WO2019214514A1

WO2019214514A1 - Drum washing machine and spraying control method therefor

Info

Publication number: WO2019214514A1
Application number: PCT/CN2019/085248
Authority: WO
Inventors: 赵志强; 吕佩师; 许升
Original assignee: 青岛海尔滚筒洗衣机有限公司
Priority date: 2018-05-10
Filing date: 2019-04-30
Publication date: 2019-11-14
Also published as: CN110468554A; CN110468554B

Abstract

Disclosed are a drum washing machine and a spraying control method therefor. The drum washing machine comprises a box (1), an outer barrel (2) fixedly arranged in the box (1), an inner barrel (3) pivotally arranged in the outer barrel (2), a plurality of nozzles (9) arranged near the front end of the outer barrel (2), a circulating pump (6) for pumping washing water in the outer barrel (2) to the plurality of nozzles (9), and a circulating motor in driving connection with the circulating pump (6). The spraying control method comprises the following steps: adjusting the rotational speed of the circulating motor; and operating the circulating motor according to the adjusted rotational speed such that the plurality of nozzles (9) provide the washing water with a lifting distance corresponding to the rotational speed of the circulating motor so as to spray the watching water into the inner barrel (3). The drum washing machine and the spraying control method therefor optimize the spraying effect of the drum washing machine.

Description

Drum washing machine and spray control method thereof

Technical field

The invention belongs to the field of household appliances, and particularly provides a drum washing machine and a spray control method thereof.

Background technique

The existing drum washing machine originates from Europe, and mainly includes a box body, an outer tube and an inner tube from the outside to the inside. The working principle of the drum washing machine is similar to that of the hammer hammer hitting the clothes. When working, the inner cylinder rotates under the driving of the driving motor. As the inner cylinder rotates, the laundry is continuously lifted and lowered in the drum, and then lifted and then dropped, and repeated motion is performed. The clothes are washed cleaned by the combination of washing powder and water.

In order to improve the effect of water flushing and rinsing, some drum washing machines are also provided with a circulating spray device. A drum type washing machine disclosed in the patent document of the publication No. CN102482834B, in which a circulation path is provided, one end of the circulation path leads to a bottom end of a water tank (outer tube), and the other end of the circulation path leads to a water tank opening A plurality of discharge ports at the edge, and a circulation pump is disposed in the middle of the circulation path. When the circulation pump is in operation, the washing water can be supplied from the bottom end of the water tank to the plurality of discharge ports through a circulation path, and the plurality of discharge ports simultaneously spray the washing water into the drum (inner cylinder) to circulate the laundry.

However, the drum type washing machine disclosed in the patent document of the publication No. CN102482834B has a single spray mode, and has a poor spray effect on clothes.

Accordingly, there is a need in the art for a new solution to the above problems.

Summary of the invention

In order to solve the above problems in the prior art, in order to solve the problem that the spray effect of the existing drum washing machine having the circulating spray function is poor, the present invention provides a spray control method of the drum washing machine, the drum washing machine a casing, an outer cylinder fixedly disposed in the casing, an inner cylinder pivotally disposed in the outer cylinder, and a plurality of nozzles disposed near a front end of the outer cylinder for being used in the outer cylinder a washing water pump is sent to the circulation pump of the plurality of nozzles and a circulation motor drivingly connected to the circulation pump; the spray control method comprises the following steps:

Adjusting the rotational speed of the circulating motor;

The circulation motor is operated at an adjusted rotation speed to cause the plurality of nozzles to provide a wash water with a head corresponding to the rotation speed of the circulation motor, so that wash water is sprayed into the inner cylinder.

In a preferred embodiment of the above spray control method, the step of "adjusting the rotational speed of the circulating motor" further includes:

Increasing the rotational speed of the circulating motor;

When the rotational speed of the circulating motor rises to a highest threshold, the rotational speed of the circulating motor is gradually decreased;

When the rotational speed of the circulating motor is reduced to a minimum threshold, the rotational speed of the circulating motor is gradually increased again.

