CN204678733U - A kind of refrigeration system of vacuum freeze drier - Google Patents
A kind of refrigeration system of vacuum freeze drier Download PDFInfo
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- CN204678733U CN204678733U CN201520345511.7U CN201520345511U CN204678733U CN 204678733 U CN204678733 U CN 204678733U CN 201520345511 U CN201520345511 U CN 201520345511U CN 204678733 U CN204678733 U CN 204678733U
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Abstract
The utility model discloses a kind of refrigeration system of vacuum freeze drier, comprise first order compressibility, second level compressibility and third level compressibility, first order compressibility, second level compressibility and third level compressibility comprise compressor respectively, oil eliminator, condenser, flow controller and evaporimeter, the output of compressor connects the input of oil eliminator, the output of oil eliminator connects the input of condenser, the output of condenser connects flow controller input, the output of flow controller connects the input of evaporimeter, the evaporimeter of first order compressibility is the condenser of second level compressibility, the evaporimeter of second level compressibility is the condenser of third level compressibility, the first order, the second level, the tandem working of third level compressibility, the freezing environment of ultralow temperature is provided.Refrigeration system of the present utility model achieves condenser temperature-100 DEG C--110 DEG C, impels the moisture in preparation to be dried or the rapid condensation after distillation of other solvents, improves drying efficiency.
Description
Technical field
The utility model relates to vacuum freeze technical field, particularly relates to a kind of refrigeration system of vacuum freeze drier.
Background technology
Vacuum freeze drier, is first that product is freezed, then provides the suitable heat of sublimation under vacuum conditions, makes the moisture in frozen product or other solvent conversion become gaseous steam, reaches the object of product dehydrate.
The freezing process of fluid product and frozen after the condensation process of water vapour that is evaporated in dry run of solid product all need a low temperature environment.Along with medicine, the developing rapidly and extensive use of biological extraction process technology, occur many preparations containing competent cell composition, these preparations need to preserve its physicochemical property under low temperature or ultralow temperature, reach prevention, the validity for the treatment of and persistence.
Existing refrigeration system adopts two-stage cascade system, and its workflow diagram as shown in Figure 1.Described refrigeration system comprises first order compressibility and second level compressibility, and first order compressibility is the refrigeration system of refrigerant by middle temperature cold-producing medium R404A.First order compressibility is made up of first order compressor a, first order condenser b, first order flow controller c and first evaporator d.Second level compressibility is the refrigeration system of refrigerant by low-temperature level cold-producing medium R23.Second level compressibility is made up of high stage compressor e, second level condenser f, second level flow controller g and second level evaporimeter h.Two compressibilities are connected by evaporative condenser, first evaporator d i.e. second level condenser f, therefore also claim evaporative condenser.
This system can obtain the evaporating temperature of-60 DEG C ~-70 DEG C, substantially can meet the preservation requirement of some products.
But existing many biomedical products belong to high value added product, in order to more can effectively stable liquid state time physicochemical property, usually need to add some solvents as additive or excipient.More additive is used to have glucose, polyalcohols if sweet mellow wine, anhydrous solvent are as glycerine, ethanol etc.Adding of these solvents, make the mixed vapour evaporated in dry run need the ultralow temperature lower than Conventional cryogenic when condensing, current two-stage cascade system cannot reach this requirement, has had a strong impact on the drying efficiency of vacuum drier.
Summary of the invention
In order to solve the problems of the prior art, the purpose of this utility model is to provide a kind of refrigeration system of vacuum freeze drier, refrigeration system of the present utility model achieves condenser temperature at-100 DEG C--110 DEG C, impel the moisture in preparation to be dried or the rapid condensation after distillation of other solvents, improve drying efficiency.
