RU2635974C2 - Machine for linen washing with improved detergent activation - Google Patents

Machine for linen washing with improved detergent activation Download PDF

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Publication number
RU2635974C2
RU2635974C2 RU2013143056A RU2013143056A RU2635974C2 RU 2635974 C2 RU2635974 C2 RU 2635974C2 RU 2013143056 A RU2013143056 A RU 2013143056A RU 2013143056 A RU2013143056 A RU 2013143056A RU 2635974 C2 RU2635974 C2 RU 2635974C2
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RU
Russia
Prior art keywords
drum
tank
machine
nozzles
detergent
Prior art date
Application number
RU2013143056A
Other languages
Russian (ru)
Other versions
RU2013143056A (en
Inventor
Альдо ФУМАГАЛЛИ
Original Assignee
Канди С.П.А.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP20120425164 priority Critical patent/EP2719814A1/en
Priority to EP12425164.6 priority
Application filed by Канди С.П.А. filed Critical Канди С.П.А.
Publication of RU2013143056A publication Critical patent/RU2013143056A/en
Application granted granted Critical
Publication of RU2635974C2 publication Critical patent/RU2635974C2/en

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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02Devices for adding soap or other washing agents
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005Methods for washing, rinsing or spin-drying
    • D06F35/006Methods for washing, rinsing or spin-drying for washing or rinsing only
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26Casings; Tubs
    • D06F37/266Gaskets mounted between tub and casing around the loading opening
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08Liquid supply or discharge arrangements
    • D06F39/083Liquid discharge or recirculation arrangements

Abstract

FIELD: human life necessities satisfaction.
SUBSTANCE: washing machine includes a washing tub (2) comprising a rotary drum (3), a detergent compartment (5) fluidly connected to a liquid source, a supply tube to supply liquid and detergent to the tank (2), a recirculation loop (10) for liquid withdrawal from the tank bottom (2) and feeding it back to the drum (3), a control and monitoring unit (22) for creation of a flow of liquid and detergent into the tank (2) and for mixture recirculation in the period of time T under the influence of drum (3) rotation with the speed V. The control and monitoring unit (22) provides drum (3) acceleration for a period of time T to a value sufficient to cause at least partial spinning of laundry for a time t less than the time T, the control and monitoring unit (22) activates the recirculation loop (10) in the period t to irrigate the interior of the drum (3) with a recirculating liquid through a plurality of nozzles (11).
EFFECT: detergent activation is improved.
13 cl, 3 dwg

