CN101844094A - High temperature and low temperature circulating device - Google Patents
High temperature and low temperature circulating device Download PDFInfo
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- CN101844094A CN101844094A CN 201010191432 CN201010191432A CN101844094A CN 101844094 A CN101844094 A CN 101844094A CN 201010191432 CN201010191432 CN 201010191432 CN 201010191432 A CN201010191432 A CN 201010191432A CN 101844094 A CN101844094 A CN 101844094A
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Abstract
The invention relates to a high temperature and low temperature circulating device. A heating mechanism, a pre-cooling mechanism, a refrigerating mechanism, a liquid circulating mechanism and a control circuit are arranged in a shell of the high temperature and low temperature circulating device; the heating mechanism comprises a closed heating container; the pre-cooling mechanism comprises a pre-cooling condenser; the refrigerating mechanism comprises a compressor, a refrigerating condenser, a liquid storing tank, a dry filter, an expansion valve, a plate converter and a refrigerant circulating pipeline; the liquid circulating mechanism comprises a liquid feeding groove, a liquid storing groove, an oil pump and a liquid conveying pipeline; the liquid feeding groove, the liquid storing groove, a non-return valve, a circulating liquid inlet and a liquid inlet of the oil pump are sequentially communicated; a liquid outlet of the oil pump, a pre-cooling channel electromagnetic valve, the pre-cooling condenser and the heating container are sequentially communicated; the liquid outlet of the oil pump, a refrigerating/heating channel electromagnetic valve, the plate converter and the heating container are sequentially communicated; and a liquid outlet at the upper part of the heating container is communicated with a circulating liquid outlet. The high temperature and low temperature circulating device provided by the invention has the advantages of wide temperature control range, low power consumption and small volume.
Description
(1), technical field: the present invention relates to a kind of isothermal liquid circulation experiment equipment, particularly relate to a kind of high temperature and low temperature circulating device.
(2), background technology: constant temperature liquid crculating apparatus is widely used in chemistry, biology, physics laboratory, and it is the constant equipment of breadboard cold and heat source such as medical and health, chemical industry, food industry, metallurgical industry, universities and colleges, scientific research, genetic engineering, macromolecule engineering.At present, high temperature heat source in the constant equipment of cold and heat source is generally the high temperature oil bath, its temperature control section is in normal temperature to 200 degree centigrade, in warm source be generally thermostat water bath, the temperature control section 5 degrees centigrade in 98 degrees centigrade, low-temperature heat source is the cryogenic liquid circulating pump, its temperature control section is bigger, but the equality of temperature section need not changed the different cold media that carries, and influences the experimental period of researcher, uses very inconvenient.More than these all are the equipment of each self-separation, if do an experiment that contains high low temperature, then need employ three equipment, use very inconvenient, how with high, medium and low warm source comprehensively on an equipment, be a urgent problem.
(3), summary of the invention:
The technical problem to be solved in the present invention is: overcome the defective of prior art, the high temperature and low temperature circulating device that a kind of temperature-control range is wide, low in energy consumption, volume is little is provided.
Technical scheme of the present invention:
A kind of high temperature and low temperature circulating device, contain housing, be provided with heating arrangements, precooling mechanism, refrigeration mechanism, liquid cycling mechanism, control circuit in the housing, heating arrangements contains airtight heating container, heating tube is installed in the heating container, and heating container is provided with pressure-reducing valve; The precooling condenser is contained in precooling mechanism; Refrigeration mechanism contains compressor, refrigerant condenser, fluid reservoir, device for drying and filtering, expansion valve, plate changes, refrigerant circulation line, the refrigerant outlet of compressor is communicated with the refrigerant inlet of refrigerant condenser, the refrigerant outlet of refrigerant condenser is communicated with the refrigerant inlet of fluid reservoir, the refrigerant outlet of fluid reservoir is communicated with the refrigerant inlet of device for drying and filtering, the refrigerant outlet of device for drying and filtering is communicated with the refrigerant inlet of expansion valve by the refrigeration magnetic valve, the refrigerant outlet of expansion valve is communicated with the refrigerant inlet that plate changes, and the refrigerant outlet that plate changes is communicated with the refrigerant inlet of compressor; The liquid cycling mechanism contains and adds liquid bath, reservoir, oil pump, infusion pipeline, the liquid outlet that adds liquid bath is communicated with the liquid inlet of reservoir, the liquid outlet of reservoir is communicated with the circulation fluid inlet by non-return valve, the circulation fluid inlet is communicated with the liquid inlet of oil pump, the liquid outlet of oil pump is communicated with the liquid inlet of precooling condenser by precooling passage magnetic valve, the liquid outlet of precooling condenser is communicated with the bottom liquid inlet of heating container, the top liquid outlet of heating container is communicated with the circulation fluid outlet, the liquid outlet of oil pump also is communicated with by the liquid inlet that refrigeration/heat tunnel magnetic valve and plate change, the liquid outlet that plate changes is communicated with the bottom liquid inlet of heating container, and circulation fluid inlet and circulation fluid outlet are arranged on the housing; Control circuit is controlled the startup of compressor operating motor, refrigerant condenser fan electromotor, precooling condenser fan motor, Oil pump electrical machinery, heating tube and is stopped.The liquid inlet of heating container in the bottom, liquid outlet is on top, can prevent effectively that like this liquid temperature is remaining in the heating container, helps accurately controlling temperature.
