CN109780798A - Refrigerator - Google Patents
Refrigerator Download PDFInfo
- Publication number
- CN109780798A CN109780798A CN201811624730.3A CN201811624730A CN109780798A CN 109780798 A CN109780798 A CN 109780798A CN 201811624730 A CN201811624730 A CN 201811624730A CN 109780798 A CN109780798 A CN 109780798A
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- CN
- China
- Prior art keywords
- door body
- cabinet
- door
- spiral winding
- seal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 56
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005057 refrigeration Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000000875 corresponding effect Effects 0.000 description 6
- 230000008602 contraction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Refrigerator Housings (AREA)
Abstract
The present invention relates to field of refrigeration equipment more particularly to a kind of refrigerators.The refrigerator is provided with cabinet and the door body for seal case, and the door body includes the protruding portion being arranged towards the cabinet side and the door seal for surrounding and being fixed on the protruding portion, and in door body closure, the door seal is sealed between the door body and cabinet；The door seal inner hollow, the door body further include the spiral winding being embedded inside the door seal, and when the door body is closed, the spiral winding power-off expansion is so that door seal seals the refrigerator；When the door body when pulled, the spiral winding, which is powered, to be shunk to eliminate the frictional force between the door seal and the cabinet, to realize the adjusting of seal degree between door body and cabinet by power on/off, so that when door body is closed, door body is fitted closely with cabinet, to reduce loss of refrigeration capacity, energy consumption is reduced；When needing to open door body, control power-off can then open door body easily, and easy to operate, user's use feeling is promoted.
Description
Technical field
The present invention relates to field of refrigeration equipment more particularly to a kind of refrigerators.
Background technique
In existing refrigerator, the cold air of cabinet is exchanged with extraneous hot gas progress heat in order to prevent, usually in door body
Door seal is provided between cabinet；In order to improve the effect of door seal barrier heat exchange, when door body is closed, door body and cabinet are needed
Between being attached together tightly.
It is understood that in actual use, when refrigerator closed state, needs tightly close between door body and cabinet
Envelope is to reduce cooling capacity loss；Adsorption capacity when opening the door between door body and cabinet can then become the resistance for hindering door body to pull open, especially
For its crowd small for strength when opening large refrigerator, use feeling is poor harder, or even causes reaction force due to firmly opening the door
Cause unnecessary personal safety hidden danger.
Therefore it provides between a kind of adjustable door body and cabinet seal degree refrigerator, just become a kind of urgently to be resolved
The problem of.
Summary of the invention
In order to solve the above-mentioned technical problem, the invention proposes a kind of refrigerators.
To achieve the goals above, technical solution provided by the invention is as follows: a kind of refrigerator, and the refrigerator is provided with cabinet
With the door body for seal case, the door body includes the protruding portion being arranged towards the cabinet side and surround and be fixed on
The door seal of the protruding portion, in the case where door body closure, the door seal is sealed between the door body and cabinet；The door seal
Inner hollow, the door body further include the spiral winding being embedded inside the door seal, and the refrigerator further includes controlling the spiral shell
The control device of spin line circle power on/off；
When the door body is closed, the spiral winding power-off expansion is so that door seal seals the refrigerator；When the door
When pulled, the spiral winding is powered to be shunk to eliminate the frictional force between the door seal and the cabinet body.
As a further improvement of the present invention, the control device includes the switch being electrically connected with the spiral winding,
The switch includes being set to the door body close to the push switch of the cabinet side, and the cabinet is close to the door body
Side is provided with male member corresponding with the push switch；
When the male member presses the push switch, the spiral winding power-off；When the push switch and institute
When stating male member separation, the spiral winding is powered.
As a further improvement of the present invention, the switch further includes being set in the door body and opening with the push type
The handle connect is correlated, is additionally provided with the first back-moving spring connecting with the handle in the door body；
When the handle away from cabinet direction on when pulled, the first back-moving spring is compressed and the pressing
Formula switch is separated with the male member；
When the handle is released and the door body is closed, the first back-moving spring resets so that the male member presses
The push switch.
As a further improvement of the present invention, the handle is recessed inwardly close to the side of the cabinet and is formed with receiving
Chamber, the push switch are set in the accommodating chamber.
