CN111077045A

CN111077045A - Measuring device for connection to a suction channel of a suction cleaning device

Info

Publication number: CN111077045A
Application number: CN201910976840.4A
Authority: CN
Inventors: R.奥特曼; G.伊森伯格; S.瑟特沃尔; S.默勒
Original assignee: Vorwerk and Co Interholding GmbH
Current assignee: Vorwerk and Co Interholding GmbH
Priority date: 2018-10-19
Filing date: 2019-10-15
Publication date: 2020-04-28
Also published as: DE102018126109A1

Abstract

The invention relates to a measuring device for connection to a suction channel of a suction cleaning device and/or to a suction channel of an accessory device for a suction cleaning device, having a housing and a sensor for detecting a parameter of an air flow flowing through the suction channel. In order to be able to use the measuring device independently of a specific suction cleaning appliance, it is proposed that the measuring device is designed as a mobile unit which is independent of the suction cleaning appliance and the accessory device, that the measuring device has a sampling channel with a sensor, a connection for connecting the measuring device to the suction channel of the suction cleaning appliance and/or to the suction channel of the accessory device, and a data processing device for at least partially processing the measurement data acquired by the sensor, and that the measuring device also has a local memory, a display device and/or a communication device for communicating with an external terminal device with respect to the measuring device, the suction cleaning appliance and the accessory device.

Description

Measuring device for connection to a suction channel of a suction cleaning device

Technical Field

The invention relates to a measuring device for connection to a suction channel of a suction cleaning device and/or to a suction channel of an accessory device for the suction cleaning device, wherein the measuring device has a housing and at least one sensor for detecting at least one parameter of an air flow flowing through the suction channel.

The invention further relates to a system comprising a suction cleaning device and a measuring device, wherein the suction cleaning device has a suction channel, and wherein the measuring device is designed to be connected to the suction channel and has a housing and at least one sensor for detecting a parameter of an air flow flowing through the suction channel.

Background

A plurality of possible embodiments of suction cleaning devices are known from the prior art.

In the domestic field, suction cleaning devices exist, for example, as vacuum cleaners or combined suction-mopping devices. A conventional suction cleaning device is provided, for example, with a suction channel which is in flow connection with the fan on the one hand and opens into the suction opening on the other hand. During operation of the suction cleaning device, the surface to be cleaned is subjected to a negative pressure via the suction opening, so that dirt and/or dust located on the surface can be conveyed through the suction channel in the direction of the suction chamber of the suction cleaning device.

In order to be able to adapt the individual adjustment of the suction cleaning device to the current ground properties, in particular the pollution situation, it is also known in the prior art to arrange a sensor in the suction channel of the suction cleaning device, which sensor measures one or more parameters of the air flow flowing through the suction channel. The measuring devices known in the prior art are installed in the suction cleaning device itself and are therefore part of the suction cleaning device.

DE 102008026884B 4, for example, discloses a cleaning appliance, in the intake channel of which a sensor is provided for generating a measurement signal which is dependent on the concentration and/or quantity of particles which are taken in, wherein the sensor is arranged between the intake opening and the aspirate collection container, and wherein an evaluation device is provided for generating at least one control signal which is dependent on the concentration and/or quantity of particles which are taken in.

Furthermore, it is known in the prior art to measure not only the particle concentration and/or the particle quantity sucked in, but also other parameters which can, for example, infer the necessity of a maintenance operation or a malfunction of the suction cleaning device. Here, for example, a measurement of the pressure in the intake channel or a measurement of the flow rate is included, which provides an indication of the clogging rate of the particle filter.

Disadvantageously, the known measuring devices are components of the suction cleaning device and therefore cannot be used for a plurality of suction cleaning devices, in order to be able to objectively compare the cleaning effect of a first suction cleaning device with the cleaning effect of a second suction cleaning device, for example.

Disclosure of Invention

Based on the prior art described above, the object of the present invention is therefore to provide a separate measuring device by means of which the parameters of different suction cleaning devices and/or accessory devices can be objectively compared.

In order to solve the above-mentioned problem, it is proposed that the measuring device is designed as a mobile unit which is independent of the suction cleaning device and the accessory device and has at least one sampling channel with at least one sensor, a connection for connecting the measuring device to the suction channel of the suction cleaning device and/or to the suction channel of the accessory device, and a data processing device for at least partially processing the measurement data acquired by the sensor, and that the measuring device also has a local memory, a display device and/or a communication device for communicating with an external terminal device which is external to the measuring device, the suction cleaning device and the accessory device.

