DE102008022462A1 - Device for recovering heat from warm water running off from showering tub, in house, has container formed as heat exchanger, where wall is sectionally formed by heat exchanger pipes by which cold water is conducted - Google Patents

Abstract

The device has a retaining container (6) mounted below an inlet opening (4) of a tub (1), where the container exhibits a retaining wall (8a) forming a barrage (7a). Warm water (W) from the inlet opening enters into the barrage which forms a drain trap. The warm water discharges from the barrage via the retaining wall, and is supplied to an exhaust line (5). The container is formed as a heat exchanger, where the wall is sectionally formed by heat exchanger pipes (9) by which cold water (K) to be heated is conducted.

Description

The The invention relates to a device for the recovery of Heat from a tub, especially sanitary tub running hot water. - Sanitary tub means in particular a shower tray. It may also be within the scope of the invention around a bathtub, a sink or other container act, the warm water is supplied and from this warm water comes out again. The water inlet of such a sanitary tub is usually a heating device for heating in the tub, z. B. shower tray, incoming water assigned. So when showering the incoming cold water by means of a heater for example, the water heater, to the desired Heated shower temperature. The heated shower water then runs in practice usually through a drain hole into a sewer, so that the heat is virtually unused the sewer is supplied. Measurements have shown that the waste water temperature at an individual shower temperature of about 40 ° C quite a temperature of for example May have 36 ° C.

For this reason, there is a need to use the heat of the wastewater energetically. For example, it has already been proposed to preheat the cold water fed to a mixer tap of a shower with the aid of the still warm waste water by removing heat from the tempered wastewater and feeding it to the cold water. For this purpose, a heat exchanger associated with the water discharge has been proposed. This heat exchanger is as it were integrated into the sewer, in the flow direction behind a siphon usually used as an odor trap. (see. DE 20 2006 012 197 U1 ).

Furthermore, it has been proposed for the purpose of preheating the cold water to arrange a heat exchanger in the region of the bottom of the shower tray itself (see. DE 20 2007 007 907 U1 ). This heat exchanger is arranged between the staggered bumps of the shower tray and thus has a meandering shape. The heat exchanger is attached to a floor, which is arranged hinged to the shower tray.

The insofar known measures are proportionate consuming, so they are not in practice so far have enforced. - This is where the invention starts.

Of the Invention is based on the object, a device for recovery from heat from a tub, especially sanitary tub to create running hot water, which is characterized by a simple and cost-effective construction as well as simple and inexpensive Mounting with high efficiency at the same time.

to Solution of this problem teaches the invention in a generic Device for the recovery of heat from out a tub, in particular sanitary tub draining hot water, that below a drainage opening of the tub (and consequently below the trough bottom) a storage container is mounted or can be mounted, which at least one forming a first barrage having first stowage wall, wherein the hot water from the drain opening entering the first barrage forming an odor trap and over the first dam wall exits this and to the Example, a drain line is supplied, wherein the Storage container designed as a heat exchanger by the stowage wall at least partially from heat exchanger tubes is formed or provided with heat exchanger tubes, through which the cold water to be heated out is.

The The invention is based on the knowledge that it is required anyway is, in the area of a drain of a sanitary tub, to Example of a shower to provide an odor trap, which even after completion of a shower process and thus after interruption the water supply retains a certain amount of water, so as to escape from the sewer otherwise escaping odors suppress. In the context of the invention is now on a conventional tube odor trap, which Also referred to as a siphon dispensed. Instead, (immediately) under the drain opening of the shower tray a storage container arranged as an odor trap, the stowage walls this Dust tank formed as a heat exchanger tubes are, or are provided with such heat exchanger tubes. The storage container consequently fulfills double functions, because on the one hand he realizes the necessary odor trap and on the other hand it serves to transfer heat of the running hot water to that in the heat exchanger tubes and consequently the dam walls guided and preheated Cold water. This heat transfer is special effective, since the storage container immediately below the Tannenablaufes can be arranged and therefore the expiring Hot water can be used directly energetically. Especially advantageous in this context is the fact that do not run the hot water through the heat exchanger at high speed flows through it, but temporarily in the storage container is dammed, so that an effective heat transfer is guaranteed.