The circulation fluid inlet is communicated with the middle part liquid inlet of heating container, and the circulation fluid inlet is communicated with the side liquid inlet that adds liquid bath by vent valve, and the circulation fluid inlet also is communicated with the side liquid inlet of reservoir by capillary; The temperature sensing part of described expansion valve is arranged on the refrigerant inlet place of compressor; Pressure-reducing valve is located at the middle part of heating container, and pressure-reducing valve can guarantee the pressure security in the heating container and the secondary scene.
Liquid in the reservoir does not participate in shuttling movement, is adiabatic between it and the circulating fluid, no matter the temperature of circulating fluid is high temperature or low temperature, the fluid temperature in the reservoir is all unaffected.Non-return valve can prevent that circulating fluid is back in the reservoir, has prevented unnecessary energy consumption.Capillary both can make the gas in the reservoir discharge, and also can stop circulating fluid to flow in the reservoir.
The precooling condenser, add the top that liquid bath is installed in housing, reservoir, heating container, plate change the middle part that is installed in housing, compressor, refrigerant condenser, fluid reservoir, device for drying and filtering, expansion valve, oil pump are installed in lower part of frame, the circulation fluid inlet is located at lower part of frame, and the circulation fluid outlet is located at the middle part of housing.
Control circuit contains intelligent temperature controller, thermal resistance, three-phase electric leakage protection device, three-phase ac contactor, three-phase overtemperature relay, three-phase refrigeration relay, three heat phase relays, precooling relay, passage solenoid control relay, circulation indicator lamp, refrigeration indicator lamp, burner on light, precooling indicator lamp, start button, stop button; Three-phase alternating current enters compressor operating motor and refrigerant condenser fan electromotor behind the contact of coil, the three-phase refrigeration relay of the main normally opened contact by three-phase electric leakage protection device, three-phase ac contactor, three-phase overtemperature relay successively, and the coil of refrigeration indicator lamp, refrigeration magnetic valve is attempted by between the phase power end and zero line of compressor operating motor; The output of the coil of three-phase overtemperature relay is connected with three heating tubes by the contact of three heat phase relays, and burner on light is attempted by heating tube two ends; One phase output terminal of the coil of three-phase overtemperature relay is connected with the coil of precooling condenser fan motor, precooling indicator lamp, passage solenoid control relay by the contact of precooling relay, one phase output terminal of the coil of three-phase overtemperature relay also is connected with the intermediate ends of the contact of passage solenoid control relay, the normal-closed end of the contact of passage solenoid control relay is connected with the coil of refrigeration/heat tunnel magnetic valve, and the Chang Kaiduan of the contact of passage solenoid control relay is connected with the coil of precooling passage magnetic valve; One phase output terminal of the coil of three-phase overtemperature relay is connected with Oil pump electrical machinery, circulation indicator lamp; One phase output terminal of the coil of three-phase overtemperature relay is connected with the power end of intelligent temperature controller, thermal resistance is connected with the input of intelligent temperature controller, the intermediate ends of the coil of the output of intelligent temperature controller and three heat phase relays, the contact of temperature-sensitive bag is connected, the normal-closed end of the contact of temperature-sensitive bag is connected with the coil of three-phase refrigeration relay, and the Chang Kaiduan of the contact of temperature-sensitive bag is connected with the coil of precooling relay; Be attempted by two phase output terminals of three-phase electric leakage protection device after the contact in turn series connection of the coil of start button, stop button, three-phase ac contactor, three-phase overtemperature relay, the auxiliary normally opened contact of three-phase ac contactor is attempted by the two ends of start button; Thermal resistance is arranged on the circulation fluid exit, and the temperature-sensitive bag is arranged on the refrigerant inlet place of compressor.
