WO2023086067A2 - A passive drying system for dishwashers - Google Patents

A passive drying system for dishwashers Download PDF

Info

Publication number
WO2023086067A2
WO2023086067A2 PCT/TR2022/051287 TR2022051287W WO2023086067A2 WO 2023086067 A2 WO2023086067 A2 WO 2023086067A2 TR 2022051287 W TR2022051287 W TR 2022051287W WO 2023086067 A2 WO2023086067 A2 WO 2023086067A2
Authority
WO
WIPO (PCT)
Prior art keywords
dishwashers
vapor
drying system
mesh structure
specified
Prior art date
Application number
PCT/TR2022/051287
Other languages
French (fr)
Other versions
WO2023086067A3 (en
Inventor
Erdal ÇETKİN
Original Assignee
İzmi̇r Yüksek Teknoloji̇ Ensti̇tüsü Rektörlüğü
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by İzmi̇r Yüksek Teknoloji̇ Ensti̇tüsü Rektörlüğü filed Critical İzmi̇r Yüksek Teknoloji̇ Ensti̇tüsü Rektörlüğü
Publication of WO2023086067A2 publication Critical patent/WO2023086067A2/en
Publication of WO2023086067A3 publication Critical patent/WO2023086067A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/483—Drying arrangements by using condensers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/486—Blower arrangements

