration system and its control method,
Micro lubricating cooling system.
Background technique
In process of metal working, since cutting friction can generate amount of heat between cutter and workpiece, workpiece will affect
Machining accuracy shortens cutter life.Cutting technology is lubricated using sub-cooled, has been found strong to solve high hard high-strength material
Strong cutting heat shock and vibration and plastic material cutting are also easy to produce the effective scheme that machined burrs etc. are difficult to characteristic.
The currently used low temperature process type of cooling includes carbon dioxide sub-cooled, liquid nitrogen is cooling and air cooling is processed.
But carbon dioxide sub-cooled and the cooling processing cost of liquid nitrogen are higher, and not yet realize and promote the use of a large area.In existing skill
In art, in air cooling metal machining process, mainly by air-cooler provide cold wind, existing air-cooler substantially all have compared with
For complicated structure, and use process is also complex, and the temperature of cold wind is minimum can only to drop to -30 DEG C, can not be suitable for high speed
It is used with high-precision numerically-controlled machine tool.
Patent document CN 102003823A discloses a kind of low-temperature cold wind Two-stage refrigerating system and its cold air jet machine, though
Two-stage refrigeration structure is so used, the gas temperature of cold air jet outlet is can be effectively reduced, reaches lower temperature, such as -60 DEG C,
But complicated integral structure, cold wind air outlet temperature poor controllability；Moreover, cold wind air output is limited, it is difficult to guarantee that cold wind goes out
Cold wind air output is improved while air temperature.
Summary of the invention
It is an object of the invention at least solve one of the technical problems existing in the prior art, a kind of low-temperature cold wind is provided
Refrigeration system and its control method, can it is accurate, stablize, rapidly adjust control cold wind temperature, and provide a kind of micro lubricating
Cooling system can be preferably suitable for high-precision by forming low-temperature cold wind micro lubricating mist of oil in conjunction with micro lubricating oil liquid
The processing of degree and high-strength material.
According to the first aspect of the invention, a kind of low-temperature cold wind refrigeration system is provided, comprising: the first refrigeration pipeline, including
It is sequentially connected the first compressor, the first condenser, the first capillary group and the first evaporator for constituting refrigerant circulation circuit；Second
Refrigeration pipeline constitutes the second compressor of refrigerant circulation circuit, the second condenser, the second capillary group and the including being sequentially connected
Two evaporators；And gas transfer pipeline, for conveying compressed gas, the flowing side of the air shooter curb compressed gas
To successively being connect with first evaporator, second evaporator, so that carrying out heat exchange between compressed gas and refrigerant.
Above-mentioned low-temperature cold wind refrigeration system at least has the advantages that gas transfer pipeline conveying compressed gas is successive
It successively carries out heat with the first refrigeration pipeline, the second refrigeration pipeline to exchange, compressed gas successively passes through heat release twice, so that temperature
It can be effectively reduced, the minimum low-temperature cold wind for forming -60 DEG C.Moreover, heat exchanges twice, compressed gas flow velocity is not being reduced
In the case of, enable to compressed gas sufficiently to exchange heat with refrigerant.
The low-temperature cold wind refrigeration system according to a first aspect of the present invention, the gas transfer pipeline include successively with institute
It states the first evaporator, the gas refrigeration pipeline that second evaporator connects and is arranged in parallel gas with the gas refrigeration pipeline
Bypass line；Further include control the gas refrigeration pipeline, the gas bypass pipeline on off operating mode controller.
The low-temperature cold wind refrigeration system according to a first aspect of the present invention, the gas transfer pipeline further include that setting exists
Air inlet port and air outlet before and after the gas refrigeration pipeline, gas bypass pipeline, the setting point on the air inlet port
Not with the solenoid valve of the gas refrigeration pipeline, the gas bypass piping connection, temperature is set in the air outlet and is passed
Sensor, the temperature that the controller is detected according to the temperature sensor control the solenoid valve to control the gas refrigeration pipe
Road, gas bypass pipeline connection state.
The low-temperature cold wind refrigeration system according to a first aspect of the present invention, further includes so that in first refrigeration pipeline
Refrigerant and second refrigeration pipeline in refrigerant carry out the heat exchanger of heat exchange, the heat exchanger is in first capillary
Between first evaporator described in Guan Zuyu, the heat exchanger is between second condenser and the second capillary group.
