CN114413415B - Defrosting control method of air conditioner and controller thereof - Google Patents
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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
- F24F11/62—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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- 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
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Abstract
The application relates to an air conditioner defrosting control method and a controller thereof. The method comprises the following steps: acquiring a frosting degree grade according to the temperature decay rate of the outer tube; acquiring indoor target temperature drop according to an indoor temperature difference value, wherein the indoor temperature difference value is the difference value between the user set temperature and the indoor detection temperature; the indoor target temperature is reduced to be the corresponding indoor adjustment target at the current indoor temperature difference value and the indoor detection temperature; and determining the current compressor running frequency of the air conditioner according to the proportional relation between the frosting degree grade and the indoor target temperature drop. According to the scheme, the actual defrosting requirement of the user can be obtained according to the proportional relation between the frosting degree and the target temperature drop, the correction frequency of the compressor is determined according to the actual defrosting requirement of the user, and then the running frequency of the compressor under different defrosting requirements is determined.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner defrosting control method and a controller thereof.
Background
In the related art, along with the continuous improvement of the living standard of people, in order to maintain comfortable environment temperature, an air conditioner has become an indispensable equipment in people's life, when the air conditioner is operated in winter low temperature environment, because the refrigerant evaporation temperature of flowing through the outdoor heat exchanger is lower and outdoor humidity is higher, the surface of the heat exchanger is easy to accumulate the frost layer when the air conditioner is operated for a long time, thereby influencing the heat exchange effect of the air conditioner.
To solve the above problems, the conventional methods in the prior art are as follows: when the air conditioner meets certain conditions, the air conditioner is controlled to be switched into a refrigerating operation mode from a heating operation mode, so that a refrigerant with higher temperature flows through an outdoor heat exchanger, the surface temperature of the heat exchanger is increased, a frost layer is melted, the outdoor heat exchanger is withdrawn from a defrosting mode (namely, the refrigerating operation mode) after the temperature of the outdoor heat exchanger is increased to a certain temperature, and is switched into the heating operation mode again, the temperature drop amplitude in an inner chamber in a short time can be too large, the comfort experience of a user is influenced, and even more, the condition that the user catches a cold occurs, so that when the air conditioner performs defrosting operation, according to the actual defrosting requirement of the user, the indoor temperature fluctuation is reduced while the defrosting effect is considered as much as possible, and the comfort of the user is improved.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides an air conditioner defrosting control method and a controller thereof, wherein the air conditioner defrosting control method can obtain an actual defrosting demand index value of a user according to a proportional relation between a frosting degree and a target temperature drop, and determine a correction frequency of a compressor according to the actual defrosting demand index value of the user, so that the operation frequency of the compressor under different defrosting demands is adjusted, the fineness in defrosting operation is improved, the fluctuation of indoor temperature is reduced while the defrosting effect is considered as much as possible, and the comfort level of the user is improved.
The first aspect of the present application provides an air conditioner defrosting control method, comprising the following steps: acquiring a frosting degree grade according to the temperature decay rate of the outer tube; acquiring indoor target temperature drop according to an indoor temperature difference value, wherein the indoor temperature difference value is a difference value between a user set temperature and an indoor detection temperature; the indoor target temperature is reduced to be the indoor adjustment target corresponding to the current indoor temperature difference value and the indoor detection temperature; and determining the current operating frequency of the compressor of the air conditioner according to the proportional relation between the frosting degree grade and the indoor target temperature drop.
In one embodiment, the determining the current compressor operating frequency of the air conditioner according to the proportional relationship between the frost level and the indoor target temperature drop includes: setting a frosting degree weight value according to the frosting degree grade; setting a target temperature drop weight value according to the indoor target temperature drop; obtaining a defrosting demand index value according to the proportional relation between the frosting degree weight value and the target temperature drop weight value; matching a third corresponding relation table to obtain a compressor correction frequency, wherein the third corresponding relation table is a mapping relation table of defrosting demand index values and the compressor correction frequency; and determining the current compressor operating frequency of the air conditioner according to the compressor correction frequency.
In one embodiment, the obtaining the frost level based on the decay rate of the outer tube temperature comprises: acquiring the temperature of the outer tube at the first moment and the second moment within a fixed time step tau; calculating the temperature decay rate of the outer tube according to the temperature of the outer tube at the first moment and the temperature at the second moment; and matching a first corresponding relation table to obtain a frosting degree grade, wherein the first corresponding relation table is a mapping relation table of the temperature decay rate of the outer tube and the frosting degree.