Three-phase refrigeration relay, three heat phase relays, precooling relay are solid-state relay; Passage solenoid control relay is the contact relay; The model of thermal resistance is Pt100; The manufacturer of intelligent temperature controller is Shanghai Yatai Instrumentation Co., Ltd., and model is CH4/902, and intelligent temperature controller is provided with operation push-button and display; The model of temperature-sensitive bag is WZA60-250 ℃; Oil pump is the anticorrosion high back pressure circulating pump of Fu Erlan.
The asbestos yarn sealing is adopted in joint in the infusion pipeline and the joint in the refrigerant circulation line; The bottom of housing is equipped with castor; Add liquid bath and be provided with loam cake; Reservoir is provided with the liquid level mirror, and housing is provided with observation window at liquid level Jing Chu; Connecting pipe in heating container, infusion pipeline and the refrigerant circulation line adopts the Cr316 stainless steel.
The peripheral passage of high-temp liquid is: the circulation fluid of getting back to the circulation fluid inlet of high temperature and low temperature circulating device from the secondary scene, enter the bottom liquid inlet of heating container after oil pump, refrigeration/heat tunnel magnetic valve, plate change, circulation fluid is heated the back is flowed into the secondary scene by the top liquid outlet of heating container import in heating container.
Middle geothermal liquid peripheral passage is: the circulation fluid of getting back to the circulation fluid inlet of high temperature and low temperature circulating device from the secondary scene, behind oil pump, precooling passage magnetic valve, precooling condenser, enter the bottom liquid inlet of heating container, flow into the import in the secondary scene at last by the top liquid outlet of heating container.
The cryogenic liquid peripheral passage is: the circulation fluid of getting back to the circulation fluid inlet of high temperature and low temperature circulating device from the secondary scene, after oil pump, refrigeration/heat tunnel magnetic valve, plate change, enter the bottom liquid inlet of heating container, flow into the import in the secondary scene at last by the top liquid outlet of heating container.
The peripheral passage of cold-producing medium is: cold-producing medium is discharged the back earlier through the refrigerant condenser cooling by the refrigerant outlet of compressor, enter the fluid reservoir precipitation again, drying filter drying again, again through refrigeration magnetic valve, the capable heat exchange of the laggard entering plate swap-in of expansion valve, last slave plate swaps out and gets back to compressor.
During the high temperature and low temperature circulating device operation, determine the liquid circulation of which peripheral passage according to the temperature value of setting by intelligent temperature controller, control simultaneously the start and stop of heating arrangements, precooling mechanism, refrigeration mechanism as required, conversion peripheral passage repeatedly wherein, through constantly adjusting, make the temperature of circulation fluid reach a steady state value.
Whole high temperature and low temperature circulating device is an airtight system, does not have the absorption of steam during low temperature, does not have the generation of mist of oil during high temperature, good environmental protection.
When using this high temperature and low temperature circulating device, keep good for a long time, earlier conduction oil to be carried out check and analysis, mainly analyze from following four aspects in order to make medium (conduction oil) performance in the liquid circulation channel:
A. viscosity: viscosity changes and shows that generally intrasystem conduction oil is polluted, thermal cracking and oxidative degradation degree.When changing greater than 15% the time, should draw attention.
B. flash-point: flash-point changes and shows that generally low generations of boiling arranged in the system, when variation greater than 20% the time, should draw attention.
C. acid number: acid number changes and shows that conduction oil is contaminated or oxidized in the system, when acid number reaches 0.5, should draw attention.
D. carbon residue: carbon residue increases and generally shows by foul, corrosion thing, severe oxidation or serious pyrolysis and caused, and when reaching 1.0 (m%), should draw attention.
After having detected conduction oil, can once operate:
1) outlet of the circulation fluid of high temperature and low temperature circulating device is connected with secondary scene import, the circulation fluid of high temperature and low temperature circulating device is entered the mouth to export with the secondary scene to be connected, and makes it to become closed-cycle system.
2) three-phase five-wire mode (three live wires, a zero line, a ground wire) power supply is connected with the power end of high temperature and low temperature circulating device; (the phase sequence relay indicator lamp in the circuit is for red) needs to change any two live wire positions if the line preface is made mistakes, and is green just correct up to the phase sequence relay indicator lamp.
3) loam cake that will add liquid bath is opened, and adds the expansion oil level (liquid level mirror mark) of conduction oil up to reservoir, opens vent valve, and power-on is pressed start button, begins to add conduction oil to whole system, up to there being liquid to overflow from vent valve.
