CN1512125A - Wide temperature range constant temperature freezing system and its control method - Google Patents
Wide temperature range constant temperature freezing system and its control method Download PDFInfo
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- CN1512125A CN1512125A CNA02159709XA CN02159709A CN1512125A CN 1512125 A CN1512125 A CN 1512125A CN A02159709X A CNA02159709X A CN A02159709XA CN 02159709 A CN02159709 A CN 02159709A CN 1512125 A CN1512125 A CN 1512125A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000007710 freezing Methods 0.000 title claims abstract description 8
- 230000008014 freezing Effects 0.000 title claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000005057 refrigeration Methods 0.000 claims description 77
- 210000005056 cell body Anatomy 0.000 claims description 19
- 230000009183 running Effects 0.000 claims description 6
- 241001131796 Botaurus stellaris Species 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000005457 ice water Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
Of the wide temperature range and constant temperature freezing system, the control method can reach the aims of constant temperature control and raising energy utilizing efficiency. The wide temperature range and constant temperature freezing system includes refrigerating machine, low temperature heat exchanger, middle temperature heat exchanger, high temperature heat exchanger, pump, three solenoid valves, temperature sensor, power regulator and controller. Its control method includes the following steps: setting the work fluid temperature of the refrigerating system; starting pump to input work fluid and water to the refrigerating system; comparing the difference between the fluid input temperature, the fluid output temperature and the set temperature with the temperature sensor; feeding the temperature difference signal to the controller to control the on-off of the solenoid valves for different heat exchangers; and heating or cooling the work fluid based on the positions of the solenoid valves.
Description
Technical field
The present invention is relevant a kind of wide temperature range constant temperature refrigeration system and control method thereof, refer to especially a kind of different temperatures that the required low temperature of industrial process such as semiconductor, biochemical material, food processing, raw material or middle temperature or high temperature is provided the constant temperature working fluid refrigeration system and control the method for this refrigeration system.
Background of invention
The general required freezing equipment of processing procedure, usually adopt the refrigerant compression-type refrigerating machine, the collocation electric calorifie installation compensates automatically, reach the dual-use function of heating or cooling, and the working fluid that processing procedure is used, for example: cooling agent, non freezing solution, bittern or processing procedure liquefied mixture, keep design temperature accurately.
Known constant temperature refrigeration system 2 comprises as shown in Figure 8: the cell body 20 with intake line 27 and output pipe 28; Be series at the group Pu 26 of described output pipe 28; Place in the described cell body 20, the heat-exchangers of the plate type 21 of low-temperature receiver is provided; Place in the described cell body 20, the heater 22 of thermal source is provided; Be serially connected with described heat exchanger 21, by condenser 23, expansion valve 24 and the refrigerator that the refrigerant loop is provided that compressor 25 constitutes.Described intake line 27 provides the usefulness that working fluid inputs to cell body 20 inside, the working fluid of the required accurate design temperature of described output pipe 28 output processing procedure.
Known constant temperature refrigeration system 2 carries out temperature and feedbacks the compensation heating because of adopting one group of low-temperature receiver to carry out refrigerating function and one group of thermal source, because it is to be seated in the same cell body 20 with the heater 22 of thermal source is provided that the heat-exchangers of the plate type 21 of low-temperature receiver is provided, this mode is for the processing procedure or the thermostatic control of little loadtype, also is unlikely the unusual phenomenon of compressor 25 runnings to occur.Yet for the bigger application of long-time heat load, low-temperature receiver and thermal source be the framework of structure in same cell body altogether, causes the unusual phenomenon of high temperature mode compressor start easily.
Moreover, owing to refrigeration system designs at a certain low temperature range (for example-40 ℃～0 ℃) usually, for more than the room temperature so that the application of high temperature (for example 60 ℃～100 ℃), if keep the high temperature refrigerating function with the refrigeration system of low temperature, then excessive because of temperature difference, not only waste electric energy, to sizable injury is also arranged in service life of compressor, particularly, more can cause processing procedure energy excess waste to the process apparatus of the round-the-clock running of twenty four hours.For example such as,-40 ℃～0 ℃ approximately of known refrigeration system 2 its evaporator refrigerant temperature shown in Figure 8, but operating environment at high temperature, to make refrigerant get back to the temperature overheating of compressor 25, this overtemperature even up to 70 ℃～100 ℃, cause refrigerant suction line inside to reach high pressure conditions, cause the refrigerant intake function decay of compressor 25, even can't suck back compressor 25 cavitys smoothly, cause refrigeration system 2 disequilibriums and jeopardize whole refrigeration system, cause the backwardness of manufacturing schedule, influence very big.
