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
  • H05B3/78—Heating arrangements specially adapted for immersion heating
  • H05B3/82—Fixedly-mounted immersion heaters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
  • F02N19/00—Starting aids for combustion engines, not otherwise provided for
  • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
  • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
  • F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
• • 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
  • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
  • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
  • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
  • F01M13/00—Crankcase ventilating or breathing
  • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
  • F01M2013/0455—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a de-icing or defrosting system
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
  • F01P11/04—Arrangements of liquid pipes or hoses

Definitions

• the invention is related to an electrical heating device for the heating of a liquid in a vehicle, a special field of use is for heating a cooling liquid for a vehicle engine.
• the publication US 4.770.134 is showing such a heater for the cooling liquid of an engine, where the heater is arranged in the hose system for the cooling liquid.
• the heater consists of a horizontal tube in which a heating element is located.
• the cooling liquid is taken in at one end of the tube and passes out at the other end of the tube.
• the publication US 2006/0144376 is showing and describing a device for heating a flowing gas or liquid, for example at a crank case venting system for an engine.
• the device consists of a unit arranged in the hose system for the crank case ventilation system.
• the unit has a recess, which is not in contact with the moving gas, in which there is arranged a heating element which consists of so called PTC element.
• the purpose of the invention is to obtain a device for heating a liquid in a vehicle where the device is easy to manufacture, has small dimensions, has a low weight, has good efficiency and is easy to install in the vehicle.
• the purpose of the invention is obtained by manufacturing units of the device of a thermoplastic material, that the heating of the liquid is obtained by PTC elements so that control equipment is not necessary and by that the heater is arranged in the hose or pipe system for the liquid.
• figure 1 a view of the heater mounted in a hose system
• figure 2 a section along the line A-A in figure 1
• figure 3 a section along the line B-B in figure 2
• figure 4 a perspective view of the heater when the three main units are separated.
• the illustrated device on the drawings show a heater (10) which is mounted in a hose system (1 1) in a vehicle, for example in a hose system for the cooling liquid for a vehicle engine.
• the heater (10) can be fixed to the engine of the vehicle or a suitable part of the vehicle with fixing elements, which are arranged through holes (12) in the heater if a fixation of the heater (10) is necessary.
• the heater (10) is connected to an electrical energy source external to the vehicle by electrical conductors (13) arranged in a protective cover (14).
• the heater (10) consists of a container (15) which has a first connection nipple (16) to which a part of the hose system (11) is connected for supply of liquid to be heated in the container (15).
• the container (15) has a second connection nipple (17) to which a part of the hose system (1 1) is connected to transport the heated liquid from the container (15).
• the hose system (1 1) is fixed to the first connection nipple (16) and the second connection nipple (17) with suitable hose clamps (18).
• the first connection nipple (16) and the second connection nipple (17) are arranged as far away from each other as possible so that the distance the liquid has to flow through the container is as long as possible.
• the container (15) of the heater (10) has a mainly flat shape.
• the heater (10) has a width between the two mainly flat sides which is only somewhat larger than the outer dimension of the, to the heater (10), connected hoses.
• the container (15) has on one side a connection flange (19) to which a cover (20) is fixed.
• the cover (20) has a connection (21) for the protective cover (14) which surrounds the electrical conductors (13).
• the cover (20) is fixed to the connection flange (19) on the container (15) with suitable fixing elements (22) such, as for example, screws.
• the electrical conductors (13) are connected to a number of heating elements (23) located in a heating plate (24), so designed that the heating elements (23) will not be in direct contact with the liquid in the container (15).
• the heating elements (23) consist of so called PTC elements which have been positioned next to each other to achieve good heat transfer to the heating plate (24) as well as to give the heating plate (24) a desired flat shape.
• PTC elements transmit an amount of energy which is depending on the temperature and the elements do not transmit any energy at a temperature over a selected predetermined temperature. Heating element (23) consisting of PTC elements can therefore be used without any control equipment.
• the design of PTC elements and their connection to electrical conductors is a known technique and will therefore not be explained here.
• the heating plate (24) for the heating elements (23) is designed as a mainly rectangular plate with a first flat side (25) and a second flat side (26) as well as four intermediate sides, a first long side (27) and a second long side (28) as well as a first short side (29) and a second short side (30).
• a flange (31) is arranged at the first short side (29).
• the flange (31) is surrounded by a washer (32).
• the heating plate (24) has at that side which is surrounded by the flange (31 ), a recess (33) so that the heating elements (23) can be placed in the heating plate (24).
