ES2201799T3 - LOW VOLUME CONTINUOUS FLOW APPLIANCE FOR DRINKING WATER HEATING. - Google Patents

Abstract

Small volume continuous flow apparatus for heating potable water, in particular for installation in and interconnection with continuous flow gas heaters, consisting of a tank (1) with cold water supply connections and hot water outlet ( 2, 3) and with heating water outlet and heating water return connections (4, 5), for which purpose the tank (1) is configured with separation walls (6) to form a plate heat exchanger and the separation walls (6) alternately and consecutively limit interstices (7, 8) conductors of drinking water and heating water, characterized in that the part of the reservoir (1¿) of the reservoir (1) of the outlet side of the current of Hot water is sized with a smaller volume than the part of the tank (1¿) of the tank (1) on the inlet side of the cold water stream, because the cold water connections and hot water outlet (2, 3 ) Y outlet connections of the heating water and return of the heating water (4, 5) are arranged in each case in the other part of the tank (1 ¿, 1¿¿), for which purpose the separation walls (6) arranged in the part of the smaller tank (1¿), considered from the point of view of the difference of the surfaces, has a greater heat transmission with respect to the separation walls (6) in the other part of the tank (1¿¿) , and because the interstices (7, 8) are each connected in such a way that in the parts of the tank (1 ¿, 1¿¿) there is an interconnection in a continuous flow and / or countercurrent flow with with respect to the two means of flow.

Description

Low volume continuous flow apparatus for Drinking water heating.

The invention relates to a flow apparatus low volume continuous for the heating of drinking water, in particular for installation in and for interconnection with continuous flow gas heaters, according to the statement of the patent claim 1.

Continuous flow devices of the aforementioned type are known for example of the request WO-A-92/11501, namely in the form of plate heat exchangers with a configuration oriented on the sense, that two or more of these plate heat exchangers can be coupled directly to each other in order to increase the heat changing surface. It is also known, the combine this type of continuous flow apparatus with gas heaters continuous flow (see for example the patent EP-A-0427121 A2) or interconnect hydraulically these. The drawback in such heaters of combined water, to which it is usually connected also a heating circuit, is that after taking the relatively small volume of stored drinking water, it observe a sensitive "fall" in the outlet temperature of the hot water, that is, under certain service conditions (for example progressive service form - summer regime) to start the shot the water temperature of heating required for heating the use water comfortable.

The invention is therefore committed to create a continuous flow device that does not present this inconvenient, that is, starting from a flow device continuous of the type initially mentioned, with a construction form compact, it must be modified and improved in a simple way such a way that the said "fall" of the outlet temperature of hot water is avoided or at least decreased so considerable.

This task is solved by a device of continuous flow of the type initially cited according to the invention by means of the characteristics outlined in the distinctive part of the patent claim 1. Advantageous improvements result according to subordinate claims 2 to 7 of the patent.

This configuration according to the invention means, that the tank part of the outlet side of the water stream hot works with a high degree of performance in what is refers to the heat transmission and the part of the tank on the side of cold water stream input as "accumulator" with a lower degree of performance, to which end primarily with a relatively small total hydraulic volume of the flow apparatus continuous the total content of the drinking water side is dimensioned with a maximum of 3 liters and distributed in such a way, that the "accumulator" can accommodate a volume of drinking water greater than the part of the tank on the output side of the current of hot water. This division is then sufficient, as to bypass the "dead time" during the shot that as already cited, occurs when it is unavailable Immediate heating water temperature required.

This solution according to the invention is therefore not limited to measures known from the point of view of the regulation and control technique for the provision of water for comfortable use in the above sense (see also in this regard the patent
EP-A-0427121 A2), but is applied even by the configuration corresponding to the continuous flow apparatus itself, that is to say that periodically the accumulator greater from the point of view of the volume is maintained at the disposition temperature by heat supply.

The high degree of performance in the part of the reservoir on the outlet side of the hot water stream is achieved to this end by a special configuration of the walls of separation and with it the width of the interstices and on the other part preferably in combination with a conduction in countercurrent in this part of the deposit, which is still explained in more detail.

Regardless of the extent to which cited cold water and hot water connections and also the heating water outlet and return water connections heating must be arranged "in each case elsewhere in the tank ", all these connections are preferably arranged in the same side of the continuous flow apparatus, in order to simplify its full connection

The continuous flow apparatus according to the invention and its advantageous embodiments and refinements Preferred are explained in more detail below by of the graphic representation of embodiments.

