Methods, systems and devices for liquid handling

Abstract

The present invention relates to an apparatus, system and method for liquid treatment. The liquid treatment apparatus (10) comprises a processing unit (32), a memory unit (34) and an insert module interface (36) for connecting to an insert module (40), wherein the memory unit (34) and the insert module (40) interface (36) are communicatively connected to the processing unit (32), wherein the method comprises: - determining parameters characterizing a liquid treatment process and sending the parameters to the processing unit (32); - receiving the parameters by the processing unit (32); - identifying the insert module (40) connected to the insert module interface (36) by the processing unit (32); - in response to identifying the insert module (40), loading instructions from the memory unit to the processing unit (32); and - sending the parameters to the insert module (40) via the insert module interface (36) by the processing unit (32) according to the instructions.

Description

Technical Field

[0001] The invention relates to a method of operating a liquid treatment device. The invention also relates to a system for liquid treatment, a liquid treatment device and an insert module. Background Art

[0002] There are liquid treatment devices for many applications, in particular for performing liquid treatment processes. Liquid treatment devices may be used, for example, for purification, sterilization, iron removal, manganese removal, calcium removal, demineralization, dosing a liquid with any substance, adjusting pH, adjusting conductivity or simply for mixing two or more liquids together. The efficiency of the treatment process can be improved by regular monitoring and readjustment of the liquid treatment device.

[0003] WO 2014 / 033145 discloses a liquid handling device having an interface and a method for operating the system. The interface is used to receive user input and / or provide output to the user and to exchange data with an external device. The interface is an integral part of the liquid handling device and cannot be removed without destroying the liquid handling device.

[0004] The liquid handling device may be configured according to the user's wishes. A user with a liquid handling system that does not have any interface at all may want to upgrade the system so that his liquid handling device gains the ability to communicate with other systems. Another user with a liquid handling device that includes an interface for communication may consider downgrading the system because the operating costs are too high and the advantages of the interface are not used in any way. Summary of the invention

[0005] Therefore, the problem to be solved by the present invention is to provide a method, a system, a liquid treatment device and a plug-in module for water treatment which are flexible and can be reconfigured according to the user's requirements without the need to purchase a completely new liquid treatment device.

[0006] This problem is solved by the subject matter of each independent claim.

[0007] The following description refers to a "system" and a "liquid handling device". Within the framework of the present invention, a "liquid handling device" refers to a system for handling liquids, excluding any additional modules (such as plug-in modules) or external components (such as terminals, personal computers, servers, etc.). When it is referred to as a "liquid handling device", it is always indicated as such. On the other hand, a "system" means a plurality of components that interact with each other and work together to perform a specific task, which may include additional modules (such as plug-in modules) and / or external components (such as terminals, personal computers, servers, etc.).

[0008] In a first aspect, the present invention relates to a method for operating a liquid treatment device. The liquid treatment device comprises a processing unit, a memory unit and an insert module interface for connecting to an insert module. The memory unit and the insert module interface are communicatively connected to the processing unit. The method comprises:

[0009] Determining parameters characterizing the liquid treatment process and sending said parameters to a processing unit;

[0010] Receiving the parameters by a processing unit;

[0011] identifying, by the processing unit, a plug-in module coupled to the plug-in module interface;

[0012] · loading instructions from the memory unit to the processing unit in response to identifying the intervening module; and

[0013] According to the instructions, the processing unit sends the parameters to the plug-in module via the plug-in module interface.

[0014] According to another aspect, the present invention relates to a system for liquid treatment, the system comprising a liquid treatment device and an insertion module, wherein the liquid treatment device comprises a liquid treatment container containing at least one liquid treatment medium and a device head adapted to be coupled to the liquid treatment container, and wherein the insertion module is configured to be inserted into the device head of the liquid treatment device, the device head comprising:

[0015] Processing unit;

[0016] a memory unit communicatively connected to the processing unit;

[0017] Devices for determining parameters characterizing a liquid handling process;

[0018] a plug-in module interface for communicatively coupling the plug-in module to the processing unit;

[0019] Devices used to identify the inserted module;

[0020] means for loading instructions from the memory unit in response to identifying the inserted module;

[0021] means for sending parameters to the plug-in module via the plug-in module interface (36) according to said instructions;

[0022] means for mechanically coupling the liquid handling device to the insertion module;

[0023] The insertion module comprises:

[0024] a liquid handling device interface for communicatively coupling the plug-in module to the liquid handling device;

[0025] means for identifying an inserted module to a liquid handling device;

[0026] means for receiving parameters characterizing a liquid handling process from a liquid handling device;

[0027] means for performing functional processing on said parameters;

[0028] - Means for mechanically coupling the plug-in module to the liquid handling device.

[0029] In yet another aspect, the present invention relates to a liquid treatment device. The system includes a liquid treatment container containing at least one liquid treatment medium, a processing unit, a memory unit communicatively connected to the processing unit, and a device for determining parameters characterizing a liquid treatment process. The liquid treatment device also includes: an insertion module interface for connecting to an insertion module of the processing unit, a device for identifying the insertion module, a device for loading instructions from the memory unit in response to identifying the insertion module, and a device for sending parameters to the insertion module via the insertion module interface according to the instructions.

[0030] The liquid treatment medium may be, for example, a filtration medium (such as activated coal) or a reaction medium (such as an ion exchange medium).

[0031] The processing unit may be, for example, a single-core or multi-core microprocessor, a field programmable gate array, a microcontroller or any other device capable of executing program code.The memory unit may preferably be a non-volatile memory unit.

[0032] The means for determining parameters, the means for identifying the plug-in module, the means for loading instructions from the memory unit and the means for sending parameters may be in the form of an integrated circuit within the processing unit or software stored on the memory unit and executed by the processing unit, for example.

[0033] By having a plug-in module interface, the liquid treatment device is able to receive a plug-in module, which is coupled to the plug-in module interface via a corresponding liquid treatment device interface. Thus, the liquid treatment device can be enhanced or modified by any plug-in module or its functionality, respectively.

[0034] Preferably, the liquid handling device also includes a device head suitable for connecting to the liquid handling container (12), the device head including a processing unit (32); a memory unit (34) communicatively connected to the processing unit (32); a device for determining parameters characterizing a liquid handling process; an insertion module interface (36) for communicatively connecting the insertion module (40) to the processing unit (32); a device for identifying the insertion module (40); a device for loading instructions from the memory unit (34) in response to identifying the insertion module (40); a device for sending the parameters to the insertion module (40) via the insertion module interface (36) according to the instructions; and a device for mechanically connecting the liquid handling device (10) to the insertion module (40).

[0035] Therefore, the liquid treatment device preferably comprises two parts: a liquid treatment container and a device head, which is also called a filter head depending on the application. The liquid treatment container contains the liquid treatment medium. The device head comprises the above-mentioned functional or electronic components of the liquid treatment device, which includes one or more sensors as part of the means for determining the parameters.

[0036] The liquid treatment container is preferably replaceably connected to the device head. If the liquid treatment medium is exhausted, i.e. liquid is no longer treated, the liquid treatment container can be removed from the device head and a new liquid treatment container with replenished, reactivated or refilled liquid treatment medium can be connected to the device head. Thus, the device head is a continuously usable component, while the liquid treatment container can be replaced if necessary.

[0037] The liquid treatment device may further comprise, for example, an inlet, an outlet, one or more valves, a valve motor for controlling the valves to adjust the amount of treated liquid or the ratio of the treated liquid portion to the untreated liquid portion.

[0038] Preferably, the liquid treated by the liquid treatment device is drinking water.Thus, the liquid treatment device for performing the method according to the invention may be a water filter system, a water reactor system or any system suitable for treating water.