In a particularly preferred embodiment, the invention proposes that the odor trap forming the first barrage one or more additional barrages with additional retaining walls are downstream, which are also at least partially formed by heat exchanger tubes or are provided with such heat exchanger tubes, the hot water from barrage to barrage runs and finally the drain line is supplied. The invention is based on the recognition that the hot water collecting in the storage container or odor trap can not, of course, remain in the storage container indefinitely, but must flow off continuously. For this reason, the invention proposes a realization of a plurality of barrages, wherein in all barrages a recovery of heat through the heat exchanger tubes designed as stowage walls. Thus, even if heat can be recovered from the warm wastewater already in the first storage container, the arrangement of several barrages ensures a particularly effective utilization of the residual heat available, since in each barrage the running hot water always remains for a certain time and in this way optimally the heat transfer can serve. This process is also optimized by the fact that a certain is done by mixing the hot water in the transition from one to the next barrage.

From Of particular importance is the fact that it is not required is that the additional barrages form an odor trap. It is perfectly sufficient if the first barrage and consequently the immediately below the drain opening arranged (first) Barrage forms the odor trap and also after completion of a Shower process a certain amount of water in the storage container stores. In this respect, the invention proposes in a preferred Further development that the further barrages after completion of the Water supply (independently) be emptied. These are the stowage walls of the additional barrages with provide the barrages interconnecting passages. there For example, they may be through-holes, through-holes or the like, which preferably in the region of the soil the container or the barrages are arranged. there The invention is based on the recognition that after a shower otherwise the water remaining in the barrages cools down, so that in the case of a renewed shower process the now cooled Residual water the recovery of heat from the would affect newly supplied hot water, there is an undesirable mixing of the "new" hot water come with the dammed up "old" cold water would. For this reason, it is appropriate the additional barrages after completion of the shower process to empty, because in this way a particularly effective heat recovery succeeds. The passages are dimensioned so that during of the hot water supply not all the water through these passages can run, so that the weir function does not affect becomes. Nevertheless, the passages are sufficiently large at the end of a shower process the flow of residual water to ensure reliable. Furthermore the passages are not directly through the heat exchanger tubes guided, but through areas of the retaining walls, in which no heat exchanger tubes are arranged. To For example, the lower area of the retaining walls of Webs or the like are formed, on which the heat exchanger tubes rest. The passages can also be below the retaining walls may be arranged, for example in the ground be incorporated in the dust container.

Around to prevent these passages, which expediently a relatively small diameter exhibit, by soap, foam or other deposits in the course Time to enforce, the invention proposes that through the passages a movably mounted cleaning device, For example, a cleaning rod or the like passed is. This cleaning device, for example, the cleaning rod leaves from the outside, that is, from the user's side move to eliminate possible blockages and flush away.

There the first retaining wall itself does not have a permeable one Opening should be provided, proposes the invention before that the cleaning device via a liquid-tight or sealed passage, for example a membrane, movably passed through the (first) stowage wall of the (first) barrage is. A particularly simple operation of this cleaning device succeeds when the cleaning device with a in the drain opening the tub arranged tub closure is connected so through Actuation or movement of the tub lock also the Cleaning device is operated or moved.

For this purpose, it is expedient if the cleaning device which can be moved in a substantially horizontal direction, for example the cleaning linkage, is connected via a coupling to the substantially vertically movable bucket closure. In addition, it may be expedient if the tub closure and / or the cleaning device is acted upon by a spring counter to the actuating direction. Consequently, the coupling serves to deflect the force, so that the cleaning device is moved in the horizontal cleaning direction with a simple actuation or movement of the tub closure in the vertical direction. The spring action ensures that it is sufficient to simply press on the trough closure or to step on this and thus to burden in the cleaning direction or direction of actuation, so that the Fe which serves as a return spring. In any case, by moving back and forth of the cleaning rod cleaning the passages causes. This can be further optimized in that the cleaning rod is provided with cleaning elements, such as cleaning bolts or the like, which are adapted to the passages. Adapted means in this case that the outer diameter of these cleaning bolts corresponds approximately to the inner diameter of the passages or is slightly smaller and that also corresponds to the distance of the individual cleaning bolts to each other approximately the distance of the barrage walls.

in principle there is a possibility that the entire barrage tank consists of heat exchanger tubes and consequently also the outer walls the container formed by heat exchanger tubes become. In a preferred embodiment of the invention However, the storage container has an insulated outer container which is not itself formed by heat exchanger tubes. In these isolate outer containers are then the the barrages forming stowage walls with their heat exchanger tubes used. The stowage walls essentially run transverse to the tank's longitudinal direction, so you the baffles form and the heat exchanger tube system then overall designed meandering in plan view be. However, the invention also includes embodiments, in which the individual barrages concentrically nested are.

