CN202769873U - System used to judge lack of air conditioner refrigerant - Google Patents
System used to judge lack of air conditioner refrigerant Download PDFInfo
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- CN202769873U CN202769873U CN 201220322937 CN201220322937U CN202769873U CN 202769873 U CN202769873 U CN 202769873U CN 201220322937 CN201220322937 CN 201220322937 CN 201220322937 U CN201220322937 U CN 201220322937U CN 202769873 U CN202769873 U CN 202769873U
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Abstract
The utility model provides a system used to judge a lack of air conditioner refrigerant. The system used to judge the lack of the air conditioner refrigerant comprises a display module, a first temperature detecting module, a second temperature detecting module and a judging module. The first temperature detecting module is used to acquire environment temperature of an indoor machine, the second temperature detecting module is used to acquire heat transferring temperature of the indoor machine, the judging module is used to judge whether the lack of the refrigerant occurs according to a difference value of the environment temperature of the indoor machine and the heat transferring temperature of the indoor machine, and the display module, the first temperature detecting module and the second temperature detecting module are respectively connected with the judging module. According to the acquirement of the indoor environment temperature with use of an air conditioner and the heat transferring temperature of the indoor machine, a problem of the lack of the refrigerant can be detected through the difference value, so that problems that refrigeration is carried out under the condition of the lack of the refrigerant, refrigeration efficiency is reduced, and service life of the air conditioner is shortened are avoided.
Description
Technical field
The utility model relates to refrigeration technology field, particularly a kind of judgement system of the cold medium shortage for air-conditioning.
Background technology
Along with the air-conditioning use is more and more general, owing to the reasons such as collision, pipeline wear out can cause the refrigerant in the cooling cycle system secondary refrigerant leakage to occur.In the cold medium shortage situation, the refrigerating efficiency of refrigeration system is low, and in this case, uses for a long time refrigeration system, can shorten the service life of refrigeration system.
Situation how to judge timely and accurately the cold medium shortage in the cooling cycle system is a problem demanding prompt solution.
The utility model content
For addressing the above problem, the utility model provides a kind of judgement system of the cold medium shortage for air-conditioning, and this system is by gathering the parameter of operation of air conditioner, judges whether deficiency of refrigerant, and the situation of cold medium shortage is offered the user.
The utility model provides a kind of judgement system of the cold medium shortage for air-conditioning, comprising: display module; Be used for gathering the first temperature detecting module of indoor set environment temperature; Be used for gathering the second temperature detecting module of heat exchanger indoor unit temperature; Judge module for judge whether to occur cold medium shortage according to the difference size of described indoor set environment temperature, heat exchanger indoor unit temperature is connected with described display module, the first temperature detecting module and the temperature detecting module of being connected respectively.
By to the indoor environment temperature that uses air-conditioning and the collection of heat exchanger indoor unit temperature, detect the problem of the cold medium shortage of air-conditioning system appearance by difference, and the situation of cold medium shortage offered the user by display, thereby avoid reducing in the situation that cold medium shortage freezes the refrigerating efficiency of air-conditioning, and reduce the service life of air-conditioning.
Wherein, also comprise: the 3rd temperature detecting module that is used for gathering outdoor environment temperature; Also be used for determining that the described judge module of described outdoor environment temperature in predefined threshold range is connected with described the 3rd temperature detecting module.
By gathering outdoor temperature, can avoid air-conditioning in the situation that outdoor temperature low refrigeration the very, thereby make system make the false judgment of cold medium shortage, make the judgement of cold medium shortage more accurate.
Wherein, described the first temperature detecting module is arranged in the indoor air inlet of air-conditioning; Described the second temperature detecting module is arranged on the outer wall of indoor set pipeline; Described the 3rd temperature detecting module is arranged in the outdoor air inlet of air-conditioning.
Make the collection of data acquisition module convenient, more accurate.
Wherein, also comprise: the current acquisition module that is used for gathering air-conditioning total current information; Also be used for determining that according to described air-conditioning total current size the described judge module whether refrigerant stops up is connected with described current acquisition module.