[0039] The liquid treatment device is capable of acquiring data. The data is provided in the form of parameters characterizing the liquid treatment process. Within the framework of the present invention, "a parameter" and "the parameter" may mean "a single parameter", "at least one parameter" or "a plurality of parameters".

[0040] The parameter is determined by means for determining a parameter characterizing a liquid treatment process. Preferably, the means for determining said parameter comprises instructions for determining the parameter based on a value measured by a sensor for determining the parameter.

[0041] Parameters used to characterize a liquid treatment process may be, for example, the temperature of untreated and / or treated water, the conductivity of untreated and / or treated water, the water hardness of untreated water, the water hardness of treated water, the difference in water hardness of treated and untreated water, the ratio of treated liquid to untreated liquid (water bypassing the liquid treatment container), a value characterizing the purity of the treated liquid, the amount (volume or mass) of treated liquid since the liquid treatment device was maintained, or the time the liquid treatment device has been operated. Thus, a parameter may represent a measurement value determined by a sensor, an input value for any component of the liquid treatment device, or a return value from any component of the liquid treatment device.

[0042] The determined parameters are sent by the determining component, such as a sensor, to a processing unit of the liquid treatment device.The parameters are sent to the processing unit periodically or when the processing unit has sent a request for sending the parameters.

[0043] The step of determining the parameters may be performed at any time before sending the parameters. In one embodiment, the parameters are determined after identifying the plug-in module or after loading the instruction. Determining the parameters after the instruction is loaded has the advantage of being able to determine the parameters for the plug-in module and thus react to the type of plug-in module.

[0044] For interaction with the plug-in module, the liquid handling device, in particular the device head, comprises an plug-in module interface. Preferably, the device head comprises a single plug-in module interface for communicatively coupling the plug-in module independently of its function.

[0045] Any plug-in module for interacting with the liquid handling device may be coupled to the plug-in module interface, for example plugged into the plug-in module interface or wired to the plug-in module interface. To this end, the plug-in module includes a liquid handling device interface that matches the requirements of the plug-in module interface for connecting to the liquid handling device. Such requirements may include, for example, the same number of connection pins, the same interface standard, the same programming language or protocol specification, means for providing sufficient power supply, etc.

[0046] In addition, the plug-in module interface is preferably configured to be able to communicate with different types of plug-in modules. Within the framework of the present invention, the types of plug-in modules are distinguished by using different communication standards or having different functions. For example, one type of plug-in module can provide a display function. Another type of plug-in module can provide a memory function. Still another type of plug-in module can provide a communication function. And other types of plug-in modules can provide a combination of at least two of these or any other functions.

[0047] The liquid treatment device can work autonomously without the insertion module being coupled to the liquid treatment device. Of course, the features of the insertion module are not available to the liquid treatment device. However, as long as the liquid treatment medium is capable of treating the liquid, the treatment process can continue without the insertion module.

[0048] In one embodiment, the connection of the plug-in module to the liquid handling device may be established when the liquid handling device is in operation or only when the liquid handling device is shut down.

[0049] After being connected to the liquid handling device, the insert module is identified by the processing unit using the means for identifying the insert module. The identification includes determining the type of the insert module, its function and its identification number and its function (if any). In other words, identifying the insert module means that the type of the insert module is identified as a type of insert module that is compatible with the device head.

[0050] If the plug-in module is identified, the processing unit loads instructions from the memory unit using a device for loading instructions from the memory unit. The instructions are instructions for the processing unit to handle parameters according to the connected plug-in module. For example, a first plug-in module may require the processing unit to execute a first instruction, while a second plug-in module may require the processing unit to execute a second instruction. Therefore, the instructions loaded may depend on the type of plug-in module connected.

[0051] The memory unit may provide instructions for one or more types of plug-in modules including different communication standards for different types of plug-in modules. For example, a display plug-in module and a memory plug-in module may use different communication standards. By providing several communication standards stored in the memory unit, the liquid handling apparatus may operate with many different types of plug-in modules.

[0052] After the instructions are loaded into the processing unit, parameters characterizing the liquid treatment process may be sent to the plug-in module for further processing, depending on the functionality of the plug-in module. The parameters are sent using means for sending the parameters via the plug-in module interface in accordance with the instructions, which may include a protocol that sends the parameters to the plug-in module as a data packet or a data stream, depending on the functionality of the plug-in module.

[0053] Both the device head and the plug-in module include means for mechanically coupling the liquid handling device to the plug-in module or vice versa. Although the means for mechanical coupling can be integrated into the mechanical components of the interface, dedicated means for mechanical coupling are preferred due to greater stability and robustness. For example, a common USB flash drive does not include any means for mechanically coupling the drive to a host computer, but rather the USB plug itself, which may not be as strong as if the drive were screwed or otherwise secured to the computer. Therefore, the dedicated means for mechanical coupling strengthens the connection between the plug-in module and the liquid handling device.

[0054] The means for mechanically coupling both the device head and the plug-in module are preferably means for releasably coupling.

[0055] By outsourcing functionality to plug-in modules, the liquid handling device can be upgraded or downgraded as needed at any time by simply adding, replacing or removing plug-in modules. It is not necessary to replace the entire liquid handling device or device head in order to enhance or change functionality. Thus, the above-mentioned problem is solved by outsourcing optional functionality to one or more plug-in modules that can be connected to the liquid handling device.

[0056] In one embodiment, the step of identifying the plug-in module comprises the following steps:

[0057] i. Sending an identification request to the plug-in module via the plug-in module interface; and

[0058] ii. Receiving a response to the identification request from the plug-in module.

[0059] Thus, means for identifying a plug-in module (40) includes means for sending an identification request to the plug-in module (40) via the plug-in module interface (36); and means for receiving a response to the identification request from the plug-in module (40) via the plug-in module interface (36).

[0060] The liquid handling device can detect the plug-in module at the plug-in module interface by applying a test current to the plug-in module interface. Optionally, the liquid handling device can detect the plug-in module at the plug-in module interface by repeatedly sending an identification request. In a third variant, the plug-in module can be connected to the liquid handling device when the liquid handling device is turned off. When the liquid handling device is started, it attempts to detect the plug-in module at the plug-in module interface. If there is no plug-in module, the liquid handling device begins to operate as usual. If the liquid handling device detects the plug-in module at the plug-in module interface, it can send an identification request to the plug-in module, and if the identification is successful, start using the plug-in module function.

[0061] The insert module is coupled to the liquid treatment device by using its liquid treatment device interface. In other words, the liquid treatment device interface of the insert module and the insert module interface of the liquid treatment device are coupled to each other.

[0062] The identification request triggers the plug-in module to send a response to the liquid handling device. The response may include the ID number of the plug-in module, its model number or other means for identification, which are suitable for determining the identity or type of the plug-in module. The identification also shows the liquid handling device what functions the plug-in module can provide to the liquid handling device. After receiving the plug-in module response, the processing unit of the liquid handling device can load instructions from the memory unit according to the received ID number or other means for identification.

[0063] In the absence of an identification request, the liquid handling device will only detect that the plug-in module is any plug-in module at the plug-in module interface. Then, general instructions on how to handle the parameters in general will have to be loaded. The sending of the identification request and the receiving of the response to the identification request enable a more precise selection of instructions for handling the parameters. The response of the plug-in module can, for example, provide a correct and precise identification of the plug-in module. Thus, the processing unit can select more specific instructions for handling the parameters depending on the model of the connected plug-in module or its type.

[0064] In one embodiment, the plug-in module is a plug-in communication module connectable to at least one external system, and the device for functional processing is a device for communicating with the external system. The communication with the external system at least includes sending parameters from the plug-in module to the external system via wired communication or wireless communication. The method also includes sending parameters from the plug-in module to the external system via wired communication or wireless communication.