To achieve these goals, the technical solution adopted in the utility model: a kind of refrigeration system of vacuum freeze drier, comprise first order compressibility and second level compressibility, it is characterized in that, described first order compressibility comprises the first compressor, first cold-producing medium, first oil eliminator, first condenser, first throttle device and the first evaporimeter, the first described compressor is used for the first vapor refrigerant the first refrigerant compression of low pressure being become high pressure, the output of the first described compressor connects the input of the first oil eliminator, the first described oil eliminator is for separating of the refrigeration lubrication oil in the first vapor refrigerant, the output of the first described oil eliminator connects the input of the first condenser, the first described condenser is used for the first vapor refrigerant to be condensed into first liquid cold-producing medium, the output of the first described condenser connects the input of first throttle device, described first throttle device is used for the first cold-producing medium step-down of first liquid cold-producing medium being cooled to low temperature, the output of described first throttle device connects the input of first evaporator, the first described evaporimeter is connected with second level compressibility and the first compressor respectively, for completing the heat exchange of the first cold-producing medium and second level compressibility, and the first cold-producing medium after heat exchange is introduced the first compressor, carry out the cyclic process of first order compressibility, described second level compressibility comprises the first temperature controller, second refrigerant, second compressor, second oil eliminator, second condenser, second choke, 3rd flow controller, second evaporimeter and the 3rd evaporimeter, the first described temperature controller is connected with the first evaporimeter and the second compressor respectively, for detecting and controlling to enter from the first evaporimeter the second refrigerant temperature of the second compressor, the second described compressor is used for the second vapor refrigerant second refrigerant of low pressure being compressed into high pressure, the output of the second described compressor connects the input of the second oil eliminator, the second described oil eliminator is for separating of the refrigeration lubrication oil in the second vapor refrigerant, the output of the second described oil eliminator connects the input of the second condenser, the second described condenser is the first evaporimeter, the output of the second described condenser is connected with the input of second choke and the input of the 3rd flow controller respectively, the output of described second choke connects the input of the second evaporimeter, the second described evaporimeter is used for the heat exchange between second refrigerant and circulation silicone oil, described circulation silicone oil is used for lowering the temperature to preparation to be dried, complete preparation from liquid state to solid-state process of setting, the output of the 3rd described flow controller connects the input of the 3rd evaporimeter, the 3rd described evaporimeter is connected with third level compressibility and the second compressor respectively, for completing the heat exchange of second refrigerant and third level compressibility, and the second refrigerant after heat exchange is introduced the second compressor, carry out the cyclic process of second level compressibility, described refrigeration system also comprises third level compressibility, described third level compressibility comprises the second temperature controller, 3rd cold-producing medium, 3rd compressor, 3rd oil eliminator, 4th oil eliminator, 3rd condenser and the 4th flow controller, the second described temperature controller is connected with the 3rd evaporimeter and the 3rd compressor respectively, for detecting and controlling to enter from the 3rd evaporimeter the third level refrigerant temperature of the 3rd compressor, the 3rd described compressor is used for the 3rd vapor refrigerant the 3rd refrigerant compression of low pressure being become high pressure, the output of the 3rd described compressor connects the input of the 3rd oil eliminator, the output of the 3rd described oil eliminator connects the input of the 4th oil eliminator, the 3rd described oil eliminator and the 4th oil eliminator are for separating of the refrigeration lubrication oil in the 3rd vapor refrigerant, the output of the 4th described oil eliminator connects the input of the 3rd condenser, the 3rd described condenser is second level evaporimeter, the output of the 3rd described condenser is connected with the input of the 4th flow controller, the output of the 4th described flow controller is connected with the input of cold-trap, described cold-trap is steam trap, described cold-trap is connected with the 3rd compressor, for completing the 3rd heat exchange between cold-producing medium and cold-trap, and the 3rd cold-producing medium after heat exchange is introduced the 3rd compressor, carry out the cyclic process of third level compressibility.
Pass through such scheme, can ensure that circulation silicone oil temperature is below-60 DEG C, preparation to be dried is made to become solid-state from liquid rapid condensation, this three stage compression system makes the temperature of cold-trap be in-100 DEG C--110 DEG C simultaneously, achieve the effect of moisture in preparation to be dried or the rapid condensation after distillation of other solvents, improve drying efficiency.
