WO2019072557A1

WO2019072557A1 - Domestic dishwasher

Info

Publication number: WO2019072557A1
Application number: PCT/EP2018/076071
Authority: WO
Inventors: Bernd Eisenbart; Michael Georg Rosenbauer; Michael Lugert; Karlheinz Rehm; Roland Rieger; Bernd Heisele
Original assignee: BSH Hausgeräte GmbH
Priority date: 2017-10-10
Filing date: 2018-09-26
Publication date: 2019-04-18
Also published as: DE102017217989A1; DE102017217989B4

Abstract

The invention relates to a domestic dishwasher (1) having a washing container (2); a circulation pump (17) for circulating washing liquor and/or fresh water during operation of the domestic dishwasher (1); an intensive washing zone (28) provided within the washing container (2), said intensive washing zone being able to be manually moved from a deactivated state, in which the intensive washing zone (28) is fluidically decoupled from the circulation pump (17), to an activated state, in which the intensive washing zone (28) is fluidically coupled to the circulation pump (17), and back from said activated state to said deactivated state; and a control device (18), which is configured to detect whether the intensive washing zone (28) is in the deactivated state or the activated state, and is configured to adapt a washing programme of the domestic dishwasher (1) according to the detected state of the intensive washing zone (28).

Description

Domestic dishwasher

The present invention relates to a household dishwasher.

A dishwasher has a washing container and washware receptacles arranged in the washing container for receiving items to be washed. The items to be washed can be subjected to cleaning of the same, for example with the aid of a rotatably mounted spray arm with rinsing water and / or fresh water. In addition, so-called intensive rinsing zones can be provided, which can be switched on in order, for example, to clean extremely heavily soiled items to be washed.

WO 2015/090433 A1 and US 2015/0250374 A1 each describe a dishwasher with such a switchable intensive rinsing zone. The WO

2014/071980 A1 discloses a method for detecting the switching position of an additional spraying device, which is based on a measurement of a pump current at different rotational speeds of the circulating pump.

Against this background, an object of the present invention is to provide an improved household dishwasher. Accordingly, a household dishwasher is proposed. The household dishwasher comprises a rinsing container, a circulating pump for circulating rinsing water and / or fresh water during operation of the domestic dishwasher, an intensive rinsing zone provided inside the rinsing container, which can be manually switched from a deactivated state in which the intensive rinsing zone is fluidically pumped by the circulating pump is decoupled, into an activated state in which the intensive scavenging zone is fluidically coupled to the circulation pump, and vice versa, and control means arranged to detect whether the intensive scavenging zone is in the deactivated state or in the activated state , and which is adapted to adapt a washing program of the domestic dishwasher depending on the detected state of the intensive rinsing zone. According to the invention, the control device is set up to adjust the wash program of the household dishwasher depending on the detected state of the intensive wash zone so that a pressure in a hydraulic circuit of the domestic dishwasher is changed when the intensive wash zone is activated compared to when the intensive wash zone is not activated. The controller may also change a water level of the domestic dishwasher in a rinse program depending on the state of the intensive rinse zone. A volume flow in the hydraulic circuit of the domestic dishwasher can also be changed by the control device depending on the state of the intensive rinsing zone. Alternatively or additionally, a temperature of the rinsing liquor and / or of the fresh water during the rinsing program or at least one activation time of an actuator, for example in the upper basket operation, can be changed by the control device as a function of the state of the intensive rinsing zone. Any of the aforementioned adjustments and modifications may be made individually or in any combination in any portion of the wash program, such as pre-wash, intermediate rinse, clean or rinse.

The switchable intensive rinsing zone thus allows the user to adapt the household dishwasher to the respective type and / or the degree of soiling of the dishes. There is no additional option to choose in the dishwasher of the household dishwasher, as the domestic dishwasher detects automatically whether the intensive rinse zone is activated or not.