[0065] The external system may be any suitable system for receiving and processing data from the liquid treatment device. It may be provided as a personal computer, a server, a cloud computing environment, a smart phone, a fax machine, a pager, a smart watch, a diagnostic device for the liquid treatment device, a coffee machine, a steamer or a humidifier, a dishwasher, a dispensing system for beverages (in particular a water dispenser), a beverage vending machine or any other electronic system.

[0066] The communication between the plug-in module and the external system can be performed by an electronic connection via a cable or by an optoelectronic connection (i.e., fiber optic cable). A wired connection offers the advantage of being safer and more difficult to monitor. In particular, direct wired communication between the plug-in module and the external system without any additional device having to be physically manipulated to monitor the communication.

[0067] Alternatively, the communication may be performed via wireless communication, such as radio communication, near field communication, radio frequency identification, wireless local area network, optical communication (such as infrared communication or ultrasonic signals). In any case, the communication may include communication via a global network (such as the Internet, an intranet, a (wireless) local area network), or communication from the liquid handling device via an insert module directly to an external device without using any additional network at all.

[0068] Wireless communication offers the advantage of being independent of any cables. The liquid handling device can, for example, be moved to another location without the hassle of re-laying cables.

[0069] In another embodiment, the communication between the liquid handling device and the external system is encrypted.

[0070] Encrypted communications make the liquid handling device more difficult to monitor.

[0071] In one embodiment, the liquid treatment device further comprises a liquid treatment container and a sensor, wherein the sensor is communicatively connected to the processing unit, and the parameter characterizing the liquid treatment process is a parameter characterizing the liquid passing through the liquid treatment container. The parameter is preferably determined by a sensor for measuring the parameter (such as a sensor for measuring water hardness or a flow meter).

[0072] Furthermore, the input value of the valve motor for controlling the mixing valve, which controls the ratio of the liquid portion that is treated to the liquid portion that is not treated by the liquid treatment device, can be monitored. However, determining the parameters directly from the treated liquid or from the liquid to be treated can increase the efficiency of the treatment process by having direct feedback.

[0073] In yet another embodiment, the method includes a step of receiving instructions from an external system or the plug-in module itself by the liquid treatment device via the plug-in module. Therefore, the liquid treatment device is configured to receive instructions from an external system or the plug-in module itself via the plug-in module, and further process the instructions. The external system or the plug-in module can be an input device providing a human-machine interface. For example, the plug-in module can be an inserted display device having a touch display, a keyboard or button for receiving input from a user, or any combination thereof. Upon receiving the input, the liquid treatment device can change one or more of its operating values. The operating value may include, for example, but not limited to, an operating state-on and off, a value for controlling the above-mentioned valve motor or an offset for resetting the operating time or liquid volume since the last maintenance to zero, a target carbonate hardness (which is a nominal value of the water hardness after the treatment process), or any treatment medium specific value (such as a filter specific value). In order to change the operating value, the processing unit includes a device for processing and executing instructions received from the plug-in module or the external system.

[0074] With the ability to receive and process inputs, the method and liquid treatment device can not only read out, but also readjust the liquid treatment device according to changed conditions. For example, the above-mentioned mixing valve can be adjusted according to the input value from the sensor used to determine the hardness of the water after the water treatment process. If the water hardness of the water at the sensor is too high, the valve motor can be controlled to adjust the mixing valve to a more closed position, in which the ratio of treated water to untreated water is increased. Conversely, if the water hardness of the water at the sensor is too low, the valve motor can be controlled to adjust the mixing valve to a more open position, in which the ratio of treated water to untreated water is reduced.

[0075] In an embodiment, the system further comprises a terminal, and the means for functional processing of parameters is a means for communicating with the terminal;

[0076] The terminal comprises:

[0077] Terminal processing unit;

[0078] Terminal memory unit;

[0079] means for communicating with plug-in modules; and

[0080] A device for receiving parameters from a plug-in module;

[0081] The insertion module further comprises:

[0082] A device for executing instructions received from a terminal.

[0083] Preferably, the terminal can be configured as a web-based computing unit, in particular a computing unit communicatively coupled to the liquid treatment device via a network, in particular the Internet. A network-based or web-based connection to the terminal provides functions of the liquid treatment device that can be accessed remotely. For example, a user can remotely check the status of the liquid treatment medium by accessing the parameters via the terminal. Another advantageous embodiment comprises a terminal providing a cloud service for online storage and processing of parameters.

[0084] Furthermore, a system comprising a liquid handling device and a terminal as an integral part of the system advantageously provides communications which may be more secure than communications between the liquid handling device and an external system. Basically, the terminal and any external system may differ in that the terminal is known to the liquid handling device or registered at the liquid handling device, e.g. by pre-authentication.

[0085] Before the plug-in module and the terminal start communicating, the terminal may need to authenticate itself to the plug-in module, and vice versa. Therefore, the plug-in module may include a device for authenticating to the terminal, and the terminal may include a device for authenticating to the plug-in module. The device for authenticating may include a symmetric key or a paired asymmetric key. In the latter case, the device for authenticating the plug-in module includes a private key and a public key, wherein the public key is communicated to the terminal. The device for authenticating the terminal may also include a private key and a public key, wherein the public key is communicated to the plug-in module.

[0086] After mutual authentication, the plug-in module can start to provide its functions to the terminal. The functions provided to the terminal are at least the communication of parameters characterizing the liquid treatment process.

[0087] When the parameters are communicated to the terminal, the plug-in module can preferably be operated in one of two ways. First, the plug-in module can send the parameters to the terminal in an ongoing data stream while periodically or continuously updating the actual value of the parameter.

[0088] Secondly, the plug-in module provides the sending of parameters to the terminal. When providing the sending of parameters, the liquid treatment device should not send the parameters to the plug-in module when the plug-in module is waiting for a request to send parameters from the terminal. As long as there is no such request, the plug-in module and the liquid treatment device will just be idle. The terminal can automatically or manually (i.e., at user input) send a request for sending parameters from the liquid treatment device via the plug-in module. The request from the terminal is received by the plug-in module and forwarded to the liquid treatment device. Then, the request of the terminal triggers the instruction loaded from the memory unit of the liquid treatment system, and the parameter is sent to the plug-in module. Once the parameter is received, the plug-in module forwards the parameter to the terminal, where it is used, analyzed or disposed of.

[0089] In an embodiment, where the user gives input to the terminal to send a request for sending a parameter, the user may also select which parameter he wants to send, if the liquid handling device is capable of providing more than one parameter.

[0090] In another embodiment, the terminal is a server configured to communicate with a plurality of liquid treatment devices, each of which is coupled to an insert communication module. The liquid treatment devices may be water treatment systems that are placed in many homes, stores, or offices for treating drinking water. All liquid treatment devices are registered at the server and connected to the server via their insert communication modules. "Registered at the server" means that the server is able to establish communication with the liquid treatment devices.

[0091] The liquid handling device may send parameters to the server upon manual or automatic request from the server or periodically at predetermined time intervals. The server may save, monitor or analyze the parameters from the liquid handling device alone, or it may provide the parameters to a technician. If the liquid handling device detects a fault or a parameter is outside its determined range, the server may send instructions to restart or readjust the liquid handling device or its components, respectively. Alternatively, or if restarting or readjusting does not solve the problem, the server may send a message to the technician, who may issue the message to repair or replace the liquid handling device.

[0092] In another embodiment, the plug-in module can receive instructions for displaying parameters on an onboard display, for saving parameters to a memory unit of the plug-in module, for sending parameters characterizing the plug-in module itself (such as ID number, available memory space, operating time, etc.).

[0093] In one embodiment, the means for functional processing of parameters comprises a display for displaying the parameters, a mass memory module comprising a memory for storing the parameters or a combination thereof, or a special interface, for example for user-specific solutions.

