EP3240972A1 - Thermostat device and method for detecting mis-wiring in a thermostat device - Google Patents
Thermostat device and method for detecting mis-wiring in a thermostat deviceInfo
- Publication number
- EP3240972A1 EP3240972A1 EP16701088.3A EP16701088A EP3240972A1 EP 3240972 A1 EP3240972 A1 EP 3240972A1 EP 16701088 A EP16701088 A EP 16701088A EP 3240972 A1 EP3240972 A1 EP 3240972A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- miswiring
- heating system
- control device
- electrical connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 9
- 230000006378 damage Effects 0.000 claims description 6
- 230000006854 communication Effects 0.000 description 9
- 238000004891 communication Methods 0.000 description 9
- 230000008054 signal transmission Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000003685 thermal hair damage Effects 0.000 description 2
- 230000007175 bidirectional communication Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0257—Thermostatic valves
Definitions
- thermostat device and method for detecting miswiring in a thermostat device A thermostat device and method for detecting miswiring in a thermostat device
- the present disclosure relates to a thermostat device according to the preamble of claim 1 and a method for detecting a miswiring in a
- Thermostatic device is thermostatic device.
- thermostatic devices Under a thermostatic devices can be understood devices that send control commands to a heating system, in particular depending on an ambient temperature of the thermostatic device or a temperature in a room to be heated by the heating system.
- thermostatic devices which have two electrical connections. These are connected to the heating system to be controlled and allow a digital
- thermostat devices with three electrical connections, which are to be connected to the heating system to be controlled. About two of the electrical connections, a power supply of the thermostatic device can be effected by the heating system. The rest of the electrical connection allows the output of a control command from the thermostatic device to the heating system. This control command is output in the form of an analog voltage.
- a generic thermostat device for controlling a heating system should be suitable for both the aforementioned digital communication via two terminals as well as for said unidirectional communication by an analog voltage.
- the thermostatic device is suitable for retrofitting existing heating systems, where it can replace an existing thermostat.
- a generic thermostat device comprises:
- a control device which is adapted to generate a heater control command and this optionally - Output in the form of an analog voltage on the third electrical connection, or
- Voltage measuring means and current measuring means arranged to read digital signals originating from the heating system are arranged so that they have a voltage and a current between the first and the second Connection are measurable
- the voltage measuring means are also adapted to measure a voltage at the third electrical connection.
- thermostatic device has (for at least) three electrical connections for the greatest possible compatibility, even if only two wires may need to be connected depending on the heating system to be controlled.
- Thermostat device and a method are considered, which counteract damage to the thermostat device due to miswiring.
- thermostatic device having the features of claim 1 and by the method having the features of claim 10.
- the control device for detecting a faulty connection of wires of a heating system with the electrical terminals of the thermostatic device, the control device is arranged to perform a false wiring examination mode.
- the voltage measuring means measure a voltage at the third electrical connection
- the controller compares the measured voltage with at least one reference value and
- the controller generates a miswiring detection signal depending on a result of the comparison.
- Thermostatic device is a thermoplastic material
- a control device which is adapted to generate a heater control command and this optionally
- Voltage measuring means and current measuring means arranged to read digital signals originating from the heating system in such a way that a voltage and a current between the first and the second connection can be measured with them
- the voltage measuring means are also adapted to measure a voltage at the third electrical connection.
- the method comprises performing a miswiring examination mode. In this: If the voltage measuring means measure a voltage at the third electrical connection, the control device compares the measured voltage with at least one reference value and
- a significant advantage of the invention is that miswiring is detected and displayed without the need for user interaction.
- a voltage measurement alone at the third electrical connection can be sufficient, that is to say at the connection which is used in normal operation for the output of a heating control command (or in short: control command) in the form of an analog voltage.
- this may be sufficient to use only components that are used anyway in a normal operation of the thermostat device.
- the advantages of measuring and evaluating the voltage at the third electrical connection are particularly significant if electrical reverse polarity protection is present between the first and the second electrical connection.
