EP0329289A1 - Dishwasher - Google Patents
Dishwasher Download PDFInfo
- Publication number
- EP0329289A1 EP0329289A1 EP89300639A EP89300639A EP0329289A1 EP 0329289 A1 EP0329289 A1 EP 0329289A1 EP 89300639 A EP89300639 A EP 89300639A EP 89300639 A EP89300639 A EP 89300639A EP 0329289 A1 EP0329289 A1 EP 0329289A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dishwasher
- tub
- motor
- vent
- pump
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000000344 soap Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 101150114468 TUB1 gene Proteins 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
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
- A47L15/486—Blower arrangements
Definitions
- This invention relates to dishwashers.
- Dishwashers generally employ a drying step after the washing and rinsing steps, wherein after the tub has been drained, the load of the dishwasher is heated by a radiant energy heater.
- the invention provides a dishwasher comprising a pump for wash water, an electric motor for driving the pump, a fan driven by the electric motor for air cooling the motor, and ducting for carrying the cooling air into the tub of the dishwasher when the tub has drained.
- the duct enables the machine to be simplified since there is no longer a need for a radiant energy heater.
- the dishwasher load can be cooled by running the motor after the tub has drained and relying on the air flow and the residual heat of the load after the hot washing operation, to dry the load.
- the fan for the motor is arranged in an open end of the ducting, which preferably comprises two parts connected to allow air escape at the connection: this allows cooling air to be vented when the dishwasher is not in a drying mode.
- the dishwasher comprises of an outer cabinet (not shown) containing a tub 1, the front wall 2 of which is pivotable about its bottom edge 2a to provide a door to give access to the tub.
- the dishes etc forming the load are placed in racks (not shown) in the tub.
- Water is sprayed over the dishes from jets (not shown) driven by a centrifugal pump 3 which is in turn powered by an electric motor 4.
- Ducting consisting of duct 12 and duct 5 conveys cooling air from a fan 6 of the electric motor into the tub.
- the floor of the tub has a sump 7 of plastic material recessed in it, from which the pump 3 derives its input.
- the pump is a centifugal pump and draws water in in direction of the arrow A and delivers it to a shroud 8 of diverging volute cross section which terminates in a vertical outlet section 9 ( Figure 1c), which feeds plastics spray heads (not shown) containing outlet jets.
- a heater 10 is located in the lower part of the sump.
- the electric motor 4 which drives the pump has a cooling fan 6 which draws air from the atmosphere past the motor into the circular duct 12 concentric with the motor.
- a soap dispenser 13 is located in the upper part of the door 2 and has three compartments 13a, 13b, and 13c, which are selectively opened by means of a closure 14 which covers two only of the three compartments at any one time.
- Compartment 13a contains soap powder for a pre-wash
- the compartment 13b contains soap powder for a main wash
- the compartment 13c has a vent at its rear surface which connects via a labryrinth in the dispenser with the atmosphere outside.
- the duct 5 at one end connects into the rear of the tub and at the other end receives an end of the circular duct 12.
- the door 2 is opened and dishes etc forming the load of the machine are inserted into baskets in the tub. Soap is inserted into the soap dispenser, and controls are operated to start the washing operation.
- the machine fills with water and heating element 10 is activated.
- the sector 14 uncovers the pre-wash compartment. When the water temperature is sufficient for the load to be adequately washed, the electric motor is operated and the pump drives hot water to the spray jets.
- the fan on the motor directs the cooling air blast, which cools the motor, from the circular duct 12 into the duct 5, but the compartment 13c containing the vent is closed, and so the air spills out of the duct 12 both where it fits into the duct 5 and at its other, open, end.
- the sector 14 rotates to open the main wash compartment.
- the spray jets dislodge the soap from the compartment 13b as well as spray the load itself.
- the tub When the main wash has been completed, the tub is emptied and re-filled with fresh water, which is heated in order to rinse the load. After the rinse, the tub again drains.