Definitions

  • Invention explains a passive drying system which removes the water vapor generated inside dishwashers with no additional energy requirement.
  • AU2009276043A1 patent described air channels to enable homogeneous flow of air with vapor to ta absorption device.
  • the described channels do not exist in the current invention.
  • JP2009100973A patent describes an active methodology to enable vapor to condensate via decreased pressure inside dishwashers. Unlike this patent using pressure variation via an active approach, the invention focuses on surface area increment to enable condensation via a passive approach.
  • US2009266385A1 patent described an expansion volume and a surface enabling condensation connected to this volume inside dishwashers.
  • the surface enabling condensation is limited at a specific location located at the side of the device.
  • An additional area is defined for condensation.
  • the invention does not include a similar area defined in the patent.
  • WO201 8069019A1 patent describes a dishwasher design enabling drying via phase change materials.
  • the phase change materials are not being included in the current invention.
  • CN101164491A patent includes a condensation device to condensate vapor generated inside the dishwasher.
  • the invention does not include condensation device.
  • US2015068056A1 patent defines an approach to discharge the vapor generated inside the dishwasher to to out of it. This patent does not include surface area increment approach as described in the invention.
  • KR20170126383 patent explains a drying volume located at the rear of dishwasher. This design includes a heat exchanger unlike the surface area increment approach of the invention.
  • CN108852241 describes a dishwasher air discharge system. The mentioned system is not included in the invention.
  • EP2168470 patent defines industrial type dishwasher drying system.
  • the surface area increment of the invention is not included in this patent document.
  • dishwasher drying systems include heat exchangers, circulation channels for drying and additional volumes; furthermore, additional energy consumption is required. Furthermore, in order to have effective drying both energy consumption is increased and rinse aid use is recommended to eliminate water spots. However, this yields more energy consumption and chemical concentrations staying on the dishes. In conclusion, a passive drying system for dishwashers is required which elimates the disadvantages and improve the current technique.
  • Invention is a passive drying system for dishwashers which exceeds the current state of art, eliminates disadvantages and includes additional advantages.
  • the described invention defines a methodology for condensing vapor inside the dishwashers without additional energy consumption on a porous surface which inserted in dishwashers and how vapor would be transferred to this surface with the required designs. Therefore, it is expected that both energy and rinse aid consumption to decrease greatly.
  • the aim of invention is to document a passive drying system with no additional energy consumption which removes the vapor inside a dishwasher via the surface are increment in great orders.
  • Figure - 1A Cut view of a dishwasher with the passive drying system of the invention.
  • Figure - 1 B Front view of mesh structure used in the passive drying system of the invention.
  • FIG 1A shows the cut view of a dishwasher (0) with the passive drying system of the invention.
  • Dishwasher (0) includes the internal volume of dishwasher (1 ) and condensation volume (2).
  • Internal volume of dishwasher (1 ) is where the dishes are cleaned.
  • Condensation volume (2) is where the vapor is condensed and removed from the system.
  • vapor circulation ise created in between the internal volume of dishwasher (1 ) and condensation volume (2), and this circulation which takes awhile yields the vapor to condensate in the condensation volume (2) and removed as liquid water.
  • vapor and air mixture inside the internal volume of dishwasher (1 ) enters to the condensation volume (2) via vapor entrance connection (12); then, the mixture enters from the condensation volume (2) to the internal volume of dishwasher (1 ) via vapor exit connection (21 ).
  • the vapor condensates during the circulation phase inside the condensation volume (2) is discharged via water discharge connection (5).
  • vapor is condensed inside the internal volume of dishwasher (1 ) which increases the required time for circulation as well the energy consumption.
  • conventional approach creates water spots on dishes and rinse aid is recommended by manufacturers to eliminate these spots.
  • a mesh structure (3) is inserted into the condensation volume (2) which is separated from the internal volume of dishwasher (1 ).
  • Mesh structure (3) is a component with open cells to enable vapor flow inside of it and made of from metal (such as steel, copper, aluminum or any alloys) wires. Alternatively, it could be a mesh structure manufactured with any kind of metal foam production approach with open cells.
  • the surface area in contact with the vapor is enhanced greatly due to the form of the mesh structure (3). Water vapor contacts with the wires/open cells in the mesh structure (3) and condensation time decreases due to enhanced surface area and droplets to separate from the condensation surface easily (structure characteristics in comparison to smooth surfaces). Energy consumption during the drying process decreases as the condensation time decreases.
  • the surface area may become 300 cm 2 .
  • FIG. 1 B and 1 C shows the front view and bottom view of the mesh structure (3).
  • Mesh structure could be made of steel, copper, aluminium or any alloys of these metals as well as other materials such as thermoplastics, plastics etc.
  • the essential part of the invention is enabling vapor to flow along a mesh structure (3) made of any kind of material to decrease condensation time and efficiency.
  • the figure of invention shows that the mesh structure (3) is placed with an inclination angle inside the condensation volume (2), to maximize the contact between vapor which enters from the vapor entrance connection (12) and mesh structure (3) pores.
  • both vapor entrance connection (12) and vapor exit connection (21 ) may have a mechanism to enable them to be opened and closed based on specific times.
  • a fan may be inserted into the condensation volume, for instance, to the vapor exit connection (21 ) but not limited to, in order to help the circulation of vapor.
  • the time of when fan works and stops may also be controlled. For instance, the fan may work when the buoyancy forces decreases due to decreased temperature gradient as the dishes cool down, i.e. when natural convection circulation becomes weak to support flow.

Abstract

The described invention defines a methodology for condensing vapor inside the dishwashers without additional energy consumption on a porous surface which inserted in dishwashers and how vapor would be transferred to this surface with the required designs.

