CN109898264B - Automatic putting control method and automatic putting device and washing machine - Google Patents
Automatic putting control method and automatic putting device and washing machine Download PDFInfo
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- CN109898264B CN109898264B CN201711295156.7A CN201711295156A CN109898264B CN 109898264 B CN109898264 B CN 109898264B CN 201711295156 A CN201711295156 A CN 201711295156A CN 109898264 B CN109898264 B CN 109898264B
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Abstract
The invention belongs to the field of clothes treatment devices, and particularly relates to an automatic putting control method. According to the automatic feeding control method, when a user selects automatic feeding, the washing machine controls whether to operate automatic feeding according to the detergent allowance in the automatic feeding device and the installation state of the automatic feeding device, and if the detergent allowance is insufficient or the automatic feeding device is not installed in place, an alarm is sent out and the automatic feeding is stopped. The automatic feeding control method can improve the accuracy and reliability of automatic feeding of the detergent. The invention also relates to an automatic putting device and a washing machine adopting the automatic putting control method.
Description
Technical Field
The invention belongs to the field of clothes treatment devices, and particularly relates to an automatic putting control method, an automatic putting device and a washing machine.
Background
At present, the automatic feeding device adopts a reed switch to detect the liquid level change of detergent, and measures whether the liquid level in the automatic feeding device is too low through magnetism, so that better effect is obtained, and the structure is relatively simple. However, when the automatic dispensing device (including the magnetic floating ball) is drawn out, the liquid level is detected, and the detergent is displayed to have a residual amount, so that whether the liquid level in the automatic dispensing device is high and the detergent residual amount is sufficient or whether the automatic dispensing device is drawn out and installed in place cannot be effectively judged, and the automatic dispensing of the detergent is difficult to reliably realize.
In view of the above, the present invention is specifically proposed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic feeding control method, an automatic feeding device and a washing machine.
The first purpose of the invention is to provide an automatic feeding control method, which can ensure that the automatic feeding of the detergent is more accurate and reliable, and avoid unnecessary wear of clothes caused by the failure of the feeding of the detergent.
In order to solve the technical problems, the invention adopts the technical scheme that:
an automatic feeding control method is characterized in that when a user selects automatic feeding, the washing machine detects the detergent allowance in an automatic feeding device and the installation state of the automatic feeding device to control whether automatic feeding is operated or not, and if the detergent allowance is insufficient or the automatic feeding device is not installed in place, an alarm is given out to stop automatic feeding.
According to one embodiment of the invention, the opening and closing of the electromagnetic switch are regulated and controlled according to the buoyancy of the magnetic element in the automatic feeding device according to the liquid level change of the detergent so as to judge whether the detergent residual quantity in the automatic feeding device is insufficient.
According to one embodiment of the invention, the reed switch and the flow detection device are combined to judge the installation state of the automatic dispensing device.
According to one implementation mode of the automatic feeding device, the magnetic floating ball is arranged inside the automatic feeding device, the reed pipes positioned below the magnetic floating ball are arranged outside the automatic feeding device, and if the reed pipes have magnetic actions, the residual quantity of the detergent is insufficient, an alarm is given out, and the automatic feeding is stopped;
and if the reed pipes do not have magnetic action, continuously judging whether the automatic throwing device is installed in place or not.
According to one embodiment of the invention, the detergent flow of the automatic feeding device is detected S1 to judge whether the automatic feeding device is installed in place, and S1 is the total outflow amount of detergent in a set time;
in one embodiment of the present invention, an automatic dispensing function is selected, clothes are weighed, the required detergent dispensing amount is measured as S, the flow limit value of the automatic dispensing device in place is set as a, and the error of a flow meter is set as B:
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
In an embodiment of the present invention, the automatic release control method includes the following steps:
the reed pipes have magnetic action and execute Step 3;
the reed pipes do not have magnetic actions and execute Step 4;
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
A second object of the present invention is to provide an automatic dispensing device.
The automatic throwing device comprises a shell and an accommodating chamber arranged in the shell, and is provided with a reed pipe and a flow detection device.