The low-temperature cold wind refrigeration system according to a first aspect of the present invention, first compressor and/or the second compression
Machine is frequency-changeable compressor.
The low-temperature cold wind refrigeration system according to a first aspect of the present invention, further includes automatic protective system, described automatic
Protection system includes: the first compressor current collector, for acquiring the driving current signal of first compressor；Second pressure
Contracting machine current collector, for acquiring the driving current signal of second compressor；First compressor air-discharging outlet temperature passes
Sensor, the refrigerant delivery temperature for first compressor；Second compressor air-discharging outlet temperature sensor, for described the
The refrigerant delivery temperature of two compressors；First compressor air-discharging outlet pressure sensor, the refrigerant for first compressor
Pressure at expulsion；Second compressor air-discharging outlet pressure sensor, the refrigerant pressure at expulsion for second compressor；PLC control
Device processed, for receiving the first compressor current collector, the second compressor current collector, the first compressor air-discharging outlet temperature
Sensor, the second compressor air-discharging outlet temperature sensor, the first compressor air-discharging outlet pressure sensor and the second compressor
The signal of air exit pressure sensor, according to the working condition for receiving the first compressor of signal control, the second compressor.
According to the second aspect of the invention, a kind of low-temperature cold wind micro lubricating cooling system is provided, including according to the present invention
Low-temperature cold wind refrigeration system, lubricant medium transfer pipeline described in first aspect and atomising device, the gas transfer pipeline, institute
Lubricant medium transfer pipeline is stated to connect with the atomising device respectively.
Above-mentioned low-temperature cold wind micro lubricating cooling system at least has the advantages that compressed air passes through heat release twice
It forms low-temperature cold wind and is transported to atomising device, meanwhile, lubricant medium transfer pipeline conveying micro lubricating oil liquid to atomising device,
Low temperature cold air and micro lubricating oil liquid are sufficiently mixed and are formed low temperature mist of oil, fill-before-fire to machining area in atomising device.
According to the third aspect of the invention we, a kind of control method of low-temperature cold wind refrigeration system is provided, comprising the following steps:
The temperature of low-temperature cold wind in gas transfer pipeline described in real-time detection judges the temperature and preset threshold of low-temperature cold wind
Size；
If temperature >=preset threshold of low-temperature cold wind, controls the gas refrigeration pipeline and be in connected state and the gas
Bypass line is in an off state；
If the temperature < preset threshold of low-temperature cold wind, controls the gas refrigeration pipeline and be in an off state and the gas
Bypass line is in connected state.
The control method of the low-temperature cold wind refrigeration system according to a third aspect of the present invention, the preset threshold are -20
DEG C to any setting numerical value between -60 DEG C.
Detailed description of the invention
The present invention is further explained with reference to the accompanying drawings and examples；
Fig. 1 is the systematic schematic diagram of the embodiment of the present invention.
Specific embodiment
This part will be described in specific embodiments of the present invention, and the preferred embodiments of the invention is shown in the accompanying drawings, attached
The effect of figure be with figure remark additionally book word segment description, enable a person to intuitively, visually understand of the invention
Each technical characteristic and overall technical architecture, but it should not be understood as limiting the scope of the invention.
In the description of the present invention, it is to be understood that, be related to orientation description, for example, above and below, front, rear, left and right etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.
In the description of the present invention, several to be meant that one or more, it is multiple to be meant that two or more, be greater than,
Be less than, more than etc. be interpreted as not including this number, it is above, following, within etc. be interpreted as including this number.If there is being described to first,
Second is only intended to for the purpose of distinguishing technical characteristic, is not understood to indicate or imply relative importance or implicitly indicates institute
The quantity of the technical characteristic of instruction or the precedence relationship for implicitly indicating indicated technical characteristic.
In description of the invention, unless otherwise restricted clearly, the words such as setting, installation, connection be shall be understood in a broad sense, institute
Above-mentioned word in the present invention specific can rationally be determined with the particular content of combination technology scheme by belonging to technical field technical staff
Meaning.
Referring to Fig.1, it includes the first refrigeration pipeline 10, second system that the embodiment of the present invention, which provides a kind of low-temperature cold wind refrigeration system,
Cold pipeline 20 and gas transfer pipeline 30, the cold wind of DRY CUTTING is capable of forming by the system, and cold wind temperature is minimum reachable
To -60 DEG C, it is effectively reduced the temperature of cutting zone.
