EP0690269B1 - Warmwasserversorgungsgerät - Google Patents

Warmwasserversorgungsgerät Download PDF

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Publication number
EP0690269B1
EP0690269B1 EP19940401479 EP94401479A EP0690269B1 EP 0690269 B1 EP0690269 B1 EP 0690269B1 EP 19940401479 EP19940401479 EP 19940401479 EP 94401479 A EP94401479 A EP 94401479A EP 0690269 B1 EP0690269 B1 EP 0690269B1
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EP
European Patent Office
Prior art keywords
hot water
flow path
heat
section
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.)
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Application number
EP19940401479
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English (en)
French (fr)
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EP0690269A1 (de
Inventor
Noboru Maruyama
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Individual
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Individual
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Priority to EP19940401479 priority Critical patent/EP0690269B1/de
Priority to DE1994621388 priority patent/DE69421388T2/de
Publication of EP0690269A1 publication Critical patent/EP0690269A1/de
Application granted granted Critical
Publication of EP0690269B1 publication Critical patent/EP0690269B1/de
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    • 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
    • F24D17/0078—Recirculation 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
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • F24H1/28—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes
    • F24H1/287—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body including one or more furnace or fire tubes with the fire tubes arranged in line with the combustion chamber

Definitions

  • the present invention relates to a hot water supplying apparatus for houses, collective houses such as apartment houses, hotels, ordinary buildings, and other types of architecture having a number of living rooms therein such as plants.
  • FIG. 7 and Fig. 8 A known apparatus used for supplying hot water is shown in Fig. 7 and Fig. 8.
  • This apparatus has a hot water generating section 1 and a load section 2 in which a flow generating path 3 and a load flow path 4 are formed respectively.
  • An exit of the flow generating path 3 is connected to an entrance of the load flow path 4 by an outward flow path 5
  • an exit of the load flow path 4 is connected to an entrance of the flow generating path 3 by an inward flow path 6 having a circulation pump 7 to form a circulating flow path with these flow paths.
  • a water supplying path 27 having a valve 26 is connected to the inward flow path 6.
  • a plurality of heat exchangers 11'-1,2,3 (3 units in this embodiment ) each having a heater 10 therein, and heat sensors 12-1,2,3 each provided downstream therefrom in the flow generating path 3 and controlling operations of the heater 10.
  • a temperature insulating/adjusting valve 13 In the load flow path 4 in the load section 2 is provided a temperature insulating/adjusting valve 13, the upstream and downstream sections thereof and a plurality of load members 15 (2 units in this embodiment) being connected by a branch flow path 14 with a calorimeter 16 provided in an inward flow section of the branch flow path 14.
  • Fig. 8 shows details of a portion of the hot water generating section 1.
  • Each heat exchanger 11'-1,2,3 of this section 1 has a heating can 18, in which are provided a high limit sensor 17, a water supply section 21 and a hollow and cylindrical heating chamber 19' arranged therein.
  • a flame supply port 23 of the heater 10 comprising a burner is opened in a lower section of one side of the heating chamber 19' and an air exhaust port 24 is provided in the upper section of another side of said chamber.
  • An air exhaust pipe 20 connected to this air exhaust port 24, and a heat exchanging section 22 of the outward flow path 5 are located at and in the upper section of the heating can 18.
  • a hot water supplier 31 a warmer and other load equipment not shown herein respectively, while a clear water path 30 having a water cleaner 28 and a clear water pump 29 is connected to the inward flow path 6.
  • the temperature insulating/adjusting valve 13 is fully opened with the valve 26 opened to supply water via the water supply path 27 into the circulating flow path until the circulating flow path is filled with water, then the valve 26 is closed, the circulation pump 7 and the clean water pump 29 are actuated to circulate water inside said circulating flow path, and at the same time the heater 10 in each of the heat exchangers 11'-1,2,3 is actuated to start heating the water.
  • the temperature insulating/adjusting valve 13 When temperature of the water heated as described above reaches a specified level, the temperature insulating/adjusting valve 13 is once fully closed, and then the temperature insulating/adjusting valve 13 is opened to an opening degree so that temperature/pressure gauges 39, 40 located before and after the temperature insulating/adjusting valve 13 show a temperature and pressure difference and the temperature insulating/adjusting valve 13 indicates a preset minimum flow rate.
  • This operation is required for the following reasons; as circulation of hot water is necessary even in no load condition where no hot water is consumed in a load member 15 of the load section 2, and as the length of the entire circulating flow path including flow paths in the hot water generating section 1 and the load section 2 is very large, if the circulation flow rate is too high, heat loss due to heat emission to outside of the pipe increases in proportion to the circulation flow rate. For this reason also heat loss due to heat emission by hot water flowing therein becomes larger, so that a flow rate of hot water flowing during no load condition must be suppressed to as low level as possible by way of prevention of heat loss.