The cycle motor is intermittently powered down and turned on.

In a preferred embodiment of the above spray control method, the cycle time of the cycle motor is less than 40 seconds; and/or the on time of the cycle motor is less than 80 seconds.

In a preferred embodiment of the above spray control method, the cycle time of the cycle motor is less than 20 seconds; and/or the on time of the cycle motor is less than 60 seconds.

In a preferred embodiment of the above spray control method, before the step of "adjusting the rotational speed of the circulating motor", the spray control method further comprises: energizing the circulating motor.

In a preferred embodiment of the above spray control method, the plurality of nozzles are disposed at equal intervals along the circumferential direction of the outer cylinder on the outer cylinder, the door body of the drum washing machine, or the sealing window mat.

In a preferred embodiment of the above spray control method, the drum washing machine further includes an annular cavity including a water inlet communicating with the water outlet of the circulation pump and a plurality of nozzles respectively communicating with the plurality of nozzles a water outlet.

In a preferred embodiment of the above spray control method, the drum washing machine further includes a control valve, and the circulation pump is respectively connected to the plurality of nozzles through the control valve to selectively distribute the wash water to the plurality of One or more of the nozzles.

Furthermore, the present invention provides a drum washing machine comprising a controller for performing the steps of any one of the preferred embodiments of the spray control method described above.

It will be understood by those skilled in the art that in the preferred embodiment of the present invention, a plurality of nozzles can be sprayed with different heads of washing water by adjusting the rotational speed of the circulating motor. When the rotational speed of the circulating motor is gradually increased, the position where the washing water sprayed by the plurality of nozzles falls into the inner cylinder gradually transitions from the front end of the inner cylinder to the rear end of the inner cylinder; when the rotational speed of the circulating motor is gradually decreased, the washing of the plurality of nozzles is performed. The position where the water falls into the inner cylinder gradually transitions from the rear end of the inner cylinder to the front end of the inner cylinder. Therefore, the spray control method of the present invention enables a plurality of nozzles to spray wash water to different positions in the inner cylinder, optimizing the spray effect of the drum washing machine.

DRAWINGS

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in which:

Figure 1 is a cross-sectional view of a drum washing machine of the present invention;

Figure 2 is a flow chart showing the main steps of the spray control method of the present invention;

Figure 3 is a schematic view showing the first spray effect of the drum washing machine in the first embodiment of the present invention;

Figure 4 is a schematic view showing the second spraying effect of the drum washing machine in the first embodiment of the present invention;

Figure 5 is a schematic view showing the third spray effect of the drum washing machine in the first embodiment of the present invention;

Figure 6 is a schematic view showing the fourth spray effect of the drum washing machine in the first embodiment of the present invention;

Figure 7 is a schematic view showing the fifth spray effect of the drum washing machine in the first embodiment of the present invention;

Figure 8 is a schematic view showing the sixth shower effect of the drum washing machine in the first embodiment of the present invention.

List of reference signs:

1, the box body; 2, the outer tube; 3, the inner tube; 4, the door body; 5, the sealing window mat; 6, the circulation pump; 7, the outlet pipe; 8, the annular cavity; 9, the nozzle.

detailed description

It should be understood by those skilled in the art that the embodiments of the present invention are merely used to explain the technical principles of the present invention and are not intended to limit the scope of the present invention. For example, the spray control method of the present invention can be applied not only to a drum washing machine but also to a pulsator washing machine, and those skilled in the art can adjust it according to needs to adapt to a specific application, and the adjusted technical solution will still fall into the following. The scope of protection of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. The terminating direction or positional relationship is based on the orientation or positional relationship shown in the drawings, which is merely for convenience of description, and does not indicate or imply that the device or component must have a specific orientation, constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should also be noted that in the description of the present invention, the terms "installation", "connected", and "connected" are to be understood broadly, and may be, for example, a fixed connection or a The connection is disassembled or connected integrally; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

