EP0429450A1 - Gasbeheizter durchlauf-wassererhitzer. - Google Patents
Gasbeheizter durchlauf-wassererhitzer.Info
- Publication number
- EP0429450A1 EP0429450A1 EP19890903459 EP89903459A EP0429450A1 EP 0429450 A1 EP0429450 A1 EP 0429450A1 EP 19890903459 EP19890903459 EP 19890903459 EP 89903459 A EP89903459 A EP 89903459A EP 0429450 A1 EP0429450 A1 EP 0429450A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- control valve
- valve
- flow switch
- water 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000012528 membrane Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/16—Fuel valves variable flow or proportional valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/18—Groups of two or more valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/20—Membrane valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/24—Valve details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/20—Controlling one or more bypass conduits
Definitions
- the invention is based on a gas-heated once-through water heater according to the type of the main claim.
- the actuator of the flow switch acts on a control valve in a bypass channel to the venturi, which is arranged in addition to the bypass channel containing the manual control valve.
- the control valve ensures that the maximum temperature increase matched to a predetermined nominal output and a predetermined nominal water quantity of the device is not exceeded even if the nozzle valve is only opened to such an extent that the water throughput remains below the nominal water quantity.
- the control valve only fulfills this function of keeping the temperature constant if the manual control valve in the second bypass line is closed and the device delivers hot water with the greatest possible temperature increase.
- control valve is then no longer able to maintain the preselected lower outlet temperature if the water throughput through the device is also caused by only partially opening the dispensing valve is throttled.
- the arrangement according to the invention with the characterizing features of the main claim has the advantage, in contrast, that the water outlet temperature not only in the case of hot water tapping, but also when tapping water of lower temperature (hot water) at least approximately the temperature value preselected or set via the manual control valve maintains when the water throughput via the nozzle valve is limited to a value which lies between the minimum amount of water which triggers the flow switch and the maximum amount of high water corresponding to the respective temperature selection.
- the control element provided for constant hot water temperature can, for example according to DE-Al 23 30 486, be a control pin protruding into the narrowest cross section of the Venturi.
- a second control valve serving to maintain the hot water temperature it is advantageous for the parts to be mutually coordinated if the venturi is bridged by two bypass channels, one of which via the manual control valve and the control valve for hot water temperature influenced by the flow switch ⁇ door constancy, whereas the other bypass duct contains a control valve for hot water temperature constancy influenced by the flow switch.
- the invention further provides that at least the control Valve for hot water temperature constancy and the gas valve are designed and matched to one another in such a way that, after a linear part of the stroke characteristic of the flow switch, the gas supply no longer or does not increase above a predetermined maximum value is connected.
- the movable valve member of the control valve for constant hot water temperature can have a throttle pin projecting axially into the valve opening of the control valve, which tapers towards its free end and carries a throttle collar with an enlarged diameter there.
- valve opening of at least one control valve is formed on a socket inserted into the bypass duct, the position of which relative to the movable valve member can be set within predetermined limits.
- a water quantity regulator or limiter influenced by its actuator can be provided in the water inlet to the high pressure chamber of the flow switch.
- FIG. 1 shows a schematic overall representation of a gas-heated device for preparing hot or warm process water with a so-called water fitting in section
- FIG. 2 shows a partial section through the water fitting according to FIG. 1 on an enlarged scale compared to FIG. 1
- FIG. 3 shows a variant of a functional part 4 shows a functional diagram of the device according to FIGS. 1-3.
- the device has a water flow line 10, which leads from a water inlet 12 via a water fitting provided as a whole with the reference number 14 and a heat exchanger 16 to a water outlet 18 or a nozzle 20.
- a combustion shaft (not shown) is arranged beneath the heat exchanger 16 in a combustion shaft (not shown) which is fed from a gas line 24 which is provided with a gas valve 26.
- This has a closing member 28, which is pressed by a closing spring 30 against a valve seat at the valve opening and is provided with a conically tapering control shoulder 32 projecting into it.
- the control attachment 32 is designed such that there is a linear dependence of the gas throughput on the stroke of the closing member 28.
- the water fitting 14 contains a flow switch 34 which serves as a low water protection device and which has a high-pressure chamber 36 and a low-pressure chamber 38 which are tightly separated from one another by a piston member 40.
