EP3651630A1

EP3651630A1 - Household appliance having at least one movable door or panel

Info

Publication number: EP3651630A1
Application number: EP18731834.0A
Authority: EP
Inventors: Andreas Heidel; Sebastian Wagner; Bernd KRÄNZLE; Peter Jochimski; Markus Wecker
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2017-07-11
Filing date: 2018-06-15
Publication date: 2020-05-20
Anticipated expiration: 2038-06-15
Also published as: US11337581B2; PL3651630T3; DE102017211855A1; EP3651630B1; WO2019011585A1; US20200100642A1; CN110891468A

Abstract

The invention relates to a dishwasher, in particular a domestic dishwasher, having a washing compartment (2) to accommodate crockery, glasses, cutlery, or similar items for washing, said washing compartment (2) being capable of being closed by means of at least one door or panel (3) which is movable between an open and a closed position. A device (15) is provided which serves to detect whether the door or panel (3) is closed or open. The dishwasher is designed such that the door or panel (3) is associated with a two-stage or multi-stage securing means (18) for transition between the open and closed state, and the traversing of the double or multiple securing means (18) can be detected by the device (15).

Description

Household appliance with at least one movable door or flap

The present invention relates to a dishwasher, in particular a domestic dishwasher, with a washing container for receiving dishes, glasses, cutlery or similar items to be washed, said washing container is closed by at least one movable between an open and a closed position door or flap and wherein a device provided that is used to detect whether the door or flap is closed or open, according to the preamble of claim 1.

For the operation of a dishwasher, it is important to detect the so-called door status (open / closed) in order to obtain an electronically evaluable signal that can be evaluated by an electronic or operating software.

By means of such evaluable detection, it is possible that when opening the door, the hydraulic circuit can be interrupted immediately to avoid environmental damage caused by leaking water. Only when the door is closed, the hydraulic circuit of the dishwasher may be activated, as only so the desired cleaning and drying results can be achieved.

It is known to detect the door status of a Hall sensor which is installed in the door, and its counterpart, a magnet in a container frame of the body ^'. This can lead to the detection of a wrong door status, if the tolerance of door sensor and counterpart is not sufficient. For example, the operating software may then have a door open status, even though the door on the lock is noticeably locked and thus closed to the user, a wash program will not be started and the user will classify his dishwasher as defective Operating software of the dishwasher a door status "closed" are present, although the door is pressed during operation by an overpressure in the machine despite movement-inhibiting element (lock), the sensor due to its lack of tolerance but further detected a "closed" and signaled to the operating software. The fundamental problem with this and similar technical arrangements is that the real door status is defined via the movement-inhibiting element (lock) (lock engaged or not), the sensor technology which is relevant to the operating software of the dishwasher, but is decoupled from it. It is also known to detect an inclination of the door or flap, so that a difference between an example vertical closing position and an opposite angled open position. However, since the water inlet must stop very quickly at the door opening to avoid damage, the door status must be reliably detected in the immediate vicinity of the vertical closed position and may also be used in case of vibration of the dishwasher (for example, when working on the countertop or at the door ) do not provide any misinformation.

The invention is based on the problem of achieving an improvement here. The invention solves the problem by a household appliance having the features of claim 1. With regard to further advantageous embodiments and features of the invention, reference is made to the claims 2 to 9.

With the invention is characterized in that in a generic dishwasher the door or flap is associated with a two- or multi-level fuse to transition between the open and closed state and the device through the double or multiple backup is detected, ensures that a reliable filter is formed for the filtering of interference signals with respect to the Türöffs- or - closing. Simple shocks or multiple shocks that do not fit at a time interval are therefore no longer detected as a signal of door movement.

In particular, the passage through the two-stage or multi-stage fuse can be detected via at least one acceleration sensor with which the change in the orientation or the angular velocity ω can be detected. This falls on reaching a respective barrier of double or multiple backup, since there the door movement is slowed in each case to overcome the obstacle. Advantageously and at the same time inexpensive, the acceleration sensor in three axes can detect a relative orientation to the vector of gravitational acceleration. Also, a detection in addition to the change in angular velocity in three axes (gyroscope) is possible. Advantageously, the two- or multi-stage fuse is associated with a door or flap securable lock on a body of the dishwasher, so a unit that is directly responsible for the inhibition of movement of the door or flap.

Particularly advantageous is the passage through the two- or multi-level backup by a double or multiple peaks visible in an electronic evaluation. These peaks can thus form a characteristic pattern for the curve when opening or closing the door and thus clearly distinguish the recorded signal from other signals. This makes it possible that only after detection of the double or multiple peaks a signal to change the closing state of the door or flap is issued. This can, for example, cause an immediate stop of the program and stop the supply of water into the washing when the signal on opening. The two- or multi-level fuse can be conveniently ensured via a backdrop or multi-curved spring device on the lock.

Alternatively, the lock may comprise a wave profile for sliding a hook part. In any case, a two- or multi-stage design is favorable, which inhibits the free passage of an engaging part in the lock at two or more points, so as to obtain the desired double or multiple signal and transmit it to the operating software. Further advantages and features will become apparent from the drawing illustrated and described below embodiments of the subject invention.