Preferably, the first described cold-producing medium is middle temperature cold-producing medium.
More preferably, the first described cold-producing medium is R404A.
Preferably, described second refrigerant is low-temperature refrigerant.
More preferably, described second refrigerant is the one in R23, R508A or R08B.
Preferably, the 3rd described cold-producing medium is super low temperature refrigeration agent.
More preferably, the 3rd described cold-producing medium is R14.
Wherein, the first described compressor is totally-enclosed compressor or semi-closed compressor, and the first described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser, and the first described evaporimeter is plate type heat exchanger.
Wherein, the second described compressor is totally-enclosed compressor or semi-closed compressor, and the second described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser, and the second described evaporimeter and the 3rd evaporimeter are plate type heat exchanger.
Preferably, be provided with the first pressure controller in the second described compressor, the first described pressure controller achieves second refrigerant when pressure≤1.2MPa, just can enter the second compressor, ensure that the stable operation of second level compressibility.
Wherein, the 3rd described compressor is totally-enclosed compressor or semi-closed compressor, and the 3rd described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser.
Preferably, the second pressure controller is provided with in the 3rd described compressor, the second described pressure controller achieves the 3rd cold-producing medium when pressure≤1.2MPa, just can enter the 3rd compressor, ensure that the stable operation of third level compressibility and first order compressibility, second level compressibility.
Wherein, cooler is provided with between described second level oil eliminator and second level condenser.Described cooler, for reducing the temperature of second refrigerant steam, avoids that the second refrigerant temperature that recycles is too high affects the separative efficiency of the second oil eliminator and the refrigerating efficiency of second level compressibility.
Preferably, described second level compressibility is also provided with the first expansion vessel, the first capillary and the first check valve, and the first described expansion vessel is connected with the first check valve and the first capillary respectively.
Preferably, described third level compressibility is also provided with the second expansion vessel, the second capillary and the second check valve, and the second described expansion vessel is connected with the second check valve and the second capillary respectively.
Wherein, described refrigeration lubrication oil is POE polyester oil.
Wherein, the first described temperature controller or the second temperature controller are T-shaped thermocouple.
Compared with prior art, the beneficial effect that the utility model realizes: refrigeration system of the present utility model adopts three tier structure cooling system, obtain-100 DEG C of--110 DEG C of ultra-low temperature surroundings, also can realize dry effect for the preparation to be dried adding additive, expand the scope of application of vacuum freeze.
Accompanying drawing explanation
The utility model is further described below in conjunction with the drawings and specific embodiments:
Fig. 1 is the operating diagram of the refrigeration system of existing vacuum freeze drier;
Fig. 2 is the operating diagram of the refrigeration system of the utility model vacuum freeze drier.
Detailed description of the invention
As shown in Figure 2, a kind of refrigeration system of vacuum freeze drier, comprise first order compressibility and second level compressibility, it is characterized in that, described first order compressibility comprises the first compressor 1, first cold-producing medium, first oil eliminator 3, first condenser 4, first throttle device 5 and the first evaporimeter 6, the first described compressor 1 is for becoming the first vapor refrigerant of high pressure by the first refrigerant compression of low pressure, the output of the first described compressor 1 connects the input of the first oil eliminator 3, the first described oil eliminator 3 is for separating of the refrigeration lubrication oil in the first vapor refrigerant, the output of the first described oil eliminator 3 connects the input of the first condenser 4, the first described condenser 4 is for being condensed into first liquid cold-producing medium by the first vapor refrigerant, the output of the first described condenser 4 connects the input of first throttle device 5, described first throttle device 5 is for being cooled to the first cold-producing medium of low temperature by the step-down of first liquid cold-producing medium, the output of described first throttle device 5 connects the input of first evaporator 6, the first described evaporimeter 6 is connected with second level compressibility