Description

The invention relates to a washing machine with enhanced activation of a detergent.
As used herein, the term “washing machine” is intended to mean any machine adapted to perform laundry washing operations, regardless of the possibility or impossibility of drying the laundered laundry. Thus, in the present description and the appended claims, the definition of washing machines also covers combinations of washing and drying machines.
The washing machine of the present invention is a type of machine that includes a tub containing a drum for loading laundry to be washed that rotates about an axis of rotation, a detergent drawer, fluidly coupled to a liquid source, a supply tube located between the wash drawer means and a tank, for the mixture of liquid and detergent to enter the tank, a recirculation circuit passing between the lower region of the tank and the plurality of injection nozzles directed inside the drum, which serves to extracting liquid from the bottom of the tank and feeding it back into the drum, a control and monitoring unit for creating a flow into the tank of a predetermined amount of a mixture of liquid and detergent and for recirculating this mixture for a period of time T during rotation of the drum with speed V.
As you know, the cycle of work in washing machines includes an initial stage of duration T, during which a stream of detergent is created, the dose of which is in the form of powder, granules or liquid loaded into the detergent compartment. The first, relatively small, amount of liquid, usually water, is supplied to this compartment, providing a dose of detergent from the detergent compartment to the machine tank.
To ensure complete dissolution of the dose of detergent, an additional amount of liquid is later added to the first amount of liquid carrying the detergent in accordance with the load of the machine with the laundry.
In the state of the art, the total amount of liquid in the tank at the preliminary stage of the washing cycle, also known as the detergent activation stage, usually does not exceed 5 liters. Considering that the dose of detergent used for the usual load of laundry weighing 5 kg is 150 g, the concentration of detergent in the liquid at this stage of the cycle reaches 30 g / liter.
Although the recirculation of the liquid with the detergent lasts for a sufficiently long time T, usually 10 or 12 minutes, when the drum rotates at a speed V to distribute the laundry in the drum, also known as the satellite speed, usually lying in the range from 75 rpm to 120 rpm / min, recycle liquid with detergent does not reach all parts of the laundry. Since most of the recycle liquid is absorbed by wet laundry, the amount of recycle liquid is smaller and further decreases when the cycle is performed during time T, which limits the distribution of detergent in the laundry.
Therefore, in the decisions of the previous level, the detergent is distributed over the laundry, mainly at the next stages of the washing cycle.
However, at these stages an additional amount of liquid is added to the initial amount of liquid, which increases its total amount to about 15 liters and reduces the concentration of detergent from an initial concentration of 30 g / l to 10 g / l.
The distribution of the detergent in the laundry is completed at a concentration significantly lower than the concentration that existed at the beginning when the detergent was supplied to the tank, which reduces the effectiveness of the detergent when removing any stains from the laundry being washed.
The present invention seeks to optimize the use of detergent on an erasable fabric starting from the first stage of a machine cycle, i.e. when the detergent dissolves in the compartment for it in a relatively small amount of water, and recirculates until its concentration in the liquid is relatively higher than the concentration in the subsequent washing steps in the machine.
The solution to this problem is defined in one or more paragraphs of the attached claims.
The washing machine with enhanced activation of the detergent in accordance with the present invention is hereinafter described in detail with reference to the accompanying drawings, given for illustration and not restrictive, in which:
- figure 1 shows a schematic view of the tank and drum of a washing machine in accordance with the present invention, with a compartment for detergent and the main hydraulic connections for recirculating liquid;
- figure 2 shows a view in section of a detail of the machine of figure 1; and
- figure 3 shows an additional view of the details of figure 2.
In the attached drawings, the number 1 denotes a washing machine with enhanced detergent activation in accordance with the present invention.
The machine 1 comprises a washing tub 2, comprising a drum 3 for laundry to be washed, which is designed to rotate about an axis X of rotation. The electric motor 4 (shown schematically in the drawings) is operatively connected to the drum 3 to provide rotation around the X axis. The drum 3 is mounted on the machine frame 1a in the usual way and can rotate at different speeds and in different directions, which is typical for a washing machine. The drum 3, as a rule, has a cylindrical wall with through holes 3b and ribs 3c to provide movement of linen, similar to orbital, and to distribute the load of linen during rotation of the drum.
