CN104748421A - High-low temperature environment air-cooled chiller unit and control method thereof - Google Patents
High-low temperature environment air-cooled chiller unit and control method thereof Download PDFInfo
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- CN104748421A CN104748421A CN201510103831.6A CN201510103831A CN104748421A CN 104748421 A CN104748421 A CN 104748421A CN 201510103831 A CN201510103831 A CN 201510103831A CN 104748421 A CN104748421 A CN 104748421A
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
Abstract
The invention discloses a high-low temperature environment air-cooled chiller unit and a control method thereof. By adopting the cooperation of a water system and a cooling system, the overall unit is reasonable in design, intelligent in control, wide in adaptation environment range and stable and reliable in operation, energy is saved, and important significance on improving the reliability, operated for a long term and under the limiting ambient temperature, of the air-cooled chiller unit used in a data center or a process requirement place where cooling is still needed under the high temperature environment and low temperature environment is achieved.
Description
Technical field
The present invention relates to a kind of cooling by wind, particularly a kind of still can normally the high and low temperature environment cooling by wind of refrigerating operaton and control method thereof under high and low temperature environment.
Background technology
Current communication machine room, particularly large-scale data center, is generally adopt wind-cooled cold-water machine as low-temperature receiver for the indoor end of the air-conditioning equipment in communication machine room provides chilled water, thus carries out refrigeration cool-down to the indoor environment of communication machine room.Because the communication apparatus in communication machine room is in annual uninterrupted operation state substantially, and caloric value is very large, therefore, no matter is all hot summer, or in the winter of cold, for the wind-cooled cold-water machine of communication machine room, all need stable refrigerating operaton.
Current existing general cooling by wind, can realize year round cooling and run, but under 43 ~ 60 DEG C of hot environments or-50 ~-10 DEG C of low temperature environment situations, then cannot normally run in-10 ~ 43 DEG C of conventional environment areas.
In-50 ~-10 DEG C of low temperature environment situations, general cooling by wind adopts compressor cooling cooling, and compressor easily occurs that condensing pressure is too low, and height pressure reduction is on the low side, exceed compressor normal operation range, cause the not enough and oil return of refrigeration system feed flow freely not burn the problem of compressor.Although part of generating units have employed blower fan start-stop or speed governing to control the condensing pressure of refrigeration system; this mode has certain effect-10 DEG C or more temperature environments; if but be in more low temperature environment-10 ~-50 DEG C time; depend merely on start-stop or speed governing and cannot realize effective control to condensing pressure at all; even if because now stop condensation fan completely; because outdoor temperature is very low, condensing pressure can be very low, and reliability cannot be protected.
In 43 ~ 60 DEG C of hot environment situations, general cooling by wind adopts compressor cooling cooling, and compressor easily occurs that condensing pressure is too high, exceeds compressor normal operation range, cause refrigeration system delivery temperature and hypertonia, occur lubricating oil carbonization and burn the problem of compressor.
Therefore, the existing common wind-cooled cold-water captain phase is when operating in the outdoor environment temperature of low temperature or high temperature, there is larger potential safety hazard, and the cooling by wind reliability requirement being applied to data center is very high, a large amount of important communication will be caused normally to work if there is fault, existing common wind-cooled cold-water machine cannot reach instructions for use.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide a kind of high and low temperature environment cooling by wind and control method thereof, being intended to solve the existing common wind-cooled cold-water captain phase exists larger potential safety hazard when operating in low temperature or hot room external environment, cannot meet the problem of data center's instructions for use.
Technical scheme of the present invention is as follows:
A kind of high and low temperature environment cooling by wind, wherein, comprises refrigeration system, air-conditioning secondary refrigerant system, axial flow blower cooling system and automatic control system; Described refrigeration system comprises compressor, condenser, evaporimeter and pressure sensor; Described air-conditioning secondary refrigerant system comprises surface cooler, triple valve, water pump, and surface cooler is arranged in condenser; Described axial flow blower cooling system comprises axial flow blower; Described automatic control system comprises inflow temperature sensor, leaving water temperature sensors, environment temperature sensor, sensor data acquisition system and central control system; The a interface of described triple valve is connected with one end of evaporimeter, and the other end of evaporimeter is connected with water pump one end, and the water pump other end connects air conditioning pipe system; The b interface of triple valve connects air-conditioning refrigerating medium pipeline, and the b interface of triple valve is also connected with the arrival end of surface cooler, and the port of export of surface cooler is connected with the c interface of triple valve; Evaporimeter one end is connected with compressor one end, and the compressor other end is connected with condenser one end, and the condenser other end is connected with the evaporimeter other end; Described pressure sensor is arranged between evaporimeter and condenser, and inflow temperature sensor setting is on air-conditioning refrigerating medium pipeline, and leaving water temperature sensors is arranged on the water pump other end; Described inflow temperature sensor, leaving water temperature sensors, environment temperature sensor are all connected with sensor data acquisition system with pressure sensor, sensor data acquisition system is connected with central control system, and described compressor, triple valve, water pump, axial flow blower are connected with central control system all respectively.
