CN113091214A - Air conditioner and defrosting control method thereof - Google Patents
Air conditioner and defrosting control method thereof Download PDFInfo
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- CN113091214A CN113091214A CN202110348674.0A CN202110348674A CN113091214A CN 113091214 A CN113091214 A CN 113091214A CN 202110348674 A CN202110348674 A CN 202110348674A CN 113091214 A CN113091214 A CN 113091214A
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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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
- F24F2110/32—Velocity of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a defrosting control method thereof, wherein when the air conditioner is operated in a defrosting mode, outdoor environment wind speed is acquired, outdoor coil temperature is detected, defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs is acquired, and when the outdoor coil temperature is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, the air conditioner is controlled to exit defrosting; wherein, different wind speed grades correspond to different defrosting exit temperatures, and the wind speed grade is inversely related to the defrosting exit temperature. According to the invention, different defrosting exit temperatures are set according to the wind speed grade, and the defrosting exit temperatures can reflect the real state of the current wind speed grade when defrosting is finished, so that the influence of environmental wind on the temperature of the outdoor coil pipe is avoided, defrosting can be timely exited when defrosting is finished, and the indoor heating comfort level is ensured.
Description
Technical Field
The invention belongs to the technical field of air conditioners and control thereof, and particularly relates to an air conditioner and a defrosting control method thereof.
Background
When the air conditioner operates in heating mode, because the outdoor environment temperature is low, the outdoor heat exchanger has the risk of frosting, and after the outdoor heat exchanger frosts, in order to guarantee the heating effect, the outdoor heat exchanger needs to be defrosted.
When the existing air conditioner is defrosted, the method for judging the defrosting end is to quit the defrosting when the temperature of the outdoor coil is larger than the quitting temperature for a certain time, for example, the defrosting is quitted when the temperature of the outdoor coil is larger than 10 ℃ and lasts for 30 s. However, because the outdoor unit is located outdoors, the heat exchange condition of the outdoor heat exchanger is affected by the outdoor environment, especially in windy weather, frost close to fins or copper tubes of the outdoor heat exchanger is firstly changed into liquid from solid to lose adhesive force during defrosting, and the residual solid frost particles are easily blown off by wind.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.
Disclosure of Invention
The invention provides an air conditioner and a defrosting control method thereof aiming at the problems in the prior art, and aims to solve the technical problems that the actual defrosting of an outdoor heat exchanger is completed in windy weather, but the actually detected temperature of a coil cannot reach the defrosting exit temperature, so that the defrosting exit is delayed or even cannot exit.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a defrosting control method of an air conditioner comprises the following steps:
when the air conditioner is in defrosting operation, acquiring the outdoor environment wind speed, and detecting the outdoor coil temperature;
acquiring a defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs;
when the temperature of the outdoor coil pipe is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, controlling the air conditioner to exit defrosting;
wherein different wind speed grades correspond to different defrost exit temperatures, the wind speed grade being inversely related to the defrost exit temperature.
In the defrosting control method of the air conditioner, when the air conditioner performs defrosting operation, the maximum operation frequency of the compressor is limited according to the outdoor ambient wind speed.
According to the defrosting control method of the air conditioner, the air conditioner has a plurality of outdoor ambient air speed grades and the highest running frequency of the compressor corresponding to the outdoor ambient air speed grades, and the air speed grades are positively correlated with the highest running frequency of the compressor.
The defrosting control method of the air conditioner comprises the steps that the air conditioner comprises an outdoor environment wind speed sensor, and the outdoor environment wind speed sensor is used for detecting the outdoor environment wind speed; or, the air conditioner comprises a communication module, and the communication module acquires the outdoor environment wind speed through the internet.
According to the defrosting control method of the air conditioner, the air conditioner comprises at least two outdoor environment wind speed sensors which are positioned on different surfaces of the outdoor machine shell of the air conditioner, and the outdoor environment wind speed is determined according to the detection values of the at least two outdoor environment wind speed sensors.
An air conditioner, comprising:
the wind speed acquisition module is used for acquiring the outdoor ambient wind speed;
the outdoor coil temperature detection module is used for detecting the temperature of the outdoor coil;
the control module is used for acquiring defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, and controlling the air conditioner to exit defrosting when the temperature of the outdoor coil is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs;
the storage module is used for storing the defrosting exit temperature corresponding to the wind speed grade;
wherein different wind speed grades correspond to different defrost exit temperatures, the wind speed grade being inversely related to the defrost exit temperature.
