EP0454744B1 - Vorrichtung zur warmwasserbereitung - Google Patents

Vorrichtung zur warmwasserbereitung Download PDF

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Publication number
EP0454744B1
EP0454744B1 EP90902208A EP90902208A EP0454744B1 EP 0454744 B1 EP0454744 B1 EP 0454744B1 EP 90902208 A EP90902208 A EP 90902208A EP 90902208 A EP90902208 A EP 90902208A EP 0454744 B1 EP0454744 B1 EP 0454744B1
Authority
EP
European Patent Office
Prior art keywords
hot water
throughflow
water
openings
drinking water
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.)
Expired - Lifetime
Application number
EP90902208A
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German (de)
English (en)
French (fr)
Other versions
EP0454744A1 (de
Inventor
Volker Stragies
Karl Soffner
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Individual
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Individual
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Publication date
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Publication of EP0454744A1 publication Critical patent/EP0454744A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/087—Tap water heat exchangers specially adapted therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the water

Definitions

  • the invention relates to a device for hot water preparation in a container by heat transfer from heating water to the drinking water to be heated, wherein at least one preferably serpentine flow device connected to a drinking water pipe is arranged, the longitudinal axis of which is substantially vertical, and the flow device a vertically extending column body, which is acted upon by the heating water, is arranged within the container.
  • the required drinking water temperature in the private household for personal hygiene is just under 40 ° C and for cleaning and cleaning processes around 50 ° C. Due to these temperature specifications, storage water heaters were manufactured in which the drinking water is stored in order to be heated to the desired extent using heating coils through which heating water flows. Due to the large storage volume, the retention time of the drinking water is quite long. The flow velocities themselves are extremely low and can be of the order of 1 m / sec. Storage volume and flow rate enable it a heat stratification inside the boiler with temperatures that allow the multiplication of bacteria present in the drinking water to an extent that health risks arise.
  • Legionella pneumophila should be mentioned in particular, which show an extraordinarily high rate of reproduction at temperatures between 30 and 45 ° C, so that bacterial counts are reached which can trigger an infection.
  • the pathogens are transmitted by inhalation of respirable aerosols. It must therefore be ensured that the drinking water used does not have too many Legionella bacteria. In other words, it must be ensured that Legionella bacteria do not multiply and existing bacteria are killed to the extent necessary. This means that the water must be heated to more than 60 ° C. At the same time, it should be ensured that the water to be heated has a high flow rate, so that there are no dwell times which would favor the multiplication of the bacteria.
  • Instantaneous water heaters would meet the requirements set out above. Electric and gas water heaters are known. The instantaneous water heaters in particular enable immediate hot water delivery. As a rule, however, they are only used for kitchens or wash basins, since their use is limited due to their high connected load. With gas flow heaters, it is necessary to have a gas connection.
  • the serpentine flow device surrounds a cylinder space that is open on the head side. This enables a continuous circulation of heating water through the cylinder space, and it is not possible to collect high temperature water in the head region of the cylinder space.
  • BE-A-353 938 An arrangement similar in structure can be found in BE-A-353 938.
  • This proposal also has a continuous, a storage of heating water not enabling circulation in a cylinder space in which a serpentine flow device runs.
  • the object of the present invention is to design a device of the type mentioned at the outset in such a way that the drinking water is heated to the extent necessary so that legionella bacteria in particular are largely destroyed. Furthermore, a high flow rate should take place in the container in order to additionally ensure that bacterial growth does not occur. At the same time, the storage of large quantities of drinking water should be excluded.
  • the object is solved by the features of claim 1. Refinements result from the subclaims.
  • the teaching according to the invention ensures with simple measures that the legionella bacteria leading to the so-called legionnaires' disease do not find any area within the critical temperature range in which the drinking water is stored in large quantities.
  • Existing bacteria are killed in that the drinking water flows through a zone of the heating water, at least in the removal area, in which temperatures above 60 ° C., preferably around 80 ° C. prevail, that is to say the temperature which corresponds to the maximum temperature of the heating water.
  • a continuous-flow heater is consequently made available in which the drinking water flowing through the container is heated by the heating water stored in the container. Since the drinking water flows through the container solely within the flow device, only small amounts of drinking water are consequently obtained when drinking water is not withdrawn stored in the container. 1 to 5 l for a single or multi-family house should be sufficient. As a result, fresh water is always drawn from the smallest dispensing operations and flows through the flow device arranged in the container at a high flow rate.
  • the wall which has a hollow cylindrical geometry, furthermore ensures that strongly heated heating water is accumulated in a column, ie is stored, in which the flow device runs.
  • the wall has through-openings in order to heat the heating water present in the column to the desired temperature or to introduce heating water of the corresponding temperature into the column space.
  • guide elements such as guide plates are provided in the region of the upper edges of the passage openings, as a result of which heating water flowing on the outer surface of the wall is directed into the interior, that is to say the column region receiving the flow device.
  • the passage openings are preferably slit-shaped, with a helical course with respect to their longitudinal direction.
  • the guide elements which are designed like a helical roof, run correspondingly.
  • the flow device itself preferably consists of a pipe following a helical or helical course, which in turn runs on the circumferential surface of a cylinder element such as an empty pipe. This additionally ensures a heat concentration directly in the area of the flow device, thereby ensuring that the drinking water flowing through is heated to the required high temperature.
  • the flow-through device can be insulated in the area of the drinking water outlet opening in order to shield the high temperature against uncontrolled cooling.
  • Heating water (16) which is supplied via a line (12) by means of a pump (14) is stored in a container (10) and can optionally be supplied via lines (18) and (20) by means of pumps (22) and (24) from the top of the container ( 26) is pumped into the lower part (28) or fed to the heating circuit via an extraction line (30).
  • the heating water (16) is heated in the usual way.
  • a flow rate device (32) through which the pumps (22) and (24) can be operated to circulate the heating water (16) to lead.
  • the heating water returned to the lower part (28) can be returned to the tank (10) evenly distributed via a rake-shaped distribution element (34).
  • two serpentine flow devices (36) and (38) are arranged in the container (10), through which drinking water flows.
  • the drinking water is via a line (40) via inside the container (10) running lines (42) and (44) into the lowest point of the passage device (36) and (38), in order to then pass through the container (10.)
  • the flow device (36) and (38) runs in a columnar area (48) and (50) of the heating water.
  • the heating water in particular in the top area (26), has temperatures which correspond to the maximum heating water temperature, that is to say in the order of 80 ° C.
  • the drinking water flowing through the line (40) through the passage devices (36) and (38) has a temperature at least at the beginning of a tap process at which legionella bacteria cannot multiply.
  • larger drinking water abstraction i.e. at flow rates at which the heat stored in the container (10) is not sufficient to heat the drinking water to more than 60 ° C, there is no danger that Legionella bacteria will multiply.
  • the reason for this is that the drinking water flows through the flow device (36) or (38) at a high flow rate, thus resulting in short residence times.
  • each flow device (36), (38) is made of a body (52 ) or (54), which in turn is provided at least in the lower region (53) or (55) with through openings, which are identified by way of example with the reference numerals (56) or (58).
  • through openings which are identified by way of example with the reference numerals (56) or (58).
  • the pipe (52) or (54) points in the upper region Area (64) or (66) on the one hand has no openings and on the other hand can be isolated.
  • guide elements are arranged above the openings (56) and (58), which are identified by way of example with the reference numerals (60) and (62).
  • the guide elements (60) and (62) consequently have a roof shape, resulting in an overall helical course.
  • This configuration ensures that a heating water temperature which corresponds to the maximum temperature of the heating water supplied is set in the upper region or head region (64) or (66) inside the body (52) or (54). This in turn means that in this area the accumulated drinking water experiences a temperature at which Legionella bacteria are killed.
  • the heating water (16) is supplied via the line (12), from which, in the exemplary embodiment, pipe sections (68) and (70) protrude into the interior of the hollow cylindrical bodies (52) and (54).
  • a type of Venturi training has been chosen to enable the desired circulation. This is additionally reinforced by the fact that the pumps (22) and (24) then force the heating water circuit through the container (10) when it is indicated via the flow rate device (32) that drinking water is withdrawn, which makes it necessary for that in the columnar areas (48) and (50) heating water is heated.

