WO2018164007A1 - 電気ヒータ装置 - Google Patents

電気ヒータ装置 Download PDF

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Publication number
WO2018164007A1
WO2018164007A1 PCT/JP2018/008113 JP2018008113W WO2018164007A1 WO 2018164007 A1 WO2018164007 A1 WO 2018164007A1 JP 2018008113 W JP2018008113 W JP 2018008113W WO 2018164007 A1 WO2018164007 A1 WO 2018164007A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
electric heater
heater device
heat
heat exchange
Prior art date
Application number
PCT/JP2018/008113
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
貴之 福田
Original Assignee
株式会社デンソー
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 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE112018001261.1T priority Critical patent/DE112018001261T5/de
Publication of WO2018164007A1 publication Critical patent/WO2018164007A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
    • B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H2001/00307—Component temperature regulation using a liquid flow

Definitions

  • the present disclosure relates to an electric heater device.
  • the power conversion device described in Patent Literature 1 includes a semiconductor stacked unit and a pressure member.
  • the semiconductor lamination unit is configured by alternately laminating semiconductor modules and cooling pipes for cooling the semiconductor modules.
  • the pressurizing member pressurizes the semiconductor stacked unit in the stacking direction.
  • the structure of the power conversion device described in Patent Document 1 can be applied to an electric heater device that heats water using a heating element. Specifically, if a heating element is used instead of the semiconductor module in the power conversion device described in Patent Document 1, an electric heater device that heats the water flowing inside the cooling pipe can be realized.
  • an electronic component such as a drive circuit for driving the heating element is required.
  • a cooling structure is also required.
  • a cooling structure for example, it is conceivable to employ a structure in which electronic components are arranged between the added cooling pipes after adding cooling pipes that are stacked and arranged with a predetermined gap.
  • the number of cooling pipes increases, and thus the size of the electric heater device cannot be avoided.
  • An object of the present disclosure is to provide an electric heater device that can cool an electronic component and can be miniaturized.
  • the electric heater device includes a plurality of pipes and a heating element.
  • the plurality of pipes are stacked between the inflow pipe into which the water flows in and the exhaust pipe from which the water flows out as a heat exchanging portion, with the water distributed and flowing inside, and having a predetermined gap. Yes.
  • the heating element is disposed in a gap between the plurality of pipes and generates heat based on the supply of electric power.
  • the electric heater device further includes a case and an electronic component.
  • the case has a heat exchange part and a heat generating element inside, and has a contact part that comes into contact with the outermost pipe in the stacking direction among the plurality of pipes of the heat exchange part so as to be able to conduct heat.
  • the electronic component is provided so as to be able to conduct heat with the contact portion of the case.
  • heat generated from the electronic component is transmitted to the contact portion. Since the heat exchange part is in contact with the contact part, the heat of the contact part is absorbed by the water flowing through the piping of the heat exchange part. As a result, the heat generated from the electronic component is absorbed by the water flowing through the pipe, so that the electronic component can be cooled. Also, as compared with the case of adopting a structure for cooling electronic components by providing electronic components between stacked piping, separate piping that is stacked for cooling electronic components is not required. The electric heater device can be reduced in size.
  • FIG. 1 is a plan view showing a planar structure of the electric heater device of the first embodiment.
  • FIG. 2 is a plan view showing a planar structure of the electric heater device of the first embodiment.
  • FIG. 3 is a sectional view showing a partial sectional structure taken along line III-III in FIG.
  • FIG. 4 is a flowchart illustrating a procedure of processing executed by the control device of the first embodiment.
  • FIG. 5 is a plan view showing a planar structure of an electric heater device according to a modification of the first embodiment.
  • FIG. 6 is a plan view showing a planar structure of the electric heater device of the second embodiment.
  • FIG. 7 is a plan view showing a planar structure of an electric heater device according to another embodiment.
  • the electric heater device 10 of the present embodiment shown in FIG. 1 is used as a device for raising the temperature of the heater core by electrically heating the circulating water circulating through the heater core in a vehicle air conditioner, for example. By raising the temperature of the heater core, the temperature of the air blown into the passenger compartment can be increased, so that the passenger compartment can be heated.
  • the electric heater device 10 includes a heat exchanging unit 20, a plurality of heating elements 30, a case 40, and a pressing member 50.
  • the heat exchanging unit 20 has a structure in which a plurality of flat pipes 21 through which water flows are stacked with a predetermined gap in the Y direction.
  • the Y direction is also referred to as a “pipe lamination direction”.
  • Cylindrical connecting portions 22a and 22b are formed on both side surfaces in the pipe stacking direction Y at one end in the longitudinal direction of each pipe 21, respectively. By connecting the connecting portions 22a and 22b of the adjacent pipes 21 and 21 to each other, one end portion of each pipe 21 is communicated.
  • cylindrical connecting portions 23 a and 23 b are formed on both side surfaces in the pipe stacking direction Y at the other end in the longitudinal direction of each pipe 21. By connecting the connecting portions 23a and 23b of the adjacent pipes 21 and 21, the other ends of the pipes 21 are communicated with each other.
  • connection part 22a the inflow pipe 70 is connected to the piping 21a arrange
  • the connecting portions 22b and 23b are not formed in the pipe 21b arranged at the other end portion in the pipe stacking direction Y, and the corresponding portions are closed.