• the heating plate (24) is positioned in the inner space of the container (15) which is accessible by an opening (34) arranged on that side of the container (15) where the connection flange (19) is situated.
• the flange (31) of the heating plate (24) with the washer (32) is designed to connect to the connection flange (19) of the container (15).
• the inner space of the container (15) is customized so that the distance between the outer surfaces of the heating plate (24) and the internal surfaces of the container (15) are at a predetermined distance from each other.
• the container (15) therefore also has the shape of a mainly rectangular plate with a first flat side (35) and a second flat side (36) as well as four intermediate sides, a first long side (37) and a second long side (38) as well as a first short side (39) and a second short side (40).
• the connection flange (19) of the container (15) is arranged at the first short side (39).
• the container (15) is placed so that the connection flange (19) is downwards and the first connection nipple (16) for the intake of the liquid is positioned near to the connection flange (19).
• the second connection nipple (17) for the exit of the liquid from the container (15) is positioned on the second short side (40) of the container (15), which is facing away from the connection flange (19)
• the first connection nipple (16) is positioned so that the liquid is flowing in towards one of the four intermediate sides (27, 28, 29, 30) on the heating plate (24), preferably towards one of the long sides (27, 28), which has a small width.
• the stated position of the first connection nipple (16) and second connection nipple (17) causes the liquid to obtain the longest and best flow arrangement past the heating plate (24). That means that when the liquid is flowing past the heating plate (24) the energy uptake from the heating plate (24) is evenly distributed over the surface of the heating plate (24), which means that the temperature over the whole surface of the heating plate (24) will be substantially the same.
• the container (15) is manufactured from a thermoplastic material such as, for example, PA66.
• Thermoplastic materials lose their ability to maintain their shape and their strength at a relatively slight increase of the temperature, therefore it is of importance that the temperature of the liquid in the container (15) at any location does not exceed the temperature at which the chosen thermoplastic material ' s dimensional stability and strength decrease below a predetermined value. If the container (15) for any reason is not full of the liquid it is of importance that the container is so designed that the heat radiation from the heating plate (24) does not cause the temperature of the thermoplastic material in the container (15) to reach that temperature when the thermoplastic material loses the necessary dimensional stability and strength.
• thermoplastic material in the parts of the heater, such as the container (15) and cover (20), leads to a weight reduction of the heater (10) of approximately 30% in relation to a similar heater of metal.
• the liquids which are used for heating a unit such as the engine of a vehicle are normally based on water therefore the working temperature for a heater normally will not exceed 80° C when the heater is in operation.
• the liquid When the engine is running the liquid will reach a temperature of approximately 100° C.
• Thermoplastic material such as PA66 can under short periods cope with temperatures up to approximately 200 0 C therefore it is of importance that the container (15) is designed so that the liquid which passes through the container (15) does not at any location reach a temperature above that value where the material loses its dimensional stability and strength.
• With heating elements (23) which together produce 600W the temperature of the liquid which leaves the container (15) will reach approximately 80° C if the temperature of the entering liquid is approximately 20° C. With heating elements of 600W an increase of the temperature of approximately 60° C is achieved. If the liquid in the container (15) does not circulate, or if the container (15) is not fully filled with liquid, an increase of the temperature will occur.
• the distance between the internal surfaces of the container (15) and the external surfaces of the heating plate (24) are arranged so that an even flow of the liquid through the container (15) is obtained and in a situation when the container (15) is not fully filled with liquid the heat transfer from the heating plate (24) to the container (15) does not create a temperature in the
• the heater (10) can be used for heating liquids in a vehicle for other use than to heat the vehicle engine.
• the heater (10) can, for example, be used to heat a liquid which is heating a device in the vehicle which requires heating even when the vehicle is driven.
• the energy to the heater for example, can be taken from an energy source outside the vehicle when the vehicle is not driven and from the battery when the vehicle is driven.
• the parts for the heater are simple to manufacture and the putting together is also very simple to carry out as the three main components, the container (15), the heating plate (24) for the heating elements (23) and the cover (20), are held together by four fixing elements (22).

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Air-Conditioning For Vehicles (AREA)
• Resistance Heating (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=43243914

Family Applications (1)

Country Status (3)

Cited By (2)

Families Citing this family (4)

Citations (4)

Family Cites Families (2)

• 2009
  • 2009-08-04 SE SE0901057A patent/SE533533C2/sv unknown
• 2010
  • 2010-07-26 WO PCT/SE2010/000197 patent/WO2011016763A1/en active Application Filing
  • 2010-07-26 EP EP10806705.9A patent/EP2462339A4/de not_active Withdrawn

Patent Citations (4)

Non-Patent Citations (1)

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