- the heating element can be chosen and fitted with a view only to heating water, and considerations of radiant heating can be ignored: in particular the heating element can be positioned in the sump totally immersed in water (thereby making for greater efficiency) and the sump itself can be of plastics material. Further, the spray head can also be defined by plastics material.
Landscapes
- Washing And Drying Of Tableware (AREA)
Abstract
Description
- This invention relates to dishwashers.
- Dishwashers generally employ a drying step after the washing and rinsing steps, wherein after the tub has been drained, the load of the dishwasher is heated by a radiant energy heater.
- The invention provides a dishwasher comprising a pump for wash water, an electric motor for driving the pump, a fan driven by the electric motor for air cooling the motor, and ducting for carrying the cooling air into the tub of the dishwasher when the tub has drained.
- The duct enables the machine to be simplified since there is no longer a need for a radiant energy heater. The dishwasher load can be cooled by running the motor after the tub has drained and relying on the air flow and the residual heat of the load after the hot washing operation, to dry the load.
- Advantageously, the fan for the motor is arranged in an open end of the ducting, which preferably comprises two parts connected to allow air escape at the connection: this allows cooling air to be vented when the dishwasher is not in a drying mode.
- A dishwasher constructed in accordance with the invention will now be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 is a schematic side view of the dishwasher with its cabinet removed;
- Figure 1a is a section taken through lines a-a of Figure 1 on an enlarged scale;
- Figure 1b is a section taken through lines b-b of Figure 1 on an enlarged scale;
- Figure 1c is a section taken through the lines c-c of Figure 1 on an enlarged scale; and
- Figure 2 is a plan view of the floor of the tub of the dishwasher.
- The dishwasher comprises of an outer cabinet (not shown) containing a tub 1, the front wall 2 of which is pivotable about its
bottom edge 2a to provide a door to give access to the tub. The dishes etc forming the load are placed in racks (not shown) in the tub. Water is sprayed over the dishes from jets (not shown) driven by acentrifugal pump 3 which is in turn powered by anelectric motor 4. - Ducting consisting of
duct 12 andduct 5 conveys cooling air from afan 6 of the electric motor into the tub. - The floor of the tub has a
sump 7 of plastic material recessed in it, from which thepump 3 derives its input. The pump is a centifugal pump and draws water in in direction of the arrow A and delivers it to ashroud 8 of diverging volute cross section which terminates in a vertical outlet section 9 (Figure 1c), which feeds plastics spray heads (not shown) containing outlet jets. Aheater 10 is located in the lower part of the sump. - The
electric motor 4 which drives the pump has acooling fan 6 which draws air from the atmosphere past the motor into thecircular duct 12 concentric with the motor. - A
soap dispenser 13 is located in the upper part of the door 2 and has threecompartments closure 14 which covers two only of the three compartments at any one time.Compartment 13a contains soap powder for a pre-wash, thecompartment 13b contains soap powder for a main wash, and thecompartment 13c has a vent at its rear surface which connects via a labryrinth in the dispenser with the atmosphere outside. - The
duct 5 at one end connects into the rear of the tub and at the other end receives an end of thecircular duct 12. - In operation, the door 2 is opened and dishes etc forming the load of the machine are inserted into baskets in the tub. Soap is inserted into the soap dispenser, and controls are operated to start the washing operation. The machine fills with water and
heating element 10 is activated. Thesector 14 uncovers the pre-wash compartment. When the water temperature is sufficient for the load to be adequately washed, the electric motor is operated and the pump drives hot water to the spray jets. - The fan on the motor directs the cooling air blast, which cools the motor, from the
circular duct 12 into theduct 5, but thecompartment 13c containing the vent is closed, and so the air spills out of theduct 12 both where it fits into theduct 5 and at its other, open, end. After the end of the pre-wash thesector 14 rotates to open the main wash compartment. As before, the spray jets dislodge the soap from thecompartment 13b as well as spray the load itself. - When the main wash has been completed, the tub is emptied and re-filled with fresh water, which is heated in order to rinse the load. After the rinse, the tub again drains.