In accordance with the invention, a separate measuring device is therefore provided, which can be fluidically connected to one or more suction cleaning devices and/or accessory devices in order to be able to measure a parameter of the suction air flow of the respective suction cleaning device. In contrast to the prior art, the measuring device is no longer part of the suction cleaning device or of the accessory device, but can be used separately and movably. The movable measuring device can preferably be connected to any vacuum cleaner/accessory device in order to be able to carry out comparative measurements, in particular to identify differences in cleaning performance, for example when suctioning a plurality of specific dirt types. The measuring device is provided with a connection to the suction cleaning device or the accessory device by means of one or more connections in order to produce a flow-technical connection between the suction channel of the suction cleaning device and the sampling channel of the measuring device. The connection can preferably be designed as a plug connection. Sensors arranged in and/or on the sampling channel of the measuring device are used to detect measured values relating to the sucked-in dust and/or air mixture. It can be provided that the movable measuring device can be connected to only one suction cleaning device at the same time. Alternatively, however, the measuring device can also be designed such that a plurality of suction cleaning devices can be connected to the measuring device at the same time. For this purpose, the measuring device may preferably be provided with two separate sampling channels with one or more sensors for detecting one or more parameters of the respective air flows within the sampling channels. In this case, the data processing device may, for example, provide separate measurement channels for the sensor of the first sampling channel and the sensor of the second sampling channel. Alternatively, however, a multiplexer can also be used between the sensors of the two sampling channels and the data processing device, said multiplexer selecting a measurement signal from the measurement signals of the plurality of sensors and switching it on to the data processing device, wherein the selected sensor signal changes, for example, periodically. It can also be provided that the movable measuring device has a plurality of connections for the suction cleaning device, but only a single sampling channel, to which the suction channels of the suction cleaning devices can be connected in succession in time. This embodiment also makes use of a selection circuit which selectively connects a certain suction channel of the suction cleaning device to the sampling channel, while the other suction channels, which are also connected to the measuring device, do not have a flow connection to the sampling channel. In this embodiment, there is the advantage that the number of sensors installed in the measuring device can be reduced and at the same time each measurement for each suction cleaning device is under the same conditions and therefore no differences are caused by the sensors.

The measuring device has, in addition to the local memory, a display device and/or a communication device for communicating with an external terminal device relative to the measuring device, the suction cleaning device and the accessory device. The display device of the measuring device may be, for example, a display, in particular a touch screen display, on which the result of the detection may be displayed to the user. The display can in particular enable an image display of the measurement data, in particular in the form of measurement curves, bar graphs or the like. The current measured value can also be displayed in association with the reference value, so that the user can directly recognize the difference in measurement. Furthermore, the display device can be configured to advise the user of changes to the suction cleaning device, for example the use of certain accessories, the need to clean or empty the particle filter or the suction chamber, or further maintenance needs. The proposed communication means can be a WLAN module or also a bluetooth module, which is used for communication with an external terminal device of the user. The external terminal device may preferably be a user's mobile terminal device, such as a mobile phone, tablet computer, laptop computer, etc., on which an application is installed, which is capable of processing and/or displaying data transmitted by the communication means. The external terminal can also be designed as a data processing device for assisting the measuring device. The external terminal device may also have an external memory for the measuring apparatus.

It is proposed that the measuring device has its own energy source, a power supply connection for connection to a house power supply device, and/or electrical contacts for connecting the measuring device to the power supply device of the suction cleaning appliance. If the measuring device has its own energy source and/or power supply connection, it can be operated as a stand-alone device, which can perform its function completely without being connected to further electrical equipment. The measuring device can thus be used fully automatically and ready for use. The measuring device can obtain energy for operating the sensors and the data processing device and, if necessary, further electrical loads via the energy source or the house energy supply. In the case of a measuring device which, alternatively or additionally, has electrical contacts for connection to a power supply device of the suction cleaning device, the measuring device can also be supplied with power by a corresponding power source of the suction cleaning device. According to this embodiment, the measuring device can be supplied with energy by means of a suction cleaning device. For example, rechargeable accumulators can be provided as the own energy source for the measuring device. The accumulator can be removed from the measuring device for repeated charging or can be charged via a charging device and a power connection integrated in the measuring device. An advantage of a battery-or battery-powered mobile measuring device is that it can be used independently of an external energy supply device, in particular in an environment in which a house energy supply device is just unavailable.