In one embodiment, the obtaining the indoor target temperature drop from the indoor temperature difference comprises: acquiring a user set temperature and an indoor detection temperature, and calculating an indoor temperature difference value between the user set temperature and the indoor detection temperature; and matching a second corresponding relation table to determine indoor target temperature drop, wherein the second corresponding relation table is a mapping relation table of indoor temperature difference value, indoor detection temperature and indoor target temperature drop.
In one embodiment, the third correspondence table includes a first defrost demand index value, a second defrost demand index value, a third defrost demand index value, a fourth defrost demand index value, and a fifth defrost demand index value; when the defrost demand index value is greater than or equal to the first defrost demand index value and less than or equal to the second defrost demand index value, the compressor correction frequency is determined to be a first compressor correction frequency; when the defrost demand index value is greater than the second defrost demand index value and less than or equal to the third defrost demand index value, the compressor correction frequency is determined to be a second compressor correction frequency; when the defrost demand index value is greater than the third defrost demand index value and less than or equal to the fourth defrost demand index value, the compressor correction frequency is determined as a third compressor correction frequency; when the defrost demand index value is greater than the fourth defrost demand index value and less than or equal to the fifth defrost demand index value, the compressor correction frequency is determined as a fourth compressor correction frequency; when the defrost demand index value is greater than a fifth defrost demand index value, the compressor correction frequency is determined as a fifth compressor correction frequency; wherein the first defrost demand index value < the second defrost demand index value < the third defrost demand index value < the fourth defrost demand index value < the fifth defrost demand index value; the first compressor correction frequency < the second compressor correction frequency < the third compressor correction frequency < the fourth compressor correction frequency < the fifth compressor correction frequency.
In one embodiment, the first correspondence table includes a first decay rate, a second decay rate, a third decay rate, and a fourth decay rate; when the temperature decay rate of the outer tube is greater than the second decay rate and less than or equal to the first decay rate, the degree of frosting is determined to be a level I degree of frosting; when the outer tube temperature decay rate is greater than a third decay rate and less than or equal to a second decay rate, the degree of frost is determined to be a level ii degree of frost; when the outer tube temperature decay rate is greater than a fourth decay rate and less than or equal to a third decay rate, the degree of frost is determined to be a level III degree of frost; when the temperature decay rate of the outer tube is less than or equal to a fourth decay rate, determining the frosting degree as a IV-level frosting degree; wherein the outer tube temperature decay rate is a negative value, the first decay rate > the second decay rate > the third decay rate > the fourth decay rate.
In one embodiment, the indoor temperature differences in the second correspondence table include a first temperature difference, a second temperature difference, a third temperature difference, and a fourth temperature difference, the first temperature difference < second temperature difference < third temperature difference < fourth temperature difference; the indoor detection temperature in the second corresponding relation table comprises a first indoor temperature, a second indoor temperature, a third indoor temperature and a fourth indoor temperature, wherein the first indoor temperature is less than the second indoor temperature, the third indoor temperature is less than the fourth indoor temperature; when the indoor detection temperature is a first indoor temperature, the first temperature difference value, the second temperature difference value, the third temperature difference value and the fourth temperature difference value respectively correspond to a first target temperature drop, a second target temperature drop, a third target temperature drop and a fourth target temperature drop, wherein the first target temperature drop is greater than the second target temperature drop, the third target temperature drop is greater than the fourth target temperature drop; when the temperature difference is a first temperature difference, the first indoor temperature, the second indoor temperature, the third indoor temperature, and the fourth indoor temperature correspond to a first target temperature drop, a fifth target temperature drop, a ninth target temperature drop, and a thirteenth target temperature drop, respectively, wherein the first target temperature drop < the fifth target temperature drop < the ninth target temperature drop < the thirteenth target temperature drop.
In one embodiment, the indoor target temperature drop comprises: and the value of any one of the N indoor target temperature drops is more than or equal to 1 ℃ and less than or equal to 7 ℃.
In one embodiment, the calculation formula of the current compressor operation frequency of the air conditioner is as follows: f=f Correction +F Datum Wherein F is Correction Frequency correction for compressor, F Datum Is the defrost stage compressor reference frequency.
