CN108699756B - Laundry care appliance with pump and method - Google Patents
Laundry care appliance with pump and method Download PDFInfo
- Publication number
- CN108699756B CN108699756B CN201780014001.3A CN201780014001A CN108699756B CN 108699756 B CN108699756 B CN 108699756B CN 201780014001 A CN201780014001 A CN 201780014001A CN 108699756 B CN108699756 B CN 108699756B
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- Prior art keywords
- pump
- pressure chamber
- pumping
- out pressure
- washing liquid
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/10—Filtering arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
- D06F39/085—Arrangements or adaptations of pumps
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Abstract
The invention relates to a laundry care appliance (100) having a pump (105) for pumping washing liquid, the pump (105) comprising a suction chamber (107) having a suction connection (109) for fluidically connecting to the suction line, the pump (105) comprising a circulation pumping pressure chamber (115) having a circulation pumping pressure connection (117) for fluidically connecting to the circulation pumping line, the pump (105) comprising a pumping pressure chamber (111) having a pumping pressure connection (113) for fluidically connecting to the pumping line, the pumping pressure chamber (111) and the suction chamber (107) being fluidically connected. The pump-out pressure chamber (111) and the circulating pumping pressure chamber (115) are fluidically connected, and the pump (105) comprises a filter element received in the pump-out pressure chamber (111) and configured to filter out impurities from the washing liquid in order to prevent the impurities from being transported from the pump-out pressure chamber (111) into the circulating pumping pressure chamber (115).
Description
Technical Field
The invention relates to a laundry care appliance having a pump.
Background
For large loads, conventional laundry care appliances have a circulating pumping system, by means of which the washing liquid can be pumped out of the lye container and then returned to the lye container. In addition, conventional laundry care appliances also have a pump-out system in order to remove the washing liquor from the laundry care appliance after the laundry care process. Pumps are required for the circulation pumping system and the pump-out system in order to ensure an effective circulation pumping of the washing liquid in the laundry care appliance or an effective pumping of the washing liquid out of the laundry care appliance.
Since there are a large number of impurities (e.g. foreign bodies, hair or fluff) in the washing liquid which are pumped by the pump, filter elements (or foreign body traps) are used in conventional laundry care appliances for filtering out impurities from the washing liquid.
In document US 3727435 a, a domestic washing machine is disclosed with a self-cleaning lint filter arranged between a water container and two reversible pumps.
In document EP 2772582 a1, a washing machine is disclosed, which comprises a housing, a basin, a pump housing and a pump filter, wherein the pump filter is capable of filtering out foreign bodies from the washing water and of detaching them from the pump housing.
In document WO 2011/147009 a2, a self-cleaning filter for a washing machine is disclosed, which traps lint and residues of the laundry when the washing water is pumped in circulation, and which self-cleans the laundry when the washing water is drained, because the lint and residues are pumped out.
In document US 6167733B 1 a drum washing machine with a pump integrated with a filter for removing impurities from the washing liquid is disclosed.
In document EP 2479336 a1 a washing machine is disclosed having a washing tub, a pump housing and a filter, wherein the filter reduces the accumulation and growth of foreign matter during the effective filtering of foreign matter out of the washing water.
Disclosure of Invention
The object of the present invention is to provide a laundry care appliance having a pump which allows washing liquid to be pumped efficiently in the laundry care appliance.
This object is achieved by the subject matter having the features according to the independent claims. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.
According to a first aspect of the invention, this object is achieved by a laundry care appliance having a pump for pumping washing liquor, wherein the pump comprises a suction chamber having a suction connection for fluidic connection to a suction line, wherein the pump comprises a circulation pumping pressure chamber having a circulation pumping pressure connection for fluidic connection to a circulation pumping line, wherein the pump comprises a pumping-out pressure chamber having a pumping-out pressure connection for fluidic connection to a pumping-out line, wherein the pumping-out pressure chamber and the suction chamber are fluidically connected, wherein the pumping-out pressure chamber and the circulation pumping pressure chamber are fluidically connected, wherein the pump comprises a filter element which is received in the pumping-out pressure chamber, and, wherein the filter element is configured to: the impurities are filtered out of the scrubbing liquid to prevent the impurities from being transported from the pump-out pressure chamber to the circulating pump-out pressure chamber.
This achieves the technical advantage that: the circulating pumping pressure chamber is fluidically connected to the suction chamber only via the pump-out pressure chamber, as a result of which impurities entrained in the washing liquid are retained in the filter element of the pump-out pressure chamber and are thus prevented from being transported into the circulating pumping pressure chamber.
In conventional laundry care appliances having a circulation pumping system and a pump-out system, the pump-out pressure chamber and the circulation pumping pressure chamber are each connected in a fluidic manner independently (in particular separately and autonomously) to the suction chamber. Depending on the pump conditions, the washing lye can thus either be conveyed through the pump-out pressure chamber into the pump-out line or through the circulating pump-out pressure chamber into the circulating pump-out line. Pre-filtration is achieved by the serial connection of these chambers. However, with the pump-out pressure chamber and the recirculating pump-out pressure chamber thus fluidically connected to the suction chamber, there is the risk that: impurities can accumulate on the fluid connection between the suction chamber and the recirculating pumping pressure chamber and can clog this fluid connection. Due to the parallel flow relationship in the pump to some extent
Impurities that may collect on the connection may no longer be able to collectIs removed during pumping through the pump-out pressure chamber into the pump-out line. This may result in a customer service investment (kundertienstein natz) to remove the accumulated impurities from the pump.
