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WO2011066019A2 - Appareil de chauffage à écoulement traversant - Google Patents

Appareil de chauffage à écoulement traversant Download PDF

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Publication number
WO2011066019A2
WO2011066019A2 PCT/US2010/047508 US2010047508W WO2011066019A2 WO 2011066019 A2 WO2011066019 A2 WO 2011066019A2 US 2010047508 W US2010047508 W US 2010047508W WO 2011066019 A2 WO2011066019 A2 WO 2011066019A2
Authority
WO
WIPO (PCT)
Prior art keywords
heater
flow
heating element
cylindrical wall
tubular housing
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.)
Ceased
Application number
PCT/US2010/047508
Other languages
English (en)
Other versions
WO2011066019A3 (fr
Inventor
Alvin L. Slayton
Lucas L. Fowler
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.)
Emerson Electric Co
Original Assignee
Emerson Electric Co
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 Emerson Electric Co filed Critical Emerson Electric Co
Publication of WO2011066019A2 publication Critical patent/WO2011066019A2/fr
Publication of WO2011066019A3 publication Critical patent/WO2011066019A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • 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
    • 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means

Definitions

  • the present disclosure relates to a fluid heater for an appliance.
  • the present disclosure relates to an improved construction for a flow-through heater for heating water or other liquids and/or generating steam.
  • Appliances such as dishwashers, clothes washers and water heaters, for example, employ a heater for heating water or other liquid that is used in the appliance.
  • a heater for heating water or other liquid that is used in the appliance.
  • One type of heater used is a flow-through heater.
  • An exemplary prior art flow-through heater is shown in Figure 1 .
  • the flow-through heater 10 includes a hollow, metal, cylindrical member 12 having a passageway 14 extending along its longitudinal axis 16 through which water or other liquid to be heated flows.
  • An electric heating element 18 is generally spirally-wrapped around the circumference of the cylindrical member 12 for a length along its longitudinal axis 16.
  • the cylindrical member 12 is made from stainless steel and the electric heating element 10 is brazed or crimped to an exterior surface of the cylindrical wall 24.
  • the temperature sensor assemblies 20 and 22 can house a temperature sensor, like a thermostat device or NTC device.
  • a temperature sensor like a thermostat device or NTC device.
  • one temperature sensor assembly 20 provides an electrical connection to a power source for the heating element 10 and includes a thermostat.
  • Another temperature sensor assembly 22 carries an NTC temperature sensor.
  • the electrical heating element 18 generates heat that is transferred to the cylindrical member 12 and, ultimately, to the fluid passing through the heater 10.
  • a control system (not shown) regulates the temperature of the heating element 10 and/or fluid passing through the heater 10 based on feedback from the temperature sensor assemblies 20 and 22.
  • a shroud 24 is located over the heating element 18 to cover and protect the heating element 18 and shield the surrounding area from the heating element 18.
  • a flow-through heater of the present disclosure includes a tubular housing and a heating element.
  • the tubular housing defines a passageway.
  • the heating element is provided in the passageway and attached to the tubular housing.
  • the heating element includes a resistive wire housed within an electrically insulating coating.
  • the heating element includes a coiled wire portion defining a channel extending in a direction along a longitudinal axis of the tubular housing.
  • the coiled wire portion defines a channel extending along the longitudinal axis to enable a fluid to flow therethrough.
  • the coiled wire portion contacts the fluid when the fluid flows through the channel.
  • a flow-through heater of the present disclosure includes a metal cylindrical wall, a plurality of metal fin elements, and a heating element.
  • the metal cylindrical wall includes an inner peripheral surface.
  • the inner peripheral surface defines a passageway along a longitudinal axis of the cylindrical wall.
  • the plurality of metallic fin elements extend inwardly from the inner peripheral surface and are located in the passageway.
  • the heating element is provided on an outer peripheral surface of the metallic cylindrical wall.
  • Figure 1 is a front perspective view of a prior art flow-through heater
  • Figure 2A is a front perspective view of a flow-through heater according to a first embodiment of the present disclosure
  • Figure 2B is a front cross-sectional perspective view of a flow- through heater according to a first embodiment of the present disclosure
  • Figure 3 is an enlarged, partial end view showing a connection between a tubular housing and an insulator of the flow-through heater according to the first embodiment of the present disclosure
  • Figure 4 is an enlarged, partial cross-sectional view showing a connection between a terminal assembly and a tubular housing of a heater according to the first embodiment of the present disclosure