As a further improvement of the present invention, the spiral winding includes two terminals, and the push switch includes
Pressing piece and the contact jaw being electrically connected respectively with two terminals, the pressing piece are conductive material；
When the pressing piece and two contact end in contact, the spiral winding is powered；When the pressing piece and two
When a contact jaw separates, the spiral winding power-off.
As a further improvement of the present invention, the accommodating chamber is additionally provided with the second reset bullet of the connection pressing piece
Spring, when the pressing piece is pressed by the male member, the second back-moving spring is by compression and the pressing piece and two institutes
State contact jaw separation；
When the pressing piece is separated with the male member, the second back-moving spring resets so that the pressing piece and two
The contact end in contact.
As a further improvement of the present invention, cabinet outer edge side corresponding with the door seal is provided with iron
Piece.
As a further improvement of the present invention, the outer edge of the protruding portion is recessed inwardly to form fluted, the door
Envelope is fixedly installed in the groove.
As a further improvement of the present invention, the position that the box inside wall is in contact with door seal is both provided with dent,
The position that the door seal is in contact with box inside wall is both provided with dent.
As a further improvement of the present invention, the spiral winding surround for enameled wire and forms.
The beneficial effects of the present invention are: the invention proposes a kind of refrigerator, by surrounding and being fixed on the door in door body
It is embedded spiral winding in envelope, the spiral winding, which is powered, to be shunk, power-off expansion, so as to come in fact by simple power on/off
The adjusting of seal degree between existing door body and cabinet, so that door body is fitted closely with cabinet, to reduce cold when door body is closed
Amount loss, reduces energy consumption；When needing to open door body, control power-off can then open door body easily, easy to operate, user's use feeling
It is promoted；
It is in close state based on refrigerator in the most of the time, i.e. the spiral winding most of the time is in off-position, real
Show energy saving.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 closes for refrigerator door in the present invention, while the side view of handle not when pulled；
Fig. 2 closes for refrigerator door in the present invention, while the side view of handle when pulled；
Fig. 3 is the side view of refrigerator door opening state in the present invention；
Fig. 4 is the structural schematic diagram of spiral winding energization contraction state in door body in the present invention；
Fig. 5 is that spiral winding powers off the structural schematic diagram of swelling state in door body in the present invention；
Fig. 6 is structural schematic diagram of the control device under state described in Fig. 1 in the present invention；
Fig. 7 is the structural schematic diagram of male member and push switch cooperation in Fig. 6；
Fig. 8 is structural schematic diagram of the control device under state described in Fig. 2 in the present invention；
Fig. 9 is the structural schematic diagram of male member and push switch cooperation in Fig. 8；
Figure 10 is structural schematic diagram of the control device under state described in Fig. 3 in the present invention；
Figure 11 is the structural schematic diagram of male member and push switch cooperation in Figure 10；
Figure 12 is spiral winding operation principle schematic diagram in the present invention；
Wherein, 100 --- refrigerator, 1 --- cabinet, 10 --- male member, 2 --- door body, 20 --- protruding portion, 21 --- it is recessed
Slot, 30 --- door seal, 40 --- spiral winding, 41 --- terminals, 3 --- control device, 50 --- push switch,
51 --- pressing piece, 52 --- contact jaw, 60 --- handle, 61 --- accommodating chamber, 62 --- second back-moving spring, 70 --- the
One reset spring.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model of the application protection
It encloses.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can
, can also indirectly connected through an intermediary, for the ordinary skill in the art to be to be connected directly, it can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The mutual positional relationship of different components for ease of description is in normal in refrigerator in embodiments of the present invention
When the state used, the direction far from ground is that upward, the direction towards ground is downward；When user is towards door body, refrigerator
Direction towards user be it is facing forward, far from user direction be backwards；Correspondingly, then defining left and right directions.