In the pump according to the invention, the amount of impurities (for example foreign bodies and/or accumulations of hair or fluff) that accumulate on the fluidic connection between the pump-out pressure chamber and the circulating pumping pressure chamber is reduced. This achieves that: the circulating pumping pressure chamber, the pump-out pressure chamber and the suction chamber are connected in series, so that the circulating pumping pressure chamber is not connected fluidically directly, but rather via the pump-out pressure chamber to the suction chamber. Thus, a large portion of the impurities remains in the suction chamber. A portion of the impurities is conveyed from the suction chamber into the pump-out pressure chamber, filtered there by the filter element and left in the pump-out pressure chamber without being conveyed into the circulating pump-out pressure chamber. During the subsequent pumping-out operation, which is connected in terms of time, impurities remaining in the pumping-out pressure chamber can be removed from the pump system. This prevents the fluidic connection between the pump-out pressure chamber and the circulating pump-up pressure chamber from becoming blocked due to the accumulation of foreign matter.
By a laundry care appliance is understood an appliance for laundry care, for example a washing machine or a laundry dryer. Such a laundry care appliance is understood to mean, in particular, a household laundry care appliance. Namely a laundry care appliance which is used in the household sector and with which laundry of the household usual quantity is treated.
In an advantageous embodiment of the laundry care appliance, the pump comprises a further filter element which is received in the suction chamber, wherein the further filter element is configured for: impurities are filtered out of the washing liquid in order to prevent the transport of impurities from the suction chamber into the pump-out pressure chamber.
This achieves the technical advantage that: a particularly effective filtering out of impurities from the washing liquid is achieved by means of a further filter element received in the suction chamber. Thereby, the amount of impurities transported from the suction chamber into the pump-out pressure chamber can be reduced. In combination with the filter element in the pump-out pressure chamber, a particularly effective reduction of impurities in the circulating pump pressure chamber can thereby be achieved. The further filter element can be designed in particular for: large impurities are filtered out of the washing liquid, whereby it is prevented that they can reach the pump-out pressure chamber and from there into the circulating pump-out pressure chamber.
In a further advantageous embodiment of the laundry care appliance, the filter element or the further filter element comprises a foreign-matter trap for removing impurities from the washing liquid
In particular, the foreign-matter trap comprises a plate extending in the pumping direction, which plate has in particular a front edge in the pumping direction, wherein foreign matter can accumulate on this front edge, and/or wherein the foreign-matter trap comprises in particular a receiving region for receiving foreign matter.
This achieves the technical advantage that: unlike other filters (e.g. sieve elements), the foreign-matter trap is not blocked by the accumulated impurities, so that periodic cleaning of the foreign-matter trap during the service life of the washing-care appliance is not necessary, since the foreign-matter trap is designed such that it traps the foreign matter during the service life of the appliance. The impurities removed from the washing liquid by the foreign-matter trap can be pumped out of the pump during the pumping-out process through the pump-out pressure chamber and through the pump-out line. An effective accumulation of impurities is achieved by means of a plate element, for example, which extends in the pumping direction and has an edge which is forward in the pumping direction. At the same time, the leading edge has a low flow resistance
Thereby, the liquid flow of the washing liquid pumped by the pump is not significantly impaired by the plate, however, foreign matter can be successfully precipitated. Furthermore, the foreign-matter trap can comprise a receiving region in which impurities can be deposited, in particular as a result of the flow of the washing liquid being gentle, and can therefore be received in the receiving regionIn the receiving area. Depending on the design, foreign bodies or pile-hair accumulations accumulate in this receiving region during longer service intervals or over the entire appliance service life.
In a further advantageous embodiment of the laundry care appliance, the pump has a pump motor and a running wheel which are arranged on the circulating pumping pressure chamber, wherein the pump motor is configured to: the impeller is driven in a rotational direction at a predetermined rotational speed in order to pump the washing liquid from the pump outlet pressure chamber into the circulating pump outlet pressure chamber and via the circulating pump outlet pressure line into the circulating pump line.
This achieves the technical advantage that: the effective circulation of the washing liquid from the circulation pumping pressure chamber into the circulation pumping line is achieved by the driving of the running wheel by the pump motor.
In a further advantageous embodiment of the laundry care appliance, the pump has a further pump motor and a further running wheel which are arranged on the pump-out pressure chamber, wherein the further pump motor is designed to: the other running wheel is driven in a rotational direction in order to pump the washing liquid from the suction chamber into the pump-out pressure chamber and via the pump-out pressure connection into the pump-out line.
This achieves the technical advantage that: an effective pumping of the washing liquid out of the pump-out pressure chamber into the pump-out line is achieved by driving a further running wheel by a further pump motor.
In a further advantageous embodiment of the laundry care appliance, the pump motor or the further pump motor comprises an electric motor, in particular a brushless direct current motor (BLDC motor) or a permanently excited brushless synchronous motor, which can be driven with a variable rotational speed and adjustable rotational direction (drehrichtongsourcert).
This achieves the technical advantage that: an efficient and effective variable-speed pump-out process (or cyclical pump-out process) of the pump can be operated by means of an electric motor, in particular a brushless dc motor or a synchronous motor.
In a further advantageous embodiment of the laundry care appliance, the further pump motor is configured for: the other running wheel is driven in the first or second direction of rotation in order to pump the washing liquid through the pump-out pressure connection into the pump-out line or from the pump-out pressure chamber into the circulating pump-out pressure chamber depending on the direction of rotation and the rotational speed of the other running wheel.
