CN101199914A - Compound high pressure air cooling dehumidification system - Google Patents
Compound high pressure air cooling dehumidification system Download PDFInfo
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- CN101199914A CN101199914A CNA2006101669884A CN200610166988A CN101199914A CN 101199914 A CN101199914 A CN 101199914A CN A2006101669884 A CNA2006101669884 A CN A2006101669884A CN 200610166988 A CN200610166988 A CN 200610166988A CN 101199914 A CN101199914 A CN 101199914A
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Abstract
Disclosed is a combined-type refrigerator dehumidifying system for high-pressure air, including a plurality of frosting devices and a prepositive dehumidifier, wherein, the frosting devices are in parallel connection, with the evaporation temperature of each frosting device lower than 0 DEG C; the prepositive dehumidifier is in series connection with the frosting devices, with the evaporation temperature of the prepositive dehumidifier higher than 0 DEG C. The high-pressure air first passes through the prepositive dehumidifier for dehumidifying and then passes some frosting devices of a plurality of frosting device for frosting and dehumidifying, with the other frosting devices for defrosting.
Description
Technical field
The present invention is about a kind of freeze drying system of pressure-air, particularly about a kind of high pressure air cooling dehumidification system of the combined type that the frosting device of a plurality of parallel connections is connected with a preposition dehumidifier.
Background technology
Air purge is the program of many processing procedure indispensabilities, in order to obtain the dry air of moisture content very low (for example 0.01%), enter the molecular screening film after, N2 and O2 are taken out respectively, and some big molecules CO2 for example, come before the filter membrane, but the steam of the less non-inertia of molecule has many bad influences to processing procedure, can't screen with molecular film, must hydrone be taken out in humid air in the mode of dehumidifying or freezing frosting, this is the freezing air dry technology of processing procedure.
If the dehumanization method that adopts evaporator coil low-temperature surface water in air steaming device above freezing to condense, because the efficiency limitations among others that caloic passes makes that the moisture content of humid air is still very high.When air pressure during at 700kPa, when the evaporator surface temperature is 5 ℃, the ideal humidity of passing through with the calculation of thermodynamics air is about 0.00086 than (humidityratio), when the evaporator surface temperature is-15 ℃, the ideal humidity ratio is about 0.00016, only be the former 1/5, if when surface temperature is reduced to-25 ℃, ideal humidity is than more reaching 0.000053.Therefore with the method for freeze drying, the moisture content after the air-treatment can be lower than 1/10000.Yet the shortcoming of freeze drying is when long-term operation, needs time defrosting, and for example running in 24 hours needs defrosting one to three time, and defrosting cycle is to decide with frosting degree.
The pressure-air freeze drying of earliest period, often with a thick and heavy cavity, all dehumidifying of interior arrangement or frosting coil pipe, as the disclosed person of BP GB893773, this design is to combine with the compression chamber of air compressor and dehydrating unit, and shortcoming is that the common structure situation of air compressor machine and dehumidification system is serious, as long as a spare part fault, will carry out cavity dismounting maintenance, in addition volume weight excessive, be not easy to carry out the elasticity combination.
Design is in recent years handled towards the combined type mode gradually; and be connected with pressure duct; promote the elastic space that air purge is handled; and less pipeline; the required thickness of uniform pressure is less; security raising and cost reduce; for example Japan Patent discloses JP 2002/253920; JP2002/267306; JP2005/344543; adopted modular mode; carry out the processing of pressure-air drying, this creative design has reached security and has promoted; functions such as volume-diminishedization, yet these existing designs; after running a period of time; must shut down and defrost, and many wafer materials and biochemical processing procedure need running in 24 hours, and more and more higher to the requirement that reduces the air moisture content; therefore the design of other air freezing dehumidifying must be arranged, could satisfy the requirement of many wafer materials and biochemical processing procedure.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of high pressure air cooling dehumidification system of combined type, can turn round in 24 hours, take into account dehumidifying and defrosting simultaneously.
The present invention integrates idle call dehumidifying, two parallel circuits small frozen system to take turns the drying that frosting dehumidifying and VFC rule carry out pressure-air and handle, reach province can, full-time running and high-quality demand.
One preferred embodiment of compound high pressure air cooling dehumidification system of the present invention comprises a plurality of frosting devices, these frosting devices are in parallel, and the evaporating temperature of each frosting device is less than 0 degree centigrade, several frosting devices that pressure-air enters in these frosting devices carry out the frosting dehumidifying, and other frosting device then defrosts.
