SK106394A3 - Electrical instantaneous water heater - Google Patents

Abstract

An electric instantaneous water heater has a cold water inlet (1), a volumetric flow-dependent control device (3) for controlling the heating capacity, an insulating section (4), a heating section (5) and a second insulating section (6). The heating section is composed of several tubular modules (5a, 5b, 5c) with a rounded plastic tube (51) for receiving a heating spiral (50a, 50b, 50c). Helicoidal ribs (52) are shaped on the inner wall of said reception tube to increase the turbulence of the water flowing through the heating module. The first and second insulating sections (4, 6) are designed as flexible hoses pressure-tightly coupled each to a connecting branch (44, 63) of a heating module (5a, 5c). The individual heating modules can be easily exchanged.

Description

The invention relates to an electric instantaneous water heater with a cold water inlet, a control device, a first insulating section, a heating section connected in series, a second insulating section and a hot water outlet.

BACKGROUND OF THE INVENTION

M ov δ e e 1 ectrie k. flow, no plastic lobe, water flows. the heating of the section and the heater having a plurality of boreholes. A portion of the boreholes belongs to the mine after one heater, while the other boreholes form the first or second bore sections. the second electrical insulation section. Curves are formed at the upper parts of the plastic block, which connect the bores to each other in such a way that the meander-like first insulating section is followed by a meander-like heating section and then again by a meander-like second insulating section. In this way, often many straight lines are joined together on the upper parts by equally numerous bends. This known design is not without. shortcomings. The number, and the length of the pipe sections integrated in the sheath block in order to be guaranteed in the prescribed manner arise in the pipes which must be. dimensioned so that. ·. · ₍ ; I '.....

e 1 e k th e. It is also known that the water graft is well-formed.

on the worst side. It will be measured at the earliest proportions by me. e eg ten and ten cold j water as well as on the hot water side 1 at water quality (high conductivity). The block size must therefore be. customize always ^! Numerous bends ..... in the known design of fault points, each with 180 ° bends ..... increase the flow resistance and thus the inertia of the control action of the flow heater. The inertia inherent in the system can be compensated c

only reasonably costly regulatory equipment. This control device must ensure that it can be adjusted and you

? .....

to maintain the desired set temperature even when changing the circulation currents on the grid. Another important disadvantage of the known block constructions is that. This means that one of the plurality of heating coils and / or blockage of one of the plurality of flow channels in the plastic block. ic necessary to replace the entire plastic lobe. The costs of this replacement are approaching the purchase of a new electric instantaneous water heater of a more modern concept. Here the invention intervenes.

SUMMARY OF THE INVENTION

It is an object of the invention to reduce the construction and operating costs of the electric flow heater mentioned above. In doing so, they are to be attained by comparing or even improved performance characteristics.

This object is achieved according to the invention in that the heating section consists of:. j mene. A single tubular heater module having a substantially straight circular diameter tube incorporated in the water path to receive the heater element and connector. 1 at the ends of the pipe, that on the inner wall of the clamped heater pipe there are turbulence elements that break the axial fibers of the water flowing through the heating module and return back in the swirl and transverse sections Prudent; and that the first and second insulating sections are formed as resilient hadloo. which are always pressure-tightly connected to the heater module connection.

IDE ..... A ..... 3 (309 213 shows an electric instantaneous water heater with a cold water inlet, a first insulating section followed by a heating section connected in series, a second insulating section and a hot water outlet, the heating section consisting at least of a single tubular module having a substantially straight tube of circular diameter incorporated into the waterway; and

3 heating element clamps and connections branching from both ends of the pipe and wherein the first and second insulating sections are heated as flexible hoses. which are always pressure-tightly connected to the heater module connection. Influence of water flow by turbulence elements is not foreseen.

This last five even for electric instantaneous heater according to

DE ..... A ~ 1 232 720, which also operates with tubular heating modules. wherein the insulating sections are block coupled; heating modules as solid modules.