Described high and low temperature environment cooling by wind, wherein, described axial flow blower is connected with axial flow blower buncher, axial flow blower buncher is connected with Axial-flow fan motor speed regulator, axial flow blower buncher is connected with central control system with Axial-flow fan motor speed regulator, control Axial-flow fan motor speed regulator by central control system and speed governing is carried out to axial flow blower buncher, then speed governing is carried out to axial flow blower.
Described high and low temperature environment cooling by wind, wherein, is provided with expansion valve between described evaporimeter and pressure sensor.
Described high and low temperature environment cooling by wind; wherein; described air-conditioning refrigerating medium pipeline is connected with traffic protection device; inflow temperature sensor is placed between the b interface of traffic protection device and triple valve; traffic protection device is connected with sensor data acquisition system, and air-conditioning refrigerating medium enters high and low temperature environment cooling by wind after the flow-control of traffic protection device.
A control method for high and low temperature environment cooling by wind as described in above-mentioned any one, wherein, specifically comprises the following steps:
Steps A 00: the Inlet and outlet water temperature of setting unit;
Step B00: gather the information feed back of the pressure at expulsion of unit actual motion, Inlet and outlet water temperature, traffic protection device and environment temperature to central control system by sensor data acquisition system, central control system calculates judgement automatically, obtains a result;
Step C00: central control system is according to the unlatching of output control compressor or shutdown; the rotating speed of the stepless control Axial-flow fan motor of Axial-flow fan motor speed regulator and the condensation heat radiation air quantity of axial flow blower; control unlatching or the shutdown of water pump; control the unlatching ratio of triple valve; regulate the actual Inlet and outlet water temperature of unit in the scope of setting Inlet and outlet water temperature value, thus protection unit refrigerating operaton is in high temperature environments reliable.
The control method of described high and low temperature environment cooling by wind is wherein, as follows to the control of axial flow blower:
Step a10: the environment temperature that set environment temperature sensor detects is T
environment, environment temperature temperature difference setting value 1 is Δ t
ring setting 1, the inflow temperature T that inflow temperature sensor detects
water inlet, the refrigeration system condensing pressure numerical value P that pressure sensor detects
detection, pressure set points 1 is P
setting 1, pressure set points 2 is P
setting 2;
Step b10: central control system judges whether compressor is opened, if compressor is opened, performs step c10 to step g 10, if compressor shutdown, performs step h10 to step j10;
Step c10: central control system judges P
detectionwith P
setting 1, P
setting 2size, if P
detection≤ P
setting 1, perform steps d 10, if P
setting 1< P
detection≤ P
setting 2, perform step e10, if P
detection>P
setting 2, perform step f10;
Steps d 10: central control system controls Axial-flow fan motor and closes, and axial flow blower is closed thereupon;
Step e10: central control system judges P
detectionreduce or rise, if P
detectionreduce, perform step f10, if P
detectionrise, perform step g 10;
Step f10: central control system controls the rotating speed of the stepless reduction Axial-flow fan motor of Axial-flow fan motor speed regulator, thus reduce the rotating speed of axial flow blower, control the pressure at expulsion of refrigeration system higher than P
setting 1, make pressure at expulsion be in the safe range of compressor, guarantee that compressor can ensure high-low pressure pressure reduction at low temperatures, normal safe runs;
Step g 10: central control system controls the rotating speed of the stepless lifting Axial-flow fan motor of Axial-flow fan motor speed regulator, thus the rotating speed of lift shaft flow fan, control the pressure at expulsion of refrigeration system higher than P
setting 1, make pressure at expulsion be in the safe range of compressor, guarantee that compressor can ensure high-low pressure pressure reduction at low temperatures, normal safe runs;
Step h10: central control system judges T
environmentwith T
water inlet+ Δ t
ring setting 1size, if T
environment> T
water inlet+ Δ t
ring setting 1, perform step I 10, if T
environment≤ T
water inlet+ Δ t
ring setting 1, perform step j10;
Step I 10: central control system controls Axial-flow fan motor and shuts down, and axial flow blower is shut down thereupon;
Step j10: central control system controls Axial-flow fan motor speed regulator and regulates the rotating speed of Axial-flow fan motor to be maximum, axial flow blower presses maximum (top) speed running thereupon always.