The air conditioner as described above, wherein the control module is configured to limit the maximum operating frequency of the compressor according to the outdoor ambient wind speed when the air conditioner is operated in a defrosting mode.
In the air conditioner, the storage module stores a plurality of outdoor ambient wind speed grades and the maximum operating frequency of the compressor corresponding to the outdoor ambient wind speed grades, and the wind speed grades are positively correlated with the maximum operating frequency of the compressor.
In the air conditioner, the wind speed acquisition module is an outdoor environment wind speed sensor or a communication module, and the outdoor environment wind speed sensor detects outdoor environment wind speed; the communication module acquires outdoor ambient wind speed through the internet.
The air conditioner comprises at least two outdoor environment wind speed sensors which are positioned on different surfaces of the outdoor machine shell of the air conditioner, and the control module determines the outdoor environment wind speed according to the detection values of the at least two outdoor environment wind speed sensors.
Compared with the prior art, the invention has the advantages and positive effects that: the defrosting control method of the air conditioner acquires the outdoor environment wind speed when the air conditioner operates in a defrosting mode, detects the temperature of the outdoor coil, acquires the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, and controls the air conditioner to exit defrosting when the temperature of the outdoor coil is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs; wherein, different wind speed grades correspond to different defrosting exit temperatures, and the wind speed grade is inversely related to the defrosting exit temperature. According to the invention, different defrosting exit temperatures are set according to the wind speed grade, and the defrosting exit temperatures can reflect the real state of the current wind speed grade when defrosting is finished, so that the influence of environmental wind on the temperature of the outdoor coil pipe is avoided, defrosting can be timely exited when defrosting is finished, and the indoor heating comfort level is ensured.
The air conditioner comprises a wind speed acquisition module, an outdoor coil pipe temperature detection module, a control module and a storage module, wherein the wind speed acquisition module is used for acquiring the wind speed of an outdoor environment; the outdoor coil temperature detection module is used for detecting the temperature of the outdoor coil; the control module is used for acquiring defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, and controlling the air conditioner to exit defrosting when the temperature of the outdoor coil is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs; the storage module is used for storing the defrosting exit temperature corresponding to the wind speed grade; wherein, different wind speed grades correspond to different defrosting exit temperatures, and the wind speed grade is inversely related to the defrosting exit temperature. According to the invention, different defrosting exit temperatures are set according to the wind speed grade, and the defrosting exit temperatures can reflect the real state of the current wind speed grade when defrosting is finished, so that the influence of environmental wind on the temperature of the outdoor coil pipe is avoided, defrosting can be timely exited when defrosting is finished, and the indoor heating comfort level is ensured.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic block diagram of an air conditioner according to an embodiment of the present invention.
Fig. 3 and 4 are schematic views of installation positions of wind speed sensors according to the embodiment of the 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.
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.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
When the air conditioner is operated in winter for heating, because the outdoor environment temperature is low, when the evaporation temperature of the outdoor heat exchanger is lower, moisture in the air can be frosted on the surface of the outdoor heat exchanger, and the frosted thickness can be larger and larger along with the increase of the operation time of the air conditioner, so that the heat exchange capacity of the hot outdoor heat exchanger is reduced, and the heating effect is reduced. In order to prevent this, the frost layer on the heat exchanger should be removed in time, and the air conditioner continues heating operation after defrosting is completed.
When the existing air conditioner is defrosted, the method for judging defrosting completion is that defrosting is quitted when the temperature of an outdoor coil pipe is larger than the quitting temperature for a certain time, however, because an outdoor unit is positioned outdoors, the heat exchange condition of an outdoor heat exchanger is influenced by the outdoor environment, especially when defrosting is carried out in strong wind weather, when actual defrosting is completed, because the heat exchange speed of the outdoor heat exchanger through airflow is high, the temperature of the coil pipe cannot reach the defrosting quitting temperature, defrosting quitting is delayed or even quitting is not carried out, so that the air conditioner cannot be switched to a heating state in time, and the indoor comfort level is seriously influenced.
