EP4339528A1 - Elektrischer fluiderhitzer - Google Patents

Elektrischer fluiderhitzer Download PDF

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Publication number
EP4339528A1
EP4339528A1 EP22195491.0A EP22195491A EP4339528A1 EP 4339528 A1 EP4339528 A1 EP 4339528A1 EP 22195491 A EP22195491 A EP 22195491A EP 4339528 A1 EP4339528 A1 EP 4339528A1
Authority
EP
European Patent Office
Prior art keywords
plate
intermediate plate
section
fluid
heater
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.)
Pending
Application number
EP22195491.0A
Other languages
English (en)
French (fr)
Inventor
Martin MYSLIKOVJAN
Jakub ZAPOTOCKY
Laurent Decool
Pierre-Louis GAS
Serif KARAASLAN
Ales Ruzicka
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Priority to EP22195491.0A priority Critical patent/EP4339528A1/de
Priority to PCT/EP2023/075207 priority patent/WO2024056769A1/en
Publication of EP4339528A1 publication Critical patent/EP4339528A1/de
Pending 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
    • F24H1/0072—Special adaptations
    • F24H1/009—Special adaptations for vehicle systems
    • 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
    • F24H1/12—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 in which the water is kept separate from the heating medium
    • F24H1/121—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 in which the water is kept separate from 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
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • 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
    • F24H9/1827—Positive temperature coefficient [PTC] resistor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members

Definitions

  • the present invention generally relates to an electric fluid heater, more particularly to an electric fluid heater for vehicles.
  • a vehicle generally includes a heater for heating air to be supplied to a passenger compartment.
  • the heater is used to supply heated air to demist or defrost the windscreen.
  • the heater is used to supply hot air or hot coolant for cold starting the engine.
  • the heater is also applicable for battery thermal management.
  • the heaters can be used for efficient thermal management of the batteries used for powering the electric motor, thereby drastically enhancing the service life of the batteries.
  • the fluid to be heated is generally passed through a heat exchanger, which includes a heating element such as for example, heat exchange flow pipes through which a heated fluid circulates in case of thermal heater or an electrical resistive heater supplied with current.
  • the fluid to be heated circulates across the heat exchanger and extracts heat from the heating element.
  • the electrical heater includes a plurality of heating elements arranged with respect to fluid flow passes configured adjacent the heating elements between the fluid flowing through the fluid flow passes and the heating elements.
  • Each heating element includes a tube that receives electrical core therein. Specifically, the tube together with the electrical core forms the heating element.
  • Each tube may have several electrical cores, which may be arranged one after the other in a direction of the tube.
  • the electrical core may include a resistive element.
  • Each heating element includes electrodes on both sides for power supply through the heating element. Further, the heating elements include electrically insulating and thermally conductive material. The material being located between one of the electrodes and walls of the tube. In this way, the tube is electrically insulated from the electrodes and the electrical core but thermally in contact with them.
  • the housing enclosing the heating elements placed between a pair heat exchanger plates of the heat exchanger having a plate stack.
  • the plate stack are provided with an inlet port and an outlet port.
  • the ports are in fluid communication with the fluid passage formed through the plate stack.
  • the plates are arranged such that a fluid flow passage is formed around each pair of heat exchanger plates. The fluid entering the electrical heater flows from the inlet, and then passes through the fluid flow passage formed around each pair of plates. Simultaneously, the fluid extracts heat from the heating elements and egresses through the outlet.
  • this arrangement has a potential risk of formation of air pockets between the housing of the heating element and the plates, and a risk of degradation of heating element because of the insulation material filled between the heating element and the housing. Further, in this arrangement, heat transfer need to take place through two layer of plates, which includes the housing of the heating element and the heat transfer plate above the housing of the heating element. Thus, this arrangement lacks to provide efficient heat transfer between the heating element and the fluid flowing around the heat transfer plates. Consequently, overheating at any spot in heat exchanger will become difficult to detect as the heater lacks to provide efficient heat transfer.
  • some elements or parameters may be indexed, such as a first element and a second element.