The invention deviates from the conventional concept of summarizing both the insulating sections and the heating section into sections.

the body block construction unit. Instead of the invention, the invention contemplates separately made and farther. assembly modules for the heating section and cheap, variable hoses for both insulating sections. This has numerous advantages. Flexible hoses can also be arranged optimally in the blood. which is 1. Lacquer required. whereby the number and radii of curvature are minimized. it means. that the mains hoses are guided as far as possible in large windings. to minimize flow resistances. The lengths of the insulating sections, consisting of hoses, can be adapted to a given specific odi-or-y of water. With good water quality. respectively. high specific water resistance short hoses are sufficient to comply with the prescribed /

insulation resistance; in case of unfavorable proportions (relatively cheap) hoses should be planned in correspondingly longer lengths.

Particular operating advantages result from the arrangement of the spiral turbulence elements on the inside, the wall of the heating coil clamping tube. The heat generated thereby increases the heat transfer from the heating coil to the turbulent liquid to be heated. As a result, the temperature on the heating coil of each heating module can be reduced with the same heat demand at the extraction point. A slight thermal stress with the same heat transfer increases the service life of the heating coil. In the event of malfunctions in one heating coil or plugs in one pipe section, it is sufficient to repair the module. or replace. These costs are negligible for comparison.

In a preferred embodiment of the invention, the turbulence elements are formed by at least one helix by the rib formed on the inner wall of the heating coil clamping tube. In particular, the rib has a rounded or pointed back. This embodiment of the fin has the advantage that the heating coils that rest on the inner wall during operation only touch the rear of the fin at a point. However, the turbulence elements may also comprise i. spiral grooves formed in the inner wall of the heating coil

..... and ......

correspondingly: a large ascent of the stroke and field in the barrel of the rifle. In the spirals of the turbulence elements, the directions of the spirals of the turbulence elements and the heating coils are predominantly defined in the opposite direction. A further alternative embodiment of the turbulence elements is characterized in that an approximately tubular plastic grid is installed on the inner stone of the heating coil tube and that the heating coil is arranged in a space bounded by the plastic tubular grid.

A preferred embodiment of the invention is characterized in that the heating section has a plurality of heating modules which are not disassembled by means of a non-interstage connection and connected in series. and installation of discharges :: .....

This can be favored by this. that both connections associated with the heater module are complementary sliding and clamping portions and / or complementary bayonet couplings. approximately radially branching towards the opposed sides of the clamped pipe. In this embodiment, all heating modules can have similar designs. Multiple heater modules are bayonet connected when mounting the device; as well as connections with suitable. h a d i. o o exchange. It has been used to connect both insulating sections to the cold and hot side of the heating section. In this way they can consist simply by changing the number of heating modules used, instantaneous water heaters with different sine, power, eharaks .....

L: in principle, the same components and heating modules.

In order to limit the necessary axial deflection of the heating coils during operation of the liquid in operation. In accordance with a further development of the invention, clips may be used, for example in the form of radial pins or the like, protrudingly arranged from the inner wall of the clamping tube of the heating coil. In order to optimize the effect of the clips, they should be offset both axially and circumferentially.

It is based on the modular construction of the functional components. and p o d 1. with a comparatively small housing. The tubular heater modules may be held in the bending shells at the bottom of the housing mold. This five i. for plastic molds forming an insulating section. which can be stored without breaking in loop windings.

Check valve, built in flow giant .....

vačoch. it may be incorporated into the coupling block forming the cold water inlet. When this block is connected by a flexible connection piece to the control section of the cold water pipe. interference noise from kickback can be reduced. because the sound of lr i.ac i. with a flight, it is minimally transmitted and hard time prf.stro ia.

In a preferred embodiment of the invention, the heating section has at least two individually controllable and / or satisfactory heating elements. of which at least one is controllable depending on the heat demand and.

It is possible to cover the area with n and J higher temperatures. a.

Due to the staggering of the heating elements and their possibilities of separate regulation and switching, the need for heat can be covered in any large ranges with a rapid reaction. If the heat demand is low, only one heating element with a suitably high heating capacity should be activated.