In the drawing shows: 1 is a schematic perspective view obliquely from the front of an embodiment of a household appliance, here by way of example a dishwasher, with a front door here, Fig. 2 is a schematic side view of the dishwasher of Figure 1 with an opening door,

3 is a waveform of the angular velocity and the angular acceleration of the door, plotted against time,

Fig. 4 shows an exemplary two-stage spring clip as an engaging member in a lock.

The dishwashing machine 1 shown schematically in FIG. 1 is a household dishwasher. This has as part of a partially open to the outside or closed device body 5 a washing container 2 for receiving ware to be processed dishes, pots, cutlery, glasses, cooking utensils u. on. The items to be washed can, for example, be held in dish racks 1 1 and / or a cutlery drawer 10 and can be acted upon by so-called rinsing liquor. The rinsing liquor is fresh or, in particular, circulating water during operation with or without cleaning agent and / or rinse aid and / or desiccant. The rinsing container 2 may have an at least substantially rectangular outline with a front side V facing a user in the operating position. This front V can form a part of a kitchen front of kitchen furniture standing side by side or even be without reference to other furniture in a stand-alone device.

The washing container 2 can be closed by a door or flap 3, in particular on this front side V. This door 3 is shown in Figure 1 in partially open and then inclined to the vertical position. In its closed position, however, it stands upright and is according to the drawing to its opening about a lower horizontal axis forward and down in the direction of arrow 4 with an angular velocity ω swung open, so that it is at least almost horizontal in the fully open position. At its in the closed position, the user facing the outside and front V, the door 3 may be provided with a decorative plate 6, so as to experience a visual and / or haptic appreciation and / or adaptation to surrounding kitchen furniture.

The household appliance 1 is designed here as a stand-alone or as a so-called. Semi-integrated or as a fully integrated device. In the latter case, the device body 5 may also terminate substantially with the outer walls of the washing compartment 2. A surrounding this exterior housing can then be dispensed with. In the lower area of the dishwasher, a base 12 may be located for receiving in particular functional elements.

The movable door 3 is assigned in the embodiment according to the drawing in its upper part a transverse direction Q of the dishwasher extending control panel 8, which may include an accessible from the front V engagement opening 7 for manually opening and / or closing the door 3. In the transverse direction Q, the dishwasher often has an extension of 45, 50 or 60 centimeters. In the depth direction from the front V to the rear, the extension is often also at about 60 centimeters. The values are not mandatory.

The washing container 2 is circumferentially bounded by a total of closed door or flap 3 three fixed vertical walls 13 and two horizontal walls 13, one of which forms a ceiling (top) and another a bottom (bottom) of the washing compartment 2. The front side, the user and arranged here movable wall 14 forms a part of the movable door or flap 3.

For detecting the door ^status, a device 15 is provided, which determines via one or more sensor (s), whether the door or flap 3 is closed or open or is in the phase of closing or opening movement.

This device 15 may comprise one or more sensor (s), in particular acceleration sensor (s), via which the relative orientation of the door or Flap 3 can be determined. In particular, these are inclination / acceleration sensors.

Example "Opening the door":

When the door 3 is closed, the acceleration sensor is in a rest position, the integral inclination sensor reports, for example, a 90 ° angle (or an angle close to this value due to tolerances or slight inclination). If the door 3 is opened by the user, a jolt (change in acceleration) is produced during the opening by the movement-inhibiting element, in this case a double pressure, as explained in more detail below. This double pressure is sensed and interpreted as a "door open." This door status detection is supported by detecting the angular position of the door 3, which then has sufficiently far away from the 90 ° (or almost 90 °) position.

Example "Detecting the door":

When the door is closed, the angular position of the door 3 approaches a 90 ° angle. This angle measurement and the jerk (double or multiple pressure) when the door 3 engages in the lock 17 are to be interpreted as a clear signal for "door closed".

As can be seen in Figure 4, a two-stage or multi-stage fuse 18 is to be passed as a movement-inhibiting element to the transition between the opening and closing state in the door movement. From the device 15, the passage through the double or multiple fuse 18 can be detected. The door status is determined by sensing whether the movement-inhibiting element has been overcome or not. The counterpart for the sensor is thus the movement-inhibiting element itself - and not a decoupled other technical part of the dishwasher. The specific technical training can vary. By way of example, FIG. 4 shows a spring clip 16 as an engagement member in a lock 17, so that, for example, when the door 3 is opened, the lock 17 initially engages in a first depression as an obstruction 16a and subsequently in a second depression as an obstruction 16b of the spring clip 16. Also, a wave profile, a sawtooth or the like may be provided in the lock 17 for sliding an engaging member. The two- or multi-stage fuse 18 - here spring clip 16 and lock 17 with two resilient retaining fingers 17a - may be assigned to a door or flap 3 on a body 5 of the dishwasher 1 securable lock 17.