This achieves the technical advantage that: the rotation direction and the rotation speed of the other working wheel can be effectively controlled by adjusting the rotation direction and the rotation speed of the other pump motor: whether the washing liquid can be pumped from the pump-out pressure chamber into the pump-out line and thus from the laundry care appliance or from the pump-out pressure chamber into the circulating pump-out pressure chamber and thus into the circulating pump-out system.
In a further advantageous embodiment of the laundry care appliance, a separating wall is arranged between the suction chamber and the pump-out pressure chamber for separating the suction chamber from the pump-out pressure chamber, wherein the separating wall has an opening (in particular a central, concentric opening) for fluidically connecting the suction chamber and the pump-out pressure chamber to one another.
This achieves the technical advantage that: the partition wall ensures an effective separation of the suction chamber from the pump-out pressure chamber, also with respect to foreign bodies and hairs and fluff agglomerates, wherein a fluid-effective connection is achieved between the suction chamber and the pump-out pressure chamber via the opening. Such a particularly concentric opening is usually realized as a suction tube between a suction chamber and a pump-out pressure chamber.
In a further advantageous embodiment of the laundry care appliance, a further separating wall is arranged between the pump-out pressure chamber and the circulating pump-up pressure chamber, in order to separate the pump-out pressure chamber from the circulating pump-up pressure chamber and to trap foreign bodies or impurities, wherein the further separating wall has a further opening for fluidically connecting the pump-out pressure chamber and the circulating pump-up pressure chamber to one another.
This achieves the technical advantage that: an effective separation of foreign bodies and hair and fluff agglomerates between the suction chamber and the recirculating pumping pressure chamber is ensured, for example, by a further separating wall, wherein an effective fluidic connection between the pump-out pressure chamber and the recirculating pumping pressure chamber is achieved by a further (in particular concentric) opening. The pump-out pressure chamber functions here as a suction chamber connected upstream for the circulating pump-out pressure chamber. Such flow smoothing for the extraction and storage of foreign bodies can only be achieved with difficulty in the pump-out pressure chamber, i.e. the suction chamber of the recirculating pump-out pressure chamber. These trapped foreign bodies are thus removed from the pump during the subsequent pumping.
In a further advantageous embodiment of the laundry care appliance, a suction line is arranged between the suction chamber and the pump-out pressure chamber for fluidically connecting the suction chamber and the pump-out pressure chamber to one another, and/or a further suction line is arranged between the pump-out pressure chamber and the circulating pump-out pressure chamber for fluidically connecting the pump-out pressure chamber and the circulating pump-out pressure chamber to one another.
This achieves the technical advantage that: a fluidically effective connection between the respective chambers of the pump is ensured by the suction tube or by a further suction tube. Furthermore, the suction duct is also provided for: the foreign bodies are kept away from the pump outlet pressure chamber in order to thereby enable safe pump operation. Furthermore, the suction pipe supplies the suction-side flow axially and concentrically to the running wheel in order to provide the best prerequisites for an extremely efficient and successful pressure increase in radial (radial) fluid machines.
In a further advantageous embodiment of the laundry care appliance, a further suction tube is attached tangentially to the pump-out pressure chamber in order to achieve effective pumping of the washing liquid from the pump-out pressure chamber through the further suction tube into the circulating pump-out pressure chamber with a predetermined direction of rotation and rotational speed.
This achieves the technical advantage that: the tangential arrangement of the further suction line on the pump-out pressure space ensures that the washing liquid is effectively pumped through the further suction line as a function of the direction of rotation and/or the speed of rotation of the running wheel of the pump motor.
In a further advantageous embodiment of the laundry care appliance, the pump-out pressure connection is attached tangentially to the pump-out pressure chamber and the circulation pump-out pressure connection is attached tangentially to the circulation pump-out pressure chamber for effective pumping-out of the washing liquid from the pump-out pressure chamber and effective circulation pumping of the washing liquid from the circulation pump-out pressure chamber, wherein the pump-out pressure connection and the circulation pump-out pressure connection extend in particular in different directions on the lateral surface of the cylindrical ring housing of the pump-out pressure chamber and of the circulation pump-out pressure chamber.
This achieves the technical advantage that: the tangential arrangement of the pump-out pressure connection (or the recirculating pump pressure connection) ensures that the washing liquid is pumped efficiently through the respective connection depending on the direction of rotation and/or the rotational speed of the running wheel of the pump motor.
According to a second aspect of the invention, the object is achieved by a method for pumping washing liquor in a laundry care appliance having a pump for pumping washing liquor, wherein the pump has: a suction chamber provided with a suction connection for a fluidic connection to the suction line, a circulation pumping pressure chamber provided with a circulation pumping pressure connection for a fluidic connection to the circulation pumping line, and a pumping pressure chamber provided with a pumping pressure connection for a fluidic connection to the pumping line, wherein the pumping pressure chamber is fluidically connected to the suction chamber, wherein the pumping pressure chamber is fluidically connected to the circulation pumping pressure chamber, wherein the pump comprises a filter element which is received in the pumping pressure chamber, wherein the filter element is designed to: filtering out impurities from the washing liquid for preventing the impurities from being transported to the recirculating pumping pressure chamber, and wherein the method comprises: activating a pump during a circulation pumping process for pumping washing liquid from a pump-out pressure chamber into a pump-out line or from a circulation pumping pressure chamber into a circulation pumping line, and the method comprises: the pump is activated during a pumping-out process following the circulation pumping-out process in order to pump impurities which have accumulated on the filter element together with the washing liquid out of the pumping-out pressure chamber into the pumping-out line and out of the laundry care appliance.