Detergent compartment 5, into which a dose of detergent in the form of a powder, tablet or liquid is loaded, is fluidly connected to a source of liquid, preferably tap water, through a supply pipe 6. A supply pipe 7 passes between the detergent compartment 5 and the tank 2 to supply a mixture of liquid and detergent to the tank 2.
The drum 3 and the tank 2 have corresponding openings 3a, 2a for loading into the machine and removing laundry from it. The holes 2a, 3a interact with a door 8 pivotally connected to the frame 1a of the machine to open and close it, and, respectively, open and close the holes 2a, 3a.
To prevent the penetration of fluid between the door 8 and the tank 2 between the structure 1A and the tank 2 is an elastic coupling 9. An elastic coupling (see figure 2) acts between the door 8 and the tank 2, so that if the door is closed, it is sealed to the elastic coupling 9. The elastic coupling 9 is provided with a series of rings, ensuring its correspondence to the opening 2a of the tank 2, thereby guaranteeing the necessary tightness in the fluid.
A recirculation loop 10 is located between the lower region of the tank 2 and a plurality of injection nozzles 11 directed inside the drum 3, for draining the liquid from the lower part of the tank 2 and re-supplying it to the drum 3.
The recirculation loop 10 includes a waste pipe 12 extending from the lower region of the tank 2 to a fluid collection tank 13 and to a pump 14 fluidly coupled to the tank 13 to divert the fluid and supply it to a supply pipe 15 passing between the pump 14 by injection nozzles 11. The recirculation pump 14 is additionally equipped with a conventional type filter 14a to hold solids (buttons, coins, etc.) from the tank 2 and prevent them from re-entering the drum 3. The drain pump 20 is fluidly coupled with the reservoir 13 and with the drain tube 21. The circulation pump 14 is constantly filled with the liquid (due to fluid communication with the reservoir 13). The recirculation pump 14 and the drain pump 20 operate alternately, which means that they never work at the same time. In particular, when the recirculation pump 14 operates to supply fluid back to the drum 3, the drain pump 20 is inactive, while the drain pump 20 is operable to drain the fluid, the recirculation pump 14 is inactive. In the embodiment shown in FIG. 1, the recirculation pump 14 and the drain pump 20 are shown for simplicity as being combined in one housing, but these two pumps can also be implemented in different casings.
The nozzles 11 are arranged in such a way that the projection of the pressure directions E in the vertical plane containing the X axis of rotation of the drum 3 is inclined at an angle A lying in the range from 30 ° to 80 °, preferably from 40 ° to 60 °, most preferably about 50 ° from the axis X of rotation of the drum 3 (see figure 2, which shows a section of an elastic coupling along a plane passing through the center of the drum and one of the nozzles). The projections of the pressure directions E onto a plane perpendicular to the axis X of rotation of the drum 3 (i.e., the plane essentially containing the door 8) practically converge at a point located in the central region of the drum 3.
Thus, the nozzles 11 spray liquid toward the center and deep into the drum 3. It should be noted that the term “pressure direction”, referring to nozzles, is intended to mean the bisector of the angle of the nozzle jet. Such a jet has a spray angle in the range of 10 ° to 30 °, preferably about 20 °.
Preferably, the nozzles 11 are made directly in the elastic sleeve 9. In particular, the nozzles 11 are made in the ring of the flexible sleeve 9. The nozzles 11 are arranged in two rows 11a of nozzles, each of which includes a plurality of nozzles 11. Preferably, each row 11a of nozzles 11 contains four nozzles. Two rows of nozzles are arranged symmetrically with respect to the vertical axis passing through the center of the drum 3. In particular, each row 11a of nozzles 11 is located in the elastic sleeve 9 at an angular distance B lying in the range from 0 ° to 45 °, preferably about 15 °, from the horizontal axis X1 passing through the elastic sleeve 9, and located in a plane that passes through the center of the drum 3 (see figure 1). Two rows 11a of nozzles are located in half of the elastic sleeve 9, which faces the recirculation pump 14.
To form a series of nozzles 11a, the elastic coupling comprises an opening 16 through which the inside of the elastic coupling 9, i.e. the part facing the inside of the tank 2 is fluidly coupled to the outside of the elastic sleeve 9, i.e. with the side facing the medium external to the tank 2. On the inner side of the elastic sleeve 9 in each hole 16 there is a series of baffles 17, forming a series of channels 18 through which the recirculating fluid is supplied to the drum 3. The number of channels 18 is equal to the number of nozzles 11, while the number of partitions is one less than the number of channels (see figure 3, which shows a plan view of one part of the elastic coupling). For each row of nozzles, a connecting pipe 19 is provided on the outer part of the elastic sleeve 9, which is preferably integral with the flexible sleeve 9. The connecting pipe 19 interacts with the supply pipe 15, so that the recirculating fluid enters through the flexible sleeve 9 and is supplied to the drum 3. The supply pipe 15 has a Y-shape and contains an inlet connected to the recirculation pump 14, and two outlet openings, each of which is connected to the connecting pipe 19 in accordance It presents a number of nozzles.