4) close vent valve, open the operation key on the intelligent temperature controller, temperature is set to 150 degree, simultaneously from adding the expansion oil level of liquid bath liquid feeding up to reservoir.Temperature is set to 25 degree, from adding the expansion oil level of liquid bath liquid feeding up to reservoir, trial run finishes simultaneously again.
5) operation operation:
Elder generation's temperature is set: press the SET key on the intelligent temperature controller, row shows the actual measurement temperature on the display, and following row's display setting value reaches required setting value by last key or following key, withdraws from getting final product again by the SET key.
After configuring required temperature, the operation key of pressing on the intelligent temperature controller gets final product.
Beneficial effect of the present invention:
1, the present invention with heating arrangements, precooling mechanism, refrigeration mechanism comprehensive Design in a liquid recycle unit, coordinated operation mutually between each mechanism, the temperature of circulation fluid can be set arbitrarily to negative 35 degrees centigrade of sections at 280 degrees centigrade, filled up the blank of the high cryogenic liquid exchange of scientific research auxiliary equipment.Simultaneously, because with original equipment of high, medium and low three EGR boil down tos, not only saved the space,, also reduced equipment cost for the scientific research personnel provides comfortable working environment.
2, circulation fluid inlet of the present invention is communicated with the middle part liquid inlet of heating container, the circulation fluid inlet also is communicated with the side liquid inlet that adds liquid bath by vent valve, the circulation fluid inlet also is communicated with the side liquid inlet of reservoir by capillary, and heating container is provided with pressure-reducing valve.These have effectively been got rid of because the conversion of high low temperature makes choking with resentment of producing in the whole liquid circulation line, and the whole circulation device can normally be moved.
3, same circulation canal is adopted in the circulation of high temperature circulation of the present invention and low temperature, and they all change by refrigeration/heat tunnel magnetic valve, plate, enter heating container then, can reduce pipeline like this and connect, and has further dwindled machine volume, has reduced equipment cost.
4, the present invention adopts solid-state relay to carry out the power supply switching of motor and heating tube, and the solid-state relay power consumption is little, the life-span is high, switch speed is fast, electromagnetic interference is few, has improved the efficient and the reliability of whole high temperature and low temperature circulating device; Oil pump adopts the anticorrosion high back pressure circulating pump of Fu Erlan, and this circulating pump lift height has solved the breadboard high potential difference of China, has increased the area of coverage; The asbestos yarn sealing is adopted in joint in the infusion pipeline and the joint in the refrigerant circulation line, and asbestos yarn is high-low temperature resistant, anti-creep, oil resistant matter not only, and cost is low; Connecting pipe in heating container, infusion pipeline and the refrigerant circulation line adopts the Cr316 stainless steel, Cr316 stainless steel high-low temperature resistant, corrosion-resistant, and it has improved the performance of whole device.
5, the present invention adopts the Pt100 thermal resistance to carry out thermometric, adopts intelligent temperature controller to carry out temperature control, and intelligent temperature controller control accuracy height, easy and simple to handle is an a high-precision intelligent laboratory equipment.
(4), description of drawings:
Fig. 1 is the structural representation of high temperature and low temperature circulating device;
Fig. 2 is the workflow schematic diagram of high temperature and low temperature circulating device;
Fig. 3 is the structural representation of control circuit.
