CN108317668B - Anti-freezing control method for indoor unit of air conditioner and air conditioner - Google Patents
Anti-freezing control method for indoor unit of air conditioner and air conditioner Download PDFInfo
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- CN108317668B CN108317668B CN201810151953.6A CN201810151953A CN108317668B CN 108317668 B CN108317668 B CN 108317668B CN 201810151953 A CN201810151953 A CN 201810151953A CN 108317668 B CN108317668 B CN 108317668B
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- 238000007710 freezing Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 54
- 230000008014 freezing Effects 0.000 claims abstract description 41
- 238000005057 refrigeration Methods 0.000 claims abstract description 12
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 206010060904 Freezing phenomenon Diseases 0.000 description 3
- 108010053481 Antifreeze Proteins Proteins 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to an anti-freezing control method for an indoor unit of an air conditioner and the air conditioner. The invention aims to solve the problems that the freezing condition of an indoor unit is difficult to accurately judge through the temperature of an inner coil of the conventional air conditioner, and accidental errors are easy to occur in the conventional point-taking judgment method. The invention discloses an anti-freezing control method for an indoor unit, which comprises the following steps: under the condition that the air conditioner is in a refrigeration working condition, acquiring the current average value of the indoor fan every other preset time interval; calculating the attenuation degree of the average value of the adjacent two currents of the indoor fan; judging whether the air conditioner enters an indoor unit anti-freezing mode or not according to the attenuation degree; the invention adopts the current average value of the indoor fan as the basic parameter and judges the current average value of the indoor fan in two adjacent times according to the attenuation degree of the current average value of the indoor fan, thereby effectively avoiding the problem of misjudgment of the air conditioner due to the fluctuation phenomenon of the fan current and further effectively improving the judgment accuracy.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an anti-freezing control method for an indoor unit of an air conditioner and the air conditioner.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, an air conditioner has become an indispensable equipment in human life. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation loop for connecting the indoor unit and the outdoor unit, and a heat exchange medium in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation loop, so as to achieve an effect of changing a room temperature. Taking the air conditioner in refrigeration operation as an example, a coil pipe of the indoor unit is always in a low temperature state; at this moment, if the indoor environment has higher humidity, the coil pipe of the indoor unit is easy to freeze, and the generation of the freezing phenomenon can seriously affect the heat exchange efficiency of the indoor unit, so that the heat exchange effect of the air conditioner is continuously weakened, and the comfort level of the indoor environment is further affected. Therefore, when the air conditioner is in a cooling operation, the air conditioner needs to ensure that the coil of the indoor unit is not frozen.
In order to monitor the freezing phenomenon of the indoor unit coil, the conventional air conditioner usually installs a temperature sensor on the coil of the indoor unit, so that the air conditioner can judge the freezing condition of the indoor unit coil through the temperature of the coil of the indoor unit, and the air conditioner can timely perform deicing treatment when the freezing phenomenon of the coil of the indoor unit occurs. However, the monitoring method has a great disadvantage that the accuracy of the monitoring method needs to depend on the flow splitting condition of the heat exchanger; particularly, when the shunting condition of the heat exchanger of the indoor unit is not good, if the air conditioner only depends on one shunt branch provided with the temperature sensor, the freezing condition of the whole coil pipe of the indoor unit is difficult to accurately judge. Furthermore, the existing control methods judge the freezing condition of the indoor unit through the coil temperature at a preset time point, and the point-taking judgment method is easily affected by accidental factors to cause judgment errors. These factors all easily lead to the air conditioner can not accurately detect the condition of freezing of indoor set, therefore also can not in time carry out deicing to the indoor set and handle, and the production of this kind of condition can seriously influence the heat exchange efficiency of air conditioner to lead to user experience to descend.
Accordingly, there is a need in the art for a new control method for preventing freezing of an indoor unit of an air conditioner and an 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 problems that the freezing condition of the indoor unit is difficult to accurately judge through the temperature of the inner coil pipe of the existing air conditioner and the accidental error is easily caused in the existing point-taking judgment method, the invention provides an anti-freezing control method for the indoor unit of the air conditioner, wherein the anti-freezing control method for the indoor unit comprises the following steps: under the condition that the air conditioner is in a refrigeration working condition, acquiring the current average value of the indoor fan every other preset time interval; calculating the attenuation degree of the average value of the current of the two adjacent times of the indoor fan; and judging whether the air conditioner enters an indoor unit anti-freezing mode or not according to the attenuation degree.