In one embodiment, the air conditioner compressor correction frequency has a value in the range of greater than or equal to-10 HZ and less than or equal to 10HZ.
In one embodiment, said setting a frosting degree weight value according to said frosting degree grade comprises: the frosting degree is divided into a grade I frosting degree, a grade II frosting degree, a grade III frosting degree and a grade IV frosting degree, wherein the grade I frosting degree is smaller than the grade II frosting degree, the grade III frosting degree is smaller than the grade IV frosting degree, and weight values of the frosting degrees are respectively set to 0.7,0.8,0.9,1 according to the grade I frosting degree, the grade II frosting degree, the grade III frosting degree and the grade IV frosting degree;
the setting the target temperature drop weight value according to the indoor target temperature drop comprises: dividing the indoor target temperature drop into a first target temperature drop gradient, a second target temperature drop gradient and a third target temperature drop gradient, wherein the first target temperature drop gradient is smaller than the second target temperature drop gradient and smaller than the third target temperature drop gradient, and setting the weight value of the target temperature drop as 0.8,0.9,1 according to the first target temperature drop gradient, the second target temperature drop gradient and the third target temperature drop gradient respectively.
Another aspect of the present application provides an air conditioner defrost controller, which is characterized by performing the air conditioner defrost control method as described above.
The technical scheme that this application provided can include following beneficial effect: in the heating process of the air conditioner in winter, the surface of the outdoor heat exchanger is easy to frost, the temperature of the copper pipe of the outdoor heat exchanger can be rapidly reduced due to the frost, and the copper pipe enters a stage of extremely rapid attenuation, and generally, the temperature of a certain copper pipe on the surface of the heat exchanger is used for representing the surface temperature of the heat exchanger, namely the temperature of the outer pipe. When the absolute value of the outer tube temperature decay rate is larger, the outer tube temperature decay rate is represented to be faster, the frost layer is thicker, the frosting degree can be determined through the outer tube temperature decay rate in the extremely fast decay stage, when the indoor detection temperature is high or the indoor temperature difference value is small, the user is higher in the acceptance degree of the temperature decay degree, when the indoor detection temperature is low or the indoor temperature difference value is large, the user is lower in the acceptance degree of the temperature decay degree, the indoor target temperature decay can be determined according to the indoor temperature difference value and the indoor detection temperature, the user can determine the acceptance degree of the indoor temperature decay degree in the defrosting stage, the actual defrosting demand index value of the user can be obtained according to the proportional relation of the defrosting degree and the target temperature decay, the current compressor operating frequency of the air conditioner is determined according to the actual defrosting demand index value of the user, the operating frequency of the compressor in the defrosting stage is determined according to the actual defrosting demand index value of the user, the fine degree in defrosting operation is improved, the situation that the indoor temperature fluctuation is large in the indoor temperature is avoided, in the prior art is caused, the defrosting effect is ensured, the indoor temperature fluctuation is reduced, the user fluctuation is reduced, and the user fluctuation is reduced as much as possible is simultaneously.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a flowchart of an air conditioner defrosting control method according to an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first message may also be referred to as a second message, and similarly, a second message may also be referred to as a first message, without departing from the scope of the present application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
At present, under the heating operation mode of air conditioner, the copper pipe of heat exchanger frosts easily and influences the effect of heat exchanger, needs to carry out defrosting operation, among the prior art, can lead to the interior temperature of short time inner room to drop the range too big when defrosting, influences user's travelling comfort and experiences, and what is more, has the condition that the user catches a cold to appear.
In view of the above problems, the embodiments of the present application provide an air conditioner defrosting control method, which can obtain an actual defrosting demand index value of a user according to a proportional relationship between a frosting degree and a target temperature drop, and determine a correction frequency of a compressor according to the actual defrosting demand index value of the user, so as to determine operation frequencies of compressors under different defrosting demands, thereby improving fineness in defrosting operation, reducing temperature fluctuation while considering defrosting effects as much as possible, and improving comfort level of the user.
The following describes the technical scheme of the embodiments of the present application in detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1, fig. 1 is a flow chart illustrating a defrosting control method of an air conditioner according to an embodiment of the present application.
The defrosting control method of the air conditioner comprises the following steps:
s1, in the heating process of an air conditioner in winter, the surface of an outdoor heat exchanger is easy to frost, the temperature of a copper pipe of the outdoor heat exchanger can be rapidly reduced due to the frost formation, and the outdoor heat exchanger enters a stage of extremely rapid attenuation, and generally, the temperature of a certain copper pipe on the surface of the heat exchanger is used for representing the surface temperature of the heat exchanger, namely the temperature of an outer pipe. The stage of the rapid decrease of the outer tube temperature is called as a rapid attenuation stage, the change rate of the outer tube temperature in the rapid attenuation stage is called as an outer tube temperature attenuation rate, and the effect of the heat exchanger is affected by the frosting of the surface of the heat exchanger, specifically, when the frost layer on the surface of the heat exchanger is thicker, the heat exchange effect of the heat exchanger is poorer, defrosting operation is needed, in order to better match the actual defrosting requirement of a user, before the defrosting operation is carried out, the control unit of the air conditioner can acquire the outer tube temperature at different moments and calculate the outer tube temperature attenuation rate, the frosting degree grade is acquired according to the outer tube temperature attenuation rate, and the requirement of the user on defrosting can be acquired according to the frosting degree grade;
S2, as the conventional air conditioner has indoor temperature drop of 5-7 ℃ in the reverse circulation defrosting stage, for some users, the temperature drop fluctuation is too large, discomfort is easily caused, and in order to better match the acceptance range of the users for the temperature drop, the indoor target temperature drop can be obtained according to an indoor temperature difference value, wherein the indoor temperature difference value is the difference value between the user set temperature and the indoor detection temperature; the indoor target temperature is reduced to be the corresponding indoor adjustment target under the current indoor temperature difference and the indoor detection temperature, specifically, when the air conditioner enters defrosting operation, the control unit of the air conditioner can acquire the user set temperature and the indoor detection temperature, the indoor temperature difference is obtained according to the calculation of the user set temperature and the indoor detection temperature, and then the indoor adjustment target is determined according to the indoor temperature difference and the indoor detection temperature, because the indoor temperature difference can represent the difference between the current indoor detection temperature and the expected temperature of the user, when the indoor temperature difference is larger or the indoor detection temperature is lower, the current indoor detection temperature is far away from the user set temperature, the requirement of the user on the temperature is higher, the acceptance range of temperature reduction is lower, and the indoor target temperature reduction is needed at the moment.
S3, the requirements of users on defrosting can be matched according to the frosting degree grade, the receiving range of the users on temperature drop can be matched according to indoor target temperature drop, and in order to give consideration to the defrosting effect as much as possible, the current operation frequency of the compressor of the air conditioner is determined according to the proportional relation between the frosting degree grade and the indoor target temperature drop.
In the first embodiment, in the heating process of the air conditioner in winter, the surface of the outdoor heat exchanger is easy to frost, the temperature of the copper pipe of the outdoor heat exchanger can be rapidly reduced due to the frost, and the stage of extremely rapid attenuation is entered, and generally, the temperature of a certain copper pipe on the surface of the heat exchanger is used for representing the surface temperature of the heat exchanger, namely the temperature of the outer pipe. When the absolute value of the outer tube temperature decay rate is larger, the outer tube temperature decay rate is represented to be faster, the frost layer is thicker, the frosting degree can be determined through the outer tube temperature decay rate in the extremely fast decay stage, when the indoor detection temperature is high or the indoor temperature difference value is small, the user is higher in acceptance of the temperature decay degree, when the indoor detection temperature is low or the indoor temperature difference value is large, the user is lower in acceptance of the temperature decay degree, then the indoor target temperature decay can be determined according to the indoor temperature difference value and the indoor detection temperature, the user can obtain the actual defrosting demand index value according to the proportional relation of the defrosting degree and the target temperature decay, the current compressor operating frequency of the air conditioner is determined according to the actual defrosting demand index value of the user, the scheme improves the operating frequency of the compressor in the defrosting stage according to the actual defrosting demand index value of the user, the situation that in the indoor temperature fluctuation is larger in the indoor temperature is caused, the indoor temperature fluctuation is realized in a short time, the defrosting effect is improved by improving the operating frequency of the compressor by refinement, the indoor temperature fluctuation effect is prolonged, and the user's defrosting comfort is improved.
