ARRANGEMENT FOR THE DETACHABLE ATTACHMENT OF A MEASURING ELEMENT TO A BASE BODY, AS WELL AS A HEATING CARTRIDGE AND AN INSTANT HEATER

Description

[0001] The invention relates to an arrangement for the detachable fastening of a measuring element, in particular a sensor unit, to a base body, comprising the measuring element, the base body with a recess designed for at least partial reception of the measuring element and extending along a longitudinal axis, and at least one fixing element designed and configured for fixing the measuring element.

[0002] Furthermore, the invention relates to a heating cartridge for heating a fluid.

[0003] The invention also relates to an instantaneous water heater.

[0004] Household appliances, including instantaneous water heaters and other water heating systems, typically incorporate various automatic or user-controlled settings and evaluation options. These settings and evaluation options are monitored and / or adjusted using appropriate electronics and / or sensors. Modern household appliances of the current state of development regularly include one or more measuring elements, such as sensors, that monitor the status of the appliance's functional area, enabling the end user to adjust or evaluate its operation. Such appliances also include, for example, one or more user interface components, such as control or measurement systems, that allow the user to monitor or control a performance aspect of the appliance.

[0005] For household appliances to reliably, stably, and reproducibly measure relevant parameters, these measuring elements must be positioned at the designated points within the appliance. Depending on the type of appliance, it is necessary to protect the measuring elements from physical forces or conditions. For example, if such measuring elements are used to measure temperature and / or pressure in water heaters, they must be securely and tightly mounted within or attached to the relevant components to withstand the forces exerted upon them. Furthermore, these measuring elements must be regularly replaced or renewed in case of defects or during maintenance.

[0006] The arrangement and mounting of measuring elements in household appliances, especially in water-bearing appliances such as instantaneous water heaters, often represents a weak point, as such mountings are not sufficiently resistant to the forces occurring, do not provide adequate sealing, or do not allow for detachable assembly. In existing solutions, for example, the measuring elements are bonded to the corresponding components of the household appliance, making replacement or maintenance difficult or even impossible.

[0007] Furthermore, solutions for attaching measuring elements to components, particularly in household appliances, are known that require extensive machining steps and high production volumes, which in turn contributes to high manufacturing costs and defective production processes. Moreover, there are known mounting methods for measuring elements that are neither sufficiently resistant to forces or temperature fluctuations nor adequately corrosion-resistant, significantly reducing their service life. Overall, the known mounting methods for measuring elements either result in high machining effort and thus high costs, or in an inadequate mounting quality, leading to short service lives or costly consequential damage.

[0008] US Patent 2015 / 0377658 A1 describes a connection system designed for the secure and rapid assembly and disassembly of a sensor. It comprises a sensor head assembly with a detector housing that has an internal channel and an open distal end. Within the channel is a sensor head connector with a first electrical connector and a fixed key component. The system also includes a sensor cartridge that can be partially inserted into the channel and features a second electrical connector and a second key component. The key components are inserted into each other before the contact elements are connected.

[0009] DE 10 2020 118 751 A1 discloses a safety element for a plug connection, a circuit board arrangement and a probe, in particular for optical measurements in a measuring medium.

[0010] WO 2012 / 109760 A1 discloses methods and devices for integrating an electromagnetic navigation system with a target alignment tool. The system comprises a sensor system, a field generator, a display, and a computer. The sensor system is attached to the target component in a specific position, while the field generator is rotatable about the tool axis.

[0011] CN 202048682 U describes a heating unit for water heaters, consisting of a heating cylinder with heating pipe and water supply and drainage lines.

[0012] The existing designs therefore have the disadvantage that attaching measuring elements to base bodies is time-consuming and expensive, and often lacks sufficient technical properties. Furthermore, repeated disassembly and assembly pose a risk of damage to the base body, the appliance, and the measuring element.

[0013] For reliable and trouble-free operation of a measuring element, it is crucial that the measuring element is securely attached to the designated mounting point within the base body. Such base bodies / household appliances can accommodate multiple measuring elements, making simple, careful, and time-saving mounting essential. Furthermore, conventional base bodies typically offer limited workspace for such measuring elements, making mounting them during assembly often problematic and time-consuming, increasing the risk of damage, particularly to electrical or electronic components within the household appliance or the measuring element itself. Additionally, mounting positions are frequently chosen that do not provide optimal access to the mounting point.Due to the difficult-to-access mounting positions, which are regularly located on internal areas of the base body, the process of attaching measuring elements is often error-prone and time-consuming.

