GB2375811A - A dryer for textiles, utilising low pressure and microwave heating - Google Patents
A dryer for textiles, utilising low pressure and microwave heating Download PDFInfo
- Publication number
- GB2375811A GB2375811A GB0112655A GB0112655A GB2375811A GB 2375811 A GB2375811 A GB 2375811A GB 0112655 A GB0112655 A GB 0112655A GB 0112655 A GB0112655 A GB 0112655A GB 2375811 A GB2375811 A GB 2375811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dryer
- microwave heating
- low pressure
- clothes
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 title abstract description 5
- 239000004753 textile Substances 0.000 title description 2
- 238000001035 drying Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A clothes dryer operates at very low pressure (1/10th of an atmosphere) and with microwave heating. The microwaves have a frequency of 2.45 GHz creating a temperature of about 45 deg.C. By monitoring the temperature and pressure within the clothes dryer the power to the magnetron can be controlled (ie when the amount of water vapour being given off gets low, less microwave power is applied because the clothes are nearly dry).
Description
<Desc/Clms Page number 1>
Patent Application/Specification
A DRYER FOR TEXTILES, UTILISING HIGH VACUUM AND
MICROWAVE HEATING [Technical field] This invention relates to a clothes dryer utilising high vacuum and microwave heating.
[Background] Indoor clothes drying is commonly achieved by devices known as"tumble dryers".
These circulate warmed dry air through the wet clothes by means of forced air convection. The warmed air has a capacity to absorb moisture from the clothes and this moisture is expelled in the exhaust gasses. A large proportion of the heat supplied is used to heat the air, and a smaller proportion is used to provide the latent heat of evaporation needed to change the water from its liquid phase to the vapour phase.
Tumble dryers are therefore inherently thermally inefficient, although heat exchangers may be employed to improve the thermal efficiency.
[Essential technical features According to the present invention, the device outlined here operates on fundamentally different principles.
It employs both a high vacuum and microwave energy (approximately 2.45GHz).
Applying a high vacuum to wet clothes will cause liquid water to vaporise enabling it to be pumped away thereby leaving the clothes dryer. However, the evaporation process will cool the clothes and as the temperature decreases, less water vapour will be able to be removed. To compensate for this temperature drop, microwave energy is transmitted into the enclosing vacuum chamber, and the microwave power can be controlled to maintain the temperature of the clothes at the desired level.
The component parts consist of :-
* An enclosing vacuum chamber (having access for the placement and removal of clothes).
* A high *1 vacuum pump * One or more microwave radiation sources, similar to that used in a domestic (650 Watt) microwave oven. These have a frequency of 2.45 giga Hz, which excites and heats water molecules by dielectric heating. This form of electromagnetic radiation can be transmitted through a vacuum.
* A temperature measurement device, for control purposes.
* A pressure measurement device, for control purposes.
* 1 In this context, a high is expected to be about 1/10 of an atmosphere. Figure 1 shows a part of the vapour pressure vs. temperature curve for water, and it can be seen that at 1/101Ì1 of an atmosphere water boils at about 45 C. A pressure of about'/joh of an atmosphere and a temperature of about 45 C are the anticipated operating parameters for the process.
<Desc/Clms Page number 2>
By monitoring the temperature and pressure within the system the power to the I magnetron can be controlled (i. e. when the amount of water vapour being given off gets low, less microwave power should be applied because the clothes are nearly dry).
[Example] A specific example of the invention will now be described by way of an example with
reference to the accompanying drawing in which :tn Figure 1 illustrates the layout of the component parts.
Claims (2)