As shown in FIG. 1, the drum washing machine of the present invention mainly comprises a casing 1, an outer cylinder 2, an inner cylinder 3, a door body 4, a sealing window mat 5, a drain pump (not shown), and a drain pipe (not shown). show). The outer cylinder 2 is fixedly disposed in the casing 1, the inner cylinder 3 is rotatably disposed in the outer cylinder 2, and the sealing window mat 5 is disposed between the casing 1 and the outer cylinder 2. The drain pump and the drain pipe are both disposed in the tank body 1, and the water inlet of the drain pump is connected to the inner bottom of the outer cylinder 2, the water outlet of the drain pump is connected to one end of the drain pipe, and the other end of the drain pipe is open to the outside. The drain pump can discharge the washing water in the outer cylinder 2 through the drain pipe.

In addition, those skilled in the art can understand that when each part of the drain pipe is lower than the inner bottom end of the outer cylinder 2, the person skilled in the art can also omit the drain pump and replace the drain pump with the cut-off pump as needed. valve. When the drum washing machine needs to drain, the shut-off valve is opened, so that the washing water in the outer cylinder 2 is automatically discharged from the drain pipe by its own gravity.

Referring to FIG. 1 , the front end of the casing 1 (the right side of the casing 1 in FIG. 1 ) is provided with a tank mouth (not shown), and the front end of the outer cylinder 2 (the right side of the outer cylinder 2 in FIG. 1 ) is provided with The outer cylinder mouth (not shown), the front end of the inner cylinder 3 (the right side of the inner cylinder 3 in Fig. 1) is provided with an inner cylinder mouth (not shown). One end of the sealing window mat 5 is sealingly connected to the edge of the tank mouth, and the other end of the sealing window mat 5 is sealingly connected to the edge of the outer cylinder mouth. The door body 4 is pivotally disposed on the casing 1, and the door body can be closed when the door body 4 is closed to prevent the washing water in the outer cylinder 2 from overflowing from the tank body.

With continued reference to Fig. 1, the drum washing machine of the present invention further includes a circulation motor (not shown), a circulation pump 6, an outlet pipe 7, an annular chamber 8, and a plurality of nozzles 9. The circulating motor is drivingly connected to the circulating pump 6, and the circulating motor is used to drive the circulating pump 6 to rotate. The circulation pump 6 is preferably arranged in the housing 1 and is fixedly connected to the housing 1 . The water inlet of the circulation pump 6 passes through the inside of the outer cylinder 2, and preferably, the water inlet of the circulation pump 6 is connected to the bottom end of the outer cylinder 2 through an inlet pipe (not shown). Alternatively, the person skilled in the art can also connect the inlet pipe to any position of the outer cylinder 2 under the condition that the inlet pipe is located below the liquid level in the outer cylinder 2 as needed. The water outlet of the circulation pump 6 communicates with the water inlet of the annular chamber 8 through the outlet pipe 7. Alternatively, those skilled in the art can also omit the outlet pipe 7 as needed to directly connect the water outlet of the circulation pump 6 with the water inlet of the annular chamber 8.

With continued reference to FIG. 1, the annular chamber 8 is located within the housing 1 and is disposed around the sealing window mat 5. Preferably, the annular chamber 8 is fixedly connected to the tank 1 (for example the inner side wall of the tank 1). In addition, the person skilled in the art can also fixedly connect the annular cavity 8 with the outer cylinder 1 as needed. The annular chamber 8 includes a water inlet and a plurality of water outlets (not shown). The water inlet of the annular chamber 8 communicates with the circulation pump 6, and each of the water outlets of the annular chamber 8 communicates with a nozzle 9.