The control method of described high and low temperature environment cooling by wind is wherein, as follows to the control of compressor:
Step a20: the leaving water temperature that setting leaving water temperature sensors detects is T
water outlet, water outlet temperature setting value is T
water outlet sets, temperature difference setting value 1 is Δ t
setting 1;
Step b20: central control system judges T
water outletwith T
water outlet sets+ Δ t
setting 1, T
water outlet sets-Δ t
setting 1size, if T
water outlet> T
water outlet sets+ Δ t
setting 1, perform step c10, if T
water outlet≤ T
water outlet sets-Δ t
setting 1, perform steps d 10, if T
water outlet sets-Δ t
setting 1<T
water outlet≤ T
water outlet sets+ Δ t
setting 1, perform step e10;
Step c10: refrigeration cooling opened by compressor;
Steps d 10: compressor cuts out and stops refrigeration cooling;
Step e10: compressor does not change standing state.
The control method of described high and low temperature environment cooling by wind is wherein, as follows to the control of axial flow blower: as follows to the control of triple valve:
Step a30: the environment temperature that set environment temperature sensor detects is T
environment, environment temperature temperature difference setting value 1 is Δ t
ring setting 1, the inflow temperature that inflow temperature sensor detects is T
water inlet, the refrigeration system condensing pressure numerical value that pressure sensor detects is P
detection, pressure set points 3 is P
setting 3, pressure set points 4 is P
setting 4, the environment temperature T that leaving water temperature sensors detects
water outlet, water outlet temperature setting value T
water outlet sets, temperature difference setting value 1 is Δ t
setting 1, temperature difference setting value 2 is Δ t
setting 2, temperature difference setting value 3 is Δ t
setting 3;
Step b30: central control system judges T
environmentwith T
water inlet+ Δ t
ring setting 1size, if T
environment> T
water inlet+ Δ t
ring setting 1, step c30 is to step h30, if T
environment≤ T
water inlet+ Δ t
ring setting 1, perform step I 30 to step m30;
Step c30: central control system judges P
detectionwith P
setting 3, P
setting 4size, if P
detection< P
setting 3, perform steps d 30, if P
setting 3≤ P
detection< P
setting 4, perform step e30 to step g 30, if P
detection> P
setting 4, perform step h30;
Steps d 30: the c-a passage complete shut-down of triple valve, b-a passage standard-sized sheet;
Step e30: central control system judges P
detectionrise or decline, if P
detectionrise, perform step f30, if P
detectiondecline, perform step g 30;
Step f30: the c-a passage ratio of triple valve increases, the corresponding minimizing of b-a passage ratio;
Step g 30: the c-a passage ratio of triple valve reduces, the corresponding increase of b-a passage ratio;
Step h30: the c-a passage standard-sized sheet of triple valve, b-a passage complete shut-down;
Step I 30: central control system judges T
water outletwith T
water outlet sets-Δ t
setting 3, T
water outlet sets-Δ t
setting 2, T
water outlet sets+ Δ t
setting 1and T
water outlet sets+ Δ t
setting 1size, if T
water outlet sets+ Δ t
setting 1>=T
water outlet> T
water outlet sets-Δ t
setting 1, perform step j30, if T
water outlet sets-Δ t
setting 1>=T
water outlet> T
water outlet sets-Δ t
setting 2, perform step l30, if T
water outlet sets-Δ t
setting 2>=T
water outlet> T
water outlet sets-Δ t
setting 3, perform step m30;
Step j30: the c-a passage standard-sized sheet of triple valve, b-a passage complete shut-down;
Step l30: the c-a passage ratio of triple valve reduces, the corresponding increase of b-a passage ratio;
Step m30: the c-a passage ratio of triple valve reduces, the corresponding increase of b-a passage ratio.