  • the water flowing into the inflow pipe 70 is distributed to the inside of each pipe 21 through the connection parts 22 a and 22 b of each pipe 21. Therefore, in the heat exchange unit 20, water flows in the direction indicated by the arrow W in the drawing. The water flowing through each pipe 21 is collected at the connecting portions 23a and 23b of each pipe and then discharged from the discharge pipe 71.
  • the heating element 30 is disposed between the plurality of pipes 21 and 21.
  • the heating element 30 generates heat based on power supply. By performing heat exchange between the heat generating element 30 and the heat exchange unit 20, water flowing inside the heat exchange unit 20 is heated.
  • the case 40 is formed in a square box shape, and the heat exchange unit 20 and the heating element 30 are accommodated therein.
  • the case 40 is formed of a metal material having high thermal conductivity such as aluminum.
  • a through hole 42 into which the inflow pipe 70 is inserted and a through hole 43 into which the discharge pipe 71 is inserted are formed in the side wall 41 of the case 40.
  • the inflow pipe 70 and the discharge pipe 71 extend from the inside of the case 40 to the outside through the through holes 42 and 43.
  • the case 40 is provided with a contact portion 44 that contacts the pipe 21a of the heat exchange portion 20. That is, the contact portion 44 is in contact with one end surface of the heat exchange portion 20 in the pipe stacking direction Y.
  • the contact portion 44 is a thick portion formed so as to protrude toward the inside of the case 40 from a portion corresponding to the side wall 41 of the case 40 between the through hole 42 and the through hole 43.
  • the contact portion 44 is integrally formed with the case 40 by die casting or the like.
  • the heat exchange unit 20 is pressed against the contact portion 44 by the pressing member 50.
  • the pressing member 50 includes a spring member 51 and a plate member 52.
  • the plate member 52 is in surface contact with the pipe 21 b of the heat exchange unit 20.
  • the spring member 51 is made of a leaf spring having a shape curved in an arc shape.
  • the central portion of the spring member 51 is in contact with the plate member 52.
  • Both ends of the spring member 51 are supported by columnar fixing pins 45 a and 45 b formed integrally with the case 40.
  • the spring member 51 is inserted in a compressed state between the fixing pins 45 a and 45 b and the plate member 52. Therefore, the heat exchange unit 20 is pressed against the contact portion 44 by the elastic force applied from the spring member 51 via the plate member 52. Thereby, since the adhesiveness of the piping 21 and the heat generating element 30 is improved, the thermal conductivity between them can be improved.
  • part which the most upstream part of the flow direction W of the water in the heat exchange part 20 contacts among the parts which the heat exchange part 20 contacts in the contact part 44 is the 1st contact part P1, or A portion where the most downstream portion in the water flow direction W in the heat exchanging portion 20 contacts is shown as a second contact portion P2.
  • female screw portions 46 having female screw holes are formed.
  • Bolts for assembling an upper cover (not shown) to the case 40 are screwed into the female screw portion 46.
  • the opening of the case 40 is closed.
  • a plurality of cylindrical female screw portions 47 in which female screw holes are formed are formed inside the case 40.
  • Bolts 48 for assembling the substrate 80 shown in FIG. 2 to the case 40 are screwed into the female screw portion 47.
  • substrate 80 is arrange
  • the heating element 30 is mounted on the substrate 80.
  • the substrate 80 is mounted with electronic components such as a drive circuit for driving the heating element 30, a sensor element for detecting various state quantities of the electric heater device 10, and a control device for controlling the heating element 30. ing.
  • electronic components such as a drive circuit for driving the heating element 30, a sensor element for detecting various state quantities of the electric heater device 10, and a control device for controlling the heating element 30.
  • a switching element 81, temperature sensors 82 and 83, and a control device 84 that constitute a drive circuit are illustrated.
  • the switching element 81 is made of an IGBT, a MOSFET, or the like. In the drive circuit, the supply and stop of power to the heating element 30 can be switched by switching the switching element 81 on and off.
  • the switching element 81 and the temperature sensors 82 and 83 are thermally joined to the contact portion 44 via the heat conductive member 90.
  • the heat conductive member 90 is made of, for example, a heat conductive sheet.
  • the first temperature sensor 82 is provided in a portion of the contact portion 44 close to the first contact site P1.
  • the second temperature sensor 83 is provided in a portion of the contact portion 44 that is close to the second contact site P2.
  • heat generated from the switching element 81 is transmitted to the contact portion 44 through the heat conductive member 90. Since the pipe 21a of the heat exchange unit 20 is in contact with the contact part 44, the heat of the contact part 44 is absorbed by the water flowing through the pipe 21a of the heat exchange part 20. As a result, the heat generated from the switching element 81 is absorbed by the water flowing through the pipe 21a, so that the switching element 81 can be cooled.
  • the first temperature sensor 82 is provided in a portion of the contact portion 44 close to the first contact site P1, the temperature of the first contact site P1 or a temperature substantially equivalent thereto can be detected.
  • the first contact site P ⁇ b> 1 is a site where the most upstream portion of the heat exchange unit 20 in the water flow direction W is in contact with the heat exchange unit 20 in the contact unit 44. Therefore, the first temperature sensor 82 can detect the inflow water temperature T1, which is the temperature of the water flowing into the heat exchange unit 20.
  • the second temperature sensor 83 since the second temperature sensor 83 is provided in a portion of the contact portion 44 close to the second contact site P2, it can detect the temperature of the second contact site P2 or a temperature substantially equivalent thereto.
  • the second contact site P ⁇ b> 2 is a site where the most downstream portion of the heat exchange unit 20 in the water flow direction W is in contact with the heat exchange unit 20 in the contact unit 44. Therefore, the second temperature sensor 83 can detect the outflow water temperature T2, which is the temperature of the water flowing out from the heat exchange unit 20.