In one embodiment of the invention, not shown here, there is provided a substantially curved manifold fluidly coupled to a recirculation loop, the nozzles being located on such a manifold. The collector is connected to at least one point of the elastic sleeve 9 and corresponds to its profile. The collector has the shape of a circle sector and extends along the elastic sleeve by approximately 270 °. Nozzles in the rows of nozzles are located along the length of the manifold.
The machine 1, in addition, contains a control and monitoring unit 22 (schematically shown in the attached drawings), which is functionally connected to a recirculation pump 14, a drainage pump 20 and an electric motor 4 for controlling their action.
In particular, the control unit 22 is designed to supply a predetermined amount of a mixture of liquid and detergent to the tank 2 and to recirculate this mixture for a period of time T by rotating the drum at a speed V, thus performing the stage of distribution and activation of the detergent on which the laundry gets wet. It should be noted that after time T, the control and monitoring unit 22 performs a normal washing cycle.
During time period T, a preliminary amount of water, about five liters, is forced into the compartment 5 containing the dose of detergent to dilute the detergent to a concentration of about 30 g / l.
During the recirculation of the liquid and the detergent, the drum 3 rotates at a speed V, typically between 75 rpm and 120 rpm, ensuring the distribution of the laundry inside the drum 3 and the separation of objects included in the load of the laundry to be washed.
By combining the rotation of the drum 3 with a speed of V and recirculation, the liquid with the detergent is distributed over the laundry, which is initially dry, and absorbs them, thereby reducing the amount of liquid available for recirculation.
In accordance with the present invention, during the distribution and activation of the detergent, i.e. during time T, the control and monitoring unit 22 provides an increase in the rotational speed of the drum 3 to a speed V1> KV by a time t less than time T, where K is a coefficient that is sufficient to cause at least a partial spin of the laundry under the influence of centrifugal force.
It should be noted that at least a partial spin of the laundry under the influence of centrifugal force requires that the drum 3 rotates at a speed that ensures that at least a portion of the liquid absorbed by the wet laundry is wrung out.
To this end, the gain K is a number greater than 2, not necessarily an integer. Preferably, the rotational speed of the drum is greater than 300 rpm.
In addition, as mentioned above, during time T, in particular during time t, the control unit 22 is designed to actuate the recirculation circuit 10 to irrigate the inside of the drum 3, and therefore, the laundry, by the recirculating liquid through a plurality of injection nozzles 11.
The time t is preferably in the range of 5 to 20 seconds. Preferably, during a time T during which recirculation to wet the laundry and distribution of detergent occurs, the drum 3 passes through a series of periods t1, t2, ... tn, during which the rotation speed increases to speed V1 and then drops back to speed V.
Preferably, the stages at which the speed of the drum is changed to a value of V1 can be brought together in time and form pairs, or can be spaced.
If they form pairs, the first stage can be performed at speed V1, and the next stage at speed V2, while the speeds V1 and V2 are different, although the condition is that both of them are greater than speed V, multiplied by a coefficient K greater than 2.
In particular, the speed V2 of the subsequent stage of rotation of the pair of stages may be lower than the speed V1 of the previous stage of rotation.
High-speed pulses imparted to the drum at the stage of detergent dissolution and liquid recirculation cause the laundry to spin, although for a limited time, thereby causing a partial return of the recirculated liquid. In addition, such high-speed pulses, having a higher speed than with the usual, orbital-like distribution of the laundry in the drum, cause a mechanical effect on the load of the laundry, which more effectively separates the objects forming it, thereby exposing the recirculated detergent to an increased fabric surface.
A plurality of nozzles 11 provides high uniformity and wetting efficiency of the laundry arranged in this way. This effect is enhanced by the specific design of the nozzles 11 and their location.
Due to the combined effect of multiple nozzles and high-speed pulses, the activity of the detergent on the laundry in the tank increases during the time when its concentration is higher than the concentration in the later stages of the washing cycle, thus providing benefits in terms of overall performance of the machine, including energy saving indicator.