  • This operation is also required to generate a large pressure difference between the upstream side and the downstream side of the temperature insulating/adjusting valve 13 for the purpose to quickly supply hot water to the load member 15 in no load condition.
  • a hot water supply valve 35 connected to the hot water supplier 31 is opened and hot water is consumed, tap water is supplied from a water supply pipe 32 via a pressure switch 33, a signal from the pressure switch 33 is sent to a motor valve 34 for opening the latter, hot water is supplied to the hot water supplier 31, heat is exchanged instantly between this hot water and the supplied tap water, and hot water is supplied from the hot water supply valve 35.
  • valve 36 when the warmer is in service, the valve 36 is opened with hot water flowing thereinto, while when the warmer is not in service, the valve 36 is closed to prevent the hot water from flowing thereinto.
  • the hot water used as described above passes through the calorimeter 16, and its heat value spent in the load section 2 is detected.
  • a prescribed temperature level is fixed in each of the heat sensors 12-1,2,3.
  • the heater 10 is actuated according to a signal from the heat sensors 12-1,2,3 to heat the water supplied from the water supply section 21 into the heat exchangers 11'-1,2,3, heat exchange is performed between this heated water and the water flowing in the heat exchange section 22 in the flow generating path 3, the water in this section 22 becoming hot.
  • temperature of hot water is maintained at a prescribed level by adjusting a flow rate in the temperature insulating/adjusting valve 13, and hot water can instantly be directed into the load member 15.
  • the heat exchangers 11'-1,2,3 are located away from the circulation pump 7 by degrees, the pipe resistance becomes larger and larger, and a flow rate of hot water through the heat exchangers decreases proportionately.
  • the heat sensor 12-3 outputs a signal.
  • the signal generated by the heat sensor 12-3 is inputted into the heater 10, and the heater 10 is actuated. Consequently, the temperature of the hot water in the heating can 18 becomes abnormally high, which may cause damages to the heat exchanger 11'-3. Besides, it causes idling and troubles in the circulation pump 7, and for this reason sometimes the high limit sensor may make a decision that the temperature is abnormally high, and causes unnecessary shutdown of the heat exchanger 11'-3.
  • This apparatus comprises a common heater for heating water in two closed loop conduits, the first one being mounted between a reference level and a first set level higher by a pressure head than the reference level, whereas the second one is mounted between the reference level and a second set level higher by the pressure head than the first set level.
  • the closed loop conduits are mounted in parallel and may be therefore constructed with the same specifications. Moreover, the control of the heater is simplified.
  • the present invention was made in the light of the first hot water supplying apparatus as described above, and an object thereof is to solve the problems involved in this apparatus.
  • the flux of water flowing in the flow generating path is not limited to a minimum flow rate, no damage is given to the heat exchanger because temperature of the hot water in the heating can does not go abnormally high, and there is no need for stopping operation of the heat exchanger, which avoids unnecessary stopping, so that no trouble is generated due to idling of the circulation pump.
  • the heat exchange efficiency between the combustion gas and the liquid is improved and the temperature of the liquid is raised
  • the present invention provides a hot water supplying apparatus including a hot water generating section having a hot water generating flow path, a load section having a load flow path and a branch flow path, and a connection flow path having a circulation pump therein and connecting said hot water generating flow path to said load flow path, wherein said hot water generating section comprises heat exchangers provided in the hot water generating flow path, each heat exchanger having a heater and a heat sensor controlling the operation of the heater, said load flow path comprises a temperature insulating/adjusting valve, said branch flow path comprises a load member and connects the upstream side of said temperature insulating/adjusting valve to the downstream side thereof, and said connection flow path comprises furthermore a bypass flow path having a flux control valve connecting the upstream side of said heat exchangers to the downstream side thereof.
  • each heat exchanger comprises inside a heating chamber which has a flame supply port of the heater and is placed in the lower section of said heat exchanger in one side thereof, an exhaust port provided in the lower section of said heat exchanger in another side thereof, and an intermediate portion which connects said flame supply port with said exhaust port and has an inverted U-shaped form.
  • the present invention provides a hot water supplying apparatus wherein said flame supply port is located above the exhaust port and is sealed by the heater.
  • the circulation pump is actuated to circulate water in the circulating flow path, and at the same time the heat exchanger is actuated to heat water.
  • the temperature insulating/adjusting valve is opened to a prescribed angle so that the pressure difference between hot water before and after the temperature insulating/adjusting valve as well as temperature therein indicate a minimum flux previously prescribed, and when temperature of the water in the flow generating path goes down below the prescribed level, the heat exchanger is actuated to heat water.
