WO2016012152A1

WO2016012152A1 - Household appliance comprising a recirculating pump system

Info

Publication number: WO2016012152A1
Application number: PCT/EP2015/062944
Authority: WO
Inventors: Raymond Römer; Kevin Hahn
Original assignee: BSH Hausgeräte GmbH
Priority date: 2014-07-23
Filing date: 2015-06-10
Publication date: 2016-01-28
Also published as: DE102014214345B3; EP3172371A1; CN106536812A; PL3172371T3; EP3172371B1; CN106536812B; RU2653486C1

Abstract

The invention relates to a household appliance having a recirculating pump system which comprises a pump (101) for pumping water (103) in an outer tub (105) in a draining direction and a recirculating direction and further comprises a first valve gate (107-1) for sealing a bottom chamber (113) of the outer tube (105) in the recirculating direction, a second valve gate (107-2) for sealing a filter inlet orifice (109) in the draining direction, and a third valve gate (107-3) for sealing a discharge duct (111) in the recirculating direction.

Description

Household appliance with a pumping system

The present invention relates to a domestic appliance with a pumping system comprising a pump for pumping water in a tub in a pumping direction and a pumping direction.

Domestic appliances, such as washing machines usually comprise two separate pumps, which have a common housing and have two drives. For combined pump housings, two motors are flanged. There is no active detection and treatment of debris in the machine.

The document DE 38 20 409 A1 relates to a device for circulating washing or rinsing in a drum washing machine with built-in drum and with a trough under a drain opening of the tub sump arranged with a pump for emptying the liquor from the tub into a Pumping line is connected.

It is the object underlying the invention to provide a domestic appliance in which a pump is integrated so that it allows both a pumped and a pump-down operation from the home appliance out.

This object is achieved by the subject matter having the features of the independent claim. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.

According to one aspect of the invention, the object is achieved by a household appliance with a pumping system comprising a pump for pumping water in a tub in a pumping direction and a Umpumprichtung, wherein the pumping around a first valve flap for closing a bottom chamber of the tub in umpumprichtung, a second valve flap for closing a filter inlet opening in Abpumprichtung and a third valve flap for closing a drainage channel in Umpumprichtung comprises. As a result, for example, the technical advantage is achieved that a single pump can be operated in two pumping directions and simplifies the construction of the household appliance. In addition, the valve flaps realize a hydraulic valve flap control with pump-over and self-cleaning backwash function. A household appliance is a device that is used for household management. This can be a large household appliance, such as a washing machine, a tumble dryer or a dishwasher. But this can also be a small household appliance, such as a water heater, a coffee machine or a food processor.

In an advantageous embodiment of the household appliance, the pump comprises an axial or semi-axial pump impeller. As a result, the technical advantage is achieved, for example, that the water can be promoted efficiently in two opposite directions.

In a further advantageous embodiment of the household appliance, the pump is drivable in a first direction of rotation and a second direction of rotation. As a result, for example, the technical advantage is achieved that can change the direction of rotation of the water by changing the direction of rotation.

In a further advantageous embodiment of the household appliance, the filter inlet opening is arranged on an underside of the tub. As a result, for example, the technical advantage is achieved that an accumulation of foreign bodies in the lower region of the tub is prevented.

In a further advantageous embodiment of the household appliance, the third valve flap is arranged above the bottom chamber. As a result, for example, the technical advantage is achieved that a mixing of water in the lower region of the tub with filtered water in the lower region of the tub is prevented.

In a further advantageous embodiment of the household appliance, the household appliance comprises a filter unit for filtering the water in the Umpumprichtung. As a result, for example, the technical advantage is achieved that the water is purified during pumping.

In a further advantageous embodiment of the household appliance, the filter inlet opening is arranged in the bottom chamber. As a result, for example, the - - Technical advantage achieved that the water of the bottom chamber is pressed in the pumping operation through the filter unit.

In a further advantageous embodiment of the household appliance, an outlet of the pump is arranged in umpumprichtung in the bottom chamber. As a result, for example, the technical advantage is achieved that the water is pressed in Umpumbetrieb in the bottom chamber.

In a further advantageous embodiment of the household appliance, the household appliance comprises a Umpumpschlauch for redirecting the water to the tub. As a result, for example, the technical advantage is achieved that the water can be performed with simple means within the household appliance in a circle.

In a further advantageous embodiment of the household appliance, an outlet of the pumping tube is arranged on an upper side of the tub. As a result, for example, the technical advantage is achieved that laundry is well wetted within the tub by the filtered water.