It is proposed that the sensor of the measuring device is an inductive sensor, a piezoelectric sensor, an optical sensor, an electrical sensor and/or a mechanical sensor. If the movable measuring device is provided with more than one sensor, different sensor types can be used, in particular, in order to be able to detect a plurality of parameters of the air flow. An inductive sensor within the sampling channel or in the region of the wall of the sampling channel is used to generate a detection signal which is related to the concentration and/or amount of the charged particles inhaled. The inductive sensor can be designed, for example, as a closed or non-closed annular sensor and at least partially surrounds the plane of the suction channel in the circumferential direction. The inductive sensor measures the inductive effect of the flowing charged particles through a plane defined by the annular shape. The charged particles create an electric field which, by induction, in turn causes charge redistribution on the electrodes of the sensor. The amount of charge induced is equal to the amount of charge annularly surrounded by the electrodes. In the case of two inductive sensors arranged one behind the other in the flow direction in the sampling channel, the flow velocity of the particles can be measured from the measured time difference and the known distance between the two inductive sensors. The rate of clogging of the particle filter connected downstream in the flow direction or the degree of filling of the aspirate space can be determined, for example. It is also possible to detect blockages in the suction channel of the suction cleaning device. In order to determine the flow velocity, the course of the intensity change of the detection signal at a first inductive sensor in the flow direction is compared with the course of the intensity change of the detection signal at a second inductive sensor following in the flow direction. In case a characteristic intensity change is identified again, the flow velocity of the charged particles can be determined from the measured time difference between the occurrence of this intensity change on the first sensor and the occurrence of the same intensity change on the second sensor and the local distance between the two inductive sensors.

The evaluation is carried out, preferably at least partially, by means of a data processing device of the measuring device, wherein the calculation can also take place on an external terminal or server which is connected in communication with the separate measuring device.

Alternatively or in combination with one or more inductive sensors, the movable measuring device can also have a piezoelectric sensor, which can likewise detect a signal that is dependent on the charge of the particles. Therefore, the amount of dust and/or the dust concentration can also be detected by the piezoelectric sensor. Furthermore, the flow velocity can also be detected in the case of using two or more piezoelectric sensors. The measuring device may also use an optical sensor, such as a camera, in order to measure the flow velocity or other parameters of the air or particles flowing through the suction channel. The camera is also understood here as an optical chip, for example a CCD chip or a CMOS chip. Furthermore, different types of electrical and/or mechanical sensors can be used to detect the parameter.

It is proposed that the data processing device of the measuring device is designed to determine the speed, the volume flow, the temperature, the humidity, the particle quantity and/or the particle type from the measurement data of the sensor. The data processing device can be designed to evaluate the signal of each sensor individually or to combine the sensor data of a plurality of sensors with one another in order, for example, to determine the flow rate or to compare a plurality of sensor signals with one another. Suitably, the measuring means is provided with a local memory in which the mathematical algorithm used by the data processing means is stored. Furthermore, reference values may also be stored in the local memory, which describe defined reference signals for, for example, a defined speed, volume flow, temperature, humidity, particle quantity and/or particle type. For example, reference signals characterizing "fine dust" and "coarse material" for different particle types can be stored, so that the data processing device can compare the measurement signals currently detected by means of the sensor with the stored reference signals and, if the two match, infer the particle type. The data processing device can also be configured to compare the signals of the first suction cleaning device and the signals of the second suction cleaning device with one another, wherein both suction cleaning devices can be connected to the movable measuring device at the same time, and both sets of signals can be evaluated, displayed and/or stored and/or compared in real time or alternatively also temporally successively with respect to the detected parameters.

In addition to the aforementioned measuring device, the invention also proposes a system consisting of a suction cleaning device and a measuring device, wherein the suction cleaning device has a suction channel and wherein the measuring device is designed for connection to the suction channel and has a housing and at least one sensor for detecting a parameter of an air flow flowing through the suction channel, wherein the measuring device is designed as a mobile unit which is independent of the suction cleaning device and has at least one sampling channel, which is provided with at least one sensor for connecting the measuring device to the suction channel of the suction cleaning device, a connection, which is provided with at least one sensor, and a data processing device for processing at least in part the measurement data acquired by the sensor, and wherein the measuring device further has a local memory, a display device and/or a communication device for communicating with an external terminal device that is external to the measuring device, the suction cleaning device and the accessory device. The system may in particular have a measuring device according to one of the preceding embodiments. The aforementioned advantages and features of the measuring device are thus also applicable to the system. The system may also comprise a movable measuring device and a plurality of suction cleaning devices, which can be connected to the measuring device one after the other or simultaneously in time. For this purpose, the measuring device can have two or more sampling channels, wherein a suction channel of a suction cleaning device can be connected to each sampling channel. In addition, however, the measuring device may also have only one sampling channel, wherein several suction channels, which are connected to the measuring device at the same time via connecting pieces, may be connected to the sampling channel one after the other. The measuring device can in particular provide different connections for different suction cleaning apparatuses or suction channels of a suction cleaning apparatus. The measuring device is particularly advantageously designed in such a way that the connecting element can be connected to the measuring device in a replaceable manner, so that the connecting element, like a replaceable adapter, can be adapted to the suction cleaning device to be connected.