Description

A PASSIVE DRYING SYSTEM FOR DISHWASHERS
Technical Field:
Invention explains a passive drying system which removes the water vapor generated inside dishwashers with no additional energy requirement.
Background Technique:
Dishwashers cleans the dishes by increasing the water temperature circulating inside of it with the aid of a cleaning agent. The temperature of the dishes inside the dishwasher increases due to elevated temperature of circulated water. The humidity level inside the dishwasher is also high due to this reason. Water vapor inside dishwashers begins to condensate as the dishes inside cool down. The condensation of water vapor with the decrease of temperature is a physical phenomenon.
It is generally recommended by dishwasher manufacturers to use rinse aid to decrease the surface tension for liquid droplets condensating on the dishes to eliminate water spots. In order to eliminate water spots, some companies increases the water temperature during rinse to really high values to store heat in dishes and using components with lower thermal capacitance inside the dishwasher to enable condensation on these components rather than dishes. This increases the energy consumption greatly as the water temperature is required to be increased to unnecessary high values to clean dishes. Some dishwashers automatically open their door panels to discharge water vapor from the dishwasher to the ambient (generally kitchen) to decrease the vapor inside the dishwasher. However, this increases the humidity of the ambient greatly for a short timespan which yields condensation on devices and walls to trigger mold growth in where the dishwasher located. Some dishwashers use refrigeration cycle to condensate water vapor inside the dishwashers. This solution both increases the number of equipment needed for the dishwasher as well as energy consumption. Some devices include electrical heaters to decrease relative humidity for the air taken from ambient, this solution also requires additional energy consumption. Another approach is absoption of water vapor inside to dishwasher and supply dry air into it. Even though absoption occurs via chemical reactions, the absorbed vapor should be discharged to ambient with additional heaters to enable reuse which requires additional energy consumption.
European Union energy classes had been updated to eliminate A+, A++, etc classes, and new segmentation varies in between A and G. the most energy efficient dishwasher is in B class based on the new classification. Therefore, the minimization of energy consumption in the most energy consuming cycles (washing and drying cycles) is essential. Washing cycle cannot be altered significantly because it is optimized to clean dishes; therefore, minimization of energy consumption during drying cycle becomes essential.
AU2009276043A1 patent described air channels to enable homogeneous flow of air with vapor to ta absorption device. The described channels do not exist in the current invention.
JP2009100973A patent describes an active methodology to enable vapor to condensate via decreased pressure inside dishwashers. Unlike this patent using pressure variation via an active approach, the invention focuses on surface area increment to enable condensation via a passive approach.
US2017319045A1 patent focuses on the condensation of vapor via heat being stored in a phase change material. The phase change materials are not being included in the current invention.
US2009266385A1 patent described an expansion volume and a surface enabling condensation connected to this volume inside dishwashers. The surface enabling condensation is limited at a specific location located at the side of the device. An additional area is defined for condensation. The invention does not include a similar area defined in the patent.
WO201 8069019A1 patent describes a dishwasher design enabling drying via phase change materials. The phase change materials are not being included in the current invention.
CN101164491A patent includes a condensation device to condensate vapor generated inside the dishwasher. The invention does not include condensation device.
US2015068056A1 patent defines an approach to discharge the vapor generated inside the dishwasher to to out of it. This patent does not include surface area increment approach as described in the invention.
KR20170126383 patent explains a drying volume located at the rear of dishwasher. This design includes a heat exchanger unlike the surface area increment approach of the invention.
CN108852241 describes a dishwasher air discharge system. The mentioned system is not included in the invention.
EP2168470 patent, defines industrial type dishwasher drying system. The surface area increment of the invention is not included in this patent document.
The current technical solutions of dishwasher drying systems include heat exchangers, circulation channels for drying and additional volumes; furthermore, additional energy consumption is required. Furthermore, in order to have effective drying both energy consumption is increased and rinse aid use is recommended to eliminate water spots. However, this yields more energy consumption and chemical concentrations staying on the dishes. In conclusion, a passive drying system for dishwashers is required which elimates the disadvantages and improve the current technique.
Explanation of Invention:
Invention is a passive drying system for dishwashers which exceeds the current state of art, eliminates disadvantages and includes additional advantages.
The described invention defines a methodology for condensing vapor inside the dishwashers without additional energy consumption on a porous surface which inserted in dishwashers and how vapor would be transferred to this surface with the required designs. Therefore, it is expected that both energy and rinse aid consumption to decrease greatly.
The aim of invention is to document a passive drying system with no additional energy consumption which removes the vapor inside a dishwasher via the surface are increment in great orders.
Description of the Drawings:
The invention is explained by citing the attached figures to make it easier to understand the specifications of it. However, the aim is not to limit the invention with the specifications. On the contarary, it is aimed to include all alternatives, variations and equalalities defined by the attached claims. It should be understood that the figures are presented to make it easier for the characteristics of invention and methodologies to be understood as well as the methodological specifications of the invention.
These Figures;
Figure - 1A Cut view of a dishwasher with the passive drying system of the invention. Figure - 1 B Front view of mesh structure used in the passive drying system of the invention.
Figure - 1 C Bottom view of mesh structure used in the passive drying system of the invention.
The attached figures which helps the invention to be understood is numbered as mentioned, and the labels of them are given below.
The Labels in the Figures:
0. Dishwasher
1. Internal volume of dishwasher
2. Condensation volume
3. Mesh structure
4. Separation wall
5. Water discharge connection
12. Vapor entrance connection
21. Vapor exit connection
32. Mesh structure bottom holes
Description of Invention:
The detailed explanation of the invention which is a dishwasher (0) drying system is explained with examples to make the subject easily understood without any restriction created. Description explains a passive drying system which removes the water vapor generated inside dishwashers (0) with no additional energy requirement.
Figure 1A shows the cut view of a dishwasher (0) with the passive drying system of the invention. Dishwasher (0) includes the internal volume of dishwasher (1 ) and condensation volume (2). Internal volume of dishwasher (1 ) is where the dishes are cleaned. Condensation volume (2) is where the vapor is condensed and removed from the system. In the invention, vapor circulation ise created in between the internal volume of dishwasher (1 ) and condensation volume (2), and this circulation which takes awhile yields the vapor to condensate in the condensation volume (2) and removed as liquid water. During the circulation phase, vapor and air mixture inside the internal volume of dishwasher (1 ) enters to the condensation volume (2) via vapor entrance connection (12); then, the mixture enters from the condensation volume (2) to the internal volume of dishwasher (1 ) via vapor exit connection (21 ). The vapor condensates during the circulation phase inside the condensation volume (2) is discharged via water discharge connection (5). In conventional approach, vapor is condensed inside the internal volume of dishwasher (1 ) which increases the required time for circulation as well the energy consumption. In additional, conventional approach creates water spots on dishes and rinse aid is recommended by manufacturers to eliminate these spots.
In the invention, in order to eliminate such problems related with the conventional approach, a mesh structure (3) is inserted into the condensation volume (2) which is separated from the internal volume of dishwasher (1 ). Mesh structure (3) is a component with open cells to enable vapor flow inside of it and made of from metal (such as steel, copper, aluminum or any alloys) wires. Alternatively, it could be a mesh structure manufactured with any kind of metal foam production approach with open cells. The surface area in contact with the vapor is enhanced greatly due to the form of the mesh structure (3). Water vapor contacts with the wires/open cells in the mesh structure (3) and condensation time decreases due to enhanced surface area and droplets to separate from the condensation surface easily (structure characteristics in comparison to smooth surfaces). Energy consumption during the drying process decreases as the condensation time decreases. Furthermore, this also minimizes the water spots on dishes and the necessity of rinse aid diminishes or at least amount of it could be decreased. For a mesh structure of 1cm3 volume and 0.85 porosity which consists of metal wires in 1 mm diameter, the surface area may become 300 cm2.
Figure imgf000009_0001
(Reference: doi.org/10.1155/2020/2478579)
Above a formula is given to calculate the surface area with its reference document. In this document the given values are based on copper wires and pore structure and wire material affects the surface area calculation. However, if smooth plates are inserted into the same volume discussed for the mesh structure (3), the surface area decreased at least to 1/15th relative to the mesh structure (3). Therefore, the increment of surface area via mesh structure is evident.
Figures 1 B and 1 C shows the front view and bottom view of the mesh structure (3). According to these Figures, there are mesh structure bottom holes (32) located at the bottom surface of the mesh structure (3) to enable condensed water to be discharged via water discharge connection (5). Mesh structure could be made of steel, copper, aluminium or any alloys of these metals as well as other materials such as thermoplastics, plastics etc. The essential part of the invention is enabling vapor to flow along a mesh structure (3) made of any kind of material to decrease condensation time and efficiency. The figure of invention shows that the mesh structure (3) is placed with an inclination angle inside the condensation volume (2), to maximize the contact between vapor which enters from the vapor entrance connection (12) and mesh structure (3) pores.
In the invention both vapor entrance connection (12) and vapor exit connection (21 ) may have a mechanism to enable them to be opened and closed based on specific times. Furthermore, a fan may be inserted into the condensation volume, for instance, to the vapor exit connection (21 ) but not limited to, in order to help the circulation of vapor. The time of when fan works and stops may also be controlled. For instance, the fan may work when the buoyancy forces decreases due to decreased temperature gradient as the dishes cool down, i.e. when natural convection circulation becomes weak to support flow.