This achieves the technical advantage that: by means of the filter element in the pump-out pressure chamber and by means of the serial connection of the pump-out pressure chamber to the circulating pumping pressure chamber, impurities in the pump-out pressure chamber can be filtered out of the washing liquid during the circulating pumping process and cannot reach the circulating pumping pressure chamber. During the pump-out process following the circulation pump-out process, impurities which accumulate in the pump-out pressure chamber can be pumped out of the pump-out pressure chamber together with the washing liquid into the pump-out line and thus out of the laundry care appliance and thus removed from the pump.
In an advantageous embodiment of the method, the pump has: a pump motor for pumping washing liquid from the circulation pump feed chamber, a further pump motor for pumping washing liquid from the pump discharge pressure chamber, and control means for controlling the pump motor and the further pump motor, and the method comprises: the two pump motors are activated alternately or simultaneously during the cyclical pumping process or during the pumping process in order to pump impurities which accumulate on the filter element together with the washing liquid out of the pump pressure chamber into the pump-out line.
This achieves the technical advantage that: by activating the two pump motors alternately or simultaneously during the cyclical pumping process or during the pumping process, an efficient pumping out of impurities from the pump-out pressure chamber is ensured.
In a further advantageous embodiment of the method, the method comprises: the two pump motors are activated alternately or simultaneously during the circulating pumping process or during the pumping process in a predetermined rotational direction and rotational speed in order to pump out the air contained in the washing liquid through the pump-out line and through the circulating pumping line and thereby accelerate the pumping-out and venting process of the circulating pumping pressure chamber.
This achieves the technical advantage that: in addition to the cleaning purpose, an effective ventilation of the circulating pumping pressure chamber or of the pumping-out pressure chamber is ensured by alternately or simultaneously activating the two pump motors during the circulating pumping process or during the pumping-out process.
Drawings
Further embodiments are explained with reference to the drawings. The figures show:
fig. 1 shows a schematic view of a laundry care appliance;
fig. 2 shows a schematic view of a pump of a laundry care appliance in a sectional illustration;
fig. 3 shows a rear view of the pump of the laundry care appliance; and
fig. 4 shows a flow chart of a method for pumping washing liquid in a laundry care appliance.
Detailed Description
Fig. 1 shows a schematic view of a generic laundry care appliance 100, for example a washing machine. The laundry care appliance 100 comprises a rinsing housing 101, into which rinsing housing 101 a detergent or other liquid substance can be injected. The laundry care appliance 100 comprises a door 103 for loading the laundry care appliance 100 with laundry.
Fig. 2 shows a schematic view of the pump 105 of the laundry care appliance 100 in a sectional illustration. The laundry care appliance 100 comprises a pump 105 for pumping washing liquid. The pump 105 is fluidically connected to the suction line for sucking in washing liquid through the suction line. The pump 105 is connected to the outlet line of the laundry care appliance 100 in order to pump washing liquor out of the laundry care appliance 100 via the outlet line. The pump 105 is connected to the circulation pump line of the laundry care appliance 100 for circulating the washing liquid in the laundry care appliance 100, i.e. for pumping out the washing liquid from the lye container of the laundry care appliance 100 via the circulation pump line and for returning the pumped-out washing liquid to the lye container. The suction line, the pump-out line and the circulation pump line are not shown in fig. 2.
The pump 105 comprises a suction chamber 107, the suction chamber 107 having a suction connection 109, the suction connection 109 in turn being fluidically connectable to a suction line. Furthermore, the pump 105 comprises a pump-out pressure chamber 111, the pump-out pressure chamber 111 having a pump-out pressure connection 113, the pump-out pressure connection 113 in turn being fluidically connectable to a pump-out line. Furthermore, the pump 105 comprises a circulating pumping pressure chamber 115, the circulating pumping pressure chamber 115 having a circulating pumping pressure connection 117, which circulating pumping pressure connection 117 can in turn be fluidically connected to a circulating pumping line of the circulating pumping system.
The suction chamber 107 is fluidically connected to the pump-out pressure chamber 111 via a suction tube 119. As is also shown in fig. 2, the pump-out pressure chamber 111 is fluidically connected to the circulating pump-out pressure chamber 115 via a further suction line 121.
Here, a filter element (or foreign matter trap) is received in the pump-out pressure chamber 111, which filter element (or foreign matter trap) is configured for: filtering out impurities from the scrubbing liquid to prevent the impurities from being transported into the recirculating pumping pressure chamber 115. Furthermore, a further filter element (or foreign matter trap) is received in the suction chamber 107, which further filter element (or foreign matter trap) is configured for: filtering out impurities from the scrubbing liquid to prevent impurities from being transported into the pump-out pressure chamber 111 and from the pump-out pressure chamber 111 into the circulating pump pressure chamber 115. The filter element and the further filter element are not shown in fig. 2.