If, according to another advantageous improvement of the invention, they are connected in series in the liquid flow path. to be crushed. In the case of a plurality of heating elements, the last heating element operating at the highest temperature remains the most thermally stressed, activated only when necessary and for the shortest possible switch-on time. The least stressed heating element, on the other hand, is effective as soon as the electric instantaneous heater is switched on and over the entire release plate and regulates o and as required.

The reliability of the heater function is improved according to another aspect of the invention by providing a first temperature sensor for measuring the temperature of the liquid in the cold and water region and a second temperature sensor for measuring the temperature of the liquid in the hot water region. as well as means for forced cooling of the thermally sensitive electronic instructions in the control device, and that the forced cooling means begin to operate at least when the temperature of the cold water measured by the first temperature sensor exceeds the upper limit value.

By this measure according to the invention, an unwanted interruption of the operation of the apparatus (due to the protection against overheating of the electronic components) can be prevented even if the cold water inflow temperature is unusually punched and falls within a range above the limit temperature. If necessary, forced cooling of the thermally sensitive components is switched on, in particular by means of a fan and through an air duct. which in relation to heat transfer is related to the heat transfer. p r v k a m .1, k t o r t b e c h 1 a d i. Ť.

An increase in functionality can be achieved in a further improvement of the invention by considering means for measuring the electrical resistance of the water column between the two heating elements and the measuring result evaluation device. The resistance between the non-insulated conductors of the heating elements is dependent on the quality of the water to be heated and the length of the column of water between the two heating elements. Since the length of the water column is a constant quantity. resistance is a measure of water quality. A resistance measurement between two heating elements can be used i. for dry-running control to protect against operation vvhr levaclelio vinul.:.· ', | ::> r i

..... 7 .....

dry conditions. For this purpose, the evaluation device is equipped with means for interrupting the current 1 of the heating element and is effective when the resistance between the heating elements is greater than a predetermined limit value.

Especially high reliability of function, improved failure response and increased speed or speed. The rate of reaction can be achieved in a particular embodiment of the invention in that the control device has fuzzy logic for name processing.

and regulation of heating power.

If the instantaneous water heater is to operate at multiple sampling points, a volumetric flow limitation should be built in.

Another important aspect of the invention is a method of manufacturing a tube of a heater module in a through-flow heater according to the invention. In this case, in an external form which gives an external shape to both the pipe and the pipe, the core is immersed coaxially to the pipe in such a manner. that it has a regular circumferential distance to the external form on all sides. The core is provided with at least one spiral groove or rib in the form of a high pitch thread. The space between the outer mold and the core is then filled with plastic by the injection molding method. After curing, the core is withdrawn by a helical rotary motion about the axial end of the molding.

Further details and preferred embodiments of the invention are set forth in the claims below.

Overview of drawings and drawings

In the following, the invention will be explained in more detail by way of example of an embodiment schematically shown in the drawing. Me drawing show:

Fig. 1 is a schematic representation of the main functional elements of an exemplary embodiment of an electric heater according to the invention;

Fig. 2 battery from three mutually compatible plastic modules. which belong to the heating section of the instantaneous heater according to FIG. 1; and

Fig. 3 is a schematic circuit diagram of an exemplary embodiment having a first start of the first one: 1 m f u z y ..... X o g X k u.

Or, an embodiment of the invention

The instantaneous water heater shown in FIG. 1 another of the following main functional elements; cold water inlet 1. a control device 3 which serves in particular to regulate the heating power. a first insulating section 4 connected thereto in series by a module ba, bb b with the first, second and third heating elements and bo, arranged in harmony, further a second insulating section 6 serially connected to the heating section and a hot water outlet 7.

The cold water inlet 1 is formed as a metal block. in which, in addition, they are firstly used. j-use water stop valve 11, the water _{{(3g rv r} £ 3 - _υ in non íJXl.er 12 and the return cold water 1 IC

Downstream of the lobe for the inlet, generally a rigid section of the pipe 2, on which the control device 3 is installed and arranged differently. for instantaneous water heaters, common measuring and control elements. These include a pressure difference switch or a flow switch 20 which, when the water is removed and the hot water outlet 7 closes, the heating current circuit to the control device 3 and the overpressure switch 21 which interrupts the supply of the current 21 at least activation of power. It records temperature and fill. In the control device 3, triacs 31 are provided for separately controlling the heating power of the individual heating modules ba. b b and b c forming the heating section b. Activating the power of the heating coils 50a. . . 58 c is made by means of separate heating lines 45.