Beneficial effect of the present invention: the present invention is by providing a kind of high and low temperature environment cooling by wind and control method thereof, water system is adopted to match with refrigeration system, whole unit design rationally, control intelligence, the wide ranges that conforms, stable and reliable operation, economize energy, significant in reliability of operation for a long time and under limiting ambient temperature for the cooling by wind still needing the place of cooling to use under promoting the hot environment such as data center or process requirements and low temperature environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of high and low temperature environment cooling by wind in the present invention.
Fig. 2 is the flow chart of steps of high and low temperature environment cooling by wind control method in the present invention.
Detailed description of the invention
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.
As shown in Figure 1, this high and low temperature environment cooling by wind comprises refrigeration system, air-conditioner water system (that is air-conditioning secondary refrigerant system), axial flow blower cooling system and automatic control system; Described refrigeration system comprises compressor 110, condenser 120, evaporimeter 130 and pressure sensor 140; Described air-conditioning secondary refrigerant system comprises surface cooler 210, triple valve 220, water pump 230, and surface cooler 210 is arranged in condenser 120; Described axial flow blower cooling system comprises axial flow blower 320; Described automatic control system comprises inflow temperature sensor 420, leaving water temperature sensors 430, environment temperature sensor 440, sensor data acquisition system and central control system; The a interface of described triple valve 220 is connected with one end of evaporimeter 130, and the other end of evaporimeter 130 is connected with water pump 230 one end, and water pump 230 other end connects air conditioning pipe system; The b interface of triple valve 220 connects air-conditioning refrigerating medium pipeline, and the b interface of triple valve 220 is also connected with the arrival end of surface cooler 210, and the port of export of surface cooler 210 is connected with the c interface of triple valve 220; Evaporimeter 130 one end is connected with compressor 110 one end, and compressor 110 other end is connected with condenser 120 one end, and condenser 120 other end is connected with the evaporimeter other end; Described pressure sensor 140 is arranged between evaporimeter 130 and condenser 120, and inflow temperature sensor 420 is arranged on air-conditioning refrigerating medium pipeline, and leaving water temperature sensors 430 is arranged on water pump 230 other end; Described inflow temperature sensor 420, leaving water temperature sensors 430, environment temperature sensor 440 are all connected with sensor data acquisition system with pressure sensor 140, sensor data acquisition system is connected with central control system, and described compressor 110, triple valve 220, water pump 230, axial flow blower 320 are connected with central control system all respectively.
For the ease of carrying out speed governing to axial flow blower 320, described axial flow blower 320 is connected with axial flow blower buncher 310, axial flow blower buncher 310 is connected with Axial-flow fan motor speed regulator 410, axial flow blower buncher 310 is connected with central control system with Axial-flow fan motor speed regulator 410, control Axial-flow fan motor speed regulator 410 pairs of axial flow blower bunchers 310 by central control system and carry out speed governing, then speed governing is carried out to axial flow blower 320.
In order to control the flow of cold-producing medium in evaporimeter 130, between described evaporimeter 130 and pressure sensor 140, be provided with expansion valve 111.
In order to protect the normal operation of each equipment; described air-conditioning refrigerating medium pipeline is connected with traffic protection device 221; inflow temperature sensor 420 is placed between the b interface of traffic protection device 221 and triple valve 220; traffic protection device 221 is connected with sensor data acquisition system, and air-conditioning refrigerating medium enters high and low temperature environment cooling by wind after the flow-control of traffic protection device 221.
As shown in Figure 2, a kind of control method of high and low temperature environment cooling by wind as described above, specifically comprises the following steps:
Steps A 00: the Inlet and outlet water temperature of setting unit;
Step B00: gather the information feed back of the pressure at expulsion of unit actual motion, Inlet and outlet water temperature, traffic protection device and environment temperature to central control system by sensor data acquisition system, central control system calculates judgement automatically, obtains a result;
Step C00: central control system is according to the unlatching of output control compressor 110 or shutdown; the rotating speed of the stepless control Axial-flow fan motor 310 of Axial-flow fan motor speed regulator 410 and the condensation heat radiation air quantity of axial flow blower 320; control unlatching or the shutdown of water pump 230; control the unlatching ratio of triple valve 220; regulate the actual Inlet and outlet water temperature of unit in the scope of setting Inlet and outlet water temperature value, thus protection unit refrigerating operaton is in high temperature environments reliable.