  • this indexation is only meant to differentiate and name elements which are similar but not identical. No idea of priority should be inferred from such indexation, as these terms may be switched without betraying the invention. Additionally, this indexation does not imply any order in mounting or use of the elements of the invention.
  • an electric fluid heater comprising a plate stack comprising a first end plate, a second end plate, an intermediate plate stack comprising a plurality of intermediate plates arranged between the first end plate and the second end plate.
  • the second end plate formed with different portions that are in fluid communication with each other.
  • Each intermediate plate is divided into different sections, respectively, corresponding to the different portions of the second end plate.
  • the first end plate is provided with an inlet port in fluid communication with a first fluid path formed through the section of the intermediate plates and an outlet port in fluid communication with a second fluid flow path formed through the section of the intermediate plates.
  • the inlet port and the outlet port provided in a same side of the heater adapted to cause the fluid to follow a U-turn trajectory between the inlet port and the outlet port.
  • the intermediate plate stack is arranged in pairs of plate. Each pair includes a first intermediate plate and a second intermediate plate. The first intermediate plate being joined to the second intermediate plate to form an interspace therebetween to accommodate at least one heating module without welding thereto.
  • the interspace is a hollow space. In another embodiment, the interspace is a tubular space.
  • each intermediate plate comprises a first edge portion and a second edge portion opposite to that of the first edge portion.
  • the first intermediate plate comprises a depression along a length of the first and second edge portions thereof and the second intermediate plate comprises an elevation complementary to the depression along a length of the first and second edge portions thereof.
  • the depression of the first intermediate plate brought in contact with the elevation of the second intermediate plate and brazed at the contacting portions defined by the elevation and depression of the each intermediate plate pair, thereby forming the interspace therebetween.
  • the depression of the first intermediate plate divided into a first section corresponding to the first section of the plate stack and a second section corresponding to the second section of the plate stack.
  • the elevation of the second intermediate plate divided into a first section corresponding to the first section of the plate stack and a second section corresponding to the second section of the plate stack.
  • the depression has at least one of a rectangular shaped cross section and a square shaped cross section.
  • the elevation has at least one of a rectangular shaped cross section and a square shaped cross section.
  • the present invention further discloses a method for manufacturing the electric fluid heater.
  • the method comprising steps of: attaching the first intermediate plate to their adjacent second intermediate plate to form the interspace therebetween, and filling at least one heating module within the interspace without welding thereto.
  • the heating module may be filled within the interspace using thermally conductive adhesive material. The adhesive material achieves a homogeneous contact between the plates the entire heating element surface, thereby avoiding hotspots.
  • the method further comprises a step of welding a heater housing at each interspace of the plate stack, and accommodating at least one heating element within the heater housing and filling thermally conductive material between the heater housing and the heating element.
  • the electric fluid heater comprises a plate stack having a plurality of intermediate plates.
  • the plate stack provided with an inlet port and an outlet port.
  • the inlet port and the outlet port in fluid communication with a fluid passage formed through the plate stack.
  • the plate stack is arranged in pairs of intermediate plates. Each pair includes a first intermediate plate and a second intermediate plate. The first intermediate plate being joined to the second intermediate plate to form an interspace therebetween to accommodate at least one heating module without welding thereto.
  • the present invention discloses an electric fluid heater comprising a plate stack comprising a first end plate, a second end plate, an intermediate plate stack comprising a plurality of intermediate plates arranged between the first end plate and the second end plate.
  • the second end plate formed with different portions that are in fluid communication with each other.
  • Each intermediate plate is divided into different sections, respectively, corresponding to the different portions of the second end plate.
  • the first end plate is provided with an inlet port in fluid communication with a first fluid path formed through the section of the intermediate plates and an outlet port in fluid communication with a second fluid flow path formed through the section of the intermediate plates.
  • the inlet port and the outlet port provided in a same side of the heater adapted to cause the fluid to follow a U-turn trajectory between the inlet port and the outlet port.
  • the intermediate plate stack is arranged in pairs of plate. Each pair includes a first intermediate plate and a second intermediate plate. The first intermediate plate being joined to the second intermediate plate to form an interspace therebetween to accommodate at least one heating module without welding thereto.