Wherein, the first refrigeration pipeline 10 is cold including the first compressor 11, first for being sequentially connected composition refrigerant circulation circuit
Condenser 12, the first capillary group 13 and the first evaporator 14, the gaseous coolant of low-temp low-pressure by after the compression of the first compressor 11 at
For the gaseous coolant of high temperature and pressure, become medium temperature high-pressure liquid refrigerant after the condensation of the first condenser 12, by the first capillary
The throttling of pipe group 13 becomes low-temp low-pressure liquid refrigerants, becomes low-temp low-pressure gaseous coolant using the evaporation of the first evaporator 14, then
The first compressor 11 is returned to, level-one refrigeration cycle is formed.
Similarly, the second refrigeration pipeline 20 includes being sequentially connected the second compressor 21, second for constituting refrigerant circulation circuit
Condenser 22, the second capillary group 23 and the second evaporator 24, after the gaseous coolant of low-temp low-pressure is by the compression of the second compressor 21
As the gaseous coolant of high temperature and pressure, become medium temperature high-pressure liquid refrigerant after the condensation of the second condenser 22, by second mao
The throttling of tubule group 23 becomes low-temp low-pressure liquid refrigerants, becomes low-temp low-pressure gaseous coolant using the evaporation of the second evaporator 24,
The second compressor 21 is returned, second level refrigeration cycle is formed.
Optionally, the first compressor 11 and the second compressor 21 are invariable frequency compressor, and the first condenser 12 and second is cold
Condenser 22 is all made of air cooling way, using copper pipe fin type heat exchanger, can be integrally formed structure, keep system structure simple
Change, first blower and the second blower are set above the first condenser 12 and the second condenser 22, using external rotor axial-flow fan,
It is easy for installation, it is compact-sized；First evaporator 14 and the second evaporator 24 also use copper pipe fin type structure heat exchanger, can do
At an overall structure, simplify system structure.
First refrigeration pipeline 10, the second refrigeration pipeline 20 constitute mutually independent refrigerant circulation circuit, gas transfer pipeline 30
Conveying compressed gas successively successively carries out heat with the first refrigeration pipeline 10, the second refrigeration pipeline 20 and exchanges, and compressed gas is successive
By heat release twice, so that temperature can be effectively reduced, the minimum low-temperature cold wind for forming -60 DEG C.Moreover, heat is handed over twice
It changes, when not reducing compressed gas flow velocity, compressed gas is enabled to sufficiently to exchange heat with refrigerant.
In the present embodiment, gas transfer pipeline 30 includes the gas refrigeration pipeline 31 and gas bypass line being arranged in parallel
32, gas refrigeration pipeline 31 is in normally open, and compressed gas flows through gas refrigeration pipeline 31 and carries out refrigeration reduction temperature, gas
Bypass line 32 is in normally off, and the cold wind temperature finally exported for adjusting compressed gas passes through gas refrigeration pipeline 31
With the setting of gas bypass line 32 so that cold wind temperature be able to carry out it is automatic, be accurately controlled adjustment, specifically, gas system
Cold pipeline 31 is successively successively connect with the first evaporator 14, the second evaporator 24, gas refrigeration pipeline 31 and gas bypass line
32 front and back both ends, i.e. the upstream downstream of compressed gas flow have air inlet port and air outlet, are arranged on air inlet port
The solenoid valve 33 being connect respectively with gas refrigeration pipeline 31, gas bypass pipeline 32, by controlling the working condition of solenoid valve 33,
Make to the property of can choose air inlet port be connected with gas refrigeration pipeline 31, or be connected with gas bypass pipeline 32, that is, controls
The on off operating mode of gas refrigeration pipeline 31 or gas bypass pipeline 32, compressed gas are exported finally by air outlet.