[0094] For example, the plug-in module includes a display for displaying the parameter or parameters and other values ​​to a user of the system. In another example, the plug-in module includes a memory unit for saving the parameters over time, preferably for later analysis and optimization of the liquid treatment process. In yet another example, the plug-in module may include a memory unit and a display for saving the parameters and displaying the saved parameter values ​​to the user via the display.

[0095] In one embodiment, the plug-in module includes a plurality of devices for functional processing. However, the plug-in module communicates with the liquid handling device only via the liquid handling device interface and the plug-in module interface of the device head.

[0096] In one embodiment, the means for mechanically coupling the plug-in module to the liquid treatment device and the means for mechanically coupling the liquid treatment device to the plug-in module are formed as a pair of releasable interlocking means.

[0097] The interlocking means forms a plug connection, preferably a form-locking connection.

[0098] In another embodiment, the device for mechanically connecting the insertion module to the liquid treatment device and / or the device for mechanically connecting the liquid treatment device to the insertion module is configured to enter a retaining state for locking the connection between the insertion module and the liquid treatment device and a release state for removing the insertion module from the liquid treatment device.

[0099] Changing the state of the means for mechanical coupling from a retaining state to a releasing state enables the insert module to be easily inserted into and removed from the liquid handling device. Preferably, the user applies no force or only a small force to change the state of the means for mechanical coupling from one state to another.

[0100] In one embodiment, the device head further comprises a housing portion in which at least the plug-in module interface is arranged and which comprises means for mechanically coupling the liquid treatment device to the plug-in module.

[0101] Preferably, the means for mechanically coupling the liquid handling device to the plug-in module is integrally formed with the housing portion of the device head. Advantageously, the housing portion protects the device head and its electronic components from moisture, dust, dirt or mechanical damage.

[0102] In one embodiment, the insert module further comprises a housing part in which at least the liquid handling device interface is arranged and which comprises means for mechanically coupling the insert module to the liquid handling device.

[0103] Preferably, the means for mechanically coupling the plug-in module to the liquid handling device is integrally formed with a housing portion of the plug-in module. Advantageously, the housing portion protects the device head and its electronic components from moisture, dust, dirt or mechanical damage.

[0104] Preferably, the housing portion of the device head and the housing portion of the insert part fit together in a sealing manner to form a closed housing that protects the electronic components of both the device head and the insert module from moisture, dust, dirt or mechanical damage.

[0105] In one embodiment, the liquid handling device and the plug-in module further comprise means for authenticating the plug-in module to the liquid handling device.

[0106] Within the framework of the present invention, there is a difference between identification and authentication. As mentioned above, identifying a plug-in module means that the type of the plug-in module is recognized as a type of plug-in module compatible with the device head. Authenticating a plug-in module means that the plug-in module has access rights to receive parameters from the device head.

[0107] In one embodiment, authentication of the plug-in module requires identification of the plug-in module.

[0108] Preferably, the means for authenticating the plug-in module to the liquid handling device comprises a pair of symmetric or asymmetric keys, which are respectively assigned to the liquid handling device and the plug-in module. The authentication process may comprise exchanging signatures, which are encrypted with one of the keys and decrypted with the other.

[0109] In one embodiment, the liquid handling device comprises a status indicator and the plug-in module comprises means for forwarding a signal from the status indicator.

[0110] The signal from the status indicator may, for example, indicate an operational state of the liquid handling device, such as "power on" or whether it is active.

[0111] In one embodiment, the status indicator is a light source, preferably an LED, and the means for forwarding the signal from the status indicator is a light guide or fiber optic cable that forwards the light from the light source to the surface of the plug-in module. For example, when the light source is located at or inside the housing portion of the device head, the light guide within the housing portion of the plug-in module forwards the light signal from the status indicator to a window in the surface of the housing portion of the plug-in module so as to be visible from the outside.

[0112] The light source may have two states, which indicate at least two states of the liquid handling device. For example, a light source that emits light may indicate activity of the liquid handling device, while a light source that does not emit light may indicate inactivity of the liquid handling device. Optionally, the two states may be indicated by light of different colors.

[0113] In one embodiment, the liquid treatment medium is a filter medium. In this embodiment, the liquid treatment device is a filter device.

[0114] In another aspect, the present invention relates to an insert module for a liquid treatment device as described above, wherein the insert module comprises a liquid treatment device interface for connecting to the liquid treatment device, means for identifying the insert module to the liquid treatment device, means for receiving parameters characterizing a liquid treatment process from the liquid treatment device, and means for functionally processing the parameters. Preferably, the liquid treatment device interface is arranged for communicatively coupling the insert module to the liquid treatment device, and the insert module further comprises: means for mechanically coupling the insert module to the liquid treatment device.

[0115] The plug-in module may be communicatively coupled to the liquid handling device via a liquid handling device interface. The liquid handling device interface of the plug-in module and the plug-in module interface of the liquid handling device may be formed as a pair consisting of a male connector and a female connector. Furthermore, both the liquid handling device interface and the plug-in module interface may preferably be universal asynchronous receiver transmitter (UART) interfaces.

[0116] Additionally, the plug-in module may be mechanically coupled to the liquid handling device via means for mechanically coupling the plug-in module to the liquid handling device.The means for mechanical coupling relieve mechanical stress from the interface.

[0117] In another embodiment, the means for identifying the plug-in module to the liquid handling device comprises: means for receiving an identification request from the liquid handling device via the liquid handling device interface and means for sending a response to the identification request to the liquid handling device via the liquid handling device interface. The response may include an identification number of the plug-in module characterizing the type of the plug-in module. In another embodiment, the response may include a serial number of the plug-in module identifying the plug-in module itself.

[0118] The plug-in module may preferably comprise a processing unit, which may be, for example, a single-core or multi-core microprocessor, a field programmable gate array, a microcontroller or any other device capable of executing program code.

[0119] The form of the device used for functional processing depends on the function of the plug-in module.

[0120] In one embodiment, the plug-in module is a plug-in memory module that can be exchanged to obtain data analysis while another plug-in memory module is provided to the liquid handling device to continue operation. Then, the device for functional processing of the plug-in memory module is a non-volatile memory unit and a processing unit configured to store the parameters received from the liquid handling device into the memory of the plug-in memory unit module.

[0121] In another embodiment, the insert module is an insert display module for displaying parameters to a user. The device for functionally processing the parameters of the insert module is in the form of a display and a processing unit, which is configured to display the parameters on the display of the insert module. In yet another embodiment, the liquid handling device can receive input from the insert display module, wherein the insert display module includes a touch display or a display combined with an input device (e.g., a keyboard, one or more buttons, a microphone, or any combination thereof). In these embodiments, the insert display module is a human-machine interface.

[0122] In one embodiment, the plug-in module is a plug-in communication module connectable to at least one external system, and the means for function processing is a means for communicating with the external system via wired or wireless communication and sending at least parameters from the plug-in module to the external system.

[0123] The plug-in module as a plug-in communication module for wired communication includes a plug for plugging in an electrical cable or fiber optic cable. Alternatively, it may include an electrical cable or fiber optic cable for plugging in an external system.

[0124] The plug-in module, which is a plug-in communication module for wireless communication, includes a wireless communication interface, ie, an antenna, an infrared sensor and an infrared light source, or an ultrasonic sensor and an ultrasonic speaker.

[0125] In one embodiment, the insert module is powered (or supplied with power) via a connection to the liquid handling device through the insert module interface and the liquid handling interface. In another embodiment, the insert module is powered through a separate connection for power. In yet another embodiment, the insert module may include an onboard power source, such as a rechargeable or replaceable battery.