(5), the specific embodiment:
Referring to Fig. 1～Fig. 3, among the figure, high temperature and low temperature circulating device contains housing 1, be provided with heating arrangements, precooling mechanism, refrigeration mechanism, liquid cycling mechanism, control circuit in the housing 1, heating arrangements contains airtight heating container 2, heating tube R1, R2, R3 are installed in the heating container 2, and heating container 2 is provided with pressure-reducing valve 18; Precooling condenser 14 is contained in precooling mechanism; Refrigeration mechanism contains compressor 8, refrigerant condenser 21, fluid reservoir 25, device for drying and filtering 26, expansion valve 28, plate changes 22, refrigerant circulation line, the refrigerant outlet of compressor 8 is communicated with the refrigerant inlet of refrigerant condenser 21, the refrigerant outlet of refrigerant condenser 21 is communicated with the refrigerant inlet of fluid reservoir 25, the refrigerant outlet of fluid reservoir 25 is communicated with the refrigerant inlet of device for drying and filtering 26, the refrigerant outlet of device for drying and filtering 26 is communicated with the refrigerant inlet of expansion valve 28 by refrigeration magnetic valve 27, the refrigerant outlet of expansion valve 28 and plate change 22 refrigerant inlet and are communicated with, and plate changes 22 refrigerant outlet and is communicated with the refrigerant inlet of compressor 8; The liquid cycling mechanism contains and adds liquid bath 3, reservoir 4, oil pump 9, infusion pipeline, the liquid outlet that adds liquid bath 3 is communicated with the liquid inlet of reservoir 4, the liquid outlet of reservoir 4 is communicated with circulation fluid inlet 10 by non-return valve 7, circulation fluid inlet 10 is communicated with the liquid inlet of oil pump 9, the liquid outlet of oil pump 9 is communicated with the liquid inlet of precooling condenser 14 by precooling passage magnetic valve 12, the liquid outlet of precooling condenser 14 is communicated with the bottom liquid inlet of heating container 2, the top liquid outlet of heating container 2 is communicated with circulation fluid outlet 11, the liquid outlet of oil pump 9 also changes 22 liquid inlet by refrigeration/heat tunnel magnetic valve 13 and plate and is communicated with, plate changes 22 liquid outlet and is communicated with the bottom liquid inlet of heating container 2, and circulation fluid inlet 10 and circulation fluid outlet 11 are arranged on the housing 1; Control circuit is controlled the startup of compressor 8 work drive motor M1, refrigerant condenser 21 fan electromotor M2, precooling condenser 14 fan electromotor M4, oil pump 9 motor M 3, heating tube R1, R2, R3 and is stopped.The liquid inlet of heating container 2 in the bottom, liquid outlet is on top, can prevent effectively that like this liquid temperature are remaining in the heating container 2, helps accurately controlling temperature.
Liquid in the reservoir 4 does not participate in shuttling movement, is adiabatic between it and the circulating fluid, no matter the temperature of circulating fluid is high temperature or low temperature, the fluid temperature in the reservoir 4 is all unaffected.Non-return valve 7 can prevent that circulating fluid is back in the reservoir 4, has prevented unnecessary energy consumption.Capillary 29 both can make the gas in the reservoir 4 discharge, and also can stop circulating fluid to flow in the reservoir 4.
Control circuit contains intelligent temperature controller WK, thermal resistance RT, three-phase electric leakage protection device QF, three-phase ac contactor KM, three-phase overtemperature relay FR, three-phase refrigeration relay K 1, three heat phase relay K 2, precooling relay K 3, passage solenoid control relay K 4, circulation indicator lamp L1, refrigeration indicator lamp L2, burner on light L3, precooling indicator lamp L4, start button SB2, stop button SB1; Three-phase alternating current enters compressor 8 work drive motor M1 and refrigerant condenser 21 fan electromotor M1 behind the contact of coil, the three-phase refrigeration relay K 1 of the main normally opened contact by three-phase electric leakage protection device QF, three-phase ac contactor KM, three-phase overtemperature relay FR successively, and the coil J1 of refrigeration indicator lamp L2, refrigeration magnetic valve 27 is attempted by between the phase power end and zero line of compressor 8 work drive motor M1; The output of the coil of three-phase overtemperature relay FR is connected with three heating tube R1, R2, R3 by the contact of three heat phase relay K 2, and burner on light L3 is attempted by heating tube R1 two ends; One phase output terminal of the coil of three-phase overtemperature relay FR is by the contact and the precooling condenser 14 fan electromotor M4 of precooling relay K 3, precooling indicator lamp L4, the coil of passage solenoid control relay K 4 connects, one phase output terminal of the coil of three-phase overtemperature relay FR also is connected with the intermediate ends of the contact of passage solenoid control relay K 4, the normal-closed end of the contact of passage solenoid control relay K 4 is connected with the coil J2 of refrigeration/heat tunnel magnetic valve 13, and the Chang Kaiduan of the contact of passage solenoid control relay K 4 is connected with the coil J3 of precooling passage magnetic valve 12; One phase output terminal of the coil of three-phase overtemperature relay FR is connected with oil pump 9 motor M 3, circulation indicator lamp L1; One phase output terminal of the coil of three-phase overtemperature relay FR is connected with the power end of intelligent temperature controller WK, thermal resistance RT is connected with the input of intelligent temperature controller WK, the intermediate ends of the coil of the output of intelligent temperature controller WK and three heat phase relay K 2, the contact of temperature-sensitive bag GW is connected, the normal-closed end of the contact of temperature-sensitive bag GW is connected with the coil of three-phase refrigeration relay K 1, and the Chang Kaiduan of the contact of temperature-sensitive bag GW is connected with the coil of precooling relay K 3; Be attempted by two phase output terminals of three-phase electric leakage protection device QF after the contact in turn series connection of the coil of start button SB2, stop button SB1, three-phase ac contactor KM, three-phase overtemperature relay FR, the auxiliary normally opened contact of three-phase ac contactor KM is attempted by the two ends of start button SB2; Thermal resistance RT is arranged on circulation fluid and exports 11 places, and temperature-sensitive bag GW is arranged on the refrigerant inlet place of compressor 8.