Above-mentioned preferred embodiment also comprises a plurality of valve bodies, is connected in these frosting devices, and corresponding to these frosting devices, and these frosting devices that these valve bodies guiding pressure-airs just enter in frosting dehumidify, and seal other frosting device to defrost.
In above-mentioned preferred embodiment, each frosting device comprises a cavity and a dehydrating unit, and this dehydrating unit carries out the frosting dehumidifying to the pressure-air by this cavity.Dehydrating unit comprises an evaporimeter, a condenser, a compressor and a capillary.Evaporimeter, condenser, compressor and capillary are connected via a refrigerant pipeline, and wherein evaporimeter and condenser are located in the cavity, and pressure-air carries out the frosting dehumidifying through evaporimeter, and then make temperature recovery through condenser.Dehydrating unit also comprises a heater, is located in the cavity, and when the sealing of frosting device defrosts, the heater heating cavity.Compressor can be inverter compressor or fixed formula compressor frequently.
Above-mentioned preferred embodiment also comprises a preposition dehumidifier, be series at these frosting devices in parallel, the evaporating temperature of this preposition dehumidifier is greater than 0 degree centigrade, and pressure-air carries out dehumidification by condensation by preposition dehumidifier earlier, and then carries out the frosting dehumidifying by these frosting devices.
In above-mentioned preferred embodiment, preposition dehumidifier comprises a cavity, a dehydrating unit and a draining valve, and dehydrating unit dehumidifies to the pressure-air by cavity, and the aqueous water that freeze-outs from pressure-air is discharged cavity via draining valve.
In above-mentioned preferred embodiment, dehydrating unit comprises an evaporimeter, a condenser, a compressor and an expansion valve, evaporimeter, condenser, compressor and expansion valve are connected via a refrigerant pipeline, wherein evaporimeter and condenser are located in this cavity, pressure-air carries out dehumidification by condensation through evaporimeter, and then makes temperature recovery through condenser.Compressor can be inverter compressor or fixed formula compressor frequently.
In above-mentioned preferred embodiment, preposition dehumidifier also comprises a temperature sensing component, and it is located in the cavity, and the temperature in the sensing cavity is also controlled dehydrating unit whereby.
The present invention is above-mentioned to be become apparent with other purpose, feature and advantage in order to allow, and a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Description of drawings
Fig. 1 is the calcspar of compound high pressure air cooling dehumidification system of the present invention.
Fig. 2 is the schematic diagram of the structure of frosting device among Fig. 1.
The primary clustering symbol description
100～preposition dehumidifier;
101～arrival end;
120～the first cavitys;
140～the first dehydrating units;
142～the first evaporimeters;
144～the first condensers;
146～expansion valve;
147～preposition condenser;
148～the first compressors;
149～frequency converter;
180～draining valve;
210,230,270,280～valve body;
220,240～frosting device;
250,260～air bleeding valve;
222～the second cavitys;
224～the second dehydrating units;
226～heater;
228～draining valve;
2242～the second evaporimeters;
2244～the second condensers;
2246～capillary;
2247～preposition condenser;
2248～the second compressors;
2249～frequency converter.
The specific embodiment
Compound high pressure air cooling dehumidification system of the present invention as shown in Figure 1, comprises the frost removal 220,240 of a preposition dehumidifier 100 and two parallel connections.Though present embodiment is to be that example is done explanation with two frost removals, the quantity of frost removal is not limited to two, can be a plurality of.
Under the condition of general arrogant compression ring border, pressurize with air compressor system (air compressor system) (not icon), for example be forced into 1～10 bar (gage), preliminary air filtration, hydrocarbon filter such as remove at function.
Through the pressure-air of preliminary treatment, introduce the arrival end 101 (shown in the arrow of dotted line) of preposition dehumidifier 100, carry out the phase I dehumidification by condensation with evaporating temperature at the preposition dehumidifier 100 (about 0～10 ℃ of evaporating temperature) of freezing point more than 0 ℃ earlier.Preposition dehumidifier 100 comprises one first cavity 120, one first dehydrating unit 140 and a draining valve 180, first dehydrating unit 140 comprises one first evaporimeter 142, one first condenser 144, an expansion valve 146, one first compressor 148, first evaporimeter 142, expansion valve 146, first condenser 144 and first compressor 148 are that the solid arrow among Fig. 1 is represented the flow direction of refrigerant with refrigerant pipeline series connection.First evaporimeter 142 and first condenser 144 are located in first cavity 120, the pressure-air that enters from arrival end 101 is in regular turn through the coil pipe of first evaporimeter 142 and the coil pipe of first condenser 144, when pressure-air during through the coil pipe of first evaporimeter 142, because first evaporimeter, 142 coil surface temperature can not be lower than 0 ℃, therefore do not have the problem of the frosting of freezing, aerial steam can condense into aqueous water in the coil surface of first evaporimeter 142, condense (film-wise condensation) or drop formula (drop-wise condensation) pattern of condensing with diaphragm type, be subjected to gravity effect and be slipped to the bottom of first cavity 120, the bottom installing water-collecting tray (not shown) of first cavity 120, and with draining valve (ball float valve member) 180 switches, carry out the outside of draining to the first cavity 120, because the pressure in first cavity 120 is higher than an atmospheric pressure, therefore airborne condensate water will be with the pattern of pressure differential, discharge first cavity 120, and reach the effect of phase I dehumidifying.