[0126] In another aspect, the present invention relates to a method for operating a system as described above, wherein the method comprises:

[0127] Determining parameters characterizing the liquid treatment process by means of a device for determining parameters of the liquid treatment device and sending the parameters to a processing unit of the liquid treatment device;

[0128] Receiving parameters via a processing unit of the liquid handling device;

[0129] connecting the means for mechanically coupling the liquid handling device to the insert module of the liquid handling device with the means for mechanically coupling the insert module to the liquid handling device of the insert module to mechanically couple the insert module to the liquid handling device; and

[0130] Communicatively coupling the plug-in module to the liquid handling device by connecting the plug-in module interface with the liquid handling device interface;

[0131] Detecting that the plug-in module is coupled to the liquid handling device via the plug-in module interface and the liquid handling device interface by monitoring a signal response sent from a processing unit of the liquid handling device to the plug-in module interface;

[0132] upon detecting that the plug-in module is coupled to the liquid treatment device, identifying the plug-in module by the processing unit of the liquid treatment device;

[0133] In response to identifying the plug-in module, loading instructions for handling parameters from the memory unit to the processing unit of the liquid handling device;

[0134] sending the parameters to the plug-in module via the plug-in module interface and the liquid handling device interface according to instructions from the processing unit of the liquid handling device;

[0135] When the parameters are received from the liquid handling device, the parameters are processed using the means of the plug-in module for functional processing of the parameters.

[0136] In one embodiment, identifying the plug-in module comprises the following steps:

[0137] sending an identification request from the liquid handling device to the plug-in module via the plug-in module interface and the liquid handling device interface; and

[0138] • Receiving a response to the identification request from the plug-in module via the plug-in module interface and the liquid handling device interface, wherein the response to the identification request includes information about the type of the plug-in module.

[0139] In one embodiment, a first key is assigned to the plug-in module and a second key is assigned to the liquid handling device, wherein before sending the parameters to the plug-in module, the method comprises the following steps:

[0140] · sending an authentication request from the liquid handling device to the plug-in module via the plug-in module interface and the liquid handling device interface;

[0141] receiving a response to the authentication request from the plug-in module via the plug-in module interface and the liquid handling device interface, wherein the response to the authentication request includes a signature of the plug-in module encrypted with the first key;

[0142] The processing unit of the liquid handling device decrypts the signature from the plug-in module using the second key;

[0143] verifying the decrypted signature from the plug-in module with a list of authorized signatures, wherein the list of authorized signatures is stored in a memory unit of the liquid handling device;

[0144] Therein the parameters are sent to the plug-in module only if verification of the decrypted signature from the plug-in module results in the plug-in module being authenticated to receive the parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0145] Figure 1 is a flow chart of a method according to an embodiment of the present invention.

[0146] Figure 2 is a schematic diagram of a liquid handling device and an insertion module according to an embodiment of the present invention.

[0147] Figure 3 is a schematic diagram of a system according to an embodiment of the present invention.

[0148] Figure 4 is a perspective view of a device head without a plug-in module coupled thereto.

[0149] Figure 5 is a perspective view of an insert module; and

[0150] Figure 6 is a perspective view of a device head having a plug-in module coupled thereto. DETAILED DESCRIPTION

[0151] Figure 1A flow chart is shown which illustrates a method according to an embodiment of the invention. The method starts at step S02 when the liquid treatment device is put into operation or when an insert module is coupled to the liquid treatment device. This depends on whether the insert module can be inserted when the liquid treatment device is activated, or whether the liquid treatment device must be shut down to install the insert module.

[0152] After starting the method at step S02, when the liquid treatment device is put into operation, the liquid treatment device may try to detect the plug-in module at the plug-in module interface. For detection, the liquid treatment device or more precisely the processing unit of the liquid treatment device may provide a test current at the plug-in module interface, for example.

[0153] If the plug-in module is successfully detected at the plug-in module interface, the processing unit sends an identification request to the plug-in module at step S04. For example, the identification request may include instructions for causing the plug-in module to return an identification number or number indicating the type of the plug-in module (the identification number or number may be stored in a memory unit of the plug-in module), or for responding to an authentication process.

[0154] Upon receiving the identification request, the plug-in module responds with an identification response, which is received by the liquid handling device at step S06. The response preferably includes a request value for identifying the plug-in module.

[0155] If the plug-in module is successfully identified, then at step S08, the processing unit of the liquid treatment device loads instructions corresponding to the identified plug-in module. The loaded instructions may include, for example, instructions for selecting which parameter to send, when and how to send the parameter, or whether a request for the parameter must be received from the plug-in module or an external system via the plug-in module before sending the parameter.

[0156] If the plug-in module is not successfully identified, the processing unit of the liquid treatment device may retry sending an identification request to the plug-in module, or may retry detecting the plug-in module at the plug-in module interface.

[0157] If the instruction comprises a command to wait for a parameter request, the processing unit of the liquid treatment device enters an idle mode waiting for the parameter request. The liquid treatment device is now ready to send the parameters to the plug-in module, i.e. the liquid treatment device provides for the sending of the parameters to the plug-in module. At step S10, the parameter request may be received from an external system (e.g. a terminal or a personal computer) via the plug-in module. Alternatively, the parameter request may be received from the plug-in module itself, e.g. if the plug-in module is an plug-in display module providing a human-machine interface and receiving input from a user to process or display specific parameters in a display of the plug-in module.

[0158] If the instructions do not comprise a command to wait for a parameter request, but rather comprise a command for sending parameters via the plug-in module or broadcasting parameters via the plug-in module, step S10 may be skipped, as indicated by the dashed arrow. The method continues with step S12, obtaining the parameters.

[0159] In order to obtain the parameter, the processing unit of the liquid treatment device can read the sensor of the liquid treatment device or obtain the setting value of one or more components of the liquid treatment device. The parameter read from the sensor can be the water hardness, conductivity, Ca content, Fe content, etc. of the liquid, or it can be the setting value of the valve, valve motor or other components in the liquid treatment device.

[0160] Step S12 may also be performed continuously while the other steps are performed in parallel. Furthermore, step S12 may optionally be performed before the previous steps S04-S10, since identifying the plug-in module is not necessary for obtaining the parameters. In some embodiments, the instructions loaded in S08 may determine the parameters to be obtained in step S12. Then, of course, step S12 is performed after step S08, such as Figure 1 as shown in .

[0161] When the processing unit of the liquid handling device has obtained the parameters and the plug-in module has been successfully identified, the parameters are sent to the plug-in module in step S14. As described above, the parameters can be broadcast, continuously streamed or sent according to the parameter request of the external system. After sending the parameters, the liquid handling device either returns to idle mode and waits for another parameter request, or it sends another parameter. This depends on whether the sending of the parameters requires a parameter request before sending the parameters. The options are Figure 1 Indicated by the dotted arrow in .

[0162] Figure 2 A schematic diagram of a liquid treatment device 10 and an insertion module 40 according to an embodiment of the present invention is shown. The liquid treatment device 10 shown here includes a liquid treatment container 12 filled with a liquid treatment medium 14. The liquid treatment device 10 also includes a device head 16 connected to the liquid treatment container 12. Although the name "head" indicates that the device head 16 is located on the top of the liquid treatment container 12, the device head 16 can also be located below, beside or inside the liquid treatment container 12. The liquid treatment container 12 and the device head 16 can be removably connected to each other, or they can share a common housing. Using a removably connected liquid treatment container 12 has the following advantages: if the liquid treatment medium 14 is exhausted or depleted, it is possible to replace only the liquid treatment container 12, wherein the device head 16 can remain connected to its application point. In this case, the liquid treatment container 12 can be formed as a cartridge, which is connected to the device head 16.