Three-phase refrigeration relay K 1, three heat phase relay K 2, precooling relay K 3 are solid-state relay; Passage solenoid control relay K 4 is the contact relay; The model of thermal resistance RT is Pt100; The manufacturer of intelligent temperature controller WK is Shanghai Yatai Instrumentation Co., Ltd., and model is CH4/902, and intelligent temperature controller WK is provided with operation push-button and display; The model of temperature-sensitive bag GW is WZA60-250 ℃; Oil pump 9 is the anticorrosion high back pressure circulating pump of Fu Erlan.
The asbestos yarn sealing is adopted in joint in the infusion pipeline and the joint in the refrigerant circulation line; The bottom of housing 1 is equipped with castor 19; Add liquid bath 3 and be provided with loam cake 17; Reservoir 4 is provided with liquid level mirror 5, and housing 1 is provided with observation window 6 at liquid level Jing5Chu; Connecting pipe in heating container 2, infusion pipeline and the refrigerant circulation line adopts the Cr316 stainless steel.
The peripheral passage of high-temp liquid is: the circulation fluid of getting back to the circulation fluid inlet 10 of high temperature and low temperature circulating device from the secondary scene, change the bottom liquid inlet that enters heating container 2 after 22 through oil pump 9, refrigeration/heat tunnel magnetic valve 13, plate, circulation fluid is heated the back is flowed into the secondary scene by the top liquid outlet of heating container 2 import in heating container 2.
Middle geothermal liquid peripheral passage is: the circulation fluid of getting back to the circulation fluid inlet 10 of high temperature and low temperature circulating device from the secondary scene, behind oil pump 9, precooling passage magnetic valve 12, precooling condenser 14, enter the bottom liquid inlet of heating container 2, flow into the import in the secondary scene at last by the top liquid outlet of heating container 2.
The cryogenic liquid peripheral passage is: the circulation fluid of getting back to the circulation fluid inlet 10 of high temperature and low temperature circulating device from the secondary scene, change the bottom liquid inlet that enters heating container 2 after 22 through oil pump 9, refrigeration/heat tunnel magnetic valve 13, plate, flow into the import in the secondary scene at last by the top liquid outlet of heating container 2.
The peripheral passage of cold-producing medium is: cold-producing medium is discharged the back earlier through refrigerant condenser 21 coolings by the refrigerant outlet of compressor 8, enter fluid reservoir 25 precipitations again, drying filter 26 dryings again, change 22 and carry out heat exchange through refrigeration magnetic valve 27, expansion valve 28 laggard entering plates again, last slave plate changes 22 and comes out to get back to compressor 8.
During the high temperature and low temperature circulating device operation, determine the liquid circulation of which peripheral passage according to the temperature value of setting by intelligent temperature controller WK, control simultaneously the start and stop of heating arrangements, precooling mechanism, refrigeration mechanism as required, conversion peripheral passage repeatedly wherein, through constantly adjusting, make the temperature of circulation fluid reach a steady state value.
Whole high temperature and low temperature circulating device is an airtight system, does not have the absorption of steam during low temperature, does not have the generation of mist of oil during high temperature, good environmental protection.
When using this high temperature and low temperature circulating device, keep good for a long time, earlier conduction oil to be carried out check and analysis, mainly analyze from following four aspects in order to make medium (conduction oil) performance in the liquid circulation channel:
E. viscosity: viscosity changes and shows that generally intrasystem conduction oil is polluted, thermal cracking and oxidative degradation degree.When changing greater than 15% the time, should draw attention.
F. flash-point: flash-point changes and shows that generally low generations of boiling arranged in the system, when variation greater than 20% the time, should draw attention.
G. acid number: acid number changes and shows that conduction oil is contaminated or oxidized in the system, when acid number reaches 0.5, should draw attention.
H. carbon residue: carbon residue increases and generally shows by foul, corrosion thing, severe oxidation or serious pyrolysis and caused, and when reaching 1.0 (m%), should draw attention.