  • This arrangement address the risk of degradation of heating elements and formation of air pockets. Further, this arrangement of the heating module in contact with the intermediate plate provides efficient heat transfer between the heating module and the fluid.
  • FIG. 1 illustrates an isometric view of an electric fluid heater 100, hereinafter referred to as fluid heater 100, in accordance with an embodiment of the present invention.
  • the fluid heater 100 comprises a plate stack 102 having a plurality of intermediate plates.
  • the plate stack 102 includes a pair of end plates 104 and 108, a plurality of heating modules 122 and a plurality of intermediate plates 112, wherein each intermediate plate 112 is formed of different sections 112A and 112B.
  • FIG. 2 illustrates an exploded view of the fluid heater 100 and the sequence in which the different elements of the fluid heater 100 are arranged and assembled with respect to each other.
  • the pair of end plates 104 and 108 include a first end plate 104 and a second end plate 108.
  • the plurality of intermediate plates 112 are arranged in pairs of intermediate plate 114, 116.
  • Each pair 114, 116 includes a first heat intermediate plate 114 and a second intermediate plate 116.
  • the first intermediate plate 114 being joined to the second intermediate plate 116 to form an interspace 136 therebetween.
  • a fluid flow path or fluid flow passes is defined adjacent to a pair of intermediate plates 114, 116 and a heating module 122.
  • Each intermediate plate 112 is formed into different sections 112A, 112B corresponding to the different portions 106A, 106B of the first end plate 104 and the different portions 110A, 110B of the second end plate 108.
  • the first sections 112A of the intermediate plates 112 defines fluidly coupled first fluid flow passes.
  • the second sections 112B of intermediate plates 112 defines fluidly coupled second fluid flow passes.
  • the first fluid flow passes are also referred as first fluid path and the second fluid flow passes are also referred as second fluid path throughout this document.
  • the first end plate 104 is defined by the opposite longer walls 124 and 126 and the pair of opposite shorter walls 128 and 130.
  • the opposite longer walls 124 and 126 are also referred to as first and second longer walls 124 and 126.
  • the opposite shorter walls 128 and 130 are also referred to as first and second shorter walls 128 and 130.
  • the opposite longer walls 124 and 126 and the opposite shorter walls 128 and 130 define the periphery of the first end plate 104 and at least a portion of the fluid flow passes corresponding to the first end plate 104.
  • the first end plate 104 includes an inlet 118 for ingress of fluid into and an outlet 120 for egress of fluid out of the fluid heater 100 from same side of the fluid heater 100 to achieve certain advantages.
  • configuring the inlet 118 and the outlet 120 on the same side of the fluid heater 100 provides compact configuration to the fluid heater 100 and addresses packaging issues. Further, such configuration also addresses routing issues associated with routing of inlet and outlet conduits connected to the inlet 118 and the outlet 120 for supplying and delivering out fluid from the fluid heater 100.
  • the second end plate 108 fluidly couples the first and the second fluid flow passes formed around adjacent the heating modules 122 and in fluid communication with the inlet 118 and the outlet 120, respectively.
  • the first end plate 104 includes a first portion 106A and a second portion 106B, wherein a groove 132 separates the first portion 106A from the second portion 106B.
  • the first portion 106A and the second portion 106B are raised portion that inherently form the groove 132 at the interface between first portion 106A and the second portion 106B.
  • the cross section of the first portion 106A is increasing from the inlet 118 towards the first fluid flow passes defined by the first sections 112A.
  • the second end plate 108 includes a first and second longer wall 176, 178, and a first and second shorter wall 180, 182.
  • the first and second longer wall 176, 178, and the first and second shorter wall 180, 182 defines the periphery of the end plate 108.
  • the second end plate 108 formed with fluidly coupled first and second portions 110A and 110B.
  • the inlet 118 and the outlet 120 on same side causes the fluid to follow a U-turn trajectory between the inlet 118 and the outlet 120.