It is proposed that the suction cleaning device has a base device and an accessory device which can be connected to the base device, wherein the measuring device has a connection for connecting the sampling channel to the suction channel of the base device and/or a connection for connecting the sampling channel to the suction channel of the accessory device. The basic device of a suction cleaning device is provided, for example, with a motor-fan unit, an energy source or power connection, an aspiration chamber and a particle filter. The accessory device is an accessory that can be connected to the base device, for example a suction nozzle with one or more cleaning elements, such as a bristle roller or the like. A connection region is formed between the base device and the accessory device, for example a plug connection having an end region for a suction channel of the base device and an end region for a suction channel of the accessory device. The connection region can be detached in order to connect the movable measuring device between the base device and the accessory device of the suction cleaning device. In this embodiment, the user can use the suction cleaning device as usual with the measuring device connected, while parameter measurements are carried out by means of the sensors of the measuring device. Alternatively, it is possible for a movable measuring device to be connected to the base device instead of the accessory device, or for the movable measuring device to be arranged on the suction opening of the accessory device. In the case of a floor cleaner with a base unit which runs in a rolling manner on the surface to be cleaned and a hand-held tube and/or hose connection to the suction nozzle, the measuring device can be arranged, for example, on the suction tube and/or suction hose and/or suction nozzle.

Furthermore, it is proposed that the connecting piece of the measuring device is associated with an end region of the sampling channel which is located on the front side and is designed to be connected to a corresponding end region of the suction channel of the suction cleaning device which is located on the front side. According to this embodiment, the sampling channel has two end regions on the end side, which can be connected to an end region of the suction channel of the base device or an end region of the suction channel of the accessory device. As already mentioned, a fixedly connected or variably exchangeable connection piece is provided for this purpose with the measuring device.

According to a further embodiment, it is proposed that the connection piece of the measuring device at least partially surrounds the sampling channel in the circumferential direction, wherein the connection piece, viewed in the longitudinal direction of the sampling channel, is C-shaped and is reversibly connectable from the radially outside to a suction channel of a suction cleaning device, such that the suction channel is enclosed by the sampling channel. According to this embodiment, the measuring device itself forms a connection piece for connection to the suction channel of the suction cleaning device. Thus, the measuring device is not arranged between the base device, for example a suction cleaning device, and the accessory device, but is, for example, clipped around a suction channel, for example a suction hose of the suction cleaning device. For this purpose, the measuring device can, for example, have a housing made of a flexible material, so that the C-shaped housing has an adjustable diameter and the measuring device can be arranged around the suction channel. The radially inwardly facing wall of the housing can in this case carry one or more sensors which can be placed in close proximity to the suction channel or inserted into the suction channel in order to detect a parameter of the air flow flowing through the suction channel there. Such a measuring device can also have its own energy source, power supply connections, electrical contacts for connection to the energy supply device of the suction cleaning appliance, sensors of various types, a local memory, a display device and/or a communication device for communication with an external terminal.

Finally, it can be provided in connection with the preceding embodiment that the suction channel of the suction cleaning device has radially directed gas openings, through which the sensor of the measuring device can be introduced into the suction channel. Preferably, the air holes are air holes that are normally present in suction cleaning devices per se, for example auxiliary air holes, which can be opened and/or closed when required. Such auxiliary air openings can be associated, for example, with a suction hose or a suction nozzle of the suction cleaning appliance. In the region of this air vent, the measuring device is arranged around the suction channel, so that the suction channel of the suction cleaning device is at the same time the sampling channel of the measuring device.

Drawings

The present invention is illustrated in detail below with reference to examples. In the drawings:

figure 1 shows a suction cleaning device with a measuring device according to the invention,

figure 2 shows an enlarged view of the measuring device according to the first embodiment,

figure 3 shows a measuring device according to a further embodiment,

fig. 4 shows a further suction cleaning device, with a measuring device according to a further embodiment,

figure 5 shows a cross-sectional view of the measuring device according to figure 4,

figure 6 shows a perspective view of the measuring device according to figure 4,

fig. 7 shows a measuring device according to a further embodiment.

Detailed Description

Fig. 1 shows a suction cleaning device 3, the suction cleaning device 3 being designed here as a handheld device having a base device 19 and an accessory device 20. The accessory device 20 is detachably arranged on the base device 19 in the connection region 26. The base device 19 has a handle 29, the handle 29 being designed, for example, to be telescopic, so that a user of the suction cleaning device 3 can adjust the length of the handle 29 according to his height. A handle 30 is also arranged on the lever 29, on which handle 30 a user can guide the suction cleaning device 3, i.e. move it over the surface to be cleaned, during normal operating operation. During the working operation, the user guides the suction cleaning device 3 over the surface to be cleaned, usually in mutually opposite directions of movement. The user alternately pushes and pulls the suction cleaning device 3. A switch 31 is also arranged on the handle 30, the switch 31 being used here to switch on and off a motor 32 driving a fan 33. The motor 32 and the fan 33 constitute, for example, a motor-fan unit of the suction cleaning device 3. The base device 19 is further provided with a suction chamber 34, the suction chamber 34 being used to receive dust and dirt during the working operation.