  • the control device 84 repeatedly executes the process shown in FIG. 4 at a predetermined cycle. As shown in FIG. 4, first, the control device 84 acquires information on the target water temperature T * transmitted from the host ECU as the process of step S10, and the process of the temperature sensors 82 and 83 as the process of step S11. Information on the inflow water temperature T1 and the outflow water temperature T2 is acquired based on the output signal. And the control apparatus 84 judges whether the inflow water temperature T1 is less than the protection water temperature Tth as a process of step S12 following the process of step S11. The protection water temperature Tth is determined in advance by experiments or the like so that it can be determined whether or not there is a possibility that water will boil, and is stored in the storage device of the control device 84.
  • step S12 If the determination in step S12 is negative, that is, if the inflow water temperature T1 is equal to or higher than the protection water temperature Tth, the control device 84 performs a protection process for avoiding boiling of water as the process in step S15. To do.
  • the protection process for example, the process of stopping the heating element 30 by turning off the switching element 81 and cutting off the supply of power to the heating element 30 is performed.
  • the control device 84 makes a positive determination in the process of step S12 That is, when the inflow water temperature T1 is lower than the protection water temperature Tth, it is determined in step S13 whether the outflow water temperature T2 is lower than the target water temperature T *.
  • step S13 If the determination in step S13 is affirmative, that is, if the outflow water temperature T2 is lower than the target water temperature T *, the control device 84 drives the heating element 30 as the process in step S14. Specifically, the control device 84 calculates a duty ratio based on the deviation between the target water temperature T * and the effluent water temperature T2, and controls on / off of the switching element 81 based on the calculated duty ratio. Then, the heating element 30 is driven.
  • the control device 84 once ends the series of processes after executing the process of step S14. Further, even when the control device 84 makes a negative determination in the process of step S13, that is, when the outflow water temperature T2 is equal to or higher than the target water temperature T *, the series of processes is temporarily ended. According to the electric heater device 10 of the present embodiment described above, the operations and effects shown in the following (1) to (3) can be obtained.
  • a switching element 81 is provided at the contact portion 44. Thereby, since the heat emitted from the switching element 81 is absorbed by the water in the pipe 21a through the contact portion 44, the switching element 81 can be cooled. Further, as compared with a case where a structure in which the switching element 81 is cooled by providing the switching element 81 between the stacked pipes 21 is provided, a separate pipe 21 that is stacked and arranged for cooling the switching element 81. Therefore, the electric heater device 10 can be downsized.
  • temperature sensors 82 and 83 are provided in the contact portion 44. Specifically, the first temperature sensor 82 is provided in a portion of the contact portion 44 close to the first contact site P1. Further, the second temperature sensor 83 is provided in a portion of the contact portion 44 that is close to the second contact site P2. Thereby, the temperature of the water flowing into the heat exchanging unit 20 can be detected by the first temperature sensor 82, and the temperature of the water flowing out of the heat exchanging unit 20 can be detected by the second temperature sensor 83.
  • the contact part 44 has the heat conductive member 90 in the part in which the switching element 81 and the temperature sensors 82 and 83 are provided. Therefore, since the thermal conductivity between the contact part 44 and the switching element 81 and the thermal conductivity between the contact part 44 and the temperature sensors 82 and 83 can be increased, the switching element 81 can be easily cooled. In addition, the temperature detection accuracy by the temperature sensors 82 and 83 can be increased.
  • the contact portion 44 has a heat conductive member 91 at a portion in contact with the pipe 21 a of the heat exchange portion 20.
  • the heat conductive member 91 is made of, for example, a heat conductive sheet. According to such a configuration, since the thermal conductivity between the pipe 21a and the contact portion 44 of the heat exchanging unit 20 can be increased, the switching element 81 can be further easily cooled and the temperature sensors 82 and 83 are used. The temperature detection accuracy can be further increased.
  • the contact portion 44 of this embodiment has a slit 100 formed between a portion where the switching element 81 is provided and a portion where the first temperature sensor 82 is provided.
  • a slit 101 is formed between a portion where the switching element 81 is provided and a portion where the second temperature sensor 83 is provided.
  • the slits 100 and 101 are concave grooves.
  • the slit 100 thermally separates the portion where the switching element 81 is provided from the portion where the first temperature sensor 82 is provided, so that the temperature detection accuracy by the first temperature sensor 82 is improved. Can be improved.
  • the slit 101 thermally separates the portion where the switching element 81 is provided from the portion where the second temperature sensor 83 is provided, the temperature detection accuracy by the second temperature sensor 83 is improved. Can be improved.
  • each embodiment can also be implemented with the following forms.
  • the heat conductive member 90 may be eliminated by bringing the switching element 81 and the temperature sensors 82 and 83 into contact with the contact portion 44.
  • the contact portion 44 may be provided with only one of the switching element 81 and the temperature sensors 82 and 83.
  • the contact portion 44 has a slit between the first temperature sensor 82 and the second temperature sensor 83. 102 may be formed. Thereby, the effect
  • the contact portion 44 may be provided with electronic components other than the switching element 81 and the temperature sensors 82 and 83.
  • the means and / or the function provided by the control device 84 can be provided by software stored in a substantial storage device and a computer that executes the software, software only, hardware only, or a combination thereof.
  • the controller 84 is provided by an electronic circuit that is hardware, it can be provided by a digital circuit including multiple logic circuits, or an analog circuit.