According to one embodiment of the invention, a magnetic floating ball is arranged inside the accommodating chamber, and a reed switch is arranged outside the accommodating chamber corresponding to the lower part of the magnetic floating ball;
the magnetic floating ball floats up and down along with the change of the liquid level in the accommodating chamber so as to control the opening and closing of the reed pipe;
the water feeding and discharging channel of the detergent is provided with a flow detection device which detects the flow of the detergent in real time to judge whether the accommodating chamber is installed in place.
A third object of the present invention is to provide a washing machine.
The washing machine adopts any one automatic feeding control method according to the contents and is provided with any one automatic feeding device.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
in the automatic putting control method in the prior art, when the reed switch does not generate magnetic action, the liquid level of the detergent is judged to be normal, automatic putting is carried out, the special condition that the automatic putting device is not installed in place cannot be effectively judged, and the defects and disadvantages that the automatic putting of the detergent fails exist.
The automatic feeding control method of the invention comprehensively considers the factors of the liquid level change of the detergent and the installation state of the automatic feeding device, can accurately judge whether the detergent exists or not, and can also judge whether the automatic feeding device is installed in place or not, thereby ensuring that the automatic feeding of the detergent is more accurate, effective and reliable. The automatic putting control method has simple program, does not need to set a complex device and has low operation cost.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic flow chart of an automatic delivery control method according to the present invention;
fig. 2 is a schematic structural diagram of the automatic dispensing device according to the present invention.
The drawing is marked with:
1. a housing; 2. a softener chamber; 3. a magnetic floating ball; 4. a reed switch; 5. a washing liquid receiving chamber; 6. throwing water into a water channel; 7. a flow meter.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
An automatic feeding control method is characterized in that when a user selects automatic feeding, the washing machine detects the detergent allowance in an automatic feeding device and the installation state of the automatic feeding device to control whether automatic feeding is operated or not, and if the detergent allowance is insufficient or the automatic feeding device is not installed in place, an alarm is given out to stop automatic feeding.
According to one embodiment of the invention, the opening and closing of the electromagnetic switch are regulated and controlled according to the buoyancy of the magnetic element in the automatic feeding device according to the liquid level change of the detergent so as to judge whether the detergent residual quantity in the automatic feeding device is insufficient.
In one embodiment of the invention, the reed switch 4 is combined with a flow detection device to judge the installation state of the automatic dispensing device.
The flow detection means may be a flow meter 7.
According to one implementation mode of the automatic feeding device, the magnetic floating ball 3 is arranged inside the automatic feeding device, the reed pipes 4 positioned below the magnetic floating ball 3 are arranged outside the automatic feeding device, and if the reed pipes 4 have magnetic actions, the residual quantity of the detergent is insufficient, an alarm is given out, and the automatic feeding is stopped;
and if the reed pipes 4 do not have magnetic action, the automatic throwing device is continuously judged whether to be installed in place.
In one embodiment of the present invention, the detergent flow rate of the automatic dispensing device is detected S1 to determine whether the automatic dispensing device is mounted in place, and S1 is the total amount of detergent flowing out within a predetermined time.
In one embodiment of the present invention, an automatic dispensing function is selected, clothes are weighed, the required detergent dispensing amount is measured as S, the flow limit value of the automatic dispensing device in place is set as a, and the error of a flow meter is set as B:
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
In an embodiment of the present invention, the automatic release control method specifically includes the following steps:
the reed pipes 4 have magnetic actions and execute Step 3;
the reed pipes 4 do not have magnetic action and execute Step 4;
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
The second purpose of the invention is to provide an automatic dispensing device, which comprises a shell 1 and a containing chamber arranged in the shell 1, wherein the shell is provided with a reed pipe 4 and a flow detection device.
According to one embodiment of the invention, a magnetic floating ball 3 is arranged in the accommodating chamber, and a reed switch 4 is arranged outside the accommodating chamber corresponding to the lower part of the magnetic floating ball 3;
the magnetic floating ball 3 floats up and down along with the liquid level change in the accommodating chamber so as to control the opening and closing of the reed pipe 4;
the water supply and drainage channel 6 of the detergent is provided with a flow detection device which detects the flow of the detergent in real time to judge whether the accommodating chamber is installed in place.