Summary of the invention
Main purpose of the present invention is providing a kind of wide temperature range constant temperature refrigeration system, be to use general semiconductor, biochemical material, food processing, Wu Shui of factory that process apparatus such as raw material all can dispose (facility water) and cooling device thereof, ice water host computer for example, cooling tower etc., cooperate pipeline and some magnetic valves, according to different magnetic valve ON or the OFF of different temperatures demand control, with the working fluid (working fluid) of accurate design temperature that required low temperature of industrial process (40 ℃～25 ℃) or middle temperature (25 ℃～50 ℃) or high temperature (50 ℃～100 ℃) are provided, to save the energy and to keep the normal operation of system.
A kind of wide temperature range constant temperature refrigeration system, comprising refrigerator, low temperature heat exchanger, in warm interchanger, high-temperature heat exchanger, the group Pu, first magnetic valve, second magnetic valve, the 3rd magnetic valve, temperature-sensitive sticker, power governor and controller, described refrigerator, low temperature heat exchanger, in warm interchanger, high-temperature heat exchanger, the group Pu, first magnetic valve, second magnetic valve, the 3rd magnetic valve is to have an input and an output via the pipeline binding, working fluid is via described input input and drives through described group Pu and exported by described output, described power governor carries out load regulation to high-temperature heat exchanger, described temperature-sensitive sticker is used to set the output temperature of working fluid, described controller is controlled first magnetic valve, second magnetic valve, the switching of the 3rd magnetic valve and control the fluid different heat exchanger of flowing through, working fluid is heated or cool off, make the temperature that the temperature working fluid of output is tending towards setting and reach thermostatic control.
Described wide temperature range constant temperature refrigeration system, warm interchanger and high-temperature heat exchanger are that to place a cell body and this cell body altogether be to be located at input in described, first magnetic valve of connecting on the pipeline of described cell body, group Pu and output, on the pipeline of warm interchanger, described the 3rd magnetic valve was series on the low temperature heat exchanger pipeline and is parallel to described first magnetic valve during described second magnetic valve was series at.
Described wide temperature range constant temperature refrigeration system, described high-temperature heat exchanger is located at output with helping the Pu, and described first magnetic valve of series connection on its pipeline is during described second magnetic valve is series on the warm interchanger pipeline and be parallel to described first magnetic valve and described the 3rd magnetic valve and be series on the low temperature heat exchanger pipeline and be parallel to described first magnetic valve.
Described wide temperature range constant temperature refrigeration system, described high-temperature heat exchanger is located at input with helping the Pu, and described first magnetic valve of series connection on its pipeline is during described second magnetic valve is series on the warm interchanger pipeline and be parallel to described first magnetic valve and described the 3rd magnetic valve and be series on the low temperature heat exchanger pipeline and be parallel to described first magnetic valve.
Described wide temperature range constant temperature refrigeration system, described working fluid are cooling agent, non freezing solution, bittern or processing procedure liquefied mixture.
Described wide temperature range constant temperature refrigeration system, wherein said in warm interchanger be provided with the Wu Shui of factory.
Described wide temperature range constant temperature refrigeration system, wherein said high-temperature heat exchanger is a heater.
Another object of the present invention is in the control method that a kind of wide temperature range constant temperature refrigeration system is provided, also compare the actual input temp of working fluid by the temperature working fluid of setting refrigeration system, the temperature difference of actual output temperature and design temperature, switch first magnetic valve, second magnetic valve, the switching of the 3rd magnetic valve and control the fluid different heat exchanger of flowing through, working fluid is heated or cools off, the temperature that makes the temperature working fluid of output be tending towards setting obtains the working fluid of the accurate design temperature of low temperature (40 ℃～25 ℃) or middle temperature (25 ℃～50 ℃) or high temperature (50 ℃～100 ℃).