In a preferred embodiment of the above method for controlling anti-freezing of an indoor unit of an air conditioner, the step of "calculating a degree of attenuation of an average value of two adjacent currents of the indoor fan" includes: acquiring the current average value of the indoor fan in the current period and the current average value of the indoor fan in the previous period; and calculating the ratio of the current average value of the current period to the current average value of the last period.
In a preferred embodiment of the above method for controlling freezing prevention of an indoor unit of an air conditioner, the step of determining whether to enter an indoor unit freezing prevention mode according to the attenuation degree includes: if the ratio of the current average value of the current period to the current average value of the last period is smaller than a first preset value, enabling the air conditioner to enter an indoor unit anti-freezing mode; and if the ratio of the current average value in the current period to the current average value in the last period is not less than a first preset value, enabling the air conditioner to maintain the current refrigeration working condition and not enter an anti-freezing mode of the indoor unit.
In a preferable technical solution of the above control method for preventing freezing of an indoor unit of an air conditioner, the first preset value is any value between 0.85 and 0.95.
In a preferable technical solution of the above control method for preventing freezing of an indoor unit of an air conditioner, the first preset value is 0.9.
In a preferred technical solution of the above anti-freezing control method for an indoor unit of an air conditioner, the preset time period is an arbitrary value between 5s and 15 s.
In a preferred technical solution of the above-mentioned method for controlling freezing prevention of an indoor unit of an air conditioner, the method further includes a step of determining whether to exit from a freezing prevention mode of the indoor unit, and the step includes: after the air conditioner enters an indoor unit anti-freezing mode, calculating the ratio of the current average value of the current period to the current average value of the previous period; and judging whether the air conditioner exits the anti-freezing mode of the indoor unit or not according to the calculation result.
In a preferred embodiment of the above-described method for controlling anti-freezing of an indoor unit of an air conditioner, the step of determining whether to cause the air conditioner to exit the indoor unit anti-freezing mode based on the calculation result includes: if the ratio of the current average value in the current period to the current average value in the last period is greater than or equal to a second preset value, exiting the anti-freezing mode of the indoor unit; otherwise, the air conditioner maintains the current indoor unit anti-freezing working condition.
In a preferred technical solution of the above anti-freezing control method for an indoor unit of an air conditioner, the second preset value is any value between 1 and 2.
The invention also provides an air conditioner, which comprises a controller, wherein the controller is configured to be capable of executing the anti-freezing control method for the indoor unit of the air conditioner.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, the method for controlling the indoor unit to prevent freezing includes: under the condition that the air conditioner is in a refrigeration working condition, acquiring the current average value of the indoor fan every other preset time interval; calculating the attenuation degree of the average value of the current of the two adjacent times of the indoor fan; and judging whether the air conditioner enters an indoor unit anti-freezing mode or not according to the attenuation degree. Compared with the technical scheme that the freezing condition of the indoor unit is judged according to the coil temperature of the indoor unit in the prior art, the freezing condition of the indoor unit is judged according to the fan current of the indoor unit, so that the problem that the existing air conditioner is easily influenced by other irrelevant factors to cause misjudgment when the freezing condition of the indoor unit is judged according to the temperature of the inner coil is effectively solved, the judgment accuracy of the air conditioner is effectively improved, and the air conditioner is further ensured to accurately judge the freezing condition of the indoor unit to a great extent. In addition, the current average value of the indoor fan is used as a basic parameter, and the judgment is carried out according to the attenuation degree of the current average values of two adjacent times of the indoor fan, so that the judgment accuracy is further improved; in other words, even if the current of the indoor fan fluctuates accidentally in the measurement process, the average current value of the indoor fan is not greatly influenced, so that the problem that the air conditioner is misjudged due to the current fluctuation phenomenon of the indoor fan is effectively avoided, and the problem that the air conditioner frequently enters an indoor unit anti-freezing mode due to misjudgment to influence the refrigeration effect of the air conditioner is effectively avoided.
Further, in a preferred technical scheme of the present invention, the indoor unit anti-freezing control method compares a ratio of a current average value of the indoor fan in a current time period to a current average value of the indoor fan in a previous time period with a first preset value; if the ratio of the current average value of the indoor fan in the current time period to the current average value of the indoor fan in the last time period is smaller than the first preset value, enabling the air conditioner to enter an indoor unit anti-freezing mode; and if the ratio of the current average value of the indoor fan in the current period to the current average value of the indoor fan in the last period is greater than or equal to the first preset value, the air conditioner is not enabled to enter an indoor unit anti-freezing mode. That is to say, the invention compares the ratio of the current average value of the indoor fan in the current time period to the current average value of the indoor fan in the last time period with the first preset value to judge the time when the air conditioner enters the anti-freezing mode of the indoor unit, and because the fan current of the indoor unit can accurately reflect the freezing condition of the whole indoor unit, the problem that the phenomenon of misjudgment is easily caused when the whole freezing degree is judged only by the local condition in the prior art is solved, and the capability of the air conditioner for judging the freezing degree of the indoor unit is greatly improved.