All in all the invention is characterized by an excellent heat transfer with at the same time compact construction and simple assembly. The Shape of the barrage container may be due to the circumstances be adjusted so that the assembly directly under the expiry of Shower tray can be done. Because shower trays usually can have the drain in a corner, by turning the container the orientation altogether will be changed so that sufficient Room to the walls of mostly in niches or built-in Shower trays is available.

in the During assembly, the device according to the invention with the integrated in the odor trap heat exchanger to the cold water inlet of a heating device, for example one Water heater connected. The cold water house connection is consequently not directly with the inlet of the water heater but the cold water is first through the Passed heat exchanger tubes of the heat exchanger. This cools the cold water before it reaches the water heater. preheated so that the need for (for example, electric) Energy for heating the water to the desired Temperature is significantly reduced. The invention includes not only embodiments with electric heaters, but also other embodiments, such as gas heaters or similar.

in the The invention will be described below with reference to a purely exemplary embodiment illustrative drawing explained in more detail. Show it

1 a device according to the invention arranged in the region of a shower tray for the recovery of heat in a schematic side view,

2 a simplified plan view of the object after 1 .

3 a section of the object after 1 .

4a an enlarged section 3 and

4b a section through the object after 4a ,

In the figures, a sanitary tub in the embodiment as a shower tray 1 shown. The hot water for showering is in a conventional manner via a heater 2 , For example, a water heater, heated to the desired temperature and a merely indicated mixer tap 3 fed. About the process 4 the shower tray 1 the still warm wastewater W then enters a sewer pipe 5 ,

According to the invention is now below the drain opening 4 the tub 1 and thus below the tub bottom B a storage container 6 mounted, on the one hand an odor trap and on the other hand at the same time a heat exchanger for preheating the heating device 2 supplied cold water K by means of the residual heat of the running hot water W forms. For this purpose, the storage container 6 First of all, a first barrage 7a forming stowage wall 8a on. The hot water W emerges from the drain opening 4 in this first barrage 7a of the dust container 6 and runs over the first stowage wall 8a from this. The storage container is inventively designed as a heat exchanger, that is, the storage container forming the storage container or arranged in the storage container 8a is from heat exchanger tubes 9 educated. Through these heat exchanger tubes 9 Now the cold water K is passed, which the water heater 2 is supplied. In this way succeeds with the help of the expiring hot water W in the heat exchanger 9 a preheating of the through the heat exchanger tubes 9 passed cold water K. The first barrage 7a of the dust container 6 serves at the same time as an odor trap, so on one otherwise usual tube odor trap (siphon) can be dispensed with.

It can be seen that the storage container shown has a plurality of barrages for optimizing the heat transfer. The first barrage 7a are several more barrages 7b with additional retaining walls 8b downstream. These additional retaining walls 8b are also made of heat exchanger tubes 9 built up. In this way, it is now possible that the running hot water W from the first barrage 7a not directly into the sewer 5 flows off, but first of barrage 7b to barrage 7b continues to run, so that overall a particularly good utilization of the residual heat contained in the hot water W succeeds. The heat exchanger tubes 9 the individual barrages 7a . 7b preferably form a uniform heat exchanger tube system with common connections, that is, a common cold water connection 10 and a common outlet connection 11 , which with the heater 2 is connected. The feed end associated, for example, with the last dam wall 10 the heat exchanger tubes is as cold water inlet by means of press or screw connection to the cold water supply 13 connected to the house network. The opposite end, which is the tempered outlet 11 forms the heat exchanger tank is then to the inlet of the heater 2 , for example, the water heater connected. Further, to the sewage connection 12 the fiction, contemporary device the only indicated sewer 5 connected as usual. Incidentally, indicated in the figures that the barrages 7a . 7b and consequently the heat exchanger tubes 9 inside an insulated outer container 14 are arranged. The storage container 6 thus has an insulated outer container 14 on, in which the heat exchanger tube system is inserted.