A kind of control method of wide temperature range constant temperature refrigeration system wherein comprises the following step:
A. set the required temperature working fluid of refrigeration system;
B. start group's Pu input service fluid to described refrigeration system, and input factory affair water is to described refrigeration system;
C. the temperature difference that compares working fluid input temp, output temperature and design temperature with temperature-sensitive sticker;
D. described temperature difference signal is delivered to controller with the flow through switching of first, second, third magnetic valve of different heat exchangers of low temperature, middle temperature and high temperature of control; And
E. according to the switching of described first, second, third magnetic valve, working fluid is heated or cool off, making the temperature working fluid of output be tending towards setting can be for the temperature of processing procedure use.
The control method of described wide temperature range constant temperature refrigeration system, wherein cryogenic applications use refrigerator provides the low-temperature receiver below 25 ℃, makes processing procedure be able to take away the heat that processing procedure produces under low temperature environment, to save the energy.
The control method of described wide temperature range constant temperature refrigeration system, wherein middle temperature application serviceability temperature are higher than factory's affair water of 25 ℃ as low-temperature receiver, can reduce the electric weight that temperature control consumed more than 25 ℃, with energy savings.
The control method of described wide temperature range constant temperature refrigeration system, wherein high temperature is used and is used high-temperature heat exchanger, this high-temperature heat exchanger is standing in refrigeration system start back to be the ON state, and finely tune with reference to the temperature difference signal of described temperature-sensitive sticker by power governor, to reach thermostatic control accurately.
Described wide temperature range constant temperature refrigeration system; when wherein said temperature working fluid demand is middle temperature or high temperature; the refrigerator of refrigeration system is with intermittence unlatching/shutdown mode control running, and is long-term under wider temperature conditions to guarantee that refrigeration system is able to, and can operate smoothly.
The present invention considers that most process apparatus environment all provides factory's affair water and cooling device thereof, equipment such as ice water host computer, cooling tower for example, its in the efficient of room temperature running all much larger than the refrigerator of evaporating temperature at-40 ℃, therefore during right-40 ℃～+ 100 ℃ wide temperature range processing procedure is used, control method of the present invention can effectively reach the purpose of thermostatic control and energy efficiency lifting, make the energy of worsening shortages be able to effectively save use, refrigerator is turned round under optimal operation conditions, promote service life.Alleged low temperature (40 ℃～25 ℃), middle temperature (25 ℃～50 ℃) and the high temperature (50 ℃～100 ℃) of the present invention must clearly not define, but selectes refrigerant and refrigerator according to user's demand.
Described purpose of the present invention or feature will be described in detail according to accompanying drawing, and appended accompanying drawing reaches for example, just as explanation but not in restriction or this creation of shrinkage limit.
Description of drawings
Fig. 1 is the allocation plan of the wide temperature range constant temperature refrigeration system of first specific embodiment controlled of control method of the present invention;
Fig. 2 is the allocation plan of the wide temperature range constant temperature refrigeration system of second specific embodiment controlled of control method of the present invention;
Fig. 3 is the allocation plan of the wide temperature range constant temperature refrigeration system of the 3rd specific embodiment controlled of control method of the present invention;
Fig. 4 is the refrigerating mode flow chart of control method of the present invention, and this refrigerating mode is to be applied to first specific embodiment shown in Figure 1;
Fig. 5 is another refrigerating mode flow chart of control method of the present invention, and this refrigerating mode is to be applied to second specific embodiment shown in Figure 2 and the 3rd specific embodiment shown in Figure 3;
Fig. 6 is the heating mode flow chart of control method of the present invention;
Fig. 7 is the flow chart of control method of the present invention;
Fig. 8 is the refrigeration system allocation plan of known technology.
The main element symbol is to as directed
10 wide temperature range constant temperature refrigeration systems
The R refrigerator
The LHX low temperature heat exchanger
Warm interchanger among the MHX
The HHX high-temperature heat exchanger
P helps the Pu
SV1 first magnetic valve
SV2 second magnetic valve
SV3 the 3rd magnetic valve
The TS1 temperature-sensitive sticker
The T1 outlet temperature
The T2 inlet temperature
The Wu Shui of FW factory
The SSR power governor
The C controller
The specific embodiment
First specific embodiment of wide temperature range constant temperature refrigeration system 10 of the present invention is please referring to Fig. 1, and this refrigeration system 10 comprises: refrigerator R, low temperature heat exchanger LHX, in warm interchanger MHX, high-temperature heat exchanger HHX, group Pu P, the first magnetic valve SV1, the second magnetic valve SV2, the 3rd magnetic valve SV3, temperature-sensitive sticker TS1, power governor SSR and controller C.