- a piston member 40 This consists of a membrane 42 (FIG. 2) and a rigid support plate 44 to which the membrane 42 is held by means of molded pins 46.
- the piston member 40 is also fixedly connected to a valve lifter 48, which seals is led out of the low pressure chamber 38 and together with the piston member 40 forms a hydraulic actuator for the gas valve 26.
- the water inlet 12 is connected to a chamber 52 in the water fitting 34 which accommodates a water quantity regulator or limiter 50 and from which a regulating passage 54 leads into the high pressure chamber 36.
- the water quantity controller 50 which is shown in the control position in FIG. 2, has a control piston 56, which is pressed upwards by a control spring 58 against the piston member 40.
- the regulating piston 56 has a regulating cone 60 which, in cooperation with a regulating edge 62 at the regulating passage 54, controls or regulates the flow of water into the high-pressure chamber 36.
- the control cone 60 is adjoined at the bottom by a sleeve-shaped extension 63 which is displaceably mounted in a closure part 64 screwed into the fitting housing and which accommodates the control spring 58 in its central bore 66, which is supported at the bottom on the closure part 64.
- the bore 66 is connected via channels 67, 68 in the control piston 56 to the part of the chamber 52 above the control cone 60.
- a channel 70 leads from the high-pressure chamber 36 to an outlet 72 of the water fitting, in which a venturi 74 is installed.
- the narrowest point of the Venturi 74 is connected to the low-pressure chamber 38 via a narrow bore 76.
- Two bypass passages 78 and 80, which bypass the Venturi 74, also branch off from the high-pressure chamber 36, both of which open into the passage 70 downstream of the Venturi 74.
- Both bypass channels 78, 80 are each provided with a control valve 82 and 84, the structure and function of which is described in more detail below.
- a manual control valve 86 is also installed, which has the function of a temperature selector for the tap water in a known manner.
- the control valve 82 has a throttle pin 90 projecting coaxially into the mouth area 88 of the bypass channel 78, which is fixedly connected to the carrier plate 44 of the piston member 40.
- the throttle pin 90 has a conically tapering central section 92, the initial area of which is larger in diameter
- the rest position of the piston member 40 projects into a valve opening 94 of the control valve 82.
- the throttle pin 90 is provided with a throttle collar 96 which is enlarged in diameter and which is located in the stroke end position of the piston member 40 in the valve opening 94 shown in the right in FIG. 2 and determined by the control position of the water quantity regulator 50, and the passage cross section of which is considerable throttles.
- the valve opening 94 is formed on a bushing 98, which is mounted displaceably in the mouth region 88 of the bypass channel 78 and whose axial position can be set within predetermined limits by an adjusting device 100.
- the adjusting device 100 has an adjusting pin 104 which is rotatably mounted in the armature housing and is provided with a screw head 102 and which carries an eccentric bolt 106 at the inner end which engages in a recess on the circumference of the bush 98.
- the screw head 102 is provided with a transverse slot 108 for the insertion of a tool for turning the setting pin 104, the bearing points of which are sealed by O-rings 110 and 112 and which is fixed in the set position by a clamping screw 113 pressing against the screw head 102 .
- the control valve 84 of the bypass channel 80 leading via the manual control valve 86 also has a conically tapering throttle pin 114 fastened to the piston member 40, which is arranged coaxially with a mouth region 116 of the bypass channel 80 and one Passage cross section controls according to the stroke position of the piston member 40.
- the valve opening of the control valve 84 can be arranged analogously to the control valve 82 on an axially adjustable bushing in the mouth area 116 of the bypass channel 80.
- the throttle pin according to FIG. 3 can also be formed by a shape 114a in the carrier plate 44a.
- the water quantity regulator 50 can be removed by loosening the closure part 64 to the outside.
- a thin-walled flange collar 120 is provided on this, which is initially parallel to the controller axis and, after the sleeve-shaped extension 63 of the control piston 56 has been pushed through, is folded inwards becomes.
- a pressure relief valve 122 is also installed in the closure part 64, the closing force of which can be adjusted from the outside by turning a screw plug 124 supporting the closing spring.
- the actuating stroke h of the flow switch 34 and the temperature increase Delta t are plotted against the passage quantity Q of the water related to the time unit.
- the manual control valve 86 When the manual control valve 86 is closed (hot water preparation), the flow switch 34 responds at a water flow of approximately 1.8 l / min, lifting the closing element 28 of the gas valve 26 from its seat.