In order to solve the above problem, the present embodiment proposes a defrosting control method of an air conditioner, focusing on exiting the defrosting and the control of the defrosting process.
First, a process of the air conditioner entering the defrosting state from the normal heating operation state is explained:
when the air conditioner is in heating operation, the temperature Te of the outdoor coil and the outdoor environment temperature Tao are detected, frost point temperatures Tes corresponding to different outdoor environment temperature ranges are obtained, and defrosting is performed when the temperature Te of the outdoor coil is less than the frost point temperature corresponding to Tes in the outdoor environment temperature range to which the outdoor environment temperature belongs.
Specifically, the relationship between the outdoor environment temperature range and the corresponding frost point temperature Tes is as follows:
Tao≥6℃, Tes=-6℃。
tao is more than or equal to-15 ℃ and less than 6 ℃, Tes = Tao-3 ℃ and Tes is less than-6 ℃, and Tes is selected to be-6 ℃ when the calculated Tes is more than or equal to-6 ℃.
Tao < -15 ℃, Tes = Tao4 ℃, and Tes < -18 ℃, Tes is selected to be-18 ℃ when the calculated Tes is equal to or higher than-18 ℃.
The air conditioner enters a defrosting state after meeting the conditions, and particularly switches the outdoor heat exchanger into a heating state in a mode of switching the four-way valve so as to remove frost on the outdoor heat exchanger.
Next, control of the air conditioner in the defrosting state will be described:
when the air conditioner enters a defrosting state, the indoor fan is controlled to be weak wind so as to reduce the influence on the indoor temperature, and the outdoor fan is stopped to limit the highest running frequency of the compressor.
Because the outdoor environment wind speed can play a great promotion role in the heat exchange of the outdoor heat exchanger, in order to improve the defrosting efficiency, the maximum operating frequency of the compressor is limited according to the outdoor environment wind speed.
And acquiring the outdoor environment wind speed m, wherein the air conditioner has a plurality of outdoor environment wind speed grades and the highest running frequency of a compressor corresponding to the outdoor environment wind speed grades, and the wind speed grades are positively correlated with the highest running frequency of the compressor.
Specifically, the determination values a, b, and c are set according to the wind speed, the maximum compressor operating frequency is fmax, and the maximum compressor operating fundamental frequency is f, and then the corresponding relationship between the wind speed level and the maximum compressor operating frequency fmax is as follows:
m≤a， fmax=f；
a<m≤b, fmax=f+f1Hz;
b<m≤c, fmax=f1+f2Hz；
c<m, fmax=f1+f3Hz；
wherein f1, f2 and f3 are optimum values determined in advance according to experiments.
For example, f1=5, f2=10, f3=15Hz is a preferred set of values.
Finally, the control process of the air conditioner for quitting defrosting is explained:
when the air conditioner is in defrosting operation, acquiring the outdoor environment wind speed m, and detecting the outdoor coil temperature Te;
acquiring a defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs;
when the temperature of the outdoor coil pipe is higher than the defrosting exit temperature corresponding to the wind speed grade of the outdoor environment wind speed, controlling the air conditioner to exit defrosting;
wherein, different wind speed grades correspond to different defrosting exit temperatures, and the wind speed grade is inversely related to the defrosting exit temperature.
Specifically, if the determination values are a, b, and c, the defrosting exit temperature T1, and the defrosting base exit temperature T0 are set according to the wind speed, the corresponding relationship between the wind speed level and the defrosting exit temperature T1 is as follows:
m≤a， T1=T0；
a<m≤b, T1=T0-t1℃；
b<m≤c, T1=T0- t2℃；
c<m， T1=T0- t3℃；
wherein t1, t2, t3 are optimum values determined in advance by experiments.
For example: t1=2, t2=4, t3=6 ℃ are a set of preferred values.
For the method of acquiring the outdoor ambient wind speed m, the following two methods can be adopted:
the first method is as follows: the air conditioner comprises an outdoor environment wind speed sensor, and the outdoor environment wind speed is detected through the outdoor environment wind speed sensor.
In the method, an air speed sensor needs to be added on the outdoor unit of the air conditioner, certain cost needs to be added, however, the measured air speed is the real-time air speed of the position of the outdoor heat exchanger of the air conditioner, and the control is more accurate.
