WO2013114846A1 - Échangeur de chaleur et procédé pour sa production, et appareil de lavage sanitaire comportant un échangeur de chaleur - Google Patents

Échangeur de chaleur et procédé pour sa production, et appareil de lavage sanitaire comportant un échangeur de chaleur Download PDF

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Publication number
WO2013114846A1
WO2013114846A1 PCT/JP2013/000415 JP2013000415W WO2013114846A1 WO 2013114846 A1 WO2013114846 A1 WO 2013114846A1 JP 2013000415 W JP2013000415 W JP 2013000415W WO 2013114846 A1 WO2013114846 A1 WO 2013114846A1
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WO
WIPO (PCT)
Prior art keywords
flow path
heat exchanger
heater
forming member
rib
Prior art date
Application number
PCT/JP2013/000415
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English (en)
Japanese (ja)
Inventor
良一 古閑
靖博 國木
Original Assignee
パナソニック株式会社
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 パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2013556255A priority Critical patent/JP5534117B2/ja
Publication of WO2013114846A1 publication Critical patent/WO2013114846A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—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
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/08—Devices in the bowl producing upwardly-directed sprays; Modifications of the bowl for use with such devices ; Bidets; Combinations of bowls with urinals or bidets; Hot-air or other devices mounted in or on the bowl, urinal or bidet for cleaning or disinfecting
    • 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
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings

Definitions

  • the present invention relates to an instantaneous heating type heat exchanger used in a sanitary washing apparatus for washing a human body part with warm water after a toilet, a manufacturing method thereof, and a sanitary washing apparatus provided with them.
  • sanitary washing devices have been equipped with a heat exchanger for making the wash water an appropriate temperature when washing the human body part after the toilet with water.
  • a heat exchanger for making the wash water an appropriate temperature when washing the human body part after the toilet with water.
  • Various types of heat exchangers have been developed, and for example, a flat plate heat exchanger is disclosed (see, for example, Patent Document 1).
  • a flat heater is housed vertically in a rectangular parallelepiped casing having a small thickness dimension, and the horizontal direction along each of the heat transfer surfaces on the front and back of the flat heater. Two flow paths are formed which meander to each other and go upward. Then, the cleaning water that flows is heated to an appropriate temperature by allowing the cleaning water to flow along each flow path while heating the flat heater. At this time, the heat exchanger disclosed in Patent Document 1 speeds up and equalizes the flow rate of the washing water by reducing the flow path cross-sectional area. Thereby, while improving the heat transfer rate to washing water, it is supposed that size reduction can be attained.
  • the maximum flow rate passing through the heat exchanger is as low as about 0.5 L / min. For this reason, there are problems such as stability of operation in the heat exchanger and adhesion of scale to the heater surface when used in a hard water area.
  • a conventional heat exchanger using a flat heater induces forced convection on the heater surface and ensures that the flow rate is maintained while flowing cleaning water uniformly over the heater surface, thereby transferring heat on the heater surface. It is configured to promote
  • the main surface which is a meandering heat exchange channel composed of the channel rib and the heater surface, and the tip of the heater surface and the channel rib (heater so as to leak from between adjacent main channels)
  • the tip of the heater surface and the channel rib (heater so as to leak from between adjacent main channels)
  • the flow path rib provided close to the flat heater is formed by injection molding of a resin material integrally with the casing of the heat exchanger. For this reason, a uniform gap cannot be formed between the tip of the flow path rib and the flat heater surface due to heat shrinkage or molding warpage during the molding of the casing. Thereby, at the time of heat exchange, since washing water flows as a leak flow through a non-uniform gap, temperature unevenness occurs on the surface of the flat heater. In addition, when the leakage flow increases, the direction of the leakage flow flows in a direction perpendicular to the main flow path direction, so bubbles generated in the main flow path do not flow out along the main flow path, and flow obstructions in the flow path. May remain.
  • the scale means a component in which components such as calcium and magnesium contained in cleaning water such as tap water are deposited and deposited as oxides, carbonates and the like, and the same applies to the following.
  • FIG. 1 is an external perspective view showing a sanitary washing apparatus including a heat exchanger according to an embodiment of the present invention.
  • the washing unit when the user operates the operation unit 6 to perform a predetermined input, the washing unit is driven and the nozzle of the washing unit has a shower-like shape with respect to the human body part.
  • the washing water is jetted.
  • FIG. 2 is a front view showing an external configuration of the heat exchanger according to the embodiment of the present invention.
  • FIG. 3 is a right side view of the heat exchanger shown in FIG. 4 is a cross-sectional view of the heat exchanger shown in FIG. 2 taken along line 4-4.
  • FIG. 5 is an enlarged cross-sectional view of a part A in FIG.
  • FIG. 6 is an exploded perspective view of the heat exchanger shown in FIG.
  • the heat exchanger 10 shown in FIG. 4 has one surface (hereinafter referred to as “first heat transfer surface”) 20 a and the other surface (hereinafter referred to as “second heat transfer surface”) of the flat heater 20. ”)" Will be described in a state where 20b is placed vertically so as to be parallel to the vertical direction, but it is needless to say that the present invention is not limited to this.
  • the vertical direction is the Z direction
  • the direction perpendicular to the Z direction and parallel to the first heat transfer surface 20a and the second heat transfer surface 20b of the flat heater 20 is the X direction
  • FIG. As shown, a direction perpendicular to both the Z direction and the X direction (direction perpendicular to the first heat transfer surface 20a) will be described as the Y direction.
  • the heat exchanger 10 of the present embodiment has a small thickness dimension (Y direction), and has a substantially rectangular (including rectangular) plate-like appearance in front view as shown in FIG. It is composed of shapes.
  • the first flow path forming member 21 includes a rectangular flat plate-like base portion 30 that faces the first heat transfer surface 20 a of the flat plate heater 20, and a flat plate shape of the base portion 30.
  • a plurality of first flow path ribs 31a formed on a surface (hereinafter referred to as “first base surface”) 30a facing the first heat transfer surface 20a of the heater 20 is provided.
  • the second flow path forming member 22 includes a rectangular flat plate-like base portion 40 facing the second heat transfer surface 20 b of the flat plate heater 20 and a second heat transfer surface 20 b of the flat plate heater 20 of the base portion 40.
  • second base surface a surface 40a (hereinafter referred to as "second base surface”.
  • the 1st flow path rib 31a and the 2nd flow path rib 31b are comprised from the base 44 and the front-end
  • a liquid such as tap water is provided in the heat exchanger 10 from a water inlet 23 a provided at the lower end of the casing 23 in the X direction and connected to an external water supply facility. Inflow.
  • the liquid that flows in from the water inlet 23a of the casing 23 mainly passes through the concave main channel 25 provided to meander.
  • the gap between the main flow paths 25 via the leak flow paths 41 formed by the gaps Hc between the upper surfaces of the tips 45 of the first flow path ribs 31a and the second flow path ribs 31b and the flat plate heater 20 is simultaneously achieved.
  • the flat heater 20 includes a ceramic base 20 k made of, for example, aluminum oxide (Al 2 O 3 ), and is composed of a ceramic heater formed by sandwiching a heating resistor.
  • the heating resistor is configured by a printing pattern 20p having a predetermined heater line width 20s formed by printing a paste containing tungsten, molybdenum, manganese, or the like.
  • a heating resistor is formed on one ceramic base 20k, and the other ceramic base is omitted. The same applies to the subsequent drawings.
  • the printed pattern 20p constituting the heater wire of the heating resistor is such that the heater wire width 20s is narrow in the portion of the flat heater 20 on the side near the water inlet 23a of the heat exchanger 10 and the side near the water outlet 23b.
  • the heater line width 20s is configured to gradually increase, for example.
  • the surface temperature of the flat heater 20 facing the main flow path 25 (side close to the outlet side flow path 25b) on the side close to the water outlet 23b of the casing 23 and the leak flow path 41 is higher than that on the side close to the water inlet 23a. High temperature.
  • the liquid contacting the first heat transfer surface 20 a and the second heat transfer surface 20 b of the flat heater 20 is already heated while flowing through the heat exchanger 10. For this reason, less heat is taken away from the surface of the flat heater 20 by the liquid. That is, the subcool value is reduced.
  • the heat generation density on the side close to the water outlet 23b is made smaller than the heat generation density on the inlet side flow path 25a side near the water inlet 23a. Therefore, the temperature of the liquid flowing through the outlet-side flow path 25b on the side close to the water outlet 23b of the heat exchanger 10 does not become high enough to cause a local boiling phenomenon.
  • the heater wire interval 20h of the printed pattern 20p having a uniform width constituting the heater wire of the heating resistor is the side closer to the water inlet 23a of the heat exchanger 10 of the flat heater 20 (for example, the lower side in FIG. 2). By making it so narrow, the heat generation density of the heating resistor is increased. On the other hand, by increasing the heater line interval 20h of the printed pattern 20p toward the side closer to the water outlet 23b (for example, the upper side in FIG. 2), the heat generation density of the heating resistor is lowered.
  • a spacer jig made of a metal material such as stainless steel is disposed or inserted so as to cover the first flow path rib 31a of the first flow path forming member 21 (step S20).
  • the spacer jig has a thickness Hc between the upper surface of the tip 45 of the first flow path rib 31a and the second flow path rib 31b and the flat heater 20 to the thickness of the flat heater 20 to be inserted later. (For example, 0.1 mm).
  • This configuration makes it possible to increase the amount of heat generated in the portion facing the channel space on the channel side close to the water inlet where the gaps between the printed pattern lines are narrow, that is, to increase the heat generation density.
  • the amount of heat generated in the portion facing the flow path space on the side close to the water outlet where the gaps between the printed pattern lines are wide can be reduced, that is, the heat generation density can be reduced.
  • the heat exchanger manufactured by the above-described heat exchanger manufacturing method is provided.
  • a sanitary washing apparatus having a heat exchanger having a small size and a stable heat exchange performance, excellent scale resistance, and a long-life heat exchanger can be produced.