The accessory device 20 is designed, for example, in the manner of a suction nozzle 36, the suction nozzle 36 having a suction opening 27 and a cleaning element 37 assigned to the suction opening 27. The suction channel 2 extends from the suction opening 27 towards the connection region 26. The suction channel 2 of the accessory device 20 can be connected to the suction channel 2 of the base device 19 via a connection region 26. Furthermore, the accessory device 20 is provided with a plurality of wheels 28, which wheels 28 are used for rolling travel of the accessory device 20 on the surface to be cleaned. When the suction cleaning device 3 performs normal working operation, the suction opening 27 is subjected to a negative pressure by means of the motor-

fan units

32, 33. The suction located on the surface to be cleaned is fed first into the suction channel 2 of the accessory device 20 via the suction opening 27 and subsequently into the suction channel 2 of the base device 19 and into the suction chamber 34 via the connecting region 26. While only the filtered air continues to flow to the fan 33, the suction remains in the suction chamber 34. The cleaning elements 37 associated with the suction opening 27 are designed here, for example, in the form of a bristle roller which rotates about a substantially horizontal axis of rotation and which has a plurality of bristle elements. The cleaning element 37 can also be driven by a motor and during working operation scrapes the surface to be cleaned in order to separate dust and dirt from the surface to be cleaned.

In the connection region 26 of the base device 19 and the accessory device 20, there is a measuring device 1 according to the invention, which measuring device 1 is arranged in the flow direction of the air flow between the suction channel 2 of the accessory device 20 and the suction channel 2 of the base device 19. The measuring device 1 is a separate mobile unit which can optionally, for example, be connected as shown here between the accessory device 20 and the base device 19, so that the suction air fed into the suction channel 2 of the accessory device 20 and the base device 19 also flows through the measuring device 1. In this case, a parameter of the air flow can be detected by means of the measuring device 1. Alternatively, the measuring device 1 can also be designed such that the measuring device 1 is not mounted in the connection region 26 but is visible from the outside as a separate unit between the base device 19 and the accessory device 20.

Fig. 2 shows an enlarged view of a possible embodiment of the measuring device 1. An end region 23 of the base device 19 and an end region 24 of the accessory device 20 are connected to the measuring device 1. The measuring device is provided on its side with connecting

pieces

9, 10 for connection with an end region 23 of the base device 19 and an end region 24 of the accessory device 20. The connection may be a plug connection, a snap connection or the like. Between the

connections

9, 10 of the measuring device 1 there is a sampling channel 8. The sampling channel 8 has two end regions 21 and 22, respectively, which end regions 21 and 22 each communicate with one of the

connections

9 and 10. The suction channel 2 of the accessory device 20 and the suction channel 2 of the base device 19 thus transform in the region of the connecting

pieces

9, 10 into the sampling channel 8 of the measuring device 1. The sampling channel 8 is provided here with, for example, three

sensors

4, 5, 6. The

sensors

4, 5 are inductive sensors extending annularly around the sampling channel 8. Each

inductive sensor

4, 5 has a non-closed circular ring shape here and can be arranged inside the sampling channel 8, embedded in the wall of the sampling channel 8 or can also surround the sampling channel 8 from the outside as here. The two

sensors

4, 5, which are arranged in succession in the flow direction of the suction air flow, are used, for example, to detect the particle quantity, the particle concentration or the flow velocity of the air flow or of the charged particles present in the air flow. Alternatively, two piezoelectric sensors arranged one behind the other can also be used to detect the flow velocity.

