FI118483B - Waste water piping with heat exchanger for bath equipment - Google Patents

Abstract

The invention relates to waste water piping with heat exchanger for bathing installations, for example a shower unit, which consists of basin (9), coarse and fine filters of waste water (11, 13), trap (12), heat exchanger (5), level controller (16) and air by-pass pipe (18), wherein in the waste water pipe (15) exiting the heat exchanger (5) a vertical level controller (16) is used creating an overflow barrier allowing emptying of the heat exchanger. The air by-pass pipe (18) positioned higher than the bottom of basin (9) by-passes heat exchanger (5) and level controller (16) channels air beyond trap (12) into sewage (17) via waste water drain (20). The heat exchanger (5) is preferably a heat exchanger element (31) made of copper pipes wound in reverse directions, which is preferably placed inside the wider section of waste water piping (30) so that this section of the piping is constantly filled with waste water with the aid of the level controller (16), and the heat exchanger element (31) connected at one end through the end cap (34) of the waste water pipe (30) can be easily removed under sanitary conditions using a plastic bag longer than the heat exchange element as a protective cover for the latter, which is placed with its mouth over the waste water pipe (30) from the side of end cap (34).

Description

This invention relates to a waste water piping system with new types of components for bath equipment (for example, a shower unit) equipped with heat exchangers. In such bath appliances, the thermal energy of waste water is transferred to hot fresh water either directly or by means of a heat medium.

By providing the wastewater pipeline with additional components in accordance with the present invention, the hydraulic resistance and service need of the wastewater pipeline and heat exchanger are reduced, maintenance is simplified and safe, and the heat exchanger has a longer service life.

A number of wastewater heat exchanger systems allowing the utilization of thermal energy in waste water are known in which heat exchangers of different construction and heat transfer characteristics are installed in or below a basin. Examples which may be mentioned are DE-3633321-A1, DE-3919543-A1, DE-3919544-A1, DE-3717720, DE-19817031, GB-2342146, V, NZ-314983 and EE-200100541. Fresh water flows through the heat exchangers separately from · · *, :: j waste water. When using the shower, fresh water is heated and fed directly into the * .J .: jet mixer or directed to a water heater. The main disadvantage of these inventions is the rapid fouling, as there is some air and impurities in the heat exchanger and this is a breeding ground for bacteria. In some solutions, such as DE-19817031A and EE-200100541, the heat exchanger is discharged after use. Thus, the litter residue on the surface of the water precipitates on the heat exchanger element and dries on it, forming a substrate for bacteria. In other solutions, which do not have any odor trap in the drain of the pool, e.g.

*. *. * DE-3919543-A1, problems are caused by the secretion of bad odor, the need for frequent cleaning, or the need for large amounts of detergent in the heat exchanger. for disinfection.

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The closest solution to the present invention is described in EE-200100541, which relates to a shower unit with a multi-tube heat exchanger for household, health care facilities, sports facilities, military sanitary units, 5 hotels, summer cottages and other places. The jet unit consists of a new design heat exchanger, a shower trap, a fresh water supply pipe, a jet mixer (preferably thermostatic), a clean hot water supply pipe, a shower basin, an electronic unit with a display, a temperature sensor and a freshwater sensor. The plastic shell heat-10 exchanger is installed under or near the shower. Underflow and overflow barriers are connected to the heat exchanger before the waste water outlet. The underflow barrier allows the cooler bottom layer of the effluent to flow out, while preventing the warmer effluent from flowing out of the upper layers, which increases the heat exchange coefficient. The overflow barrier provides the required water level in the heat exchanger 15 so that the pipes of the heat exchanger element are covered with water and discharged through a small outlet at the bottom of the overflow barrier.

The major disadvantage of this unit is that some air remains inside the heat exchanger and after use, the heat exchanger is emptied, resulting in favorable conditions for the corrosion of metal parts as well as aerobic bacteria and • · · * · · ** for the replication of other microorganisms which, after prolonged disruptions, dry and cling to the heat exchanger element along with the washing waste, thereby reducing heat transfer and resulting in clogging of the heat exchanger. • · *** The 25 overflow barriers included in the heat exchanger are not designed to hold heat. I changed the tank completely filled with water, resulting in favorable conditions for bacterial replication.

