CN1165216A - Vacuum drying method for clothes and its device - Google Patents
Vacuum drying method for clothes and its device Download PDFInfo
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- CN1165216A CN1165216A CN 96111564 CN96111564A CN1165216A CN 1165216 A CN1165216 A CN 1165216A CN 96111564 CN96111564 CN 96111564 CN 96111564 A CN96111564 A CN 96111564A CN 1165216 A CN1165216 A CN 1165216A
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Abstract
A vacuum dewetting method for clothes features that wet clothes are put in a sealed box which can be vacuumized; when said box is vacuumizing the vaporization of water in clother is accelerated; and when the pressure of gas in box is reduced to a value corresponding to saturated vapour pressure value of wet clothes' humidity, the water in clothes is quickly vaporized, resulting in quickly dewatering the clothes. Its advantages include low energy consumption, short dewetting period and no damage to fibre of clothes.
Description
The invention belongs to vacuumize and refrigeration technology field, particularly vacuum drying method for clothes and device thereof.
Existing clothes drying method mainly is an electrical heating method, and its form has following several: first kind is to utilize thermal source directly to contact with clothes, dries by the heat conduction, as electric iron.Its shortcoming is that contact area is little, and it is inhomogeneous to dry, and power consumption is big, and is dangerous, and the difficult control of temperature causes clothes impaired easily.Second kind is that high temperature dries, and clothes place in the high temperature casing and dry, as drying baker.Its shortcoming is that power consumption is big, and at high temperature, the clothes fiber is cracked from dryness easily, fractureed, and clothes are shortened service life.The third is that the heated dry air convection current is dried, as I the invention patent " the automatic air-dry apparatus of family expenses " (92206122.X).The drum-type suit dried machine of selling on the market also is to utilize the heated dry air convection current to dry.Its concrete operation principle is that clothes are placed in the rotating cylinder, clothes overturn with rotating cylinder, air is after the heater heating at air inlet place, again through the swabbing action of air draft impeller, constantly enter in the cylinder of rotation, contact with clothes, the air after the moisture absorption is constantly discharged outside the machine again, circulation is so constantly carried out, and clothes are dried.The shortcoming of this mode of drying is owing to be subjected to the restriction of the volume of casing or cylinder and the principle of drying, and it is relatively poor that cotton wool and thick clothes are dried, and power consumption is big, and cylindrical drier also can cause clothes fold.The 4th kind is that constant temperature steam dries.Clothes are placed constant temperature steam, utilize steam that the moisture content in the clothes is heated, make its vaporization, its shortcoming is that power consumption is big, and the clothes fiber is impaired easily.
It is big to the objective of the invention is to solve the clothes long-term power consumption that relies on electrical heating elements and exist of drying, dangerous, clothes are easily impaired, the problem of the time length of drying, invented vacuum drying method for clothes and device, with this method clothes being dried has the time of drying weak point, and it is low to consume energy, safe in utilization, to the harmless characteristics of clothes fiber.