Arrival end 101 at preposition dehumidifier 100, measure the pressure (P1) of intake air simultaneously, volume flow rate (VF1), temperature (T1), relative humidity (RH1) or wet-bulb temperature, again according to desirable air outlet slit moisture content (also being humidity ratio), to judge under different air mass flows, the required water removal and the required refrigerating capacity that dehumidifies, the adjusting of these estimations and refrigerating capacity, reach by frequency conversion type first compressor 148 (comprising frequency converter 149) and the robot brain system of refrigeration system thereof, comprise first compressor, the 148 rotating speeds control shown in Figure 1 and the fine setting of expansion valve 146, because the relative humidity of first evaporimeter, 142 outlet airs is through being everlasting between 90～100%, moisture signal need not be measured, and the parameter of FEEDBACK CONTROL is carried out the automatic control of phase I dehumidifying with temperature sensing spare T2.Dehydrating unit 140 also comprises a preposition condenser (pre-condenser) 147, in order to reduce the temperature of first compressor, 148 outlet refrigerants, air themperature after making the phase I handle is near the air themperature at inlet 101, in addition, the shell of first cavity 120 must be in addition adiabatic, except preventing that shell from having condensate water, these all are the methods that improves the dehumidification process energy efficiency.
The air that the phase I dehumidification by condensation finishes, humidity ratio can be by 0.001997 (700kPa/TDB25 ℃/RH70%) reduce to 0.00086 (600kPa/TDB5 ℃/RH95%), treating capacity with flow 3m3/min is calculated, the about 0.35kg/s of air mass flow rate, about 3.98 * the 10-4kg/s of the rate that dewaters, this moment steam the latent heat of condensation and the about 2500kJ/kg of sensible heat, so required about 1kW of refrigerating capacity (about 0～10 ℃ of evaporating temperature).
If humidity ratio must be reduced to below 2/10000, above-mentioned preposition dehumidifier 100 can't be finished, therefore the present invention utilizes freezing frosting device (froster) 220 and 240, as shown in Figure 1, air after will handling the phase I is introduced 220 dehumidifying of frosting device, carry out the freeze drying of second stage, with aforesaid design example, the about 0.35kg/s of air mass flow rate, humidity ratio will be by 0.00086 (600kPa/TDB5 ℃/RH95%) reduce to 0.000163 (600kPa/TDB-15 ℃/RH95%), the second stage about 3.98 * 10-4kg/s of rate that dewaters, the about 340kJ/kg of water cure latent heat and sensible heat, the about 135W of required refrigerating capacity (evaporating temperature approximately-15 ℃) can adopt refrigerator with frequency-changeable compressor system (comprising compressor 2248 and frequency converter 2249), as shown in Figure 2.Because 220,240 every running a period of times of frosting device, evaporator surface can be covered with frost, and make the air duct constriction, stop up even, therefore defrosting regularly, the present invention carries out the action of air dewetting and defrosting with two groups of frosting devices 220 and 240 one after the others, and with two groups of air magnetic valve 210/270 and 230/280, come the direction (frosting device 220 or 240) of selected control circulation of air, when frosting device 220 carried out the frosting dehumidifying, frosting device 240 defrosted.The compressor (as shown in Figure 2) of frosting this moment device 220 starts, valve body 210/270 is opened, air bleeding valve 250 is closed; The compressor (not shown) of frosting this moment device 240 cuts out, valve body 230/280 is closed, defrost, owing to when defrosting, can produce a large amount of steam, too high for fear of the defrost process build-up of pressure, designing and arranging air valve 260 (frosting device 220 is an air bleeding valve 250), air bleeding valve 260 was opened with atmosphere and was communicated with this moment, defrost process can be used electric defrosting, if in the compressor dwell time, can melt defrosting naturally with the surrounding room temperature condition, then can be with electric defrosting.When frosting device 220 and 240 intermodulation of frosting device are operated for the previous period, the frosting device 240 of just having finished defrosting must be opened valve body 230, valve body 280 is closed, air bleeding valve 260 is opened and kept a bit of time, the humid air that firm defrosting in the frosting device 240 finishes is discharged, and with compressor start and keep a period of time, after making the running of frosting device 240 reach stable state, again valve body 230 is opened, valve body 280 is opened and air bleeding valve 260 is closed, pressure-air is converted to via the defrosting action of just carrying out frosting device 220 after 240 dehumidifying of frosting device.