[0014] It is therefore an object of the present invention to provide an arrangement for the detachable fastening of a measuring element to a base body, which on the one hand ensures reliable fastening of the measuring element to the base body and on the other hand is quick and easy to implement. The object further includes providing a suitable heating cartridge and a flow heater.

[0015] This problem is solved by the aforementioned arrangement in that the base body further comprises at least one shear receiving element with at least one shear opening and at least one detent opening, wherein the at least one shear receiving element at least partially projects beyond the recess for forming a shear receiving element, and the fixing element comprises at least one detent element spring-loaded between at least one detent position and an undetent position and at least one fixing section designed and configured for at least partial contact with the measuring element and / or the shear receiving element, wherein the shear receiving element is designed and configured for at least partial reception of the fixing element by allowing the fixing element to be transferred into the shear receiving element via the shear opening.to arrange the at least one detent element, starting from the detent position and transitioning to the detent position, at least partially in the at least one detent opening, wherein the fixing element is secured against automatic release from the shear receptacle, and wherein the fixing element with the at least one fixing section, when arranged at least partially in the shear receptacle, can be brought into contact with the measuring element and the shear receptacle element in such a way that the measuring element is essentially secured against movement.

[0016] The arrangement offers, in particular, a reliable, convenient, and secure method for attaching a measuring element, especially a sensor unit, to a base body. This enables simple and cost-effective assembly in conjunction with the fixing element, preferably ensuring tool-free and simultaneously releasable attachment of the measuring element. Advantageously, the measuring element and / or the sliding mounting element comprises at least one corresponding section for contact with the at least one fixing section of the fixing element. In this way, the measuring element can be quickly attached to the base body, thus reducing assembly time. In other words, the arrangement according to the invention provides a so-called "drawer solution" that includes a locking mechanism for the secure yet releasable attachment of the measuring element.In preferred embodiments, a single base body can have several arrangements according to the invention for the detachable fastening of a measuring element.

[0017] The sliding element of the base body with its sliding opening prevents incorrect operation or assembly, as it defines the insertion section for the fixing element, thus securing the measuring element inserted in the recess. The fixing element, with its at least one locking element, can be guided into the sliding opening and engaged with it. Once the fixing element or the locking element has been moved into the locking position within the locking opening, the releasable fastening of the measuring element has been successfully completed. The locking element secures the fixing element against accidental release from the sliding element, ensuring the measuring element is securely positioned in the recess. Furthermore, when the measuring element is inserted, the sliding element provides protection against damage, as it shields the measuring element—at least partially.Furthermore, the arrangement, through the alignment of the fixing element in the shear receiving element, provides a passage for any further components of the measuring element, which could be cables, for example.

[0018] The recess in the base body for at least partially receiving the measuring element is preferably a so-called dome, which has at least a partial hollow body and is designed for the precise reception of the corresponding measuring element. The sliding receiving element advantageously projects beyond the recess at least such that the fixing element is designed and configured to fix the measuring element by means of this projection. The fixing element can be designed as a U-shaped locking clamp, locking clamp, mounting clamp, mounting bracket, etc.

[0019] The design or functionality of the measuring element is not relevant to the invention, provided it is arranged in the recess of the base body. Depending on the intended application, the measuring element can therefore be a suitable component for qualitatively or quantitatively detecting or measuring the physical or chemical properties (physical, e.g., heat quantity, temperature, humidity, pressure, sound field quantities, brightness, acceleration; or chemical, e.g., pH value, ionic strength, electrochemical potential) and / or the material composition of its environment. Furthermore, the term "measuring element" can also include switches, e.g., safety pressure switches, which selectively switch off any electrical or electronic components when predetermined values ​​are exceeded. Preferably, the measuring element is designed and configured as a ceramic sensor for detecting temperature.The measuring element preferably seals the recess in the base body when inserted and secured. For this purpose, the arrangement preferably includes at least one sealing element, which can be brought into contact with the at least one fixing section and / or arranged in the recess of the base body. In further advantageous embodiments, the measuring element can be non-functional, i.e., designed and configured as a blank measuring element to provide a way to close the recess in the base body. This is particularly the case when such measuring elements are provided only as an upgrade or as an option in the corresponding base body.