People are by long-term experimental study and analytical calculation, and with the pressure of water vapour, state parameters such as temperature are tabulating, so that calculate research, following is the part water vapour table that experiment draws.Form one: form two:
| t℃ | ?p s?bar | t℃ | ?P s?bar | ?P?bar | ??t s℃ | ?P?bar | ?t s℃ | ?P?bar | t s℃ | |
| ?0 ?0.01 ?1 ?2 ?4 ?6 ?8 ?10 ?12 ?14 ?16 ?18 ?20 ?22 ?24 ?26 | ?0.006108 ?0.006112 ?0.006566 ?0.007054 ?0.008129 ?0.009346 ?0.010721 ?0.012271 ?0.014015 ?0.015974 ?0.018170 ?0.020626 ?0.023368 ?0.026424 ?0.029824 ?0.033600 | ?28 ?30 ?35 ?40 ?45 ?50 ?55 ?60 ?65 ?70 ?75 ?80 ?85 ?90 ?95 ?100 | ?0.037785 ?0.042417 ?0.056217 ?0.073749 ?0.095817 ?0.12335 ?0.15740 ?0.19919 ?0.25008 ?0.31161 ?0.38548 ?0.47359 ?0.57803 ?0.70108 ?0.84525 ?1.01325 | ?0.010 ?0.015 ?0.020 ?0.025 ?0.030 ?0.035 ?0.040 ?0.045 ?0.050 ?0.055 ?0.060 ?0.065 ?0.070 ?0.075 ?0.080 ?0.085 | ?6.982 ?13.034 ?17.511 ?21.094 ?24.098 ?26.692 ?28.981 ?31.034 ?32.90 ?34.60 ?36.18 ?37.65 ?39.02 ?40.32 ?41.53 ?42.69 | ?0.090 ?0.095 ?0.100 ?0.11 ?0.12 ?0.13 ?0.14 ?0.15 ?0.16 ?0.17 ?0.18 ?0.19 ?0.20 ?0.21 ?0.22 ?0.23 | ?43.79 ?44.83 ?45.83 ?47.71 ?49.45 ?51.06 ?52.58 ?54.00 ?55.34 ?56.62 ?57.83 ?58.98 ?60.09 ?61.15 ?62.16 ?63.14 | ?0.24 ?0.25 ?0.26 ?0.27 ?0.28 ?0.29 ?0.30 ?0.40 ?0.50 ?0.60 ?0.70 ?0.80 ?0.90 ?1.00 | ?64.08 ?64.99 ?65.87 ?66.72 ?67.55 ?68.35 ?69.12 ?75.89 ?81.35 ?85.95 ?89.96 ?93.51 ?96.71 ?99.63 |
Form one is to arrange by temperature, our very clear saturation temperature t and corresponding saturated vapour pressure P of this temperature of drawing from form
s, along with saturation temperature reduces, saturated vapour pressure p
sAlso reduce.
Form two is that pressing force is arranged, our also very clear saturated vapour pressure p and corresponding saturation temperature ts of this pressure of drawing from form.Along with saturated vapour pressure p reduces, saturation temperature ts also reduces.
The method of clothes vacuum drying is: the clothes that dry are placed in the evacuated airtight casing of energy, by vavuum pump the gas in the casing is extracted out, along with the gas pressure in the casing descends, moisture content vaporization in the clothes is accelerated, when the gas pressure in the casing drops to the pairing saturated vapour pressure value of wet clothes temperature, moisture content in the clothes is acutely vaporized, and clothes dry fast.
Be the experiment of clothes being carried out at low place above sea level of drying below.
Experiment one: wet clothes are placed in the casing, have exhaust outlet to communicate on the casing, utilize electrical heating elements that casing is heated with the external world.Along with the temperature in the casing raises, the moisture content vaporization in the clothes is accelerated, and when the temperature in the casing reached 100 ℃, the moisture content in the clothes was acutely vaporized.
Experiment two: wet clothes are placed in the airtight casing that can vacuumize, by vavuum pump the gas in the casing is extracted out, when bleeding, casing is heated, make the temperature in the casing be elevated to 40 ℃, when the pressure in the casing dropped to 0.0738bar, the moisture content in the clothes was acutely vaporized.
Experiment three: wet clothes are placed in the airtight casing, by vavuum pump, the gas in the casing is extracted out, detecting ambient temperature is 0 ℃.When the gas pressure in the casing drops to 0.006108bar, do not need the casing heating, the moisture content in the clothes is acutely vaporized.
Casing experiment above the vacuum technique theory reaches learns that the major influence factors of clothes vacuum drying has two kinds, the one, and the influence of gas pressure in the casing, gas pressure is low, and it is fast to dry, and the gas pressure height dries slowly.The 2nd, Temperature Influence, ambient temperature is low, and it is slow to dry, the ambient temperature height, it is fast to dry, artificially outside or inner heating to casing, it is fast to dry.
This method is compared with existing electrical heating method, has the following advantages:
1, this method does not need thermal source, but also can from environment, absorb energy (if casing does not have heat insulation layer, clothes are in the process of drying, moisture content in the clothes absorbs the heat in the casing in vaporescence, make the temperature in the casing be lower than the outer environment temperature of casing, the heat that absorbed in vaporescence of moisture content in the clothes can be partly obtains from environment transmits the energy of casing like this) so power consumption is low, safe in utilization.