Fig. 2 represents the structure of frosting device 220, because the structure of frosting device 220 and frosting device 240 is identical, so is that example is done explanation with frosting device 220 only.
In addition, though first, second compressor 148,2248 is to use inverter compressor in the present embodiment, also can uses and decide frequency formula compressor.
Though the present invention with preferred embodiment openly as above; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (14)
1. compound high pressure air cooling dehumidification system, comprise a plurality of frosting devices, these frosting devices are in parallel, and the evaporating temperature of these frosting devices is less than 0 degree centigrade, pressure-air enter in these frosting devices at least one just carry out freeze drying at the frosting device of frosting, the frosting device of frosting then defrosts.
2. compound high pressure air cooling dehumidification system according to claim 1, it also comprises a plurality of valve bodies, be connected in these frosting devices, and corresponding to these frosting devices, the frosting device that these valve bodies guiding pressure-airs just enter in frosting dehumidifies, and the frosting device that seals frosting is to defrost.
3. compound high pressure air cooling dehumidification system according to claim 1, wherein this frosting device comprises one first cavity and one first dehydrating unit, this first dehydrating unit carries out the frosting dehumidifying to the pressure-air by this first cavity.
4. compound high pressure air cooling dehumidification system according to claim 3, wherein this first dehydrating unit comprises one first evaporimeter, one first condenser, one first compressor and a capillary, this first evaporimeter, this first condenser, this first compressor and this capillary are connected via a refrigerant pipeline, wherein this first evaporimeter and this first condenser are located in this first cavity, pressure-air carries out the frosting dehumidifying through this first evaporimeter, and then makes temperature recovery through this first condenser.
5. compound high pressure air cooling dehumidification system according to claim 4, wherein this first dehydrating unit also comprises a heater, be located in this first cavity, when this frosting device sealing defrosted, this heater heated first evaporimeter in this first cavity.
6. compound high pressure air cooling dehumidification system according to claim 4, wherein this first compressor is an inverter compressor.
7. compound high pressure air cooling dehumidification system according to claim 4, wherein this first compressor is fixed formula compressor frequently.
8. compound high pressure air cooling dehumidification system according to claim 1, it also comprises a preposition dehumidifier, be series at the front end of these frosting devices, and the evaporating temperature of this preposition dehumidifier is greater than 0 degree centigrade, pressure-air carries out dehumidification by condensation by this preposition dehumidifier earlier, and then carries out freeze drying by these frosting devices.
9. compound high pressure air cooling dehumidification system according to claim 8, wherein this preposition dehumidifier comprises one second cavity, one second dehydrating unit and a draining valve, this second dehydrating unit dehumidifies to the pressure-air by this second cavity, and the aqueous water that freeze-outs from this pressure-air is discharged this second cavity via this draining valve.
10. compound high pressure air cooling dehumidification system according to claim 9, wherein this second dehydrating unit comprises one second evaporimeter, one second condenser, one second compressor and an expansion valve, this second evaporimeter, this second condenser, this second compressor and this expansion valve are connected via a refrigerant pipeline, wherein this second evaporimeter and this second condenser are located in this second cavity, pressure-air carries out dehumidification by condensation through this second evaporimeter, and then makes temperature recovery through this second condenser.
11. compound high pressure air cooling dehumidification system according to claim 10, wherein this second compressor is an inverter compressor.
12. compound high pressure air cooling dehumidification system according to claim 10, wherein this second compressor is fixed formula compressor frequently.
13. compound high pressure air cooling dehumidification system according to claim 10, wherein this preposition dehumidifier also comprises a temperature sensing component, is located in this second cavity, and the temperature in this second cavity of sensing is also controlled this dehydrating unit whereby.
14. compound high pressure air cooling dehumidification system according to claim 13, wherein this temperature sensing component is located at the exit of this second evaporimeter.