Warm interchanger MHX and high-temperature heat exchanger HHX are that to place a cell body 11 and this cell body 11 altogether be to be located at input IN in described, on the pipeline of described cell body 11, the Pu P of group and output OUT is the first magnetic valve SV1 that connecting, the described second magnetic valve SV2 is on the pipeline of warm interchanger MHX in being series at, and described the 3rd magnetic valve SV3 is series on the low temperature heat exchanger LHX pipeline and is parallel to the described first magnetic valve SV1.Described refrigerator R is the low temperature heat exchanger LHX that connecting.
Described power governor SSR is linked to described high-temperature heat exchanger HHX, AC power and described controller C with circuit respectively.But the temperature-sensitive sticker TS1 of design temperature is located among the controller C in being, this controller C is linked to the described first magnetic valve SV1, the second magnetic valve SV2 and described the 3rd magnetic valve SV3 with circuit respectively, and temperature-sensitive sticker TS1 is linking input IN and output OUT, in order to the temperature T 2 of detecting input IN and the temperature T 1 of output OUT.Relevant electric binding circuit is to be represented by dotted lines among the figure.
Described power governor SSR carries out load regulation to high-temperature heat exchanger HHX, described temperature-sensitive sticker TS1 is the output temperature that is used to set working fluid, and described controller C is the switching of the control first magnetic valve SV1, the second magnetic valve SV2, the 3rd magnetic valve SV3 and control the fluid different heat exchanger of flowing through, working fluid is heated or cool off.
Working fluid is for example: cooling agent, non freezing solution, bittern or processing procedure liquefied mixture, input in the cell body 11 and drive and export by described output OUT via described input IN, reach and export by described output OUT by the 3rd magnetic valve SV3 and low temperature heat exchanger LHX by the first magnetic valve SV1 through the Pu P of described group.
Refrigerator R provides the low-temperature receiver below low temperature heat exchanger LHX25 ℃; The affair water FW of factory is the frozen water that is higher than 25 ℃ of room temperatures for example, warm interchanger MHX during the second heat exchanger SV2 of the series connection of then flowing through reaches, warm low-temperature receiver in providing; High-temperature heat exchanger HHX is the ON state in refrigeration system 10 start backs are standing, and is finely tuned with reference to the temperature difference signal of described temperature-sensitive sticker TS1 by power governor SSR, so that temperature-compensating to be provided.
Below cooperate Fig. 1 and Fig. 7 that the control method of the wide temperature range constant temperature refrigeration system 10 of first specific embodiment is described in detail in detail.
At first set the required temperature working fluid of refrigeration system 10; Then start group's Pu P input service fluid to described refrigeration system 10, and the input affair water FW of factory is to described refrigeration system 10; The design temperature that then reads temperature-sensitive sticker TS1 is (because of design temperature is to be set by temperature-sensitive sticker TS1, so design temperature is also represented with TS1), the actual input temp T2 of working fluid and working fluid actual output temperature T1, and the height of comparison three temperature; Then according to described design temperature TS1, the actual input temp T2 of working fluid and the comparison just of the actual output temperature T1 of working fluid temperature, working fluid is heated or cools off.
More specifically, when comparing design temperature TS1, the actual input temp T2 of working fluid and the actual output temperature T1 three of working fluid temperature height as described, if T1 greater than TS1 greater than T2, then carry out refrigerating mode, whether still continue the difference of interpretation output temperature T1 and design temperature TS1 less than error value epsilon (being assumed to be ± 0.1 ℃) this moment, if still greater than error value epsilon, then proceed refrigerating mode; If less than error value epsilon, then improve the row heating mode, mat makes the output temperature T1 of working fluid be tending towards design temperature TS1 and maintains the temperature constant state of error amount, please referring to Fig. 7.Other control models of relevant relatively T1, TS1, T2 three's temperature height are not given unnecessary details in addition.