In operation, under the action of the circulation motor, the circulation pump 6 feeds the washing water pump in the outer cylinder 2 to the annular chamber 8, and then the annular chamber 8 delivers the washing water to the plurality of nozzles 9 through a plurality of water outlets. A plurality of nozzles 9 spray wash water into the inner cylinder 3 to wash the laundry. When the inner cylinder 3 is operated at a high speed, the water jetted from the nozzle 9 can quickly pass through the laundry and enter the outer cylinder 2 under the action of centrifugal force and gravity.

Although not explicitly shown in the drawings, a plurality of nozzles 9 are disposed on the sealing window mat 5 at equal intervals around the circumference of the outer cylinder 2. Alternatively, the skilled person can also provide a plurality of nozzles 9 on the sealing window mat 5 at different intervals as needed. Among them, all of the nozzles 9 pass through the sealing window mat 5 and are both sealedly connected to the sealing window mat 5 to prevent the washing water in the outer cylinder 2 from leaking.

Further, a person skilled in the art can also arrange a plurality of nozzles 9 at any position near the front end of the outer cylinder 2 as needed, for example, a plurality of nozzles 9 are disposed inside the door body 4, and a plurality of nozzles 9 are disposed at the outer cylinder mouth. At the edge.

As shown in Fig. 1, the water outlet of each of the nozzles 9 is directed to the inner cylinder 3 so that the washing water sprayed from the nozzles 9 can fall into the inner cylinder 3 to spray the laundry. Alternatively, a person skilled in the art can also make the nozzle 9 point to the door body 4 under the premise that a plurality of nozzles 9 can spray the washing water into the inner cylinder 3, and then wash the water by the reflection of the door body 4. Water is sprayed into the inner cylinder 3.

The spray control method of the present invention will be described in detail below with reference to Figs. 2 to 8.

As shown in FIG. 2, the spray control method of the present invention mainly comprises:

Step S100, adjusting the rotation speed of the cycle motor;

In step S200, the circulation motor is operated in accordance with the adjusted rotation speed so that the plurality of nozzles 9 supply the washing water with a head corresponding to the rotation speed of the circulation motor, thereby injecting the washing water into the inner cylinder 3.

Prior to step S100, the spray control method of the present invention further includes the step of energizing the cycle motor.

Based on the above steps, the present invention provides the following two embodiments.

In a first embodiment of the invention:

Step S100 further includes:

Step S111, the rotational speed of the circulating motor is gradually increased;

Step S112, when the rotational speed of the circulating motor rises to the highest threshold, the rotational speed of the circulating motor is gradually decreased;

In step S113, when the rotation speed of the cycle motor is lowered to the minimum threshold, the rotation speed of the cycle motor is gradually increased again.

Steps S111 to S113 are repeated.

The highest threshold value refers to the highest threshold value of the rotational speed of the circulating motor, which is mainly determined according to the upper limit of the rotational speed of the circulating motor and the upper limit of the rotational speed of the circulating pump 6. Therefore, those skilled in the art can obtain the highest threshold by experimental data, or the person skilled in the art can appropriately adjust the highest threshold of the rotational speed of the circulating motor according to actual needs, and set the highest threshold to any other feasible value.

Among them, the lowest threshold refers to the lowest threshold of the rotational speed of the cycle motor. The lowest threshold, that is, the minimum rotational speed of the cycle motor is the rotational speed at which the wash water sprayed by the nozzle 9 can just enter the inner cylinder 3. Alternatively, those skilled in the art can appropriately adjust the minimum threshold of the rotational speed of the circulating motor according to actual needs, and set the lowest threshold to any other feasible value.

Step S200 further includes:

Corresponding to step S111, as the rotational speed of the circulating motor gradually increases, the head of the sprayed water of the nozzle 9 gradually increases, and the landing point of the wash water gradually transitions from the front end of the inner cylinder 3 to the rear end of the inner cylinder 3.

Corresponding to step S112, as the rotation speed of the circulation motor gradually decreases, the head of the nozzle 9 injecting the washing water gradually decreases, and the landing point of the washing water gradually transitions from the rear end of the inner cylinder 3 to the front end of the inner cylinder 3.