On air inlet port and air outlet be arranged temperature sensor 34,34 real-time monitoring compressed gas of temperature sensor into
The temperature of gas port and air outlet, and by signal feedback transmission to controller, controller is according to preparatory setting and then controls
The working condition of solenoid valve 33, as the temperature value of air outlet can be set as working as air outlet between -20 DEG C to -60 DEG C
Temperature be higher than setting numerical value when, controller control electromagnetism valve events so that gas refrigeration pipeline 31 is in connected state and gas
Body bypass line 32 is in an off state, and compressed gas all carries out refrigeration output, and then reduces the cold wind temperature at air outlet
Degree；When the temperature of air outlet is lower than setting numerical value, controller controls electromagnetism valve events, so that gas bypass pipeline 32 is in
Connected state and gas refrigeration pipeline 31 is in an off state, compressed gas is by temperature at gas bypass pipeline 32 and air outlet
It spends low gas to be neutralized, so that the temperature at air outlet rises, when again the temperature of air outlet is higher than setting numerical value
When, again control solenoid valve 33 act, so according to air outlet temperature detection switch over control gas refrigeration pipeline 31 or
The on off operating mode of person's gas bypass pipeline 32, so that presetting in numberical range of being in always of the temperature of air outlet, into
And realize that automatic, fast and accurately temperature controls.
In wherein some embodiments, the first compressor 11 and/or the second compressor 21 are chosen as frequency-changeable compressor, i.e., and
One refrigeration pipeline 10 and/or the second refrigeration pipeline 20 can be set as frequency conversion refrigerant circulation and freeze back according to actual selection needs
Road, and then the cooling capacity output of the first evaporator 14 and/or the second evaporator 23 is controlled, to more quickly and accurately control gas
Compressed gas and refrigerant heat exchange degree in body refrigeration pipeline 31, so that compressed gas cryogenic temperature modification scope is wider.
The embodiment of the present invention also provides a kind of low-temperature cold wind micro lubricating cooling system, can be by low-temperature cold wind and micro profit
Lubricating oil liquid is thoroughly mixed to form low temperature mist of oil, fill-before-fire to machining area, specifically, low-temperature cold wind micro lubricating cooling system packet
Include above-mentioned low-temperature cold wind refrigeration system, lubricant medium transfer pipeline 40 and atomising device 50.In low-temperature cold wind refrigeration system
The compressed gas of gas transfer pipeline 30 filters out moisture, impurity particle in air by air filter 35, by drying
Machine 36 makes the reduction of compressed air pressure dew point, and compressed air pressure dew point should be lower than -60 DEG C in the present embodiment, avoids exporting low
Warm cold air has condensed water generation in inner wall of the pipe, and thoroughly the compressed air after drying is using pressure regulator valve 37, through gas refrigeration
Pipeline 31 is successively carried out continuously heat exchange with the first evaporator 14, the second evaporator 24, and compressed air passes through heat release twice, temperature
It is effectively reduced, the minimum low-temperature cold wind for forming -60 DEG C is simultaneously transported to atomising device 50.Lubricant medium transfer pipeline 40 includes oil
Tank 41, control valve 42, oil pump 43, control valve 42 and PLC controller communication connection, by beating for PLC controller control control valve 42
On or off is closed, and then controls the output on off operating mode of lubricant passage way, and lubricating oil is delivered in atomising device 50 by oil pump 43,
Low temperature cold air and micro lubricating oil liquid are sufficiently mixed and are formed low temperature mist of oil in atomising device, then are sprayed by nozzle to adding
Work area domain.
In the present embodiment, heat exchanger 60 is also set up between the first refrigeration pipeline 10 and the second refrigeration pipeline 20, is exchanged heat
Device 60 makes the refrigerant in refrigerant and the second refrigeration pipeline in the first refrigeration pipeline carry out heat exchange, and then makes full use of the energy
Efficiency, specifically, heat exchanger 60 are connected between the first capillary group 13 and the first evaporator 14 in the first refrigeration pipeline 10,
And be connected between the second condenser 22 and the second capillary group 23 in the second refrigeration pipeline 20, heat exchanger 60 is in the first refrigeration
Play the role of sweat cooling in the refrigerant circulation circuit of pipeline 10, is played in the refrigerant circulation circuit of the second refrigeration pipeline 20 cold
Exothermic effects are coagulated, refrigerant evaporation takes away the heat that refrigerant condensation is released in the second refrigeration pipeline 20, pole in the first refrigeration pipeline 10
Big improves the cooling system amount of the second refrigeration pipeline 20, while improving the integrally cooling efficiency of system, required for acquisition
Low temperature.Heat exchanger 60 is chosen as plate heat exchanger structure, and heat exchange area is big, and heat exchange efficiency is high.