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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)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
PCT/JP2018/008113 2017-03-10 2018-03-02 電気ヒータ装置 WO2018164007A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112018001261.1T DE112018001261T5 (de) 2017-03-10 2018-03-02 Elektrische Erwärmungsvorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017046396A JP6708151B2 (ja) 2017-03-10 2017-03-10 電気ヒータ装置
JP2017-046396 2017-03-10

Publications (1)

Publication Number Publication Date
WO2018164007A1 true WO2018164007A1 (ja) 2018-09-13

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PCT/JP2018/008113 WO2018164007A1 (ja) 2017-03-10 2018-03-02 電気ヒータ装置

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JP (1) JP6708151B2 (enrdf_load_stackoverflow)
DE (1) DE112018001261T5 (enrdf_load_stackoverflow)
WO (1) WO2018164007A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019184164A (ja) 2018-04-10 2019-10-24 株式会社デンソー 電気ヒータ装置
JP2019184163A (ja) 2018-04-10 2019-10-24 株式会社デンソー 電気ヒータ装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012096779A (ja) * 2010-10-07 2012-05-24 Mitsubishi Heavy Ind Ltd 熱媒体加熱装置およびそれを備えた車両用空調装置
JP2014129090A (ja) * 2014-02-10 2014-07-10 Mitsubishi Heavy Ind Ltd 熱媒体加熱装置およびそれを用いた車両用空調装置
JP2017016817A (ja) * 2015-06-30 2017-01-19 カルソニックカンセイ株式会社 流体加熱装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6537107B2 (ja) 2015-08-25 2019-07-03 矢崎総業株式会社 電気接続箱

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012096779A (ja) * 2010-10-07 2012-05-24 Mitsubishi Heavy Ind Ltd 熱媒体加熱装置およびそれを備えた車両用空調装置
JP2014129090A (ja) * 2014-02-10 2014-07-10 Mitsubishi Heavy Ind Ltd 熱媒体加熱装置およびそれを用いた車両用空調装置
JP2017016817A (ja) * 2015-06-30 2017-01-19 カルソニックカンセイ株式会社 流体加熱装置

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Publication number Publication date
DE112018001261T5 (de) 2019-12-19
JP6708151B2 (ja) 2020-06-10
JP2018152195A (ja) 2018-09-27

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