Instantaneous water heater

Abstract

Instantaneous water heater (100) with a heating element (300), a cold water pipe (620) for connection to a cold water supply and a hot water pipe (630) for connection to a hot water supply and with a partition (E) that separates an assembly room (610) from an equipment room (290), wherein at least the cold water pipe (620) is rotatably mounted in the radiator (300) so that the cold water pipe (620) can pivot between a first position and a second position, characterized by that the cold water pipe (620) is located in the first position on the mounting side towards the separation plane (E) in a connection space (20) for connection to the cold water line and that the cold water pipe (620) in the second position is in an unconnected state on the equipment room side to the separation plane (E) in a swivel space (30).

Description

[0001] The invention relates to an instantaneous water heater with a radiator, a cold water pipe for connection to a cold water supply and a hot water pipe for connection to a hot water supply and with a separating plane that separates an installation space from an equipment space, wherein at least the cold water pipe is rotatably mounted in the radiator so that the cold water pipe can pivot between a first position and a second position.

[0002] Instantaneous water heaters typically consist of a heating element with a cold water pipe and a hot water pipe. Cold water is fed to the heating element via the cold water pipe, heated within the element, and then supplied to a tap via the hot water pipe. To connect the instantaneous water heater to a power supply, a cable is run from the outside into the interior of the heater's housing and connected there to the electronic components.

[0003] German patent DE 38 16 817 A1 discloses an electric instantaneous water heater with a cold water inlet pipe and a hot water outlet pipe for connection to two mounting points. To facilitate optional under-counter or over-counter installation, the two pipe sections are pivotable so that the end of each pipe section can be swivelled to either of the two mounting points.

[0004] From DE 20 2004 012 263 U1 emerges a flow heater with a heating element, a cold water inlet and other components.

[0005] Based on the prior art, the invention is based on the objective of providing an instantaneous water heater that can be easily and safely mounted at a mounting point.

[0006] The problem is solved by the characterizing features of claim 1.

[0007] Afterwards, the cold water pipe lies in the first position on the mounting side towards the separation plane in a connection room for connection to the cold water line and in the second position in an unconnected state on the equipment room side towards the separation plane in a swivel room.

[0008] The invention relates to the concept of mounting at least the cold water pipe pivotably within the radiator so that it can be unscrewed from the connection compartment for the installation of the instantaneous water heater, particularly for connecting the instantaneous water heater to an electrical supply. Often, the electrical supply is routed into the instantaneous water heater from the rear through a back panel, which results in the cold water pipe being positioned in front of the electrical supply, thus complicating installation. According to the invention, the cold water pipe can therefore be unscrewed from the connection compartment, thereby simplifying installation.

[0009] During installation, the cold water pipe lies in the swivel chamber and cannot be connected to the cold water supply in this position. To connect the cold water pipe to the cold water supply, the cold water pipe is rotated back into the connection chamber.

[0010] In an advantageous embodiment of the invention, the cold water pipe has a flared end for fastening in the radiator by means of a U-shaped clamp. This improves the rotatability of the pipe.

[0011] The connection compartment is located on the mounting side facing the partition, and the swivel compartment is located on the appliance side facing the partition. The partition separates the mounting compartment from the appliance compartment. Within the mounting compartment, the instantaneous water heater is installed, primarily to a cold water line and / or a hot water line and / or an electrical line. The appliance compartment contains other components of the instantaneous water heater, particularly electronic components that are not exposed to direct external water contact, such as the heating element or a control unit.

[0012] According to one embodiment, the separating plane is merely virtual and marks the transition between the assembly area and the equipment room.

[0013] In an advantageous embodiment, the separating plane is formed by a partition wall that physically separates the equipment compartment and the assembly compartment, in particular sealing the equipment compartment against the assembly compartment to prevent water from entering the equipment compartment.

[0014] According to the invention, the pivoting area, viewed from the assembly area, lies beyond the separating plane.

[0015] Thus, the connection space is located in the area of ​​the assembly space and the swivel space is located in the area of ​​the equipment room.

[0016] Therefore, the cold water pipe is preferably inserted into the radiator from the side or from above, in order to be able to swivel the cold water pipe well into the swivel area.

[0017] In a further embodiment of the invention, the instantaneous water heater has a cable grommet for routing an electrical cable, the grommet being positioned in the connection compartment. The electrical cable is guided through the cable grommet, which preferably has an opening to the appliance compartment, into the appliance compartment to be connected there to other electronic components of the instantaneous water heater. The cable grommet seals the electrical cable against moisture. By pivoting the cold water pipe into the pivoting area, the cable grommet is preferably exposed so that the electrical cable can be threaded through the grommet without obstruction, which facilitates installation.

[0018] In another embodiment, the cable grommet is removable.

[0019] According to a preferred embodiment of the invention, the connection space has a threading zone for threading the electrical conductor into the cable gland and a fastening zone for fastening connecting strands of the electrical conductor to a terminal block.

[0020] Preferably, the cold water pipe is routed between the cable gland and the terminal block. The resulting geometry of the cold water pipe ensures that the electrical conductor does not come into direct contact with it, thus guaranteeing a secure installation.