- the actuating stroke h increases linearly along line a until the flow quantity Q approximately reaches the control value of set by the water quantity controller 50. has reached approx. 7.5 1 / min.
- the opening stroke of the gas valve closing element 28 also increases linearly with the flow rate Q.
- the control approach 32 on the closing member 28 ensures that the amount of gas supplied to the burner 22 increases linearly with the flow rate Q of the water and vice versa.
- the temperature of the tap water is already approximately the prescribed amount from the minimum amount required to open the gas valve 26 of about 1.8 1 / min to the control amount of about 7.5 1 / min
- the temperature profile of the drawn hot water is represented by line b, according to which an outlet temperature of approx. 60 ⁇ C results when the water inlet temperature is assumed to be 10 ⁇ C.
- the actual characteristic curve of the actuating stroke h in a preset device will lie in a range of dispersion, which is indicated in the functional diagram by the two limiting characteristic curves a and a_. Accordingly, the actual course of the temperature increase becomes delta t lie above the flow rate Q in a range defined by the two limit characteristics b. and b is indicated.
- the characteristic curves can be brought into the center of the scattering ranges by corresponding axial adjustment of the bushing 98 of the control valve 82, as shown in the functional diagram, where the temperature curve b approximates the most straight line.
- the throttle collar 96 on the throttle pin 90 enters the valve opening 94, after which the disproportionate effect of the Venturi 74 comes into play fully and the piston member 40 of the flow switch 34 already at one minimal further increase in the water throughput reaches the stroke position corresponding to the control position of the water quantity regulator 50.
- the arrangement is such that the gas valve 26 is already fully open when the throttle collar 96 takes effect, so that the full output of the burner 22 is achieved with certainty.
- the user wants to tap water with a lower outlet temperature than 60 ° C or a lower temperature increase than 50 ° K, he opens the bypass channel 80 accordingly via the manual control valve 86.
- the conditions are shown in the functional diagram when the manual control valve 86 is fully open. It is initially assumed that the bypass channel 80, as in the prior art, is only monitored by the manual control valve 86 and the control valve 84 provided according to the invention is missing in the bypass channel 80. Then the flow switch 34 would only be at a flow rate of approximately 6 l / min. respond and open the gas valve 26. Thereafter, the actuating stroke h would increase with a further increase in the flow rate Q according to the characteristic curve d and a course of the temperature increase Delta t would result according to the characteristic curve e.
- the characteristic curve e makes it clear that when dispensing hot water, the outlet temperature of which depends to a considerable extent on the flow rate based on the time unit, if the manual control valve 86 is not assigned any adjustment stroke-dependent correction means.
- the bypass channel 80 is initially throttled considerably by the control valve 84 when the nozzle 20 is opened, as can easily be seen in FIG.
- the response point of the flow switch 34 is brought forward to a flow rate of approximately 3.7 l / min.
- the actuating stroke h of the flow switch 34 in accordance with characteristic curve f again increases substantially linearly until it changes into a steeper branch g when the throttle collar 96 on the throttle pin 90 enters the valve opening 94.
