ES2661557A1 - DEVICE FOR STORAGE OF HOT WATER FOR SANITARY USE (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

The object of the invention is a device for storing hot water for sanitary use, comprising a storage tank (2) and a hatch (3, 4) for access to the storage tank (2), characterized in that said access hatch (3) is provided with a means of reduction and speed orientation (7) of a flow of water intended to feed the storage tank (2) with water. (Machine-translation by Google Translate, not legally binding)

Description

HOT WATER STORAGE DEVICE FOR SANITARY USE

Technical sector

The object of the invention is a hot water storage device for sanitary use.

10 State of the art

Generally, a hot water storage device for sanitary use comprises a water storage tank and an access hatch to the storage tank.

15 In a known manner, the trapdoor allows, during a manufacturing process of the device, to apply an adapted coating on an inner surface of the water storage tank.

20 In such a storage device, it is essential to ensure a thermal stratification of the water contained in the storage device since the thermal stratification of the water guarantees a reduction in the energy to be provided to heat the water.

25 Thermal stratification means the distribution of water in strata or horizontal layers, each layer corresponding to a given temperature.

Due to the natural thermal stratification of water, hot water occupies a higher level in the reservoir, while cold water occupies the bottom of the reservoir.

Thus, to benefit from this natural distribution of water, in the so-called drinking phase, the tank is fed from the bottom with cold water, and the top is removed from the Hot water; and, in the so-called loading phase, cold water is extracted from the bottom

and the upper part is fed with hot water.

However, to optimize stratification, any internal movement of water in the reservoir must be avoided.

However, cold water or hot water enters the tank through a bypass with 5 a given speed, and penetrates deep into the tank practically up to layers of warm water, which inevitably causes mixed water.

This results in a notable increase in the energy to be provided to heat the entire volume of water to a desired temperature, due to a loss of

10 performance of a heat generator.

Object of the invention

The objective of the invention is to alleviate the aforementioned drawbacks.

For this purpose, the invention has as its object a hot water storage device for sanitary use, comprising a storage tank and an access hatch to the storage tank, characterized in that said access hatch is provided with a reduction means and speed orientation of a water flow

20 intended to feed the storage tank with water.

Thanks to the device according to the present invention, it is possible to optimize the stratification in the storage tank, since the speed reduction and orientation means degrades the velocity of the water flow entering the storage tank.

25 storage, which avoids any mixing of water in the storage tank and preserves the thermal differentiation of the water layers.

Furthermore, the device according to the present invention comes from a simple manufacturing process, because a surface treatment can be applied (for example,

30 against corrosion and / or to guarantee the compatibility of the storage device with the power supply) independently to the tank, on the one hand, and to the reduction and speed orientation means, on the other hand.

In addition, the device according to the present invention is modular, insofar as the specific structure of the reduction and speed orientation means is chosen.

advantageously before your solidarity with said trapdoor.

According to another feature of the invention, the trapdoor is disposed at one end of the storage tank that forms the bottom of the storage tank, being 5 the speed reduction and orientation means arranged protruding from the trapdoor in the storage tank, in the center of the bottom of the storage tank.

According to another feature of the invention, the device comprises a second access hatch to the storage tank.

According to another characteristic of the invention, the second hatch is provided with a means for reducing and speeding a flow of water intended to feed the storage tank with water.

According to another characteristic of the invention, the second hatch is disposed at an end opposite the bottom of the storage tank that forms the upper part of the storage tank, the speed reduction and orientation means being disposed protruding from the hatch in the storage tank, in the center of said upper part.

According to another characteristic of the invention, the device comprises a tube comprising a first end integral with the second hatch and a second end integral with the reduction and speed orientation means, and whose length preferably depends on the power and / or of the flow of a heat generator of the storage device.

According to another characteristic of the invention, the means or at least one of the reduction and speed orientation means is a deflector.

According to another feature of the invention, the means or at least one of the means of

Speed reduction and orientation comprises a main body comprising a plurality of water outlets outside the main body.

According to another characteristic of the invention, the main body comprises two water inlets in the reduction and speed orientation means, one of the two being

35 inputs configured to connect to a branch called loopback

of a collective installation of hot water for sanitary use.

According to another feature of the invention, the device comprises a generator of water heating and a heat exchanger between a flow of water from the 5 tank and other fluid.

