CN109489237B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN109489237B CN109489237B CN201811456446.XA CN201811456446A CN109489237B CN 109489237 B CN109489237 B CN 109489237B CN 201811456446 A CN201811456446 A CN 201811456446A CN 109489237 B CN109489237 B CN 109489237B
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- heat exchange
- air conditioner
- exchange tube
- region
- refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
Abstract
The invention belongs to the field of air conditioners, and particularly provides an air conditioner. The invention aims to solve the problem of low heat exchange efficiency of the heat exchange tube in the prior art. To this end, the air conditioner of the present invention includes a heat exchanger including a case and a heat exchange tube group provided in the case, and an inlet and an outlet are provided on the case, the heat exchange tube group including a plurality of heat exchange tubes, the inside of the case being provided with a partition member, and the partition member partitioning the inside of the case into an upper region communicating with the outlet and a lower region communicating with the inlet, the plurality of heat exchange tubes being partially in the upper region and partially in the lower region, at least a part of the partition member being a non-communicating structure. The heat exchange tube group is divided into two areas which are communicated with each other by the partition member, so that the gaseous refrigerant in the lower area is effectively prevented from flowing to the heat exchange tube in the upper area.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner.
Background
The air conditioner comprises a compressor, an evaporator and a condenser, wherein a refrigerant circulates among a closed loop formed by the compressor, the condenser, a throttling device and the evaporator, and therefore refrigeration and heating are achieved. Specifically, low-temperature low-pressure gaseous refrigerant is compressed by a compressor to obtain high-temperature high-pressure gaseous refrigerant, then enters a condenser, is condensed into high-pressure low-temperature liquid refrigerant due to heat release after heat exchange, flows to an evaporator through a throttling device to obtain low-pressure liquid refrigerant after throttling and pressure reduction, and enters the compressor after being evaporated into low-temperature low-pressure gas due to heat absorption after heat exchange, so that a refrigeration/heating cycle is completed.
In the process that the refrigerant enters the evaporator and exchanges heat with the heat exchange tube in the evaporator, as part of the liquid refrigerant is heated to become gaseous refrigerant, the volume occupied by the gaseous refrigerant in the evaporator is gradually increased along with the heat exchange. And gaseous refrigerant adheres to and just can form the one deck air film on the outer wall of heat exchange tube and make liquid refrigerant can not fully lead to heat exchange efficiency to descend with the heat exchange tube contact, and the more the proportion of gaseous refrigerant is bigger in the upper region, the heat transfer effect is worse, especially the heat exchange tube in the evaporimeter of top can not fully exert heat transfer effect.
Accordingly, there is a need in the art for a new air conditioner to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem of low heat exchange efficiency of the existing heat exchange tubes, the present invention provides an air conditioner, which includes a heat exchanger including a shell and a heat exchange tube set disposed inside the shell, and an inlet and an outlet are disposed on the shell, the heat exchange tube set includes a plurality of heat exchange tubes, a partition member is disposed inside the shell, and the partition member partitions the inside of the shell into an upper region communicating with the outlet and a lower region communicating with the inlet, which communicate with each other, and one part of the plurality of heat exchange tubes is located in the upper region and the other part is located in the lower region, wherein the upper region and the lower region communicate with each other; and at least a portion of the partition member is of a non-communicating structure so as to block gaseous refrigerant in the refrigerant entering the lower region through the inlet from passing to the heat exchange tubes in the upper region.
In a preferred embodiment of the air conditioner, the partition member includes a partition main body, wherein at least a portion of the partition main body has a solid structure so as to block the gaseous refrigerant from entering the upper region from the lower region through the partition main body.
In a preferred embodiment of the above air conditioner, the partition main body is a solid structure, and a communication member is disposed between the partition main body and the casing so as to allow a gaseous refrigerant to enter the upper region from the lower region through the communication member and to be discharged through the outlet.
In a preferred embodiment of the above air conditioner, at least one protruding end extends from an outer edge of the partition main body, and the communication member is connected to an inner wall of the casing and the protruding end.
In a preferred embodiment of the above air conditioner, the at least one protruding end is a circumferentially continuous flange extending outward from an outer edge of the partition main body.
In a preferred embodiment of the air conditioner, a gap is formed between the flange and the inner wall of the housing, and at least a part of the communication member is overlapped above the flange.
In a preferred embodiment of the air conditioner, the flange is provided with a communication hole for communicating the upper and lower areas, so as to allow the refrigerant in the lower area to enter the upper area through the communication hole.
In a preferred technical solution of the above air conditioner, a gap is provided between the flange and the inner wall of the housing or the flange is abutted to the inner wall of the housing.