Furthermore, on the basis of the control method for the indoor unit to enter the anti-freezing mode, the invention also provides a control method for the indoor unit to exit the anti-freezing mode. In a preferred embodiment of the present invention, the indoor unit anti-freezing control method compares a ratio of a current average value of the indoor fan in a current period to a current average value of the indoor fan in a previous period with a second preset value; if the ratio of the current average value of the indoor fan in the current period to the current average value of the indoor fan in the last period is greater than or equal to the second preset value, the freezing condition of the indoor unit is improved; at the moment, the air conditioner is made to exit the anti-freezing mode of the indoor unit. That is to say, the invention compares the ratio of the current average value of the indoor fan in the current period to the current average value of the indoor fan in the last period with the second preset value to judge the time when the air conditioner exits the anti-freezing mode of the indoor unit. Therefore, the method can effectively improve the accuracy of judgment by using the current average value of the indoor fan as a basic parameter to judge the time when the indoor unit exits the anti-freezing mode, thereby effectively ensuring that the freezing condition of the indoor unit is comprehensively improved when the air conditioner exits the anti-freezing mode of the indoor unit; simultaneously, the air conditioner can also resume normal refrigeration mode fast after the deicing, and then effectively guarantee the refrigeration effect of air conditioner improves user experience.
In addition, the present invention further provides an air conditioner based on the above technical solution, where the air conditioner includes a controller configured to be able to execute the anti-freezing control method in the above preferred technical solution, so as to have the technical effects of the above anti-freezing control method, and compared with the existing air conditioner, the air conditioner of the present invention effectively improves the accuracy of air conditioner determination by using the current average value of the indoor fan as basic data, and because the average value of the multiple fan currents is not greatly reduced even when the fan current of the indoor unit fluctuates accidentally, the problem that the air conditioner frequently enters the anti-freezing mode of the indoor unit to affect the cooling effect of the air conditioner due to the erroneous determination caused by the fluctuation of the fan current of the indoor unit is effectively avoided.
Drawings
FIG. 1 is a flow chart of the main steps of the control method for preventing the indoor unit from freezing according to the present invention;
fig. 2 is a flowchart illustrating specific steps of an indoor unit freezing prevention control method according to the present invention.
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 steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention.
Based on the existing air conditioner proposed in the background technology, the freezing condition of the indoor unit is difficult to accurately judge through the temperature of the inner coil, and the existing point-taking judging method is easy to have the problem of accidental errors. In order to solve the above problems in the prior art, the present invention provides an anti-freezing control method for an indoor unit of an air conditioner.
Specifically, the air conditioner of the present invention includes an indoor unit, and as shown in fig. 1, the method for controlling freezing prevention of the indoor unit of the present invention mainly includes the following steps:
s1: under the condition that the air conditioner is in a refrigeration working condition, acquiring the current average value of the indoor fan every other preset time interval;
s2: calculating the attenuation degree of the average value of the adjacent two currents of the indoor fan;
s3: and judging whether the air conditioner enters an indoor unit anti-freezing mode or not according to the attenuation degree.
The current of the fan of the indoor unit can directly reflect the freezing degree of the whole indoor unit; since the load of the fan is determined at a certain rotational speed, the corresponding fan current is also determined. In other words, when the rotation speed of the fan is determined, if the wind resistance of the fan is increased, that is, the load is increased, the fan current of the fan is necessarily decreased; meanwhile, if the fan current becomes small, it indicates that the load of the fan becomes large, that is, the wind resistance increases, that is, the indoor unit has been frozen. It can be understood that the more severe the freezing condition of the indoor unit, the smaller the fan current. The freezing degree of the indoor unit is judged by adopting the current average value of the indoor fan in the preset time period as the basic parameter, so that the air conditioner can judge the freezing condition of the indoor unit more accurately, and the problem that the conventional air conditioner is easy to generate accidental errors only by depending on the parameter of the preset time point is effectively solved.