  • Figure 5 is a front perspective view of a flow-through heater according to a second embodiment of the present disclosure.
  • Figure 6A is a front cross-sectional perspective view of a flow- through heater according to a second embodiment of the present disclosure
  • Figure 6B is an end view of a flow-through heater according to a second embodiment of the present disclosure.
  • Figure 7 is an enlarged, partial cross-sectional view showing connection between a tubular housing and an electrical heating element of a flow-through heater according to a second embodiment of the present disclosure
  • Figure 8 is a perspective view of a flow-through heater according to a third embodiment of the present disclosure
  • Figure 9 is an exploded perspective view of a flow-through heater according to a third embodiment of the present disclosure.
  • Figure 10 is an exploded perspective view of a flow-through heater according to a third embodiment of the present disclosure.
  • Figure 1 1 a partial cross-sectional perspective view of a flow- through heater according to a fourth embodiment of the present disclosure
  • Figure 12 is a perspective view of a flow-through heater according to a fifth embodiment of the present disclosure.
  • Figure 13 is a cross-sectional perspective view of a flow- through heater according to a fifth embodiment of the present disclosure.
  • Figure 14 an end view of a flow-through heater according to a fifth embodiment of the present disclosure.
  • Figure 15 is a perspective view of a flow-through heater according to a sixth embodiment of the present disclosure.
  • Figure 16 is an exploded perspective view of a flow-through heater according to a sixth embodiment of the present disclosure.
  • Figure 17 is an end view of a tubular housing of a flow-through heater according to a sixth embodiment of the present disclosure.
  • Figure 18 is a side view of a heating assembly of a flow-through heater according to a sixth embodiment of the present disclosure.
  • Figure 19 is a perspective view of a flow-through heater according to a seventh embodiment of the present disclosure.
  • a flow-through heater 40 generally includes a tubular housing 42, an electrical heating element 44 provided inside the tubular housing 42, and a pair of terminal assemblies 46 mounted on the tubular housing 42.
  • the tubular housing 42 extends along a longitudinal axis 50 and includes a cylindrical wall 52 and a support member 53 provided inside the cylindrical wall 52.
  • the support member 53 includes a pair of fin elements 54 in the present embodiment.
  • the cylindrical wall 52 defines a passageway 56 extending along the longitudinal axis 50 to enable a fluid to flow therethrough.
  • the fin elements 54 extend radially inwardly from an inner surface of the cylindrical wall 52.
  • the fin elements 54 extend a predetermined length along the longitudinal axis 50 to support and position the heating element 44 in the passageway 56.
  • the fin elements 54 may be integrally formed with the cylindrical wall 52 or attached to the cylindrical wall 52 by any securing means known in the art.
  • the fin elements 54 and the cylindrical wall 52 may be formed of the same material, for example, aluminum, in one molding process.
  • the fin elements 54 may be made of a material different from that of the cylindrical wall 52 and attached to the cylindrical wall 52 by any conventional securing means, such as welding or riveting.
  • the heating element 44 includes a coiled resistance wire and an electrically insulating coating 59 (shown in Figure 4) over the wire surface to electrically insulating the resistance wire.
  • the resistance wire may be made from metals such as Fe/Cr/AI or Ni/Cr.
  • the electrically insulating coating 59 may include a corrosion-resistant, thermally conductive material.
  • the materials for the electrically insulating coating 59 include, but are not limited to, epoxy, polyester, polyurethane, polyamide, polyimide, polyethersulfone (PES), polysulfone (PSU), and polyphenylsulfone.
  • the heating element 44 includes a coiled wire portion 57 and a pair of connecting portions 58.
  • the coiled wire portion 57 includes a plurality of turns, each turn adjacent to one another to form a compact structure. Therefore, heat generated per unit length of the heating element 44 is increased as opposed to prior art heaters under similar operating conditions.
  • the coiled wire portion 57 defines a channel therein and extends a predetermined distance along the length of the fin elements 54. The channel is coaxially aligned with the passageway 56 of the cylindrical wall 52.
  • the pair of connecting portions 58 extend from opposing ends of the coiled wire portion 57 and connect the heating element 44 to an external power source (not shown).
  • An insulator 60 is provided between the heating element 44 and each of the fin elements 54 to insulate the heating element 44 from the fin elements 54.
  • the insulators 60 provide further electrical insulation for the heating element 44.
  • the insulators 60 may be attached to the fin elements 54 in a snap-fit manner or in a sliding engagement.