In a further advantageous embodiment of the household appliance, the first valve flap is designed to open the bottom chamber of the tub in Abpumprichtung. As a result, for example, the technical advantage is achieved that a hydraulic valve flap control with pump-over and self-cleaning backwash function is achieved.

In a further advantageous embodiment of the household appliance, the second valve flap is designed to open the filter inlet opening in Umpumprichtung. As a result, the technical advantage is achieved, for example, that a hydraulic valve flap control with pump-over and self-cleaning backwash function is achieved.

In a further advantageous embodiment of the household appliance, the third valve flap is designed to open the drainage channel in Abpumprichtung. As a result, the technical advantage is achieved, for example, that a hydraulic valve flap control with pump-over and self-cleaning backwash function is achieved.

In a further advantageous embodiment of the household appliance, the tub includes a level sensor for detecting a water level. This will For example, the technical advantage achieved that hot running of the pump can be prevented.

In a further advantageous embodiment of the household appliance, the Abpumprichtung is opposite to the Umpumprichtung. As a result, for example, the technical advantage is achieved that an efficient hydraulic valve control is achieved.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

Fig. 1 is a schematic view of a household appliance; Fig. 2 is a schematic view of a pumping system during pumping; and

Fig. 3 is a schematic view of a pumping system when pumping.

Fig. 1 shows a schematic view of a washer dryer representative of a general household appliance 100. The household appliance 100 includes a door 125 for loading the household appliance 100 with laundry. The laundry is washed inside the household appliance 100 and then dried. The household appliance 100 comprises a pull-out dispenser tray 123 into which different liquid substances are added, which are supplied to the laundry by means of a water flow during the washing or drying process. The dispenser tray 123 is, for example, a pull-out drawer-like plastic part with a Einspülwanne.

Fig. 2 shows a schematic view of a pumping system with the valve flaps 107-1, 107-2, and 107-3 when pumping water 103 in a tub 105 in a Abpumprichtung. In the tub 105 is during the washing process, water or wash liquor 103 for cleaning the laundry.

The tub 105 comprises at the bottom of a bottom chamber 1 13, in which the water or the wash liquor 103 collects due to gravity. Above the - - Bodenkammer 1 13, the valve flap 107-3 is arranged. The valve flaps 107-1, 107-2 and 107-3 open or close depending on the flow direction of the water.

The valve flap 107-3 has a pivot point at its upper edge, so that the suction in the pumping operation from the tub 105 is made possible. In order to differentiate the different functions from one another, the valve flap 107-3 is spring-biased, so that it is closed in the pump-down cycle, the pump-down path is unlocked and the pump-down path is closed.

At the bottom of the bottom chamber 1 13 is a filter inlet opening 109 of a filter unit 1 17. The filter unit 1 17 is used to filter the water. The filtered water 103 is passed around the tub 105 through a pumping hose 1 19 and discharged to the laundry through an outlet at the top of the tub 105. Through a drain channel 1 1 1, the water 103 is derived from the tub 105.

A pump 101 and its drive are designed such that it can be operated in a pumping direction in a first direction of rotation and in a pumping direction in a second direction of rotation. A pump impeller 1 15 of the pump 101 is designed axially or semi-axially, so that by reversing the direction of rotation and a flow reversal is implemented. Due to the axial portion of the impeller geometry, these different flow directions can be made possible when reversing the direction of rotation. An outlet 121 of the pump 101 in Umpumprichtung located in the bottom chamber 1 13. In Abpumprichtung the water 103 is sucked through the outlet 121. In one flow direction, the water is pumped off, while in the other flow direction, the water is circulated in the circuit. The pumping system comprises three elastic valve flaps 107-1, 107-2 and 107-3, which open and close depending on the direction of rotation of the pump 101. In the discharge operation, the valve flap 107-1 opens and the valve caps 107-2 and 107-3 close.

Fig. 3 shows a schematic view of a pumping system when pumping water 103 in a tub 105 in a Umpumprichtung. The pumping of the wash liquor accelerates the wetting of the laundry at the beginning of a washing process and improves the washing performance in the washing machine. During the pumping operation, the valve flap 107-1 closes while the valve flaps 107-2 and 107-3 open. In umpumprichtung the water flows through the filter unit 1 17 are collected in the foreign body. After this foreign body trap, the water flows through the Umpumpschlauch 1 19 and is returned to the tub 105. The valve flap 107-3 is located below the water level, so that the pumping operation can also be ensured.