A subject of the invention is also a hot water installation for sanitary use of a plurality of premises, comprising a storage device as described above, comprising a branch of hot water supply

10 for sanitary use of each room and a return branch of hot water for sanitary use from each room to the storage tank, called the return branch, one of the two entrances of the main body forming an end of the return branch.

The invention also relates to a method of manufacturing a storage device as described above, which comprises a surface treatment step of the storage tank and a surface treatment stage of said at least one reduction means and of orientation of speed, independent of the stage of treatment of surface of the warehouse of storage.

Description of the figures

Other features and advantages of the invention will be further apparent upon reading the following description. This is merely illustrative and should be read with respect

25 to the attached drawings, in which:

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Figure 1 is a schematic view in longitudinal section of a storage device according to the present invention;

Figure 2 is a detailed perspective view of a bottom of a storage tank of the storage device of Figure 1;

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Figure 3 is a detailed perspective view of an exterior of the bottom of the figure

2;

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Figure 4 is a detail view in longitudinal section of an upper part of the device of Figure 1 according to a variant embodiment;

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Figure 5 is a detail view in longitudinal section of a bottom of the device 5 of Figure 1 according to a variant embodiment;

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Figure 6 is a perspective view of a reduction and speed orientation means of a water flow of Figure 1; Figure 7 is a perspective view of a means of reduction and orientation of a water flow rate according to a variant;

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Figures 8a and 8b are simulation results of a thermal distribution of the device of Figure 1, providing a means of reduction and speed orientation, respectively, of 12 holes and 24 holes, for a flow rate of 96

15 l / min;

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Figure 9 is a simulation result of a thermal distribution of the device of Figure 1, providing a means of reduction and orientation of 24 holes for a flow rate of 45 l / min;

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Figures 10 and 11 illustrate a temporary evolution of the temperature in the lower and intermediate part of the storage tank of Figure 1, in comparison with a temporary evolution according to the prior art;

Figure 12 illustrates ramifications of a collective installation comprising the storage device of Figure 1; Y

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Figure 13 illustrates a speed reduction and orientation means according to a variant particularly adapted to the installation of Figure 12. 30

Detailed description of the invention

Water storage device

The object of the invention is a hot water storage device for use

sanitary, with reference (1) in the figures.

As can be seen in the figures, the device (1) comprises a water storage tank (2) and at least one access hatch to the storage tank (2).

Preferably, the storage tank (2) has a general cylindrical shape.

According to the illustrated embodiment, the tank (2) comprises a first and a second hatches (3, 4).

The first hatch (3) is arranged at a first end of the tank (2) that forms the inner bottom (5) of the storage tank.

15 The second hatch (4) is arranged at an end opposite the bottom (5) and forms the upper part (6) of the tank (2).

As can be seen more particularly in Figures 1 to 3, each access hatch (3, 4) is provided with a means for reducing and speeding a water flow 20 intended to feed the storage tank with water ( 2), and with the reference (7, 8) respectively.

As shown in Figure 2, the medium (7) protrudes out of the first hatch (3) in the storage tank (2), preferably in the center (9) of the bottom (5) of the storage tank ( 2).

Also, the medium (8) protrudes out of the second hatch (4) in the tank (2), preferably in the center (10) of the upper part (6) of the storage tank (2).

Advantageously, the tank (2) is fed with cold water by means (7).

Advantageously, the tank (2) is fed with hot water by means (8).

35 As can be seen in Figure 1, the storage device (1) also

It comprises a heat exchanger (11) for heating the water in the tank (2) by means of a thermal exchange with a second fluid.

The second fluid is heated in turn by a generator (12), such as a boiler, a 5 heat pump or solar panels.

The second fluid can be water.

The storage device (1) comprises a branch (13) for supplying cold water from a branch (14) of the tank (2) to the heat exchanger (11).

The storage device (1) also comprises a branch (15) of hot water supply from the heat exchanger (11) to a branch

(16) connected to the medium (8).

Advantageously, the device comprises water circulation pumps in one of the branches, (13) or (15), not shown.

The tank (2) comprises a cold water inlet bypass (17) in the tank (2), 20 connected to the reduction and orientation means (7).