and the first compressor 1 respectively, for completing the heat exchange of the first cold-producing medium and second level compressibility, and the first cold-producing medium after heat exchange is introduced the first compressor 1, carry out the cyclic process of first order compressibility, described second level compressibility comprises the first temperature controller 7, second refrigerant, second compressor 9, second oil eliminator 10, second condenser, second choke 12, 3rd flow controller 13, second evaporimeter 14 and the 3rd evaporimeter 11, the first described temperature controller 7 is connected with the first evaporimeter 6 and the second compressor 9 respectively, for detecting and controlling to enter from the first evaporimeter 6 the second refrigerant temperature of the second compressor 9, the second described compressor 9 is for being compressed into the second vapor refrigerant of high pressure by the second refrigerant of low pressure, the output of the second described compressor 9 connects the input of the second oil eliminator 10, the second described oil eliminator 10 is for separating of the refrigeration lubrication oil in the second vapor refrigerant, the output of the second described oil eliminator 10 connects the input of the second condenser, the second described condenser is the first evaporimeter 6, the output of the second described condenser is connected with the input of second choke 12 and the input of the 3rd flow controller 13 respectively, the output of described second choke 12 connects the input of the second evaporimeter 14, the second described evaporimeter 14 is for the heat exchange between second refrigerant and circulation silicone oil, described circulation silicone oil is used for lowering the temperature to preparation to be dried, complete preparation from liquid state to solid-state process of setting, the output of the 3rd described flow controller 13 connects the input of the 3rd evaporimeter 11, the 3rd described evaporimeter 11 is connected with third level compressibility and the second compressor 9 respectively, for completing the heat exchange of second refrigerant and third level compressibility, and the second refrigerant after heat exchange is introduced the second compressor 9, carry out the cyclic process of second level compressibility, described refrigeration system also comprises third level compressibility, described third level compressibility comprises the second temperature controller 15, 3rd cold-producing medium, 3rd compressor 17, 3rd oil eliminator 18, 4th oil eliminator 19, 3rd condenser and the 4th flow controller 20, the second described temperature controller 15 is connected with the 3rd evaporimeter 11 and the 3rd compressor 17 respectively, for detecting and controlling to enter from the 3rd evaporimeter 11 third level refrigerant temperature of the 3rd compressor 17, the 3rd described compressor 17 is for becoming the 3rd vapor refrigerant of high pressure by the 3rd refrigerant compression of low pressure, the output of the 3rd described compressor 17 connects the input of the 3rd oil eliminator 18, the output of the 3rd described oil eliminator 18 connects the input of the 4th oil eliminator 19, the 3rd described oil eliminator 18 and the 4th oil eliminator 19 are for separating of the refrigeration lubrication oil in the 3rd vapor refrigerant, the output of the 4th described oil eliminator 19 connects the input of the 3rd condenser, the 3rd described condenser is the second evaporimeter 14, the output of the 3rd described condenser is connected with the input of the 4th flow controller 20, the output of the 4th described flow controller 20 is connected with the input of cold-trap, described cold-trap is steam trap, described cold-trap is connected with the 3rd compressor 17, for completing the 3rd heat exchange between cold-producing medium and cold-trap, and the 3rd cold-producing medium after heat exchange is introduced the 3rd compressor 17, carry out the cyclic process of third level compressibility.
Wherein, the first described cold-producing medium is middle temperature cold-producing medium.Preferably, the first described cold-producing medium is R404A.
Wherein, described second refrigerant is low-temperature refrigerant.Preferably, described second refrigerant is the one in R23, R508A or R08B.
Wherein, the 3rd described cold-producing medium is super low temperature refrigeration agent.Preferably, the 3rd described cold-producing medium is R14.
Wherein, the first described compressor 1 is totally-enclosed compressor or semi-closed compressor, and the first described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser, and the first described evaporimeter 6 is plate type heat exchanger.
Wherein, the second described compressor 9 is totally-enclosed compressor or semi-closed compressor, and the second described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser, and the second described evaporimeter 14 and the 3rd evaporimeter 11 are plate type heat exchanger.