A third object of the present invention is to provide a washing machine having the above automatic dispensing device, which employs the above automatic dispensing control method.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
in the automatic putting control method in the prior art, when the reed switch does not generate magnetic action, the liquid level of the detergent is judged to be normal, automatic putting is carried out, the special condition that the automatic putting device is not installed in place cannot be effectively judged, and the defects and disadvantages that the automatic putting of the detergent fails exist.
The automatic feeding control method of the invention comprehensively considers the factors of the liquid level change of the detergent and the installation state of the automatic feeding device, can accurately judge whether the detergent exists or not, and can also judge whether the automatic feeding device is installed in place or not, thereby ensuring that the automatic feeding of the detergent is more accurate, effective and reliable. The automatic release control method has simple program, does not need to set a complex device and has low operation cost.
Example two
An automatic feeding control method is characterized in that when a user selects automatic feeding, a washing machine judges the detergent allowance in an automatic feeding device and the installation state of the automatic feeding device to control whether automatic feeding is operated or not, and if the detergent allowance is insufficient or the automatic feeding device is not installed in place, an alarm is sent out to stop automatic feeding.
In one embodiment of the invention, the opening and closing of the electromagnetic switch are regulated and controlled according to the buoyancy of the magnetic element in the automatic feeding device according to the liquid level change of the detergent so as to judge whether the detergent residual quantity in the automatic feeding device is insufficient.
The magnetic element can be a magnetic floating ball or a magnetic floating block and can float in the detergent.
The electromagnetic switch is closed when the magnetic element is close, and is opened when the magnetic element is far away.
In one embodiment of the invention, a magnetic floating ball 3 is arranged in the automatic feeding device, reed pipes 4 positioned below the magnetic floating ball 3 are arranged outside the automatic feeding device, and if the reed pipes 4 have magnetic actions, the residual quantity of the detergent is insufficient, an alarm is given out, and the automatic feeding is stopped;
and if the reed pipes 4 do not have magnetic actions, whether the automatic throwing device is installed in place or not is continuously judged.
In one embodiment of the invention, the detergent flow rate of the automatic feeding device is detected S1 to judge whether the automatic feeding device is installed in place;
preferably, the automatic putting function is selected, the clothes are weighed, the required detergent putting amount is measured to be S, and the flow limit value of the automatic putting device in place is set to be A.
In one embodiment of the invention, if S1 is less than or equal to A, the automatic feeding device is judged not to be installed in place, an alarm is sent out, and the automatic feeding is stopped.
In one embodiment of the invention, if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, the flow detection is judged to be wrong, an alarm is given out, and automatic feeding is stopped.
In one embodiment of the invention, if S-B < S1 < S + B, automatic feeding is executed and the washing program continues to be executed.
A second object of the present invention is to provide an automatic dispensing device.
The automatic throwing device comprises a shell 1 and a containing cavity arranged in the shell 1, wherein a magnetic floating ball 3 is arranged in the containing cavity, and a reed switch 4 is arranged outside the containing cavity corresponding to the lower part of the magnetic floating ball 3;
the magnetic floating ball 3 floats up and down along with the liquid level change in the accommodating chamber so as to control the opening and closing of the reed pipe 4;
the water supply and drainage channel 6 of the detergent is provided with a flow detection device which detects the flow of the detergent in real time to judge whether the accommodating chamber is installed in place.
The working principle of the automatic releasing device is as follows: the magnetic floating ball 3 floats up and down in the accommodating chamber along with the liquid level change of liquid contained in the accommodating chamber. When the liquid level is lower, the magnetic floating ball 3 is close to the reed pipe 4, so that the reed pipe 4 is closed; when the liquid level is higher, the magnetic floating ball 3 is far away from the reed pipe 4, so that the reed pipe 4 is disconnected. According to different changes of the liquid level, the reed switch 4 makes different responses and sends different signals to a control system of the washing machine, so that a basis is provided for judging the height of the liquid level.
The throwing-off water channel 6 is provided with a flow detection device, the flow detection device detects the flow data of the detergent in the accommodating cavity in real time and sends the flow data to a control system of the washing machine, the control system judges whether the accommodating cavity is drawn out or not by combining the state of the reed switch 4, if the accommodating cavity is drawn out, the automatic throwing-in device is not installed in place, an alarm is sent out, and a user is reminded to check the automatic throwing-in device.