- In previous dishwasher constructions, a heating element set into the floor of the tub surrounding the floor of the tub is then activated, and dries the dishes by radiant heat energy. In accordance with the invention, however, even though the tub has been drained the motor is kept running while the
sector 14 is moved to uncover thecompartment 13c containing the vent. Now that the vent is open, cooling air drawn through theduct 12 surrounding the fan is now directed through theduct 5 and into the tub before venting to the atmosphere via the vent in the soap dispenser. It has been found that the cooling air forced through the tub, in conjunction with the residual heat of the load, is sufficient to dry the dishes. - Among the advantages of the arrangement described is that the heating element can be chosen and fitted with a view only to heating water, and considerations of radiant heating can be ignored: in particular the heating element can be positioned in the sump totally immersed in water (thereby making for greater efficiency) and the sump itself can be of plastics material. Further, the spray head can also be defined by plastics material.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8803784 | 1988-02-18 | ||
GB8803784A GB2214788B (en) | 1988-02-18 | 1988-02-18 | Dishwasher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0329289A1 true EP0329289A1 (en) | 1989-08-23 |
EP0329289B1 EP0329289B1 (en) | 1991-10-30 |
Family
ID=10631952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890300639 Expired EP0329289B1 (en) | 1988-02-18 | 1989-01-24 | Dishwasher |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0329289B1 (en) |
DE (1) | DE68900367D1 (en) |
GB (1) | GB2214788B (en) |
GR (1) | GR3003092T3 (en) |
NO (1) | NO173484C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0493065A1 (en) * | 1990-12-28 | 1992-07-01 | Whirlpool Corporation | Air flow control for a dishwasher |
EP1127531A2 (en) * | 2000-02-24 | 2001-08-29 | Electrolux Zanussi S.p.A. | Dishwashing machine with air cooling system |
EP1172060A2 (en) * | 2000-07-03 | 2002-01-16 | Electrolux Zanussi S.p.A. | Dishwashing machine with air cooling system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9703220L (en) * | 1997-09-08 | 1999-03-09 | Split Vision Dev Ab | Device for dishwashers |
GB9901239D0 (en) * | 1999-01-20 | 1999-03-10 | Osman O | Method and apparatus for removing water stains from tableware |
US7754025B1 (en) | 2000-06-08 | 2010-07-13 | Beverage Works, Inc. | Dishwasher having a door supply housing which holds dish washing supply for multiple wash cycles |
US7083071B1 (en) | 2000-06-08 | 2006-08-01 | Beverage Works, Inc. | Drink supply canister for beverage dispensing apparatus |
CN109805873B (en) * | 2019-04-02 | 2024-02-02 | 杭州老板电器股份有限公司 | Double-air-duct exhaust device and dish-washing machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103227A (en) * | 1961-04-18 | 1963-09-10 | Westinghouse Electric Corp | Dishwasher apparatus |
US3126024A (en) * | 1964-03-24 | jellies | ||
US3130737A (en) * | 1962-10-09 | 1964-04-28 | Gen Electric | Automatic dishwashing appliance |
US3241563A (en) * | 1964-03-11 | 1966-03-22 | Gen Motors Corp | Forced air drying system for a dishwasher |
-
1988
- 1988-02-18 GB GB8803784A patent/GB2214788B/en not_active Expired - Lifetime
-
1989
- 1989-01-24 DE DE8989300639T patent/DE68900367D1/en not_active Expired - Lifetime
- 1989-01-24 EP EP19890300639 patent/EP0329289B1/en not_active Expired
- 1989-02-16 NO NO890653A patent/NO173484C/en unknown
-
1991
- 1991-11-07 GR GR91401704T patent/GR3003092T3/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3126024A (en) * | 1964-03-24 | jellies | ||