In order to further improve the detection precision, the air conditioner comprises at least two outdoor environment wind speed sensors which are positioned on different surfaces of an outdoor machine shell of the air conditioner, and the outdoor environment wind speed is determined according to the detection values of the at least two outdoor environment wind speed sensors.
Generally, two outdoor environment wind speed sensors are provided, and the two wind speed sensors are located on two adjacent surfaces of the casing of the outdoor unit of the air conditioner.
The second method comprises the following steps: the air conditioner comprises a communication module, and the communication module acquires the outdoor environment wind speed through the internet.
The mode has low cost, the air conditioner is generally provided with a communication module, and the outdoor environment wind speed can be obtained after networking, so that the defect that the current wind speed cannot be obtained when the air conditioner cannot be networked, in addition, the wind speed obtained by networking is the current atmospheric wind speed and is not the wind speed of the position of the outdoor unit of the air conditioner, and certain errors can be possibly generated.
As shown in fig. 1, the control method of the air conditioner of the present embodiment includes the following steps:
and S1, starting the computer.
And S2, the air conditioner enters heating operation.
S3, detecting the temperature Te of the outdoor coil and the outdoor environment temperature Tao, and obtaining frost point temperatures Tes corresponding to different outdoor environment temperature ranges.
S4, judging Te is less than Tes, if yes, the step S5 is executed, and if not, the step S3 is executed.
And S5, the air conditioner enters defrosting operation.
And S6, controlling the indoor fan to be weak wind, stopping the outdoor fan, acquiring the outdoor environment wind speed, and limiting the highest running frequency of the compressor according to the outdoor environment wind speed.
S7, acquiring the outdoor environment wind speed m, and detecting the outdoor coil temperature Te; and acquiring a defrosting exit temperature T1 corresponding to the wind speed grade to which the outdoor environment wind speed belongs.
S8, judging whether the outdoor coil temperature Te is higher than the defrosting exit temperature T1 corresponding to the wind speed grade to which the outdoor environment wind speed belongs, if so, entering the step S9, otherwise, entering the step S6.
S9, the air conditioner quits defrosting, and the flow goes to step S2.
As shown in fig. 2, the present embodiment further provides an air conditioner, where the air conditioner includes a wind speed obtaining module, an outdoor coil temperature detecting module, a control module, and a storage module. The concrete description is as follows:
and the wind speed acquisition module is used for acquiring the outdoor environment wind speed m.
The wind speed acquisition module is an outdoor environment wind speed sensor or a communication module.
When the air conditioner comprises the outdoor environment wind speed sensor, the outdoor environment wind speed is detected through the outdoor environment wind speed sensor.
In the method, an air speed sensor needs to be added on the outdoor unit of the air conditioner, certain cost needs to be added, however, the measured air speed is the real-time air speed of the position of the outdoor heat exchanger of the air conditioner, and the control is more accurate.
In order to further improve the detection precision, the air conditioner comprises at least two outdoor environment wind speed sensors which are positioned on different surfaces of an outdoor machine shell of the air conditioner, and the control module determines the outdoor environment wind speed according to the detection values of the at least two outdoor environment wind speed sensors.
Generally, two outdoor environment wind speed sensors are provided, and the two wind speed sensors are located on two adjacent surfaces of the casing of the outdoor unit of the air conditioner.
As shown in fig. 3 and 4, in this embodiment, the casing of the outdoor unit includes a vertical column 1 and a panel connected to the vertical column, the vertical column includes a first surface 11 and a second surface 12 connected to each other, the first surface 11 and the second surface 12 are at an angle (90 degrees), one outdoor ambient wind speed sensor 21 is located on the first surface 11, and the other outdoor ambient wind speed sensor 12 is located on the second surface 22.
When the air conditioner comprises the communication module, the communication module acquires the outdoor ambient wind speed through the internet.
The mode has low cost, the air conditioner is generally provided with a communication module, and the outdoor environment wind speed can be obtained after networking, so that the defect that the current wind speed cannot be obtained when the air conditioner cannot be networked, in addition, the wind speed obtained by networking is the current atmospheric wind speed and is not the wind speed of the position of the outdoor unit of the air conditioner, and certain errors can be possibly generated.