By detecting the total current of operation of air conditioner, can avoid air-conditioning in the situation that the refrigerant blocking pipeline freezes, thereby make system make the false judgment of cold medium shortage, make the judgement of cold medium shortage more accurate.
Wherein, also comprise: the current acquisition module that is used for gathering air-conditioning total current information;
The described judge module that also is positioned at preset range for definite described air-conditioning total current is connected with described current acquisition module.
By detecting the total current of operation of air conditioner, can avoid air-conditioning not freeze in quietly the situation in working order, thereby make system make the false judgment of cold medium shortage, make the judgement of cold medium shortage more accurate.
Wherein, also comprise: for the timer that compressor operating time is carried out timing; Also be used for determining that the described judge module of described compressor operating time in predefined threshold range is connected with described timer.
By to carrying out timing the duration of runs of compressor, thereby the judgement that makes the cold medium shortage phenomenon at compressor operating a period of time carry out, thereby can prevent from when compressor starts is worked, not entering the generation of false judgment cold medium shortage phenomenon under the steady-working state.
Wherein, also comprise: for the frequency acquisition module that the compressor operating frequency is gathered; Also be used for determining that the described judge module of described compressor operating frequency in predefined threshold range is connected with described frequency acquisition module.
By gathering the operating frequency of compressor, can guarantee that the judgement of cold medium shortage phenomenon is carried out in the in stable condition situation of compressor operating, improve the cold medium shortage Accuracy of Judgement.
Wherein, described display module is charactron or liquid crystal display.
For the user provides good user interface, make things convenient for reminding user, be convenient to the user air-conditioning that cold medium shortage occurs is placed under repair, improved the service life of air-conditioning
Wherein, also comprise the alarm module that is connected with described judge module.
For the user provides good user interface, make things convenient for reminding user.
Description of drawings
The principle schematic of the judgement system of a kind of cold medium shortage for air-conditioning that Fig. 1 provides for the utility model embodiment;
Fig. 2 is the processing schematic diagram of the signal of the second temperature detecting module in the system shown in Figure 1;
Fig. 3 is the physical circuit figure of the second temperature detecting module in the system shown in Figure 1;
Fig. 4 is the physical circuit figure of current acquisition module in the system shown in Figure 1.
The specific embodiment
The utility model embodiment provides a kind of judgement system of the cold medium shortage for air-conditioning.Below in conjunction with accompanying drawing, embodiment is described in detail to the utility model.Referring to Fig. 1, this system comprises: judge module 10, the first temperature detecting module 11 that is connected with judge module 10 respectively, the second temperature detecting module 12 and the 3rd temperature detecting module 13.
The first temperature detecting module 11 is arranged in the indoor set air inlet of air-conditioning, is used for gathering indoor environment temperature.The second temperature detecting module 12 is attached on the outer wall of indoor set pipeline, is used for gathering the temperature of heat exchanger indoor unit.The 3rd temperature detecting module 13 is arranged in the off-premises station air inlet of air-conditioning, is used for gathering the environment temperature of off-premises station.
The difference size of the temperature of the heat exchanger indoor unit that the indoor environment temperature that judge module 10 gathers according to the first temperature detecting module 11 and the second temperature detecting module 12 gather, judge whether refrigerant occurs unusually, for example, when difference less than predetermined difference range (0-4 ℃) in, be judged to be the cold medium shortage of system, judge module 10 can adopt auspicious Sa AT chip to realize.
The outdoor environment temperature that judge module 10 also can gather according to the 3rd temperature detecting module 13, cold medium shortage is judged, for example, when the outdoor environment temperature that gathers at predefined threshold range, in 25-40 ℃, if the difference of the temperature of the environment temperature of indoor set and heat exchanger indoor unit is during less than a certain threshold value, as less than or equal to 4 ℃ the time, judge the cold medium shortage in the air-conditioning.By avoiding air-conditioning in the situation that outdoor temperature low refrigeration the very, thereby make system make the false judgment of cold medium shortage, make the judgement of cold medium shortage more accurate.