In order to be able to reduce (or conduct away) the accumulation of foreign bodies and/or hairs and fluff agglomerates before the recirculating pumping pressure chamber 115, the pump-out pressure chamber 111 and the recirculating pumping pressure chamber 115 are connected in series, and the recirculating pumping pressure chamber 115 is not directly fluidically connected to the suction chamber 107. The fluidic connection from the upstream suction chamber 107 to the recirculating pumping pressure chamber 115 can only be achieved by flowing through the pump-out pressure chamber 111. As a result, foreign bodies and larger hairs and fluff agglomerates are initially retained in the pump-out pressure chamber 111 and are only transported out of the laundry care appliance 100 in a temporally subsequent pump-out process from the pump-out pressure chamber 111 through the pump-out pressure connection 113 into the pump-out line.
Fig. 3 shows a rear view of the pump of the laundry care appliance. The pump 105 includes: a suction chamber 107 with a suction connection 109, a pump-out pressure chamber 111 with a pump-out pressure connection 113, and a circulating pump-out pressure chamber 115 with a circulating pump-out pressure connection 117. A partition wall 123 is arranged between the suction chamber 107 and the pump-out pressure chamber 111, wherein the partition wall 123 has an opening 125 for fluidically connecting the suction chamber 107 to the pump-out pressure chamber 111 via the opening 125 (or via the suction tube 119).
The pump-out pressure chamber 111 is fluidically connected to the circulating pump-out pressure chamber 115 via a further suction line 121.
On the outside of the pump 105, a vibration damping section 127 is arranged, which vibration damping section 127 rests on an appliance housing, not shown in fig. 2, of the laundry care appliance 100 in order to ensure that vibrations of the pump 105 on the appliance housing are damped.
A pump motor 129 is arranged on the circulating pumping pressure chamber 115, the pump motor 129 being configured to: the washing liquid is pumped out through the circulation pumping pressure connection 117 of the circulation pumping pressure chamber 115 by the rotation of the running wheel (or impeller).
A further pump motor, which is not illustrated in fig. 3 and is designed to: the washing liquid is pumped out through the pump-out pressure connection 113 by the rotation of the running wheel (or impeller), or the further pump motor is configured for: the washing liquid is pumped from the pump-out pressure chamber 111 into the circulating pump-in pressure chamber 115 by reversing the direction of rotation of the running wheel.
In order to generate different delivery flows for pumping or circulating pumping, not only must the rotational direction of the further pump motor be reversed and the rotational speed be adapted during a function change, but also the structural geometry of the pump-out pressure connection 113 on the pump-out pressure chamber 111 and of the further suction tube 121 between the pump-out pressure chamber 111 and the circulating pumping pressure chamber 115 must be adapted. It is decisive here that the pump-out pressure connection 113 and the further suction pipe 121 are attached tangentially to the pump-out pressure chamber 111, wherein the pump-out pressure connection 113 and the further suction pipe 121 extend in different directions on the lateral surface of the cylindrical ring body of the pump-out pressure chamber 111. Thus, as shown in fig. 3, for example, the pump-out pressure connection 113 and the further suction line 121 are oriented upward on the pump-out pressure chamber 111, but have a further geometric orientation with respect to the direction of rotation of the running wheel of the further pump motor. If the fluid (in particular the washing liquid) rotates in the pump-out pressure chamber 111 in a clockwise direction, the pump-out pressure connection 113 is preferred in terms of the feed flow. If the fluid (in particular the washing liquid) rotates in the pump-out pressure chamber 111 in the counterclockwise direction, a further suction tube 121 is preferred in terms of the feed flow technology. In the case of different directions of rotation of the running wheels driven by the further pump motor and an adaptation of the rotational speed, a feed flow can be generated which is directed either via the further suction pipe 121 into the recirculating pumping pressure chamber 115 or via the pumping pressure connection 113 out of the pumping pressure chamber 111.
This new and proposed connection of the different pump functions enables a serial connection (Reihenschaltung) of two different foreign body traps. Thus, foreign bodies can be deposited in a systematic manner at different locations depending on their geometry. Large foreign bodies are already filtered in a further filter element (in particular a foreign body trap) in the suction chamber 107, as a result of which foreign bodies cannot reach the pump-out pressure chamber 111 or the circulating pump-out pressure chamber 115. Smaller foreign bodies are separated by the filter element in the pump-out pressure chamber 111 of the emptying pump and do not reach the circulating pump pressure chamber 115, but are pumped out of the device in a temporally subsequent pump-out process via the pump-out pressure connection 113 and are removed before the next pump-out process is blocked by a further suction line 121 which is used for the circulating pump pressure chamber 115.
The advantages of this new pre-filter connection are clearly explained next. The pump 105 or the entire recirculating pumping system, which generally has a smaller flow cross section than the emptying system, is more resistant to foreign bodies (robuster), as a result of which fewer blockages occur in the recirculating pumping pressure chamber 115 and in the circuits connected downstream, as a result of which, in turn, fewer customer service interventions are required at the user of the laundry care appliance 100. Smaller customer service investment reduces plant quality costs. By connecting the filter elements in series, a better selection of foreign bodies in terms of quality can be achieved, depending on their size. The clogging of the suction side of the circulating pumping pressure chamber 115 can be actively solved by a pulse-like emptying operation of the pump-out pressure chamber 111 in turn. A large blockage of the inflow of the circulating pumping pressure chamber 115 can even be removed mechanically by the rotor blades of the pump 105 in the pump-out pressure chamber 111.