In wherein some embodiments, low-temperature cold wind refrigeration system further includes automatic protective system, PLC controller, man-machine
Interactive interface terminal and alarm, PLC controller, for being triggered according to the oil mass of the temperature of detection, the pressure of detection and detection
Signal is controlled, to realize automation control.Human-machine Control interface terminal passes through control number needed for touch screen input for user
The data of user's input, warning message, detection are shown according to (such as temperature, pressure), and according to the control signal of PLC controller
Pressure, temperature of detection etc..Human-computer interaction interface terminal and PLC controller communication connection, human-computer interaction interface terminal are adopted
It with existing common terminal device, is connect by 485 communication interfaces with PLC controller, human-computer interaction interface terminal operation is convenient
Simply, and it is intelligent.The output end of the input terminal connection PLC controller of alarm, carries out according to the control signal of controller
Buzzer etc. can be used to realize in abnormal alarm, alarm.
Specifically, automatic protective system includes: the first compressor current collector 71, for acquiring the drive of the first compressor
Streaming current signal；Second compressor current collector 72, for acquiring the driving current signal of the second compressor；First compressor
Exhaust exit temperature sensor 73, the refrigerant delivery temperature for the first compressor；Second compressor air-discharging outlet temperature sensing
Device 74, the refrigerant delivery temperature for the second compressor；First compressor air-discharging outlet pressure sensor 75, for the first compression
The refrigerant pressure at expulsion of machine；Second compressor air-discharging outlet pressure sensor 76, the refrigerant pressure at expulsion for the second compressor；
Oil level detection sensor 77, for acquiring the oil mass information in oil tank.
Wherein, PLC controller is set with compressor current upper limit value, delivery temperature and pressure at expulsion upper limit value, by connecing
Receive the first compressor current collector 71, the second compressor current collector 72, the first compressor air-discharging outlet temperature sensor
73, the second compressor air-discharging outlet temperature sensor 74, the first compressor air-discharging outlet pressure sensor 75, the second compressor row
The signal of gas outlet pressure sensor 76, signal is issued to the control circuit of the first compressor, the second compressor based on the received
Instruction, when any one in the signal of acquisition is more than setting upper limit value, PLC controller according to setting so that system stalls,
It realizes that the overcurrent protection to refrigeration system, high temperature and pressure are protected, avoids equipment from safety accident occur, improve the reliable of equipment
Property.Meanwhile the above signal is also transferred to alarm, warning note occurs.In addition, monitored by oil level detection sensor 77
Oil mass signal is also transmitted to alarm and warning note occurs.
The embodiment of the present invention also provides a kind of control method of low-temperature cold wind refrigeration system, comprising the following steps:
The temperature of low-temperature cold wind in real-time detection gas transfer pipeline 30 judges the temperature and preset threshold of low-temperature cold wind
Size；Wherein, preset threshold is any setting numerical value between -20 DEG C to -60 DEG C.
If temperature >=preset threshold of low-temperature cold wind, control gas refrigeration pipeline 31 is in connected state and gas bypass pipe
Road 32 is in an off state；
If the temperature < preset threshold of low-temperature cold wind, control gas refrigeration pipeline 31 is in an off state and gas bypass pipe
Road 32 is in connected state.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to the above embodiments,
The technical field those of ordinary skill within the scope of knowledge, can also make without departing from the purpose of the present invention
Various change out.
Claims (9)
1. a kind of low-temperature cold wind refrigeration system characterized by comprising
First refrigeration pipeline constitutes the first compressor, the first condenser, the first capillary of refrigerant circulation circuit including being sequentially connected
Pipe group and the first evaporator；
Second refrigeration pipeline constitutes the second compressor, the second condenser, the second capillary of refrigerant circulation circuit including being sequentially connected
Pipe group and the second evaporator；And
Gas transfer pipeline, for conveying compressed gas, the flow direction of the air shooter curb compressed gas successively with
First evaporator, second evaporator connection, so that carrying out heat exchange between compressed gas and refrigerant.
2. low-temperature cold wind refrigeration system according to claim 1, it is characterised in that: the gas transfer pipeline includes successively
It the gas refrigeration pipeline that is connect with first evaporator, second evaporator and is arranged in parallel with the gas refrigeration pipeline
Gas bypass pipeline；Further include control the gas refrigeration pipeline, the gas bypass pipeline on off operating mode controller.