2, this method is dried to clothes at normal temperatures, so the clothes fiber can be not impaired.
3, this method adopts vacuum drying, and the moisture content in the clothes is acutely vaporization at normal temperatures, and the time is short so clothes dry.
Optimal clothes vacuum drying device should be that the vacuum drying casing directly is connected with roughing pump, the water vapour of extracting out, at roughing pump exit regelation Cheng Shui, collecting the back discharges, but at present owing to be subjected to the restriction of vacuum pump technology, can directly the draw water single-stage of steam, inexpensive roughing pump is still waiting further exploitation.
Be the clothes vacuum drying device that utilizes the existing equipment combination below, this device has the effect of drying preferably.
Fig. 1 is a clothes vacuum drying device schematic diagram.
Fig. 2 is clothes vacuum drying device circuit figure.
This device mainly is made up of vacuum system and cryogenic refrigerating system, vacuum system is by the airtight casing (3) that dries, and condenser (7) is with gas ballasting rotary-vane vaccum pump (13), electric contact formula pressure vacuum gauge (15), manual vacuum valve (8), electromagnetism venting vacuum valve (11), air cleaner (10), bellows (12), casing heat insulation layer (5), condenser heat insulation layer (9), compositions such as pipeline.Cryogenic refrigerating system adopts the domestic refrigerator refrigeration system, by refrigeration compressor (16), refrigeration system condenser (2), device for drying and filtering (17), heating power expansion valve (14), (adopt capillary in the domestic refrigerator refrigeration system, this device adopts heating power expansion valve, its principle is that the gaseous refrigerant degree of superheat from evaporator outlet is that signal is automatic, and the aperture of variable expansion valve enters the flow of evaporimeter with the control liquid refrigerant exactly.Make liquid refrigerant throttling step-down, cooling simultaneously, realize dry-pressing to guarantee compressor) refrigeration system evaporator (6), compositions such as pipeline
The process of drying of this device is as follows:
After wet clothes drying, be suspended on the crossbeam (4), chamber door is fastened, close manual vacuum valve (8), connect K switch D in the accompanying drawing 2, the starting button OA that presses, DZ is an electric contact formula vacuum meter, when the gas pressure in the casing does not reach the vacuum pressure value of setting, the DZ closure, the J1 relay gets the closed self-locking of electric J11 normally open contact like this, J12 normally open contact closure, cryogenic refrigeration compressor D1 starts working, and time relay sj gets electric, in this device, the condenser of refrigeration system (2) is arranged on the bottom and a side of seal case (3), and directly contact with box outer surface, the high-temperature gas cryogen after the refrigerant compression directly transmits heat to casing by tube wall like this, and the energy that the refrigeration system condenser is spread out of utilizes again.Because casing is heated, temperature rises, reduces the vavuum pump vacuum requirements on the other hand.Corresponding shortening of the time of drying.After a period of time, often open timing closing contact SJ1 closure, (purpose of time-delay is to make at first to set up low temperature in the vacuum system condenser, for the vapor condensation of extracting out is prepared) relay J 2, J21 normally open contact closure, electromagnetism venting vacuum valve DJ gets electric, valve closing.J22 normally open contact closure, rotary-vane vaccum pump motor D 2 gets electric, and vavuum pump begins to bleed, the water vapour process condenser (7) of extraction, regelation Cheng Shui, along with the carrying out that bleeds, the gas pressure in the casing reduces gradually.Moisture content vaporization in the clothes is accelerated, when the gas pressure in the casing drops to the pairing saturated vapour pressure value of wet clothes temperature, moisture content in the clothes is acutely vaporized, during violent the vaporization, gas pressure in the casing has certain fluctuation, along with the condensation of most steam, the gas pressure in the casing continues again to reduce.When the gas pressure in the casing was reduced to electric contact formula vacuum meter setting value, the DZ contact disconnected.J1, SJ, J2, the whole dead electricity of DJ circuit breaker, electromagnetism venting vacuum valve is opened, and air enters vacuum system through filter (10), avoids the mechanical pump oil vacuum system of backflowing on the one hand, on the other hand for opening chamber door and draining is prepared.
In clothes dry process, if end to dry, click stop botton TA, complete machine quits work.