Another major drawback is the impeded flow of waste water through the odor trap, ♦ * '·; · 30 as the connection between the odor trap and the heat exchanger forms an air and foam barrier, creating a hydraulic additional resistance resulting in the accumulation of wash water 1 118483 at the bottom of the shower base, the air passing through the odor trap cannot flow forward because the air cannot flow downward against the lifting force, nor backward because the odor trap prevents air outflow. For hygienic reasons, the odor trap cannot be omitted, since disinfecting the entire heat exchanger would consume large amounts of des-5 infectious agent, which would be simultaneously released from the heat exchanger through the outlet of the drain in a short time.

A third disadvantage is that the water level in the heat exchanger changes during use and emptying, whereby lighter impurities than water can accumulate between the surfaces of the heat exchanger element.

A fourth disadvantage is that the aeration pipe of the heat exchanger must be connected to the shower basin above the water level in order to prevent the effluent from escaping through the vent pipe. Malodorous gases may escape from the aeration duct. Connecting the II-15 tailpipe to the air conditioning system is often complicated for technical reasons.

A fifth disadvantage is that the outlet of the overflow barrier drainage pipe, which keeps the water level stable in the heat exchanger, may become clogged over time; • • *, ·. · '20 therefore the heat exchanger is left unloaded and the possibility of an error free and • · V complete discharge is lost. When removing the heat exchanger, * wastewater, possibly containing corrosive cleaning agents, may flow out through * ··· * outlet ports.

A sixth disadvantage is that if the heat exchanger is clogged, in some embodiments, the plastic casing of the heat exchanger may be subjected to unbearably high hydrostatic pressure, which can result in leakage.

The object of the invention is to reduce the contamination and corrosion of the heat exchanger and the need for its maintenance; reduces the flow resistance of air and foam in the wastewater pipe • ·· between the odor trap and the heat exchanger; pa- ·· · * ♦ · # · · 4 118483 beach sewage filter; avoid the need to connect the air vent to the air conditioning system; provide a reliable alternative to waste water drainage and limit the maximum waste water pressure in the heat exchanger.

These objectives are achieved by fitting the level regulator to the waste water outlet from the heat exchanger, whereby the heat exchanger is continuously filled with waste water, which prevents lighter-weight washing waste from precipitating and drying on the heat exchanger element; for anaerobic bacteria, which can only replicate to a very limited extent in foam and dirt adhering to the surfaces, there are no remaining 10 places when they are in the water stream and exposed to cleaning and disinfectant agents. A coarse filter is provided at the pool outlet; followed by an improved fine filter for hair removal from waste water. The fine filter, preferably made of mesh and attached to a conical frame, may be placed at the outlet of the basin odor trap or in 15 separate units connected behind the odor trap. In the first case, the filter element may be removed from the pool outlet for cleaning or replacement by first removing the coarse filter; in another case, through a separate cleaning plug. As a result of these improvements, the fouling of the heat exchanger will be slowed down and the need for maintenance significantly reduced. Because of the reduced air release to the surface of the wastewater, the corrosion of the heat exchanger and the service life of the heat exchanger element is also slowed down.