The spray effect of the drum washing machine of the present invention will be described in detail below with reference to Figs. 3 to 8 .

In order to better explain the spray effect of the drum washing machine of the present invention, FIGS. 3 to 8 only show the spray effect of the lowermost nozzle 9.

As shown in FIG. 3, when the rotational speed of the cycle motor is at the lowest threshold, the nozzle 9 is just capable of injecting wash water into the inner cylinder 3, and the landing point of the wash water is at the front of the inner cylinder 3. In this case, those skilled in the art can also make only a few nozzles 9 under the drum washing machine to eject the washing water as needed.

As shown in FIG. 4, as the rotation speed of the circulation motor increases, the nozzle 9 sprays the wash water to the middle of the inner cylinder 3. In this case, those skilled in the art can also make only a few nozzles 9 and a few nozzles 9 in the middle of the drum washing machine to eject the washing water as needed.

As shown in Fig. 5, as the rotation speed of the cycle motor continues to rise, the nozzle 9 sprays the wash water to the rear of the inner cylinder 3. In this case, all of the nozzles 9 spray the washing water toward the inner cylinder 3.

As shown in Fig. 6, as the number of revolutions of the cycle motor continues to rise, the nozzle 9 sprays the wash water to a position below the bottom end of the inner cylinder 3.

As shown in Fig. 7, as the rotation speed of the cycle motor continues to rise, the nozzle 9 sprays the wash water to a position intermediate the bottom end of the inner cylinder 3.

As shown in Fig. 8, when the rotational speed of the circulating motor reaches the highest threshold, the nozzle 9 sprays the washing water to a position above the bottom end of the inner cylinder 3.

The process of reducing the rotational speed of the circulating motor from the highest threshold to the lowest threshold is opposite to the process shown in Figures 3 to 8 above, so that no further explanation will be given here.

Therefore, in the first embodiment, the present invention enables the plurality of nozzles 9 to eject the wash water of different heads by adjusting the number of revolutions of the cycle motor. When the rotational speed of the circulating motor is gradually increased, the position where the washing water sprayed by the plurality of nozzles 9 falls into the inner cylinder 3 gradually transitions from the front end of the inner cylinder 3 to the rear end of the inner cylinder 3; when the rotational speed of the circulating motor is gradually decreased, more The position where the washing water sprayed by the nozzles 9 falls into the inner cylinder 3 gradually transitions from the rear end of the inner cylinder 3 to the front end of the inner cylinder 3. Therefore, the spray control method of the present invention enables the plurality of nozzles 9 to spray the wash water to different positions in the inner cylinder 3, optimizing the spray effect of the drum washing machine.

In a second embodiment of the invention:

Step S100 further includes: intermittently powering down the cycle motor and turning it on.

Preferably, the cycle time of the cycle motor is not more than 40 seconds. More preferably, the cycle time of the cycle motor is made less than 20 seconds. In addition, those skilled in the art can also set the power-off duration of the cycle motor to any other value, such as 5S, 30S, 50S, etc., as needed.

Preferably, the on-time of the cycle motor is made no more than 80 seconds. More preferably, the on-time of the cycle motor is made less than 60 s. In addition, those skilled in the art can also set the on-time of the cycle motor to any other value, such as 30S, 50S, 70S, etc., as needed. It will be understood by those skilled in the art that since the detergent/powder has not been sufficiently dissolved into the washing water at the beginning of the operation of the drum washing machine, the energizing time of the circulating motor can be appropriately increased at the beginning of the operation of the drum washing machine (for example, 80S), the power-on time of the circulating motor is appropriately reduced (for example, set to 60S) after the drum washing machine has been running for a while.

Step S200 specifically includes: when the circulating motor is energized, the head of the washing water sprayed by the nozzle 9 rises from zero to a maximum value, and is then ejected to the bottom end of the inner cylinder 3. When the cycle motor is de-energized, the head of the wash water sprayed by the nozzle 9 is reduced from the maximum value to zero.