Particularly, wherein as follows to the control of axial flow blower 320:
Step a10: the environment temperature that set environment temperature sensor 440 detects is T
environment, environment temperature temperature difference setting value 1 is Δ t
ring setting 1, the inflow temperature T that inflow temperature sensor 420 detects
water inlet, the refrigeration system condensing pressure numerical value P that pressure sensor 140 detects
detection, pressure set points 1 is P
setting 1, pressure set points 2 is P
setting 2;
Step b10: central control system judges whether compressor is opened, if compressor is opened, performs step c10 to step g 10, if compressor shutdown, performs step h10 to step j10;
Step c10: central control system judges P
detectionwith P
setting 1, P
setting 2size, if P
detection≤ P
setting 1, perform steps d 10, if P
setting 1< P
detection≤ P
setting 2, perform step e10, if P
detection>P
setting 2, perform step f10;
Steps d 10: central control system controls Axial-flow fan motor 310 and closes, and axial flow blower 320 is closed thereupon;
Step e10: central control system judges P
detectionreduce or rise, if P
detectionreduce, perform step f10, if P
detectionrise, perform step g 10;
Step f10: central control system controls the rotating speed of the stepless reduction Axial-flow fan motor 310 of Axial-flow fan motor speed regulator 410, thus reduce the rotating speed of axial flow blower 320, control the pressure at expulsion of refrigeration system higher than P
setting 1, pressure at expulsion is in the safe range of compressor 110, guarantees that compressor 110 can ensure high-low pressure pressure reduction at low temperatures, normal safe runs;
Step g 10: central control system controls the rotating speed of the stepless lifting Axial-flow fan motor 310 of Axial-flow fan motor speed regulator 410, thus the rotating speed of lift shaft flow fan 320, control the pressure at expulsion of refrigeration system higher than P
setting 1, pressure at expulsion is in the safe range of compressor 110, guarantees that compressor 110 can ensure high-low pressure pressure reduction at low temperatures, normal safe runs;
Step h10: central control system judges T
environmentwith T
water inlet+ Δ t
ring setting 1size, if T
environment> T
water inlet+ Δ t
ring setting 1, perform step I 10, if T
environment≤ T
water inlet+ Δ t
ring setting 1, perform step j10;
Step I 10: central control system controls Axial-flow fan motor 310 and shuts down, and axial flow blower 320 is shut down thereupon;
Step j10: central control system controls Axial-flow fan motor speed regulator 410 and regulates the rotating speed of Axial-flow fan motor 310 to be maximum, axial flow blower 320 presses maximum (top) speed running thereupon always.
Particularly, wherein as follows to the control of compressor 110:
Step a20: the leaving water temperature that setting leaving water temperature sensors 430 detects is T
water outlet, water outlet temperature setting value is T
water outlet sets, temperature difference setting value 1 is Δ t
setting 1;
Step b20: central control system judges T
water outletwith T
water outlet sets+ Δ t
setting 1, T
water outlet sets-Δ t
setting 1size, if T
water outlet> T
water outlet sets+ Δ t
setting 1, perform step c10, if T
water outlet≤ T
water outlet sets-Δ t
setting 1, perform steps d 10, if T
water outlet sets-Δ t
setting 1<T
water outlet≤ T
water outlet sets+ Δ t
setting 1, perform step e10;
Step c10: refrigeration cooling opened by compressor 110;
Steps d 10: compressor 110 cuts out and stops refrigeration cooling;
Step e10: compressor 110 does not change standing state.