  • the insulators 60 each include a receiving portion 62 and a pair of clamping legs 64.
  • Each of the receiving portions 62 includes a base portion 61 extending along the longitudinal axis 50 of the tubular housing 42 and a pair of fingers 63 provided at longitudinal ends of the base portion 61 .
  • the base portion 61 and the fingers 63 engage and receive the coiled wire portion 57 of the heating element 44 therebetween.
  • the clamping legs 64 extend along the longitudinal axis 50 of the tubular member 42 and define a slot 65 for receiving a head 67 of the fin element 54.
  • the clamping legs 64 are secured to the respective one of the fin elements 54 by inserting the head 67 into the slot 65.
  • the heads 67 may be inserted into the slot 65 in a snap-fit manner along a radial direction relative to the cylindrical wall 52.
  • the insulators 60 may be attached by sliding the heads 67 into the slots 65 along the longitudinal axis 50 of the cylindrical wall 52. While the clamping legs 64 are shown to extend along the entire length of the base portion 61 , it is understood and appreciated that a plurality of clamping legs 64 may be formed at an interval along the length of the base portion 61 .
  • the terminal assemblies 46 are inserted through openings 69 of the cylindrical wall 52 and connect the heating element 44 to an external power source (not shown).
  • the terminal assemblies 46 each include a terminal housing 66 and a terminal pin 68 inserted through the terminal housing 66.
  • the terminal housing 66 is made of an electrically insulating material.
  • a cavity 70 is defined at an end of the terminal housing 66 that is located inside the cylindrical wall 52.
  • the terminal pin 68 includes a contact end 72 extending into the cavity 70.
  • the connecting portions 58 of the heating element 44 each include a contact end 74 extending through the terminal housing 66 and into the cavity 70.
  • the contact ends 74 of the heating element 44 are not coated by the electrically insulating coating 59.
  • the contact end 72 of the terminal pin 68 contacts the contact end 74 of the heating element 44 in the cavity 70 to establish electrical connection between the heating element 44 and the terminal pins 68.
  • the contact ends 72 of the terminal pins 68 are soldered to the contact ends 74 of the heating element 44 to ensure proper contact and electrical connection.
  • a potting material 76 may fill in the cavity 70 after the soldering process to embed and insulate the contact ends 74 of the heating element 44 and the contact ends 72 of the terminal pins 68 therein.
  • the heater 40 has a quick response and an improved heat transfer efficiency.
  • the heating element 44 is located in the passageway 56. Fluid, which enters the passageway 56, flows around the heating element 44 and is in direct contact with the heating element 44. The fluid flows inside and outside the coiled wire portion 57. Heat generated by the heating element 44 is directly transferred to the fluid. No additional component is located between the heating element 44 and the fluid to absorb heat energy. Therefore, heat transfer efficiency of the heater 40 is improved.
  • the heating element 44 can be more easily attached to the tubular housing 42 by using the fin elements 54 and the insulators 60 without time-consuming welding process. Therefore, manufacturing process becomes easier, resulting in reduced manufacturing costs and increased throughput.
  • a heater 80 includes a tubular housing 82 and a heating element 84.
  • the tubular housing 82 includes a cylindrical wall 86, a support member including a plurality of fin elements 88, and a pair of hollow portions 90.
  • the cylindrical wall 86, the fin elements 88 and the pair of hollow portions 90 are integrally formed from a polymer material.
  • the cylindrical wall 86 defines a passageway 87 along the longitudinal axis 89.
  • the fin elements 88 extend from an inner surface 85 of the cylindrical wall 86 for supporting and positioning the heating element 84 in the passageway 87.
  • the fin elements 88 each include an elongated body 89 and a pair of lateral fingers 91 extending laterally from the elongated body 89.
  • the heating element 84 is provided between and clamped by the lateral fingers 91 .
  • the tubular housing 82 is made from a polymer material. Therefore, the heating element 84 can be directly placed on the fin elements 88. Because the fin elements 88 are made of an electrically insulating material, the heating element 84 can be attached directly to the elements 88. The number of components that form the heater 80 may be further reduced, resulting in a more simplified structure.
  • the hollow portions 90 extend radially outwardly from an outer surface 92 of the cylindrical wall 86 and are integrally formed with the cylindrical wall 86.
  • the hollow portions 90 are used as terminal housings and each define a cavity 94.
  • the connecting portions 96 of the heating element 84 extend through the cavity 94 and the hollow portions 90 to connect to an external power source.
  • a potting material 76 may fill the cavity 94 to secure the connecting portions 96 of the heating element 84 to the hollow portions 90.