The function and solution of the control device 3 will be described below in connection with the image 3.

Activation of the power of the heating elements 50a ... 50c is effected by power transistors or triacs 81 which are known to be heat sensitive. In order to cool the triacs 31, in the example described here (similar to the prior art) ₍ cold water entering is used. T-presses are mounted on ¹

a heat exchanger 29. which is in contact with the heat transfer _; via line 2 and through this with cold water flowing. Cold and water in the normal temperature range <-20 ° C is most suitable for cooling the triac. moreover, the heat of the pressure should be dissipated J.en then. when the instantaneous water heater is operating and fresh _and cold water is still flowing through the cooling section. However, the cooling effect of the cold water flow is only sufficient. when the cold water temperature does not exceed the maximum value depending on the thermal resistance of the triac assembly and the power dissipation. This ole is always guaranteed. In case of insufficient cooling, a safety shut-off etc. is performed

thereby interrupting the flow heater function.

In the exemplary embodiment of Figure 1, an additional fan 8 is used, without sufficient baking, with sufficient cooling of the triac even at high cold water inlet temperatures, which is switched on as required by the control device 3 after the cold water temperature has been measured (sensor arrangement 23). If the temperature of the cold water exceeds a limit value of, for example, 20 ° C., the fan 8 is switched on. The air flow produced by the fan 8 is directed through a suitable ventilation channel 88 to the cooling fins of the heat exchanger 29 (oh.2). heat from triacs 31.

The heating elements 59a ... c formed as spirals consist

..... 1.0 from non-insulated heating resistive wires .. which guarantee excellent heat transfer to the liquid (water) to be heated. Certain insulating resistances are provided between non-insulated heating coils and another metal connection point in the water flow path. The piping through which the liquid flows between the respective heating modules and / or the corresponding heating modules must be correspondingly long. bo and cold or cold side connections. hot water. In the instantaneous water heater shown, these fluid paths are formed by flexible hoses of electrically insulating material. These hoses can be easily connected to the corresponding connections on one side and can be easily and economically stored on the other side. Thus, for example, they can be placed in loops after the heating by a section 5 in the cover (bottom of the mold) not shown in the drawing. The loop diameter is chosen to be large enough to limit the mechanical flow resistances and to maintain low pressure losses in the pipes forming the insulation sections.

Measurement sensors 31 ') with a temperature sensor and a pressure sensor are arranged at the outlets of the last heating module or in the flow path. The arrangement of the metering sensors 3U is connected to the control device 3. The arrangement of the metering sensors 30 is involved in controlling or regulating the heating power by means of a press.

An important aspect of the invention is a particular embodiment of the units.

of the heater modules ba. bb and bo. which will be explained below using Figure 3.

Clamping the heating coil pipe bi of the three heating modules ba. 5b and b are schematically shown. according to FIG. 2, they can be releasably connected by means of connections (clamping and insertion parts 53, 54). Suitable connection pieces 44 and 63 are detachably and impermeably connected to and from the first and last heater modules ba and b, respectively. How not easy to see. the heating modules can be unified and replaced by connecting and joining the complementary elements of the connection necks. Couplings 44 and 63 are connected in a known manner to hoses 4 and 6 forming insulating sections. The design of the connection baskets and connection necks as well as the sealing elements can be known to the skilled worker. Important is. that the necessary sealing at the joints at the pressures and temperatures prevailing in the heating section can be guaranteed. Other connections may be used instead of the plug connectors shown in Figure R. e.g. skrutkové spo. bolts with serrated nuts or bayonet closures. which are compressed at relative turning after the necessary sealing has been made.