[0021] A fastening method preferably comprises at least two of the following steps, the order of which is not specified by the following list: - Attaching the back panel of the instantaneous water heater to a wall - Swiveling the cold water pipe into the swivel space into the second position - Removing the cable grommet - Threading the electrical wire into the cable gland - Attaching the connecting wires of the electrical cable to a terminal block - Attaching the cable grommet - Swiveling the cold water pipe into the connection space into the first position - Attaching the cold water pipe to a cold water line - Attaching the hot water pipe to a hot water line

[0022] The drawing shows Fig. 1a an instantaneous water heater with a cold water pipe in a first position Fig. 1b the instantaneous water heater according to Fig. 1 with a cold water pipe in a second position Fig. 1c the instantaneous water heater according to Fig. 1 with an attached electrical cable

[0023] Fig. Figure 1 shows an instantaneous water heater 100 in a first position. The instantaneous water heater 100 has a back panel 220, a heating element 300, a cold water pipe 620, and a hot water pipe 630. The cold water pipe 620 has a cold water connection 621 for connection to a cold water supply (not shown). The hot water pipe 630 has a hot water connection 631 for connection to a hot water supply (not shown). A cable gland 291 is also provided for receiving an electrical cable. The electrical cable can be connected to component leads 294 of electronic components of the instantaneous water heater 100 via a terminal block 710. A partition E separates a device compartment 290 from an assembly compartment 610. In the assembled state, the assembly compartment 610 contains, among other things, at least a part of the cold water pipe 620 and the hot water pipe 630, the cable gland 291, the cold water connection 621, and the hot water connection 631.For example, the radiator 300 and the terminal block 710 are located in equipment compartment 290. The cold water pipe 620 is rotatably mounted in the radiator, allowing it to pivot between a first and a second position. In the first position, the cold water pipe 620 lies in a connection compartment 20, which is located within the area of ​​the mounting compartment 610. In the second position, the cold water pipe 620 lies in a pivot compartment 30, which is located within the area of ​​equipment compartment 290. The swivel space 30 can be located, in particular, above (30') the terminal block 710 or to the side (30") of the terminal block. Due to the rotatable mounting of the cold water pipe 620 in the radiator 300, the cold water pipe 620 can be rotated out of the connection space 20, so that a cable can be threaded into the cable gland 291.The connection space 20 consists of a threading zone 21 for threading the cable into the cable gland 291 and a fastening zone 22 for fastening connecting strands of the cable to the terminal block 710.

[0024] In Fig. Figure 1a shows the instantaneous water heater 100 in its initial state, i.e., the cold water pipe 620 is in the position in the connection compartment 20. To facilitate rotation of the cold water pipe 620, it is inserted laterally into the radiator 300 and guided between the terminal block 710 and the cable gland 291. In this area between the cable gland 291 and the terminal block 710, the cold water pipe 620 can be rotated about its own axis.

[0025] In Fig. 1b is the instantaneous water heater 100 from Fig. Figure 1 shows the cold water pipe 620 in the second position. The cold water pipe 620 is unscrewed from the connection space 20 and is now located in swivel space 30'. This exposes the cable gland 291, allowing the cable 292 to be threaded into the cable gland 291 without obstruction. A technician's hand 24 threads the cable 292 through the cable gland 291 in the threading zone 21 and secures the cable's connecting wires 293 to the terminal block in the fastening zone 22 using a screwdriver 23.

[0026] In Fig. Figure 1c shows an instantaneous water heater 100 with a mounted electrical line 292, wherein the line 292 is guided through the cable gland 291 and the connecting wires 293 of the line 292 are attached to the terminal block 710.

[0027] Thus, it shows Fig. 1a the assembly state before connecting the instantaneous water heater 100 to the line 292. Fig. Figure 1b shows the state of the instantaneous water heater 100 during the installation of the line 292 with the cold water pipe 620 unscrewed. Fig. Figure 1c shows the 100 instantaneous water heater with the connected cable. In Fig. 1c the cold water pipe 620 is screwed back into the connection room 20 and would in a next step be connected to a cold water pipe not shown.

Claims

[1] Instantaneous water heater (100) with a heating element (300), a cold water pipe (620) for connection to a cold water supply and a hot water pipe (630) for connection to a hot water supply and with a partition (E) that separates an assembly room (610) from an equipment room (290), wherein at least the cold water pipe (620) is rotatably mounted in the radiator (300) so that the cold water pipe (620) can pivot between a first position and a second position, characterized by , that the cold water pipe (620) is located in the first position on the mounting side towards the separation plane (E) in a connection space (20) for connection to the cold water line and that the cold water pipe (620) in the second position is in an unconnected state on the equipment room side to the separation plane (E) in a swivel space (30). [2] Instantaneous water heater (100) according to claim 1, characterized bythat the cold water pipe (620) is inserted into the radiator (300) from the side or from above. [3] Instantaneous water heater (100) according to claim 1 or 2, characterized by , that the separating plane (E) is formed by a partition wall. [4] Instantaneous water heater (100) according to one or more of the preceding claims 1 to 3, characterized by , that the instantaneous water heater (100) has a cable gland (291) for the passage of an electrical cable (292), wherein the cable gland (291) is positioned in the connection space (20). [5] Instantaneous water heater (100) according to claim 4, characterized by , that the cold water pipe (620) is routed between the cable gland (291) and a terminal block (710). [6] Instantaneous water heater (100) according to claim 4 or 5, characterized by , that the cable grommet (291) is removable. [7] Instantaneous water heater (100) according to one or more of the preceding claims 1 to 6, characterized by, that the connection space (20) has a threading zone (21) for threading the electrical conductor (292) into the cable gland (291) and a fastening zone (22) for fastening connecting strands (293) of the electrical conductor (292) to the socket terminal block (710).

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