[0020] The material of the arrangement according to the invention, in particular of the base body and the fixing element, preferably comprises predominantly plastics (e.g., ABS, PS, PP, etc.), especially durable plastics that possess corresponding strength, temperature resistance, and durability properties. Preferably, the base body and / or the at least one fixing element is each essentially a (one-piece) injection-molded part.

[0021] A preferred embodiment is characterized in that the at least one fixing element comprises two detent elements, which are designed and configured to engage at least partially with the at least one detent opening of the thrust receiving element. The two detent elements provide support for the detent elements in two areas of the thrust receiving element, thereby further increasing the detent effect. In particular, the two detent elements can each be arranged in two separate detent openings of the thrust receiving element. This increases the force distribution and provides additional protection in the event of unintentional release of one of the detent positions.In further advantageous embodiments, it may also be useful for the fixing element to comprise more than two locking elements, particularly in the case of larger fixing elements and / or an additional locking mechanism in a plane other than the plane of the at least one other locking element.

[0022] An advantageous embodiment is characterized by the fact that the two locking elements extend leg-like from the at least one fixing section, and are designed and configured to be spring-loaded relative to each other. The leg-like extension of the locking elements allows them to move to the locking and unlocking positions. Preferably, the fixing element is in the locking position in its initial position and automatically returns to the locking position when moved to the unlocking position. The locking elements and the at least one fixing section preferably lie essentially in the same plane. More preferably, the fixing element is designed and configured to be essentially mirror-symmetrical along a symmetry axis, such that the two locking elements and / or the at least one fixing section are mirror-symmetrical relative to each other.

[0023] In a further advantageous embodiment of the invention, in the detent position within the detent opening, the at least one detent element can be removed from the slide receptacle by moving the at least one detent element into the release position. In this way, the fastening mechanism of the arrangement can be easily released, allowing the measuring element to be replaced or enabling a quick change of the fixing element. This significantly increases the flexibility of the arrangement, and components can be replaced quickly and cost-effectively.

[0024] A preferred embodiment of the invention is characterized in that the at least one fixing element, in particular the at least one locking element, comprises at least one locking means, wherein the at least one locking means is designed and configured such that, when arranged at least partially in the locking opening, it engages behind the opening to lock the at least one locking element in the locking opening in the locking position. The at least one locking means allows the locking element to be arranged in the at least one locking opening of the sliding element, thereby further increasing the secure attachment of the measuring element. The at least one locking means, in particular, ensures the automatic removal of the fixing element from the sliding element.The fixing element can only be returned to its original position in the slide receptacle if the at least one engaging locking element is moved out of the at least one detent opening, which can be achieved by moving the detent elements into the disengaged position. Preferably, the at least one locking element is arranged on an outwardly facing area of ​​the at least one detent element. More preferably, each of the detent elements has a separate locking element, each designed and configured to engage a separate detent opening of the slide receptacle element.

[0025] A further advantageous embodiment of the invention is characterized in that the fixing element, in particular the at least one detent element, generates and sets an acoustic signal when arranged at least partially within the detent opening. This further increases the reliability of the arrangement, since the user receives at least acoustic feedback when the fixing element or the detent element is in the intended position. The acoustic signal can be generated, in particular, automatically by the at least one locking means of the at least one spring-loaded detent element engaging behind it.

[0026] According to a further preferred embodiment of the invention, the at least one fixing section of the at least one fixing element has at least one fixing recess which is designed and configured to partially enclose a portion of the measuring element that projects from the recess of the base body along its longitudinal axis. The fixing recess serves, on the one hand, to additionally secure the measuring element and, on the other hand, enables the targeted guidance of other components of the measuring element, for example, cables. The fixing recess is preferably substantially U-shaped or semicircular. Furthermore, the at least one fixing recess preferably prevents movement of the measuring element from the recess of the base body along its longitudinal axis.

[0027] A preferred embodiment of the invention is characterized in that the at least one fixing element, when arranged in the slide receptacle, secures the measuring element in the recess such that the measuring element is secured against displacement along its longitudinal axis by force-locking and / or positive locking. The at least one locking means, on the one hand, prevents movement of the fixing element by means of a positive locking arrangement in the at least one detent opening, and on the other hand, the fixing element arranged in the slide receptacle prevents movement of the measuring element by bearing against the measuring element and the slide receptacle element, which at least partially projects beyond it. In addition, further force-locking connections, e.g., screw-shaped covers, can be provided to form and establish an additional fastening of the measuring element.