Each heating model 5a. 5h and 5c is shown in Figure 2 freely and without the respective heating coils 5D and 5D h at p. 5 D c. A rib 52 with a triangular cross-section is formed on the inner wall of each clamped pipe 51, having a helical direction in the manner of a multi-pitch and steep thread. This rib 52 gives the heating coil 50a..50c an outer, jacketed support. The directions of the ribs 52 and the heating coils 50a ... 50c are particularly opposed. The coil supports of the heating coils on the rib 52 are located at the given intersections of the coils and have an approximately point shape. The tapered rib 52 protrudes into the flow path of the liquid to be heated when it flows substantially axially through the successively connected tubes 51. On the rib, the flow fibers are rotated transversely inwardly or inwardly. In the inner space of each clamped pipe 51, increased turbulence is generated. which leads to an improved heat transfer between the individual coils of the heating coils and the flow medium. This increased heat transfer associated with a significantly improved degree of heating effect is utilized in accordance with the invention. Operating temperatures

LI

..... 1.2 .....

spirals can be reduced compared to conventional designs.

Instead of the threaded rib 52 shown individually for each of the heating modules 5a ... 5c in Figure 2, multiple parallel ribs may be formed on the inner wall of each filled tube 51. The cross-sectional shape of each fin 52 is relatively uncritical. Instead of a relatively acute and posterior portion of the rib, a rounded rear portion may be used. rib. In addition, a comparable effect is achieved. that instead of ribs, wide grooves are incorporated into the circumferential wall of the pipe, and, similarly to a rifle barrel, alternately a pull and a shelf are formed.

Each clamping tube 51, with its complementary connections 53 and 54, as 1, is made, in particular, in a smaller manner, preferably by a special plastic injection method. During manufacture, a core is arranged in the external mold, which limits the inner space 55 of the filled tube 51 to the core, not shown in the drawing. is created. j m e n e. j one helical groove. in which a helical rib 52 is formed during the injection molding process. The outer mold (spaced apart) is attached to the coaxial core and the injection molding process is performed. After curing the fittings found ..! In this axial movement, the core rotates relative to the fitting 51 in the direction of the helical rib 52. It has been detected. that the core of the conical paw with a widening in the direction of the opening of the recess 56 of the full 5: 1 tube. substantially facilitates removal of the core from the mold. elbows due to the conical extension of the interior space 55 could not be detected to affect the function of the filled heating coil tube during heating operation; easy opening in the direction of fluid flow even increases the effect of turbufenol and the degree of heating effect.

As turbulence elements, they can be inserted or inserted into the interior 55 via the opening 5b. specially designed current interrupters. Thus, for example, a suitable grille can be inserted, which in particular has a grille adapted to the inner cross section of the vampire tube 51. On the other hand, a suitable insert can also be inserted centrally into the space surrounded by the heating coil.

The heating coil of each heating module 5a is inserted into the clamped tube 51 before the face open after injection is closed. The whole is usually sealed by means of sealing heads or disks, the heads or disks being welded or glued to the plastic pipe 5i. Indeed, such measures are known in the art, so no further explanation is needed here.

A heating section may be provided in the housing of the device. consisting of a battery of, for example, three modules, inserted into suitable retaining shells at the bottom of the mold. Additional retaining shells may already be provided in the housing. to accommodate additional heater modules o and to increase the heating power in the housing. The hoses 4 and b can also be inserted in suitable circular chambers at the bottom of the mold of the cover (not shown in the drawing).

50a and 50c are used to axially hold the heating coils 5b, 50b and 50c, which are fixedly mounted on the clamping pipe 51 by means of a variety of means. 58 protruding pins. These pins may be inserted externally over the wall of the oven and sealed additionally, i. after fixing the heating coils. On the other hand, however, the clamping tube may consist of a plurality of axial sections which, after construction and attachment of the retaining elements 57

..... :: 1./1 ......

coaxially mounted approximately in the dividing plane and sealed.

In the following, reference will be made to Figure 3, in which the measurement, control and indication components as well as the diagrams are shown. power circuits of the described embodiment.

In the exemplary embodiment of Figure 3, the T-shirts 31 of the control device 3 are controlled by the control arrangement 3a.