Particularly, wherein as follows to the control of triple valve 220:
Step a30: the environment temperature that set environment temperature sensor 440 detects is T
environment, environment temperature temperature difference setting value 1 is Δ t
ring setting 1, the inflow temperature that inflow temperature sensor 420 detects is T
water inlet, the refrigeration system condensing pressure numerical value that pressure sensor 140 detects is P
detection, pressure set points 3 is P
setting 3, pressure set points 4 is P
setting 4, the environment temperature T that leaving water temperature sensors 430 detects
water outlet, water outlet temperature setting value T
water outlet sets, temperature difference setting value 1 is Δ t
setting 1, temperature difference setting value 2 is Δ t
setting 2, temperature difference setting value 3 is Δ t
setting 3;
Step b30: central control system judges T
environmentwith T
water inlet+ Δ t
ring setting 1size, if T
environment> T
water inlet+ Δ t
ring setting 1, perform step c30 to step h30, if T
environment≤ T
water inlet+ Δ t
ring setting 1, perform step I 30 to step m30;
Step c30: central control system judges P
detectionwith P
setting 3, P
setting 4size, if P
detection< P
setting 3, perform steps d 30, if P
setting 3≤ P
detection< P
setting 4, perform step e30 to step g 30, if P
detection> P
setting 4, perform step h30;
Steps d 30: the c-a passage complete shut-down of triple valve 220, b-a passage standard-sized sheet;
Step e30: central control system judges P
detectionrise or decline, if P
detectionrise, perform step f30, if P
detectiondecline, perform step g 30;
Step f30: the c-a passage ratio of triple valve 220 increases, the corresponding minimizing of b-a passage ratio;
Step g 30: the c-a passage ratio of triple valve 220 reduces, the corresponding increase of b-a passage ratio;
Step h30: the c-a passage standard-sized sheet of triple valve 220, b-a passage complete shut-down;
Step I 30: central control system judges T
water outletwith T
water outlet sets-Δ t
setting 3, T
water outlet sets-Δ t
setting 2, T
water outlet sets+ Δ t
setting 1and T
water outlet sets+ Δ t
setting 1size, if T
water outlet sets+ Δ t
setting 1>=T
water outlet> T
water outlet sets-Δ t
setting 1, perform step j30, if T
water outlet sets-Δ t
setting 1>=T
water outlet> T
water outlet sets-Δ t
setting 2, perform step l30, if T
water outlet sets-Δ t
setting 2>=T
water outlet> T
water outlet sets-Δ t
setting 3, perform step m30;
Step j30: the c-a passage standard-sized sheet of triple valve 220, b-a passage complete shut-down;
Step l30: the c-a passage ratio of triple valve 220 reduces, the corresponding increase of b-a passage ratio;
Step m30: the c-a passage ratio of triple valve 220 reduces, the corresponding increase of b-a passage ratio.
This high and low temperature environment cooling by wind adopts water system to match with refrigeration system, whole unit design rationally, control intelligence, the wide ranges that conforms, stable and reliable operation, economize energy, significant in reliability of operation for a long time and under limiting ambient temperature for the cooling by wind still needing the place of cooling to use under promoting the hot environment such as data center or process requirements and low temperature environment.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (8)
1. a high and low temperature environment cooling by wind, is characterized in that, comprises refrigeration system, air-conditioning secondary refrigerant system, axial flow blower cooling system and automatic control system; Described refrigeration system comprises compressor, condenser, evaporimeter and pressure sensor; Described air-conditioning secondary refrigerant system comprises surface cooler, triple valve, water pump, and surface cooler is arranged in condenser; Described axial flow blower cooling system comprises axial flow blower; Described automatic control system comprises inflow temperature sensor, leaving water temperature sensors, environment temperature sensor, sensor data acquisition system and central control system; The a interface of described triple valve is connected with one end of evaporimeter, and the other end of evaporimeter is connected with water pump one end, and the water pump other end connects air conditioning pipe system; The b interface of triple valve connects air-conditioning refrigerating medium pipeline, and the b interface of triple valve is also connected with the arrival end of surface cooler, and the port of export of surface cooler is connected with the c interface of triple valve; Evaporimeter one end is connected with compressor one end, and the compressor other end is connected with condenser one end, and the condenser other end is connected with the evaporimeter other end; Described pressure sensor is arranged between evaporimeter and condenser, and inflow temperature sensor setting is on air-conditioning refrigerating medium pipeline, and leaving water temperature sensors is arranged on the water pump other end; Described inflow temperature sensor, leaving water temperature sensors, environment temperature sensor are all connected with sensor data acquisition system with pressure sensor, sensor data acquisition system is connected with central control system, and described compressor, triple valve, water pump, axial flow blower are connected with central control system all respectively.
2. high and low temperature environment cooling by wind according to claim 1, it is characterized in that, described axial flow blower is connected with axial flow blower buncher, axial flow blower buncher is connected with Axial-flow fan motor speed regulator, axial flow blower buncher is connected with central control system with Axial-flow fan motor speed regulator, control Axial-flow fan motor speed regulator by central control system and speed governing is carried out to axial flow blower buncher, then speed governing is carried out to axial flow blower.