In a preferred embodiment of the air conditioner, the main body of the partition board is a curved structure with a downward concave middle part, wherein at least a part of the heat exchange tubes in the upper region is accommodated in the curved structure.
In a preferred technical solution of the above air conditioner, the heat exchanger is provided with a flow guide member at a position close to the inlet so as to guide the refrigerant entering the heat exchanger through the inlet to flow to a region where the lower region and the upper region are communicated with each other after entering the lower region; and/or the heat exchanger is an evaporator.
As will be understood by those skilled in the art, in the technical solution of the present invention, by providing the partition member inside the shell of the heat exchanger, a part of the plurality of heat exchange tubes is located in the upper region and another part of the plurality of heat exchange tubes is located in the lower region, and the upper region and the lower region are communicated with each other, so that the liquid refrigerant in the lower region can pass from the lower region to the upper region. At least one part of the partition component is of a non-communicated structure, so that gaseous refrigerants obtained after liquid refrigerants are heated by the heat exchange tube group in the lower area can only enter the upper area from the communicated part of the upper area and the lower area and then are discharged through the outlet, and cannot access to the heat exchange tube group arranged in the upper area, so that a large number of gaseous refrigerants are prevented from being gathered on the outer wall of the heat exchange tube group arranged in the upper area, the outer wall of the heat exchange tube group arranged in the upper area is mainly provided with the liquid refrigerants, and the heat transfer efficiency between the liquid refrigerants and the heat exchange tubes is improved. Through such setting, preferentially discharge the refrigerant through the gaseous refrigerant heat exchanger that sets up heat generation of the heat exchange tube group in the lower region, reduced the gaseous refrigerant's that sets up in the outer wall of the heat exchange tube group in upper region proportion for the outer wall that sets up the heat exchange tube group in upper region is mainly surrounded by liquid refrigerant, has increased the area of contact of liquid refrigerant and heat exchange tube, has also increased the heat transfer efficiency between refrigerant and the heat exchange tube promptly, thereby has improved the heat exchange efficiency of heat exchanger.
In a preferred technical scheme of the invention, the partition plate main body is set to be a curved surface structure with the middle part recessed downwards so as to block gaseous refrigerants from entering the outer wall of the heat exchange tube set in the upper area from the lower area. The outer edge of the curved surface structure extends outwards to form a flange, and a filter block connected with the inner wall of the shell is arranged above the flange so as to separate gaseous refrigerants and liquid refrigerants. A gap is formed between the flanging and the inner wall of the shell, and the gaseous refrigerant and the liquid refrigerant pass through the gap and then reach the filter block; or the flanging is abutted against the inner wall of the shell and is provided with a second communicating structure, and the gaseous refrigerant and the liquid refrigerant are communicated with the filter block through the second communicating structure. Through the arrangement, mixed fluid of gaseous refrigerants and liquid refrigerants, which is obtained after the mixed fluid is heated through the heat exchange tube set arranged in the lower area, enters the upper area through the communicating structure, the gaseous refrigerants and the liquid refrigerants are separated under the action of the filter block, the gaseous refrigerants are discharged through the outlet, the liquid refrigerants flow into the heat exchange tube set in the upper area along the upper surface of the curved surface structure and are further heated and gasified, therefore, the gaseous refrigerants which are gasified again only exist on the outer wall of the heat exchange tube set arranged in the upper area, the proportion of the gaseous refrigerants on the outer wall of the heat exchange tube set is greatly reduced, and the heat transfer efficiency is improved.
Drawings
The evaporator of the present invention will be described below for a single cooling function in conjunction with an air conditioner with reference to the accompanying drawings. In the drawings:
fig. 1 is a schematic view of an internal structure of an evaporator of an air conditioner in an embodiment of the present invention.