Referring to Fig. 2 and Fig. 3, in the present embodiment, temperature sensor in the second temperature detecting module 12 has adopted the variable resistor with negative temperature coefficient, therefore, the testing circuit of the second temperature detecting module is that the variation of resistance is converted to voltage signal, thereby makes resistance corresponding to different voltage signals, and then corresponding different temperature, this voltage signal is converted to data signal through analog-digital converter, and the data signal after will changing sends to judge module 10.
The first temperature detecting module 11 and the 3rd temperature detecting module 13 and the second temperature detecting module 12 signal processings are similar, just repeat no more here.
This system also can comprise the current acquisition module 14 that is connected with the off-premises station power circuit, is used for gathering the total current of air-conditioning, and current acquisition module 14 is connected with judge module 10.Gather indoor environment temperature and the heat exchanger indoor unit temperature of air-conditioning by the first temperature detecting module and the second temperature detecting module, and relatively its difference can be judged the interior cold medium shortage of air-conditioning, with this understanding, when refrigerant in the air-conditioning stops up, this moment, compressor needed larger operating current, the air-conditioning total current that current acquisition module 14 gathers will be very large, and when refrigerant in the air-conditioning does not stop up, because cold medium shortage, therefore compressor does not need larger operating current, the air-conditioning total current will be very little, and judge module 10 also can according to the size of the total current that gathers, be judged the reason of cold medium shortage more exactly.The physical circuit figure of current acquisition module 14 is referring to Fig. 4, air conditioner power source is converted into direct current to the alternating current of 220V through rectifying and wave-filtering, then by series resistance the current signal of complete machine is converted into voltage signal, offer controller, thereby obtain the complete machine current signal.
This system also can comprise timer, is used for the compressor continuous operation is carried out timing, because compressor is in the stage of bringing into operation, and the wherein distribution of refrigerant and flow also inhomogeneously, false judgment can occur by temperature and electric current judgement cold medium shortage this moment.Therefore, by timer compressor operating time is carried out timing, when compressor operating time reaches a certain predetermined value, again cold medium shortage is judged, can increase Accuracy of Judgement.This timer is connected with judge module 10.
This system also can comprise frequency acquisition module, frequency acquisition module is used for gathering compressor frequency information, because compressor is in the stage of bringing into operation, compressor brings into operation with lower frequency, this moment, system did not also reach poised state, information when the temperature information that collect this moment and current information also are not system stable operation, judge cold medium shortage by temperature and electric current this moment, false judgment can occur.Therefore, by frequency acquisition module the compressor operating frequency is gathered, when compressor frequency reaches a certain predetermined value, again cold medium shortage is judged, can increase Accuracy of Judgement.This frequency acquisition module is connected with judge module 10, this frequency acquisition module is by becoming DC voltage with external power source through rectifying and wave-filtering, then pass through the power model of drive compression machine, direct current is become three-phase alternating voltage, offer compressor, then the voltage signal of drive compression machine extracts, and passes through zero balancing and calculating, can draw the frequency of compressor.
This system also comprises the display module 15 that is connected with judge module 10.Display module 15 can be charactron or liquid crystal display.
This system also comprises the alarm module that is connected with judge module 10, and this alarm module 15 can be buzzer.
This system will be described in detail belows in both cases to the deterministic process of cold medium shortage.
Gather indoor environment temperature, heat exchanger indoor unit temperature, outdoor environment temperature and air-conditioning total current by the first temperature detecting module, the second temperature detecting module, the 3rd temperature detecting module and current acquisition module 14.
Respectively the continuous operation time T1 of compressor is carried out the running frequency of timing and collection compressor by timer and frequency acquisition module.
Whether greater than predetermined value, and the air-conditioning total current is at preset range for example in the scope of 0.2A～2.6A according to the continuous operation time T1 of compressor for judge module 10;
If air-conditioning is when refrigeration and dehumidifying running, whether judge module 10 also can be according to indoor environment temperature and outdoor environment temperature greater than the predetermined value in the preset range, for example, in 23～43 ℃ of scopes and the compressor operation frequency whether greater than a certain predetermined value of 50-70Hz for example of the predetermined value in the preset range, and whether indoor environment temperature and heat exchanger indoor unit temperature gap be less than the predetermined value in the preset range, for example, 0-7 ℃ a certain predetermined value judges whether refrigerant is not enough.If satisfy above-mentioned condition, then judge module 10 is judged as the cold medium shortage of air-conditioning.
