EP0287772A1 - Elément chauffant pour appareils électroménagers - Google Patents

Elément chauffant pour appareils électroménagers Download PDF

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Publication number
EP0287772A1
EP0287772A1 EP88102549A EP88102549A EP0287772A1 EP 0287772 A1 EP0287772 A1 EP 0287772A1 EP 88102549 A EP88102549 A EP 88102549A EP 88102549 A EP88102549 A EP 88102549A EP 0287772 A1 EP0287772 A1 EP 0287772A1
Authority
EP
European Patent Office
Prior art keywords
tube
heating element
water
element according
thermostat
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
Application number
EP88102549A
Other languages
German (de)
English (en)
Other versions
EP0287772B1 (fr
Inventor
Sandro Marcer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IRCA SpA Industria Resistenze Corazzate e Affini
Original Assignee
IRCA SpA Industria Resistenze Corazzate e Affini
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 IRCA SpA Industria Resistenze Corazzate e Affini filed Critical IRCA SpA Industria Resistenze Corazzate e Affini
Publication of EP0287772A1 publication Critical patent/EP0287772A1/fr
Application granted granted Critical
Publication of EP0287772B1 publication Critical patent/EP0287772B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
    • 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
    • A47L15/4285—Water-heater arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/58—Heating hoses; Heating collars

Definitions

  • This invention relates to a heating element for household electrical appliances.
  • a further drawback of known methods is the need in such household electrical appliances to use safety and operational thermostats which have necessarily to be installed in the bottom of the appliance and inevitably require this to be drilled.
  • Another drawback is that if the minimum water quantity to be heated, and already representing energy wastage, corresponds to that required for operating the household electrical appliance at full load, it is certainly excessive for reduced loads, at which it also represents excessive detergent and electricity consumption.
  • a heating element for connecting into the wash circuit of a household electrical appliance characterised by consisting substantially of a plastics tube in which an armoured resistance element is inserted, partially protruding from the surface of the tube lapped by the water.
  • the element according to the invention consists essentially of a plastics tube 1 in which an armoured resistance element 2 disposed in a coil arrangement is embedded.
  • the plastics material is preferably formed by nylon, resistant at least at 250 C
  • the thickness of the plastics tube 1, the diameter of the armoured resistance 2 and their mutual position are chosen so that the resistance 2 protrudes from the inner surface of the tube 1 but not from the external one, as it clarly results in figure 2.
  • thermostat 3 Also embedded in the thickness of the tube 1 there is a safety thermostat 3 which is electrically connected into the power supply circuit of the resistance element 2. Further operational thermostats 4 and 5 can also be embedded in the tube 1, as clarified hereinafter.
  • the described heating element is connected into the spray circuit of a househood electrical appliance such as a dishwasher.
  • a househood electrical appliance such as a dishwasher.
  • it is connected in series with a pump 7 which has its delivery side connected to the two rotary sprinklers 8 provided in the dishwasher wash compartment, and its suction side connected to the bottom of the wash compartment.
  • the operation of the element according to the invention is as follows: during filling, a valve 9 is opened to allow water feed from the outside. After filling, the valve 10 is closed and the pump 8 and resistance element 2 of the device 6 are powered. As the water circulated by the pump 8 passes through the tube 1, it is gradually heated and emerges from the rotary sprinklers 9 at a temperature which increases until the predetermined temperature for the particular chosen wash cycle is reached. Depending on the particular stage in the wash cycle, the water can be circulated either alone or together with detergent fed simultaneously with it or separately. In any case the water always ensures that the resistance 2 is kept at an enough low temperature value so not to cause the melting of the plastics tube.
  • the safety thermostat 3 is provided, which is adjusted at a temperature value higher than that most admissible for the water to be heated, but much lower than the temperature value which could cause the damaging of the plastics tube 1.
  • the tube 1 is kept horizontally, with the safety thermostat 3 placed in the higher side of this. In such a way the heating device always operatese in safety condition, since the side of the tube 1 in which the thermostat 3 is embedded is certainly the more stressed in the case of lack of water.
  • thermostats 4 and 5 which have the function of interrupting the feed of the electrical resistance, but have operating values corresponding to the operating temperatures for different wash cycles foreseen for the machine.
  • the heating element according to the invention has numerous advantages over conventional heating elements, and in particular, compared with a resistance element immersed in the water lying in the bottom of the appliance: - it reduces the quantity of water to be heated, the quantity of electrical energy required for its heating, and the quantity of detergent - it enables the thermostat or thermostats to be mounted directly in the heating element, so substantially simplifying the assembly of the household electrical appliance and avoiding the need to make holes in the base of the appliance, which besides creating installation problems often produce sealing problems; compared with a heating element in the form of a steel tube with a brazed resistance element and wound capillary: - it eliminates the presence of the steel tube and the laboriousness operation of brazing the armoured resistance thereof, - it consequently does not require the use of brazing paste, which is of high cost and requires specialist application, - it is practically insensitive to brazing defects and generally to defects resulting in partial separation of the resistance element from the tube, and - it does not require the use of ca