As shown in Figures 1 to 12, the invention proposes a kind of refrigerator 100, the refrigerator 100 is provided with cabinet 1 and is used for
The door body 2 of seal case 1, here, there are many types of door body 2, such as: the side of door body 2 can be hinged to case
Body 1, i.e. door body 2 can be rotated along hinge, so as to realize the movement of enabling and shutdown；Door body 2 can be a refrigerator
The door body 2 of 100 drawers, to realize the work of enabling and shutdown by push-and-pull door body 2；
The door body 2 includes the protruding portion 20 being arranged towards 1 side of cabinet and surround and be fixed on the protrusion
The door seal 30 in portion 20, in the case where door body 2 is closed, the door seal 30 is sealed between the door body 2 and cabinet 1；The door
30 inner hollows are sealed, the door body 2 further includes the spiral winding 40 being embedded inside the door seal 30, and the refrigerator 100 also wraps
Include the control device 3 for controlling 40 power on/off of spiral winding；
When the door body 2 is closed, the power-off of spiral winding 40 expansion is so that door seal 30 seals the refrigerator 100；
When the door body 2 when pulled, the spiral winding 40, which is powered, to be shunk to eliminate rubbing between the door seal 30 and the cabinet 1
Wipe power；
Here, as shown in figure 12, spiral winding 40 can be interpreted as to the series connection of several annulus and formed, in spiral winding
40 when being powered, the sense of current in adjacent ring be it is identical, therefore, adjacent ring is formed by the direction in magnetic field also phase
Together, so that adjacent ring can attract each other, entire spiral winding 40 is caused to shrink；As shown in figure 4, making after being powered described
Spiral winding 40 is shunk, so that the corresponding flat contracting therewith of the door seal 30, so that door seal 30 is fitted closely from the cabinet 1
State become gap occur, then the frictional force between the door seal 30 and the cabinet 1 i.e. be not present, facilitate user easily
Door body 2 is opened, structure is simple and use feeling is promoted；
User at closing time, after door body 2 is pushed into closed state, controls the spiral winding 40 and power off, then spiral winding
40 expand so that the state that door seal 30 is restored and the cabinet 1 fits closely, realizes the sealing of refrigerator 100, to reduce cold
Amount loss, reduces energy consumption；
Meanwhile in the embodiment of the present invention, it is in close state based on refrigerator 100 in the most of the time, i.e. spiral winding 40
Most of the time is in off-position, realizes energy saving.
In the specific embodiment of the invention, as shown in Fig. 6 to Figure 11, the control device 3 includes and the helix
The switch that circle 40 is electrically connected, the switch include being set to the door body 2 close to the push switch of 1 side of cabinet
50, the cabinet 1 is provided with male member 10 corresponding with the push switch 50 close to the side of the door body 2；
When the male member 10 presses the push switch 50, the spiral winding 40 is powered off；When the push type is opened
When pass 50 is separated with the male member 10, the spiral winding 40 is powered；Here, the push switch 50 can be multiple types
, such as otherwise electronic type or mechanical is powered as long as can power off when pressed, then be all up mesh of the invention
's.
Specifically, the switch further includes the handle for being set in the door body 2 and connecting with the push switch 50
60, the first back-moving spring 70 connecting with the handle 60 is additionally provided in the door body 2；
When the handle 60 away from cabinet 1 direction on when pulled, the first back-moving spring 70 is compressed and institute
Push switch 50 is stated to separate with the male member 10；
When the handle 60 is released and the door body 2 is closed, the first back-moving spring 70 resets so that described convex
Part 10 presses the push switch 50；Here, user is when opening door body 2, it is only necessary to gently drive the handle 60 so that
The push switch 50 is separated with male member 10, then the spiral winding 40, which is powered, shrinks and can easily open door body 2, structure
Simply, it operates conveniently.
Preferably, the handle 60 is recessed inwardly close to the side of the cabinet 1 and is formed with accommodating chamber 61, the push type
Switch 50 is set in the accommodating chamber 61, and the spiral winding 40 includes two terminals 41, and the push switch 50 wraps
The contact jaw 52 for including pressing piece 51 and being electrically connected respectively with two terminals 41, the pressing piece 51 are conductive material；
When the pressing piece 51 and two contact jaws 52 contact, the spiral winding 40 is powered；When the pressing
When part 51 is separated with two contact jaws 52, the spiral winding 40 is powered off.