  • a heater 100 according to a third embodiment of the present disclosure includes a tubular housing 102, a heating element 104, a pair of terminal assemblies 105, a fuse assembly 106, a temperature sensor assembly 108, and a pair of securing members 1 10.
  • the tubular housing 102 includes a first part 1 12 and a second part 1 14 that jointly define a cylindrical shape and a passageway 1 16.
  • the first part 1 12 and the second part 1 14 are made of a plastic material.
  • the first part 1 12 defines two openings 120 for receiving the fuse assembly 106 and the temperature sensor assembly 108.
  • An aluminum material is molded to the first part 1 12 of the tubular housing 1 12 in the openings 120 to provide an aluminum contact surface 121 .
  • a fuse (not shown) of the fuse assembly 106 and a temperature sensor (not shown) of the temperature sensor assembly 108 are provided at the aluminum contact surface 121 .
  • the temperature sensor may be a thermostat or an NTC device.
  • the fuse assembly 106 is mounted adjacent to an inlet of the passageway 1 16 and upstream from the heating element 104.
  • the temperature sensor assembly 108 is mounted adjacent to an outlet of the passageway 1 16 and downstream from the heating element 104.
  • the fuse assembly 106 and the temperature sensor assembly 108 each include a casing 122 and a pair of terminals 124 attached to the casing 122.
  • the terminals 124 connect the fuse or the temperature sensor to a power source or a control device (not shown).
  • the casings 122 of the fuse assembly 106 and the temperature sensor assembly 108 each define a slot 123.
  • the securing members 1 10 are in the form of a strap positioned in the slots 123 and wrapped around the tubular housing 102.
  • the securing members 1 10 press the casings 122 of the fuse assembly 106 and the temperature sensor assembly 108 against the aluminum contact surface 121 .
  • the fuse and the temperature sensor can contact the aluminum contact surface 121 to ensure proper detection of the temperature of the tubular housing 102 and the fluid flowing therethough.
  • the first part 1 12 further includes a pair of hollow portions 1 16 integrally formed with the first part 1 12 and between the fuse assembly 106 and the temperature sensor assembly 108.
  • the hollow portions 1 16 each define a cavity 122.
  • a terminal pin 125 is molded to each of the hollow portions 1 16 to form the terminal assembly 105.
  • the terminal pins 125 each have a contact end 1 19 extending into the cavity 122 of the respective one of the hollow portions 1 16.
  • the terminal pin 125 connects the heating element 104 to an external power source (not shown).
  • a potting material may be provided in cavities 122 of the hollow portions 1 16 to insulate the contact ends 1 19 of the terminal pins 125 and the contact ends 1 17 of the heating element 1 04.
  • the heating element 1 04 may be attached to the tubular housing 102 by a pair of fin elements 131 .
  • the two-piece structure of the tubular housing 1 02 facilitates soldering of the contact ends 1 1 7 of the heating element 104 to the contact ends 1 1 9 of the terminal pins 1 1 8.
  • the two-piece structure also facilitates mounting of the heating element 1 04, the fuse assembly 1 06 and the temperature sensor assembly 1 08 to the tubular housing 1 02.
  • the first part 12 and the second part 1 14 of the tubular housing 1 02 are joined, for example, by high frequency welding.
  • a heater 1 26 includes a tubular housing 1 25 having a cylindrical wall 1 27 and a heating element 1 28.
  • the cylindrical wall 1 27 is made of stainless steel.
  • the heating element 128 includes a coiled wire portion defining an outside diameter substantially equal to the inside diameter of the cylindrical wall 1 27.
  • the heating element 1 28 is mounted inside the cylindrical wall 1 27 in an interference-fit manner and is in direct contact with an inner surface 1 29 of the cylindrical wall 1 27.
  • the heating element 1 28 is coated with an electrically insulating coating to electrically insulate the heating element 1 28 from the cylindrical wall 1 27 and the fluid flowing therethrough.
  • a pair of terminal assemblies may be provided at the tubular housing 1 25 to connect the heating element 1 28 to an external power source.
  • the terminal assemblies may have a structure similar to that in the first embodiment shown in Figures 2A to 4.
  • a heater 1 30 includes a tubular housing 1 32 and a heating element 1 34.
  • the tubular housing 1 32 includes a cylindrical wall 1 36 and a support member comprising a plurality of fin elements 138 extending inwardly from an inner peripheral surface 139 of the cylindrical wall 136.
  • the plurality of fin elements 138 are shown in the drawings and spaced apart equally (e.g., 3 fin elements at 120° apart) along the inner peripheral surface 139 of the cylindrical wall 136.
  • the cylindrical wall 136 and the fin elements 138 may be integrally formed from a plastic material in one molding process.
  • the fin elements 138 jointly define a receiving space 141 (indicated by dashed line) for receiving the heating element 134 therein.
  • the heating element 134 may be slid into the receiving space and supported by the fin elements 138.
  • the heating element 134 includes a coiled wire portion 140 and a pair of connecting portions 142.