[0163] The device head 16 includes an inlet 20 and an outlet 22. In the liquid treatment device 10, liquid flows from the inlet 20 through a pipeline 24. The inlet 20 located at the end of the pipeline 24 is connected to a liquid supply device, such as a water supply pipe. The flow direction of the liquid in the pipeline 24 is indicated by an arrow.

[0164] The liquid flows into the liquid treatment medium 14 through the pipeline 24 and is treated in the liquid treatment medium 14. For example, the liquid treatment medium 14 is a reaction medium that reacts with the liquid, or it is a filter medium for filtering the liquid. After being treated, the liquid leaves the liquid treatment container 12 and enters the pipeline 25, which is connected to the outlet 22. The liquid can then flow out of the liquid treatment device 10 through the outlet 22, which can be connected to a faucet or another pipe, for example.

[0165] In the illustrated embodiment, line 24 has a shortcut to line 25. The shortcut can be opened or closed by a mixing valve (not shown) controlled by a valve motor 26. In an alternative embodiment, the shortcut can be controlled by an orifice or other electromechanical component. The mixing valve controls the liquid portion flowing through the shortcut and flowing through the liquid treatment medium 14. To this end, the valve motor 26 is controlled by using a signal including a motor control value to set the mixing valve open, partially open or closed. The motor control value can be a parameter that will be sent to the insertion module 40, as described later.

[0166] Figure 2 The device head 16 also includes a group of sensors 28 and 30 to measure the parameters of the liquid. The parameters determined by the sensor 28 can be, for example, water hardness, conductivity, Ca content, Fe content, etc. before treatment, and the parameters determined by the sensor 30 can be, for example, water hardness, conductivity, Ca content, Fe content, etc. after treatment. The treatment efficiency can be determined by measuring the parameters before and after treatment. Measuring the parameters after treatment may be sufficient in many cases, because, for example, the characteristics of the treated liquid provided for further treatment or for consumption or the quality of the treated liquid are more important values, which should preferably be maintained at a constant level. In industrial applications, the parameters can be used for the next production step using the liquid. The parameters determined by the liquid treatment device 10 can be used as input values ​​for another device or system, or as, for example, a control variable for setting a valve position.

[0167] Figure 2 The device head 16 shown in FIG. 1 further comprises a processing unit 32 and a memory unit 34 for controlling the operation of the liquid treatment apparatus 10 and for treatment parameters. The liquid treatment apparatus 10 may be controlled by an operating system stored on the memory unit 34 and running on the processing unit 32.

[0168] The device head 16 also includes an insertion module interface 36 for coupling the liquid treatment device 10 to the insertion module 40. The insertion module 40 on the other side includes a liquid treatment device interface 42 for coupling the insertion module 40 to the liquid treatment device 10. Both the liquid treatment device interface 42 and the insertion module interface 36 are interfaces for plug-and-play appliances, i.e., the insertion module 40 can be simply plugged into the insertion module interface 36 to provide the liquid treatment device 10 with its functions.

[0169] To prevent the unwanted separation of the insert module 40 from the liquid treatment device 10, both may include means (not shown here) for fixing or mechanically coupling the insert module to the liquid treatment device. The means for fixing may be, for example, screws, bolts, latch connections, bayonet connections or other clamping devices.

[0170] Figure 2 The plug-in module 40 shown in FIG. 4 comprises its own processing unit 44 for processing an operating system of the plug-in module 40 , or for handling incoming identification requests or parameter requests or other tasks performed by the plug-in module 40 .

[0171] also, Figure 2 The insertion module 40 shown in FIG. 1 is used to connect the liquid treatment device 10 to an external system (not shown here, see Figure 3 ) connection module. To this end, the insertion module 40 also includes a transmitting and receiving unit, which representatively shows an antenna 46 capable of wirelessly sending and receiving data. The insertion module 40 can connect the liquid treatment device 10 to a network or router (neither of which is shown) by providing a communication function. For example, the liquid treatment device 10 can send parameters measured by the sensors 28 and 30 and processed by the processing unit 32 of the device head 16 to the insertion module 40 via the insertion module interface 36 and the liquid treatment device interface 42, and the insertion module 40 forwards the parameters wirelessly to the external system by using the processing unit 44 and the antenna 46 of the insertion module 40.

[0172] In alternative embodiments and depending on the functionality of the plug-in module 40, the antenna 46 may be replaced or accompanied by a memory unit, a display module, an input interface such as a keyboard or buttons or any combination thereof, or a special interface for a user-specific solution.

[0173] Figure 3 A schematic diagram of a system 60 according to an embodiment of the present invention is shown. The system comprises a terminal, which is a server 62. The server 62 is connected to a network 64. In this embodiment, the network 64 may be the Internet. In other embodiments, it may be an intranet or a (wireless) local area network.

[0174] A plurality of homes, shops, offices or other buildings are provided with access points 66. Each building is also provided with a liquid treatment device 10 and a plug-in module 40, which is a plug-in communication module. Each liquid treatment device 10 and plug-in module 40 is registered at a server 62.

[0175] The parameters determined by the liquid treatment device 10 may be, for example, parameters that characterize the efficiency of the treatment process. The server 62 may also be configured to send parameter requests to the liquid treatment device 10 via the network 64 and the plug-in module 40. It may also be configured to receive parameters from the liquid treatment device 10 via the network 64 and the plug-in module 40 of each access point 66. The communication between the liquid treatment device 10 and the server 62 may preferably be encrypted.

[0176] In order to encrypt the communication, an asymmetric encryption method is preferably used. Therefore, the server can have a public key and a private key, wherein each liquid treatment device 10 or its insertion module 40 also has a public key and a private key. Each pair of public keys and private keys is configured to encrypt data with a public key, and only the encrypted data is decrypted with the corresponding private key of the same pair. In order to use asymmetric encryption, the public keys of the server 62 and the liquid treatment device 10 are exchanged. When sending data to each other, each sending entity encrypts the data using the public key of the receiving entity. The receiving entity on the other side decrypts the data by using its private key. Therefore, only the destination receiving entity holding its own private key can decrypt the data.

[0177] The server 62 may also be configured to monitor the proper operation of the liquid handling devices 10 at each access point 66. If one of the parameters received from one of the liquid handling devices 10 is different from the other parameters, the server 62 may send a notification notifying a technician of a failure of the liquid handling device 10. Thus, the server 62 and the provider of the liquid handling devices 10 may ensure a quick response to maintenance.

[0178] Figure 4 An embodiment of the device head 16 is shown in a perspective view from above. The device head 16 comprises a housing portion 70 having an opening at the top to allow viewing of the electronic components inside. In particular, a main printed circuit board 72 can be seen, on which at least some of the electronic components of the device head 16, in particular the processing unit and the plug-in module interface, are arranged. Means for mechanically coupling the liquid treatment device to the plug-in module are included in the housing portion 70 of the device head 16 in the form of a circumferential edge 74 around the opening. In this embodiment, a light source, in particular an LED 76, is placed on the main printed circuit board 72 as a status indicator, for example, to indicate one or more operating conditions of the liquid treatment device.

[0179] Figure 5An embodiment of the insert module 40 is shown in a perspective view from below. The insert module includes a housing portion 80, which is open at the bottom to allow observation of the electronic components inside. In particular, it can be seen that a printed circuit board 82 is releasably attached to the housing portion 80 by a plurality of clips 84. The electronic components of the insert module 40, namely a liquid handling device interface, a device for identifying the insert module 40 to the liquid handling device, a device for receiving parameters characterizing the liquid handling process from the liquid handling device, and a device for functional processing of the parameters are arranged on the insert module printed circuit board 82. By being releasably attached to the housing portion 80, the printed circuit board 82 according to this preferred embodiment is configured to be easily replaced with another printed circuit board providing different functions. The device for mechanically connecting the insert module 40 to the liquid handling device is included in the housing portion 80 of the insert module 40, which takes the form of a circumferential wall 86 of the housing portion 80 and a plurality of latches 88 inside it. The insert module also includes a light guide 90 for forwarding light from the LED 76 to a window 92 in the surface of the housing portion 80 of the insert module 40, see Figure 6 .