- the two control valves 82 and 84 are so matched to one another and to the gas valve 26 or its closing member 28 that practically already from the minimum flow rate of approx. 3.7 l / min up to the maximum flow rate of approx. 11 limited by the water quantity controller 50 1 / min, the gas supply to the water throughput increases approximately proportionally and vice versa, so that, according to characteristic curve i, the temperature increase Delta t is approximately constant.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Fluid-Driven Valves (AREA)
- Feeding And Controlling Fuel (AREA)
- Multiple-Way Valves (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3810836A DE3810836A1 (de) | 1988-03-30 | 1988-03-30 | Gasbeheizter durchlauf-wassererhitzer |
DE3810836 | 1988-03-30 | ||
PCT/DE1989/000180 WO1989009367A1 (en) | 1988-03-30 | 1989-03-22 | Gas-fired instantaneous water heater |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0429450A1 true EP0429450A1 (de) | 1991-06-05 |
EP0429450B1 EP0429450B1 (de) | 1995-06-21 |
Family
ID=6351091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89903459A Expired - Lifetime EP0429450B1 (de) | 1988-03-30 | 1989-03-22 | Gasbeheizter durchlauf-wassererhitzer |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0429450B1 (de) |
KR (1) | KR900700826A (de) |
AU (1) | AU3282589A (de) |
DE (2) | DE3810836A1 (de) |
ES (1) | ES2013131A6 (de) |
PT (1) | PT90155B (de) |
WO (1) | WO1989009367A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0198327A2 (de) * | 1985-04-03 | 1986-10-22 | The Green Cross Corporation | Verfahren zum selbsttätigen Nachweis von Gewinnungsreaktionen und Vorrichtung zu diesem Zweck |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2065804B1 (es) * | 1992-02-27 | 1997-04-16 | Fagor S Coop | Mejoras introducidas en calentadores instantaneos de agua a gas. |
EP1852654A3 (de) * | 2006-05-03 | 2015-11-04 | Vaillant GmbH | Wasserschalter für Gaswasserheizer |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1194753A (fr) * | 1957-05-31 | 1959-11-12 | Vaillant Joh Kg | Chauffe-eau instantané avec régulateur de débit à membrane |
FR76864E (fr) * | 1959-09-29 | 1961-12-15 | Vaillant Joh Kg | Chauffe-eau instantané avec régulateur de débit à membrane |
DE1171138B (de) * | 1960-07-16 | 1964-05-27 | Godesia Werk Badeapp Und Metal | Wassermangelsicherung fuer Durchlauferhitzer |
FR92079E (fr) * | 1967-03-17 | 1968-09-20 | Chaffoteaux Et Maury | Perfectionnements aux chauffe-eau |
DE1679694A1 (de) * | 1967-10-20 | 1971-04-08 | Junkers & Co | Gasbeheizter Durchlauf-Wassererhitzer mit einer Wassermangelsicherung |
BE794663A (fr) * | 1972-06-26 | 1973-07-30 | Leblanc Sa | Perfectionnement a l'allumage des bruleurs d'appareils a gaz, tels que chauffe-eau, chauffe-bains, chaudieres de chauffage central, radiateurs a gaz et analogues |
DE2330486A1 (de) * | 1973-06-15 | 1975-01-16 | Junkers & Co | Gasbeheizter wassererhitzer, insbesondere durchlauf-wassererhitzer |
FR2373004A1 (fr) * | 1976-12-03 | 1978-06-30 | Saunier Duval | Dispositif de reglage du petit debit d'une electrovalve pour appareils du genre chaudiere a gaz |
FR2541434B1 (fr) * | 1983-02-23 | 1987-01-30 | Vaillant Sarl | Chauffe-eau instantane a gaz |
-
1988
- 1988-03-30 DE DE3810836A patent/DE3810836A1/de not_active Ceased
-
1989
- 1989-03-22 EP EP89903459A patent/EP0429450B1/de not_active Expired - Lifetime
- 1989-03-22 WO PCT/DE1989/000180 patent/WO1989009367A1/de active IP Right Grant
- 1989-03-22 KR KR1019890702196A patent/KR900700826A/ko not_active Application Discontinuation
- 1989-03-22 AU AU32825/89A patent/AU3282589A/en not_active Abandoned
- 1989-03-22 DE DE58909312T patent/DE58909312D1/de not_active Expired - Lifetime
- 1989-03-29 PT PT90155A patent/PT90155B/pt not_active IP Right Cessation
- 1989-03-30 ES ES8901117A patent/ES2013131A6/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8909367A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0198327A2 (de) * | 1985-04-03 | 1986-10-22 | The Green Cross Corporation | Verfahren zum selbsttätigen Nachweis von Gewinnungsreaktionen und Vorrichtung zu diesem Zweck |
EP0198327A3 (en) * | 1985-04-03 | 1989-08-23 | Green Cross Corporation | Method of automatically detecting agglutination reaction and apparatus therefor |
Also Published As
Publication number | Publication date |
---|---|
AU3282589A (en) | 1989-10-16 |
EP0429450B1 (de) | 1995-06-21 |
ES2013131A6 (es) | 1990-04-16 |
DE58909312D1 (de) | 1995-07-27 |
DE3810836A1 (de) | 1989-10-12 |
PT90155B (pt) | 1994-05-31 |
PT90155A (pt) | 1989-11-10 |
WO1989009367A1 (en) | 1989-10-05 |
KR900700826A (ko) | 1990-08-17 |
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