List of reference numerals:
1. a housing; 11. an inlet; 12. an outlet; 13. an upper zone heat exchange tube bank; 14. a lower zone heat exchange tube set; 2. a separator body; 21. flanging; 3. a filter block; 4. a flow guide member.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the present embodiment is described by taking an air conditioner as a single cooling air conditioner, the air conditioner may be in other forms, such as an air conditioner with both cooling and heating functions. In addition, the air conditioner may be an air conditioner in which the indoor unit and the outdoor unit are of a split structure, such as a wall-mounted air conditioner, or an air conditioner in which the indoor unit and the outdoor unit are of an integrated structure, such as a window-type air conditioner.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring first to fig. 1, fig. 1 is a schematic view of an internal structure of an evaporator of an air conditioner in an embodiment of the present invention. As shown in fig. 1 and according to the orientation shown in fig. 1, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes an evaporator, a low-temperature and low-pressure liquid refrigerant from the outdoor unit exchanges heat with indoor air in the evaporator, absorbs heat and is gasified to obtain a gaseous refrigerant, and the indoor air is cooled to achieve cooling. The evaporator of the present invention comprises a shell 1 of a cylindrical structure and a heat exchange tube group arranged in the shell, wherein the shell 1 comprises an inlet 11 arranged at the lower part and an outlet 12 arranged at the upper part, the heat exchange tube group comprises a plurality of heat exchange tubes, and a partition member is arranged in the shell to partition the interior of the shell into an upper area and a lower area which are communicated with each other, such as the partition member is arranged along the length direction of the cylindrical structure and is fixedly connected with two ends of the cylindrical structure. Wherein the upper region communicates with the outlet 12 and the lower region communicates with the inlet 11, such that refrigerant enters the lower region from the inlet and then enters the upper region through the communication between the upper and lower regions, gaseous refrigerant exits the evaporator through the outlet 12 and liquid refrigerant passes to the upper heat exchange tube bank 13. At least a part of the partition member of the present invention is configured to be a non-communicating structure, such as a plate-shaped structure, so that gaseous refrigerant generated by heating the refrigerant in the lower region can only enter the upper region through the communicating portion between the upper region and the lower region, and is not in contact with the heat exchange tube set 13 in the upper region, and is directly discharged from the upper outlet. Through the arrangement, the outer wall of the upper area heat exchange tube set 13 only has the gaseous refrigerant generated after being heated by the upper area heat exchange tube set 13, so that the specific gravity of the liquid refrigerant in the upper area is increased, namely, the contact area of the liquid refrigerant and the heat exchange tube is increased, the heat transfer efficiency between the liquid refrigerant and the heat exchange tube is improved, and the heat exchange efficiency of the heat exchanger is improved.
It will be appreciated that it is also possible to provide the portions of the partition member that are not in communication with each other as hollow structures. It is also understood that the partition member may be configured to abut against the inner wall of the housing and be provided with a communication hole near a portion contacting the inner wall of the housing, and the overall structure may be a corrugated structure. Of course, the arrangement of the partition member in the housing is only exemplary, and those skilled in the art can make adjustments as needed to suit specific applications without departing from the principles of the present invention.
The partition member comprises a partition plate main body, wherein at least one part of the partition plate main body is of a solid structure so as to block gaseous refrigerants from passing from a lower area to an upper area from the position of the partition plate main body. For example, the partition body is provided as a solid structure in a central region near the housing, and the communication member is provided in a region near the inner wall of the housing. For example, the diaphragm main body may be provided entirely as a solid structure, with a communication member provided between the diaphragm main body and the casing. With this arrangement, the refrigerant in the lower region can enter the upper region through the communicating member.
In one possible embodiment, a communication member is provided between the diaphragm body and the casing, wherein the communication member is arranged such that gaseous refrigerant in the lower region can pass through the communication member and pass to an outlet above the communication member, and liquid refrigerant in the lower region can pass through the communication member into the upper region. Preferably, the communication direction of the communication member has multiple forms, and the communication gap is smaller in the case that the communication direction is (up and down) communication, at this time, on the premise of realizing the basic communication function, because the communication gap of the up and down communication of the communication member is smaller, it is possible to intercept the liquid refrigerant moving from the lower side to the upper side of the communication member to a certain extent, so that most of the liquid refrigerant can enter the upper area in other communication directions, for example, flows inwards in the radial direction to the heat exchange tube bank located in the upper area. The communication direction can be flexibly set according to actual situations, such as horizontal or inclined, and the specific size of the communication gap, especially the communication gap in the (up-down) communication direction, can be determined according to experiments, the experience of the inventor and other ways, as long as the determined communication direction and the communication member of the communication gap can be ensured to have the functions of allowing the gaseous refrigerant to pass through and enabling the liquid refrigerant to transversely enter the upper region as far as possible. Such as a filter screen or a filter block with a ring-shaped communication member. The following description will use the communication member as a filter block as an example and in conjunction with fig. 1 to describe a possible implementation manner in the present invention.
Referring to fig. 1, as shown in fig. 1 and according to the orientation shown in fig. 1, the partition member further includes a circumferentially continuous flange 21 extending from the partition main body 2 to the inner wall of the left and right casing, respectively, in which case the partition main body 2 is of a solid structure. A gap is formed between the left/right end of the flange 21 and the inner wall of the housing 1, so that the refrigerant in the lower region can enter the upper region through the gap. Annular filter block 3 sets up in turn-ups 21's top, use the filter block 3 of left end as an example, the left end butt of filter block 3 to the inner wall of left casing 1, the right-hand member overlap joint is in turn-ups 21's top, through such setting, gaseous refrigerant and liquid refrigerant separation under filter block 3's effect behind the process clearance in the refrigerant in lower region, because gaseous refrigerant's density is less, therefore, gaseous refrigerant continues upward movement to export 12 and discharges, liquid refrigerant accesss to and is further heated between the heat exchange tube group 13 that lies in export 12 below in the region of top.