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| CN200610166988A CN100579632C (en) | 2006-12-13 | 2006-12-13 | Compound high pressure air cooling dehumidification system |
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| CN200610166988A CN100579632C (en) | 2006-12-13 | 2006-12-13 | Compound high pressure air cooling dehumidification system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103316568A (en) * | 2013-06-18 | 2013-09-25 | 东莞理工学院 | Combined type compressed air cryogenic dehumidifier |
| CN103752145A (en) * | 2014-01-17 | 2014-04-30 | 北京正拓气体科技有限公司 | Gas condensing and dewatering system and method |
| CN104819526A (en) * | 2015-05-27 | 2015-08-05 | 青岛大学 | Energy-saving type freeze deep dehumidification air processing device |
| CN104964473A (en) * | 2015-05-27 | 2015-10-07 | 青岛大学 | Energy-efficient refrigeration depth dehumidifying air treatment method |
| CN107875816A (en) * | 2017-11-03 | 2018-04-06 | 广西师范大学 | A kind of method suitable for the dehumidifying of small range space |
| CN110388695A (en) * | 2018-04-20 | 2019-10-29 | 蒋伟义 | Has the dehumidification device of temperature control |
| CN112129022A (en) * | 2019-06-25 | 2020-12-25 | 青岛海尔电冰箱有限公司 | Refrigerator with a door |
| CN112413755A (en) * | 2020-12-14 | 2021-02-26 | 珠海格力电器股份有限公司 | Precooling dehumidification device, method and system and air conditioning equipment |
| CN112999830A (en) * | 2019-12-20 | 2021-06-22 | 美康有限公司 | Dry air supply device and method |
| CN113294895A (en) * | 2021-05-31 | 2021-08-24 | 青岛海信日立空调系统有限公司 | Cloud air conditioner outdoor unit, cloud multi-connected air conditioner outdoor unit and control method thereof |
| CN116020250A (en) * | 2022-12-28 | 2023-04-28 | 广东省九丰氢能科技有限公司 | Hydrogen purification device in hydrolysis hydrogen production process |
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| US20190323761A1 (en) * | 2018-04-24 | 2019-10-24 | Wei-Yi Chiang | Dehumidifying Device with Temperature Control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316568A (en) * | 2013-06-18 | 2013-09-25 | 东莞理工学院 | Combined type compressed air cryogenic dehumidifier |
| CN103752145A (en) * | 2014-01-17 | 2014-04-30 | 北京正拓气体科技有限公司 | Gas condensing and dewatering system and method |
| CN103752145B (en) * | 2014-01-17 | 2014-12-10 | 北京正拓气体科技有限公司 | Gas condensing and dewatering system and method |
| CN104819526A (en) * | 2015-05-27 | 2015-08-05 | 青岛大学 | Energy-saving type freeze deep dehumidification air processing device |
| CN104964473A (en) * | 2015-05-27 | 2015-10-07 | 青岛大学 | Energy-efficient refrigeration depth dehumidifying air treatment method |
| CN104819526B (en) * | 2015-05-27 | 2018-08-17 | 青岛大学 | A kind of energy-saving freezing depth dehumidified air processing unit |
| CN107875816A (en) * | 2017-11-03 | 2018-04-06 | 广西师范大学 | A kind of method suitable for the dehumidifying of small range space |
| CN110388695A (en) * | 2018-04-20 | 2019-10-29 | 蒋伟义 | Has the dehumidification device of temperature control |
| CN112129022A (en) * | 2019-06-25 | 2020-12-25 | 青岛海尔电冰箱有限公司 | Refrigerator with a door |
| CN112129022B (en) * | 2019-06-25 | 2022-09-23 | 青岛海尔电冰箱有限公司 | Refrigerator with a door |
| CN112999830A (en) * | 2019-12-20 | 2021-06-22 | 美康有限公司 | Dry air supply device and method |
| CN112413755A (en) * | 2020-12-14 | 2021-02-26 | 珠海格力电器股份有限公司 | Precooling dehumidification device, method and system and air conditioning equipment |
| CN112413755B (en) * | 2020-12-14 | 2024-05-03 | 珠海格力电器股份有限公司 | Precooling and dehumidifying device, precooling and dehumidifying method, precooling and dehumidifying system and air conditioning equipment |
| CN113294895A (en) * | 2021-05-31 | 2021-08-24 | 青岛海信日立空调系统有限公司 | Cloud air conditioner outdoor unit, cloud multi-connected air conditioner outdoor unit and control method thereof |
| CN116020250A (en) * | 2022-12-28 | 2023-04-28 | 广东省九丰氢能科技有限公司 | Hydrogen purification device in hydrolysis hydrogen production process |
| CN116020250B (en) * | 2022-12-28 | 2023-08-08 | 广东省九丰氢能科技有限公司 | Hydrogen purification device in hydrolysis hydrogen production process |
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