As can be seen in figure 1, the outlet branch (17) is arranged in the lower part of the tank (2).

The tank (2) comprises a branch (18) of hot water outlet outside the tank (2).

As can be seen in figure 1, the outlet branch (18) is arranged in the upper part of the tank (2).

The branch (18) is advantageously arranged on the trapdoor (4).

It is observed that the tank (2) contains water that is naturally stratified, that is to say that the water is distributed in the tank (2) in layers of different temperatures, the water being 35

arranged at the level of the upper part of the tank (2).

Cold water means water from the coldest water layer.

5 Cold water is, for example, at 10 ° C.

By hot water, water from the hottest layer is understood.

The hot water is, for example, at 60 ° C. 10 Water circulation in the storage device

In the outlet, that is, when the heating device (1) feeds a room with hot water, a flow of hot water leaves the tank (2) through the outlet branch (18). In parallel, a flow of cold water F penetrates the bottom of the tank (2) through the medium (7).

The speed reduction and orientation means (7) considerably reduces the speed of the cold water, as will be explained later, which guarantees an optimization of the stratification of the water contained in the tank (2).

In the load, that is to say in the heating mode, a part of the cold water is extracted from the tank (2) by the branch (14) and circulates successively through the branch (13), then the heat exchanger (11), in the one that heats the water by the second fluid.

The inlet bypass (14) is advantageously arranged on the trapdoor (3).

Then, the heated water circulates in the branch (15) before entering the tank (2) through the medium (8) through the branch (16).

30 The speed reduction and orientation means (8) considerably reduces the speed of the hot water, as will be explained later, which guarantees an optimization of the stratification of the water contained in the tank (2).

35 According to a variant illustrated in Figure 4, the output branch (18) may be

advantageously arranged on a flange (22), described below. According to another variant illustrated in Figure 5, the branch (14) is different from the flange (22). 5 Speed reduction and orientation means According to a preferred variant, illustrated in Figures 1 to 6, the speed reduction and orientation means (7) and (8) each comprise a main body (20) comprising a plurality of water outlets outside the main body, with reference 10 (21). As can be seen more particularly in Figure 6, the main body (20) is a ferrule, whose longitudinal axis is preferably vertical.

15 The ferrule (20) is preferably welded onto a flange (22) screwed to the associated flap (3, 4). The flange (22) has a general crown shape.

20 It is noted that, seen from the outside, only the leads (14, 17) and the flange (22) are visible from the outside of the tank (2). As can be seen in figure 6, the holes (21) are arranged in a side wall

(23) of the ferrule (20).

25 The wall (23) is delimited between the flange (22) and a disk (24) opposite the disk (22).

The holes (21) of the ferrule (20) constitute the only water outlet passages outside the inlet bypass (16, 17).

30 Due to the presence of a multitude of holes (21), a flow F entering the medium (7) becomes a multitude of flows f leaving the medium (7).

Because the holes (21) are arranged laterally, the flows f leaving the ferrule

35 (20) form a non-zero angle with the longitudinal direction L of the ferrule (20).

The means (7, 8) are located in the tank (2) so that the longitudinal direction L of the ferrules (20) co-indexes with the longitudinal axis Z of the tank (2).

The flows f also form a non-zero angle with the direction of the longitudinal axis Z of the 5 tank (2), which prevents water from being directed longitudinally through the tank (2) and penetrate the successive layers of the stratification.

The total section of the holes (21) is adjusted to limit the speed of water out of the ferrule (20).

10 In Figure 2, it is noted that the means (7) of the bottom of the tank (2) is arranged so that the edge (24) is as close as possible to the bottom (5) of the tank (2).

However, it is possible that the reduction and orientation means comprise a tube 15 integral with the ferrule (20).

This variant is particularly advantageous for the medium 8 mounted on the upper part of the tank (2).

20 As can be seen in Figure 1, the tube (25) comprises a first end (26) integral with the second hatch (4) and a second end (27) integral with the ferrule (20).

The tube (25) extends longitudinally along the tank (2), according to a direction that coincides with the longitudinal axis Z of the tank (2).

25 The length of the tube (25) is chosen so that the water in the tank (2) is penetrated through the medium (8) into a layer of water whose temperature is not too high, so as not to disturb the volume of hot water available above the medium (8).