If air-conditioning is heating when running, whether judge module 10 also need judge indoor environment temperature and outdoor environment temperature at preset range, for example-12～28 in ℃ scope and the compressor operation frequency whether greater than the predetermined value in the preset range, for example 50-70Hz.Whether heat exchanger indoor unit temperature and indoor environment temperature difference be less than the predetermined value in the preset range, and for example, 0-7 ℃ a certain predetermined value if so, then is judged as cold medium shortage.
In above-mentioned two situations, by judging that the air-conditioning total current is whether in preset range, judge whether compressor is in normal operating conditions, and in the aforementioned embodiment, by judging whether the air-conditioning total current judges whether the situation that refrigerant stops up occurs greater than a predetermined value, and this judgement is equally applicable to the judgement of above-mentioned two situations, namely, when the air-conditioning total current reaches a predetermined value beyond this compressor normal operating conditions, be judged as the situation that refrigerant stops up that occurs.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; for example; the module of difference in functionality can be realized by an integrated chip etc.; all within spirit of the present utility model and principle; any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. a judgement system that is used for the cold medium shortage of air-conditioning is characterized in that, comprising:
Display module;
Be used for gathering the first temperature detecting module of indoor set environment temperature;
Be used for gathering the second temperature detecting module of heat exchanger indoor unit temperature;
Judge module for judge whether to occur cold medium shortage according to the difference size of described indoor set environment temperature, heat exchanger indoor unit temperature is connected with described display module, the first temperature detecting module and the temperature detecting module of being connected respectively.
2. judgement according to claim 1 system is characterized in that, also comprises: the 3rd temperature detecting module that is used for gathering outdoor environment temperature;
Also be used for determining that the described judge module of described outdoor environment temperature in predefined threshold range is connected with described the 3rd temperature detecting module.
3. judgement according to claim 2 system is characterized in that, described the first temperature detecting module is arranged in the indoor air inlet of air-conditioning; Described the second temperature detecting module is arranged on the outer wall of indoor set pipeline; Described the 3rd temperature detecting module is arranged in the outdoor air inlet of air-conditioning.
4. judgement according to claim 1 system is characterized in that, also comprises: the current acquisition module that is used for gathering air-conditioning total current information;
Also be used for determining that according to described air-conditioning total current size the described judge module whether refrigerant stops up is connected with described current acquisition module.
5. judgement according to claim 1 system is characterized in that, also comprises: the current acquisition module that is used for gathering air-conditioning total current information;
The described judge module that also is positioned at preset range for definite described air-conditioning total current is connected with described current acquisition module.
6. judgement according to claim 1 system is characterized in that, also comprises: be used for timer that compressor operating time is carried out timing;
The described judge module that also reaches a predetermined value for definite described compressor operating time is connected with described timer.
7. judgement according to claim 1 system is characterized in that, also comprises: be used for frequency acquisition module that the compressor operating frequency is gathered;
The described judge module that also reaches a predetermined value for definite described compressor operating frequency is connected with described frequency acquisition module.
8. judgement according to claim 1 system is characterized in that, described display module is charactron or liquid crystal display.