[0028] A preferred embodiment of the invention is characterized in that the thrust receiving element has at least a partial opening on the side facing away from the base body, in order to arrange the measuring element in the recess from the side facing away from the base body through the opening in the thrust receiving element. The opening serves, firstly, to facilitate the convenient and quick arrangement of the measuring element in the recess, and secondly, to allow any cables or the like to be routed and positioned through the opening.

[0029] An advantageous further development is characterized by the fact that the shear absorption spans a shear plane that runs essentially orthogonal to the longitudinal axis of the recess. This essentially orthogonal shear plane facilitates the alignment of the required surfaces for contact. Furthermore, this ensures an optimized and virtually gap-free contact between the individual components, enabling the appropriate absorption of forces acting on the desired components.

[0030] In a further preferred embodiment of the invention, the recess projects into a fluid-filled interior of the base body, wherein the measuring element, in its installed state, can be arranged at least partially within the interior and substantially closes the recess. This secures the measuring element in position and, on the one hand, enables a reliable arrangement for obtaining reproducible and consistent measurement results during operation, and on the other hand, also provides reliable closure of the recess in the base body. In the case of a fluid-filled interior, the measuring element is particularly designed as a temperature sensor to reliably detect the temperature of the fluid prevailing in the interior. Preferably, the measuring element is designed to fit the recess or comprises, at least in some areas, a surface that is designed and configured to substantially completely close the recess.

[0031] The problem is also solved by the heating cartridge according to the invention mentioned at the outset, comprising at least one arrangement according to the invention. This enables, in particular, a reliable, simple, and safe arrangement of the measuring element. The measuring element is preferably a measuring element adapted to a heating cartridge for detecting / measuring parameters for the operation of a heating cartridge, especially temperature.

[0032] To avoid repetition, particular reference is made in connection with the heating cartridge according to the invention to the advantages already described in connection with the arrangement according to the invention. These also apply analogously to the heating cartridge according to the invention.

[0033] The problem is further solved by the instantaneous water heater according to the invention mentioned at the outset, comprising a heating cartridge with at least one arrangement according to the invention. This enables, in particular, a reliable, simple, and safe arrangement of the measuring element in the heating cartridge of the instantaneous water heater. The measuring element is preferably a measuring element adapted to a heating cartridge of an instantaneous water heater for detecting / measuring parameters, especially temperature, for the operation of a heating cartridge or an instantaneous water heater.

[0034] To avoid repetition, particular reference is made in connection with the instantaneous water heater according to the invention to the advantages already described in connection with the arrangement and the heating cartridge according to the invention. These also apply analogously to the instantaneous water heater according to the invention.

[0035] Further advantageous features and embodiments, as well as preferred items of the arrangement, heating cartridge, and instantaneous water heater according to the invention, will become apparent from the dependent claims and the description. Particularly preferred embodiments of the arrangement, heating cartridge, and instantaneous water heater are explained in more detail with reference to the accompanying drawings. The drawings show: Fig. 1 a schematic representation of an arrangement according to the invention or a heating cartridge according to the invention with a fixing element in perspective view, Fig. 2 a schematic top view of the in Fig. 1 shown arrangement according to the invention or the heating cartridge according to the invention with a detached fixing element, Fig. 2 schematic top view of the in Fig. 2a The arrangement shown according to the invention, or the heating cartridge according to the invention with a partially inserted fixing element, Fig. 2, is a schematic top view of the arrangement shown in Fig. 2. Fig. 2a und Fig. 2b The arrangement shown according to the invention, or the heating cartridge according to the invention with an inserted fixing element and an attached measuring element, is shown in Fig. 3a, a schematic detail view of a fixing element of the arrangement according to the invention in a locking position, and in Fig. 3b, a schematic detail view of the in Fig. 3a shown fixing element in a de-snap position.

[0036] The aforementioned figures are used to describe in more detail the arrangement according to the invention, the heating cartridge according to the invention and the instantaneous water heater according to the invention.

[0037] The arrangement 10 shown in the drawings is designed and configured for the detachable fastening of a measuring element 11, in particular a sensor unit, to a base body 12. The base body is, as shown in the Fig. 1 As can be seen, this is exemplified by a heating cartridge 13 of an instantaneous water heater (not shown separately in the figures). The invention relates in the same way to comparable base bodies 12, which are also provided for the detachable attachment of a measuring element 11.