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
EP88102549A 1987-02-24 1988-02-22 Elément chauffant pour appareils électroménagers Expired - Lifetime EP0287772B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8784117A IT1214261B (it) 1987-02-24 1987-02-24 Elemento scaldante per apparecchi elettrodomestici.
IT8411787 1987-02-24

Publications (2)

Publication Number Publication Date
EP0287772A1 true EP0287772A1 (fr) 1988-10-26
EP0287772B1 EP0287772B1 (fr) 1992-05-13

Family

ID=11324252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102549A Expired - Lifetime EP0287772B1 (fr) 1987-02-24 1988-02-22 Elément chauffant pour appareils électroménagers

Country Status (5)

Country Link
EP (1) EP0287772B1 (fr)
DE (1) DE3870975D1 (fr)
ES (1) ES2031938T3 (fr)
IT (1) IT1214261B (fr)
TR (1) TR23571A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903649C1 (en) * 1989-02-08 1990-04-12 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De Electric flow heater for liquids
EP0554645A1 (fr) * 1992-02-05 1993-08-11 I.A.T.- ISTITUTO ANALITICO TUSCANESE S.r.l. Système de lavage pour machines à laver le linge et la vaisselle construit pour fonctionner à bas voltage
WO2017115394A1 (fr) 2015-12-29 2017-07-06 Carlo Rupnik Concentrateur tubulaire pour rayonnement concentrique d'ondes électromagnétiques
DE102019003811A1 (de) * 2019-05-31 2020-12-03 Valeo Thermal Commercial Vehicles Germany GmbH Elektrisches Heizgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US938237A (en) * 1908-04-04 1909-10-26 John Arthur Hunnewell Electrically-operated water-heater.
DE2913988A1 (de) * 1978-06-29 1980-01-17 Bulten Kanthal Ab Elektrische fluidheizvorrichtung mit einer widerstandsdraht-stachelspule
DE3531525C1 (de) * 1985-09-04 1987-01-22 Daimler Benz Ag Vorbauanordnung fuer Nutzfahrzeuge,insbesondere fuer Omnibusse

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA288784A (de) * 1984-09-10 1985-12-15 Vaillant Gmbh Elektrischer heizkoerper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US938237A (en) * 1908-04-04 1909-10-26 John Arthur Hunnewell Electrically-operated water-heater.
DE2913988A1 (de) * 1978-06-29 1980-01-17 Bulten Kanthal Ab Elektrische fluidheizvorrichtung mit einer widerstandsdraht-stachelspule
DE3531525C1 (de) * 1985-09-04 1987-01-22 Daimler Benz Ag Vorbauanordnung fuer Nutzfahrzeuge,insbesondere fuer Omnibusse

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903649C1 (en) * 1989-02-08 1990-04-12 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De Electric flow heater for liquids
EP0554645A1 (fr) * 1992-02-05 1993-08-11 I.A.T.- ISTITUTO ANALITICO TUSCANESE S.r.l. Système de lavage pour machines à laver le linge et la vaisselle construit pour fonctionner à bas voltage
WO2017115394A1 (fr) 2015-12-29 2017-07-06 Carlo Rupnik Concentrateur tubulaire pour rayonnement concentrique d'ondes électromagnétiques
RU2732849C2 (ru) * 2015-12-29 2020-09-23 Карло РУПНИК Трубчатый концентратор для концентрического излучения электромагнитных волн
DE102019003811A1 (de) * 2019-05-31 2020-12-03 Valeo Thermal Commercial Vehicles Germany GmbH Elektrisches Heizgerät

Also Published As

Publication number Publication date
EP0287772B1 (fr) 1992-05-13
IT1214261B (it) 1990-01-10
DE3870975D1 (de) 1992-06-17
IT8784117A0 (it) 1987-02-24
TR23571A (tr) 1990-04-03
ES2031938T3 (es) 1993-01-01

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