9. judgement according to claim 1 system is characterized in that, also comprises the alarm module that is connected with described judge module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322937 CN202769873U (en) | 2012-07-04 | 2012-07-04 | System used to judge lack of air conditioner refrigerant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322937 CN202769873U (en) | 2012-07-04 | 2012-07-04 | System used to judge lack of air conditioner refrigerant |
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| CN202769873U true CN202769873U (en) | 2013-03-06 |
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| CN 201220322937 Expired - Lifetime CN202769873U (en) | 2012-07-04 | 2012-07-04 | System used to judge lack of air conditioner refrigerant |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103306962A (en) * | 2013-07-05 | 2013-09-18 | 四川长虹空调有限公司 | Protection method and detection circuit for freon shortage of compressor |
| CN103884480A (en) * | 2014-03-14 | 2014-06-25 | 广东美的制冷设备有限公司 | Refrigerant leak detection method, refrigerant leak detection system and air conditioner |
| CN104676855A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and coolant leakage detection method thereof |
| CN104776552A (en) * | 2014-01-14 | 2015-07-15 | 三星电子株式会社 | Air conditioner and fault diagnosis method thereof |
| CN105157295A (en) * | 2015-10-16 | 2015-12-16 | 杭州沈氏节能科技股份有限公司 | Refrigeration system and control method and control device thereof |
| CN105241070A (en) * | 2015-11-06 | 2016-01-13 | 珠海格力电器股份有限公司 | Method and device for protecting and controlling air-source water heater short of fluorine and air-source water heater |
| CN106196427A (en) * | 2016-06-29 | 2016-12-07 | 珠海格力电器股份有限公司 | A kind of control method preventing from reporting the protection of scarce coolant by mistake |
| CN106545973A (en) * | 2016-11-29 | 2017-03-29 | 广东美的暖通设备有限公司 | Multiple on-line system and its coolant quantity decision method |
| CN106895561A (en) * | 2017-02-28 | 2017-06-27 | 广东美的制冷设备有限公司 | A kind of method, control device and air-conditioner of air-conditioner for detecting air-conditioner coolant leakage |
| CN108317662A (en) * | 2018-02-05 | 2018-07-24 | 广东美的制冷设备有限公司 | Fault detection method, device, air conditioner and computer readable storage medium |
| CN108361915A (en) * | 2018-02-05 | 2018-08-03 | 广东美的制冷设备有限公司 | Fault detection method, device, air conditioner and computer readable storage medium |
| CN108954670A (en) * | 2018-09-10 | 2018-12-07 | 奥克斯空调股份有限公司 | A kind of failure pre-judging method, control system and the air conditioner of air conditioner |
| CN110243052A (en) * | 2019-06-21 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | Air conditioner self checking method, device and air conditioner |
| CN110375466A (en) * | 2018-04-13 | 2019-10-25 | 开利公司 | The detection device and method of leakage of refrigerant for air source heat pump system |
| CN110848873A (en) * | 2018-08-20 | 2020-02-28 | 奥克斯空调股份有限公司 | Air conditioner refrigerant fault detection method and air conditioner |
| TWI720913B (en) * | 2020-06-19 | 2021-03-01 | 國立臺北科技大學 | Refrigeration system with abnormal state determination function and abnormal state determination method for the same |
| CN114413425A (en) * | 2021-12-20 | 2022-04-29 | 青岛海尔空调电子有限公司 | Control method and device for air conditioner, air conditioner and storage medium |
-
2012
- 2012-07-04 CN CN 201220322937 patent/CN202769873U/en not_active Expired - Lifetime
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| CN103306962A (en) * | 2013-07-05 | 2013-09-18 | 四川长虹空调有限公司 | Protection method and detection circuit for freon shortage of compressor |
| CN104776552A (en) * | 2014-01-14 | 2015-07-15 | 三星电子株式会社 | Air conditioner and fault diagnosis method thereof |
| CN104776552B (en) * | 2014-01-14 | 2019-06-11 | 三星电子株式会社 | Air-conditioning and its method for diagnosing faults |
| CN103884480B (en) * | 2014-03-14 | 2016-07-06 | 广东美的制冷设备有限公司 | Coolant leakage detection method, refrigerant leakage detecting system and air-conditioner |
| CN103884480A (en) * | 2014-03-14 | 2014-06-25 | 广东美的制冷设备有限公司 | Refrigerant leak detection method, refrigerant leak detection system and air conditioner |