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One of the reasons for the higher flow resistance is the accumulation of air and foam transported by •% · * «: · 'in the sewage pipe between the odor trap and the heat exchanger at 25- flowing waste water. It cannot move forward due to buoyancy or backward because the water-filled odor trap prevents flow. The odor trap cannot be left out for hygienic reasons, as malodorous gases may form in the heat exchanger due to bacterial activity. At the same time, frequently repeated disin- · * * ·. This would require large quantities of chemicals, which are for the most part hazardous to the environment. The problem is solved by a bypass air pipe that begins to smell at the top or side of the outgoing waste water discharge pipe and ends between the level regulator and the drain connection. The bypass pipe is introduced at at least one location, preferably near the odor trap, higher than the water surface height in the basin to avoid the flow of waste water mainly through the bypass pipe. The air outlet of the heat exchanger is connected to a bypass pipe or las-5 between the level control and the drain connection. Slightly lighter-than-water wash debris can escape through the vent through the foam. This also eliminates the need to connect the air outlet to the air conditioning system, and the maximum pressure of the waste water in the heat exchanger is limited. When the pressure of the effluent increases due to clogging or excess water flow to the heat exchanger, water flows into the sewer pipe through the bypass air pipe.

The ability to reliably remove wastewater from the heat exchanger for disconnecting the wastewater pipeline is achieved by turning the level regulator fitted with elastic seals to a horizontal position or by adding an optional valve 15 which can be opened. The heat exchanger outlet is located as low as possible to permit complete drainage of the waste water when the level control is turned to the horizontal position. In order to prevent the height adjuster from turning horizontally at random, it is provided with a vertical bracket, which is preferably mounted on the height adjuster • · ·; f 20 square square ring.

• 6 · 118,483 sewer system. Both clean water connections of the heat exchanger element are brought in sealed through the end cover, which allows for a simple and hygienic removal of the heat exchanger element for cleaning or maintenance.

The heat exchanger element consists of a plurality of parallel preferably copper tubes or plates, preferably twisted in opposite directions around the shaft and connected between the manifolds connecting the tubes or plates. The heat exchanger element preferably has a plastic core which is shorter than the heat exchanger element, which allows the waste water to be channeled and passed through the manifold-10 opening. One of the connecting tubes of the heat exchanger element is passed through a plastic core. For a plate-type heat exchanger element, the core is not required.

To remove the heat exchanger element, clean water connections are removed from the pipeline and temporarily plugged to prevent contamination; the end cap 15 is opened and the heat exchanger element is pulled into a plastic bag longer than the element which has previously been pulled over a wider portion of the waste water pipeline containing the integral heat exchanger and subsequently closed tightly. This allows the soiled heat exchanger element to be hygienically transported to the cleaning site. , Kalle.

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Figures 1-7 illustrate two preferred exemplary examples, the level adjuster • · ·, ···, and the filter.

• · • · ·. Figure 1 shows a circuit diagram of a shower unit having a heat exchanger.

• · · M *. * · ·. Figure 2 is a front view of the waste water piping for a heat exchanger installed under the • • sink.

. Fig. 3 is a perspective view of a heat- * «·; * * * · For changer.

Figure 4 shows a frontal and side view and a cross-sectional view of the A-A. converter.

Fig. 5a shows a front view of a heat exchanger mounted in a sewage pipe.

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Figure 5b shows a heat exchanger heat exchanger element mounted in a waste water pipe.

Figure 6 shows a cross-section of a fine filter mounted on the odor trap. Fig. 7 is a cross-sectional view of a fine filter mounted as a separate unit of un-5 after the odor trap, viewed from the top in the end and from the bottom in the top.

The unit preferably consists of a thermostatic mixer 7 with a jet 8, a single or multi-part heat exchanger 5 which can be opened, a pool 9, 10 with a coarse filter 11, a fine filter 13, an odor trap 12 which can be implemented in combination with a coarse filter 13 and a fine filter 13. a pivotable level regulator 16 and a waste water outlet 20 which is ducted into the drain pipe 17.