- the polarity reversal protection can comprise two lines at which it outputs certain (desired) polarities independently of a swapping of two connected wires. So can as reverse polarity protection a
- Rectifier circuit may be provided between the first and the second electrical connection.
- the rectifier circuit may comprise, for example, a bridge rectifier, which may consist of four diodes.
- reverse polarity protection is thus achieved that it makes no difference whether a wire is connected to the first or second connection.
- a voltage measurement and evaluation behind the reverse polarity protection would thus make no or no clear statement as to which of the two connected wires is connected incorrectly.
- the voltage measurement according to the invention at the third terminal allows the unambiguous statement as to whether the wire is correctly or incorrectly connected to this connection.
- the voltage measuring means for voltage measurement at the third connection can also be used in a normal mode in which a signal is output via the third connection to a connected heating system. In this case, a correct signal output is checked by the voltage measurement and optionally corrected within the scope of a control loop. So it can happen that a connected heating system the height of the analog Output voltage at the third terminal undesirable influences. To compensate for this influence, the voltage measuring means and the control device form a control loop: A difference between a measured voltage level at the third terminal and a desired voltage level is determined. According to the determined difference gives the
- Control means an instruction for increasing or decreasing the voltage at the third terminal.
- the voltage at the third connection can not be changed or not as desired. Whether this is present is determined by comparing the measured voltage with the at least one reference value. In principle, this can be understood to mean any calculation of the measured voltage with one or more predetermined values. For example, it can be compared whether the measured voltage differs by at least a predefinable threshold value of 0 volt. More complex calculations are also possible.
- the electrical connections can in principle be any electrical means, the one
- Allow connection of wires may be configured as terminals that are accessible from an environment of a housing of the thermostatic device.
- wires any electrical cables or cables can be construed.
- the wire to be connected to the third connection will also be referred to as a signal transmission wire.
- the other two wires are also referred to as supply wires, indicating their function of power supply.
- a significant advantage of the miswiring inspection mode is that incorrect cabling can be detected immediately upon startup of the thermostat device. So can the
- Control device to be set up immediately after a device start the
- control device is supplied with electrical energy and is then able to issue an instruction to issue a control command via the electrical connections. This may in particular be the case by connecting wires to two or three of the electrical connections, or by a subsequent operation of an optionally present on / off switch.
- a normal operation is not performed after a device start, in which a control command can be output via the electrical connections.
- a normal operation may also be referred to as a heater control mode.
- the control device is set up to perform the heating system control mode only when no miswiring detection signal is generated in the miswiring examination mode.
- the thermostatic device may comprise an operational amplifier, with which the voltage at the third terminal is adjustable. This amplifier threatens to be thermally damaged by a long-lasting miswiring.
- the controller may be configured to disable the thermostatic device or components of the thermostatic device upon generation of a miswiring detection signal to avoid damage due to miswiring.
- the components may include, for example, radio and / or the aforementioned operational amplifier.
- a shutdown can be understood to mean that a flow of current through these components is prevented or reduced.
- control device may be set up during the miswiring examination mode:
- test signal is generally a non-zero voltage and is compared to the at least one reference value in the mis-wiring examination mode.
- the controller may also be configured to issue an instruction to a user upon generation of a miswiring detection signal, after which a wire connected to the third terminal is to be disconnected and connected to one of the other two terminals. Therefore, if only two wires are used, this is a clear instruction to make a correct wiring: The wire should be disconnected from the third connector and connected to the still free connector. After all, with three wires used, this instruction leaves only two cabling options that a user can then test, namely to swap the wire from the third connector with the wire from the first connector or the wire from the second connector.
- the output of an instruction to the user can basically be done in any way.
- the miswiring inspection mode means are used that are also present and used independently of the miswiring investigation mode.
- an acoustic signal can be output, wherein the corresponding means can be used in a normal operation, for example, to confirm the receipt of a signal that a user inputs via a smartphone and which are routed via an Internet connection to a server and finally received by the radio becomes.
- an instruction to the user may also be visually displayed, such as via one or more LEDs or a screen.
- control device is set up to send the instruction to the user to the user via an internet connection, which is established via radio of the thermostat device.