In the course of operation, therefore, that runs through the drain opening 4 from the tub 1 escaping hot water W in the first barrage 7a of the dust container 6 , The incoming water is in this the odor trap forming the first barrage 7a calmed down. The water level rises until it reaches the first overflow threshold of the first dam wall 8a has reached. From there, the water then runs to the next level 7b and so on, to the last stage. Has also the last barrage 7b filled, runs the cooled water over the sewer connection 12 into the sewer 5 ,

Assuming in the context of a sample calculation that the water inlet temperature the home network has an average of about 10 ° C and the temperature of the hot water during showering in the Medium is set to about 40 ° C, so lets with the device according to the invention a Achieve energy savings of about 50%. Because it can be assumed that, for example, an assumed total amount of heated Shower water of 25 liters a preheating of the cold water at about 25 ° C can succeed.

Of particular importance in the context of the invention, moreover, the fact that the storage container or its first barrage 7a as it fulfills a dual function and on the one hand serves the heat recovery and on the other hand forms an odor trap. For this reason, it is necessary that even after finishing the shower process, the water in the first barrage 7a remains so that the function of the odor trap can be realized. However, it does not come to unnecessary cold mixed water conditions at the beginning of the shower process, it is expedient if it is ensured that after completion of the shower process, the water from the remaining barrages 7b expires. These are the stowage walls 8b the additional barrages 7b with passages, for example through holes 15 Mistake. These through holes 15 are in the embodiment in the region of the bottom of the barrages 7b arranged. In order not to disturb the barrage function, they have through holes 15 a relatively small diameter, so that during operation only very little water passes through these holes and consequently a perfect storage function is guaranteed. Only when the showering process is completed, the barrages empty 7b slowly through these through holes 15 , In spite of the relatively small diameter of the through holes 15 To prevent clogging of the holes with impurities, the passages are in a cleaning device 16 provided by, for example, through the passages 15 a cleaning rod is passed. By moving this cleaning device 16 can be impurities in the through holes 15 to solve. In this case, in the context of the invention, a simple operation of this cleaning device 16 because the cleaning device 16 - As shown in the embodiment - with the in the area of the sequence 4 arranged tub closure 17 connected is. By moving the tub lock 17 Consequently, the cleaning device can be 16 move and operate in this way. To prevent even the first barrage 7a is emptied, is in the first stowage wall 8a no passage opening provided. Rather, it is (merely) a liquid-tight, mobile bushing 18 , For example, a membrane, provided for the cleaning device.

Details related to the through holes 15 arise for example from the 4a and 4b , It is understood that the perforations 15 not readily passed through the heat exchanger tubes themselves. For this reason, the lower areas of the retaining walls 8a . 8b in the embodiment of webs 21 formed, wherein the heat exchanger tubes 9 on these jetties 21 are arranged. The passages 15 are therefore in these webs 21 and / or in the ground 22 of the dust container 6 brought in. This is in particular on 4b directed. This shows that the cleaning rod 16 in the lower part of the through hole 15 in the area of the soil 22 is guided. The through hole 15 then extends into the area of the bridge 21 , with the cleaning bolts 20 as it were on the cleaning rod 16 are attached so that the cleaning bolts 20 then in the course of the operation of the cleaning device through the passages 15 in the area of the bridges 21 be guided. The passages are in the area of the floor 22 adapted substantially to the cross-sectional shape of the cleaning rod, so that the passages also form a guide. This may be useful if this leadership of the rod 16 a part-circular cross-section, said pitch circle extending over (slightly) more than a semicircle, so that the rod 16 safely guided in this subcircle.