It is understood that the flanging may also be provided intermittently at the outer edge of the separator body. It can be understood that the partition member may also be provided with a flange on one side only and the other side directly abutting against the inner wall of the housing, the filter block being provided above the flange or between the flange and the inner wall of the housing. It can be understood that the partition member may not be provided with a flange, that is, the partition member only includes the partition plate main body, the filter block is disposed in a gap between the partition plate main body and the casing, one end of the filter block is fixedly connected with the partition plate main body, and the other end of the filter block is fixedly connected with the inner wall of the casing. Those skilled in the art can adjust the above arrangement as needed to suit a particular application.
In a possible embodiment, a hollow structure is arranged on the flanging so as to communicate the upper area and the lower area, so that the refrigerant in the lower area can enter the upper area through the hollow structure. The filter block is arranged above the hollow structure, so that the refrigerant in the lower area passes through the hollow structure and then is separated from the gaseous refrigerant and the liquid refrigerant under the action of the filter block. That is, the refrigerant in the lower region can enter the upper region through the hollow structure. It can be understood that the turn-ups can be abutted against the inner wall of the housing, at this time, the filter block is fixedly arranged above the turn-ups, a gap can be formed between the turn-ups and the inner wall of the housing, at this time, one end of the filter block is fixedly connected with the turn-ups, and the other end of the filter block can be abutted against the inner wall of the housing or fixedly connected with the inner wall of the housing and can also be provided with a gap. The arrangement of the flanges and the filter blocks can be adjusted as required by those skilled in the art to suit the particular application.
With reference to fig. 1, the partition body is configured as a curved surface structure with a downward concave middle portion, and thus, an accommodating space is formed in the upper region, the heat exchange tube group 13 disposed in the upper region is accommodated in the accommodating space, the liquid refrigerant separated by the filter block 3 flows into the accommodating space along the upper surface of the curved surface structure and contacts the heat exchange tube group to further increase the temperature, that is, most of the outer wall of the heat exchange tube group is the liquid refrigerant and a small amount of gaseous refrigerant generated by further heat exchange with the heat exchange tube group, instead of a large amount of gaseous refrigerant surrounding the outer wall of the heat exchange tube group, so that the proportion of the gaseous refrigerant at the outer wall of the heat exchange tube group is reduced, the contact area between the liquid refrigerant and the heat exchange tube is increased, and the heat transfer coefficient between the liquid refrigerant and the heat exchange tube is increased.
In addition, the upper surface of the upper area heat exchange tube set 13 is slightly higher than the flange 21, that is, the highest position of the heat exchange tube set is higher than the highest liquid level of the liquid refrigerant, because the liquid refrigerant is heated and gasified under the action of the heat exchange tube set, the generated gaseous refrigerant may carry part of liquid drops in the process of ascending to the outlet 12, and under the action of the heat exchange tube set higher than the liquid refrigerant level, the part of liquid drops are further heated and gasified into the gaseous refrigerant, thereby effectively avoiding the situation that the gaseous refrigerant carries the liquid refrigerant to enter the compressor.
With continued reference to fig. 1, a flow guide member 4 of a tapered configuration is provided above the inlet to divide the lower zone heat exchange tube set 14 into two communicating left and right portions. The flow guide member 4 is provided with the communicating hole through which the refrigerant entering the evaporator from the inlet 11 is led to the heat exchange tube sets arranged at the left and right sides of the lower region, so that the refrigerant is heated at the left and right sides, respectively, the generated gaseous refrigerant can rapidly enter the upper region from the gap between the inner wall of the shell 1 and the partition member, and the heat transfer efficiency between the refrigerant and the heat exchange tubes in the lower region caused by the overlarge gaseous refrigerant accumulation ratio in the lower region can not be greatly reduced, thereby ensuring the heat exchange efficiency of the whole evaporator.