3. low-temperature cold wind refrigeration system according to claim 2, it is characterised in that: the gas transfer pipeline further includes setting
The air inlet port and air outlet before and after the gas refrigeration pipeline, gas bypass pipeline are set, is set on the air inlet port
The solenoid valve respectively with the gas refrigeration pipeline, the gas bypass piping connection is set, temperature is set in the air outlet
Sensor is spent, the temperature that the controller is detected according to the temperature sensor controls the solenoid valve to control the gas system
Cold pipeline, gas bypass pipeline connection state.
4. according to claim 1 to low-temperature cold wind refrigeration system described in 3 any one, it is characterised in that: further include so that institute
State the heat exchanger that the refrigerant in refrigerant and second refrigeration pipeline in the first refrigeration pipeline carries out heat exchange, the heat exchanger
Between the first capillary group and first evaporator, the heat exchanger is in second condenser and described the
Between two capillary groups.
5. according to claim 1 to low-temperature cold wind refrigeration system described in 3 any one, it is characterised in that: first compression
Machine and/or the second compressor are frequency-changeable compressor.
6. according to claim 1 to low-temperature cold wind refrigeration system described in 3 any one, it is characterised in that: further include protecting automatically
Protecting system, the automatic protective system include:
First compressor current collector, for acquiring the driving current signal of first compressor；
Second compressor current collector, for acquiring the driving current signal of second compressor；
First compressor air-discharging outlet temperature sensor, the refrigerant delivery temperature for first compressor；
Second compressor air-discharging outlet temperature sensor, the refrigerant delivery temperature for second compressor；
First compressor air-discharging outlet pressure sensor, the refrigerant pressure at expulsion for first compressor；
Second compressor air-discharging outlet pressure sensor, the refrigerant pressure at expulsion for second compressor；
PLC controller, for receiving the first compressor current collector, the second compressor current collector, the first compressor row
Gas outlet temperature sensor, the second compressor air-discharging outlet temperature sensor, the first compressor air-discharging outlet pressure sensor and
The signal of second compressor air-discharging outlet pressure sensor, according to the work for receiving the first compressor of signal control, the second compressor
Make state.
7. a kind of low-temperature cold wind micro lubricating cooling system, which is characterized in that including described in claim 1 to 6 any one
Low-temperature cold wind refrigeration system, lubricant medium transfer pipeline and atomising device, the gas transfer pipeline, lubricant medium conveying
Pipeline is connect with the atomising device respectively.
8. a kind of control method of low-temperature cold wind refrigeration system described in claim 2 to 6 any one, which is characterized in that including
Following steps:
The temperature of low-temperature cold wind in gas transfer pipeline described in real-time detection, judge low-temperature cold wind temperature and preset threshold it is big
It is small；
If temperature >=preset threshold of low-temperature cold wind, controls the gas refrigeration pipeline and be in connected state and the gas bypass
Pipeline is in an off state；
If the temperature < preset threshold of low-temperature cold wind, controls the gas refrigeration pipeline and be in an off state and the gas bypass
Pipeline is in connected state.
9. the control method of low-temperature cold wind refrigeration system according to claim 8, it is characterised in that: the preset threshold
For any setting numerical value between -20 DEG C to -60 DEG C.
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| CN201910462019.0A CN110375452A (en) | 2019-05-30 | 2019-05-30 | Low-temperature cold wind refrigeration system and its control method, micro lubricating cooling system |
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| CN201910462019.0A CN110375452A (en) | 2019-05-30 | 2019-05-30 | Low-temperature cold wind refrigeration system and its control method, micro lubricating cooling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112476047A (en) * | 2020-11-30 | 2021-03-12 | 河南理工大学 | Atomizing device of trace lubricating system |
| CN112496363A (en) * | 2020-11-24 | 2021-03-16 | 南京航空航天大学 | Low-temperature system for low-temperature cutting machining and using method thereof |
| CN113703502A (en) * | 2021-08-31 | 2021-11-26 | 合肥工业大学 | Refrigeration parameter regulation and control method for metal cutting processing cooling gas jet flow field |
| CN115122148A (en) * | 2022-06-16 | 2022-09-30 | 上海工程技术大学 | Low-temperature micro-lubricating system with temperature regulation function |
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| CN113703502A (en) * | 2021-08-31 | 2021-11-26 | 合肥工业大学 | Refrigeration parameter regulation and control method for metal cutting processing cooling gas jet flow field |
| CN115122148A (en) * | 2022-06-16 | 2022-09-30 | 上海工程技术大学 | Low-temperature micro-lubricating system with temperature regulation function |
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