30 The length depends specifically on the power and flow of the generator (12).

According to a variant illustrated in Figure 7, the reduction and speed orientation means is a deflector (28).

35 The baffle (28) comprises a wall (29) of deviation of the water flow entering the

medium (7), which allows, at the same time, to reduce the speed of the incoming water flow F and orient the flow F in a flow F ’to prevent it from penetrating deeply into the reservoir (2).

5 Simulation results

The results of Figures 8a and 8b illustrate a thermal distribution in the tank (2) after 60 s of a tank load (2) with cold water, the ferrule (20) provided, respectively, with 12 holes and 24 holes

The water flow is 96 l / min (1.6 * 10 /).

As can be seen in Figure 8a, the coldest water flows along the bottom (5) and through the lateral edges (30) of the reservoir (2).

15 Due to the presence of the holes (21) in the side wall of the ferrule (20), no jet of cold water is emitted longitudinally along the Z axis.

As is clear from Figure 8a, the stratification of the container is not

20 modified by the arrival of cold water, since cold water is directed only to the bottom of the tank (2).

As can be seen in Figure 8b, it can be seen that the stratification is not disturbed by the cold water load.

25 Because the ferrule comprises twice as many holes as for the embodiment of Figure 8a, the stratification is even better, the hot-cold water mixture being even smaller than in Figure 8a.

30 Therefore, it is clear from the comparison of Figures 8a and 8b that, according to the configuration of the medium (7, 8), in particular according to the arrangement, the area and the number of holes, the storage device (1) It adapts to the use you want to make.

In other words, the storage device (1) is modular depending on the use

35 desired.

The results of Figure 9 illustrate a thermal distribution in the tank (2) after 60 s of loading, the ferrule having 24 holes.

The water flow is 45 l / min (0.75 * 10 /).

As can be seen in figure 9, for a flow rate of 45 l / min (0.75 * 10 /), the 24-hole ferrule guarantees a better distribution of hot and cold water.

However, for a lower flow rate, for example of the order of 10 l / min (0.16 * 10 /), the ferrule with 24 holes and the ferrule with 12 holes can lead to the same volume of hot water, depending on the defined heating time.

Experimental results

15 Figure 10 illustrates a curve (81) of temporal evolution of the ideal temperature at the bottom of the tank (2).

Figure 10 also illustrates a curve (82) of temporal evolution of the actual temperature at the bottom of the tank (2) of the prior art, without reduction and orientation means.

Figure 10 also illustrates a curve (83) of temporal evolution of the actual temperature at the bottom of the tank (2) of the storage device of Figure 1.

As can be seen in Figure 10, the ideal curve (81) is a constant temperature at 10 ° C after 6 pm.

From 18 h, the curve (83) is almost constant, at an average temperature of the order of 14ºC.

30 From 18 h, the curve (82) describes more changes, for an average temperature higher than 20ºC.

Thus, the curve (83) is considerably closer to the ideal curve (81) than the curve

(82).

Figure 11 illustrates a curve (91) of temporal evolution of the ideal temperature at half the height of the tank (2).

Figure 11 also illustrates a curve (92) of temporal evolution of the actual temperature at 5 half the height of the tank (2) of the prior art, without reduction and orientation.

Figure 11 also illustrates a curve (93) of temporal evolution of the actual temperature at half the height of the tank (2) of the storage device of Figure 1.

10 As can be seen in Figure 11, the ideal curve (91) is a constant temperature at 10 ° C between 7 p.m. and 6 a.m., followed by two loads of water at 65 C between 7 a.m. and 8 a.m., and then between 8 h and 8 h 30 min.

15 As is clear from the temporal evolution, the curve (93) is considerably closer to the ideal curve (91) than the curve (92).

Collective installation

20 As can be seen in Figure 12, a collective hot water installation (100) is equipped with the storage device (1).

The installation (100) feeds a plurality of premises, such as apartments, with hot water.

25 As can be seen in Figure 12, the installation (100) comprises a branch (101) of hot water supply for sanitary use of each room (104) and a branch

(102) return of hot water for sanitary use from each room (104) to the tank (2), called return branch.

Variation of realization

As can be seen in Figure 13, the storage device (1) advantageously comprises a stratification tube (120).