Fig. 4 shows a flowchart of a method 200 for pumping washing liquid in a laundry care appliance 100 with a pump 105, which pump 105 is illustrated according to fig. 2 and 3. As a first method step, the method comprises: during the circulation pumping process, the pump 105 is activated 201 for pumping washing liquid from the pump-out pressure chamber 111 into the pump-out line or through the circulation pumping pressure chamber 115 into the circulation pumping line. As a second method step, the method comprises: during the pump-out process following the circulation pump-out process, the pump 105 is activated 203 in order to pump out the impurities accumulated on the filter element together with the washing liquid from the pump-out pressure chamber 111 into the pump-out line and thus out of the laundry care appliance 100.
In the event of a foam of the washing liquid, a certain dead time (Totzeit) in the delivery flow build-up occurs as a result of the venting process of the pump chambers 107, 111, 115, as a result of the delayed restart process of the pump 105. In order to accelerate this ventilation process considerably, the two pump motors 129 can be switched on if the pump motor 129 and the further pump motor are controlled independently. Thereby, the conveying capacity for the filter system is significantly increased and the venting process is accelerated by the serial connection of the pump-out pressure chamber 111 and the circulating pump-up pressure chamber 115. In the case of a ventilation of the suction chamber 107, the pump-out pressure chamber 111 or the circulating pump pressure chamber 115, a restart of the further pump motor of the pump-out pressure chamber 111 is effected considerably more quickly than in the case of a parallel connection (Parallelschaltung) of the pump-out pressure chamber 111 and the circulating pump pressure chamber 115 or also than in the case of a conventional emptying pump. When the venting process of the pump-out pressure chamber 111 and the circulating pumping pressure chamber 115 is complete and a delivery flow is established, the inactive pump motor 129 can be shut off and only the active pump motor 129 can deliver further cleaning solution. By means of the short-term activation of the inactive pump motor 129, the start of the pump 105 with the ventilation process can thereby be accelerated considerably. This can be particularly helpful in order to keep the pump interruption and the stripping (abris) of the feed flow small in time in the case of spin-drying with a high revolution of the drum drive, and to quickly restart the pump 105 so that the drum does not sink into the water retention in the lye container (Wasserr ü ckstaumenge). During spin-drying, the drum sinks into the sump volume, which ultimately leads to a large motor load (i.e. a strong increase in torque) and often to a disruption of the spin-drying process in terms of process technology, since in the lye container there is a water ring which can be detected by the pressure sensor but cannot be pumped out, since the washing lye can no longer reach the pump.
All features explained and illustrated in conjunction with the individual embodiments of the invention can be provided in different combinations in the subject matter according to the invention to achieve their advantageous effects at the same time.
The scope of protection of the invention is provided by the claims and is not limited by the features explained in the description or shown in the drawings.
List of reference numerals
100 washing nursing device
101 punch-in shell
103 door
105 pump
107 suction lumen
109 suction connection
111 pump-out pressure chamber
113 pump-out pressure connection pipe
115 circulating pumping pressure chamber
117 circulating pumping pressure connecting pipe
119 suction pipe
121 another suction pipe
123 partition wall
125 opening
127 damping section
129 pump motor
200 method for pumping washing liquid in a laundry care appliance
201 activating a pump during a cyclical pumping process
203 activate the pump during the pumping process
Claims (16)
1. A laundry care appliance (100) having a pump (105) for pumping washing liquid,
wherein the pump (105) comprises a suction chamber (107) having a suction connection (109) for the fluidic connection to a suction line,
wherein the pump (105) comprises a circulating pumping pressure chamber (115) having a circulating pumping pressure connection (117) for the fluidic connection to a circulating pumping line,
wherein the pump (105) comprises a pump-out pressure chamber (111) having a pump-out pressure connection (113) for fluidically connecting a pump-out line thereto, and
wherein the pump-out pressure chamber (111) and the suction chamber (107) are fluidically connected,
it is characterized in that the preparation method is characterized in that,
the pump-out pressure chamber (111) and the circulating pump-up pressure chamber (115) are fluidically connected, and
the pump (105) comprising a filter element received in the pump-out pressure chamber (111),
wherein the filter element is configured to: filtering out impurities from the washing liquid for preventing the transport of impurities from the pump-out pressure chamber (111) into the circulating pump-out pressure chamber (115),
wherein the pump (105) comprises a further filter element received in the suction chamber (107),
wherein the further filter element is configured for: impurities are filtered out of the washing liquid in order to prevent impurities from being transported from the suction chamber (107) into the pump-out pressure chamber (111).
2. Laundry care appliance (100) according to claim 1,
it is characterized in that the preparation method is characterized in that,
the filter element or the further filter element comprises a foreign-matter trap for removing impurities from the washing liquid,
wherein the foreign body trap comprises a plate extending in the pumping direction, which plate has an edge that is forward in the pumping direction,
wherein impurities can accumulate on said preceding edge, or
Wherein the foreign matter trap comprises a receiving area for receiving impurities.
3. Laundry care appliance (100) according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the pump (105) has a pump motor (129) and a running wheel, which are arranged on the circulating pumping pressure chamber (115),
wherein the pump motor (129) is configured for: the rotor is driven in a rotational direction at a predetermined rotational speed in order to pump washing liquid from the pump-out pressure chamber (111) into the circulation pump pressure chamber (115) and via the circulation pump pressure connection (117) into the circulation pump line.
4. Laundry care appliance (100) according to claim 3,
it is characterized in that the preparation method is characterized in that,
the pump (105) has a further pump motor and a further running wheel which are arranged on the pump-out pressure chamber (111),
wherein the further pump motor is configured to: the further running wheel is driven in a rotational direction at a predetermined rotational speed for pumping washing liquid from the suction chamber (107) into the pump-out pressure chamber (111) and through the pump-out pressure connection (113) into the pump-out line.