15 Hot water is supplied from tap 1 and cold water from tap 2 is introduced into the unit. The hot water is supplied directly through the mixing 7, while the cold water passes through the spring-assisted control valve 3 and enters via the fresh water inlet 4, the heat exchanger 5 and the outlet 6 of the heat exchanger 5. The heat transfer from the wastewater to the cold • · * .1 · · water flowing from the tap 2 takes place in the heat exchanger 5. Preheated • · * .1.1 20 cold water allows the required amount of hot water in the mixer 7 Reduce «• · · * ·! · 1 to obtain washing water at a certain temperature. Mixed Warm ·· 1 • · * ··· 1 wash water flows out of sprayer 8; followed by a washing event and the washing water accumulates in the inlet 9 of the basin 9 and in the coarse filter 11, which is matched with the outlet of the basin; from there, the effluent flows to the odor trap 12, designed to stop the spread of bad odors, and to the fine filter 13, which may be located inside the trap 12 or as a separate unit and which · ·! filters most of the impurities, such as hair and litter, from waste water; • · · * · ”1 due to hydrostatic pressure, wastewater flows forward through wastewater port 14 and * · heat exchanger 5 through a wastewater duct which is in contact with a heat exchanger • 31: where cold water flows in the opposite direction, allowing: 1 1 1 most of its thermal energy in fresh water; the significantly cooler waste water 118483 δ flows out of the heat exchanger 5 through the waste water outlet 15 and reaches a level regulator 16 which prevents waste water overflow at a height approximately equal to the required water level in the heat exchanger 5 and 5 filled with water so that it contains as little air as possible; the axially pivoting level regulator 16 is connected to the drain pipe 17, which allows drainage of the heat exchanger 5 by rotating the level regulator from the normal vertical position "N" to the horizontal drain position "E". Alternatively, the level regulator 16 may comprise a drain valve heat exchanger 5 for emptying.

Air also enters the wastewater pipeline with the wastewater and may block the flow of wastewater. To avoid this hold, such air is passed through the bypass air pipe 18 past the heat exchanger and the level regulator to the draining pipe 20 of the duct pipe 17. At least a portion of the bypass air pipe 18 is The waste water can only flow through the bypass pipe 18 when the heat • • • · *. 1. The 1 exchanger 5 cannot receive a rapidly increasing volume of water or in the event that the exchanger 5 is blocked. When the air reaches the heat exchanger • 1 · 5, it exits through the air outlet 19 or through the waste water outlet 14 through the bypass pipe 18 and the latter into the waste water drain pipe 20, which leads to the sewer • · · * "1 'to tube 17.

• · • · • 1 · .. 25 For maximum simplification and unification of the heat exchanger 5, it is useful to locate the heat exchanger • · · · | a dinelement 31 to a wider part of the sewage pipe 30, which is preferably a sewage pipe of normal diameter, or a special plastic container which can be opened. The wider portion of the sewage pipeline 30 includes a continuous heat exchanger element • ·: ** i 30 wastewater openings 14 and 15 at the ends and sides. The single side opening 14, which is located higher than the axis of the wider pipe section 30 or opens upwards, can serve as an air outlet and so a separate air outlet is not required. The end-cap opening 15 is preferably a waste water outlet and is preferably located lower than the axis of the wider pipe section 30 allowing complete drainage of the heat exchanger 5 to the drain pipe. Both fresh water connections 4 and 6 of the heat exchanger element 31 are guided through elastic seals 35 through an end cap 34 which allows simple and hygienic removal of the heat exchanger element 31 for cleaning or maintenance.

the heat exchanger element 31 consists of a plurality of parallel, preferably copper, 10 tubes or plates, preferably twisted in opposite directions about the axis and interconnected between the manifolds 33 connecting the tubes or plates. Preferably, the heat exchanger element 31 has a plastic core 32 for channeling the waste water, which is preferably shorter than the heat exchanger element 31 and allows the waste water to flow through the opening 36 of the accumulator 33. One of the connecting tubes 31 of the heat exchanger element 15 is passed through a plastic core 32. For the plate type heat exchanger element 31, the core is not required.

For removal of the heat exchanger element 31, fresh water strips are removed from the piping and then plugged with temporary plugs to prevent contamination; removing the end plug 34 and pulling the heat exchanger element 31 into a plastic bag longer than the heat exchanger element previously inserted into the waste water drainage pipe 30, where the integral heat exchanger element 31 is located, and then close tightly. This allows the contaminated heat exchanger element • · * 1 1 to be hygienically transported to the cleaning site.