  • the connecting portions 142 may extend through the cylindrical wall 136 of the tubular housing 132 to be connected to an external power source (not shown).
  • the heating element 134 is covered with an electrically insulating coating to insulate the heating element 134.
  • the cylindrical wall 136 defines a passageway 137.
  • the passageway is generally divided by the coiled wire portion 140 into a first channel 144 and a plurality of second channels 146.
  • the first channel 144 is surrounded by the coiled wire portion 140.
  • the second channels 146 are defined by adjacent fin elements 138 and the outer surface of the coiled wire portion 140. Fluid flows in the first channel 144 and the plurality of second channels 146.
  • a heater 150 includes a tubular housing 150, a heating assembly 152, a pair of terminal assemblies 154, a fuse assembly 156, and a temperature sensor assembly 158.
  • the tubular housing 152 includes a cylindrical wall 160 and two hollow portions 162 extending outwardly from an outer surface 157 of the cylindrical wall 160.
  • the cylindrical wall 160 defines a passageway 161 extending along a longitudinal axis 163 of the cylindrical wall 160.
  • the fuse assembly 156 and the temperature sensor assembly 158 are inserted into the hollow portions 162 and provided downstream from the terminal assemblies 154.
  • a connector housing 159 receives a terminal 161 from each of the fuse assembly 156 and the temperature sensor assembly 158.
  • the terminals 161 are connected to a control device (not shown).
  • the terminal assemblies 154 are provided adjacent to an inlet of the passageway 1 62 and upstream from the fuse assembly 156 and the temperature sensor assembly 158.
  • the heating assembly 152 includes a heating element 164 and a support member comprising a plurality of support rails 166 attached to the heating element 164.
  • the support rails 166 each include an elongated body 168 and a pair of fingers 170 extending laterally from the elongated body 168. The fingers 170 clamp the heating element 164 therebetween.
  • the support rails 166 are matingly inserted into slots 172 of the cylindrical wall 160.
  • the slots 172 are formed on the inner surface 175 of the cylindrical wall 160 and extend along the length of the cylindrical wall 160.
  • the heating element 164 includes a coiled wire portion 174 and a pair of connecting portions 176 for connecting to the terminal assemblies 154.
  • the connecting portions 176 may be in the form of nuts.
  • the connecting portions 176 are aligned with the terminal assemblies 154.
  • the terminal assemblies 154 are connected to the connecting portions 176.
  • a heater 200 includes a tubular housing 202 and a heating element 204 disposed around and outwardly of the tubular housing 202.
  • the tubular housing 202 includes a cylindrical wall 206 and a support member comprising a plurality of fin elements 208 extending radially inwardly from an inner surface 201 of the cylindrical wall 206.
  • the cylindrical wall 206 defines a fluid passageway 210.
  • the plurality of fin elements 208 are integrally formed with the cylindrical wall 206 and are disposed in the fluid passageway 210.
  • the cylindrical wall 206 and the fin elements 208 are made of aluminum.
  • the heating element 204 is coiled around the cylindrical wall 206 and contacts an outer surface of the cylindrical wall 206.
  • the heating element 204 includes a resistive wire and an electrically insulating coating on the resistive wire.
  • An outer surface of the cylindrical wall that is in contact with the heating element is coated with an electrically insulating layer 212.
  • a temperature sensor assembly 214 and a fuse assembly 216 are provided at each end of the tubular housing 202.
  • the temperature sensor assemblies 214 monitor the temperature of the cylindrical wall 206 and consequently the fluid flowing therethrough.
  • the fuse assembly 216 protects the heating element 204 from overheating.
  • Securing devices 220 are provided around the cylindrical wall 206 to secure the temperature sensor assembly 214 and the fuse assembly 216 on the tubular housing 202.
  • the heater 200 of this embodiment improves heat transfer efficiency by providing the plurality of fins elements 208 in the fluid passageway 210. While heat from the heating element 204 is transferred indirectly to the fluid through the tubular housing 202, the heater 200 has an advantage of increasing heat transfer efficiency by increasing surface area for heat transfer.
  • the flow-through heater of the present disclosure provides a simplified structure to facilitate manufacturing of the flow-through heater, resulting in reduced manufacturing costs. Moreover, the simplified structure of the flow-through heater improves heater transfer efficiency and reduces heat loss and can more quickly heat the fluid to a desired temperature. While the flow-through heater has been described as a heater for heating fluids to a desired temperature, the flow-through heater may be configured as a steam generator without departing from the scope of the present disclosure. The flow- through heaters of the present disclosure may be used in, for example, dishwaters, laundry machines, or a SPA water heating systems.