US3103227A (en) * | 1961-04-18 | 1963-09-10 | Westinghouse Electric Corp | Dishwasher apparatus |
US3130737A (en) * | 1962-10-09 | 1964-04-28 | Gen Electric | Automatic dishwashing appliance |
US3241563A (en) * | 1964-03-11 | 1966-03-22 | Gen Motors Corp | Forced air drying system for a dishwasher |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0493065A1 (en) * | 1990-12-28 | 1992-07-01 | Whirlpool Corporation | Air flow control for a dishwasher |
EP1127531A2 (en) * | 2000-02-24 | 2001-08-29 | Electrolux Zanussi S.p.A. | Dishwashing machine with air cooling system |
EP1127531A3 (en) * | 2000-02-24 | 2002-07-03 | Electrolux Zanussi S.p.A. | Dishwashing machine with air cooling system |
EP1172060A2 (en) * | 2000-07-03 | 2002-01-16 | Electrolux Zanussi S.p.A. | Dishwashing machine with air cooling system |
EP1172060A3 (en) * | 2000-07-03 | 2002-07-24 | Electrolux Zanussi S.p.A. | Dishwashing machine with air cooling system |
Also Published As
Publication number | Publication date |
---|---|
GB2214788B (en) | 1991-10-02 |
NO890653L (en) | 1989-08-21 |
NO890653D0 (en) | 1989-02-16 |
GR3003092T3 (en) | 1993-02-17 |
EP0329289B1 (en) | 1991-10-30 |
GB2214788A (en) | 1989-09-13 |
DE68900367D1 (en) | 1991-12-05 |
NO173484B (en) | 1993-09-13 |
NO173484C (en) | 1993-12-22 |
GB8803784D0 (en) | 1988-03-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5337500A (en) | Utensil drying apparatus | |
JPS607641Y2 (en) | Dishwasher | |
KR102384522B1 (en) | Dishwasher | |
US3863657A (en) | Dishwasher and sink combination | |
JPH05285085A (en) | Dish washer | |
SE505058C2 (en) | Dishwasher with dryer including two-sided rotary fan | |
EP1415588A2 (en) | Dishwasher | |
EP0329289B1 (en) | Dishwasher | |
US3397708A (en) | Forced air drying system for a dishwasher | |
JP6868768B2 (en) | dishwasher | |
US3241563A (en) | Forced air drying system for a dishwasher | |
CN210300904U (en) | Tableware cleaning machine | |
JP2019080603A (en) | dishwasher | |
JP2001252235A (en) | Dishwasher | |
JP2001252234A (en) | Dishwasher | |
JP3799719B2 (en) | Dishwasher | |
US3031564A (en) | Dishwashing machine | |
JP3757346B2 (en) | Dishwasher | |
JPS594606Y2 (en) | dishwasher | |
JP6906142B2 (en) | dishwasher | |
JPS60842Y2 (en) | Dishwasher exhaust structure | |
JP2909431B2 (en) | dishwasher | |
JPS6014436Y2 (en) | dishwasher | |
JP3713826B2 (en) | dishwasher | |
JPS58464Y2 (en) | Dishwasher |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GR IT NL SE |
|
17P | Request for examination filed |
Effective date: 19891002 |
|
17Q | First examination report despatched |
Effective date: 19900322 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GR IT NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19911030 Ref country code: NL Effective date: 19911030 Ref country code: BE Effective date: 19911030 |
|
ITF | It: translation for a ep patent filed | ||
REF | Corresponds to: |
Ref document number: 68900367 Country of ref document: DE Date of ref document: 19911205 |
|
ET | Fr: translation filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GR Ref legal event code: FG4A Free format text: 3003092 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19931129 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GR Payment date: 19940131 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19940311 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19950731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19950929 |
|
REG | Reference to a national code |
Ref country code: GR Ref legal event code: MM2A Free format text: 3003092 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19951003 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050124 |