The present invention does not limit the manner of obtaining the current value of the indoor fan and the manner of calculating the average current value of the indoor fan. Preferably, the preset time period is any value between 5s and 15 s; of course, this is not restrictive, and the skilled person can flexibly set the specific value of the preset time period in practical applications.
Next, referring to fig. 2, it is a flowchart illustrating specific steps of the method for controlling freezing prevention of an indoor unit according to the present invention. As shown in fig. 2, the method for controlling freezing prevention of an indoor unit specifically includes the following steps:
s101: under the condition that the air conditioner is in a refrigeration working condition, acquiring the current average value of the indoor fan in the current time period and the current average value of the indoor fan in the last time period;
s102: judging whether the ratio of the current average value of the current period to the current average value of the last period is smaller than a first preset value or not; if yes, executing step S104; if not, executing step S103;
s103: maintaining the air conditioner in the current mode;
s104: the air conditioner enters an indoor unit anti-freezing mode;
s105: judging whether the ratio of the current average value of the current period to the current average value of the previous period is greater than or equal to a second preset value or not; if yes, go to step S106; if not, step S105 is executed again;
s106: and enabling the air conditioner to exit the anti-freezing mode of the indoor unit.
Further, in step S101, a current average value of the indoor fan in the current time period and a current average value of the indoor fan in the previous time period are obtained, so that the anti-freezing control method of the indoor unit can determine the timing of entering and exiting the anti-freezing mode of the indoor unit according to the current average values of the indoor fans in two adjacent times. Next, in step S102, comparing a ratio of the current average value of the current period to the current average value of the previous period with a first preset value; and judging whether the air conditioner enters an indoor unit anti-freezing mode or not according to a comparison result of the ratio of the current average value in the current period to the current average value in the last period to the first preset value. It should be noted that, although the preferred embodiment includes a control method for the indoor unit to enter and exit the anti-freeze mode; however, it is obvious for the skilled person to select some of the control methods to be used according to the actual use requirement.
Specifically, in step S102, if the ratio of the current average value in the current period to the current average value in the previous period is smaller than the first preset value, it indicates that the indoor unit is freezing at a faster freezing speed; at this time, step S104 is executed, i.e., the air conditioner enters the indoor unit freeze prevention mode. If the ratio of the current average value of the current period to the current average value of the last period is greater than or equal to the first preset value, the indoor unit is not seriously frozen; at this time, step S103 is performed even if the air conditioner maintains the current operation mode.
In addition, it should be noted that, a person skilled in the art can set the anti-freezing measure to be taken when the indoor unit enters the anti-freezing mode according to actual conditions of different air conditioners. In the preferred embodiment, the air conditioner reduces the frequency of the compressor to 0.8 times of the current frequency, so that the freezing condition of the indoor unit can be rapidly improved; of course, the technician may set the freeze prevention mode according to the actual conditions of different air conditioners.
As can be appreciated by a person skilled in the art, preferably, said first preset value is any value between 0.85 and 0.95; further preferably, the first preset value is 0.9. Certainly, this is not limiting, and a person skilled in the art may flexibly set a specific numerical value of the first preset value in practical application, as long as whether the attenuation speed of the fan current of the indoor unit is too fast can be determined by the demarcation point determined by the first preset value. It should be noted that the present invention does not limit any method for obtaining the average value of the indoor fan current.
Further, in step S105, a ratio of the current average value of the current period to the current average value of the previous period is compared with a second preset value; and judging whether the air conditioner exits the anti-freezing mode of the indoor unit or not according to the comparison result of the ratio of the current average value of the current period to the current average value of the previous period to the second preset value. If the ratio of the current average value of the current period to the current average value of the last period is greater than or equal to the second preset value, the freezing condition of the indoor unit is effectively improved; at this time, step S106 is executed, namely, the air conditioner exits the indoor unit freeze prevention mode. If the ratio of the current average value of the current period to the current average value of the last period is smaller than the second preset value, the freezing condition of the indoor unit is still serious; in this case, step S105 is executed again, that is, the determination is made again so that the anti-freeze mode is exited again when the freezing condition of the indoor unit is improved.