And the outdoor coil temperature detection module is used for detecting the outdoor coil temperature Te.
And the control module is used for controlling the switching of the heating operation and the defrosting operation of the air conditioner according to the acquired information.
When the air conditioner is in heating operation, the temperature Te of the outdoor coil and the temperature Tao of the outdoor environment are obtained, the frost point temperature Tes corresponding to different outdoor environment temperature ranges is obtained, and defrosting is performed when the temperature Te of the outdoor coil is less than the frost point temperature corresponding to the Tes in the outdoor environment temperature range to which the outdoor environment temperature belongs.
Specifically, the relationship between the outdoor environment temperature range and the corresponding frost point temperature Tes is as follows:
Tao≥6℃, Tes=-6℃。
tao is more than or equal to-15 ℃ and less than 6 ℃, Tes = Tao-3 ℃ and Tes is less than-6 ℃, and Tes is selected to be-6 ℃ when the calculated Tes is more than or equal to-6 ℃.
Tao < -15 ℃, Tes = Tao4 ℃, and Tes < -18 ℃, Tes is selected to be-18 ℃ when the calculated Tes is equal to or higher than-18 ℃.
After the conditions are met, the control module controls the air conditioner to enter a defrosting state, and particularly switches the outdoor heat exchanger into a heating state in a mode of switching the four-way valve so as to remove frost on the outdoor heat exchanger.
When the air conditioner is in a defrosting state, the control module controls the indoor fan to be weak wind so as to reduce the influence on the indoor temperature, and the outdoor fan stops to limit the highest running frequency of the compressor.
Because outdoor environment wind speed can play very big promotion effect to the heat transfer of outdoor heat exchanger, in order to improve defrosting efficiency, control module is used for limiting the highest operating frequency of compressor according to outdoor environment wind speed.
The control module acquires an outdoor environment wind speed m, the air conditioner has a plurality of outdoor environment wind speed grades and the highest running frequency of the compressor corresponding to the outdoor environment wind speed grades, and the wind speed grades are positively correlated with the highest running frequency of the compressor.
Specifically, the determination values a, b, and c are set according to the wind speed, the maximum compressor operating frequency is fmax, and the maximum compressor operating fundamental frequency is f, and then the corresponding relationship between the wind speed level and the maximum compressor operating frequency fmax is as follows:
m≤a， fmax=f；
a<m≤b, fmax=f+f1Hz;
b<m≤c, fmax=f1+f2Hz；
c<m, fmax=f1+f3Hz；
wherein f1, f2 and f3 are optimum values determined in advance according to experiments.
For example, f1=5, f2=10, f3=15Hz is a preferred set of values.
The control module is used for acquiring defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, and controlling the air conditioner to exit defrosting when the temperature of the outdoor coil is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs.
Wherein, different wind speed grades correspond to different defrosting exit temperatures, and the wind speed grade is inversely related to the defrosting exit temperature.
Specifically, if the determination values are a, b, and c, the defrosting exit temperature T1, and the defrosting base exit temperature T0 are set according to the wind speed, the corresponding relationship between the wind speed level and the defrosting exit temperature T1 is as follows:
m≤a， T1=T0；
a<m≤b, T1=T0-t1℃；
b<m≤c, T1=T0- t2℃；
c<m， T1=T0- t3℃；
wherein t1, t2, t3 are optimum values determined in advance by experiments.
For example: t1=2, t2=4, t3=6 ℃ are a set of preferred values.
The storage module is used for storing the defrosting exit temperature corresponding to the wind speed grade;
wherein different wind speed grades correspond to different defrost exit temperatures, the wind speed grade being inversely related to the defrost exit temperature.
The storage module also stores a plurality of outdoor environment wind speed grades and the corresponding maximum running frequency of the compressor, and the wind speed grades are positively correlated with the maximum running frequency of the compressor.
The defrosting method is mainly characterized in that different defrosting exit temperatures are set according to the wind speed grades, the defrosting exit temperatures can reflect the real state of the current wind speed grade when defrosting is completed, the influence of environmental wind on the temperature of the outdoor coil pipe is avoided, defrosting can be timely exited when defrosting is completed, and indoor heating comfort is guaranteed.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
when the air conditioner is in defrosting operation, acquiring the outdoor environment wind speed, and detecting the outdoor coil temperature;
acquiring a defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs;
when the temperature of the outdoor coil pipe is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, controlling the air conditioner to exit defrosting;
wherein different wind speed grades correspond to different defrost exit temperatures, the wind speed grade being inversely related to the defrost exit temperature.