- the instruction can be communicated to the user in a detailed and easily understandable manner.
- provision can be made for the control device to inform the user via the radio and the Internet connection that correct cabling has now been established. This can be done whenever no miswiring detection signal is generated after a miswiring detection signal is generated in a subsequent performing of the miswiring test mode. This may require logging miswiring detection signals in a nonvolatile memory.
- the memory may be present within the thermostat device or in a server with which the radio communicates via an internet connection.
- thermostatic device has no battery and a power supply takes place solely via the first and second electrical connection.
- a power supply via the first and second electrical connection it may depend on the type of miswiring, whether the control unit is still supplied with electrical energy and can run the Fehlvertreuungsuntersuchungsmodus or not.
- the control unit is energized when a signal transmission wire to be connected to the third terminal is interchanged with that supply wire which is at ground level or at least closer to ground level than the rest of the supply wire.
- the control unit is not supplied with power when connected to the third terminal of that supply wire whose electrical potential for Power supply is further away from ground than the electrical potential of the other power supply.
- a miswiring that does not provide power and thus prevents execution of the miswiring inspection mode can be detected by a user that the thermostat device is not starting. However, it may be desired that even with such miswirings, a miswiring detection signal can be generated. This is made possible when a battery is provided for power supply.
- the thermostatic device may include control means for disabling power supply via the battery when power is supplied through the electrical connections and enabling operation of the control device.
- the control means may be part of or different from the control device.
- the control device is adapted to perform the Fehlverlessnessungsuntersuchungsmodus by means of the power supply of the battery.
- the battery in turn, can be used for other functions so that it is not necessary for the miswiring study mode alone.
- the battery can be used temporarily whenever an instantaneous energy requirement of components of the thermostatic device is higher than the energy that can be used via the electrical connections. This may be the case, for example, when the radio or LCD of the thermostat device is temporarily active.
- the thermostatic device may also have other connections for connection to the heating system, without affecting the teaching described here.
- the described optional features of the thermostatic device are also to be considered as corresponding features of method variants of the invention, wherein method steps result from the intended use of the device features, and vice versa.
- Fig. 1 shows an embodiment of a thermostat device according to the invention and a heating system to be connected thereto.
- thermostat device 1 In Fig. 1, an embodiment of a thermostat device 1 according to the invention and a heating system 40 to be connected thereto are shown schematically.
- the thermostat device 1 can generate control commands with which an operation of the heating system 40 is set, for example a boiler temperature.
- the thermostat device 1 is usually arranged in a different space than the heating system 40.
- the thermostat device 1 may be located in a living room and the heating system 40 in a basement or a neighboring building.
- the thermostat device 1 In order to send control commands to the heating system, the thermostat device 1 comprises a first electrical connection 11, a second electrical connection 12 and a third electrical connection 13. A plurality of wires 41, 42, 43 leading to the heating installation 40 are to be connected to these.
- a power supply of the thermostat device 1 can be accomplished.
- the terminals 11 and 12 are suitably connected within the thermostat device 1 with other components.
- the thermostat device 1 should be compatible with a variety of different heating systems 40.
- the thermostat device 1 is able to output a control command in various ways.
- an analog signal output is possible.
- a voltage level at the terminal 13 is adjusted by means of voltage output means 14.
- the amount of this tension can then be interpreted by the heating system 40 as a control command. If the heating system 40 is designed for such an analog control command reception, then the other two wires leading to the terminals 11 and 12 are the sole power supply. Communication from the heating system 40 to the thermostat device 1 is not possible in the rule.
- the thermostat device 1 can use the terminals 11 and 12 as a digital BUS.
- a bidirectional communication is possible, that is, incoming digital signals can be read by the thermostat device 1 and control commands can be output.
- voltage measuring means 4 and current measuring means 5 are provided for reading digital signals. These measure a voltage and a current between the terminals 11 and 12, which may also be understood as a voltage derived therefrom and a current derived therefrom.
- the voltage and current measurements can be made downstream of components connected to the terminals 11 and 12.