5. The laundry care appliance (100) of claim 4,
it is characterized in that the preparation method is characterized in that,
the pump motor (129) or the further pump motor comprises an electric motor which can be driven with a variable rotational speed and an adjustable rotational direction.
6. The laundry care appliance (100) of claim 4 or 5,
it is characterized in that the preparation method is characterized in that,
the further pump motor is configured to: the further running wheel is driven in a first or second direction of rotation in order to pump washing liquid through the pump-out pressure connection (113) into the pump-out line or from the pump-out pressure chamber (111) into the circulating pump-out pressure chamber (115) depending on the direction of rotation and the rotational speed of the further running wheel.
7. The laundry care appliance (100) of any one of claims 1, 2, 4, 5,
it is characterized in that the preparation method is characterized in that,
a separating wall (123) is arranged between the suction chamber (107) and the pump-out pressure chamber (111) for separating the suction chamber (107) from the pump-out pressure chamber (111),
wherein the partition wall (123) has an opening (125) for fluidically connecting the suction chamber (107) and the pump-out pressure chamber (111) to one another.
8. The laundry care appliance (100) of any one of claims 1, 2, 4, 5,
it is characterized in that the preparation method is characterized in that,
a further separating wall is arranged between the pump-out pressure chamber (111) and the circulating pumping pressure chamber (115) for separating the pump-out pressure chamber (111) from the circulating pumping pressure chamber (115) and for trapping foreign bodies or impurities,
wherein the further separating wall has a further opening for fluidically connecting the pump-out pressure chamber (111) and the circulating pumping pressure chamber (115) to one another.
9. The laundry care appliance (100) of any one of claims 1, 2, 4, 5,
it is characterized in that the preparation method is characterized in that,
a suction tube (119) is arranged between the suction chamber (107) and the pump-out pressure chamber (111) for fluidically connecting the suction chamber (107) and the pump-out pressure chamber (111) to one another, or
A further suction line (121) is arranged between the pump-out pressure chamber (111) and the circulating pumping pressure chamber (115) in order to fluidically connect the pump-out pressure chamber (111) and the circulating pumping pressure chamber (115) to one another.
10. Laundry care appliance (100) according to claim 9,
it is characterized in that the preparation method is characterized in that,
the further suction pipe (121) is tangentially attached to the pump-out pressure chamber (111) for effecting an effective pumping of washing liquid from the pump-out pressure chamber (111) through the further suction pipe (121) into the circulating pumping pressure chamber (115) with a predetermined direction of rotation and rotational speed.
11. Laundry care appliance (100) according to any of claims 1, 2, 4, 5, 10,
it is characterized in that the preparation method is characterized in that,
the pump-out pressure connection (113) is tangentially attached to the pump-out pressure chamber (111), and
the circulation pumping pressure connection (117) is tangentially attached to the circulation pumping pressure chamber (115) for enabling an efficient pumping out of washing liquid from the pump-out pressure chamber (111) and an efficient circulation pumping of washing liquid from the circulation pumping pressure chamber (115),
wherein the pump-out pressure connection (113) and the circulation pumping pressure connection (117) extend in different directions on the lateral surfaces of the cylindrical ring-shaped housing of the pump-out pressure chamber (111) and of the circulation pumping pressure chamber (115).
12. The laundry care appliance (100) of claim 5,
it is characterized in that the preparation method is characterized in that,
the pump motor (129) or the further pump motor comprises a brushless direct current motor or a permanently excited brushless synchronous motor.
13. Laundry care appliance (100) according to claim 7,
it is characterized in that the preparation method is characterized in that,
the partition wall (123) has a central, concentric opening (125).
14. A method (200) for pumping washing liquid in a laundry care appliance (100) having a pump (105) for pumping washing liquid,
wherein the pump (105) has:
a suction chamber (107) having a suction connection (109) for the fluidic connection to a suction line,
-a circulation pumping pressure chamber (115) having a circulation pumping pressure connection (117) for fluidic connection with a circulation pumping line, and
a pump-out pressure chamber (111) having a pump-out pressure connection (113) for fluidically connecting a pump-out line,
wherein the pump-out pressure chamber (111) and the suction chamber (107) are fluidically connected,
wherein the pump-out pressure chamber (111) and the circulating pumping pressure chamber (115) are fluidically connected,
wherein the pump (105) comprises a filter element received in the pump-out pressure chamber (111),
wherein the filter element is configured to: filtering out impurities from the washing liquid for preventing the impurities from being transported into the circulating pumping pressure chamber (115),
it is characterized in that the preparation method is characterized in that,
the method (200) comprises:
-activating (201) the pump (105) during a cyclic pumping process for pumping washing liquid from the pump-out pressure chamber (111) into the pump-out line or from the cyclic pumping pressure chamber (115) into the cyclic pumping line, and
-activating (203) the pump (105) during a pump-out process following the circulation pump-out process for pumping out impurities accumulated on the filter element together with washing liquid from the pump-out pressure chamber (111) into the pump-out line and out of the laundry care appliance (100),
wherein the pump (105) comprises a further filter element received in the suction chamber (107),
wherein the further filter element is configured for: impurities are filtered out of the washing liquid in order to prevent impurities from being transported from the suction chamber (107) into the pump-out pressure chamber (111).