2. The defrost control method of an air conditioner according to claim 1, wherein a maximum operation frequency of the compressor is limited according to the outdoor ambient wind speed when the air conditioner performs a defrost operation.
3. The defrost control method for an air conditioner according to claim 2, wherein the air conditioner has a plurality of outdoor ambient wind speed levels and their corresponding compressor maximum operating frequencies, the wind speed levels being positively correlated to the compressor maximum operating frequencies.
4. The defrosting control method of an air conditioner according to any one of claims 1 to 3, wherein the air conditioner includes an outdoor ambient wind speed sensor, by which an outdoor ambient wind speed is detected; or, the air conditioner comprises a communication module, and the communication module acquires the outdoor environment wind speed through the internet.
5. The defrosting control method of an air conditioner according to claim 4, wherein the air conditioner includes at least two outdoor ambient air speed sensors disposed on different surfaces of the outdoor unit casing of the air conditioner, and the outdoor ambient air speed is determined according to the detection values of the at least two outdoor ambient air speed sensors.
6. An air conditioner, characterized in that the air conditioner comprises:
the wind speed acquisition module is used for acquiring the outdoor ambient wind speed;
the outdoor coil temperature detection module is used for detecting the temperature of the outdoor coil;
the control module is used for acquiring defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs, and controlling the air conditioner to exit defrosting when the temperature of the outdoor coil is higher than the defrosting exit temperature corresponding to the wind speed grade to which the outdoor environment wind speed belongs;
the storage module is used for storing the defrosting exit temperature corresponding to the wind speed grade;
wherein different wind speed grades correspond to different defrost exit temperatures, the wind speed grade being inversely related to the defrost exit temperature.
7. The air conditioner of claim 6, wherein the control module is configured to limit a maximum operating frequency of the compressor based on the outdoor ambient wind speed during a defrost operation of the air conditioner.
8. The air conditioner as claimed in claim 7, wherein the storage module stores a plurality of outdoor ambient wind speed levels and corresponding maximum compressor operating frequencies, and the wind speed levels are positively correlated to the maximum compressor operating frequencies.
9. The air conditioner according to any one of claims 6 to 8, wherein the wind speed acquisition module is an outdoor environment wind speed sensor or a communication module, and the outdoor environment wind speed sensor detects an outdoor environment wind speed; the communication module acquires outdoor ambient wind speed through the internet.
10. The air conditioner as claimed in claim 9, wherein the air conditioner includes at least two outdoor ambient wind speed sensors disposed on different surfaces of the outdoor housing of the air conditioner, and the control module determines the outdoor ambient wind speed according to the detected values of the at least two outdoor ambient wind speed sensors.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110348674.0A CN113091214B (en) | 2021-03-31 | 2021-03-31 | Air conditioner and defrosting control method thereof |
| PCT/CN2022/071177 WO2022117119A1 (en) | 2021-03-31 | 2022-01-11 | Air conditioner and defrosting control method therefor |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113606760A (en) * | 2021-07-28 | 2021-11-05 | 珠海格力电器股份有限公司 | Temperature adjusting device control method and device, electronic device and storage medium |
| CN114098546A (en) * | 2021-07-15 | 2022-03-01 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of cleaning base station, cleaning base station and cleaning system |
| WO2022117119A1 (en) * | 2021-03-31 | 2022-06-09 | 青岛海尔空调器有限总公司 | Air conditioner and defrosting control method therefor |
| CN115468276A (en) * | 2022-09-30 | 2022-12-13 | 珠海格力电器股份有限公司 | Defrosting control device and device of air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114413416B (en) * | 2022-01-26 | 2023-04-25 | 宁波奥克斯电气股份有限公司 | Defrosting control method for multi-split air conditioner, storage medium and multi-split air conditioner |
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| CN113091214B (en) | 2022-07-19 |
| WO2022117119A1 (en) | 2022-06-09 |
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