Wherein, the first pressure controller is provided with in the second described compressor 9.
Wherein, the 3rd described compressor 17 is totally-enclosed compressor or semi-closed compressor, and the 3rd described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser.
Wherein, the second pressure controller is provided with in the 3rd described compressor 17.
Wherein, cooler 27 is provided with between the second described oil eliminator 10 and the second condenser.Described cooler 27 is blower fan forced cooler or water recirculator, under operating condition, prevents the temperature of the second refrigerant circulated in the compressibility of the second level too high, affects the separating effect of refrigeration lubrication oil.
Wherein, described second level compressibility is also provided with the first expansion vessel 21, first capillary 22 and the first check valve 23, and the first described expansion vessel 21 is connected with the first check valve 23 and the first capillary 22 respectively.
Wherein, described third level compressibility is also provided with the second expansion vessel 24, second capillary 25 and the second check valve 26, and the second described expansion vessel 24 is connected with the second check valve 26 and the second capillary 25 respectively.
Wherein, described refrigeration lubrication oil is POE polyester oil.
Wherein, the first described temperature controller 7 or the second temperature controller 15 are T-shaped thermocouple.
Start the first refrigerant vapour that the first compressor 1 sucks low pressure, the first refrigerant vapour is compressed, and discharges the first refrigerant vapour of HTHP.First refrigerant vapour of HTHP enters the first oil eliminator 3, is separated the refrigeration lubrication oil contained in the first compressor 1 exhaust steam, and is again got back to by differential pressure action in the crankcase of the first compressor 1.Enter the first condenser 4 from the first oil eliminator 3 high-temperature steam out, utilize it to force blower fan cooling coil or water cooling comb, make high temperature and high pressure steam be condensed into the liquid refrigerant of high pressure.The liquid refrigerant of high pressure enters first throttle device 5, the first cold-producing medium step-down is made to lower the temperature into cryogenic liquid, the first evaporimeter 6 is entered by the cryogenic liquid that step-down is lowered the temperature, cryogenic liquid absorbs the heat of second refrigerant steam in the compressibility of the second level, make the first cold-producing medium be converted into Low Temperature Steam by cryogenic liquid, make the second refrigerant steam-reforming in the compressibility of the second level become liquid simultaneously.First cold-producing medium of draw heat is sucked by the first compressor 1 again, and such first order compressibility constantly circulates, and completes the function of first order compressibility.
When the continuous release heat of the second refrigerant in the compressibility of the second level, during to temperature value set by the first temperature controller 7, as-10 DEG C ~-25 DEG C, automatically start the second compressor 9, the first magnetic valve time delay that the controller that is stressed controls is connected and is opened.Second compressor 9 sucks second refrigerant low-pressure steam, both vapor compression work done, discharges high temperature and high pressure steam.The second refrigerant steam of HTHP enters the second oil eliminator 10, is separated the refrigeration lubrication oil contained in the second compressor 9 exhaust steam, and is again got back to by differential pressure action in the crankcase of the second compressor 9.Enter cooler 27, second condenser successively by the second oil eliminator 10 high-temperature steam out, make the second refrigerant steam-condensation of HTHP become the liquid refrigerant of high pressure.The second liquid cold-producing medium of high pressure enters second choke 12, makes second refrigerant step-down lower the temperature into cryogenic liquid.Entered the second evaporimeter 14 by the cryogenic liquid that step-down is lowered the temperature, the heat of cryogenic liquid absorption cycle silicone oil, the temperature of circulation silicone oil is lowered, circulation silicone oil is used for lowering the temperature to preparation to be dried.The second liquid cold-producing medium absorbing heat becomes second refrigerant steam, and second refrigerant steam is sucked by the second compressor 9 again.Such second level compressibility constantly circulates, and completes the function of second level compressibility.