15. The method (200) of claim 14,
it is characterized in that the preparation method is characterized in that,
the pump (105) has:
-a pump motor (129) for pumping washing liquid from the circulating pumping pressure chamber (115),
-a further pump motor for pumping washing liquid from the pump-out pressure chamber (111), and
-control means for controlling the pump motor (129) and the further pump motor, and
the method (200) comprises:
during the cyclical pumping process or during the pumping-out process, the two pump motors (129) are activated (201, 203) alternately or simultaneously in order to pump impurities which accumulate on the filter element together with the washing liquid out of the pump-out pressure chamber (111) into the pump-out line.
16. The method (200) of claim 14,
it is characterized in that the preparation method is characterized in that,
the pump (105) has:
-a pump motor (129) for pumping washing liquid from the circulating pumping pressure chamber (115),
-a further pump motor for pumping washing liquid from the pump-out pressure chamber (111), and
-control means for controlling the pump motor (129) and the further pump motor, and
the method (200) comprises:
during the circulating pumping process or during the pumping-out process, the two pump motors (129) are activated (201, 203) alternately or simultaneously with a predetermined rotational direction and rotational speed in order to pump out air contained in the washing liquid through the pumping-out line and through the circulating pumping line and thereby accelerate the pumping-out and venting process of the pumping-out pressure chamber (111) and the circulating pumping pressure chamber (115).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016203179.1A DE102016203179B3 (en) | 2016-02-29 | 2016-02-29 | Laundry care unit with a pump |
| DE102016203179.1 | 2016-02-29 | ||
| PCT/EP2017/051200 WO2017148617A1 (en) | 2016-02-29 | 2017-01-20 | Laundry appliance having a pump and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108699756A CN108699756A (en) | 2018-10-23 |
| CN108699756B true CN108699756B (en) | 2020-12-04 |
Family
ID=57882077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780014001.3A Active CN108699756B (en) | 2016-02-29 | 2017-01-20 | Laundry care appliance with pump and method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3423625B1 (en) |
| CN (1) | CN108699756B (en) |
| DE (1) | DE102016203179B3 (en) |
| PL (1) | PL3423625T3 (en) |
| RU (1) | RU2692222C1 (en) |
| WO (1) | WO2017148617A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019207346A1 (en) * | 2019-05-20 | 2020-11-26 | BSH Hausgeräte GmbH | Laundry care device with a pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3727435A (en) * | 1971-12-27 | 1973-04-17 | Gen Motors Corp | Self-cleaning lint filter for a recirculating clothes washer |
| CN1240849A (en) * | 1998-06-30 | 2000-01-12 | 大宇电子株式会社 | Drum type washing machine having pump integrally formed with filter |
| CN101896112A (en) * | 2007-12-14 | 2010-11-24 | Bsh博世和西门子家用器具有限公司 | Water conducting household appliance |
| WO2011147009A2 (en) * | 2010-05-26 | 2011-12-01 | Electrolux Do Brasil S.A. | Improvement of self-cleaning filter for washing machines |
| CN202559120U (en) * | 2011-01-21 | 2012-11-28 | 三星电子株式会社 | Washing machine |
| EP2772582A1 (en) * | 2013-02-27 | 2014-09-03 | Samsung Electronics Co., Ltd. | Washing machine |
| CN104854271A (en) * | 2012-09-28 | 2015-08-19 | 陶氏环球技术有限责任公司 | Washing maching including integral filter module and aerator |
-
2016
- 2016-02-29 DE DE102016203179.1A patent/DE102016203179B3/en not_active Expired - Fee Related
-
2017
- 2017-01-20 PL PL17701312T patent/PL3423625T3/en unknown
- 2017-01-20 RU RU2018130483A patent/RU2692222C1/en active
- 2017-01-20 WO PCT/EP2017/051200 patent/WO2017148617A1/en active Application Filing
- 2017-01-20 CN CN201780014001.3A patent/CN108699756B/en active Active
- 2017-01-20 EP EP17701312.5A patent/EP3423625B1/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3727435A (en) * | 1971-12-27 | 1973-04-17 | Gen Motors Corp | Self-cleaning lint filter for a recirculating clothes washer |
| CN1240849A (en) * | 1998-06-30 | 2000-01-12 | 大宇电子株式会社 | Drum type washing machine having pump integrally formed with filter |
| CN101896112A (en) * | 2007-12-14 | 2010-11-24 | Bsh博世和西门子家用器具有限公司 | Water conducting household appliance |
| WO2011147009A2 (en) * | 2010-05-26 | 2011-12-01 | Electrolux Do Brasil S.A. | Improvement of self-cleaning filter for washing machines |
| CN202559120U (en) * | 2011-01-21 | 2012-11-28 | 三星电子株式会社 | Washing machine |
| CN104854271A (en) * | 2012-09-28 | 2015-08-19 | 陶氏环球技术有限责任公司 | Washing maching including integral filter module and aerator |
| EP2772582A1 (en) * | 2013-02-27 | 2014-09-03 | Samsung Electronics Co., Ltd. | Washing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108699756A (en) | 2018-10-23 |
| RU2692222C1 (en) | 2019-06-21 |
| DE102016203179B3 (en) | 2017-05-11 |
| PL3423625T3 (en) | 2020-08-10 |
| EP3423625B1 (en) | 2020-03-11 |
| EP3423625A1 (en) | 2019-01-09 |
| WO2017148617A1 (en) | 2017-09-08 |
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