In summary, in the preferred technical solution of the present invention, the partition body is configured as a curved surface structure with a downward concave middle portion, and the filter block is disposed above the flange, so that the refrigerant heated in the lower region can enter the upper region, and after the gaseous refrigerant and the liquid refrigerant are better separated under the action of the filter block, the gaseous refrigerant is discharged from the evaporator through the outlet, and the liquid refrigerant enters the outer wall of the heat exchange tube group accommodated in the accommodating space formed by the curved surface structure and is further heated and gasified. Through such setting for liquid refrigerant can be well with the outer wall contact of the heat exchange tube group who sets up in the upper zone, and can not be by a large amount of gaseous state refrigerant separation, has increased the area of contact of liquid refrigerant and heat exchange tube in the upper zone, has improved the coefficient of heat transfer between liquid refrigerant and the heat exchange tube, thereby has improved the heat exchange efficiency of evaporimeter. In addition, go up regional heat exchange tube group and be higher than the turn-ups upper surface, through such setting, can further heat the gasification with the liquid drop that gaseous refrigerant smugglied secretly, effectively avoided gaseous refrigerant to smuggle the situation that liquid refrigerant got into the compressor secretly.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (7)
1. An air conditioner is characterized in that the air conditioner comprises a heat exchanger, the heat exchanger comprises a shell and a heat exchange tube group arranged in the shell, an inlet and an outlet are arranged on the shell,
the heat exchange tube group includes a plurality of heat exchange tubes, the interior of the shell is provided with a partition member, and the partition member partitions the interior of the shell into an upper region communicating with the outlet and a lower region communicating with the inlet, which communicate with each other, a part of the plurality of heat exchange tubes is located in the upper region and another part is located in the lower region,
wherein the upper region and the lower region are in communication with each other; and is
At least a part of the partition member is of a non-communicating structure so as to block gaseous refrigerant in the refrigerant entering the lower region through the inlet from passing to the heat exchange tube in the upper region;
the partition member comprises a partition plate main body, wherein at least one part of the partition plate main body is of a solid structure so as to block gaseous refrigerants from entering the upper area from the lower area through the partition plate main body;
the partition plate main body is of a solid structure, and a communication member is arranged between the partition plate main body and the shell so as to allow gaseous refrigerant to enter the upper area from the lower area through the communication member and to be discharged through the outlet;
the partition plate main body is a curved surface structure with the middle part recessed downwards, wherein at least one part of the heat exchange tubes in the upper area is accommodated in the curved surface structure;
the heat exchanger is provided with a flow guide member at a position close to the inlet so as to guide the refrigerant entering the heat exchanger through the inlet to flow to a region where the lower region and the upper region are communicated with each other after entering the lower region.
2. The air conditioner according to claim 1, wherein the partition body has at least one protruding end extended from an outer periphery thereof, and the communication member is connected to an inner wall of the case and the protruding end.
3. The air conditioner according to claim 2, wherein said at least one protruding end is a circumferentially continuous bead extending outwardly from an outer edge of said partition body.
4. The air conditioner according to claim 3, wherein a gap is provided between the flange and the inner wall of the housing, and at least a portion of the communication member overlaps above the flange.
5. The air conditioner according to claim 3, wherein the turn-up is provided with a communication hole for communicating the upper and lower regions so as to allow the refrigerant in the lower region to enter the upper region through the communication hole.
6. The air conditioner of claim 5, wherein the flange has a gap with or abuts against the inner wall of the housing.
7. The air conditioner according to any one of claims 1 to 6, wherein the heat exchanger is an evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456446.XA CN109489237B (en) | 2018-11-30 | 2018-11-30 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456446.XA CN109489237B (en) | 2018-11-30 | 2018-11-30 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109489237A CN109489237A (en) | 2019-03-19 |
| CN109489237B true CN109489237B (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811456446.XA Active CN109489237B (en) | 2018-11-30 | 2018-11-30 | Air conditioner |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293112B1 (en) * | 1999-12-17 | 2001-09-25 | American Standard International Inc. | Falling film evaporator for a vapor compression refrigeration chiller |
| CN103615843A (en) * | 2013-11-22 | 2014-03-05 | 昆山方佳机械制造有限公司 | Novel dry-type evaporator and application method thereof |
| CN105546881B (en) * | 2015-12-07 | 2019-04-26 | 上海交通大学 | Bubble water conservancy diversion full-liquid type shell-tube evaporator |
| CN107255375A (en) * | 2017-06-30 | 2017-10-17 | 珠海格力电器股份有限公司 | Heat exchanger and air-conditioning device |
| CN209399558U (en) * | 2018-11-30 | 2019-09-17 | 青岛海尔空调电子有限公司 | Air conditioner |
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2018
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Effective date of registration: 20230111 Address after: 266500 Haier Development Zone Industrial Park, Qingdao Economic and Technological Development Zone, Shandong Province Applicant after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC 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 AIR-CONDITIONING ELECTRONIC Co.,Ltd. |
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