| CN104676855A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and coolant leakage detection method thereof |
| CN104676855B (en) * | 2015-02-28 | 2017-10-10 | 广东美的制冷设备有限公司 | Transducer air conditioning and its coolant leakage detection method |
| CN105157295A (en) * | 2015-10-16 | 2015-12-16 | 杭州沈氏节能科技股份有限公司 | Refrigeration system and control method and control device thereof |
| CN105241070A (en) * | 2015-11-06 | 2016-01-13 | 珠海格力电器股份有限公司 | Method and device for protecting and controlling air-source water heater short of fluorine and air-source water heater |
| CN105241070B (en) * | 2015-11-06 | 2019-01-15 | 珠海格力电器股份有限公司 | Air energy water heater lacks fluorine protection control method, device and air energy water heater |
| CN106196427A (en) * | 2016-06-29 | 2016-12-07 | 珠海格力电器股份有限公司 | A kind of control method preventing from reporting the protection of scarce coolant by mistake |
| CN106545973A (en) * | 2016-11-29 | 2017-03-29 | 广东美的暖通设备有限公司 | Multiple on-line system and its coolant quantity decision method |
| CN106545973B (en) * | 2016-11-29 | 2019-07-26 | 广东美的暖通设备有限公司 | Multi-line system and its coolant quantity determination method |
| CN106895561A (en) * | 2017-02-28 | 2017-06-27 | 广东美的制冷设备有限公司 | A kind of method, control device and air-conditioner of air-conditioner for detecting air-conditioner coolant leakage |
| CN106895561B (en) * | 2017-02-28 | 2019-07-30 | 广东美的制冷设备有限公司 | It is a kind of detection air-conditioner coolant leakage method, air conditioner control device and air conditioner |
| CN108361915A (en) * | 2018-02-05 | 2018-08-03 | 广东美的制冷设备有限公司 | Fault detection method, device, air conditioner and computer readable storage medium |
| CN108317662A (en) * | 2018-02-05 | 2018-07-24 | 广东美的制冷设备有限公司 | Fault detection method, device, air conditioner and computer readable storage medium |
| CN110375466A (en) * | 2018-04-13 | 2019-10-25 | 开利公司 | The detection device and method of leakage of refrigerant for air source heat pump system |
| CN110375466B (en) * | 2018-04-13 | 2022-10-28 | 开利公司 | Device and method for detecting refrigerant leakage of air source heat pump system |
| US11732939B2 (en) | 2018-04-13 | 2023-08-22 | Carrier Corporation | Detection apparatus and method for refrigerant leakage of air source heat pump system |
| CN110848873A (en) * | 2018-08-20 | 2020-02-28 | 奥克斯空调股份有限公司 | Air conditioner refrigerant fault detection method and air conditioner |
| CN110848873B (en) * | 2018-08-20 | 2021-09-10 | 奥克斯空调股份有限公司 | Air conditioner refrigerant fault detection method and air conditioner |
| CN108954670A (en) * | 2018-09-10 | 2018-12-07 | 奥克斯空调股份有限公司 | A kind of failure pre-judging method, control system and the air conditioner of air conditioner |
| CN108954670B (en) * | 2018-09-10 | 2020-06-02 | 奥克斯空调股份有限公司 | Fault pre-judging method and control system of air conditioner and air conditioner |
| CN110243052A (en) * | 2019-06-21 | 2019-09-17 | 宁波奥克斯电气股份有限公司 | Air conditioner self checking method, device and air conditioner |
| TWI720913B (en) * | 2020-06-19 | 2021-03-01 | 國立臺北科技大學 | Refrigeration system with abnormal state determination function and abnormal state determination method for the same |
| CN114413425A (en) * | 2021-12-20 | 2022-04-29 | 青岛海尔空调电子有限公司 | Control method and device for air conditioner, air conditioner and storage medium |
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Owner name: QINGDAO HAIER (JIAOZHOU) AIR-CONDITIONER CO., LTD. Free format text: FORMER OWNER: HAIER GROUP CORPORATION Effective date: 20130819 Owner name: HAIER GROUP CORPORATION HAIER AIR CONDITIONER GENE Free format text: FORMER OWNER: HAIER AIR CONDITIONER GENERAL CO., LTD., QINGDAO CITY Effective date: 20130819 |
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Free format text: CORRECT: ADDRESS; FROM: 266101 QINGDAO, SHANDONG PROVINCE TO: 266300 QINGDAO, SHANDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130819 Address after: 266300 Haier Industrial Park, Haier Road, Shandong, Jiaozhou Patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: HAIER Group Corp. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Patentee before: HAIER Group Corp. Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130306 |
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| CX01 | Expiry of patent term |