This includes an input unit 32 for adjusting the measured values

values. to which, in addition to the measured values of direction 1, the desired value of the water temperature T ::; set by the user.

time and effluent control unit 33 ..... and as its own controller ·· fuzzy ..... logic 34. Fuzzy ..... logic acts on one or more of the triacs 3i by activating power 35 The presses 31 supply in accordance with their activation, individual heating elements 5a, 5b and / or 5o associated therewith to meet the heat demand. The latter is known to be dependent on the volumetric flow (through line 2) and the desired thermal value Ts set by the user. Fuzzy ..... logic 34 controls, in addition to the power activation stage 35, the insurance function block 35. The control 35 controls the ship to c. for function 37 and in certain operating fault situations. A breaker switch 38 which is arranged between activating power 35 and all triacs. 31. In connection with the activation of the power 35, the information is released by releasing the traces 31 on the Ld.nk of the insurance function 35.

Fuzzy ..... logic 34 is associated with feedback 39 with adjusting the measured values 34. By this feedback, fuzzy ..... logic can affect the way the measured values are adjusted. In addition, the experience of the previous operating cycles in adjusting the measured values as well as for controlling the time and the course stored in the respective memory can be recouped in order to, for example, damp the over-regulation and optimize the reaction time.

....., ..... 1..5

In the example of hunting shown in the picture: ·! k h Ink o 32 rta The following measured values are directed to adjust the measured values: inlet temperature Te (measuring point 23). outlet temperature Ta (measuring point 313). inlet pressure Pe. rr. nnv pressure Pa and finally, through a pair of measuring lines 16, measured the value of 1 p of the conductivity of the water column between the two heating elements (e.g. ha and hc).

The differential pressure Δ P Pe ..... Pa can be used to detect the start of the hot water demand (open the outlet of the science at the sampling point) and thus switch on the control electronics. Since in the cold water piping system there is generally a certain nominal pressure input, the conventional measurement of the inlet pressure Pe can be omitted. In block 32 Ex.

in the microprocessor assigned to ťuzzy ..... logic, the differential pressure Δ.Ρ can be transformed 1 into a surrogate value corresponding to the volumetric flow V. However, the volumetric flow required for temperature control can be calculated as three. For this purpose, excitation pulses can be integrated at the power activation input. Critical fluctuations in network n and foot. and can be suitably compensated by means of 1 logic 31 ....

In the exemplary embodiment described, the conductivity can be determined via a pair of lines 16 before switching on the power. the resistance between: two increments of turbulent water column points in the heating section 5. At a high resistance surge, the triacs 31 are switched off by interrupting the switch 36 to prevent dry running and thus the risk of destruction of the elements. It may also be necessary to interfere with the insurance functions at a high conductivity, i. j. if the resistance between measuring lines 46 is too low (short circuit danger, overload fuse).

The heat exchanger 29 is thermally connected to the cold water section

i. 8 (pipe section 2) so. that it can upload. heat developed: triakinl. 31 during cold water operation - Inlet temperature Te normally In fnrmu, the processor is in fuzz ..... logic 34 about it.

If the inlet temperature Te is too high, for example ≥ 20 ° C., the iuzzy ..... logic 34 actuates the safety sensor 38, which in turn turns on a fan 8 and takes care of the forced cooling of the presses 3 and 3 again. e., úl.l not new: pr i .. prie to .....

naturally can be used with the same advantages 1 in otherwise designed instantaneous water heaters if the measured value depending on the temperature of the inlet water is entered into the processor, or if necessary. relevant input unit. Forced cooling, for which a liquid medium by means of a pump can be used, is interrupted in particular when the primary cooling medium is cold water. to be heated in the heating section h drops below a predetermined threshold on the input side.

In the illustrated embodiment, the output means that the .....

of your section 5 resp. A volume flow restrictor 82 is provided upstream of the hot water outlet. The power reserves of the instantaneous water heater can be fully utilized by this, which is particularly important at multiple sampling points. A simple throttling point may serve as a volumetric flow restrictor.