25 * · • 1 1 • · · • «1 1 • • • • 1 1 • • 1 1 • • 1 1 • • • • i 1 • • • • i i • Il • · ·

Claims (14)

A heat exchanger waste water piping for bath equipment comprising a basin (9) having a bottom outlet (5) with a filter (11) connected to a smell trap (12) having an outlet connected to a bypass air pipe (18), a fine filter (13) and a wastewater heat exchanger (5) having an outlet with a level regulator (16) located in a drain (20) connected to a bypass air pipe (18) and a drain pipe (17), characterized in that the outlet (15) of the heat exchanger (5) mounted in the waste water pipe -10 time (16) and the bypass air pipe (18) is connected between the waste water odor trap (12) and the heat exchanger (5) and is connected to the air outlet (19) of the heat exchanger (5) and its other end is connected to the waste water drain pipe (20) through the drain pipe (17). Waste water piping for bath equipment with heat exchanger according to claim 1, characterized in that the level regulator (16) has a raised .V. the part which is connected to the waste water outlet (15) of the heat exchanger (5) holds the heat exchanger full of water at maximum water level, thus preventing the drainage of the waste water. * · · ··· 20 The wastewater pipe with heat exchanger according to claims 1 and 2; fitting for baths, characterized in that the level control (16) allows the heat exchanger (5) to be emptied either by turning it horizontally {* · .. or by opening a corresponding valve, whereby the waste water flow barrier of the level control (16) is removed. lower than the minimum water level of the heat exchanger (5). • · · • · · «· •« • ···. Waste water pipe with heat exchanger according to claims 1-3 The bath fixture, characterized in that the level adjuster (16) preferably has a rectangular support (50) or a flat base which provides a stable vertical position of the level adjuster (16). Π 118483 Waste water piping for bath equipment according to claim 1, characterized in that the bypass air pipe (18) is located higher than the bottom of the basin (9). 5 Heat exchanger piping for bath equipment according to claims 1 and 5, characterized in that the by-pass air pipe (18) is located along its entire length or at least in part higher than the bottom of the basin (9). 10 Waste water piping for bath equipment according to claim 1, characterized in that the air outlet (19) of the heat exchanger (5) is connected to a bypass air pipe (18). Waste water piping for bath equipment according to claim 1, characterized in that the odor trap (12) is provided with a coarse filter (11) and a fine filter (13) which can be removed from the bottom of the basin. • · * • · * · · · · · ··· Waste water piping with heat exchanger for bath equipment according to claim 1, characterized in that the fine filter (13) is located in the sewer pipe downstream of the outlet of the odor trap (12) and has a separate cleaning opening. • · · The heat exchanger pipe 25 for sanitary facilities according to claim 1, characterized in that the preferably cylindrical uniform heat exchanger element (31) is located in the wider · ·: *** part of the wastewater pipe (30). • · φ · • · · • M 10 1 18483 Waste water piping system for sanitary facilities according to claims 1 and 10, characterized in that the wider part of the waste water pipeline (30) which protects the integral heat exchanger element (31) has waste water openings (14 and 15) on the side or on the top and at the end. Waste water piping for bath equipment according to claims 1, 10 and 11, characterized in that both fresh water connections of the heat exchanger element (31) are sealed through the end cap (34), which allows simple and hygienic removal of the heat exchanger element for cleaning or cleaning. Waste water piping system for bath equipment according to claims 1, 10, 11 and 12, characterized in that the heat exchanger element (31) consists of a plurality of parallel copper pipes twisted in opposite directions or copper plates interconnected between manifolds (33). A heat exchanger-supported sewage pipe for bath equipment according to claims 1,10,11, 12 and 13, characterized in that the heat exchanger element (31) preferably has a plastic core (32) which is shorter than the heat exchanger 1 .V. dinel element (31), sewage for channeling the flow. • · aa · * · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · aaaaaaaaaaaa • a • aa a • · • · a • aa • aa • · a • «aaa 13 118483