1 A clothed drying apparatus comprising a vacuum chamber with one or more magnetron microwave sources and a vacuum pump.
2 An apparatus as claimed in Claim 1 wherein a control system is incorporated in order to control the amount of microwave power applied to achieve an optimum drying rate- 3 An apparatus as claimed in Claim 1 or Claim 2, wherein a control system is incorporated in order to measure the temperature and pressure conditions which relate to the completion of the drying process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0112655A GB2375811A (en) | 2001-05-24 | 2001-05-24 | A dryer for textiles, utilising low pressure and microwave heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0112655A GB2375811A (en) | 2001-05-24 | 2001-05-24 | A dryer for textiles, utilising low pressure and microwave heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0112655D0 GB0112655D0 (en) | 2001-07-18 |
| GB2375811A true GB2375811A (en) | 2002-11-27 |
Family
ID=9915215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0112655A Withdrawn GB2375811A (en) | 2001-05-24 | 2001-05-24 | A dryer for textiles, utilising low pressure and microwave heating |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2375811A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182505B (en) * | 2021-12-29 | 2024-03-19 | 木卫智能科技(深圳)有限公司 | Laundry treating apparatus and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057907A (en) * | 1974-07-18 | 1977-11-15 | Rapino Norman G | Method and apparatus for drying clothes |
| CA1092198A (en) * | 1977-04-04 | 1980-12-23 | James A. Toyne | Microwave clothes drier with a vented conical baffle |
| US4250628A (en) * | 1979-06-21 | 1981-02-17 | Smith Richard D | Microwave fabric dryer method and apparatus |
| US4856203A (en) * | 1988-01-15 | 1989-08-15 | The Fitzpatrick Company | Microwave vacuum dryer |
| US4882851A (en) * | 1987-04-13 | 1989-11-28 | The Fitzpatrick Co. | Apparatus and method for batch drying using a microwave vacuum system |
| EP0639748A1 (en) * | 1993-08-20 | 1995-02-22 | Bosch-Siemens Hausgeräte GmbH | Device for carrying out a drying process |
| JPH07208862A (en) * | 1994-01-19 | 1995-08-11 | Shigeki Nakagawa | Vacuum electromagnetic heating type dryer |
| US5859412A (en) * | 1996-03-28 | 1999-01-12 | Yagi; Shunichi | Microwave and far infrared drying under reduced pressure |
-
2001
- 2001-05-24 GB GB0112655A patent/GB2375811A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057907A (en) * | 1974-07-18 | 1977-11-15 | Rapino Norman G | Method and apparatus for drying clothes |
| CA1092198A (en) * | 1977-04-04 | 1980-12-23 | James A. Toyne | Microwave clothes drier with a vented conical baffle |
| US4250628A (en) * | 1979-06-21 | 1981-02-17 | Smith Richard D | Microwave fabric dryer method and apparatus |
| US4882851A (en) * | 1987-04-13 | 1989-11-28 | The Fitzpatrick Co. | Apparatus and method for batch drying using a microwave vacuum system |
| US4856203A (en) * | 1988-01-15 | 1989-08-15 | The Fitzpatrick Company | Microwave vacuum dryer |
| EP0639748A1 (en) * | 1993-08-20 | 1995-02-22 | Bosch-Siemens Hausgeräte GmbH | Device for carrying out a drying process |
| JPH07208862A (en) * | 1994-01-19 | 1995-08-11 | Shigeki Nakagawa | Vacuum electromagnetic heating type dryer |
| US5859412A (en) * | 1996-03-28 | 1999-01-12 | Yagi; Shunichi | Microwave and far infrared drying under reduced pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0112655D0 (en) | 2001-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4250628A (en) | Microwave fabric dryer method and apparatus | |
| JP3796406B2 (en) | Cooking device with energy storage and energy extraction device | |
| US20140325865A1 (en) | Dielectric dryer drum | |
| US9803313B2 (en) | Clothes treating apparatus | |
| JPH08178522A (en) | Dryer | |
| US3845270A (en) | Microwave heating and vapor condensing apparatus | |
| US3048928A (en) | Freeze-drying apparatus | |
| CN110158290A (en) | Laundry machine with hf drying device | |
| NZ502038A (en) | Microwave drying plant, heated and dehumidified air passed through microwave drying chamber | |
| KR101726322B1 (en) | A heat pump dryer using waste heat of a microwave dryer and a drying method using the same | |
| KR101658217B1 (en) | Heat recovery type multi-drying system using micro wave and hot air | |
| US3883958A (en) | Method and apparatus for accelerated freeze drying | |
| GB2375811A (en) | A dryer for textiles, utilising low pressure and microwave heating | |
| Durance et al. | Microwave drying of pharmaceuticals | |
| US20220074121A1 (en) | Laundry drying machine and controlling method of laundry drying machine | |
| US3903611A (en) | Drying equipment | |
| KR101381196B1 (en) | Control system of dryer using of heat pump high frequence with vacuum | |
| CN106871579A (en) | A kind of heat pump vacuum couplings Far-infrared drying device | |
| KR20130125453A (en) | Dryer using of heat pump high frequence with vacuum | |
| Resch | Drying of incense cedar pencil slats by microwave power | |
| CN211897499U (en) | Drying machine | |
| CN110160337A (en) | Microwave drier | |
| SU1633042A1 (en) | Linen drying machine | |
| JPH11235720A (en) | Method for drying polytetrafluoroethylene powder | |
| WO1982002761A1 (en) | Microwave fabric dryer method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |