CN114087733B - Control method of air conditioner and air conditioner - Google Patents
Control method of air conditioner and air conditioner Download PDFInfo
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- CN114087733B CN114087733B CN202111364395.XA CN202111364395A CN114087733B CN 114087733 B CN114087733 B CN 114087733B CN 202111364395 A CN202111364395 A CN 202111364395A CN 114087733 B CN114087733 B CN 114087733B
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F2110/10—Temperature
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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
- F24F2110/10—Temperature
- F24F2110/12—Temperature 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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention belongs to the field of air conditioners, and particularly relates to a control method of an air conditioner and the air conditioner, wherein the control method comprises the following steps: the air conditioner performs dehumidification operation to obtain the outdoor environment temperature and the indoor environment temperature; when the outdoor environment meets the set temperature condition, determining a compressor frequency correction value according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the determined compressor frequency correction value. The control method of the air conditioner and the air conditioner can effectively solve the problem that the superheat degree of the bottom of the compressor cannot be guaranteed when the air conditioner is in dehumidification operation in a low-temperature environment.
Description
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to a control method of an air conditioner and the air conditioner.
Background
Winter, southern climate is mostly dark moist, the human body feels wet and cold, the indoor humidity can exceed 70% often, the clothes of sunning at home are difficult to dry for a long time more, often need open the air conditioner and dehumidify, and the process of air conditioner dehumidification is a refrigerated process, dehumidify under low temperature environment, the system very easily appears power fluctuation in partial operating mode when can feel uncomfortable in the room, especially after the condition of long connecting pipe additional refrigerant, liquid compression appears in the compressor, just need improve the bottom superheat degree of compressor under this condition, compressor frequency control scheme just seems extremely important.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, provide a control method of an air conditioner and the air conditioner, and effectively solve the problem that the superheat degree of the bottom of a compressor cannot be ensured when the air conditioner is in dehumidification operation in a low-temperature environment.
In order to solve the technical problem, the invention provides a control method of an air conditioner, which comprises the following steps
The air conditioner performs dehumidification operation to obtain the outdoor environment temperature and the indoor environment temperature;
when the outdoor environment meets the set temperature condition, determining a compressor frequency correction value according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the determined compressor frequency correction value.
Further optionally, when the outdoor environment meets the set temperature condition, determining a frequency correction value of the compressor according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the determined frequency correction value of the compressor, including
When outdoor ambient temperature T Outer ring Satisfies the following conditions: t is Outer ring When the temperature is less than or equal to the first set temperature, determining a frequency correction value corresponding to the current indoor environment temperature and the set gear of the indoor fan according to the corresponding relation table of the indoor environment temperature, the set gear of the indoor fan and the frequency correction value;
and correcting the lower limit frequency of the compressor, wherein the corrected lower limit frequency of the compressor = the lower limit frequency of the compressor corresponding to the outdoor environment temperature of the correction room + a frequency correction value.
Further optionally, the frequency correction value satisfies: frequency correction value = n Δ F, Δ F = (FA) Refrigeration system -fc_min_1）/m；
Wherein m is the number of temperature intervals of the indoor environment temperature divided in the corresponding relation table of the indoor environment temperature-indoor fan set gear-frequency correction value; n is a multiple and satisfies: n is more than or equal to 0 and less than or equal to m; FA Refrigeration The frequency value is the frequency value corresponding to the critical outer ring temperature during low-temperature refrigeration operation; and fc _ min _1 is the lowest frequency of the air conditioner refrigeration operation.
Further optionally, in the corresponding relationship table of the indoor environment temperature range, the indoor fan setting gear and the frequency correction value, when the indoor environment temperature is less than or equal to the second setting temperature, the compressor frequency correction value corresponding to the minimum wind gear is used no matter what wind gear is set by the indoor unit.
Further optionally, the air conditioner further comprises an electric auxiliary heating module;
when the indoor environment temperature is less than or equal to the second set temperature, the air gear no matter what the air gear is set by the internal machine is operated according to the minimum air gear, and the electric auxiliary thermal module and the compressor are controlled to be started synchronously.
Further optionally, the first set temperature is less than or equal to 24 ℃; the second set temperature is less than or equal to 16 ℃.
Further optionally, the control method further includes:
and when the change value of the indoor environment temperature obtained again reaches the set temperature change value, determining a new compressor frequency correction value according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the newly determined compressor frequency correction value.
The present invention also proposes a control device of an air conditioner, comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions, the one or more processors being configured to implement the method according to any one of the above when the one or more processors execute the program instructions.
The invention also proposes a non-transitory computer-readable storage medium having stored thereon program instructions for implementing a method according to any one of the above when the program instructions are executed by one or more processors.
The invention also proposes an air conditioner that employs the method of any one of the above, or that includes the control device described above, or that has a non-transitory computer-readable storage medium according to the above.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
when the air conditioner is used for dehumidification operation in a low-temperature environment, the reliability of the compressor is improved by correcting the lower limit frequency of the compressor and improving the superheat degree of the bottom of the compressor, and the environmental comfort is improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: is a control flow diagram of an embodiment of the invention;
FIG. 2: the outer ring-frequency diagram of the air conditioner in the embodiment of the invention during the refrigerating operation is shown.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Because the dehumidification process of current air conditioner is a refrigeration process promptly, dehumidifies under low temperature environment, and the liquid hammer condition appears in the compressor that leads to can't be guaranteed to indoor travelling comfort is poor and low temperature operating mode dehumidification compressor superheat degree. Therefore, the present embodiment provides a control method of an air conditioner, such as the control flowchart shown in fig. 1, including steps S1 to S2, wherein:
s1, dehumidifying and operating an air conditioner to obtain outdoor environment temperature and indoor environment temperature;
and S2, when the outdoor environment meets the set temperature condition, determining a frequency correction value of the compressor according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the determined frequency correction value of the compressor.
In this embodiment, when the air conditioner performs dehumidification operation, when the outdoor environment temperature meets the set temperature condition, that is, the outdoor environment temperature is less than or equal to the first set temperature, it indicates that the operation condition of the compressor is in the low-temperature condition at that time, in order to ensure the bottom superheat degree of the compressor during refrigeration operation of the air conditioner under the low-temperature condition, the lower limit frequency of the compressor needs to be corrected, where the bottom superheat degree of the compressor is a saturation temperature corresponding to a compressor bottom pressure temperature (oil temperature) -a system discharge pressure. In this embodiment, a frequency correction value of the compressor is determined according to the indoor ambient temperature and the set gear of the indoor fan, and in a specific embodiment, a correspondence table of the ambient temperature in the storage compartment, the set gear of the indoor fan and the frequency correction value is stored in the air conditioner, and the frequency correction value corresponding to the current indoor ambient temperature and the set gear of the indoor fan can be determined according to the correspondence table. The corrected lower limit frequency of the compressor is the lower limit frequency value of the compressor corresponding to the current outdoor environment temperature plus the frequency correction value. After the lower limit frequency of the compressor is corrected, the superheat degree of the running bottom of the compressor is ensured, and the running reliability of the compressor is ensured.
Further optionally, step S2 includes S21 to S22, where:
s21, when the outdoor environment temperature T Outer ring Satisfies the following conditions: t is a unit of Outer ring When the temperature is lower than or equal to a first set temperature, determining a frequency correction value corresponding to the current indoor environment temperature and the set gear of the indoor fan according to a corresponding relation table of the indoor environment temperature, the set gear of the indoor fan and the frequency correction value;
and S22, correcting the lower limit frequency of the compressor, wherein the corrected lower limit frequency of the compressor = the lower limit frequency of the compressor corresponding to the outdoor environment temperature of the correction room + a frequency correction value.
In one embodiment, the correspondence between the indoor ambient temperature and the indoor fan setting gear and the frequency correction value is determined by using a correspondence table of table one.
Table one: indoor environment temperature-indoor fan set gear-frequency correction value corresponding relation table
In the above table, the frequency correction value satisfies: frequency correction = n Δ F, Δ F = (FA) Refrigeration system -fc_min_1）/m；
The m is the number of temperature intervals for dividing the indoor environment temperature in the corresponding relation table of the indoor environment temperature-indoor fan set gear-frequency correction value, and the corresponding relation table in the embodiment divides the indoor environment temperature into 6 intervals, so that m =6, the specific number of the divided intervals can be adjusted according to requirements, and the protection range of the invention is not limited; n is a multiple of (delta) F, n is a multiple, and satisfies: n is more than or equal to 0 and less than or equal to m, and 0 x delta F represents that the condition is not corrected; FA Refrigeration system Critical outer loop temperature TA for cryogenic operation Refrigeration Corresponding frequency value, such as the outer loop-frequency spectrum chart of the air conditioner cooling operation shown in FIG. 2, when the outer loop temperature T Outer ring ≤TA Refrigeration system When the temperature of the compressor is higher than the current outer ring temperature, the compressor is started to run at the lower limit frequency corresponding to the current outer ring temperature; when the outer ring temperature T Outer ring ＞TA Refrigeration system When the air conditioner refrigerates to the normal refrigeration operation, the frequency of the compressor corresponds to the current outer ring temperatureFluctuating between a lower limit frequency and an upper limit frequency; and fc _ min _1 is the lowest frequency of the air conditioner refrigeration operation. TA (TA) Refrigeration system Temperature point, and FA Refrigeration system The frequency value and fc _ min _1 are fixed values and stored in the control program of the air conditioner, and the sizes of the three data are related to the specification of the air conditioner.
Further optionally, in the corresponding relation table of the indoor environment temperature range, the indoor fan setting gear and the frequency correction value, when the indoor environment temperature is less than or equal to a second setting temperature, optionally, the second setting temperature is less than or equal to 16 ℃, at the moment, the indoor temperature is very low, the indoor temperature can be further reduced in the refrigerating operation, so that the user feels uncomfortable, at the moment, the indoor unit runs according to the minimum wind gear no matter what wind gear the indoor unit sets, and the compressor frequency correction value corresponding to the minimum wind gear no matter what wind gear the indoor unit sets is, so that the situation that the indoor environment temperature is too low due to the fact that the indoor environment runs according to the wind gear set by the user under the condition that the wind gear set by the user is higher is avoided.
Further optionally, the air conditioner further comprises an electric auxiliary heating module; when the indoor environment temperature is less than or equal to the second set temperature, the electric auxiliary heating module and the compressor are controlled to be started synchronously, so that the indoor temperature drop speed is reduced
Further optionally, the first set temperature is less than or equal to 24 ℃; the second set temperature is less than or equal to 16 ℃.
Further optionally, the control method further includes:
in order to prevent the compressor from being incapable of stably running due to frequent fluctuation of the frequency of the compressor, after the lower limit frequency of the compressor is corrected, the indoor environment temperature is obtained again, when the change value of the indoor environment temperature obtained again reaches a set temperature change value, for example, when the temperature change value reaches more than 2 ℃, a new compressor frequency correction value is determined according to the indoor environment temperature and a set gear of an indoor fan, and the lower limit frequency of the compressor is corrected according to the newly determined compressor frequency correction value. And if the change value of the indoor environment temperature does not reach the set temperature change value, continuously correcting the lower limit frequency of the compressor at the current outdoor temperature according to the original compressor frequency correction value.
The embodiment also discloses the working conditions and process of dehumidification operation
(1) If the compressor is in a stopped state and T Setting up -T Inner ring Starting to dehumidify and running if the temperature is less than or equal to a third set temperature, and optionally, the third set temperature is less than or equal to 0.5 ℃;
(2) T is more than or equal to 0 in the dehumidification process Setting up -T Inner ring If the temperature is lower than the third set temperature, the dehumidification operation is still performed;
(3) The fourth set temperature is less than or equal to T in the dehumidification process Setting up -T Inner ring Stopping the machine when the temperature reaches a point; optionally, the fourth set temperature is more than or equal to 2 DEG C
Temperature setting range for air conditioner operation
(1) If T is Outer ring The temperature is set to be 10-30 ℃ when the temperature is more than or equal to 5 DEG C
(2) If T is Outer ring If the temperature is less than 5 ℃, the set temperature range is 25-30 ℃, namely the lowest set temperature judged by an external machine is 25 ℃.
The embodiment also discloses that in order to ensure the reliability of the system and avoid the phenomenon that the low pressure is too low to generate the operation of a large amount of liquid carried by the compressor, when the air conditioner meets any one of the following conditions, the compressor operates according to the set start-stop frequency, optionally, the compressor operates according to the start-7 and stop-3, namely, the compressor is stopped for 3min after being started and operated for 7min every time.
（1）T Outer ring ＜TA Refrigeration
（2）T Outer ring ≥TA Refrigeration system And T is not more than 10 DEG C Inner ring ≤16℃。
The present invention also proposes a control device of an air conditioner, comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions, the one or more processors being configured to implement the method according to any one of the above when the one or more processors execute the program instructions.
The invention also proposes a non-transitory computer-readable storage medium having stored thereon program instructions for implementing a method according to any one of the above when the program instructions are executed by one or more processors.
The invention also proposes an air conditioner that employs the method of any one of the above, or that includes the control device described above, or that has a non-transitory computer-readable storage medium according to the above.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (8)
1. A control method of an air conditioner, characterized in that the control method comprises:
the air conditioner performs dehumidification operation to obtain the outdoor environment temperature and the indoor environment temperature;
when the outdoor environment meets the set temperature condition, determining a compressor frequency correction value according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the determined compressor frequency correction value;
the compressor frequency correction value satisfies:
compressor frequency correction = n Δ F, Δ F = (FA) Refrigeration system -fc_min_1）/m；
Wherein m is the number of temperature intervals for dividing the indoor environment temperature in the indoor environment temperature-indoor fan setting gear-frequency correction value corresponding relation table; n is a multiple and satisfies: n is more than or equal to 0 and less than or equal to m; fc _ min _1 is the lowest frequency of air conditioner refrigeration operation, FA Refrigeration system Critical outer loop temperature TA for cryogenic operation Refrigeration system Corresponding frequency value when the outer ring temperature T Outer ring ≤TA Refrigeration system When in use, the refrigeration of the air conditioner is low-temperature refrigeration operation,the frequency of the refrigeration operation of the compressor is operated according to the lower limit frequency corresponding to the current outer ring temperature; when the outer ring temperature T Outer ring ＞TA Refrigeration When the air conditioner is in normal refrigeration operation, the frequency of the compressor fluctuates between the lower limit frequency and the upper limit frequency corresponding to the current outer ring temperature;
when the outdoor environment meets the set temperature condition, determining a frequency correction value of the compressor according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the determined frequency correction value of the compressor, wherein the method comprises the following steps:
when the outdoor ambient temperature T Outer ring Satisfies the following conditions: t is a unit of Outer ring When the temperature is less than or equal to the first set temperature, determining a frequency correction value corresponding to the current indoor environment temperature and the set gear of the indoor fan according to the corresponding relation table of the indoor environment temperature, the set gear of the indoor fan and the frequency correction value;
and correcting the lower limit frequency of the compressor, wherein the corrected lower limit frequency of the compressor = the lower limit frequency of the compressor corresponding to the outdoor environment temperature + the frequency correction value.
2. The method according to claim 1, wherein in the correspondence table of the indoor ambient temperature range, the indoor fan setting gear, and the frequency correction value, when the indoor ambient temperature is lower than or equal to the second setting temperature, the compressor frequency correction value corresponding to the minimum gear is used regardless of the gear set by the indoor unit.
3. The control method of an air conditioner according to claim 2, wherein the air conditioner further comprises an electric auxiliary heating module;
when the indoor environment temperature is less than or equal to the second set temperature, the air gear no matter what the air gear is set by the internal machine is operated according to the minimum air gear, and the electric auxiliary thermal module and the compressor are controlled to be started synchronously.
4. The control method of the air conditioner according to claim 3, wherein the first set temperature is less than or equal to 24 ℃; the second set temperature is less than or equal to 16 ℃.
5. The control method of an air conditioner according to any one of claims 1 to 4, further comprising:
and when the change value of the indoor environment temperature obtained again reaches the set temperature change value, determining a new compressor frequency correction value according to the indoor environment temperature and the set gear of the indoor fan, and correcting the lower limit frequency of the compressor according to the newly determined compressor frequency correction value.
6. A control apparatus of an air conditioner, comprising one or more processors and a non-transitory computer readable storage medium storing program instructions, the one or more processors being configured to implement the method according to any one of claims 1 to 5 when the one or more processors execute the program instructions.
7. A non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are to implement the method of any one of claims 1-5.
8. An air conditioner, characterized in that it employs the method of any one of claims 1-5, or comprises the control device of claim 6, or has a non-transitory computer-readable storage medium according to claim 7.
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| CN114738949A (en) * | 2022-03-14 | 2022-07-12 | 青岛海尔空调器有限总公司 | Control method and device for mobile air conditioner and mobile air conditioner |
| CN115095966A (en) * | 2022-05-31 | 2022-09-23 | 北京小米移动软件有限公司 | Control method, control device, communication equipment and storage medium |
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| CN114087733A (en) | 2022-02-25 |
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