The charged particles present in the aspirated aspirant also enter the plane of the electrically conductive detection region of the

sensor

4 or 5 in the sampling channel 8 of the measuring device 1, which is perpendicular to the main flow direction of the aspirating air flow. The electric field of the charged particles induces, by induction, a charge movement on the electrically conductive detection area of the

sensor

4, 5, wherein the charge movement is comparable to the charge of the particles flowing past the detection area. The charge movement causes a current which can be evaluated by the data processing device 11 associated with the

sensor

4, 5. The data processing means 11 determine the concentration and/or magnitude and/or flow velocity of the charged particles located in the sampling channel 8 from the detected current intensity. This can be inferred at the same time, for example, as to the degree of soiling of the surface currently being driven over by the suction cleaning device 3, the degree of filling of the particle filter of the base device 19 and/or the suction chamber 34, etc. The further sensor 6 is designed here, for example, as a humidity sensor. However, different or additional sensors, in particular temperature sensors, pressure sensors or cameras, may alternatively be used in the sampling channel 8. These sensors may help to detect the particle type, particle size, particle amount, particle concentration or particle velocity or volume flow of particles within the sampling channel 8. All

sensors

4, 5, 6 are here provided in common with a data processing device 11, and the data processing device 11 is provided to process the measurement data of the

sensors

4, 5, 6 at least in part and, if necessary, to combine the measurement data of the

sensors

4, 5, 6 with one another.

Also arranged in the housing 7 of the measuring device 1 are an energy source 12, a memory 15 and a wireless communication device 17. The energy source 12 is here a rechargeable accumulator. The communication device 17 may be, for example, a wireless radio module, such as a WLAN module or a bluetooth module. The measuring device 1 can communicate with an external terminal device 18 (see, for example, fig. 3) by means of a communication device 17 in order to receive control commands, transmit information, etc. The memory 15 is a data memory associated with the data processing device 11, which on the one hand serves to store the measurement signals detected by the

sensors

4, 5, 6 and on the other hand may also contain reference signals, which the data processing device 11 can retrieve during data processing. For example, the memory 15 may have reference signals for a determined particle type, particle size, particle quantity, temperature or humidity of the particles present in the sampling channel 8. The measurement signals detected by the

sensors

4, 5, 6 can therefore be compared with stored reference signals in order to be able to deduce a certain value of a parameter of the air flow if the two coincide. For example, the

inductive sensors

4, 5 may measure a current induced by the flowing charged particles over a defined period of time. Such a time-dependent signal is compared by means of the data processing device 11 with an amplitude-time diagram stored in the memory 15, which is characteristic for different particle types and/or particle quantities, for example. The comparison may in particular relate to a comparison of the signal amplitude and/or the peak width and/or the slope of the signal maximum. The data processing device 11 can be designed to compare the currently measured sensor data with reference data stored in the memory 15 in real time. Alternatively, however, the sensor data can also be stored first in the memory 15 and compared with the reference data by the data processing device 11 with a time delay. As a result of the comparison, the data processing device 11 can output, for example, the particle velocity, the filter filling degree, the aspirate cavity filling degree, the particle quantity, the particle type, the temperature and/or the humidity within the sampling channel 8.

Fig. 3 shows a further possible embodiment of a measuring device 1 according to the invention, which measuring device 1 also has two connecting

pieces

9, 10 for connecting an accessory device 20 and a base device 19 of the suction cleaning device 3. Alternatively, the measuring device 1 can also be connected only to the base unit 19, so that the measuring device 1 is not arranged between two units but forms the end-side measuring device 1. In this case, the air is drawn directly into the measuring device 1, rather than, for example, first through the accessory equipment 20. The embodiment according to fig. 3 is suitable for mounting between an accessory device 20 and a base device 19 as shown in fig. 1. For this purpose, the measuring device 1 is provided with electrical contacts 14 on the connecting

pieces

9, 10, said electrical contacts 14 being intended to be connected with corresponding electrical contacts (not shown) of the base device 19 and the accessory device 20. According to this embodiment, the mobile measuring device 1 does not need to have its own energy source 12, since the electrical load of the measuring device 1 is supplied only by the base device 19 of the suction cleaning device 3 or, if appropriate, also by the accessory device 20. Furthermore, the accessory device 20 can also be supplied with energy via the measuring device 1 via the electrical contacts 14 of the measuring device 1. Fig. 3 also shows, by way of example, the communication of the communication device 17 of the measuring device 1 with an external terminal device 18 of the user. The external terminal 18 is here, for example, a mobile telephone, but it can also be a different mobile terminal 18, for example a tablet computer, a laptop computer, etc. Further, the communication device 17 may communicate with a personal computer, a server, or other electronic equipment having an appropriate communication device. As already shown in fig. 2, the measuring device 1 can be provided with a plurality of

sensors

4, 5, 6. A data processing device 11 can also be provided, which data processing device 11 at least partially processes the measurement data detected by the

sensors

4, 5, 6. However, the data processing device 11 can also transmit the measurement data via the communication device 17 to an external terminal 18, which external terminal 18 subsequently processes the data by means of an application installed thereon and displays the measurement results to the user.