3rd temperature controller is installed in the side of circulation silicone oil, when the temperature setting circulation silicone oil is constant, turn on/off the first magnetic valve, heat transfer process between the second evaporimeter 14 start/end second refrigerant and circulation silicone oil, when circulation silicone oil temperature arrives setting value, the first magnetic valve is disconnected opening/closing automatically.Circulation like this, ensures that circulation silicone oil is in steady temperature.
When the temperature of circulation silicone oil reaches setting value, first magnetic valve power-off is closed, time delay after several seconds the second solenoid valves open, second refrigerant turns to the 3rd evaporimeter 11 through the 3rd flow controller 13, the heat of the 3rd refrigerant vapour in the second liquid refrigerant suction third level compressibility of low temperature, make second refrigerant be converted into Low Temperature Steam by cryogenic liquid, make the 3rd refrigerant vapour in third level compressibility change into liquid simultaneously.The second liquid cold-producing medium absorbing heat becomes second refrigerant steam, and second refrigerant steam is sucked by the second compressor 9 again.Such second level compressibility constantly circulates, and completes the function of second level compressibility.
First expansion vessel 21, first capillary 22 and the first check valve 23 is installed in the compressibility of the second level.In the compressibility running of the second level, when there is second refrigerant steam pressure > 1.2MPa, first check valve 23 is opened, the second refrigerant of elevated pressures enters the first expansion vessel 21, second refrigerant steam pressure reduces, second refrigerant after step-down enters the first capillary 22 and the second compressor 9 respectively, the second refrigerant in the compressibility of the second level is supplemented, is convenient to second level compressibility and normally works.
When the continuous release heat of the 3rd cold-producing medium of third level compressibility, during to the setting value of the second temperature controller 15, automatically start the 3rd compressor the 17, three magnetic valve time delay and connect and open.3rd compressor 17 sucks the 3rd cold-producing medium low-pressure steam, both vapor compression work done, discharges high temperature and high pressure steam.High temperature and high pressure steam enters the 3rd oil eliminator 18 and the 4th oil eliminator 19, carries out second-stage separation treatment, ensure that oily separative efficiency, prevents refrigeration lubrication oil viscosity increase under ultralow temperature from causing oil return ratio to decline, affects refrigeration.The refrigeration lubrication oil contained in the 3rd refrigerant vapour that 3rd compressor 17 is discharged, is got back to by differential pressure action in the crankcase of the 3rd compressor 17 again.Enter the 3rd evaporimeter 11 from the 3rd oil eliminator 18 and the 4th oil eliminator 19 high-temperature steam out, make high temperature and high pressure steam be condensed into the liquid refrigerant of high pressure.The liquid refrigerant of high pressure enters the 4th flow controller 20, makes the 3rd cold-producing medium step-down lower the temperature into cryogenic liquid.Entered cold-trap direct expansion by the cryogenic liquid that step-down is lowered the temperature, cryogenic liquid absorbs the heat of cold-trap, and the temperature of cold-trap reduces, and reaches the ultralow temperature of-100 ~-110 DEG C.The cold-trap environment of ultralow temperature makes the steam rapid condensation after distilling, and improves the drying efficiency of vacuum drier.3rd cold-producing medium of draw heat is sucked by the 3rd compressor 17 again.Such third level compressibility constantly circulates, and completes the function of third level compressibility.
Second expansion vessel 24, second capillary 25 and the second check valve 26 is installed in third level compressibility.In third level compressibility running, as appearance the 3rd refrigerant vapor pressure > 1.2MPa, second check valve 26 is opened, 3rd cold-producing medium of elevated pressures enters the second expansion vessel 24,3rd refrigerant vapor pressure reduces, the 3rd cold-producing medium after step-down enters the second capillary 25 and the 3rd compressor 17 respectively, the 3rd cold-producing medium in third level compressibility is supplemented, is convenient to third level compressibility and normally works.
In order to ensure the normal operation of third level compressibility, in third level compressibility, adding the pentane solvent of minute quantity, reducing the viscosity of refrigeration lubrication oil under ultralow temperature, avoiding occurring that the ice of refrigeration lubrication oil blocks up phenomenon.