Above-mentioned refrigerating mode and heating mode are done following further specifying with reference to Fig. 4 and Fig. 6, and please cooperate Fig. 1.
As shown in Figure 4, when the working fluid of importing is cooled off, at first check design temperature TS1, when refrigeration system 10 is a cryogenic applications, then controlling the first magnetic valve SV1 by controller C is that OFF, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that ON and high-temperature heat exchanger HHX are ON, working fluid follows pipeline again through the 3rd magnetic valve SV3 low temperature heat exchanger LHX that flows through in input IN flows into cell body 11, flowed out by output OUT at last; When refrigeration system 10 is middle temperature or high temperature application, then controlling the first magnetic valve SV1 by controller C is that ON, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that OFF and high-temperature heat exchanger HHX are ON, working fluid flows in the cell body 11 from input IN, follow pipeline again through the first magnetic valve SV1, flow out by output OUT at last.
As shown in Figure 6, when the working fluid of importing is heated, no matter refrigeration system 10 is the application of low temperature, middle temperature or high temperature, be that to control the first magnetic valve SV1 by controller C be that ON, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that OFF and high-temperature heat exchanger HHX are ON, working fluid flows in the cell body 11 from input IN, accept the heating of high-temperature heat exchanger HHX, follow pipeline again, flow out by output OUT at last through the first magnetic valve SV1.
Second specific embodiment of wide temperature range constant temperature refrigeration system 10 of the present invention mainly comprises please referring to Fig. 2: refrigerator R, low temperature heat exchanger LHX, in warm interchanger MHX, high-temperature heat exchanger HHX, the group Pu P, the first magnetic valve SV1, the second magnetic valve SV2 and the 3rd magnetic valve SV3.Power governor among Fig. 2, temperature-sensitive sticker and controller all omit, and are all to be same as Fig. 1 because of its circuit connecting mode.
Among Fig. 2, high-temperature heat exchanger HHX and the Pu P of group are located at output, and the described first magnetic valve SV1 of series connection on its pipeline, described second magnetic valve is in being series on the warm interchanger MHX pipeline and be parallel to the described first magnetic valve SV1, and described the 3rd magnetic valve SV3 is series on the low temperature heat exchanger LHX pipeline and is parallel to the described first magnetic valve SV1.
The wide temperature range constant temperature refrigeration system 10 of relevant second specific embodiment shown in Figure 2, its control method also as shown in Figure 7, relevant control method please referring to the related description of first specific embodiment, is not given unnecessary details in addition.It is as follows that the refrigerating mode of thought second specific embodiment and heating mode will cooperate Fig. 5 and Fig. 6 to further specify, and please cooperate Fig. 2.
As shown in Figure 5, when the working fluid of importing is cooled off, at first check design temperature TS1, when refrigeration system 10 is a cryogenic applications, then controlling the first magnetic valve SV1 by controller C is that OFF, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that ON and high-temperature heat exchanger HHX are ON, working fluid flows into from input IN, follows pipeline again through the 3rd magnetic valve SV3 flow through the low temperature heat exchanger LHX and the high-temperature heat exchanger HHX that flows through, and is flowed out by output OUT at last; When refrigeration system 10 is middle temperature or high temperature application, then controlling the first magnetic valve SV1 by controller C is that OFF, the second magnetic valve SV2 are that ON, the 3rd magnetic valve SV3 are that OFF and high-temperature heat exchanger HHX are ON, working fluid flows into from input IN, follow the pipeline warm interchanger MHX and the high-temperature heat exchanger HHX that flows through in the second magnetic valve SV2 flows through again, flow out by output OUT at last.
As shown in Figure 6, when the working fluid of importing is heated, no matter refrigeration system 10 is the application of low temperature, middle temperature or high temperature, be that to control the first magnetic valve SV1 by controller C be that ON, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that OFF and high-temperature heat exchanger HHX are ON, working fluid flows into from input IN, follow pipeline through the first magnetic valve SV1 high-temperature heat exchanger HHX that flows through again, flow out by output OUT at last.
The 3rd specific embodiment of wide temperature range constant temperature refrigeration system 10 of the present invention is please referring to Fig. 3, and its Pu P of group and high-temperature heat exchanger HHX are located at working fluid input IN and inequality outside second specific embodiment, and all the other all are same as second specific embodiment.