The domestic dishwasher preferably comprises a hydraulic circuit, which may comprise the circulating pump, a feed tube, inlet pipes, spray arms and / or the intensive flushing zone. Several intensive rinsing zones can be provided. Preferably, the household dishwasher on several Spülgutaufnahmen, for example, an upper basket, a lower basket and a cutlery drawer on. Each Spülgutaufnahme can be assigned one or more intensive flushing zones. From the fact that the intensive flushing zone can be "manually" moved from the deactivated state to the activated state and vice versa, it is to be understood that the intensive flushing zone without additional electrical or electronic components, such as sensors, cables, solenoid valves or the like, directly from a user, for example by means of a rotary knob or lever, can be activated or deactivated. By way of example, in the case where the rinsing zone is "fluidically" coupled to the circulating pump, it is to be understood that a fluid connection, for example with the aid of a feed tube and an inlet tube, is realized between the intensive rinsing zone and the circulating pump Accordingly, there is no fluid connection between the intensive rinsing zone and the circulating pump in the fluidic decoupling The wash program may be modified such that, for example, the temperature in the wash container, hold times during the wash program, and / or a recirculation pump speed is modified stays the same or improves in the activated state.

According to one embodiment, the control device for detecting the state of the intensive flushing zone during operation of the domestic dishwasher detects a load condition of the circulation pump. For example, a current consumption of the circulation pump can be detected. This makes it possible to dispense with additional sensors.

According to a further embodiment, the control device adjusts a circulation pump speed of the circulation pump for adjusting the wash program.

By way of example, the control device can control the circulation pump in such a way that a conveyed quantity of rinsing liquor and / or fresh water is increased or reduced. For example, for this purpose, the circulation pump speed of the circulation pump can be increased or reduced. Thus, the concentricity of the circulation pump and the required pressure in the hydraulic circuit can be ensured during the entire rinsing process.

According to another embodiment, the controller increases the recirculation pump speed when the intensive purge zone is in the activated state. Accordingly, the controller may reduce the circulation pump speed when the intensive purge zone is in the deactivated state. According to a further embodiment, the intensive flushing zone has a manually operated valve, in particular a two-way valve.

The valve preferably has no electrical or electronic components. In particular, the valve is not a solenoid valve. The manually operated valve offers many advantages over an electrically controlled valve. The valve is particularly cost-effective, since it is in particular one piece executable and requires no electrical control and / or wiring. Since no electrical control is required, the valve is also fail-safe and robust. No additional feeder system is required. The valve and its multi-function is easily recognizable and understandable to the user.

According to a further embodiment, the valve is arranged within the washing container. This means that the valve can be mounted directly in the wet area at the corresponding intensive flushing zone. The function of the valve is thus easily recognizable to the user.

According to a further embodiment, the valve can only be actuated by an open door of the household dishwasher.

That is, in particular, the valve can not be actuated from outside the washing container.

According to a further embodiment, the valve is arranged on a Spülgutaufnahme the household dishwasher.

However, the valve can also be positioned anywhere within the washing container.

According to a further embodiment, the intensive rinsing zone has a spraying device. The spraying device can be mounted on a Spülgutaufnahme. The spray device can have a multiplicity of spray nozzles.

According to a further embodiment, the control device is set up to adapt the domestic dishwasher dishwashing program depending on the detected state of the intensive dishwashing zone so that a pressure in a hydraulic circuit of the domestic dishwasher in the deactivated state is at least one pressure in the hydraulic circuit in the activated one State corresponds.

In particular, a volume flow in the hydraulic circuit in the deactivated state also corresponds to at least one volume flow in the hydraulic circuit in the activated state. In addition, the temperatures during the wash program can be increased for an improved flushing performance. The activation times, for example, in the upper basket operation, can be increased. This also improves the flushing performance. Any of the foregoing modifications may be made in any portion of the wash program, such as pre-wash, intermediate rinse, clean or rinse.

Other possible implementations of the domestic dishwasher include not explicitly mentioned combinations of features described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the domestic dishwasher.

Further advantageous embodiments and aspects of the domestic dishwasher are the subject matter of the subclaims and the exemplary embodiments of the domestic dishwasher described below. Furthermore, the domestic dishwasher will be explained in more detail by means of preferred embodiments with reference to the attached figures. Fig. 1 shows a schematic perspective view of an embodiment of a domestic dishwasher; FIG. 2 shows a schematic sectional view of the domestic dishwasher according to FIG. 1; FIG.

3 shows a schematic view of an embodiment of a hydraulic circuit for the domestic dishwasher according to FIG. 1; and

FIG. 4 shows a further schematic view of the hydraulic circuit according to FIG. 3.