  • the inlet 118 is disposed at the centre of the first portion 106A and proximal to the longer walls 124 of the first end plate 104. Such strategic placement of the inlet 118 ensures even distribution of the coolant to the portion of the fluid flow passes defined by the first sections 112A.
  • the second portion 106B corresponding to the second sections 112B of the intermediate plates 112 and is converging from the second sections 112B to the outlet 120 in the fluid flow direction.
  • the cross section of the second portion 106B is decreasing from the second fluid flow passes defined by the second sections 112B towards the outlet 120.
  • the outlet 120 is also disposed at the centre of the second portion 106B and proximal to the longer walls 124 of the first end plate 104.
  • the outlet 120 is disposed at the corner of the first end plate 104 defined at the intersection of the first longer wall 124 and the first shorter wall 128. Specifically, the outlet 120 is farthest from the groove 124. Such strategic placement of the outlet 120 ensures that the portion of the fluid flow passes defined by the second sections 112B of the intermediate plates 112 is filled before the fluid egresses through the outlet 120.
  • outlet 120 ensures even distribution of the coolant in the fluid flow passes defined by the second sections 112B before egressing through the outlet 120.
  • Such configuration of the outlet 120 avoids trapping air in the area beneath the second portion and the fluid flow passes defined by the second sections 112B by scavenging the fluid evenly underneath the second portion 106B of the first end plate 104.
  • the outlet 120 can be disposed horizontally instead of being disposed vertically to reduce back-pressure and improve flow path.
  • the present invention is not limited to any particular configuration of the first end plate 102 with the inlet 118 and the outlet 120 in any particular position.
  • the inlet and the outlet can be positioned on the first and the second portions so as to avoid air trapping by scavenging the fluid evenly underneath the first and second portions 106A and 106B respectively based on multiple fluid deflecting walls 134, shown in FIG.4 , formed on surface of the second end plate 108.
  • the first portion 110A and the second portion 110B of the second end plate 108 is corresponding to the first sections 112A and the second sections 112B of the intermediate plates 112 and the first portion 106A and the second portion 106B of the first end plate 104.
  • the first and the second portions 110A and 110B of the second end plates 108 are in fluid communication with each other unlike the first and second portions 106A and 106B of the first end plate 104.
  • the first fluid flow passes receive a heat exchange fluid distributed thereto by the first portion 106A of the first end plate 104 from the inlet 118 for heat exchange with at least a portion of the heating module 122 sandwiched between the intermediate plates 112.
  • the second end plate 108 fluidly couples the first fluid passes to the second fluid passes.
  • the second flow passes deliver fluid to the second portion 106B of the first end plate 104 for egress through the outlet 120 after heat exchange with the heating module 122 in the assembled configuration of the intermediate plates 112.
  • each intermediate plate 112 includes a first edge portion 140A and a second edge portion 140B opposite to that of the first edge portion 140A.
  • Each intermediate plate 112 further includes a first side portion 142A and a second side portion 142B opposite to that of the first side portion 142A.
  • the first edge portion 140A and the second edge portion 140B are the longer sidewalls of the intermediate plate 112.
  • the first side portion 142A and the second side portion 142B are the shorter sidewalls of the intermediate plate 112.
  • the longer sidewalls and the shorter sidewalls defines the periphery of the intermediate plate 112 that defines at least a portion of the fluid flow passes defined by the adjacent intermediate plates 112.
  • the first intermediate plate 114 comprises a depression 146 along a length of the first and second edge portions 140A, 140B.
  • the second intermediate plate 116 comprises an elevation 148 complementary to the depression 146 along a length of the first and second edge portions 140A, 140B thereof.
  • the depression 146 of the first intermediate plate 114 brought in contact with the elevation 148 of the second intermediate plate 116 and joined at the contacting portions defined by the elevation 148 and depression 146 of each pair of intermediate plate plates 112 to form an interspace 136 therebetween.
  • At least one heating module 122 is accommodated at the interspace 136 of each pair of intermediate plates 112.
  • the heating module 122 may include at least two sections, which corresponds to the different sections 112A, 112B of the intermediate plate 112.
  • the interspace 136 comprises a profile complementary to the profile of the heating module 122.