A third object of the present invention is to provide a washing machine.
The washing machine adopts any one automatic putting control method according to the contents and is provided with the automatic putting device.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
in the automatic feeding control method in the prior art, when the reed switch 4 does not generate magnetic action, the liquid level of the detergent is judged to be normal, automatic feeding is carried out, the special condition that the automatic feeding device is not installed in place cannot be effectively judged, and the defects and disadvantages that the automatic feeding of the detergent fails exist.
The automatic feeding control method of the invention comprehensively considers the factors of the liquid level change of the detergent and the installation state of the automatic feeding device, can accurately judge whether the detergent exists or not, and can also judge whether the automatic feeding device is installed in place or not, thereby ensuring that the automatic feeding of the detergent is more accurate, effective and reliable. The automatic release control method has simple program, does not need to set a complex device and has low operation cost.
EXAMPLE III
This embodiment is a more detailed embodiment.
As a more specific embodiment of the technical solution of the present invention, referring to fig. 1, the automatic release control method includes the following steps:
the reed pipes 4 have magnetic actions and execute Step 3;
the reed pipes 4 do not have magnetic action and execute Step 4;
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
A second object of the present invention is to provide an automatic dispensing device.
The automatic throwing device comprises a shell 1 and a containing cavity arranged in the shell 1, wherein a magnetic floating ball 3 is arranged in the containing cavity, and a reed switch 4 is arranged outside the containing cavity corresponding to the lower part of the magnetic floating ball 3;
the magnetic floating ball 3 floats up and down along with the change of the liquid level in the accommodating chamber so as to control the opening and closing of the reed switch 4;
the water supply and discharge road 6 of the detergent is provided with a flow detection device which detects the flow of the detergent in real time to judge whether the accommodating chamber is installed in place.
Fig. 2 is a schematic structural diagram of the automatic dispensing device of the present embodiment.
The automatic throwing device comprises a shell 1 and an accommodating chamber arranged in the shell 1, wherein the accommodating chamber is divided into two small chambers, namely a softener chamber 2 and a washing liquid accommodating chamber 5, a magnetic floating ball 3 is respectively arranged in the two small chambers, and a reed switch 4 is respectively arranged at the bottom of each small chamber. The magnetic floating ball 3 floats up and down in each cavity along with the liquid level change of liquid contained in each cavity. When the liquid level is lower, the magnetic floating ball 3 is close to the reed pipe 4, so that the reed pipe 4 is closed; when the liquid level is higher, the magnetic floating ball 3 is far away from the reed pipe 4, so that the reed pipe 4 is disconnected. According to the change of the liquid level, the reed switch 4 makes different responses and sends different signals to a control system of the washing machine, thereby providing a basis for judging the height of the liquid level.
The detergent feeding and discharging water channel 6 is provided with a flow detection device which is a flowmeter 7. The flow meter 7 detects flow data of liquid in the softener chamber 2 or the washing liquid accommodating chamber 5 in real time and sends the flow data to the control system, and the control system judges whether the softener chamber 2 or the washing liquid accommodating chamber 5 is drawn out or not by combining the state of the reed switch 4.
Of course, more than one reed switch 4 may be provided, such as multiple reed switches 4 on a single detection circuit below the receiving chamber.
A third object of the present invention is to provide a washing machine.
The washing machine adopts any one automatic putting control method according to the contents and is provided with the automatic putting device.
The automatic release control method of the invention can also be applied to other similar devices requiring automatic release, and can be simply changed and utilized by a person skilled in the art.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An automatic putting control method is characterized in that a user selects automatic putting, a washing machine detects the detergent allowance in an automatic putting device and the installation state of the automatic putting device to control whether to operate automatic putting, and if the detergent allowance is insufficient or the automatic putting device is not installed in place, an alarm is given out to stop automatic putting;
detecting the detergent flow rate of the automatic feeding device S1 to judge whether the automatic feeding device is installed in place, wherein S1 is the total outflow amount of detergent in a set time;
selecting an automatic putting function, weighing clothes, measuring the putting amount of required detergent as S, setting the flow limit value of the automatic putting device in place as A, and setting the error of a flowmeter as B:
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
2. The automatic putting control method according to claim 1, wherein the opening and closing of the electromagnetic switch is controlled according to the buoyancy of the magnetic element in the automatic putting device according to the liquid level change of the detergent so as to judge whether the detergent residual quantity in the automatic putting device is insufficient.