The stratification tube (120) is coaxial to the ferrule (20) of the medium (7) arranged at the bottom

(5) of the deposit (2).

The tube (120) is screwed on the branch (121) that crosses the reduction and 5 speed orientation.

Advantageously, the stratification tube (120) extends longitudinally along the Z axis of the reservoir (2).

10 Water from the return branch flows to the stratification tube (120).

The stratification tube (120) comprises a plurality of holes (122) disposed one above the other.

15 Each hole is equipped with a hole plug valve.

The stratification tube (120) is configured so that it allows the opening of only one hole at a time.

20 Because the tube (120) extends longitudinally in the reservoir (2), the holes

(121) are arranged in successive thermal layers.

The open hole (121) is the submerged in the water layer of the reservoir (2) whose temperature is closer to the water temperature of the return branch.

25 This variant allows to further optimize the stratification in the tank (2) with respect to the loop return.

Manufacturing procedure

The object of the invention is also a method of manufacturing the storage device (1) comprising a surface treatment stage of the storage tank (2) and a surface treatment stage of the reduction and speed orientation means ( 7, 8), this stage being independent of the treatment stage

35 of storage tank surface.

The surface treatment is advantageously an anti-corrosion coating and / or a coating to make the device (1) compatible with food liquids or for sanitary use.

For example, the surface coating of the tank (2) may be an enamel, while the media material (7, 8) may be stainless steel.

Therefore, the manufacturing process of the storage device (1) is simple, since several different stages allow an adapted treatment of the tank, by a

10 side, and the media (7, 8), on the other hand.

Claims (11)

1. Hot water storage device for sanitary use, comprising a storage tank (2) and a hatch (3, 4) for access to the storage tank 5 storage (2), characterized in that said access hatch (3) is provided with a reduction and speed orientation means (7) of a water flow intended for feed the storage tank with water (2). 2. Storage device according to claim 1, wherein the trapdoor (3) is 10 arranged at one end of the storage tank (2) that forms the bottom (5) of the storage tank (2), the reduction and speed orientation means (7, 8) being arranged protruding from the trapdoor (3) in the storage tank (2), in the center (9) of the bottom (5) of the storage tank (2). 3. Storage device according to one of claims 1 or 2, comprising a second hatch (4) for access to the storage tank (2). 4. Storage device according to the preceding claim, wherein the second trapdoor (4) is provided with a means for reducing and speeding a flow 20 of water intended to feed the storage tank (2) with water. 5. Storage device according to one of claims 3 or 4, wherein the second hatch (4) is arranged at an end opposite the bottom (5) of the storage tank (2) that forms the upper part (6) of the storage tank (2), 25 the reduction and speed orientation means (8) being arranged protruding from the trapdoor (4) in the storage tank (2), in the center (10) of said upper part (6). 6. Storage device according to one of claims 4 or 5, comprising 30 a tube (25) comprising a first end (26) integral with the second hatch (4) and a second end (27) integral with the reduction and speed orientation means (8). 7. Storage device according to one of claims 1 to 6, wherein the means or at least one of the means for reducing and guiding speed (7, 8) is a baffle (28). 8. Storage device according to one of claims 1 to 7, wherein the medium or at least one of the reduction and speed orientation means comprises a main body (20) comprising a plurality of water outlets (21) outside the main body (20). 9. Storage device according to the preceding claim, wherein the main body (20) comprises two water inlets in the reduction and orientation means of 10 speed, one of the two inputs configured to be connected to a branch called loop return of a collective hot water installation for sanitary use. 10. Storage device according to any one of the preceding claims, comprising a water heating generator (12) and a heat exchanger (11) between a flow of water from the reservoir and another fluid. 11. Installation of hot water for sanitary use of a plurality of premises, provided with the storage device according to claim 9, comprising a branch 20 (101) of supply with hot water for sanitary use of each room (104) and a branch (102) of return of hot water for sanitary use from each room (104) to the storage tank (2), called branching of return, forming one end (103) of the two entrances of the main body one end of the return branch. 12. Method of manufacturing a storage device according to one of claims 1 to 10, comprising a surface treatment step of the storage tank (2) and a surface treatment step of said at least one reduction means and of orientation of speed (7, 8), independent of the stage of treatment 30 surface of the storage tank (2).