  • the heating module 122 is slid into the interspace 136, which accommodates the heating module 122 therein without welding.
  • the heating module 122 is slid into the interspace 136 and thermally conductive type adhesive material may be filled between the heating module 122 and the plates 112.
  • the adhesive material achieves a homogeneous contact between the plates 112 the entire heating module surface, thereby avoiding hotspots.
  • the depression 146 has at least one of a rectangular shaped cross section and a square shaped cross section.
  • the elevation 148 has at least one of a rectangular shaped cross section and a square shaped cross section.
  • the interspace 136 is a hollow space. In another embodiment, the interspace 136 is a tubular space.
  • the heating module 122 comprises a tube 166 that receives an electrical core or heating element 164 therein.
  • the electrical core 164 is for example, PTC (Positive Temperature Coefficient) resistors.
  • Each tube 166 may have several electrical cores 164, which may be arranged one after the other in a direction of the tube 166.
  • Each heating module 122 includes electrodes 168 on both sides for power supply through the heating module 122. Alternatively, the electrodes 168 may be on the same side of the heating module 122, which may reduce the number of components and packaging size.
  • the heating module 122 includes electrically insulating and thermally conductive material 170. The material 170 being located between one of the electrodes 168 and walls 172 of the tube 166. In this way, the tube 166 is electrically insulated from the electrodes 168 and the electrical core 164 but thermally in contact with them.
  • the depression 146 of the first intermediate plate 114 is divided into a first section 150A corresponding to the first section 112A of the intermediate plate 112 and a second section 150B corresponding to the second section 112B of the intermediate plate 112.
  • the elevation 148 of the second intermediate plate 116 is divided into a first section 152A corresponding to the first section 112A of the intermediate plate 112 and a second section 152B corresponding to the second section 112B of the intermediate plate 112.
  • the first edge portion 140A and the second edge portion 140B of the intermediate plates 112 are formed with slots or openings 154, 156 for either one of ingress and egress of fluid from the fluid pass defined by the adjacent pair of intermediate plates 112.
  • the openings or slots 154, 156 are formed alternately on the opposite longer walls or edge portions 140A, 140B of each pair of the adjacent intermediate plates 112 to define zig-zag fluid flow path between the inlet 118 and the outlet 120 and permit fluid communication between the fluid flow passes defined by the adjacent intermediate plates 112.
  • the zig-zag fluid flow path between the inlet 118 and the outlet 120 increases the length of the fluid flow path and accordingly enhances the contact area and contact time between the fluid flowing through the fluid flow passes and the heating element 122, thereby improving the efficiency and performance of the fluid heater 100
  • the openings or slots 154 are formed on the first intermediate plates 114 at portions thereof proximal to the edge portions 140A, 140B, then, the corresponding openings or slots 156 are formed on the subsequent adjacent intermediate plates 112 or the second intermediate plate 116 at edge portions 140A, 140B.
  • each intermediate plate 112 specifically, the first intermediate plate 114 includes at least one of first positioning elements 158A, 158B in the form of guiding pins 158A, 158B and corresponding second positioning elements 160A, 160B in the form of guiding holes 160A, 160B.
  • the guiding pins 158A, 158B formed on the first intermediate plate 146 engages with the corresponding guiding holes 160A, 160B of the adjacent intermediate plate 116 to position and assemble the intermediate plate 112 with respect to the adjacent intermediate plate112.
  • each guiding pin 158B there are two guiding pins 158B along the portion of the second intermediate plate 116 proximal to the second edge portion 140B.
  • Each guiding pin 158A, 158B disposed on the respective portions of the intermediate plate 114 corresponding to the two sections 112A, 112B of the intermediate plate 114.
  • each guiding hole 160A disposed on the respective portions of the second intermediate plate 116 corresponding to the two sections 112A, 112B of the intermediate plate 116.
  • Each guiding hole 160B disposed on the respective portions of the second intermediate plate 116 corresponding to the two sections 112A, 112B of the intermediate plate 116.
  • each intermediate plate 112 includes at least one rib 162.