[0038] Fig. 1 Figure 1 schematically shows an embodiment of a heating cartridge 13 with an arrangement 10 according to the invention. Such heating cartridges 13 are regularly components of (electric) instantaneous water heaters and are designed for heating water. Measuring elements 11 are used, for example, to monitor the hot water production within the heating cartridge, and further measurements can also be taken. The arrangement 10 according to the invention comprises the measuring element 11, the base body 12 with a recess 14 extending along a longitudinal axis L and designed to at least partially receive the measuring element 11, and at least one fixing element 15 designed and configured for fixing the measuring element 11. An embodiment of the fixing element 15 is shown in the following figures. Fig. 3a und Fig. 3b shown. Further details are in the Fig. 2a, Fig. 2b und Fig. 2c The fixing element 15 is shown during the different steps of attaching the measuring element 11.

[0039] The base body 12 further comprises at least one shear receiving element 16 with at least one shear opening 17 and at least one locking opening 18, wherein the at least one shear receiving element 16 at least partially projects beyond the recess 14 to form a shear receiving 19. The Fig. 1 The heating cartridge shown has two thrust receiving elements 16 with a recess 14, each of which is provided for receiving a measuring element 11 and for forming an arrangement 10 according to the invention. In the top views of the Fig. 2a, Fig. 2b und Fig. 2c The shear-absorbing element 16 is shown in a partial sectional view. The protruding area of ​​the shear-absorbing element 16 is shown in the Fig. 2 a, Fig. 2b und Fig. 2c not shown. The thrust receiving element 16 is preferably formed integrally with the base body 12.

[0040] Furthermore, the fixing element 15 comprises at least one spring-loaded locking element 22 between at least one detent position 20 and one release position 21, and at least one fixing section 23 designed and configured for at least partial contact with the measuring element 44 and / or the thrust receiving element 16. Fig. 2b and Fig. 3a The fixing element 15 is shown in the detent position 20 and in the Fig. 2a, Fig. 2c and Fig. 3b The fixing element 15 is shown in the detent position 21. The at least one detent element 22 is preferably designed and configured to taper towards the free end 24, which, among other things, facilitates easier access to the detent opening 18.

[0041] The shear receptacle 19 is designed and configured to receive the fixing element 15, at least partially, by allowing the fixing element 15 to be moved into the shear receptacle 19 via the shear opening 17. This enables the at least one detent element to be releasably positioned, at least partially, in the at least one detent opening 18, starting from the detent position 21 and transitioning to the detent position 20. The fixing element 15 is secured against automatic release from the shear receptacle 19. Furthermore, the fixing element 15, with its at least one fixing section 23, can be brought into contact with the measuring element 11 and the shear receptacle element 16 in the shear receptacle 19, at least partially, such that the measuring element 11 is essentially secured against movement. The shear opening 17 provides the opening for inserting the fixing element 15 into the shear receptacle 19 (see Figure 1). Fig. 2a ). In the Fig. 2b The fixing element 15 is partially located in the push-fit receptacle 19, while a part of the fixing element 15, in particular a part of the at least one locking element 22 (in the exemplary embodiment two locking elements 22 are provided), projects out of the locking opening 18. Fig. 2c The fixing element 15 is arranged as intended within the shear receptacle 19, and the at least one locking element 22 is engaged in the locking opening 18. The fixing element 15 secures the measuring element 11 to the base body 12, or within the shear receptacle 19, by at least partially contacting the fixing section 23 with the measuring element 11 and the shear receptacle element 16. Preferably, the projecting area of ​​the shear receptacle 19 forms a counter-surface for the fixing section 23 to secure the measuring element 11 against movement.