Refrigeration system of the present utility model operationally, first start first order compressibility, when the first temperature controller 7 reaches design temperature, start second level compressibility, until first order compressibility and second level compressibility is stable and the second temperature controller 15 reaches design temperature time, restart third level compressibility.During shutdown, close the third level compressibility, second level compressibility and first order compressibility successively.
Refrigeration system of the present utility model adopts three tier structure cooling system, obtains-100 DEG C of--110 DEG C of ultra-low temperature surroundings, also can realize dry effect, expand the scope of application of vacuum dryer for the preparation to be dried adding additive.
Above-mentioned detailed description of the invention is exemplary, is to enable those skilled in the art understand this patent better, can not be interpreted as it is restriction this patent being comprised to scope; As long as according to this patent disclose any equivalent change done or the modification of spirit, all fall into the scope that this patent comprises.
Claims (10)
1. a refrigeration system for vacuum freeze drier, comprises first order compressibility and second level compressibility, it is characterized in that,
Described first order compressibility comprises the first compressor (1), first cold-producing medium, first oil eliminator (3), first condenser (4), first throttle device (5) and the first evaporimeter (6), described the first compressor (1) is for becoming the first vapor refrigerant of high pressure by the first refrigerant compression of low pressure, the output of described the first compressor (1) connects the input of the first oil eliminator (3), described the first oil eliminator (3) is for separating of the refrigeration lubrication oil in the first vapor refrigerant, the output of described the first oil eliminator (3) connects the input of the first condenser (4), described the first condenser (4) is for being condensed into first liquid cold-producing medium by the first vapor refrigerant, the output of described the first condenser (4) connects the input of first throttle device (5), described first throttle device (5) is for being cooled to the first cold-producing medium of low temperature by the step-down of first liquid cold-producing medium, the output of described first throttle device (5) connects the input of first evaporator (6), described the first evaporimeter (6) is connected with second level compressibility and the first compressor (1) respectively, for completing the heat exchange of the first cold-producing medium and second level compressibility, and the first cold-producing medium after heat exchange is introduced the first compressor (1), carry out the cyclic process of first order compressibility,
Described second level compressibility comprises the first temperature controller (7), second refrigerant, second compressor (9), second oil eliminator (10), second condenser, second choke (12), 3rd flow controller (13), second evaporimeter (14) and the 3rd evaporimeter (11), described the first temperature controller (7) is connected with the first evaporimeter (6) and the second compressor (9) respectively, for detecting and controlling to enter from the first evaporimeter (6) the second refrigerant temperature of the second compressor (9), described the second compressor (9) is for being compressed into the second vapor refrigerant of high pressure by the second refrigerant of low pressure, the output of described the second compressor (9) connects the input of the second oil eliminator (10), described the second oil eliminator (10) is for separating of the refrigeration lubrication oil in the second vapor refrigerant, the output of described the second oil eliminator (10) connects the input of the second condenser, the second described condenser is the first evaporimeter (6), the output of the second described condenser is connected with the input of second choke (12) and the input of the 3rd flow controller (13) respectively, the output of described second choke (12) connects the input of the second evaporimeter (14), described the second evaporimeter (14) is for the heat exchange between second refrigerant and circulation silicone oil, described circulation silicone oil is used for lowering the temperature to preparation to be dried, complete preparation from liquid state to solid-state process of setting, the output of the 3rd described flow controller (13) connects the input of the 3rd evaporimeter (11), the 3rd described evaporimeter (11) is connected with third level compressibility and the second compressor (9) respectively, for completing the heat exchange of second refrigerant and third level compressibility, and the second refrigerant after heat exchange is introduced the second compressor (9), carry out the cyclic process of second level compressibility,