- a rectifier circuit 15 is connected to the terminals 11 and 12.
- the rectifier circuit 15 can be designed in particular as a bridge rectifier.
- the voltage applied to the terminals 11 and 12 is usually a DC voltage, so that a reverse polarity protection is achieved by the rectifier circuit 15. This allows a user to swap the two wires for the terminals 11 and 12 without causing errors.
- the derived voltage and the derived current downstream of the rectifier circuit 15 and possibly other subsequent components should be understood in the context of this description as synonymous with the voltage and the current at the terminals 11 and 12.
- connection 13 In the case of digital communication via the terminals 11 and 12 and a power supply.
- the connection 13 does not function and is used only for an analogue signal output.
- a user must correctly connect the two or three existing wires 41-43 to terminals 11-13 for heating control to be possible. Miswiring may also result in damage to components of the thermostat device 1.
- one or more operational amplifiers of the thermostat device 1 may gradually heat up due to miswiring and thereby be damaged.
- a controller 20 of the thermostat device 1 is configured to perform a miswiring inspection mode. It can be provided that this mode is performed directly after each turning on the thermostat device 1, or as soon as a power supply of the thermostat device 1 is produced.
- the rectifier circuit 15 avoids exchanging the supply wires 41 and 42 to be connected to the terminals 11 and 12. At terminal 13, however, the consequences are dependent on which of the wires 41-43 is connected. If a power supply is provided, the voltage output means 14 may adjust a voltage at the terminal 13 as desired when the correct wire 43 is connected thereto. The remaining two wires 41, 42 may be connected to the terminals 11 and 12 as desired to achieve a power supply.
- the miswiring inspection mode can be performed only when power is supplied to the controller 20.
- the heater 40 affects or sets the voltage applied across the supply wire 41 or 42 to the terminal 13, the voltage output means 14 can not set a voltage at the terminal 13 as desired.
- the measured voltage at terminal 13 is offset with reference data. For example, it can be compared whether a reference value is exceeded or not reached. If the wiring is faulty, the measured voltage may be in the range of 0 volts or at most +/- 1 or 2 volts other than that. In particular, depending on the design, the voltage can be slightly below 0 V, whereby a microcontroller of the control device 20 alone can measure positive voltages depending on the design and thus indicates 0 V. On the other hand, with proper wiring, significantly higher voltage values can be generated. For this purpose, provision may also be made for the voltage output means 14 to be actuated at the connection 13 in the fault cabling examination mode in order to generate a test signal. Thus, the output of a Fehlvertreuungs detection signal can also be made whenever a voltage at the terminal 13 is not or at most a predetermined size by the voltage output means 14 changeable.
- a miswiring detection signal is generated. This can be output in particular via radio 18 of the thermostat device 1.
- the radio 18 may establish an Internet connection itself or via a communication to a network-enabled device. Over the Internet connection, a user can be informed about the miswiring. In particular, a corresponding information can be sent to a smartphone of the user.
- a false-wiring detection signal can also be indicated to a user in another form, for example via a visual display, in particular in the form of light-emitting diodes or a screen on the thermostat device 1.
- miswiring may also be present in a manner that does not provide power through the terminals 11-13. If there is no battery, a user can recognize such a miswiring by the fact that the thermostat device 1 can not start. Alternatively, the thermostat device 1 but also have a battery 17. This can be used if no or insufficient energy supply is possible via the connections 11-13. Thanks to the battery 17, even in such miswiring, the miswiring inspection mode can be performed.
- the thermostat device 1 turns off or at least deactivates components as soon as a miswiring detection signal has been generated and sent to a user. For example, this may be done immediately after sending a miswiring detection signal via the radio 18. Also, the voltage output means 14 or other components with which a current is adjustable, can be operated so that they lead or cause the lowest possible currents in the case of miswiring.
- the Fehlverlessnessungsuntersuchungsmodus is performed directly after a start of the thermostatic device 1 and normal operation in which control commands are sent, is changed only when in Albertver.ungsuntersuchungsmodus no miswiring detection signal has been generated .