Landscapes

  • 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)
  • Water Supply & Treatment (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Cookers (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Water Treatment By Sorption (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP90902208A 1989-01-21 1990-01-18 Vorrichtung zur warmwasserbereitung Expired - Lifetime EP0454744B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3901781A DE3901781A1 (de) 1989-01-21 1989-01-21 Verfahren und vorrichtung zur warmwasserbereitung
DE3901781 1989-01-21
PCT/EP1990/000094 WO1990008292A1 (de) 1989-01-21 1990-01-18 Verfahren und vorrichtung zur warmwasserbereitung

Publications (2)

Publication Number Publication Date
EP0454744A1 EP0454744A1 (de) 1991-11-06
EP0454744B1 true EP0454744B1 (de) 1995-04-19

Family

ID=6372548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90902208A Expired - Lifetime EP0454744B1 (de) 1989-01-21 1990-01-18 Vorrichtung zur warmwasserbereitung

Country Status (5)

Country Link
EP (1) EP0454744B1 (enrdf_load_stackoverflow)
AT (1) ATE121529T1 (enrdf_load_stackoverflow)
AU (1) AU4963990A (enrdf_load_stackoverflow)
DE (2) DE3901781A1 (enrdf_load_stackoverflow)
WO (1) WO1990008292A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4223070C2 (de) * 1992-03-11 1995-01-26 Hans Dr Viesmann Brauchwasserspeicher
CN105387744B (zh) * 2015-12-22 2018-01-05 华南理工大学 一种冷热分流的过程节能蓄热器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE353938A (enrdf_load_stackoverflow) *
FR1251229A (fr) * 1957-10-19 1961-01-20 Procédé d'aménagement d'échangeur de chaleur à faisceaux de tubes ou tiges chauffants et échangeur en comportant application
EP0178351B1 (en) * 1984-10-15 1988-05-04 Plaatverwerkende Industrie van Wijk en Boerma B.V. Water heating appliance e.g. a domestic boiler
DE3525990A1 (de) * 1985-07-20 1987-01-29 Buderus Ag Speicherbrauchwassererwaermer
DE8709840U1 (de) * 1987-07-17 1987-09-17 Carl Capito GmbH, 5908 Neunkirchen Heizkessel

Also Published As

Publication number Publication date
WO1990008292A1 (de) 1990-07-26
DE3901781A1 (de) 1990-07-26
ATE121529T1 (de) 1995-05-15
EP0454744A1 (de) 1991-11-06
AU4963990A (en) 1990-08-13
DE59008942D1 (de) 1995-05-24
DE3901781C2 (enrdf_load_stackoverflow) 1992-05-27

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