The comfort control device of Figure 3 is additionally equipped with a water softening device. It consists of a sensor 42 which generates rectangular pulses, for example at a pulse frequency of 2 to. 10 glides and thus creates a suitable electromagnetic field in the honored :::: 1 :: 1 .. inlet of the cold water. The electromagnetic field takes care of the softening of the water and thus reduces the calcareous sediments in the immediate middle. a :::: 11 applied to the heating section 5.

Numerous variations are possible within the spirit of the invention. Thus, it may be possible. For reasons of cost, abandon the comfort-enhancing functions. Many functions can be achieved by simply designing fuzzy ..... loglkv. t. j. without a special increase in production and equipment costs.

Instead of fuzzy logic, a conventional control device can also be used, especially when functions can be run up to the desired flow temperature:

clear enough in advance or. model and »

there are no significant instabilities or preregulo .....

tion. In addition, if necessary, several seconds of deceleration of the switch-on can be envisaged, especially after a power cut. In the case of increased pressure in the heating section 5. it can be stated the duty to restrict the activity: pressure.

Claims (16)

An electric instantaneous water heater with a cold water inlet (J), a control device (3), a first insulating section (4). the heating section (h) connected in series, the second insulating section (6) and the hot water outlet (7). characterized in that the heating section consists of at least one heating module (h1, h1, h1), which has a substantially straight and round tube (h1) and a clamping of the heater element (50a, 50b. and attachments C 53, 54) branching from both ends of the pipe, on the inner wall of the heating element filling tube (51) are arranged turbulence elements (52) which interrupt the axial fibers of the water flow flowing through the heating module and return and that the first and second insulating sections (40) are designed as resilient la adi, which are each pressure-tightly connected to the connections (53, 54) of the heating module. 2. A instantaneous water heater according to claim 1. The method of internal thread in such a manner is provided in the inner wall or inside or outside of the heating tube filling tube (51). that in the water flowing through the pipe, the components of both the swirling and transverse flow are stimulated and induce increased turbulence in the inner space of the tube (55). A instantaneous water heater according to claim 1 or 2. The heating section (5) has a plurality of heating modules (5a, 5b, 5c). When they are disassembled and physically propagated with each other, they are complementary to the molded rings (53, 54) and connected in series. ! Ί · A instantaneous water heater according to claim 3. that both connections assigned to the <; ί. Vanli 5a of the module (5a) of the module (5a) from the complementary insertion and clamping portion (53, 54) and / or the complementary bayonet taps to approach the radially and wound tubes (51). .. Pr .i.e instantaneous water heater. claims First characterized in that it has inlets protruding from the inner wall of the clamped tubes of the heating element to limit the axially heated coil (50a). One of the claims 1 in m. that if e vvhr 6. The instantaneous water heater according to the invention and the coils (50a, 550b, 50c) are resistive wires with a glossy or superoxidized surface. to 4. y (57) y (.! t I) I iv lenia .. Ir.'vnn.ir. · I <O Via VO 7 levae podlá j radi n) 1 ί <) of claims: .1 .. .1 ž la .. .... ... j e: 1 .. s a i ý m. that d l..žl <a flexible laadin forming o la idva insulating sections (4) 0) In d .i.im: ra: Nivaria so. that is to tentative i are liquid l.riy (water) of the highest maybe vodlvos t: i. 0. P r 1 k o l <o y o I n- levač podlá one z i aá r 'okov 1 7 ž 7. .... j u c :: i s a t ý m .. ž e any clamping; i oven (51) heating element and olaidoe connections (53., I PI) are created in, ie day by day like shaped o ý I: i. . i: and 1 · -. vstrok i :> Va11.m plastic and that clamping oven vyhr in vaniel and element is about a both axial horses pressure tight closed. 0. At. e t o k o o o r levae pod n á r oku 0 .. s y i n i .. J .. s and t ý m. that the same: i emer of the clamped pipe (51) vylarle ..... vaeleho element is towards eat him for o n r :; by the oven (56) la lak o i i c c y ší.... 10. The instantaneous water heater of claim 5, wherein the retaining means are a plurality of axially spaced apart. above all circumferential displaced projections (57 ?. 