In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

1 shows a schematic perspective view of an embodiment of a household dishwasher 1. The household dishwasher 1 comprises a washing container 2, which is closed by a door 3, in particular waterproof. For this purpose, a sealing device can be provided between the door 3 and the washing container 2. The washing container 2 is preferably cuboid. The washing container 2 may be arranged in a housing of the household dishwasher 1. The washing container 2 and the door 3 can form a washing compartment 4 for washing dishes.

The door 3 is shown in Fig. 1 in its open position. By pivoting about a provided at a lower end of the door 3 pivot axis 5, the door 3 can be closed or opened. With the help of the door 3, a charging opening 6 of the washing container 2 can be closed or opened. The washing compartment 2 has a base 7, a ceiling 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3 and two side walls 10, 11 located opposite one another. The bottom 7, the ceiling 8, the rear wall 9 and the side walls 10, 1 1 can be made for example of a stainless steel sheet. Alternatively, for example, the bottom 7 may be made of a plastic material. The household dishwasher 1 further comprises at least one Spülgutaufnahme 12 to 14. Preferably, several, for example three, Spülgutaufnahmen 12 to 14 may be provided, wherein the Spülgutaufnahme 12 a lower Spülgutaufnahme or a lower basket, the Spülgutaufnahme 13 an upper Spülgutaufnahme or upper basket and the Spülgutaufnahme 14 may be a cutlery drawer. As FIG. 1 also shows, the items to be washed 12 to 14 are arranged one above the other in the washing container 2. Each Spülgutaufnahme 12 to 14 is either in the Spülbehälter 2 in or herausverlagerbar out of this. In particular, each Spülgutaufnahme 12 to 14 in a direction of insertion E in the washing 2 hineinschiebbar or into and against the insertion direction E in an extension direction A from the washing container. 2

retractable or removable.

FIG. 2 shows a schematic sectional view of the domestic dishwasher 1. The domestic dishwasher 1 comprises a hydraulic circuit 15. The hydraulic circuit 15 is a pump sump or sump 16 provided on the bottom 7 of the washing container 2 and a sump 16 mounted on the sump 16 Circulation pump 17 assigned. The circulating pump 17 is operatively connected to a control device 18 of the household dishwasher 1. By means of the control device 18, for example, a circulating pump speed of the circulating pump 17 can be set and / or regulated. The control device 18 can therefore also be referred to as a control and / or regulating device. The control device 18 is also suitable for load detection of the circulation pump 17. For example, the control device 18 detect a current consumption of the circulation pump 17. The control device 18 may have a computer, a sensor system and / or a control program for controlling the circulation pump 17.

The hydraulic circuit 15 further includes a supply pipe 19 which is in fluid communication with the circulation pump 17. The feed tube 19 may be guided along the bottom 7 and the rear wall 9 toward a roof gyro 20 mounted on the ceiling 8. With the help of the Dachkreiseis 20, for example, the Spülgutaufnahme 14 can be acted upon with rinse liquor and / or fresh water.

Below the Spülgutaufnahme 13 branches off a first inlet pipe 21 from the feed pipe 19. The first inlet pipe 21 leads to a spray arm 22 mounted rotatably on the washware receptacle 13. By means of the spray arm 22, for example, the washware receptacle 12 can be charged with wash liquor and / or fresh water. The first inlet pipe 21 is coupled to the feed pipe 19 by means of a separable coupling, so that the washware receptacle 13, together with the first inlet pipe 21, extends out of the washing container 2. and can be relocated into this again. Below the Spülgutaufnahme 12, that is, on the bottom 7, a further spray arm 22 may be provided, which is not shown in FIG.

Furthermore, the hydraulic circuit 15 has a second inlet pipe 23, which branches off from the feed pipe 19 below the washware receptacle 12. Also, the second inlet pipe 23 is separably coupled to the feed pipe 19. The second inlet pipe 23 may be mounted on the Spülgutaufnahme 12. The second inlet pipe 23 leads to a Spülgutaufnahme 12 associated spray 24, which may have a plurality of spray nozzles 25 to 27. With the aid of the spraying device 24, an intensive flushing zone 28 can be realized in or on the washware receptacle 12. With the help of Intensivspülzone 28 heavily soiled and / or difficult to clean dishes, such as bottles, can be cleaned very well.

Several spraying devices 24 may be provided so that such intensive flushing zones 28 can also be realized on the flushing receptacles 13, 14. For this purpose, such spraying devices 24 can also be provided on the washware receptacles 13, 14. Furthermore, spraying devices 24 of this type may also be provided at any point of the washing container 2, for example on the bottom 7, the ceiling 8, the rear wall 9 and / or the side walls 10, 11, in order to realize further intensive washing zones 28.