  • temperature of the water in the flow generating path becomes higher than the prescribed level, operation of the heat exchanger is stopped, thus the operation for heating water being stopped.
  • the circulation pump is always working so as to circulate hot water between outward flow paths and inward flow paths as well as to make hot water flow through the bypass flow path, and with these operations flux of hot water flowing into the heat exchanger in the hot water generating section is increased.
  • combustion gas generated in the heating chamber goes up and then goes down in the heating chamber and is exhausted via the exhaust port through the exhaust pipe to the outside.
  • heat exchange is performed between the combustion gas and the liquid in the heating can on the external surface of the heating chamber, and because of this heat exchange, the combustion gas especially in the downflow section supplies heat to the liquid inside and outside thereof, the downflow flowability being raised.
  • the liquid in the heating can generates convection, going up and down in the heating can, so that the heat exchange efficiency between the combustion gas and the liquid is raised. Furthermore, the combustion gas stays inside the heat exchanger even when operation of the heat exchanger is down, which prevents permeation of cool air from outside.
  • Fig.1 and Fig.2 The embodiment of the present invention shown in Fig.1 and Fig.2 has, in most portions thereof, almost the same configuration as that of the conventional hot water supplying apparatus as described above, so that the same reference numerals are assigned to such portions, the description of which is omitted herein, and description is made mainly for the different portions.
  • a bypass flow path 8 having a flux control valve 9 connecting with the upstream side from the heat exchangers 11-1,2,3 to the downstream side therefrom.
  • the heater 10 has a flame supply port opened in the lower section in one side of the heating can, while the exhaust port 24 is provided in the lower section in another side thereof, and the intermediate section between the flame support port and the exhaust port has an inverted U-shaped form to form the heating chamber 19.
  • the circulation pump 7 is actuated to circulate water in the circulating flow path, while the heat exchangers 11-1,2,3 are actuated to heat water, and when temperature of the water heated as described above goes up to a prescribed level, the temperature insulating/adjusting valve 13 is opened to a prescribed angle, which creates a pressure difference of the hot water before and after the valve 13, and temperature in the temperature insulating/adjusting valve 13 indicates a prescribed minimum flow rate.
  • the circulation pump 7 is always working to circulate hot water through the outward flow path 5 and inward flow path 6 and also through the bypass flow path 8.
  • flux of water flown into the hot water generating section 1 increases, which in turn makes it possible to prevent heated water in the heating cans from being heated to an abnormal high degree due to shortage of the flux. For this reason, there is no possibility that any damage is given to the heat exchangers, the necessity to stop operation of the heat exchangers is eliminated when it is unnecessary, and also troubles due to idling of the circulation pump is prevented.
  • combustion gas generated in the heating chamber 19 goes up through the upflow section 41, enters the upper distribution section 43, then turns around and goes down through the downflow section 42, and is exhausted via the exhaust port 24 through the exhaust pipe to the outside.
  • the heat exchanger proposed by the present applicant and disclosed in Japanese Utility Model No.55-42216 is similar to the heat exchanger 11, but in this type of heat exchanger, a phenomenon called up/down flow of combustion gas occurs, so that description is made below for this phenomenon referring to Fig.3.
  • Fig.4 and Fig.5 show 2 other examples of the heat exchanger 11 (called Example 2 and Example 3 respectively).
  • the exhaust point D is located at a position lower by h than the heat generating point because of the architecture in which the hot water supplying point is installed as shown in Fig.6, the exhaust point D is located at a position by h lower than the heat generating point U as shown in Fig. 6.
  • the heater 10 is located at the flame supply port 23 to prevent gas distribution therethrough, so that the combustion gas stagnates inside the heating chamber 19, which prevents permeation of external cool air and maintains the internal temperature.
  • heat of hot water in the heating can 18 is emitted to outside.
  • the downflow section 42 is located outside the heating can 18 and this downflow section 42 is covered by a heat insulating material 44.
  • a flow generating path 3 in a heat generating section 1 is connected with a load flow path 4 in a load section 2 with a connection flow path, a circulating flow path having a circulation pump 7 therein is formed by these flow paths, heat exchangers 11-1,2,3 each having a heater 10 therein and a heat sensor 12 provided in flow generating path 3 and controlling operation of the heaters 10 are provided in the hot water generating section 1, a temperature insulating/adjusting valve 13 is provided in the load flow path 4, a branch flow path 14 connected with the upstream side of the temperature insulating/adjusting valve 13 and the downstream side thereof is provided in load flow path 4, a load member 15 is provided in this branch flow path, and a bypass pipe 8 having a flow rate control valve 9 and connected with the upstream side of the heat exchangers and the downstream side therefrom is provided in the connection flow path, so that flux of water flowing in flow generating path 3 is not limited to the minimum flux and any damage