3. The automatic dispensing control method according to claim 2, characterized in that the state of installation of the automatic dispensing device is judged by a combination of the reed switch (4) and the flow rate detection device.
4. The automatic throwing control method according to claim 3, characterized in that a magnetic floating ball (3) is arranged inside the automatic throwing device, a reed switch (4) positioned below the magnetic floating ball (3) is arranged outside the automatic throwing device, and if the reed switches (4) have magnetic action, the residual amount of the detergent is insufficient, an alarm is given out, and the automatic throwing is stopped;
and if the reed pipes (4) do not have magnetic action, the automatic throwing device is continuously judged whether to be installed in place.
5. The automatic placement control method according to any one of claims 1 to 4, characterized by comprising the steps of:
step 1, selecting an automatic putting function by a user, weighing by the washing machine and measuring the putting quantity S of the detergent needed by the clothes;
step 2, judging the state of the reed switch (4) outside the automatic throwing device:
the reed pipes (4) have magnetic actions and execute Step 3;
the reed pipes (4) do no magnetic action and execute Step 4;
step 3, judging that the residual quantity of the detergent is insufficient, giving an alarm and stopping automatic feeding;
step 4, detecting the detergent flow rate of the automatic feeding device S1, wherein S1 is the total outflow amount of detergent in a predetermined time, the flow limit value of the automatic feeding device in place is A, and the error of the flow detection device is set as B:
if S1 is less than or equal to A, judging that the automatic feeding device is not installed in place, giving an alarm and stopping automatic feeding;
if A is more than S1 and less than or equal to S-B or S1 and more than or equal to S + B, judging that the flow detection is wrong, giving an alarm and stopping automatic feeding;
if S-B is less than S1 and less than S + B, automatic feeding is executed, and the washing program is continuously executed.
6. An automatic dispensing device comprising a housing (1) and a receiving chamber disposed in the housing (1), characterized in that a reed switch (4) and a flow rate detecting device are provided by the automatic dispensing control method according to any one of claims 1 to 5.
7. The automatic dispensing device according to claim 6, characterized in that a magnetic float ball (3) is provided inside the containing chamber, and a reed switch (4) is provided outside the containing chamber corresponding to the lower part of the magnetic float ball (3);
the magnetic floating ball (3) floats up and down along with the change of the liquid level in the accommodating chamber so as to control the opening and closing of the reed switch (4);
the water feeding and discharging channel (6) of the detergent is provided with a flow detection device which detects the flow of the detergent in real time to judge whether the accommodating chamber is installed in place.
8. A washing machine characterized by having the automatic dispensing device of claim 6 or 7 by using the automatic dispensing control method according to any one of claims 1 to 5.
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| CN110699928A (en) * | 2019-11-14 | 2020-01-17 | 珠海格力电器股份有限公司 | Detergent box, automatic feeding device, washing machine and automatic feeding method thereof |
| CN111560736B (en) * | 2020-04-09 | 2021-05-28 | 珠海格力电器股份有限公司 | Installation detection method and device for drawer type intelligent detergent box and washing machine |
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| US20080256721A1 (en) * | 2007-04-20 | 2008-10-23 | Lg Electronics Inc. | Detergent box opening and closing detecting apparatus of washing machine and method for controlling washing machine having the same |
| CN103757861A (en) * | 2014-02-11 | 2014-04-30 | 惠而浦(中国)投资有限公司 | Washing machine detergent automatic put system with spray and put function |
| US20170204552A1 (en) * | 2016-01-15 | 2017-07-20 | General Electric Company | Dispenser Box with Integral Water Inlet |
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Effective date of registration: 20220728 Address after: Room 221, Sino German Ecological Park Management Committee, No. 2877, Tuanjie Road, Huangdao District, Qingdao, Shandong 266500 Applicant after: QINGDAO HAIER WASHING ELECTRIC APPLIANCES Co.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. |
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