The intensive scavenging zone 28 or the spraying device 24 is assigned a valve 29 with which the inflow of washing liquor and / or fresh water to the spraying device 24 can be interrupted or released. For this purpose, the valve 29 can be provided on or in the second inlet pipe 23. In this case, the valve 29 may be mounted on the Spülgutaufnahme 12. In the event that, as previously mentioned, several Intensivspülzonen 28 are provided, several valves 29 are required. These valves 29 may be provided, for example, on or in the feed tube 19, the first inlet tube 21 or the like. For example, the roof gyro 20 and / or the spray arm 22 can thus be switched off and switched on, and thus each implement a further intensive flushing zone 28. The valve 29 is a manually operated valve disposed within the washing container 2. By "manually" actuating the valve 29, it is to be understood that a user directly actuates a valve body or a control element, such as a knob, coupled to the valve body, more particularly, the valve 29 does not include electronic components, such as an electromagnet The valve 29 may then be actuated by the user when the door 3 is open.

For example, if an active intensive purging zone 28 is desired, the user may open the valve 29 prior to beginning the purging operation and then, if the intensive purging zone 28 is not required, close the valve 29 prior to beginning the purging operation.

3 and 4 each schematically show switching states of the valve 29. In FIG. 3, the valve 29 is closed, so that the intensive scavenging zone 28 is deactivated, and in FIG. 4, the valve 29 is opened so that the intensive scavenging zone 28 is activated. In the deactivated state of the intensive rinsing zone 28, the entire pressure and the entire volume flow of the hydraulic circuit 15 are applied to the spray arm 22, for example. If the valve 29 is opened, the flushing capacity of the spray arm 22, without a readjustment of the circulation pump 17 is lower than when the intensive flushing zone 28 is deactivated. The circulating pump 17 can now be controlled so that even if the valve 29 is opened, the same pressure and the same volume flow is applied to the spray arm 22 as when the valve 29 is closed.

In particular, in the operation of the household dishwasher 1 at any time a concentricity of the circulation pump 17 and a sufficient spray pressure to the Dachkrei- was 20, the spray arm 22 and optionally the spray device 24 to ensure. By switching on the intensive scavenging zone 28, the hydraulic conditions in the hydraulic circuit 15 change. For example, the pressure of the rinsing liquor and / or of the fresh water may drop due to opening of the valve 29. This should be avoided. The control device 18 recognizes via the load detection, in particular by an increased total volume flow, for example via the current consumption, the circulation pump 17, whether the valve 29 is open or not. That is, the control device 18 detects the switching state of the valve 29. If the valve 29 is opened, the hydraulic circuit 15 to this state. For example, the control device 18 can control the circulation pump 17 in such a way that the conveyed quantity of rinsing liquor and / or fresh water is increased or reduced. For example, for this purpose, the circulation pump speed of the circulation pump 17 can be increased or reduced. Thus, the concentricity of the circulation pump 17 and the required pressure in the hydraulic circuit 15 can be ensured during the entire rinsing process.

The control device 18 thus automatically undertakes modifications to the selected wash program in order to generally maintain the wash performance and / or to specifically change, for example increase, the wash power in the corresponding area. Depending on the detection of the switching state of the valve 29, the corresponding program structure of the wash program is automatically adjusted to always ensure the best possible flushing performance.

A possible program modification of the wash program comprises an increase of the circulation pump speed in order to compensate for pressure losses due to the activated intensive wash zone 28. As a result, the pressure and the volume flow at the spray arm 22 can be maintained at 100% or approximately 100% even when the intensive purging zone 28 is activated. Furthermore, the circulation pump speed can also be increased in order to additionally achieve an increased flushing capacity when the intensive flushing zone 28 is activated. By way of example, this allows the pressure and the volume flow at the spray arm 22 to be increased to more than 100% in comparison to deactivated intensive scavenging zone 28. This increases the cleaning performance.