It will be understood by those skilled in the art that the second embodiment ejects the nozzle 9 by slowly changing the rotational speed of the circulating motor in the first embodiment by intermittently de-energizing the circulating motor and then turning it on. The head of the wash water changes more quickly.

In addition, it should be noted that the drum washing machine of the present invention includes the above-described controller, which is in communication connection with the cycle motor, and the controller can control the rotation speed of the cycle motor, or can control the cycle motor switching. Speed gear. Those skilled in the art can understand that the cycle motor of the present invention can be a DC motor, an AC motor, a servo motor or a stepper motor; the controller of the present invention can be a combination logic controller, a microprogram controller, and any other feasible Form controller.

Further, although not shown in the drawings, in another possible embodiment of the present invention, a person skilled in the art can provide a control valve between each of the nozzles 9 and the circulation pump 6 according to actual needs. The control valve is capable of selectively delivering wash water pumped by the circulation pump 6 to one or more of the plurality of nozzles 9. Illustratively, the control valve includes a plurality of shut-off valves, the inlet valve ports of each of the shut-off valves are in communication with the annular chamber 8, respectively, and the outlet valve ports of each of the shut-off valves are respectively in communication with a nozzle 9. Whether each nozzle 9 injects wash water is controlled by a separate shut-off valve.

Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims

A spray control method for a drum washing machine, the drum washing machine comprising a box body, an outer tube fixedly disposed in the box body, an inner tube pivotally disposed in the outer tube, and an outer tube disposed in the outer tube a plurality of nozzles near the front end, a circulation pump for feeding the washing water pump in the outer cylinder to the plurality of nozzles, and a circulation motor drivingly connected to the circulation pump;

The spraying control method comprises the following steps:

Adjusting the rotational speed of the circulating motor;

The circulation motor is operated at an adjusted rotation speed to cause the plurality of nozzles to provide a wash water with a head corresponding to the rotation speed of the circulation motor, thereby injecting wash water into the inner cylinder.
The spray control method of the drum washing machine according to claim 1, wherein the step of "adjusting the rotation speed of the cycle motor" further comprises:

Increasing the rotational speed of the circulating motor;

When the rotational speed of the circulating motor rises to a highest threshold, the rotational speed of the circulating motor is gradually decreased;

When the rotational speed of the circulating motor is reduced to a minimum threshold, the rotational speed of the circulating motor is gradually increased again.
The spray control method of the drum washing machine according to claim 1, wherein the step of "adjusting the rotation speed of the cycle motor" further comprises:

The cycle motor is intermittently powered down and turned on.
The spray control method of a drum washing machine according to claim 3, wherein a power-off time of the cycle motor is less than 40 seconds; and/or an on-time of the cycle motor is less than 80 seconds.
The spray control method of a drum washing machine according to claim 4, wherein a power-off time of the cycle motor is less than 20 seconds; and/or an on-time of the cycle motor is less than 60 seconds.
The spray control method of the drum washing machine according to any one of claims 1 to 5, wherein before the step of "adjusting the rotation speed of the cycle motor", the spray control method further comprises: The circulating motor is energized.
The spray control method of the drum washing machine according to any one of claims 1 to 5, wherein the plurality of nozzles are disposed at equal intervals in the circumferential direction of the outer cylinder at the outer cylinder, The door of the drum washing machine or the sealing window mat.
A spray control method for a drum washing machine according to any one of claims 1 to 5, wherein the drum washing machine further includes an annular chamber including a one that communicates with a water outlet of the circulation pump a water inlet and a plurality of water outlets respectively communicating with the plurality of nozzles.
The spray control method of the drum washing machine according to any one of claims 1 to 5, further comprising a control valve, wherein the circulation pump is separately coupled to the plurality of nozzles through the control valve to selectively The wash water is dispensed to one or more of the plurality of nozzles.
A drum washing machine comprising a controller, wherein the controller is for performing the spray control method according to any one of claims 1 to 9.