In this device, main and the refrigeration system power of electric contact formula vacuum meter setting value, environment temperature, vacuum pump technology parameters etc. are relevant, it simply asks method to be: place wet clothes device to dry, observe vacuum meter, through drying after a while, when fluctuation takes place in the pointer of vacuum meter, moisture content acutely vaporization in casing in the clothes is described, the numerical value of fluctuation prior pointer indication is the vacuum pressure value in the casing, vacuum pressure and atmospheric pressure poor is the gas pressure in the casing, and this gas pressure value can be approximately equal to the wet pairing saturated vapour pressure value of clothes.The casing gas pressure of the casing gas pressure that we set during than fluctuation is low, and the vacuum values of corresponding vacuum meter will be greatly.
Claims (2)
1. a clothes drying method utilizes airtight casing, vavuum pump etc., it is characterized in that wet clothes are placed in the airtight casing, by vavuum pump the gas in the casing is extracted out, and the gas pressure scope in the casing is 0.006108bar-1bar.
2. clothes vacuum drying device that is used for claim 1 method, mainly by the airtight casing (3) that dries, condenser (7), band gas ballasting rotary-vane vaccum pump (13), electric contact formula pressure vacuum gauge (15), manual vacuum valve (8), electromagnetism venting vacuum valve (11), air cleaner (10), bellows (12), casing heat insulation layer (5), condenser heat insulation layer (9), refrigeration compressor (16), refrigeration system condenser (2), device for drying and filtering (17), heating power expansion valve (14), refrigeration system evaporator (6), compositions such as pipeline, it is characterized in that the condenser in the refrigeration system places an airtight bottom half and a side, and directly contact with casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96111564 CN1165216A (en) | 1996-09-25 | 1996-09-25 | Vacuum drying method for clothes and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96111564 CN1165216A (en) | 1996-09-25 | 1996-09-25 | Vacuum drying method for clothes and its device |
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| Publication Number | Publication Date |
|---|---|
| CN1165216A true CN1165216A (en) | 1997-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96111564 Pending CN1165216A (en) | 1996-09-25 | 1996-09-25 | Vacuum drying method for clothes and its device |
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| CN (1) | CN1165216A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968301A (en) * | 2010-10-31 | 2011-02-09 | 冯益安 | Method for drying biomass by using normal temperature |
| CN102011294A (en) * | 2009-09-07 | 2011-04-13 | 海尔集团公司 | Negative pressure type heat pump clothes dryer |
| CN102505435A (en) * | 2011-11-04 | 2012-06-20 | 南京航空航天大学 | Device and method for drying clothes at low temperature through mechanical vapor recompression (MVR) |
| CN103774396A (en) * | 2012-12-19 | 2014-05-07 | 苟仲武 | Heat pump negative pressure efficient drying machine and drying method thereof |
| CN107449189A (en) * | 2017-08-30 | 2017-12-08 | 天津大学 | A kind of quick vacuum cooling unit and cooling means for eliminating evaporator defrosting waste heat |
-
1996
- 1996-09-25 CN CN 96111564 patent/CN1165216A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011294A (en) * | 2009-09-07 | 2011-04-13 | 海尔集团公司 | Negative pressure type heat pump clothes dryer |
| CN102011294B (en) * | 2009-09-07 | 2015-07-29 | 海尔集团公司 | negative pressure type heat pump clothes dryer |
| CN101968301A (en) * | 2010-10-31 | 2011-02-09 | 冯益安 | Method for drying biomass by using normal temperature |
| CN102505435A (en) * | 2011-11-04 | 2012-06-20 | 南京航空航天大学 | Device and method for drying clothes at low temperature through mechanical vapor recompression (MVR) |
| CN102505435B (en) * | 2011-11-04 | 2013-05-15 | 南京航空航天大学 | Device and method for drying clothes at low temperature through mechanical vapor recompression (MVR) |
| CN103774396A (en) * | 2012-12-19 | 2014-05-07 | 苟仲武 | Heat pump negative pressure efficient drying machine and drying method thereof |
| CN107449189A (en) * | 2017-08-30 | 2017-12-08 | 天津大学 | A kind of quick vacuum cooling unit and cooling means for eliminating evaporator defrosting waste heat |
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