Furthermore, the water filling amount can be increased in order to achieve a secure concentricity of the circulation pump 17. This can be achieved by an increased total volume flow through the switched Intensivspülzone 28. In addition, the temperatures during the wash program can be increased for an improved flushing performance. The activation times, for example, in the upper basket operation, can be increased. This also improves the flushing performance. To reduce consumption, the circulation pump speed, the temperatures and / or the activation times can also be reduced. Any of the foregoing modifications may be made in any portion of the wash program, such as pre-wash, intermediate rinse, clean or rinse. The switchable Intensivspülzone 28 thus allows the user to adjust the household dishwasher 1 to the respective type and / or the degree of contamination of the dishes. There is no additional option to choose in the washing program of the household dishwasher 1, since the hydraulic circuit 15 and the household dishwasher 1 automatically detects whether the Intensivspülzone 28 is switched on or not.

The manually operated valve 29 has a number of advantages over an electrically controlled valve. The valve 29 is particularly cost-effective, since in particular it can be implemented in one piece and does not require electrical control and / or wiring. Since no electrical control is required, the valve 29 is also fail-safe and robust. The valve 29 can be mounted directly in the wet area, that is, in the rinse tank 2, at the corresponding Intensivspülzone 28. There is no additional supply system required. The valve 29 and its multi-function is easily recognizable and understandable to the user.

Although the present invention has been described with reference to embodiments, it is variously modifiable.

Used reference signs:

1 household dishwasher

2 rinse tanks

3 door

4 washroom

5 pivot axis

6 charging opening

7 soil

8 ceiling

9 rear wall

10 sidewall

1 1 side wall

12 Spülgutaufnahme

13 washware receptacle

14 Spülgutaufnahme

15 hydraulic circuit

16 pump pot

17 circulation pump

18 control device

19 feed tube

20 roof gyros

21 inlet pipe

22 spray arm

23 inlet pipe

24 spraying device

25 spray nozzle

26 spray nozzle

27 spray nozzle

28 intensive rinse zone

29 valve

A separation direction

E insertion direction

Claims

1 . Domestic dishwashing machine (1) with a rinsing container (2), a circulating pump (17) for circulating rinsing liquor and / or fresh water during operation of the household dishwasher (1), an intensive rinsing zone (28) provided inside the rinsing container (2) which is manually selectively switched from a deactivated state in which the intensive flushing zone (28) is fluidically decoupled from the circulation pump (17) to an activated state in which the intensive flushing zone (28) is fluidically coupled to the circulation pump (17), and vice versa and a controller (18) configured to detect whether the intensive purging zone (28) is in the deactivated state or in the activated state, and which is arranged depending on the detected state of the intensive purging zone (28) to adapt a washing program of the household dishwasher (1) such that

• a pressure in a hydraulic circuit (15) of the household dishwasher (1) is changed and / or

· An amount of water in the household dishwasher (1) has changed

and or

• a volume flow in the hydraulic circuit (15) of the household dishwasher (1) is changed and / or

• a temperature of the rinsing liquor and / or the fresh water is changed during the rinsing program and / or

• at least one activation time has been changed.

2. Household dishwasher according to claim 1, characterized in that the control device (18) for detecting the state of Intensivspülzone (28) during operation of the domestic dishwasher (1) detects a load condition of the circulating pump (17).

3. Household dishwasher according to claim 1 or 2, characterized in that the control device (18) for adjusting the wash program a Umpälzpum- pendrehzahl the circulating pump (17) changed.

4. Household dishwasher according to claim 3, characterized in that the control device (18) increases the circulation pump speed when the Intensivspülzone (28) is in the activated state.

5. Household dishwasher according to one of claims 1-4, characterized in that the Intensivspülzone (28) has a manually operated valve (29), in particular a two-way valve having.

6. domestic dishwasher according to claim 5, characterized in that the valve (29) within the washing container (2) is arranged.

7. Household dishwasher according to claim 5 or 6, characterized in that the valve (29) only by an open door (3) of the household dishwasher (1) can be actuated.

8. Domestic dishwashing machine according to one of claims 5 - 7, characterized in that the valve (29) is arranged on a Spülgutaufnahme (12 - 14) of the household dishwasher (1).

9. domestic dishwasher according to one of claims 1-8, characterized in that the Intensivspülzone (28) has a spraying device (24).

10. Household dishwasher according to one of claims 1-9, characterized in that the control device (18) is adapted to adjust depending on the detected state of Intensivspülzone (28), the washing program of the household dishwasher (1) that a pressure in a hydraulic circuit (15) of the domestic dishwasher (1) in the deactivated state corresponds to at least one pressure in the hydraulic circuit (15) in the activated state.