Show

Figure 1 in perspective and schematically the internal division of the continuous flow apparatus by means of walls separation including preferred flow lines

Figure 2 schematically the scheme of interconnection of the continuous flow apparatus in a form of preferred embodiment with unilateral provision of all connections

Figure 3 in section a part of the tank with a special embodiment of the walls of separation

Figure 3A schematically another form of interstices configuration completion

Figure 3B in perspective the form of preferred embodiment of the separation walls

Figure 4 in perspective the flow apparatus continuous in an exterior view, and

Figure 5 the device connection scheme continuous flow in combination with a heat generator and the corresponding heating circuit.

In figures 1 to 5 they are defined with the symbols corresponding reference all the corresponding elements each other, i.e. the deposit with 1, its deposit elements that they structure it with 1 ', 1' ', the water supply connection cold with 2, the hot water outlet connection with 3 and the heating water outlet and return water connections heating with 4 and 5.

In figure 5, a generator of heat (continuous flow gas heater) with WE, the circuit heating connected to it with HK and the continuous flow device as a compact construction unit composed of both parts of the 1 ', 1' 'tank with DG.

For all embodiments represented, regardless of the different possibilities of represented interconnection is essential, the element of tank 1 'of tank 1 on the output side of the current hot water is sized with a volume smaller than the part of tank 1 '' of tank 1 on the inlet side of the cold water stream, which cold water inlet connections and hot water outlet connections 2, 3 and outlet connections of heating water and return of heating water 4, 5, se they are arranged each in the other part of the tank 1 ', 1 '', to which end the separation walls 6 arranged in the part of the smaller 1 'tank, considered from the point of view of the difference of the surfaces, they present a heat transmission greater with respect to the separation walls 6 in the other part of the tank 1 '', and that the interstices 7, 8 are joined in each case with each other in such a way that in the parts of the tank 1 ', 1' ' there is an interconnection in continuous flow regime and / or in countercurrent with respect to the two flow means.

The fundamental thing is to this end too, that under consideration of a loss of top load, the walls of separation 6 in the part of the minor deposit, considered from the point of view of the difference of the surfaces, they present a heat transmission greater than those of the tank part 1 '' more big.

In the schematic representation according to the figure 1 the separation walls 6 are represented extremely distanced from each other solely for reasons of a greater clarity, that is to say the separation walls 6 that limit the interstices 7, 8 have a distance of the order of magnitude of only 2-10 mm approximately, while the interstices 7, 8 contrary to the representation in figure 1, in the part of the tank 1 'they remain narrower than in the another part of the 1 '' tank. They also have to imagine the interstices 7, 8 including inversion chamber 9 as is natural closed out, as is shown in figure 4.

The heating water line is represents to this end in line of strokes and points and driving drinking water in dashed lines and in each case using arrows direction, to which end, what as a result of the arrows indications of the address does not require further explanation detailed, it is the preferential interconnection of interstices 7, 8, namely in continuous flow regime in the part of the 1 '' tank and in countercurrent regime in the part of the 1 'tank.

In the interconnection scheme according to figure 2 the heating return HR and the cold water inlet KW are are arranged on the same side as the HV heating outlet and hot water outlet in the continuous flow apparatus, in order to, As initially mentioned, get connection possibilities more comfortable Keeping in the connection scheme according to the Figure 1, however, would also be possible, eventually with interconnection of an additional inversion chamber, folding in in a certain way in 180º the part of the tank 1 '' to thereby place connections 2 and 5 on the same side as connections 3 and 4.

Regardless of the fact, that interstices 7 or 8 can also be made by means of T bags (see figure 3 A), prefabricated individual itself known, among which are in each case other interstices (overflow or 6 '' flow channels not shown in figure 3 A), an embodiment can also be provided of the continuous flow apparatus according to figure 3, according to which the separation walls 6 are constituted in the form of cuvettes 6 ' with 6 '' flanged overflow channels, which cross the 7, 8 interstices and 6 '' 'snap-in openings flush with these in the corresponding contiguous separation wall 6 and these walls of separation 6 with its edges of the stacked cuvettes 10 are joined at all junction points 13 with each other liquid tight (for example by welding).

For separation walls 6 or the configuration of the entire continuous flow apparatus enjoy preference however the separation walls 6 according to the figure 3 B, known per se, under consideration of the form of construction compact and that under the narrow installation conditions in a continuous flow gas heater acquired here special importance. According to this the separation walls 6 are also constituted in the form of 6 'cuvettes and equipped with connection surfaces 11 stamped oriented each in direction opposite and free of stamping in the area of its openings overflow 10, for which also in this case all the points of junction 13 may be attached to each other liquid tight. Is welded joint takes place in this way in a special way, that between the 6 'cuvettes of thin stainless steel sheet is find buckets corresponding to the sheet shape for thin welding, such as Cu sheet (no represented), for which purpose the complete cell stack heated to an elevated temperature and therefore the Cu sheets taken to the foundry.