Further, the accommodating chamber 61 is additionally provided with the second back-moving spring 62 for connecting the pressing piece 51, when described
When pressing piece 51 is pressed by the male member 10, the second back-moving spring 62 compressed and the pressing piece 51 and two described in
Contact jaw 52 separates；
When the pressing piece 51 is separated with the male member 10, the second back-moving spring 62 resets so that the pressing piece
51 contact with two contact jaws 52；Here, when the door body 2 is opened, since second back-moving spring 62 resets, then spiral shell
Spin line circle 40 is energization contraction state, is then needing to close door body 2 and is realizing that sealing state is then easier, due to the door seal
30 be contraction state, can easily by the door body 2 be pushed into at 1 closure of cabinet, at this point, described in the male member 10 just presses
Pressing piece 51, the power-off expansion of spiral winding 40, completes the sealing to the refrigerator 100, whole process is easy to operate, user experience
Sense is promoted.
In addition, 1 outer edge of cabinet side corresponding with the door seal 30 is provided with iron plate.Here, it is closed in door body 2
When closing, meeting galvanization in spiral winding 40, and then spiral winding 40 can generate magnetic field, and 1 outer edge of cabinet is provided with iron plate,
To which the iron plate can be tightly sucked by spiral winding 40, to further improve the adsorption capacity between cabinet 1 and door body 2.
As shown in Figure 1 to Figure 3, the outer edge of the protruding portion 20 is recessed inwardly to form fluted 21, the door seal 30
It is fixedly installed in the groove 21.
Preferably, the position that 1 inner sidewall of cabinet is in contact with door seal 30 is both provided with dent, the door seal 30 and case
The position that 1 inner sidewall of body is in contact is both provided with dent；Certainly, if the position that the door seal 30 is in contact with cabinet 1 is all thick
Rough, then the frictional force between door seal 30 and cabinet 1 can be greatly improved, equally can achieve the purpose of the present invention.
Optionally, the spiral winding 40 surround for enameled wire and forms.
In conclusion the invention proposes a kind of refrigerator 100, by the door seal 30 for surrounding and being fixed in door body 2
It is embedded spiral winding 40, the spiral winding 40, which is powered, to be shunk, power-off expansion, so as to come in fact by simple power on/off
The adjusting of seal degree between existing door body 2 and cabinet 1, so that door body 2 is fitted closely with cabinet 1 when door body 2 is closed, thus
Loss of refrigeration capacity is reduced, energy consumption is reduced；When needing to open door body 2, control power-off can then open door body 2 easily, easy to operate, use
Family use feeling is promoted；It is in close state based on refrigerator 100 in the most of the time, i.e. 40 most of the time of spiral winding is in disconnected
Electricity condition realizes energy saving.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection scope.
Claims (10)
1. a kind of refrigerator, the refrigerator is provided with cabinet and the door body for seal case, which is characterized in that the door body includes
The protruding portion that is arranged towards the cabinet side and surround and be fixed on the door seal of the protruding portion, the case where door body is closed
Under, the door seal is sealed between the door body and cabinet；The door seal inner hollow, the door body further include be embedded at it is described
Spiral winding inside door seal, the refrigerator further include the control device for controlling the spiral winding power on/off；
When the door body is closed, the spiral winding power-off expansion is so that door seal seals the refrigerator；When the door body quilt
When pulling, the spiral winding, which is powered, to be shunk to eliminate the frictional force between the door seal and the cabinet.
2. a kind of refrigerator according to claim 1, which is characterized in that the control device includes and the spiral winding is electric
Property connection switch, it is described switch include be set to the door body close to the push switch of the cabinet side, the cabinet
Side close to the door body is provided with male member corresponding with the push switch；
When the male member presses the push switch, the spiral winding power-off；When the push switch with it is described convex
When part separates, the spiral winding is powered.
3. a kind of refrigerator according to claim 2, which is characterized in that it is described switch further include be set in the door body and
The handle connecting with the push switch is additionally provided with the first back-moving spring connecting with the handle in the door body；
When the handle away from cabinet direction on when pulled, the first back-moving spring is compressed and the push type is opened
Pass is separated with the male member；
When the handle is released and the door body is closed, the first back-moving spring resets so that described in male member pressing
Push switch.
4. a kind of refrigerator according to claim 3, which is characterized in that the handle concaves close to the side of the cabinet
It falls into and is formed with accommodating chamber, the push switch is set in the accommodating chamber.