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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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Claims (3)

  1. Warmwasserversorgungsgerät, umfassend eine Heißwassererzeugungssektion (1), die einen Heißwassererzeugungs-Strömungsweg (3) aufweist, eine Lastsektion (2), die einen Lastströmungsweg (4) und einen Abzweigströmungsweg (14) aufweist, und einen Verbindungsströmungsweg (5, 6), der eine darin angeordnete Zirkulationspumpe (7) aufweist und den Heißwassererzeugungs-Strömungsweg (3) mit dem Lastströmungsweg (4) verbindet, wobei die Heißwassererzeugungssektion (1) Wärmetauscher (11) enthält, die in dem Heißwassererzeugungs-Strömungsweg (3) angeordnet sind, wobei jeder Wärmetauscher (11) einen Erhitzer (10) und einen Wärmesensor (12) enthält, der den Betrieb des Erhitzers (10) steuert, wobei der Lastströmungsweg (4) ein Temperaturabsperr-/Einstellventil (13) enthält, wobei der Abzweigströmungsweg (11) ein Lastglied (15) umfaßt, und die stromaufwärts gelegene Seite des Temperatur-Absprerr-/Einstellventiles mit dessen stromabwärts gelegener Seite verbindet, und wobei der Verbindungströmungsweg (5, 6) ferner einen Beipaß-Strömungsweg (8) umfaßt, der ein Fließkontrollventil (9) enthält, welches die flußaufwärts gelegene Seite der Wärmetauscher (11) mit deren stromabwärts gelegener Seite verbindet.
  2. Warmwasserversorgungsgerät nach Anspruch 1, bei dem jeder Wärmetauscher innen eine Heizkammer (19) umfaßt, die eine Flammeneinlaßöffnung (23) des Erhitzers (10) aufweist und in der unteren Sektion des Wärmetauschers in einer Seite desselben angeordnet ist, die eine in der unteren Sektion des Wärmetauschers (11) in einer anderen Seite angeordnete Auslaßöffnung (24) aufweist und die einen mittleren Abschnitt aufweist, welcher die Flammeneinlaßöffnung (23) mit der Auslaßöffnung (24) verbindet und die eine umgekehrte U-Form aufweist.
  3. Warmwasserversorgungsgerät nach Anspruch 2, bei dem die Flammeneinlaßöffnung (23) über der Auslaßöffnung (24) angeordnet und durch den Erhitzer (10) verschlossen ist.
EP19940401479 1994-06-29 1994-06-29 Warmwasserversorgungsgerät Expired - Lifetime EP0690269B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19940401479 EP0690269B1 (de) 1994-06-29 1994-06-29 Warmwasserversorgungsgerät
DE1994621388 DE69421388T2 (de) 1994-06-29 1994-06-29 Warmwasserversorgungsgerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19940401479 EP0690269B1 (de) 1994-06-29 1994-06-29 Warmwasserversorgungsgerät

Publications (2)

Publication Number Publication Date
EP0690269A1 EP0690269A1 (de) 1996-01-03
EP0690269B1 true EP0690269B1 (de) 1999-10-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940401479 Expired - Lifetime EP0690269B1 (de) 1994-06-29 1994-06-29 Warmwasserversorgungsgerät

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EP (1) EP0690269B1 (de)
DE (1) DE69421388T2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1108960A3 (de) * 1999-12-17 2003-01-02 Noboru Maruyama Wärmeversorgungsanlage
DE202008003382U1 (de) * 2008-03-10 2008-09-25 Rösner, Egon Manfred, Dr. Dipl.-Ing. Trinkwasserbereitung mit thermischer Legionellen-Entkeimung unter Verwendung eines Strahlpumpenreglers
AU2015200017B1 (en) * 2015-01-05 2015-12-03 Rinnai Corporation Immediate hot-water supplying system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852895C2 (de) * 1978-12-07 1980-12-11 Helmut Baelz Gmbh, 7100 Heilbronn Fernwärmeübergabeanlage
DE3619217A1 (de) * 1986-06-07 1987-12-10 Vortex Gmbh Dt Vorrichtung zur regelung der zirkulation in einem temperaturbeaufschlagten, entnahmestellen aufweisenden medienkreislauf
JP2547827B2 (ja) * 1988-10-26 1996-10-23 昇 丸山 給湯システム
DE4041183A1 (de) * 1990-12-21 1992-06-25 Buderus Heiztechnik Gmbh Verfahren zum betreiben einer warmwasser-umlaufheizungsanlage

Also Published As

Publication number Publication date
DE69421388T2 (de) 2000-02-24
DE69421388D1 (de) 1999-12-02
EP0690269A1 (de) 1996-01-03

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