1: 1st The instantaneous water heater according to claim 10. that each spiral heater filling tube (51) consists of a plurality of axial tube sections which are rigidly and impermeable to each other and that the retaining means (57) are arranged adjacent to the tube sections. D a rt a n d a n d 1 and shipping claims I to I. I. S e c t i s c 1 s and modules (5a. 5 b. 5c). That tubular heater held in the limbs of Loelel and cut up the bottom of the mold cover. A instantaneous water heater according to claim 12, characterized in that the instantaneous heater is of the type described in claim 1. that both plastic hoses (4.b) forming an insulator ..... lačný stretch. They are embedded in the bottom of the mold in the windings and are provided with means o and firmly accommodate the serpentine in a looped wave ti. oh. la e from breaks. A instantaneous water heater according to one of claims 1 to 13. that the control device (3) is associated with a substantially bend-rigid section of the pipe (2) which is incorporated between. a cold water inlet (1) and a first insulating section (4) in the liquid flow path. 15. A instantaneous water heater according to any one of claims 1 to 171. that the heating section (5?) has at least two separately controllable and / or clipping heating elements (5a ..... c), at least one of which is controllable depending on the heat demand and one is connectable as the last heating stage (5c: :) to cover areas with the highest heat demand. 16. The instantaneous water heater of claim 16. characterized in that a first sensor l.nnln1 is provided in the cold water region. v (2'3 ~) for liquid temperature measurement. and a second temperature sensor (36) at the liquid temperature (Ta) level in the region of the warm end. as well as means of forced e ii 1 t e n 1u t e μ: »e 1 ne c. t J ,. :: i. c e i e 1 k t rnn i e l <c. The elements (31) of the control device (3) and the forced cooling means (5e) are actuated at least once. when the cold water temperature (e1) measured by the first temperature sensor (23) exceeds the upper limit value. 17. The instantaneous water heater according to claim 16, characterized in that the forced cooling means have a fan (6) and an air duct (80) which is electronically related to heat transfer. a structural element (31) that can be cooled. 18. Instantaneous water heater according to year 16 or 17 .. characterized in that the heating power of the heating elements (5a ..... c) is controllable depending on the control deviation between the desired temperature (Io) and the hot water temperature (Ie) recorded by the second temperature sensor (30). A instantaneous water heater according to any one of claims 15 to 18. that both the first and second liquid pressure transducers for measuring liquid pressures (Pe and Pa) are on the hot water side and that the control device (3) has means 1 for activating the power (31, 35) of the heating elements which are released as a function of from the preset differential pressure (Δ P «Pe ..... Pa). 26. A instantaneous water heater according to claim 18. The control device (3) has the means 1 and 2 for the control device (3). a v y h i i e, e h o i o t i, a. 21. The instantaneous water heater according to any one of claims 15 to 26, characterized in that it has means for measuring the electrical resistance of the water column between two heating elements. (5) (la ..... c) and the arrangement on me ..... measurement results. A instantaneous water heater according to one of claims 15 to 2: 1. characterized in that the control device (3) has fuzzy ..... logic (3i) for processing the measured values and for controlling the power of the heating windings. 23. A instantaneous water heater according to claim 22. that fuzzy ..... logic has the means (36) to asset ..... also in the indication of insurance functions (37). A method for producing a tubular heater module for use in an electric instantaneous heater according to any one of claims 1 to 23, characterized in that it is provided. characterized in that the clamping tube of the heating coils is made in one piece by: (a) a core having at least one helical groove or rib and a high pitch threading method is produced; (b) the core is submerged in an external mold with a radius of circumferential distance from all sides: (c) the space between, the outer mold and the core is then filled with injection molded plastic; (d) the injection-molded mass is allowed to cure: a (e) the core is pulled axially out of the orifice after curing ..... of the molded part by rotary motion in the direction of the spiral. 25. A method according to claim 24. This means that the core has a slightly enlarged cross-section in the pulling direction.