  • the at least one rib 162 defines the different sections 112A, 112B of the intermediate plate 112.
  • the ribs 162 of the adjacent intermediate plates 112 acts as poke - yoke feature and facilitates in correct assembly between the adjacent intermediate plates 112.
  • the present invention further discloses a method for manufacturing the electric fluid heater 100.
  • the method comprising steps of: attaching the first intermediate plate 114 to their adjacent second intermediate plate 116 to form the interspace 136 therebetween, and filling at least one heating module 122 within the interspace 136 without welding thereto.
  • the method further comprises a step of: filling at least one heating module 122 within the interspace 136 with thermally conductive type adhesive material.
  • the adhesive material achieves a homogeneous contact between the plates 112 the entire heating module surface, thereby avoiding hotspots.
  • the method further comprises a step of welding a heater housing 166 (also referred as tube 166 throughout the document) at each interspace 136 of the plate stack 102, and accommodating at least one heating element 164 (also referred as electrical core 164) within the heater housing 166 and filling thermally conductive insulation material between the heater housing 166 and the heating element 164.
  • a heater housing 166 also referred as tube 166 throughout the document
  • at least one heating element 164 also referred as electrical core 164
  • the electric fluid heater 100 comprises a plate stack 102 having a plurality of intermediate plates.
  • the plate stack 102 provided with an inlet port 118 and an outlet port 120.
  • the inlet port 118 and the outlet port 120 in fluid communication with a fluid passage formed through the plate stack 102.
  • the plate stack 102 is arranged in pairs of intermediate plates 102. Each pair includes a first intermediate plate 114 and a second intermediate plate 116.
  • the first intermediate plate 114 being joined to the second intermediate plate 116 to form an interspace 136 therebetween to accommodate at least one heating module 122 without welding thereto.
  • the heating modules are assembled to the heater by brazing at high temperature, which may affect the heating element insulation material. Therefore, the present invention facilitates the arrangement of heating module 122 by sliding the heating module 122 between plates 112.
  • the heating module 122 may be slid in between plates 112 and thermally conductive type of adhesive may be filled between the plates 112 and the heating module 122.
  • the heater 100 further facilitates early overheating detection due to the short heat transfer path offered by the multiple plates 112 in contact with the heating module 122. Further, the heater 100 design may be reduced or increased on all three axis based on customer power demands. Furthermore, the heater 100 further provides efficient heat transfer due to the large contact area between the heating element and the coolant and long flow path between the inlet 118 and the outlet 120.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
EP22195491.0A 2022-09-14 2022-09-14 Elektrischer fluiderhitzer Pending EP4339528A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22195491.0A EP4339528A1 (de) 2022-09-14 2022-09-14 Elektrischer fluiderhitzer
PCT/EP2023/075207 WO2024056769A1 (en) 2022-09-14 2023-09-14 Electric fluid heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22195491.0A EP4339528A1 (de) 2022-09-14 2022-09-14 Elektrischer fluiderhitzer

Publications (1)

Publication Number Publication Date
EP4339528A1 true EP4339528A1 (de) 2024-03-20

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EP22195491.0A Pending EP4339528A1 (de) 2022-09-14 2022-09-14 Elektrischer fluiderhitzer

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EP (1) EP4339528A1 (de)
WO (1) WO2024056769A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013087671A1 (de) * 2011-12-15 2013-06-20 Behr Gmbh & Co. Kg Elektrisch betreibbares heizgerät
US20140050465A1 (en) * 2011-09-28 2014-02-20 Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. Heat medium heating device and vehicular air-conditioning device including the same
US20200079180A1 (en) * 2018-09-11 2020-03-12 Mahle International Gmbh Electric heating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140050465A1 (en) * 2011-09-28 2014-02-20 Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. Heat medium heating device and vehicular air-conditioning device including the same
WO2013087671A1 (de) * 2011-12-15 2013-06-20 Behr Gmbh & Co. Kg Elektrisch betreibbares heizgerät
US20200079180A1 (en) * 2018-09-11 2020-03-12 Mahle International Gmbh Electric heating device

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