Example two
On the basis of the method in the first embodiment, the following technical scheme may be further adopted, which specifically includes:
in step S1, the acquiring the frost level according to the outer pipe temperature decay rate includes: the outer tube temperature at the first moment and the second moment is obtained in a fixed time step tau, the outer tube temperature decay rate is calculated according to the outer tube temperature at the first moment and the temperature at the second moment, and a formula adopted for specifically calculating the outer tube temperature decay rate is as follows:
wherein T is t0 For the temperature of the outer tube at the first moment，T t0+τ For the outer tube temperature at the second moment, the first moment is earlier than the second moment, τ is a fixed time step, the frost formation degree grade is obtained by matching a first corresponding relation table according to the calculated outer tube temperature attenuation rate, and the first corresponding relation table is a mapping relation table of the outer tube temperature attenuation rate and the frost formation degree, and is shown in table 1 in detail.
TABLE 1 mapping relationship table of outer tube temperature decay rate and frosting degree
In Table 1, since the temperature of the outer tube is lowered due to frosting, the decay rate of the outer tube temperature v takes a negative value, v 1 For a first decay rate, v 2 At a second decay rate, v 3 For a third decay rate and v 4 A fourth decay rate;
The first correspondence table includes a first decay rate v 1 Second decay rate v 2 Third decay rate v 3 And a fourth decay rate v 4 Wherein v 4 ＜υ 3 ＜υ 2 ＜υ 1 ≤0；
When the temperature decay rate of the outer tube is larger than the second decay rate v 2 And is less than or equal to the first decay rate v 1 When the frosting degree is determined as the grade I frosting degree;
when the temperature decay rate of the outer tube is larger than the third decay rate v 3 And is less than or equal to the second decay rate v 2 When the frosting degree is determined as a grade II frosting degree;
when the temperature decay rate of the outer tube is greater than the fourth decay rate and less than or equal to the third decay rate v 3 When the frosting degree is determined as III-level frosting degree;
when the temperature decay rate of the outer tube is less than or equal to a fourth decay rate, determining the frosting degree as a IV-level frosting degree;
wherein, the level I frosting degree is less than the level II frosting degree is less than the level III frosting degree is less than the level IV frosting degree.
In step S2, the obtaining the indoor target temperature drop according to the indoor temperature difference value includes: acquiring a user set temperature and an indoor detection temperature, and calculating an indoor temperature difference value between the user set temperature and the indoor detection temperature, wherein a calculation formula of the indoor temperature difference value is as follows: Δt: Δt=t Setting up -T Internal measurement Wherein T is Setting up For setting the temperature for the user, T Internal measurement Detecting the temperature indoors;
and (3) matching a second corresponding relation table to determine the indoor target temperature drop, wherein the second corresponding relation table is a mapping relation table of an indoor temperature difference value, an indoor detection temperature and the indoor target temperature drop, and is shown in a table 2 in detail.
TABLE 2 mapping relationship table of indoor temperature difference, indoor temperature and indoor target temperature drop
In table 2: deltaT 1 Is the first temperature difference value delta T 2 Is the second temperature difference value delta T 3 Is the third temperature difference value delta T 4 For a fourth temperature difference, T Internal test 1 Is the temperature in the first room, T Internal test 2 Is the temperature in the second room, T Internal test 3 For a third indoor temperature and T Internal test 4 Is the fourth indoor temperature.
The indoor temperature difference DeltaT in the second corresponding relation table comprises a first temperature difference DeltaT 1 Second temperature difference DeltaT 2 Third temperature difference DeltaT 3 And a fourth temperature difference DeltaT 4 Wherein the first temperature difference DeltaT 1 <Second temperature difference DeltaT 2 <Third temperature difference DeltaT 3 <Fourth temperature difference DeltaT 4 Specifically, the first temperature difference DeltaT 1 Less than or equal to 1 ℃, the second temperature difference DeltaT 2 Greater than 1 ℃ and less than or equal to 3 ℃, said third temperature difference DeltaT 3 Greater than 3 ℃ and less than or equal to 5 ℃, said fourth temperature difference DeltaT 4 big At 5 ℃.