3. high and low temperature environment cooling by wind according to claim 1, is characterized in that, is provided with expansion valve between described evaporimeter and pressure sensor.
4. high and low temperature environment cooling by wind according to claim 1; it is characterized in that; described air-conditioning refrigerating medium pipeline is connected with traffic protection device; inflow temperature sensor is placed between the b interface of traffic protection device and triple valve; traffic protection device is connected with sensor data acquisition system, and air-conditioning refrigerating medium enters high and low temperature environment cooling by wind after the flow-control of traffic protection device.
5. a control method for the high and low temperature environment cooling by wind as described in claim 1-4 any one, is characterized in that, specifically comprise the following steps:
Steps A 00: the Inlet and outlet water temperature of setting unit;
Step B00: gather the information feed back of the pressure at expulsion of unit actual motion, Inlet and outlet water temperature, traffic protection device and environment temperature to central control system by sensor data acquisition system, central control system calculates judgement automatically, obtains a result;
Step C00: central control system is according to the unlatching of output control compressor or shutdown; the rotating speed of the stepless control Axial-flow fan motor of Axial-flow fan motor speed regulator and the condensation heat radiation air quantity of axial flow blower; control unlatching or the shutdown of water pump; control the unlatching ratio of triple valve; regulate the actual Inlet and outlet water temperature of unit in the scope of setting Inlet and outlet water temperature value, thus protection unit refrigerating operaton is in high temperature environments reliable.
6. the control method of high and low temperature environment cooling by wind according to claim 5, is characterized in that, as follows to the control of axial flow blower:
Step a10: the environment temperature that set environment temperature sensor detects is T
environment, environment temperature temperature difference setting value 1 is Δ t
ring setting 1, the inflow temperature T that inflow temperature sensor detects
water inlet, the refrigeration system condensing pressure numerical value P that pressure sensor detects
detection, pressure set points 1 is P
setting 1, pressure set points 2 is P
setting 2;
Step b10: central control system judges whether compressor is opened, if compressor is opened, performs step c10 to step g 10, if compressor shutdown, performs step h10 to step j10;
Step c10: central control system judges P
detectionwith P
setting 1, P
setting 2size, if P
detection≤ P
setting 1, perform steps d 10, if P
setting 1< P
detection≤ P
setting 2, perform step e10, if P
detection>P
setting 2, perform step f10;
Steps d 10: central control system controls Axial-flow fan motor and closes, and axial flow blower is closed thereupon;
Step e10: central control system judges P
detectionreduce or rise, if P
detectionreduce, perform step f10, if P
detectionrise, perform step g 10;
Step f10: central control system controls the rotating speed of the stepless reduction Axial-flow fan motor of Axial-flow fan motor speed regulator, thus reduce the rotating speed of axial flow blower, control the pressure at expulsion of refrigeration system higher than P
setting 1, make pressure at expulsion be in the safe range of compressor, guarantee that compressor can ensure high-low pressure pressure reduction at low temperatures, normal safe runs;
Step g 10: central control system controls the rotating speed of the stepless lifting Axial-flow fan motor of Axial-flow fan motor speed regulator, thus the rotating speed of lift shaft flow fan, control the pressure at expulsion of refrigeration system higher than P
setting 1, make pressure at expulsion be in the safe range of compressor, guarantee that compressor can ensure high-low pressure pressure reduction at low temperatures, normal safe runs;
Step h10: central control system judges T
environmentwith T
water inlet+ Δ t
ring setting 1size, if T
environment> T
water inlet+ Δ t
ring setting 1, perform step I 10, if T
environment≤ T
water inlet+ Δ t
ring setting 1, perform step j10;
Step I 10: central control system controls Axial-flow fan motor and shuts down, and axial flow blower is shut down thereupon;
Step j10: central control system controls Axial-flow fan motor speed regulator and regulates the rotating speed of Axial-flow fan motor to be maximum, axial flow blower presses maximum (top) speed running thereupon always.