5. a kind of refrigerator according to claim 4, which is characterized in that the spiral winding includes two terminals, described
Push switch includes pressing piece and the contact jaw with the electric connection of two terminals, the pressing piece are conduction material respectively
Material；
When the pressing piece and two contact end in contact, the spiral winding is powered；When the pressing piece and two institutes
When stating contact jaw separation, the spiral winding power-off.
6. a kind of refrigerator according to claim 5, which is characterized in that the accommodating chamber is additionally provided with the connection pressing piece
Second back-moving spring, when the pressing piece is pressed by the male member, the second back-moving spring is compressed and described is pressed
Casting die is separated with two contact jaws；
When the pressing piece is separated with the male member, the second back-moving spring resets so that described in the pressing piece and two
Contact end in contact.
7. a kind of refrigerator according to claim 1, which is characterized in that the cabinet outer edge is corresponding with the door seal
Side is provided with iron plate.
8. a kind of refrigerator according to claim 1, which is characterized in that the outer edge of the protruding portion is recessed inwardly to be formed
Fluted, the door seal is fixedly installed in the groove.
9. a kind of refrigerator according to claim 1, which is characterized in that the position that the box inside wall is in contact with door seal
It is both provided with dent, the position that the door seal is in contact with box inside wall is both provided with dent.
10. a kind of refrigerator according to claim 1, which is characterized in that the spiral winding surround for enameled wire and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811624730.3A CN109780798B (en) | 2018-12-28 | 2018-12-28 | Refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811624730.3A CN109780798B (en) | 2018-12-28 | 2018-12-28 | Refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109780798A true CN109780798A (en) | 2019-05-21 |
| CN109780798B CN109780798B (en) | 2022-10-28 |
Family
ID=66498762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811624730.3A Active CN109780798B (en) | 2018-12-28 | 2018-12-28 | Refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109780798B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830740A1 (en) * | 1988-09-09 | 1990-03-22 | Vogt Electronic Ag | High-power coil |
| WO2009028914A2 (en) * | 2007-09-01 | 2009-03-05 | Yong Keun Kim | Cooling container for the preventive frozen burst or shape alteration |
| CN103925763A (en) * | 2014-04-25 | 2014-07-16 | 合肥美的电冰箱有限公司 | Refrigerator door sealing device, refrigerator door and refrigerator |
| CN106595178A (en) * | 2016-11-11 | 2017-04-26 | 青岛海尔股份有限公司 | Storage device and refrigerator |
| CN106766618A (en) * | 2016-11-11 | 2017-05-31 | 青岛海尔股份有限公司 | Refrigerator |
| CN108302865A (en) * | 2018-02-26 | 2018-07-20 | 合肥美的电冰箱有限公司 | A kind of variable volume refrigerator |
| CN108592470A (en) * | 2017-12-11 | 2018-09-28 | 重庆三欣冷冻食品有限公司 | The working method of pork freezing equipment |
-
2018
- 2018-12-28 CN CN201811624730.3A patent/CN109780798B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830740A1 (en) * | 1988-09-09 | 1990-03-22 | Vogt Electronic Ag | High-power coil |
| WO2009028914A2 (en) * | 2007-09-01 | 2009-03-05 | Yong Keun Kim | Cooling container for the preventive frozen burst or shape alteration |
| CN103925763A (en) * | 2014-04-25 | 2014-07-16 | 合肥美的电冰箱有限公司 | Refrigerator door sealing device, refrigerator door and refrigerator |
| CN106595178A (en) * | 2016-11-11 | 2017-04-26 | 青岛海尔股份有限公司 | Storage device and refrigerator |
| CN106766618A (en) * | 2016-11-11 | 2017-05-31 | 青岛海尔股份有限公司 | Refrigerator |
| CN108592470A (en) * | 2017-12-11 | 2018-09-28 | 重庆三欣冷冻食品有限公司 | The working method of pork freezing equipment |
| CN108302865A (en) * | 2018-02-26 | 2018-07-20 | 合肥美的电冰箱有限公司 | A kind of variable volume refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109780798B (en) | 2022-10-28 |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 266101 Haier Road, Laoshan District, Qingdao, Qingdao, Shandong Province, No. 1 Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER JOINT STOCK Co.,Ltd. |
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| CB02 | Change of applicant information | ||
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| GR01 | Patent grant |