Claims

CLAIMS - The invention is a passive drying system which removes the water vapor generated inside dishwashers (0) with no additional energy requirement and it is specified with; including at least one mesh structure (3) made of from wires in the form of open cell mesh to enhance the contact surface area of vapor which is located inside a separate condensation volume (2) or internal volume of dishwasher (1 ). - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; mesh structure (3) wires is made of from aluminium. - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; mesh structure (3) wires is made of from copper. - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; mesh structure (3) wires is made of from steel or stell allyos. - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; mesh structure (3) wires is made of from plastic. - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; mesh structure (3) is located inside the condensation volume (2) with an inclination angle to enhance contact of vapor with mesh structure (3). - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; vapor entrance connection (12) and/or vapor exit connection (21 ) may have a mechanism to enable them to be opened and closed based on specific times. - The invention is a passive drying system for dishwashers based on Claim 1 , and it is specified with; an inserted fan into the condensation volume, such as to the vapor exit connection (21 ) but not limited to, in order to help the circulation of vapor.
9
PCT/TR2022/051287 2021-11-13 2022-11-12 A passive drying system for dishwashers WO2023086067A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2021017707 2021-11-13
TR2021/017707 2021-11-13

Publications (2)

Publication Number Publication Date
WO2023086067A2 true WO2023086067A2 (en) 2023-05-19
WO2023086067A3 WO2023086067A3 (en) 2023-06-15

Family

ID=86337351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2022/051287 WO2023086067A2 (en) 2021-11-13 2022-11-12 A passive drying system for dishwashers

Country Status (1)

Country Link
WO (1) WO2023086067A2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008040789A1 (en) * 2008-07-28 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with sorption drying device
DE102015107856B4 (en) * 2015-05-19 2020-11-12 Mafac Ernst Schwarz Gmbh & Co. Kg Dehumidifying device and dehumidifying method
US9907451B2 (en) * 2016-05-09 2018-03-06 Samsung Electronics Co., Ltd. Dishwasher drying system with thermal storage heat exchanger

Also Published As

Publication number Publication date
WO2023086067A3 (en) 2023-06-15

Similar Documents

Publication Publication Date Title
US9907451B2 (en) Dishwasher drying system with thermal storage heat exchanger
CN103298390B (en) Home appliances
US8307839B2 (en) Dishwasher with a latent heat accumulator
CN104921680B (en) Household electrical appliance with drying equipment
KR102327894B1 (en) Defrosting device and refrigerator having the same
US8603260B2 (en) Dishwasher comprising a heat tube
US3658075A (en) Dishwasher having improved condensation means
CN107149452B (en) Dish washer with drying system
CN101862171A (en) Dish-washing machine
BR112014014334B1 (en) washing machine dishes
JP7432596B2 (en) Enclosure to provide liquid film cooling
TW201139777A (en) Drying machine and washing machine comprising a drying machine
CN106256942A (en) Baker and manufacture method thereof
US20060096621A1 (en) Dishwasher having a drying apparatus
WO2023086067A2 (en) A passive drying system for dishwashers
US11134827B2 (en) Dishwasher
JP4967923B2 (en) Drain water treatment equipment
KR102101030B1 (en) Air conditioner using thermoelement module
CN2933271Y (en) Tableware washing machine with drying device
JP6577779B2 (en) washing machine
CN112797512B (en) Water collecting assembly, water receiving structure and dehumidifier
KR101333622B1 (en) Condenser
US11284774B2 (en) Dishwasher with heat pump
JP2008136639A (en) Dishwasher and drier
KR102658399B1 (en) Dishwasher with heat pump