Fig. 4 to 6 show further possible embodiments of the measuring device 1 according to the invention. Instead of being connected between the base device 19 and the attachment device 20 or on the end face of the suction channel 2 of the suction cleaning device 3, as shown in fig. 1 to 3, the measuring device 1 is provided on the outside on, for example, a suction hose 35 or a handle 30 through which the suction channel 2 is guided. The measuring device 1 has the form of a C-shaped clamp which can circumferentially surround the suction channel 2. According to the exemplary embodiment shown in fig. 4, the suction cleaning device 3 is a floor cleaner with a base device 19 which rolls over the surface to be cleaned, the base device 19 being connected to a suction hose 35, the suction hose 35 transitioning into the handle 30 and ultimately into a suction nozzle 36, the suction nozzle 36 being designed as an accessory device 20. The handle 30 here has, for example, an air opening 25, which air opening 25 serves as an auxiliary air opening during the operating operation of the suction cleaning device 3.

As shown in detail in fig. 5 and 6, the measuring device 1 has a plurality of

sensors

4, 5, 6, wherein the sensor 6 can be inserted into the intake channel 2 through the air opening 25. The section of the intake channel 2 enclosed by the housing 7 of the measuring device 1 simultaneously forms a sampling channel 8 of the measuring device 1. The sensor 6 may be, for example, a temperature sensor, a humidity sensor or a camera. The

sensors

4, 5 are embedded in the material of the measuring device 1 in the circumferential direction of the measuring device 1. The

sensors

4, 5 are inductive sensors which surround the sampling channel 8 over the angular region of the C-shape and are therefore able to detect charged particles flowing through the measuring device 1. The housing 7 of the measuring device 1 can be designed to be elastic at least in the region of the end-

side connecting pieces

9, 10, so that the measuring device 1 can be easily mounted on the handle 30 of the suction cleaning device 3 by deformation of the connecting

pieces

9, 10. Furthermore, at least one of the connecting

elements

9, 10 can also be designed to be rotatable, so that the measuring device 1 can be guided on the handle 30.

Furthermore, the annular measuring device 1 can also have a data processing device 11, a memory 15, an energy source 12 and/or a communication device 17, as described above with respect to the measuring device 1 according to fig. 1 to 3. The

sensors

4, 5, 6 can be, in addition to inductive sensors and cameras, piezoelectric sensors, various optical sensors, electrical sensors and/or mechanical sensors. The data processing device 11 can be designed to determine the particle velocity, the particle volume flow, the particle quantity, the particle concentration, the particle distribution, the particle type and/or the temperature or humidity from the measurement data of the

sensors

4, 5, 6.

Finally, fig. 7 shows a possible further embodiment of the measuring device 1. The measuring device 1 is designed to be connected simultaneously to two suction channels 2 of, for example, two different suction cleaning apparatuses 3. For this purpose, the measuring device 1 has two connecting pieces 9. Several suction channels 2 can be connected to one of the two sampling channels 8 of the measuring device 1 by means of the connecting pieces 9. Each sampling channel 8 is provided with its

own sensor

4, 5, which

sensors

4, 5 are designed and arranged identically to each other in order to provide similar measurement conditions for the two sampling channels 8. The

sensors

4, 5 are in this case two inductive sensors arranged one behind the other in the flow direction of the sampling channel 8. The

sensors

4, 5 are connected to a data processing device 11, so that the measurement data acquired by all the

sensors

4, 5 can be evaluated. The measuring device 1 has a local energy source (for example, an accumulator) and a power supply connection 13 for connection to a house energy supply. Furthermore, the measuring device 1 has a display device 16 in the form of a display, on which the measurement signals of the two measurement channels corresponding to the two sampling channels 8 are displayed. The display device 16 here shows, for example, two amplitude/time diagrams. Suggestions and instructions can likewise be output to the user of the suction cleaning device 3 on the display device 16. If necessary, the display device 16 may also have an input device, for example in the form of a touch-sensitive touch screen. This allows the user to confirm the input, make a selection, and the like. On the side of the sampling channel 8 facing away from the suction channel 2, the measuring device 1 can optionally be disconnected or open into a suction nozzle, connected to a hose or the like. The measuring device 1 is used in particular for comparing the measurement signals of two identical or different suction cleaning devices 3. For this purpose, two suction cleaning devices 3 can be connected to the measuring device 1 at the same time. The suction cleaning device 3 is operated, for example, in the normal operating mode and sucks in air and suction material via the sampling channel 8 of the measuring apparatus 1. One or more parameters of the respective air flow of the suction cleaning device 3 can be detected by means of the

sensors

4, 5 arranged in the respective sampling channel 8 and evaluated by means of the data processing device 11. For example, the flow speed of the charged particles can be detected in each sampling channel 8, so that the current suction power of the suction cleaning device 3 can be inferred.