The control method of the wide temperature range constant temperature refrigeration system 10 of relevant the 3rd specific embodiment also is same as first specific embodiment, repeats no more.It is as follows that the refrigerating mode of thought the 3rd specific embodiment and heating mode will cooperate Fig. 5 and Fig. 6 to further specify, and please cooperate Fig. 3.
As shown in Figure 5, when the working fluid of importing is cooled off, at first check design temperature TS1, when refrigeration system 10 is a cryogenic applications, then controlling the first magnetic valve SV1 by controller C is that OFF, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that ON and high-temperature heat exchanger HHX are ON, working fluid flows into from input IN, follows pipeline through high-temperature heat exchanger HHX and the 3rd magnetic valve SV3 that the flows through low temperature heat exchanger LHX that flows through again, is flowed out by output OUT at last; When refrigeration system 10 is middle temperature or high temperature application, then controlling the first magnetic valve SV1 by controller C is that OFF, the second magnetic valve SV2 are that ON, the 3rd magnetic valve SV3 are that OFF and high-temperature heat exchanger HHX are ON, working fluid flows into from input IN, follow pipeline through high-temperature heat exchanger HHX and flow through the second magnetic valve SV2 again through in warm interchanger MHX, flow out by output OUT at last.
As shown in Figure 6, when the working fluid of importing is heated, no matter refrigeration system 10 is the application of low temperature, middle temperature or high temperature, be that to control the first magnetic valve SV1 by controller C be that ON, the second magnetic valve SV2 are that OFF, the 3rd magnetic valve SV3 are that OFF and high-temperature heat exchanger HHX are ON, working fluid flows into from input IN, follow pipeline through the high-temperature heat exchanger HHX first magnetic valve SV1 that flows through again, flow out by output OUT at last.
High-temperature heat exchanger HHX is heater among described each embodiment, is the ON state often after refrigeration system 10 starts, and is regulated automatically according to variations in temperature by power governor.
When the temperature working fluid demand among described each embodiment was middle temperature or high temperature, the refrigerator R of refrigeration system 10 was with intermittence unlatching/shutdown mode control running, and is long-term under wider temperature conditions to guarantee that refrigeration system 10 is able to, and can operate smoothly.
Claims (12)
1, a kind of wide temperature range constant temperature refrigeration system, it is characterized in that: comprise refrigerator, low temperature heat exchanger, in warm interchanger, high-temperature heat exchanger, the group Pu, first magnetic valve, second magnetic valve, the 3rd magnetic valve, temperature-sensitive sticker, power governor and controller, described refrigerator, low temperature heat exchanger, in warm interchanger, high-temperature heat exchanger, the group Pu, first magnetic valve, second magnetic valve, the 3rd magnetic valve is to have an input and an output via the pipeline binding, working fluid is via described input input and drives through described group Pu and exported by described output, described power governor carries out load regulation to high-temperature heat exchanger, described temperature-sensitive sticker is used to set the output temperature of working fluid, described controller is controlled first magnetic valve, second magnetic valve, the switching of the 3rd magnetic valve and control the fluid different heat exchanger of flowing through, working fluid is heated or cool off, make the temperature that the temperature working fluid of output is tending towards setting and reach thermostatic control.
2, wide temperature range constant temperature refrigeration system as claimed in claim 1, it is characterized in that: warm interchanger and high-temperature heat exchanger are that to place a cell body and this cell body altogether be to be located at input in described, first magnetic valve of connecting on the pipeline of described cell body, group Pu and output, on the pipeline of warm interchanger, described the 3rd magnetic valve was series on the low temperature heat exchanger pipeline and is parallel to described first magnetic valve during described second magnetic valve was series at.
3, wide temperature range constant temperature refrigeration system as claimed in claim 1, it is characterized in that: described high-temperature heat exchanger is located at output with helping the Pu, and described first magnetic valve of series connection on its pipeline is during described second magnetic valve is series on the warm interchanger pipeline and be parallel to described first magnetic valve and described the 3rd magnetic valve and be series on the low temperature heat exchanger pipeline and be parallel to described first magnetic valve.