The circulation pumping function can be used not only when a pumping function is desired, but also to prophylactically clean the pumping system at regular intervals. Especially with pumping systems that are not accessible to a consumer, this cleaning and backwash function can be used to transport possible foreign objects into the filter unit 1 17 and to prevent blockages. As a result, a filtering out of foreign bodies or a release of blockages is realized. For the pumping system, only a single pump 101 is used. The other functions are made possible with the aid of elastic valve flaps 107-1, 107-2 and 107-3. The pumping system allows the saving of an additional drive motor with respect to a conventional pumping system while ensuring the two

different operating functions. Furthermore, a more compact design than conventional pumping systems is possible.

Additional benefits such as the existing feature for foreign body filtering and active foreign body troubleshooting are provided. The filter unit could be made available to the customer, or even made to allow storage of debris over the life of the device.

The pumping system combines various functional applications. On the one hand with the pump 101, the pumping and pumping is possible and on the other hand, a function is created to deal with foreign bodies and actively correct errors in the operation of the other two functions. The integration of the pump 101 can be carried out location-independent. These special functions make the pumping system particularly suitable for integrated pump systems in which there is no or only limited pump accessibility for the consumer, for example for removing blockages, for the pump 101. All the features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention in order to simultaneously realize their advantageous effects.

The scope of the present invention is given by the claims and is not limited by the features illustrated in the description or shown in the figures.

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LIST OF REFERENCE NUMBERS

100 home appliance

101 pump

103 water

105 tubs

107-1 Valve flap

107-2 Valve flap

107-3 Valve flap

109 Filter inlet opening

11 1 drainage channel

1 13 floor chamber

1 15 pump impeller

1 17 filter unit

1 19 Transfer hose

121 outlet

123 Einspülschale

125 appliance door

Claims

1 . A household appliance (100) comprising a pumping system comprising a pump (101) for pumping water (103) in a tub (105) in a pumping direction and a pumping direction, characterized in that the pumping system comprises a first valve flap (107-1) for Closing a bottom chamber (1 13) of the tub (105) in umpumprichtung, a second valve flap (107-2) for closing a filter inlet opening (109) in Abpumprichtung and a third valve flap (107-3) for closing a drain channel (1 1 1) in Umpumprichtung includes.

2. Household appliance (100) according to claim 1, characterized in that the pump (101) comprises an axial or semi-axial pump impeller (1 15).

3. Household appliance (100) according to one of the preceding claims, characterized in that the pump (101) is drivable in a first direction of rotation and a second direction of rotation.

4. Household appliance (100) according to one of the preceding claims, characterized in that the filter inlet opening (109) is arranged on an underside of the tub (105).

5. Household appliance (100) according to one of the preceding claims, characterized in that the third valve flap (107-3) above the bottom chamber (1 13) is arranged.

6. Household appliance (100) according to any one of the preceding claims, characterized in that the household appliance (100) comprises a filter unit (1 17) for filtering the water (103) in the Umpumprichtung.

7. Household appliance (100) according to one of the preceding claims, characterized in that the filter inlet opening (109) in the bottom chamber (1 13) is arranged.

8. Household appliance (100) according to one of the preceding claims, characterized in that an outlet (121) of the pump (101) is arranged in umpumprichtung in the bottom chamber (1 13).

9. Household appliance (100) according to any one of the preceding claims, characterized in that the household appliance (100) comprises a Umpumpschlauch (1 19) for diverting the water around the tub (105).

10. Household appliance (100) according to one of the preceding claims, characterized in that an outlet of the pumping tube (1 19) is arranged on an upper side of the tub (105).

1 1. Domestic appliance (100) according to one of the preceding claims, characterized in that the first valve flap (107-1) is designed to open the bottom chamber (1 13) of the tub (105) in Abpumprichtung.

12. Household appliance (100) according to any one of the preceding claims, characterized in that the second valve flap (107-2) is adapted to open the filter inlet opening (109) in Umpumprichtung.

13. Household appliance (100) according to any one of the preceding claims, characterized in that the third valve flap (107-3) is adapted to open the flow channel (1 1 1) in Abpumprichtung.

14. Household appliance (100) according to any one of the preceding claims, characterized in that the tub (105) comprises a level sensor for detecting a water level.

15. Household appliance (100) according to one of the preceding claims, characterized in that the Abpumprichtung is opposite to the Umpumprichtung.