[0042] An advantageous embodiment is characterized in that the at least one fixing element 15 comprises two detent elements 22 which are designed and configured for at least partial engagement with the at least one detent opening 18 of the thrust receiving element 16. Fig. 2 a, Fig. 2b und Fig. 2c and Fig. 3a und Fig. 3b Each fixing element 15 is shown with two locking elements 22. Preferably, in the locking position 20, the inner section 25 of the at least one locking element 22 is angled outwards, and the outer section 26 of the at least one locking element 22 runs substantially parallel to the longitudinal extent of the locking element 22 (see Fig. 2a, Fig. 2c and Fig. 3a ). More preferably, in the detent position 21, the inner section 25 of the at least one detent element 22 runs substantially parallel to the longitudinal extent of the detent element 22, and the outer section 26 of the at least one detent element 22 is substantially angled inwards (see Fig. 2b and Fig. 3b ). As in the Fig. 2 a, Fig. 2b, Fig. 2c as well as Fig. 3a und Fig. 3b As shown, the two locking elements 22 preferably extend leg-shaped from the at least one fixing section 23, wherein the locking elements 22 are designed and configured to be spring-loaded relative to each other. Advantageously, in the locking position 20, the at least one locking element 22 can be moved out of the sliding receptacle 19 in the locking opening 18 by moving the at least one locking element 22 into the unlocking position 21. The process of moving the at least one fixing element 22 out of or into the locking opening 18 is shown in the Fig. 2b shown in detail. For this purpose, the locking elements 22, especially in the area of ​​the free ends 24, are movable from the outer section 26 towards the inner section 25, making it possible to change position from the locking position 20 to the unlocking position 21.

[0043] In a preferred embodiment, the at least one fixing element 15, in particular the at least one locking element 22, comprises at least one locking means 27, wherein the at least one locking means 27 is designed and configured such that, when arranged at least partially in the locking opening 18, it engages behind the opening to lock the at least one locking element 22 in the locking opening 18 in the locking position 20. The locking means 27 can preferably be a section of the locking element 22, in particular a raised area of ​​material, a recess, etc. Fig. 2c The locking means 27 engages a portion of the detent opening 18 or the thrust receiving element 16, thereby locking the fixing element 15 in the thrust receiving element 19 and blocking any automatic movement of the fixing element 15. Preferably, the fixing element 15, in particular the at least one detent element 22, generates an acoustic signal when arranged at least partially in the detent opening 18. The acoustic signal preferably arises from the at least one detent element 22 snapping back into the detent opening 18 from the disengaged position 21 to the detent position 20. More preferably, when arranged in the thrust receiving element 19, the at least one fixing element 15 secures the measuring element 11 in the recess 14 such that the measuring element 11 is secured against displacement along the longitudinal axis L by force and / or positive locking.

[0044] In an advantageous embodiment, the at least one fixing section 23 of the at least one fixing element 15 has at least one fixing recess 28 which is designed and configured to partially enclose a portion of the measuring element 11 projecting from the recess 14 of the base body 12 along the longitudinal axis L. Fig. 2 a, Fig. 2b, Fig. 2c as well as Fig. 3a und Fig. 3b The fixing recess 28 of the fixing element 15 is essentially U-shaped. This is particularly advantageous for measuring elements 11 with an essentially circular diameter or fixing area or section for contact with the fixing section 23. In further advantageous embodiments, the fixing recess 28 can, for example, be rectangular. The fixing recess 28 encloses or covers the measuring element 11 at least in such a way that unwanted removal in the direction of the longitudinal axis L is prevented. Preferably, the measuring element 11 comprises at least one support section – not shown in detail in the figures – which is designed and configured for contact and fixing by the at least one fixing element 15 in the thrust receiving element 16 or in the thrust receiving 19.In conjunction with the at least one fixing element 15 with the at least one spring-loaded detent element 15, the measuring element 11 can be released in the detent position 20 and locked in the push-fit receptacle 19.

[0045] In a further preferred embodiment, the shear receiving element 16 has at least a partial opening 30 on the side 29 facing away from the base body 12, in order to arrange the measuring element 11 in the recess 14 through the opening 30 of the shear receiving element 16 from the side facing away from the base body 12. Preferably, the measuring element 11 is first inserted through the opening 30 from the side 29 facing away from the base body 12 and then secured by the fixing element 15. More preferably, the shear receiving element 16 defines a shear plane that is substantially orthogonal to the longitudinal axis L of the recess 14.

[0046] An advantageous embodiment is characterized in that the recess 14 projects into a fluid-carrying interior 31 of the base body 12, wherein the measuring element 11, in the installed state, can be arranged at least partially in the interior 31 and substantially closes the recess 14. As in the Fig. 1 As shown in the heating cartridge 13, a single base body 12 can comprise several arrangements 10 according to the invention.

[0047] The aforementioned statements relating to the arrangement 10 according to the invention also refer in the same way to the heating cartridge 13 according to the invention for heating a fluid, comprising at least one arrangement 10 according to the invention. The aforementioned statements also refer to a flow heater comprising at least one heating cartridge 13 with at least one arrangement 10 according to the invention.