As can be appreciated by a person skilled in the art, preferably, said second preset value is any value between 1 and 2; of course, this is not limiting, and a person skilled in the art may flexibly set a specific value of the second preset value in practical applications, as long as the demarcation point determined by the second preset value can determine whether the freezing condition of the indoor unit is gradually improved.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is 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 (8)
1. An indoor unit anti-freezing control method for an air conditioner is characterized by comprising the following steps:
under the condition that the air conditioner is in a refrigeration working condition, acquiring the current average value of the indoor fan every other preset time interval;
calculating the attenuation degree of the average value of the current of the two adjacent times of the indoor fan;
judging whether the air conditioner enters an indoor unit anti-freezing mode or not according to the attenuation degree;
the step of calculating the attenuation degree of the average value of the two adjacent currents of the indoor fan comprises the following steps:
acquiring the current average value of the indoor fan in the current period and the current average value of the indoor fan in the previous period;
calculating the ratio of the current average value of the current period to the current average value of the previous period;
the step of judging whether to make the air conditioner enter an indoor unit anti-freezing mode according to the attenuation degree comprises the following steps:
if the ratio of the current average value of the current period to the current average value of the last period is smaller than a first preset value, enabling the air conditioner to enter an indoor unit anti-freezing mode;
the control method for preventing the indoor unit from freezing further comprises the step of judging whether to exit from the anti-freezing mode of the indoor unit, wherein the step comprises the following steps:
after the air conditioner enters an indoor unit anti-freezing mode, calculating the ratio of the current average value of the current period to the current average value of the previous period;
judging whether the air conditioner exits the anti-freezing mode of the indoor unit or not according to the calculation result;
the step of judging whether the air conditioner exits the anti-freezing mode of the indoor unit according to the calculation result comprises the following steps:
if the ratio of the current average value in the current period to the current average value in the last period is greater than or equal to a second preset value, exiting the anti-freezing mode of the indoor unit;
wherein the first preset value is smaller than the second preset value.
2. The indoor unit anti-freezing control method for the air conditioner as claimed in claim 1, wherein the step of determining whether to enter the indoor unit anti-freezing mode according to the attenuation degree further comprises:
and if the ratio of the current average value in the current period to the current average value in the last period is not less than a first preset value, enabling the air conditioner to maintain the current refrigeration working condition and not enter an anti-freezing mode of the indoor unit.
3. The indoor unit anti-freezing control method for the air conditioner according to claim 2, wherein the first preset value is any value between 0.85 and 0.95.
4. The indoor unit anti-freezing control method for the air conditioner according to claim 3, wherein the first preset value is 0.9.
5. The indoor unit anti-freezing control method for an air conditioner according to any one of claims 1 to 4, wherein the preset time period is any value between 5s and 15 s.
6. The indoor unit freeze-prevention control method for the air conditioner according to claim 1, wherein the step of determining whether to make the air conditioner exit the indoor unit freeze-prevention mode according to the calculation result further includes:
and if the ratio of the current average value in the current period to the current average value in the last period is smaller than a second preset value, enabling the air conditioner to maintain the current indoor unit anti-freezing working condition.
7. The indoor unit anti-freezing control method for the air conditioner according to claim 6, wherein the second preset value is any value between 1 and 2.
8. An air conditioner including a controller, characterized in that the controller is configured to be able to execute the indoor unit anti-freezing control method for an air conditioner of any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111189198B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189193B (en) * | 2018-11-14 | 2021-09-21 | 重庆海尔空调器有限公司 | Air conditioner and anti-freezing control method thereof |
| CN111189159B (en) * | 2018-11-14 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189180B (en) * | 2018-11-14 | 2021-09-21 | 重庆海尔空调器有限公司 | Air conditioner and anti-freezing control method thereof |
| CN111189158B (en) * | 2018-11-14 | 2022-03-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189197B (en) * | 2018-11-14 | 2021-09-21 | 重庆海尔空调器有限公司 | Air conditioner and anti-freezing control method thereof |
| CN111189196B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189164B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189181B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189163B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189162B (en) * | 2018-11-14 | 2021-10-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN110736219B (en) * | 2019-09-20 | 2022-04-19 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
| CN110736218A (en) * | 2019-09-20 | 2020-01-31 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
| CN111692710B (en) * | 2020-06-24 | 2021-09-21 | 宁波奥克斯电气股份有限公司 | Control method for preventing freezing and defrosting and air conditioner |
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| CN107228451A (en) * | 2017-05-17 | 2017-10-03 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107300240A (en) * | 2017-05-17 | 2017-10-27 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107560064A (en) * | 2017-08-11 | 2018-01-09 | 珠海格力电器股份有限公司 | Air conditioner air outlet micropore filth blockage detection method and device, storage medium and air conditioner |
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Effective date of registration: 20200911 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Co-patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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Effective date of registration: 20201102 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee before: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. |