List of reference numerals

1 measuring device

2 suction channel

3 suction cleaning device

4 sensor

5 sensor

6 sensor

7 casing

8 sampling channel

9 connecting piece

10 connecting piece

11 data processing device

12 energy source

13 power supply connector

14 electrical contact

15 memory

16 display device

17 communication device

18 terminal device

19 basic equipment

20 accessory device

21 end region

22 end region

23 end region

24 end region

25 air hole

26 connecting region

27 suction opening

28 wheel

29 handle bar

30 handle

31 switch

32 motor

33 Fan

34 suction object cavity

35 suction hose

36 suction nozzle

37 cleaning element

Claims

1. Measuring device (1) for connection with a suction channel (2) of a suction cleaning apparatus (3) and/or with a suction channel (2) of an accessory apparatus (20) for the suction cleaning apparatus, wherein the measuring device (1) has a housing (7) and at least one sensor (4, 5, 6) for detecting at least one parameter of an air flow flowing through the suction channel (2), characterized in that the measuring device (1) is designed as a movable unit which is independent of the suction cleaning apparatus (3) and the accessory apparatus (20), and the measuring device (1) has at least one sampling channel (8) which is provided with at least one sensor (4, 5, 6), a connection (9, 10) for connecting the measuring device (1) with the suction channel (2) and/or with the accessory apparatus (3), and a data processing device (11) The suction channel (2) of the piece of equipment (20) is connected, the data processing device is used for at least partially processing the measurement data collected by the sensors (4, 5, 6), and the measurement device (1) is also provided with a local memory (15), a display device (16) and/or a communication device (17) which is used for communicating with an external terminal device (18) relative to the measurement device (1), the suction cleaning equipment (3) and the accessory equipment (20).

2. Measuring device (1) according to claim 1, characterized in that the measuring device (1) has its own energy source (12), a power connection (13) for connection with a house power supply and/or an electrical contact (14) for connecting the measuring device (1) with a power supply of a suction cleaning apparatus (3).

3. The measuring device (1) according to claim 1 or 2, characterized in that the sensor (4, 5, 6) is an inductive sensor, a piezoelectric sensor, an optical sensor, an electrical sensor and/or a mechanical sensor.

4. Measuring device (1) according to one of the preceding claims, characterized in that the data processing device (11) is provided to determine the speed, the volume flow, the temperature, the humidity, the particle quantity and/or the particle type from the measurement data of the sensors (4, 5, 6).

5. A system consisting of a suction cleaning device (3) and a measuring apparatus (1), wherein the suction cleaning device (3) has a suction channel (2), and wherein the measuring apparatus (1) is designed for connection with the suction channel (2), and the measuring apparatus (1) has a housing (7) and at least one sensor (4, 5, 6) for detecting a parameter of an air flow flowing through the suction channel (2), characterized in that the measuring apparatus (1) is designed as a movable unit which is independent of the suction cleaning device (3), and the measuring apparatus (1) has at least one sampling channel (8) which is provided with at least one sensor (4, 5, 6), a connection (9, 10) for connecting the measuring apparatus (1) with the suction channel (2) of the suction cleaning device (3) and a data processing device (11), the data processing device is used for at least partially processing the measurement data collected by the sensors (4, 5, 6), wherein the measurement device (1) is also provided with a local memory (15), a display device (16) and/or a communication device (17) which is used for communicating with an external terminal device (18) relative to the measurement device (1), the suction cleaning equipment (3) and the accessory equipment (20).

6. System according to claim 5, characterized in that the suction cleaning device (3) has a base device (19) and an accessory device (20) which can be connected to the base device (19), wherein the measuring apparatus (1) has a connection (9, 10) for connecting the sampling channel (8) to the suction channel (2) of the base device (19) and/or a connection (9, 10) for connecting the sampling channel (8) to the suction channel (2) of the accessory device (20).

7. The system according to claim 5 or 6, characterized in that the connecting pieces (9, 10) of the measuring device (1) are assigned to end regions (21, 22) of the sampling channel (8) which are located at the end and are designed to be connected to corresponding end regions (23, 24) of the suction channel (2) of the suction cleaning device (3) which are located at the end.

8. System according to claim 5 or 6, characterized in that the connection (9, 10) of the measuring device (1) at least partially surrounds the sampling channel (8) in the circumferential direction, wherein the connection (9, 10) is configured C-shaped as seen in the longitudinal direction of the sampling channel (8) and is reversibly connectable from the radially outside with the suction channel (2) of a suction cleaning apparatus such that the sampling channel (8) encloses the suction channel (2).

9. The system according to claim 8, characterized in that the suction channel (2) of the suction cleaning device (3) has radially directed air holes (25), through which air holes (25) the sensors (4, 5, 6) of the measuring device (1) can be introduced into the suction channel (2).