[0180] like Figure 6 As shown in , the housing portion 70 of the device head 16 is arranged to be enclosed by the housing portion 80 of the insert module 40. In the assembled state, as described above, the insert module interface and the liquid treatment device interface communicatively couple the insert module and the liquid treatment device. In addition, the LED 76 and the light guide 90 are positioned side by side to allow light emitted by the LED 76 to enter the light guide and transmit it to the window 92. The circumferential wall 86 of the insert module housing portion 80 encloses the edge 74 of the device head housing portion 70, thereby enclosing the device head in a sealed manner to form a closed housing, thereby protecting the electronic components of both the device head and the insert module from moisture, dust, dirt or mechanical damage. Therefore, the insert module housing portion 80 forms a cover for the device head housing portion 70. In addition, in the closed state, the latch 88 engages with the corresponding recess or hole (not shown) in the edge 74, thereby fixing the insert module 40 to prevent accidental falling from the device head 16. Therefore, the latch 88 and the corresponding hole or recess are a device for mechanically coupling the insert module 40 to the liquid treatment device, which is formed as a pair of releasable interlocking devices. Additionally, screws 94 secure the insert module housing portion 80 to the device head housing portion 70 .

[0181] List of Reference Numerals

[0182] S02 Start

[0183] S04 Send identification request

[0184] S06 Receive identification response

[0185] S08 Load Instructions

[0186] S10 receives parameter request

[0187] S12 Get parameters

[0188] S14 Send Parameters

[0189] 10Liquid handling device

[0190] 12 Liquid handling containers

[0191] 14Liquid handling media

[0192] 16 device head

[0193] 20Entrance

[0194] 22Exit

[0195] 24 pipelines

[0196] 25 pipelines

[0197] 26 valve motor

[0198] 28 sensors

[0199] 30 sensors

[0200] 32 processing units

[0201] 34 memory cells

[0202] 36 plug-in module interface

[0203] 40 plug-in modules

[0204] 42 Liquid handling device interface

[0205] 44 processing units

[0206] 46 Antenna

[0207] 60 systems

[0208] 62 servers

[0209] 64 Network

[0210] 66 access points

[0211] 70 Shell part of the device head

[0212] 72 Main printed circuit board of the device head

[0213] 74 Circumferential Edge

[0214] 76LED

[0215] 80 Insert the housing part of the module

[0216] 82 PCB inserted into the module

[0217] 84 Clips

[0218] 86 Circumferential wall

[0219] 88 Latch

[0220] 90 Light Guide

[0221] 92 windows

[0222] 94 screws.

Claims

1. A method for operating a liquid treatment device (10), characterized in that The liquid treatment device (10) comprises a processing unit (32), a storage unit (34) and an insertion module interface (36) for connecting to an insertion module (40). wherein the plug-in module interface (36) is configured to be able to communicate with different types of plug-in modules (40), wherein the types of plug-in modules (40) are distinguished by using different communication standards or having different functions, wherein the memory unit (34) and the plug-in module interface (36) are communicatively connected to the processing unit (32), The method comprises: Identifying, by the processing unit (32), a plug-in module (40) coupled to the plug-in module interface (36); In response to identifying the plug-in module (40), loading instructions from the memory unit (34) to the processing unit (32) for the processing unit (32) to handle parameters according to the connected plug-in module (40), wherein the loaded instructions depend on the type of the connected plug-in module (40); Determining parameters characterizing the liquid treatment process based on the loaded instructions and sending said parameters to a processing unit (32); receiving said parameters by a processing unit (32); and According to the instructions, the processing unit (32) sends the parameters to the plug-in module (40) via the plug-in module interface (36).

2. The method according to claim 1, characterized in that Identifying the insertion module (40) comprises the following steps: i. sending an identification request to the plug-in module (40) via the plug-in module interface (36); and ii. receiving a response to said identification request from the plug-in module (40).

3. The method according to claim 1, characterized in that The plug-in module (40) is a plug-in communication module, and the method further comprises: • Sending parameters from the plug-in module (40) to an external system via wired or wireless communication.

4. The method according to claim 1, characterized in that: The liquid processing device (10) further comprises a liquid processing container (12) and a sensor (28, 30), wherein the sensor (28, 30) is communicatively connected to the processing unit (32), and the parameter characterizing the liquid processing process is a parameter characterizing the liquid passing through the liquid processing container (12).

5. A liquid processing device (10), comprising: A liquid treatment container (12) containing at least one liquid treatment medium (14); Processing units (32); a memory unit (34) communicatively connected to the processing unit (32); and a plug-in module interface (36) for a plug-in module (40) coupled to the processing unit (32), wherein the plug-in module interface (36) is configured to be able to communicate with different types of plug-in modules (40), wherein the types of plug-in modules (40) are distinguished by using different communication standards or having different functionalities; means for identifying the inserted module (40); means for loading instructions from the memory unit (34) in response to identification of a plug-in module (40), the instructions for the processing unit (32) to handle parameters according to the connected plug-in module (40), wherein the loaded instructions depend on the type of plug-in module (40) connected; means for determining parameters characterizing a liquid handling process based on the loaded instructions; and • Means for sending parameters to the plug-in module (40) via the plug-in module interface (36) in accordance with the instructions.

6. The liquid treatment device (10) according to claim 5, characterized in that: The liquid treatment device (10) further comprises a device head adapted to be coupled to the liquid treatment container (12), the device head comprising: Processing units (32); A memory unit (34) communicatively connected to the processing unit (32); Devices for determining parameters characterizing a liquid handling process; A plug-in module interface (36) for communicatively coupling a plug-in module (40) to a processing unit (32); means for identifying the inserted module (40); means for loading instructions from a memory unit (34) in response to identification of a plug-in module (40); means for sending parameters to the plug-in module (40) via the plug-in module interface (36) in accordance with said instructions; and • Means for mechanically coupling the liquid handling device (10) to the insertion module (40).

7. The liquid treatment device (10) according to claim 5 or 6, characterized in that: The device for identifying the inserted module (40) comprises: means for sending an identification request to a plug-in module (40) via a plug-in module interface (36); and • Means for receiving a response to said identification request from a plug-in module (40) via a plug-in module interface (36).

8. An insertion module (40) for use in a liquid treatment device (10) according to any one of claims 5 to 7, characterized in that: The insertion module (40) comprises: A liquid handling device interface (42) for connecting to a liquid handling device (10); means for identifying the insertion module (40) to the liquid handling device (10); means for receiving parameters characterizing a liquid treatment process from a liquid treatment device (10), wherein the parameters characterizing the liquid treatment process are determined based on instructions loaded from a memory unit (34) of the liquid treatment device (10); and Devices used to perform functional processing on parameters.

9. The plug-in module (40) according to claim 8, characterized in that The liquid handling device interface (42) is arranged to communicatively couple the plug-in module (40) to the liquid handling device (10), the plug-in module further comprising: • Means for mechanically coupling the insert module (40) to the liquid handling device (10).

10. The plug-in module (40) according to claim 8 or 9, characterized in that The plug-in module (40) is a plug-in communication module that can be connected to at least one external system, and the device for function processing is a device for communicating with the external system via wired communication or wireless communication and sending at least parameters from the plug-in module (40) to the external system.

11. A system for liquid processing, the system comprising: · A liquid treatment device (10) according to any one of claims 5 to 7; as well as · A plug-in module (40) according to any one of claims 8 to 10.