Claims

1. An arrangement (10) for the releasable fastening of a measuring element (11), in particular of a sensor unit, to a base body (12), comprising: the measuring element (11), the base body (12) having an opening (14) adapted for the at least partial receiving of the measuring element (11) and extending along a longitudinal axis (L), and at least one fastening element (15) configured and adapted for the fixing of the measuring element (11), wherein the base body (12) further comprises at least one slide-receiving element (16) having at least one slide-opening (17) and at least one latching opening (18), wherein the at least one slide-receiving element (16) at least partially projects over the opening (14) to form a slide-receptacle (19), and the fastening element (15) comprising at least one latching member (22) spring-biased between a latching position (20) and a release position (21) and at least one fastening section (23) configured and adapted for the at least partial abutment against the measuring element (11) and / or the slide-receiving element (16), wherein the slide-receptacle (19) is configured and adapted for the at least partial receiving of the fastening element (15) in that the fastening element (15) is transferable via the slide-opening (17) into the slide-receptacle (19) in order to releasably arrange the at least one latching member (22) starting from the release position (21) under transition into the latching position (20) at least partially in the at least one latching opening (18), the fastening element (15) being secured against an automatic release from the slide-receptacle (19) by a self-acting release, and wherein the fastening element (15) having the at least one fastening section (23) in an at least partial arrangement in the slide-receptacle (19) can be brought into abutment with the measuring element (11) and the slide-receiving element (16) such that the measuring element (11) is secured in an essentially movementinhibiting manner.

2. Arrangement (10) according to claim 1, characterized in that the at least one fastening element (15) comprises two latching members (22) configured and adapted for the at least partial engagement with the at least one latching opening (18) of the slide-receiving element (16).

3. Arrangement (10) according to claim 2, characterized in that the two latching members (22) starting from the at least one fastening section (23) extend in a bracket-like manner, wherein the latching members (22) are configured spring-biased relative to each other and are adapted.

4. Arrangement (10) according to one or more of claims 1 to 3, characterized in that in the latching position (20) in the latching opening (18) the at least one latching member (22) can be guided out of the slide-receptacle (19) in that the at least one latching member (22) is movable into the release position (21).

5. Arrangement (10) according to one or more of claims 1 to 4, characterized in that the at least one fastening element (15), in particular the at least one latching member (22), comprises at least one locking means (27), wherein the at least one locking means (27) is configured and adapted in such a way that in an at least partial arrangement in the latching opening (18) it engages behind the latter in order to lock the at least one latching member (22) in the latching position (20) in the latching opening (18).

6. Arrangement (10) according to claim 5, characterized in that the fastening element (15), in particular the at least one latching member (22), in an at least partial arrangement in the latching opening (18) adapts and configures an acoustic signal.

7. Arrangement (10) according to one or more of claims 1 to 6, characterized in that the at least one fastening section (23) of the at least one fastening element (15) has at least one fastening recess (28) which is configured and adapted to partially enclose a region of the measuring element (11) protruding along the longitudinal axis (L) from the opening (14) of the base body (12).

8. Arrangement (10) according to one or more of claims 1 to 7, characterized in that the at least one fastening element (15) in an arrangement in the slide-receptacle (19) secures the measuring element (11) in the opening in such a way that the measuring element (11) is secured in a force-fitting and / or form-fitting manner against a displaceability along the longitudinal axis (L).

9. Arrangement (10) according to one or more of claims 1 to 8, characterized in that the slide-receiving element (16) on the side (29) facing away from the base body (12) has at least partially a through-opening (30) in order to arrange the measuring element (11) from the side facing away from the base body (12) through the through-opening of the slide-receiving element (16) into the opening (14).

10. Arrangement (10) according to one or more of claims 1 to 9, characterized in that the slide-receptacle (19) spans a slide-plane which runs essentially orthogonally to the longitudinal axis (L) of the opening (14).

11. Arrangement (10) according to one or more of claims 1 to 10, characterized in that the opening (14) projects into a fluid-conducting interior (31) of the base body (12), wherein the measuring element (11) in the inserted state is arrangeable at least partially in the interior (31) and essentially closes the opening (14).

12. Heating cartridge (13) for the heating of a fluid, comprising at least one arrangement (10) according to one or more of claims 1 to 11.

13. Instantaneous water heater comprising at least one heating cartridge (13) according to claim 12.