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  • 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)
  • Textile Engineering (AREA)
  • Resistance Heating (AREA)
  • Pipe Accessories (AREA)

Abstract

La présente invention concerne un appareil de chauffage à écoulement traversant qui comprend un logement tubulaire et un élément chauffant. Le logement tubulaire définit un passage. L'élément chauffant est situé dans le passage et fixé au logement tubulaire. L'élément chauffant comprend un câble résistif et un revêtement électriquement isolant sur ledit câble. L'élément chauffant comprend une partie câble en spirale enroulée autour d'un axe longitudinal du logement tubulaire. La partie câble en spirale définit un canal s'étendant dans une direction le long de l'axe longitudinal pour permettre l'écoulement d'un fluide à travers celui-ci. La partie câble en spirale est en contact avec le fluide lorsque le fluide s'écoule par le canal.
PCT/US2010/047508 2009-11-30 2010-09-01 Appareil de chauffage à écoulement traversant Ceased WO2011066019A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/627,560 US20110129205A1 (en) 2009-11-30 2009-11-30 Flow-through heater
US12/627,560 2009-11-30

Publications (2)

Publication Number Publication Date
WO2011066019A2 true WO2011066019A2 (fr) 2011-06-03
WO2011066019A3 WO2011066019A3 (fr) 2011-07-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/047508 Ceased WO2011066019A2 (fr) 2009-11-30 2010-09-01 Appareil de chauffage à écoulement traversant

Country Status (2)

Country Link
US (1) US20110129205A1 (fr)
WO (1) WO2011066019A2 (fr)

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WO2020193479A1 (fr) * 2019-03-25 2020-10-01 Sandvik Materials Technology Deutschland Gmbh Dispositif de chauffage électrique pour écoulement de fluide avec ailettes de stabilisation des éléments chauffants

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US11913736B2 (en) * 2017-08-28 2024-02-27 Watlow Electric Manufacturing Company Continuous helical baffle heat exchanger
US10941988B2 (en) * 2017-08-28 2021-03-09 Watlow Electric Manufacturing Company Continuous helical baffle heat exchanger
US11920878B2 (en) * 2017-08-28 2024-03-05 Watlow Electric Manufacturing Company Continuous helical baffle heat exchanger
TWI686581B (zh) * 2018-08-30 2020-03-01 美商瓦特洛威電子製造公司 連續螺旋擋板熱交換器
CN114603322B (zh) * 2022-03-23 2023-06-06 广州熙安环控高科有限公司 片式电加热器制造方法

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EP2910083A4 (fr) * 2012-10-19 2016-06-01 Edwards Vacuum Llc Appareil d'élément chauffant de cartouche
WO2020193479A1 (fr) * 2019-03-25 2020-10-01 Sandvik Materials Technology Deutschland Gmbh Dispositif de chauffage électrique pour écoulement de fluide avec ailettes de stabilisation des éléments chauffants
CN113631871A (zh) * 2019-03-25 2021-11-09 康泰尔有限公司 具有加热元件稳定翅片的流体流电加热器
JP2022527001A (ja) * 2019-03-25 2022-05-27 カンタール ゲーエムベーハー 加熱要素安定化フィンを有する電気流体フロー加熱器
CN113631871B (zh) * 2019-03-25 2022-11-04 康泰尔有限公司 具有加热元件稳定翅片的流体流电加热器
US12281819B2 (en) 2019-03-25 2025-04-22 Kanthal Gmbh Electric fluid flow heater with heating elements stabilization fins

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