12. A system for liquid treatment, the system comprising a liquid treatment device (10) and an insertion module (40), wherein the liquid treatment device (10) comprises a liquid treatment container (12) containing at least one liquid treatment medium (14) and a device head adapted to be coupled to the liquid treatment container (12), and wherein the insertion module (40) is configured to be inserted into the device head of the liquid treatment device (10), the device head comprising: Processing units (32); A memory unit (34) communicatively connected to the processing unit (32); a plug-in module interface (36) for communicatively coupling the plug-in module (40) to the processing unit (32), wherein the plug-in module interface (36) is configured to be able to communicate with different types of plug-in modules (40), wherein the types of plug-in modules (40) are distinguished by using different communication standards or having different functionalities; means for identifying the inserted module (40); means for loading instructions from the memory unit (34) in response to identification of a plug-in module (40), the instructions for the processing unit (32) to handle parameters according to the connected plug-in module (40), wherein the loaded instructions depend on the type of plug-in module (40) connected; means for determining parameters characterizing a liquid handling process based on the loaded instructions; means for sending parameters to the plug-in module (40) via the plug-in module interface (36) in accordance with said instructions; means for mechanically coupling the liquid handling device (10) to the insertion module (40); The insertion module (40) comprises: A liquid handling device interface (42) for communicatively coupling the plug-in module (40) to the liquid handling device (10); means for identifying the insertion module (40) to the liquid handling device (10); means for receiving parameters characterizing a liquid treatment process from a liquid treatment device (10), wherein the parameters characterizing the liquid treatment process are determined based on instructions loaded from a memory unit (34) of the liquid treatment device (10); Devices for performing functional processing on parameters; • Means for mechanically coupling the insert module (40) to the liquid handling device (10).

13. The system according to claim 12, characterized in that The device for identifying the inserted module (40) comprises: means for sending an identification request to a plug-in module (40) via a plug-in module interface (36); and • Means for receiving a response to said identification request from a plug-in module (40) via a plug-in module interface (36).

14. The system according to any one of claims 12 and 13, characterized in that The plug-in module (40) is a plug-in communication module that can be connected to at least one external system, and the device for function processing is a device for communicating with the external system, wherein the communication with the external system includes at least sending parameters from the plug-in module (40) to the external system via wired communication or wireless communication.

15. The system according to any one of claims 11 to 14, characterized in that The system further comprises: ·terminal; The terminal comprises: Terminal processing unit; Terminal memory unit; means for communicating with the plug-in module (40); and means for receiving parameters from a plug-in module (40), The insertion module (40) further comprises: A device for executing instructions received from a terminal.

16. The system according to claim 15, characterized in that The device for the functional processing of the parameter is a device for communicating with the terminal.

17. The system according to any one of claims 11 to 16, characterized in that The means for functional processing of parameters comprises a display for displaying the parameters, a mass storage module comprising a memory for storing the parameters, or a combination thereof.

18. The system according to any one of claims 12 to 17, characterized in that The means for mechanically coupling the plug-in module (40) to the liquid treatment device (10) and the means for mechanically coupling the liquid treatment device (10) to the plug-in module (40) are formed as a pair of releasable interlocking means.

19. The system according to any one of claims 12 to 18, characterized in that The device for mechanically connecting the insertion module (40) to the liquid treatment device (10) and / or the device for mechanically connecting the liquid treatment device (10) to the insertion module (40) is configured to enter a retaining state for locking the connection between the insertion module (40) and the liquid treatment device (10) and a releasing state for removing the insertion module (40) from the liquid treatment device (10).

20. The system according to any one of claims 12 to 19, characterized in that The device head further comprises a housing portion (70) in which at least the plug-in module interface (36) is located, and the housing portion (70) comprises means for mechanically coupling the liquid treatment device (10) to the plug-in module (40).

21. The system according to any one of claims 12 to 20, characterized in that The plug-in module (40) further comprises a housing portion (80), in which at least the liquid treatment device interface (42) is arranged, and the housing portion (80) comprises means for mechanically coupling the plug-in module (40) to the liquid treatment device (10).

22. The system according to any one of claims 11 to 21, characterized in that The liquid handling device (10) and the plug-in module (40) further comprise means for authenticating the plug-in module to the liquid handling device.

23. The system according to any one of claims 11 to 22, characterized in that The liquid handling device (10) comprises a status indicator, and the plug-in module (40) comprises means for forwarding a signal from the status indicator.

24. The system according to claim 23, characterized in that The status indicator is a light source, and the means for forwarding the signal from the status indicator is a light guide or fiber optic cable that forwards the light from the light source to a surface of the plug-in module.

25. The system according to any one of claims 11 to 24, characterized in that The liquid treatment medium (14) is a filter medium.

26. A method for operating a system according to any one of claims 12 to 25, wherein the method comprises: mechanically coupling the insert module (40) to the liquid treatment device (10) by connecting means for mechanically coupling the liquid treatment device (10) to an insert module (40) of the liquid treatment device (10) with means for mechanically coupling the insert module (40) to the liquid treatment device (10) of the insert module (40); and Communicatively coupling the plug-in module (40) to the liquid handling device (10) by connecting the plug-in module interface (36) with the liquid handling device interface (42); Detecting a plug-in module (40) coupled to the liquid handling device (10) via the plug-in module interface (36) and the liquid handling device interface (42) by monitoring a signal response sent from the processing unit (32) of the liquid handling device (10) to the plug-in module interface (36); upon detecting the plug-in module (40) coupled to the liquid treatment device (10), identifying the plug-in module (40) by the processing unit (32) of the liquid treatment device (10); In response to identifying the plug-in module (40), loading instructions for processing parameters from the memory unit (34) to the processing unit (32) of the liquid treatment device (10), wherein the loaded instructions depend on the type of plug-in module (40) connected; Determining parameters characterizing the liquid treatment process by means of a device for determining parameters of the liquid treatment device (10) based on the loaded instructions, and sending the parameters to a processing unit (32) of the liquid treatment device (10); Receiving parameters by a processing unit (32) of a liquid processing device (10); According to the instructions from the processing unit (32) of the liquid handling device (10), the parameters are sent to the plug-in module (40) via the plug-in module interface (36) and the liquid handling device interface (42); When receiving the parameters from the liquid treatment device (10), the parameters are processed using means for functional processing of the parameters of the insertion module (40).

27. The method according to claim 26, characterized in that Identifying the insertion module (40) comprises the following steps: sending an identification request from the liquid handling device (10) to the plug-in module (40) via the plug-in module interface (36) and the liquid handling device interface (42); and Receiving a response to the identification request from the plug-in module (40) via the plug-in module interface (36) and the liquid handling device interface (42), wherein the response to the identification request includes information about the type of the plug-in module (40).

28. The method according to any one of claims 26 to 27, characterized in that The first key is assigned to the plug-in module (40) and the second key is assigned to the liquid treatment device (10), wherein before sending the parameters to the plug-in module (40), the method comprises the following steps: Sending an authentication request from the liquid handling device (10) to the plug-in module (40) via the plug-in module interface (36) and the liquid handling device interface (42); receiving a response to the authentication request from the plug-in module (40) via the plug-in module interface (36) and the liquid handling device interface (42), wherein the response to the authentication request includes a signature of the plug-in module (40) encrypted using a first key; decrypting the signature from the plug-in module (40) using the second key by the processing unit (32) of the liquid processing device (10); Verifying the decrypted signature from the plug-in module with a list of authorized signatures, wherein the list of authorized signatures is stored in a memory unit (34) of the liquid handling device (10); Wherein the parameters are sent to the plug-in module (40) only if verification of the decrypted signature from the plug-in module (40) results in the plug-in module (40) being authenticated to receive the parameters.

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