Described refrigeration system also comprises third level compressibility, described third level compressibility comprises the second temperature controller (15), 3rd cold-producing medium, 3rd compressor (17), 3rd oil eliminator (18), 4th oil eliminator (19), 3rd condenser and the 4th flow controller (20), described the second temperature controller (15) is connected with the 3rd evaporimeter (11) and the 3rd compressor (17) respectively, for detecting and controlling to enter from the 3rd evaporimeter (11) third level refrigerant temperature of the 3rd compressor (17), the 3rd described compressor (17) is for becoming the 3rd vapor refrigerant of high pressure by the 3rd refrigerant compression of low pressure, the output of the 3rd described compressor (17) connects the input of the 3rd oil eliminator (18), the output of the 3rd described oil eliminator (18) connects the input of the 4th oil eliminator (19), the 3rd described oil eliminator (18) and the 4th oil eliminator (19) are for separating of the refrigeration lubrication oil in the 3rd vapor refrigerant, the output of the 4th described oil eliminator (19) connects the input of the 3rd condenser, the 3rd described condenser is the second evaporimeter (14), the output of the 3rd described condenser is connected with the input of the 4th flow controller (20), the output of the 4th described flow controller (20) is connected with the input of cold-trap, described cold-trap is steam trap, described cold-trap is connected with the 3rd compressor (17), for completing the 3rd heat exchange between cold-producing medium and cold-trap, and the 3rd cold-producing medium after heat exchange is introduced the 3rd compressor (17), carry out the cyclic process of third level compressibility.
2. refrigeration system as claimed in claim 1, it is characterized in that, the first described cold-producing medium is middle temperature cold-producing medium, and described second refrigerant is low-temperature refrigerant, and the 3rd described cold-producing medium is super low temperature refrigeration agent.
3. refrigeration system as claimed in claim 1, it is characterized in that, described the first compressor (1) is totally-enclosed compressor or semi-closed compressor, described the first condenser (4) is blower fan pressure cooling condenser or circulating water cooling type condenser, and described the first evaporimeter (6) is plate type heat exchanger.
4. refrigeration system as claimed in claim 1, it is characterized in that, described the second compressor (9) is totally-enclosed compressor or semi-closed compressor, the second described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser, and described the second evaporimeter (14) and the 3rd evaporimeter (11) are plate type heat exchanger.
5. refrigeration system as claimed in claim 1, it is characterized in that, the 3rd described compressor (17) is totally-enclosed compressor or semi-closed compressor, and the 3rd described condenser is that blower fan forces cooling condenser or circulating water cooling type condenser.
6. refrigeration system as claimed in claim 1, it is characterized in that, be provided with cooler (27) between described the second oil eliminator (10) and the second condenser, described cooler (27) is blower fan forced cooler or water recirculator.
7. refrigeration system as claimed in claim 1, it is characterized in that, described second level compressibility is also provided with the first expansion vessel (21), first capillary (22) and the first check valve (23), described the first expansion vessel (21) is connected with the first check valve (23) and the first capillary (22) respectively.
8. refrigeration system as claimed in claim 1, it is characterized in that, described third level compressibility is also provided with the second expansion vessel (24), second capillary (25) and the second check valve (26), described the second expansion vessel (24) is connected with the second check valve (26) and the second capillary (25) respectively.
9. refrigeration system as claimed in claim 1, is characterized in that, described refrigeration lubrication oil is POE polyester oil.
10. refrigeration system as claimed in claim 1, it is characterized in that, described the first temperature controller (7) or the second temperature controller (15) are T-shaped thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520345511.7U CN204678733U (en) | 2015-05-26 | 2015-05-26 | A kind of refrigeration system of vacuum freeze drier |
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| CN114857796A (en) * | 2022-05-23 | 2022-08-05 | 江苏拓米洛环境试验设备有限公司 | Refrigerating machine refrigerating system and refrigerating equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114857796A (en) * | 2022-05-23 | 2022-08-05 | 江苏拓米洛环境试验设备有限公司 | Refrigerating machine refrigerating system and refrigerating equipment |
| CN114857796B (en) * | 2022-05-23 | 2023-09-26 | 江苏拓米洛高端装备股份有限公司 | Refrigerating system of refrigerator and refrigerating equipment |
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