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  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Epidemiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Surface Heating Bodies (AREA)

Abstract

L'invention porte sur un échangeur de chaleur, lequel échangeur comporte : une enceinte comprenant un premier élément de formation de trajectoire d'écoulement (21) et un second élément de formation de trajectoire d'écoulement (22), qui comportent des nervures de trajectoire d'écoulement sur au moins une surface de paroi interne ; et un élément chauffant en forme de plaque plate (20) renfermé à l'intérieur de l'enceinte. De plus, l'échangeur de chaleur a : des trajectoires d'écoulement principales en creux (25) formées par les nervures de trajectoire d'écoulement et l'élément chauffant en forme de plaque plate (20) ; et des trajectoires d'écoulement de fuite (41) formées par les espaces entre les surfaces supérieures des nervures de trajectoire d'écoulement et les surfaces de l'élément chauffant en forme de plaque plate (20). Les espaces des trajectoires d'écoulement de fuite (41) sont de 0,05 mm à 15 mm. Un échangeur de chaleur qui empêche la génération d'une ébullition locale d'eau de lavage au niveau des surfaces de l'élément chauffant en forme de plaque plate (20), et qui a d'excellentes performances d'échange de chaleur stables et une excellente résistance à l'entartrage, peut par conséquent être obtenu.
PCT/JP2013/000415 2012-02-03 2013-01-28 Échangeur de chaleur et procédé pour sa production, et appareil de lavage sanitaire comportant un échangeur de chaleur WO2013114846A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013556255A JP5534117B2 (ja) 2012-02-03 2013-01-28 熱交換器の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012021913 2012-02-03
JP2012-021913 2012-02-03

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WO2013114846A1 true WO2013114846A1 (fr) 2013-08-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764189A (zh) * 2015-03-30 2015-07-08 黄应林 一种电热水器
US20180080482A1 (en) * 2015-03-09 2018-03-22 Denso Corporation Ejector and ejector-type refrigeration cycle
US20190277578A1 (en) * 2018-03-07 2019-09-12 Dana Canada Corporation Heat exchangers with integrated electrical heating elements and with multiple fluid flow passages

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011027576A1 (fr) * 2009-09-07 2011-03-10 パナソニック株式会社 Echangeur de chaleur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011027576A1 (fr) * 2009-09-07 2011-03-10 パナソニック株式会社 Echangeur de chaleur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180080482A1 (en) * 2015-03-09 2018-03-22 Denso Corporation Ejector and ejector-type refrigeration cycle
CN104764189A (zh) * 2015-03-30 2015-07-08 黄应林 一种电热水器
US20190277578A1 (en) * 2018-03-07 2019-09-12 Dana Canada Corporation Heat exchangers with integrated electrical heating elements and with multiple fluid flow passages

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JPWO2013114846A1 (ja) 2015-05-11
JP5534117B2 (ja) 2014-06-25

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