Under new indication on the scheme of interconnection according to figure 2, there is also naturally possibility to configure these 6 'cuvettes or separation walls 6 so that these at the points where necessary, present Up and down each three overflow openings.

\hbox{depósito 1''.}

With regard to the extent that the separation walls 6 in the smaller part of the tank 1 'have a greater heat transfer than those found in the part of the larger tank 1'', it turns out, that regardless of the possible choice of material with a higher heat conductivity, this is preferably carried out, because at least the separation walls 6 disposed in the part of the tank 1 'are equipped with prints that increase the heat exchange surfaces such as rib-shaped prints , cross ribs, button shaped ribs or the like. Since these prints are as a rule known in heat exchangers and very generally also in the construction of heating boilers, this is not especially represented here. The extent to which these prints must be provided at least in the separation walls of the part of the tank 1 ', naturally includes the possibility of also equipping the separation walls 6 in the part of the tank 1''with these prints , which, however, are then chosen and configured in such a way that a lower heat transmission results in this part as well as a smaller head loss. As a result this results in the part of the tank 1 'having a higher degree of yield than the part of the

 \ hbox {deposit 1 ''.} 

In the part of the tank 1 'are provided by consequent stamping in the form of ribs (not shown especially) with a smaller stamping depth, which it gives rise to a width of the smallest interstitium and in the part from the 1 '' tank to others with a greater depth of stamping

Claims (7)

1. Small volume continuous flow apparatus for heating drinking water, in particular for installation in and interconnection with continuous flow gas heaters, consisting of a reservoir (1) with cold water supply and water outlet connections hot (2, 3) and with outlet connections of the heating water and return of the heating water (4, 5), for which purpose the tank (1) is configured with separation walls (6) to form a heat exchanger of plates and the separation walls (6) alternately and consecutively limit interstices (7, 8) conductors of drinking water and heating water, characterized in that the part of the tank (1 ') of the tank (1) on the outlet side of the Hot water stream is sized with a volume smaller than the part of the tank (1 '') of the tank (1) on the inlet side of the cold water stream, because the cold water connections and hot water outlet (2 , 3) and outlet connections of the heating water and return of the heating water (4, 5) are arranged in each case in the other part of the tank (1 ', 1''), for which purpose the separation walls (6) arranged in the smaller part of the tank (1 '), considered from the point of view of the difference of the surfaces, has a greater heat transmission with respect to the separation walls (6) in the other part of the tank (1'' ), and because the interstices (7, 8) are each connected in such a way that in the parts of the tank (1 ', 1'') there is an interconnection in a continuous flow and / or countercurrent flow regime with respect to the two flow means. 2. Continuous flow apparatus according to claim 1, characterized in that all connections

 \ hbox {(2 to 5)} 

They are arranged on one side of the tank (1). 3. Continuous flow apparatus according to claim 1 or 2, characterized in that the interstices

 \ hbox {(7, 8)} 

conductors of the drinking water and heating water are connected to each other in each case in such a way that in the part of the tank (1 '') there is an interconnection in the flow regime of direct current and in the part of the tank (1 ' ) in flow regime in

 \ hbox {countercurrent.} 

4. Continuous flow apparatus according to one of claims 1 to 3, characterized in that at least one inversion chamber (9) is also arranged between the parts of the tank (1 ', 1''), which is also limited by the separation walls ( 6). 5. Continuous flow apparatus according to one of claims 1 to 4, characterized in that at least the separation walls (6) disposed in the part of the reservoir (1 ') are equipped with prints that increase the heat exchange surfaces, such as nerve-shaped prints, cross-shaped nerves, button-shaped nerves. 6. Continuous flow apparatus according to one of claims 1 to 5, characterized in that the separation walls (6) are configured in the form of cuvettes (6 ') and in the area of their overflow openings (10) are equipped with surfaces of connection (11) stamped free of stamped ribs, oriented in each case opposite to the plane of the separation surface and all the points of connection (13) are connected to each other liquid tight. 7. Continuous flow apparatus according to one of claims 1 to 5, characterized in that the separation walls (6) are configured in the form of cuvettes (6 ') with flanged overflow channels (6'') running through the interstices (7 , 8) and snap-in openings (6 '') flush in the corresponding contiguous separation wall (6) and these separation walls (6) stacked with their edges of the cuvette (12) are connected to each other liquid-tight at all the junction points (13).