Claims (13)

1. A washing machine with enhanced activation of a detergent, including a washing tub (2), comprising a drum (3) for loading laundry to be rotated around a rotation axis (X), a detergent compartment (5) connected by fluid with a fluid source, a supply pipe (7) located between the detergent compartment (5) and the tank (2) and designed to supply a mixture of liquid and detergent to the tank (2), a recirculation loop (10) located between the bottom the area of the tank (2) and many injection nozzles (11), directed inside the drum (3), designed to drain the liquid from the bottom of the tank (2) and re-supply it to the drum (3), a control and monitoring unit (22) configured to supply a predetermined amount of the mixture during distribution and activation of the detergent liquid and detergent into the tank (2) and recirculation of the mixture during time T during rotation of the drum (3) with a speed V, characterized in that the control and monitoring unit (22) is configured to increase the speed of rotation of the drum (3) in the period time T to speed and V1> KV for a time t shorter than time T, where K is a coefficient whose value is sufficient to cause at least partial spinning of the laundry under the influence of centrifugal force and actuation of the recirculation circuit (10) for the specified time t for irrigation of the inside of the drum (3) with a recirculating liquid through a plurality of injection nozzles (11), stationary relative to the tank (2), located along at least part of the drum (3) and having many pressure directions (E) towards the central region of the drum (3).
2. The machine according to claim 1, characterized in that the coefficient K is a number greater than 2, not necessarily an integer.
3. Machine according to claim 1, characterized in that the control and monitoring unit (22) is configured to provide at least a pair of increased rotational speeds of the drum (3) in a time period T, and the rotational speed V1> KV for the first increased speed is greater than the rotation speed V2> KV for the second increased speed.
4. The machine according to claim 1, characterized in that the rotation speed V1 is greater than 300 rpm.
5. Machine according to claim 1, characterized in that the projection of the pressure directions of the nozzles (11) on a vertical plane containing the axis X of rotation of the drum (3) is inclined to the axis X of rotation of the drum (3) at an angle A in the range from 30 ° to 80 °, preferably about 50 °.
6. Machine according to claim 1, characterized in that the drum (3) and the tank (2) contain respective holes (3a, 2a) for laundry, interacting with the door (8) to open and close these holes, and is impervious to fluid an elastic coupling located between the door (8) and the opening (2a) of the tank (2), and a plurality of nozzles (11) are made in the elastic coupling (9).
7. Machine according to claim 1, characterized in that the nozzles (11) are located in at least two rows (11a), each row (11a) containing many nozzles (11).
8. Machine according to claim 7, characterized in that the rows (11a) of nozzles (11) are located symmetrically with respect to the vertical axis passing through the center of the drum (3), with each row (11a) of nozzles (11) located in an elastic sleeve ( 9) at an angular distance (B) in the range from 0 ° to 45 °, preferably about 15 °, from the horizontal axis (X1) passing through the elastic sleeve (9) and located in the plane passing through the center of the drum (3).
9. Machine according to claim 7, characterized in that in each row (11a) of nozzles (11), the elastic coupling (9) comprises an opening (16) through which the side of the elastic coupling (9) facing the inside of the tank (2) is connected in fluid with the side of the elastic sleeve facing the medium external to the tank (2).
10. The machine according to p. 9, characterized in that in each hole (16) there are many partitions (17) that form many channels (18) through which the recirculating fluid is supplied to the drum (3), and the number of channels (18) equal to the number of nozzles (11).
11. Machine according to claim 10, characterized in that the number of partitions (17) is one less than the number of channels (18).
12. Machine according to claim 7, characterized in that the recirculation circuit (10) comprises a waste pipe (12), which is located between the lower part of the tank (2) and the storage tank (13), a recirculation pump (14) connected in fluid with a reservoir (13), and a supply pipe (15) located between the recirculation pump (14) and nozzles (11).
13. Machine according to claim 12, characterized in that the elastic coupling (9) comprises a connecting pipe (19) located in each row (11a) of nozzles and interacting with the supply pipe (15) for transmitting the recirculating fluid through the elastic coupling (9) ) and feeding it into the drum (3).
RU2013143056A 2012-10-09 2013-09-23 Machine for linen washing with improved detergent activation RU2635974C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20120425164 EP2719814A1 (en) 2012-10-09 2012-10-09 Laundry washing machine with enhanced detergent activation
EP12425164.6 2012-10-09

Publications (2)

Publication Number Publication Date
RU2013143056A RU2013143056A (en) 2015-03-27
RU2635974C2 true RU2635974C2 (en) 2017-11-17

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EP (1) EP2719814A1 (en)
CN (1) CN103774381A (en)
RU (1) RU2635974C2 (en)

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EP3309290B1 (en) * 2016-10-14 2019-03-20 Whirlpool Corporation Horizontal drum washing machine with washing liquid recirculation system
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CN110366617A (en) * 2016-12-28 2019-10-22 Lg电子株式会社 Washing machine
KR20180136099A (en) * 2017-06-14 2018-12-24 주식회사 대우전자 Wall mounted washing machine, and detergent case thereof
KR20190052995A (en) * 2017-11-09 2019-05-17 엘지전자 주식회사 Laundary treating apparatus
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KR20190137993A (en) * 2018-06-04 2019-12-12 엘지전자 주식회사 Washing machine with a conduit for supplying water to nozzles at gasket and manufacturing method of the conduit
CN110607661A (en) * 2018-06-15 2019-12-24 青岛海尔滚筒洗衣机有限公司 Drum washing machine and nozzle of washing machine
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CN110644191A (en) * 2018-06-27 2020-01-03 Lg电子株式会社 Washing machine
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RU2013143056A (en) 2015-03-27
CN103774381A (en) 2014-05-07

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