After having detected conduction oil, can once operate:
1) circulation fluid of high temperature and low temperature circulating device outlet 11 is connected with secondary scene import, the circulation fluid of high temperature and low temperature circulating device is entered the mouth 10 to be exported with the secondary scene and to be connected, and makes it to become closed-cycle system.
2) three-phase five-wire mode (three live wires, a zero line, a ground wire) power supply is connected with the power end of high temperature and low temperature circulating device; (the phase sequence relay indicator lamp in the circuit is for red) needs to change any two live wire positions if the line preface is made mistakes, and is green just correct up to the phase sequence relay indicator lamp.
2) loam cake 17 that will add liquid bath 3 is opened, and adds the expansion oil level (liquid level mirror mark) of conduction oil up to reservoir 4, opens vent valve 16, and power-on is pressed start button SB2, begins to add conduction oil to whole system, up to there being liquid to overflow from vent valve 16.
3) close vent valve 16, open the operation key on the intelligent temperature controller WK, temperature is set to 150 degree, simultaneously from adding the expansion oil level of liquid bath 3 liquid feedings up to reservoir 4.Temperature is set to 25 degree, from adding the expansion oil level of liquid bath 3 liquid feedings up to reservoir 4, trial run finishes simultaneously again.
5) operation operation:
Elder generation's temperature is set: press the SET key on the intelligent temperature controller WK, row shows the actual measurement temperature on the display, and following row's display setting value reaches required setting value by last key or following key, withdraws from getting final product again by the SET key.
After configuring required temperature, the operation key of pressing on the intelligent temperature controller WK gets final product.
Claims (6)
1. high temperature and low temperature circulating device, contain housing, it is characterized in that: be provided with heating arrangements, precooling mechanism, refrigeration mechanism, liquid cycling mechanism, control circuit in the housing, heating arrangements contains airtight heating container, heating tube is installed in the heating container, and heating container is provided with pressure-reducing valve; The precooling condenser is contained in precooling mechanism; Refrigeration mechanism contains compressor, refrigerant condenser, fluid reservoir, device for drying and filtering, expansion valve, plate changes, refrigerant circulation line, the refrigerant outlet of compressor is communicated with the refrigerant inlet of refrigerant condenser, the refrigerant outlet of refrigerant condenser is communicated with the refrigerant inlet of fluid reservoir, the refrigerant outlet of fluid reservoir is communicated with the refrigerant inlet of device for drying and filtering, the refrigerant outlet of device for drying and filtering is communicated with the refrigerant inlet of expansion valve by the refrigeration magnetic valve, the refrigerant outlet of expansion valve is communicated with the refrigerant inlet that plate changes, and the refrigerant outlet that plate changes is communicated with the refrigerant inlet of compressor; The liquid cycling mechanism contains and adds liquid bath, reservoir, oil pump, infusion pipeline, the liquid outlet that adds liquid bath is communicated with the liquid inlet of reservoir, the liquid outlet of reservoir is communicated with the circulation fluid inlet by non-return valve, the circulation fluid inlet is communicated with the liquid inlet of oil pump, the liquid outlet of oil pump is communicated with the liquid inlet of precooling condenser by precooling passage magnetic valve, the liquid outlet of precooling condenser is communicated with the bottom liquid inlet of heating container, the top liquid outlet of heating container is communicated with the circulation fluid outlet, the liquid outlet of oil pump also is communicated with by the liquid inlet that refrigeration/heat tunnel magnetic valve and plate change, the liquid outlet that plate changes is communicated with the bottom liquid inlet of heating container, and circulation fluid inlet and circulation fluid outlet are arranged on the housing; Control circuit is controlled the startup of compressor operating motor, refrigerant condenser fan electromotor, precooling condenser fan motor, Oil pump electrical machinery, heating tube and is stopped.
2. high temperature and low temperature circulating device according to claim 1, it is characterized in that: described circulation fluid inlet is communicated with the middle part liquid inlet of heating container, the circulation fluid inlet is communicated with the side liquid inlet that adds liquid bath by vent valve, and the circulation fluid inlet also is communicated with the side liquid inlet of reservoir by capillary; The temperature sensing part of described expansion valve is arranged on the refrigerant inlet place of compressor; Pressure-reducing valve is located at the middle part of heating container.
3. high temperature and low temperature circulating device according to claim 2, it is characterized in that: described precooling condenser, add the top that liquid bath is installed in housing, reservoir, heating container, plate change the middle part that is installed in housing, compressor, refrigerant condenser, fluid reservoir, device for drying and filtering, expansion valve, oil pump are installed in lower part of frame, the circulation fluid inlet is located at lower part of frame, and the circulation fluid outlet is located at the middle part of housing.