The function of the cleaning device according to the invention results from a comparative analysis of 1 . 2 and 3 , It can be seen that the cleaning device 16 , which is designed as a cleaning rod or a cleaning rod, is moved to the purpose of cleaning the passages in the horizontal direction back and forth. This is this cleaning device 16 via a clutch 19 to the substantially vertically movable tub closure 17 connected. The actuation takes place by simply pressing or loading the tub closure 17 so the cleaning device 16 is moved in the direction of actuation R. Here, the tub closure 17 and / or the cleaning device 16 be counteracted with a spring, not shown, opposite to the actuating direction R beauf, so that the cleaning device is moved back and forth by multiple loading of the tub closure and corresponding provision by the spring. Incidentally, in 3 recognizable that the cleaning rod 16 with several cleaning elements, for example cleaning bolts 20 is provided, which are mounted in the retaining walls corresponding intervals on the cleaning rod. These cleaning bolts are in their outer diameter (approximately) to the inner diameter of the passages 15 customized. In a basic position, these cleaning bolts lie 20 outside of the through holes, so that the water can drain through the through holes. In the course of the operation, these cleaning bolts then briefly engage in the through holes and remove in this way any impurities present.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202006012197 U1 [0002]
• - DE 202007007907 U1 [0003]

Claims (12)

Device for recovering heat from a tub ( 1 ), in particular sanitary tub, running warm water (W), characterized by a below a drain opening ( 4 ) of the tub ( 1 ) mounted or mountable storage containers ( 6 ), which at least one a first barrage ( 7a ) forming first stowage wall ( 8a ), wherein the hot water (w) from the drain opening ( 4 ) in the first barrage forming an odor trap ( 7a ) and over the first stowage wall ( 8a ) exits from this and, for example, a drain line ( 5 ), wherein the storage container ( 6 ) is formed as a heat exchanger, wherein the stowage wall 8a at least in some areas of heat exchanger tubes ( 9 ) is formed or is provided with heat exchanger tubes through which the cold water to be heated (K) is guided. Apparatus according to claim 1, characterized in that the odor trap forming the first barrage ( 7a ) one or more additional barrages ( 7b ) with additional retaining walls ( 8b ), which also at least partially from heat exchanger tubes ( 9 ) are formed or provided with such, wherein the hot water (w) from the first barrage ( 7a ) over the first stowage wall ( 8a ) into the additional barrages ( 7b ) and from barrage to barrage via the retaining walls ( 8b ) and finally the drain line ( 5 ) is supplied. Apparatus according to claim 2, characterized in that for emptying the additional barrages ( 7b ) whose retaining walls ( 8b ) with the additional barrages 7b connecting passages ( 15 ), for example holes or similar openings, are provided. Device according to claim 3, characterized in that the passages ( 15 ) are arranged in the vicinity of the bottom of the storage container and / or integrated in the soil. Apparatus according to claim 3 or 4, characterized in that through the passages ( 15 ) a movably mounted cleaning device ( 16 ), for example, a cleaning rod or the like is passed. Apparatus according to claim 5, characterized in that the cleaning device ( 16 ) via a liquid-tight passage, for example a membrane, movable through the first stowage wall ( 8a ) of the first barrage ( 7a ) is passed. Device according to one of claims 5 or 6, characterized in that the cleaning device ( 16 ) by actuating one in the drain opening ( 4 ) of the tub ( 1 ) arranged tub closure ( 17 ) is movable. Device according to one of claims 5 to 7, characterized in that the in a substantially horizontal direction movable cleaning device ( 16 ), for example the cleaning rod, via a coupling ( 19 ) to the substantially vertically movable tray closure ( 17 ) connected. Device according to one of claims 5 to 8, characterized in that the tub closure ( 17 ) and / or the cleaning device ( 16 ) is acted upon by a spring opposite to the actuating direction (R). Device according to one of claims 5 to 9, characterized in that the cleaning device ( 16 ), for example, the cleaning rod with the passages ( 15 ) adapted cleaning elements, for example cleaning pins ( 20 ) or the like. Device according to one of claims 1 to 10, characterized in that the storage container ( 6 ) an insulated outer container ( 14 ), in which the barrages ( 7a . 7b ) forming retaining walls ( 8a . 8b ) with their heat exchanger tubes ( 9 ) are used. Device according to one of claims 1 to 11, wherein to the water supply of the tub a heating device, for example a water heater, connected, characterized that the heater supplied cold water through the heat exchanger tubes of the heat exchanger is guided.