4, wide temperature range constant temperature refrigeration system as claimed in claim 1, it is characterized in that: described high-temperature heat exchanger is located at input with helping the Pu, and described first magnetic valve of series connection on its pipeline is during described second magnetic valve is series on the warm interchanger pipeline and be parallel to described first magnetic valve and described the 3rd magnetic valve and be series on the low temperature heat exchanger pipeline and be parallel to described first magnetic valve.
5, wide temperature range constant temperature refrigeration system as claimed in claim 1 is characterized in that: described working fluid is cooling agent, non freezing solution, bittern or processing procedure liquefied mixture.
6, wide temperature range constant temperature refrigeration system as claimed in claim 1, it is characterized in that: warm interchanger is provided with the Wu Shui of factory in described.
7, wide temperature range constant temperature refrigeration system as claimed in claim 1, it is characterized in that: described high-temperature heat exchanger is a heater.
8, a kind of control method of wide temperature range constant temperature refrigeration system is characterized in that comprising the following step:
A. set the required temperature working fluid of refrigeration system;
B. start group's Pu input service fluid to described refrigeration system, and input factory affair water is to described refrigeration system;
C. the temperature difference that compares working fluid input temp, output temperature and design temperature with temperature-sensitive sticker;
D. described temperature difference signal is delivered to controller with the flow through switching of first, second, third magnetic valve of different heat exchangers of low temperature, middle temperature and high temperature of control; And
E. according to the switching of described first, second, third magnetic valve, working fluid is heated or cool off, making the temperature working fluid of output be tending towards setting can be for the temperature of processing procedure use.
9, as the control method of wide temperature range constant temperature refrigeration system as described in the claim 8, it is characterized in that: cryogenic applications uses refrigerator that low-temperature receiver below 25 ℃ is provided.
10, as the control method of wide temperature range constant temperature refrigeration system as described in the claim 8, it is characterized in that: middle temperature is used serviceability temperature and is higher than factory's affair water of 25 ℃ as low-temperature receiver.
11, as the control method of wide temperature range constant temperature refrigeration system as described in the claim 8, it is characterized in that: high temperature is used and is used high-temperature heat exchanger, this high-temperature heat exchanger is standing in refrigeration system start back to be the ON state, and finely tune by the temperature difference signal of power governor reference temperature sensor, to reach thermostatic control accurately.
12, as the control method of wide temperature range constant temperature refrigeration system as described in the claim 8, it is characterized in that: when described temperature working fluid demand was middle temperature or high temperature, the refrigerator of refrigeration system was with intermittence unlatching/shutdown mode control running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159709 CN1265163C (en) | 2002-12-30 | 2002-12-30 | Wide temperature range constant temperature freezing system and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159709 CN1265163C (en) | 2002-12-30 | 2002-12-30 | Wide temperature range constant temperature freezing system and its control method |
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| Publication Number | Publication Date |
|---|---|
| CN1512125A true CN1512125A (en) | 2004-07-14 |
| CN1265163C CN1265163C (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02159709 Expired - Lifetime CN1265163C (en) | 2002-12-30 | 2002-12-30 | Wide temperature range constant temperature freezing system and its control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451500C (en) * | 2005-11-08 | 2009-01-14 | 财团法人工业技术研究院 | Minitype constant temperature chiller |
| CN102317724A (en) * | 2009-02-11 | 2012-01-11 | Lg电子株式会社 | A control method of a refrigerator |
| CN104914891A (en) * | 2015-06-04 | 2015-09-16 | 北京自动化技术研究院 | Cooling control system for temperature control device |
-
2002
- 2002-12-30 CN CN 02159709 patent/CN1265163C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451500C (en) * | 2005-11-08 | 2009-01-14 | 财团法人工业技术研究院 | Minitype constant temperature chiller |
| CN102317724A (en) * | 2009-02-11 | 2012-01-11 | Lg电子株式会社 | A control method of a refrigerator |
| CN102317724B (en) * | 2009-02-11 | 2013-08-21 | Lg电子株式会社 | A control method of a refrigerator |
| CN104914891A (en) * | 2015-06-04 | 2015-09-16 | 北京自动化技术研究院 | Cooling control system for temperature control device |
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| CN1265163C (en) | 2006-07-19 |
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