The passage through the two-stage or multi-level fuse 18 is visible in a electronic evaluation by means of a double or multiple peak 19, 20, whereby after detection of the double or multiple peaks 19, 20 a signal for changing the closing state of the door or flap 3 to the operating software is issued.

With such a solution, therefore, when opening the door or flap 3, there is a double or multiple obstruction 16a, 16b in the movement which, when overcoming, can detect and evaluate a double or multiple pressure.

Thus, the passage through the two- or multi-stage fuse 18 via at least one acceleration sensor of the device 15 can be detected. The acceleration sensor can detect a relative orientation to the vector of the gravitational acceleration g in three axes and thus at the same time indicate the orientation of the unit provided with the sensor, here the door 3. Thus, in the case of the door opening, first of all a vertical axis is parallel to the vector of gravitational acceleration, while at the end the door 3 is horizontal and therefore the axis offset by 90 ° lies parallel to the gravitational acceleration g.

FIG. 3 shows the curves of the angular velocity ω and the derivative dco / dt, ie the angular acceleration a, measured by the device 15 when the door 3 is opened. It is clear that when pulling on the door 3 in the opening direction on the time axis t between the markings tO and t1, the angular velocity initially increases until it remains constant between t1 and t2. The acceleration a is zero there. When the first obstruction 16a is reached at t2, the angular velocity first decreases, the acceleration a becomes negative in the first peak 19. After overcoming the obstruction at the point t4 on the time axis, the angular velocity increases again and then becomes constant at t5 until the second obstruction 16b at the point t6 on the time axis. There, the angular velocity between the markers t6 and t7 decreases again, the angular acceleration a becomes negative again in the second peak 20. Accordingly results In the curve, the passage through two negative areas, which represent the double pressure as a double peak 19, 20. From t8 the second obstruction 16b is overcome, from then on the angular velocity w can increase again until the door 3 continues to move continuously from the mark t9 on the time axis, before braking is initiated by the user shortly before reaching the full open position at t10 until t1 1 .

Different mechanical implementations of the double or multiple safety 18 are possible. For example, the two-or multi-stage fuse 18 can also be ensured via a link and / or a wave profile on the lock 17 for sliding a hook part.

If the door or flap 3 is opened during the program run, an immediate program stop and stop the water supply is performed in the washing container 2 when the signal is issued at opening. Conversely, when closing is detected, the program sequence is restarted.

The real door status, which is defined via the movement-inhibiting element, is no longer decoupled from the sensing. The absolute installation position of sensor and counterpart is thus not only less critical, but even completely irrelevant. It consists in the invention by, for example, absolutely no risk of Interruption Cycle (accidental abnormal termination due to a misrecognized door opening due to excess pressure in the washing tub during the washing ^cycle). This means that the process reliability of the dishwasher 1 and thus also the customer satisfaction (no false error messages) increase considerably.

LIST OF REFERENCE NUMBERS

1 home appliance,

2 washing containers,

3 door,

4 opening direction,

5 device bodies,

6 decorative plate,

7 recessed grip,

8 control panel,

10 cutlery drawer,

1 1 crockery basket,

12 sockets,

13 wall,

14 movable wall,

15 device for recording,

16 spring clips,

16a first obstruction,

16b second obstruction,

17 castle,

17a holding fingers,

18 two- or multi-level fuse,

19 peak,

20 peak,

Q transverse direction,

V Front of the dishwashing machine Gravitational acceleration

Claims

claims

Dishwasher (1), in particular domestic dishwasher, with a rinsing container (2) for holding dishes, glasses, cutlery or similar items, said rinse container (2) via at least one movable between an open and a closed position door or flap (3) closed and wherein means (15) are provided for detecting whether the door or flap (3) is closed or open,

characterized,

in that the door or flap (3) is associated with a two-stage or multi-level fuse (18) for the transition between the opening and closing states and the device (15) can detect the passage through the double or multiple fuse (18).

Dishwasher (1) according to claim 1,

characterized,

the passage through the two- or multi-stage fuse (18) can be detected via at least one acceleration sensor.

Dishwasher (1) according to claim 2,

characterized,

the acceleration sensor detects in three axes a relative orientation to the vector of the gravitational acceleration g.

Dishwasher (1) according to one of claims 1 to 3,

characterized,

that the two- or multi-stage fuse (18) one the door or flap (3) on a carcass

(5) the dishwasher (1) securable lock (17) is assigned.

Dishwasher (1) according to one of claims 1 to 4,

characterized, that the passage through the two- or multi-level fuse by a double or multiple peak (19,20) are visible in an electronic evaluation.

6. Dishwasher (1) according to claim 5,

characterized,

that a signal for changing the closing state of the door or flap (3) is output only after detection of the double or multiple peaks (19;

7. Dishwasher (1) according to claim 6,

characterized,

that when the signal is output at the time of opening, an immediate program stop and stop of the water supply to the washing container (2) are carried out.

8. Dishwasher (1) according to one of claims 2 to 7,

characterized,

that the two- or multi-stage fuse (18) is ensured via a gate on the lock (17).

9. Dishwasher (1) according to claim 8,

characterized,

in that the lock (17) comprises a wave profile for sliding off a hook part.