- An important advantage of the Fehlverlessnessungsuntersuchungsmodus can also be seen in the fact that no components are required, which are not used for other functions of the thermostat device 1.
- the voltage measuring means 4 are also used at the terminal 13 to control a correct level of voltage set by the voltage output means 14 and correct if necessary. The difference to this normal function is in the miswiring test mode compared to the reference value and the consequence of informing a user about the miswiring.
- the radio means 18 are used not only in the miswiring examination mode but also, for example, for a user to send instructions to the thermostat device 1.
- the control device 20 of the thermostatic device 1 can be designed to generate corresponding control commands to a heating system depending on received instructions or received temperature measured values.
- the thermostat device 1 itself may also have temperature measuring means (not shown).
- control device 20 which serve to output a control command in the form of a modulated digital voltage or a modulated digital current.
- This voltage or this current is impressed on the circuit which is formed via the first and second terminals, which is referred to here as signal output via the first and / or second terminal.
- a digital modulation can be understood to mean that the current or voltage is set to a sequence of two different levels. This sequence encodes the control command. On the other hand, at an analog voltage, its exact height determines the content of the control command without requiring a sequence of different levels.
- heating systems with two wires 41, 42 or heating systems with three wires 41, 42, 43 each have six connection possibilities:
- wire 41 Two faulty connections that do not provide signal output but still allow for power are given when a particular one of the supply wires (referred to herein as wire 41) is connected to terminal 13.
- wire 42 Two faulty connections that allow no signal output and no power supply are given when the other of the supply wires (referred to herein as wire 42) is connected to terminal 13.
- the two groups of faulty connections can be detected by the miswiring inspection mode. In the presence of a battery, it is also possible to differentiate between these groups depending on whether a power supply is possible via the connections 11-13. However, this information is not required for the output of a miswiring detection signal.
- the Fehlvertreuungsuntersuchungsmodus can be particularly easily implemented, if this does not include a different measurement than the voltage measurement at the third terminal 13. By just measuring this voltage, however, miswiring can be reliably detected. Therefore, the disclosed thermostat device enables damage caused by miswiring to be avoided without the need for expensive electronic components, especially fuses.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015000079.9A DE102015000079A1 (en) | 2015-01-04 | 2015-01-04 | A thermostat device and method for detecting miswiring in a thermostat device |
PCT/EP2016/000004 WO2016107931A1 (en) | 2015-01-04 | 2016-01-03 | Thermostat device and method for detecting mis-wiring in a thermostat device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3240972A1 true EP3240972A1 (en) | 2017-11-08 |
EP3240972B1 EP3240972B1 (en) | 2019-02-27 |
Family
ID=55182291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16701088.3A Active EP3240972B1 (en) | 2015-01-04 | 2016-01-03 | Thermostat device and method for detecting mis-wiring in a thermostat device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3240972B1 (en) |
DE (1) | DE102015000079A1 (en) |
WO (1) | WO2016107931A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2552479B (en) * | 2016-07-24 | 2021-04-07 | tado GmbH | Thermostat, and method for operating a heating boiler controller and a thermostat |
CN113447885B (en) * | 2021-08-30 | 2022-01-11 | 广东电网有限责任公司湛江供电局 | Electric energy meter wrong wiring rapid detection circuit and device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7821218B2 (en) * | 2008-04-22 | 2010-10-26 | Emerson Electric Co. | Universal apparatus and method for configurably controlling a heating or cooling system |
DE102012021509A1 (en) | 2012-11-02 | 2014-05-08 | tado GmbH | Device and method for controlling a heating and / or cooling system |
-
2015
- 2015-01-04 DE DE102015000079.9A patent/DE102015000079A1/en not_active Withdrawn
-
2016
- 2016-01-03 WO PCT/EP2016/000004 patent/WO2016107931A1/en active Application Filing
- 2016-01-03 EP EP16701088.3A patent/EP3240972B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2016107931A1 (en) | 2016-07-07 |
EP3240972B1 (en) | 2019-02-27 |
DE102015000079A1 (en) | 2016-07-07 |
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