7. the control method of high and low temperature environment cooling by wind according to claim 5, is characterized in that, as follows to the control of compressor:
Step a20: the leaving water temperature that setting leaving water temperature sensors detects is T
water outlet, water outlet temperature setting value is T
water outlet sets, temperature difference setting value 1 is Δ t
setting 1;
Step b20: central control system judges T
water outletwith T
water outlet sets+ Δ t
setting 1, T
water outlet sets-Δ t
setting 1size, if T
water outlet> T
water outlet sets+ Δ t
setting 1, perform step c10, if T
water outlet≤ T
water outlet sets-Δ t
setting 1, perform steps d 10, if T
water outlet sets-Δ t
setting 1<T
water outlet≤ T
water outlet sets+ Δ t
setting 1, perform step e10;
Step c10: refrigeration cooling opened by compressor;
Steps d 10: compressor cuts out and stops refrigeration cooling;
Step e10: compressor does not change standing state.
8. the control method of high and low temperature environment cooling by wind according to claim 5, is characterized in that, as follows to the control of axial flow blower: as follows to the control of triple valve:
Step a30: the environment temperature that set environment temperature sensor detects is T
environment, environment temperature temperature difference setting value 1 is Δ t
ring setting 1, the inflow temperature that inflow temperature sensor detects is T
water inlet, the refrigeration system condensing pressure numerical value that pressure sensor detects is P
detection, pressure set points 3 is P
setting 3, pressure set points 4 is P
setting 4, the environment temperature T that leaving water temperature sensors detects
water outlet, water outlet temperature setting value T
water outlet sets, temperature difference setting value 1 is Δ t
setting 1, temperature difference setting value 2 is Δ t
setting 2, temperature difference setting value 3 is Δ t
setting 3;
Step b30: central control system judges T
environmentwith T
water inlet+ Δ t
ring setting 1size, if T
environment> T
water inlet+ Δ t
ring setting 1, step c30 is to step h30, if T
environment≤ T
water inlet+ Δ t
ring setting 1, perform step I 30 to step m30;
Step c30: central control system judges P
detectionwith P
setting 3, P
setting 4size, if P
detection< P
setting 3, perform steps d 30, if P
setting 3≤ P
detection< P
setting 4, perform step e30 to step g 30, if P
detection> P
setting 4, perform step h30;
Steps d 30: the c-a passage complete shut-down of triple valve, b-a passage standard-sized sheet;
Step e30: central control system judges P
detectionrise or decline, if P
detectionrise, perform step f30, if P
detectiondecline, perform step g 30;
Step f30: the c-a passage ratio of triple valve increases, the corresponding minimizing of b-a passage ratio;
Step g 30: the c-a passage ratio of triple valve reduces, the corresponding increase of b-a passage ratio;
Step h30: the c-a passage standard-sized sheet of triple valve, b-a passage complete shut-down;
Step I 30: central control system judges T
water outletwith T
water outlet sets-Δ t
setting 3, T
water outlet sets-Δ t
setting 2, T
water outlet sets+ Δ t
setting 1and T
water outlet sets+ Δ t
setting 1size, if T
water outlet sets+ Δ t
setting 1>=T
water outlet> T
water outlet sets-Δ t
setting 1, perform step j30, if T
water outlet sets-Δ t
setting 1>=T
water outlet> T
water outlet sets-Δ t
setting 2, perform step l30, if T
water outlet sets-Δ t
setting 2>=T
water outlet> T
water outlet sets-Δ t
setting 3, perform step m30;
Step j30: the c-a passage standard-sized sheet of triple valve, b-a passage complete shut-down;
Step l30: the c-a passage ratio of triple valve reduces, the corresponding increase of b-a passage ratio;
Step m30: the c-a passage ratio of triple valve reduces, the corresponding increase of b-a passage ratio.
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| CN108548352A (en) * | 2018-04-20 | 2018-09-18 | 依米康科技集团股份有限公司 | A kind of computer-room air conditioning system and its control method |
| CN110953739A (en) * | 2019-12-09 | 2020-04-03 | 珠海格力电器股份有限公司 | Control method of refrigeration system, refrigeration system and refrigerator |
| CN111412594A (en) * | 2020-03-11 | 2020-07-14 | 珠海格力电器股份有限公司 | Control method and device of water multi-connected system, storage medium and water multi-connected system |
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Address after: 528313 Shunde City, Foshan province Chencun town machinery and equipment Park, No. ten, No. Road, No. 8 Applicant after: GUANGDONG SHENLING AIR-CONDITIONING EQUIPMENT CO., LTD. Address before: 528313 Shunde City, Foshan province Chencun town machinery and equipment Park, No. ten, No. Road, No. 8 Applicant before: Guangdong Shenling Air Conditioning Equipment Co., Ltd. |
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