4. according to claim 2 or 3 described high temperature and low temperature circulating devices, it is characterized in that: described control circuit contains intelligent temperature controller, thermal resistance, three-phase electric leakage protection device, three-phase ac contactor, three-phase overtemperature relay, three-phase refrigeration relay, three heat phase relays, precooling relay, passage solenoid control relay, circulation indicator lamp, refrigeration indicator lamp, burner on light, precooling indicator lamp, start button, stop button; Three-phase alternating current enters compressor operating motor and refrigerant condenser fan electromotor behind the contact of coil, the three-phase refrigeration relay of the main normally opened contact by three-phase electric leakage protection device, three-phase ac contactor, three-phase overtemperature relay successively, and the coil of refrigeration indicator lamp, refrigeration magnetic valve is attempted by between the phase power end and zero line of compressor operating motor; The output of the coil of three-phase overtemperature relay is connected with three heating tubes by the contact of three heat phase relays, and burner on light is attempted by heating tube two ends; One phase output terminal of the coil of three-phase overtemperature relay is connected with the coil of precooling condenser fan motor, precooling indicator lamp, passage solenoid control relay by the contact of precooling relay, one phase output terminal of the coil of three-phase overtemperature relay also is connected with the intermediate ends of the contact of passage solenoid control relay, the normal-closed end of the contact of passage solenoid control relay is connected with the coil of refrigeration/heat tunnel magnetic valve, and the Chang Kaiduan of the contact of passage solenoid control relay is connected with the coil of precooling passage magnetic valve; One phase output terminal of the coil of three-phase overtemperature relay is connected with Oil pump electrical machinery, circulation indicator lamp; One phase output terminal of the coil of three-phase overtemperature relay is connected with the power end of intelligent temperature controller, thermal resistance is connected with the input of intelligent temperature controller, the intermediate ends of the coil of the output of intelligent temperature controller and three heat phase relays, the contact of temperature-sensitive bag is connected, the normal-closed end of the contact of temperature-sensitive bag is connected with the coil of three-phase refrigeration relay, and the Chang Kaiduan of the contact of temperature-sensitive bag is connected with the coil of precooling relay; Be attempted by two phase output terminals of three-phase electric leakage protection device after the contact in turn series connection of the coil of start button, stop button, three-phase ac contactor, three-phase overtemperature relay, the auxiliary normally opened contact of three-phase ac contactor is attempted by the two ends of start button; Thermal resistance is arranged on the circulation fluid exit, and the temperature-sensitive bag is arranged on the refrigerant inlet place of compressor.
5. high temperature and low temperature circulating device according to claim 4 is characterized in that: described three-phase refrigeration relay, three heat phase relays, precooling relay are solid-state relay; Passage solenoid control relay is the contact relay; The model of thermal resistance is Pt100; The model of intelligent temperature controller is CH4/902, and intelligent temperature controller is provided with operation push-button and display; The model of temperature-sensitive bag is WZA60-250 ℃; Oil pump is the anticorrosion high back pressure circulating pump of Fu Erlan.
6. according to claim 2 or 3 described high temperature and low temperature circulating devices, it is characterized in that: the asbestos yarn sealing is adopted in joint in the described infusion pipeline and the joint in the refrigerant circulation line; The bottom of described housing is equipped with castor; The described liquid bath that adds is provided with loam cake; Described reservoir is provided with the liquid level mirror, and housing is provided with observation window at liquid level Jing Chu; Connecting pipe in described heating container, infusion pipeline and the refrigerant circulation line adopts the Cr316 stainless steel.
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| CN109673717A (en) * | 2018-12-11 | 2019-04-26 | 湖南赤松亭农牧有限公司 | A kind of beef deep processing refrigerating plant |
| CN109828176A (en) * | 2019-03-14 | 2019-05-31 | 武汉理工大学 | A kind of New energy automobile motor battery high/low temperature loop test system |
| CN109991476A (en) * | 2017-12-29 | 2019-07-09 | 中电电气(上海)太阳能科技有限公司 | A kind of safety detection method of laminating machine heating station |
| CN111306886A (en) * | 2019-10-17 | 2020-06-19 | 安徽普利仪器仪表科技有限公司 | High-low temperature integrated circulator capable of remotely conveying heat-conducting medium |
| CN113793819A (en) * | 2021-09-16 | 2021-12-14 | 长江存储科技有限责任公司 | Chemical tank and temperature control method thereof |
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