Indoor detection temperature T in the second corresponding relation table Internal measurement Including a first indoor temperature T Internal test 1 Second indoor temperature T Internal test 2 Temperature T in third chamber Internal test 3 And a fourth indoor temperature T Internal test 4 Wherein the first indoor temperature T Internal test 1 <Second indoor temperature T Internal test 2 <Third indoor temperature T Internal test 3 <Fourth indoor temperature T Internal test 4 Specifically, the first indoor temperature T Internal test 1 Less than 16 ℃, the second indoor temperature T Internal test 2 Greater than or equal to 16 ℃ and less than 20 ℃, the third indoor temperature T Internal test 3 Greater than or equal to 20 ℃ and less than 25 ℃, the fourth indoor temperature T Internal test 4 Greater than or equal to 25 ℃.
T when the indoor temperature is the first indoor temperature Internal test 1 The first temperature difference DeltaT 1 The second temperature difference DeltaT 2 The third temperature difference DeltaT 3 And the fourth temperature difference DeltaT 4 Respectively correspond to the first target temperature drop delta T Target temperature drop 1 A second target temperature drop DeltaT Target temperature drop 2 Third target temperature drop DeltaT Target temperature drop 3 And a fourth target temperature drop DeltaT Target temperature drop 4 Wherein, the temperature drop delta T of the first target is more than or equal to 7 DEG C Target temperature drop 1 >Second target temperature drop DeltaT Target temperature drop 2 >Third target temperature drop DeltaT Target temperature drop 3 >Fourth target temperature drop DeltaT Target temperature drop 4 1 ℃ or higher, preferably 3 ℃ or higher, the first target temperature drop DeltaT Target temperature drop 1 >Second target temperature drop DeltaT Target temperature drop 2 >Third target temperature drop DeltaT Target temperature drop 3 >Fourth target temperature drop DeltaT Target temperature drop 4 ≥1℃。
T when the indoor detected temperature is the second indoor temperature Internal test 2 The first temperature difference DeltaT 1 The second temperature difference DeltaT 2 The third temperature difference DeltaT 3 And the fourth temperature difference DeltaT 4 Respectively correspond to the fifth target temperature drop delta T Target temperature drop 5 The sixth target temperature drop DeltaT Target temperature drop6 Seventh target temperature drop DeltaT Target temperature drop 7 And an eighth target temperature drop DeltaT Target temperature drop 8 Wherein, the temperature drop delta T of the fifth target is more than or equal to 7 DEG C Target temperature drop 5 >The sixth target temperature drop DeltaT Target temperature drop 6 >Seventh target temperature drop DeltaT Target temperature drop 7 >Eighth target temperature drop DeltaT Target temperature drop 8 ≥1℃。
T when the indoor temperature is the third indoor temperature Internal test 3 The first temperature difference DeltaT 1 The second temperature difference DeltaT 2 The third temperature difference DeltaT 3 And the fourth temperature difference DeltaT 4 Respectively correspond to the ninth target temperature drop delta T Target temperature drop 9 Tenth target temperature drop DeltaT Target temperature drop 10 Eleventh target temperature drop DeltaT Target temperature drop 11 And a twelfth target temperature drop DeltaT Target temperature drop 12 Wherein, the temperature drop delta T of the ninth target is more than or equal to 7 DEG C Target temperature drop 9 >Tenth target temperature drop DeltaT Target temperature drop 10 >Eleventh target temperature drop DeltaT Target temperature drop 11 >Twelfth target temperature drop DeltaT Target temperature drop 12 ≥1℃。
T when the indoor temperature is the fourth indoor temperature Internal test 4 The first temperature difference DeltaT 1 The second temperature difference DeltaT 2 The third temperature difference DeltaT 3 And the fourth temperature difference DeltaT 4 Respectively correspond to thirteenth target temperature drop delta T Target temperature drop 13 Fourteenth target temperature drop DeltaT Target temperature drop 14 Fifteenth target temperature drop DeltaT Target temperature drop 15 And sixteenth target temperature drop DeltaT Target temperature drop 16 Wherein, the temperature drop delta T of the thirteenth target is more than or equal to 7 DEG C Target temperature drop 13 >Fourteenth target temperature drop DeltaT Target temperature drop 14 >Fifteenth target temperature drop DeltaT Target temperature drop 15 >Sixteenth target temperature drop DeltaT Target temperature drop 16 1 ℃ or higher, preferably 7 ℃ or higher, thirteenth target temperature drop DeltaT Target temperature drop 13 >Fourteenth target temperature drop DeltaT Target temperature drop 14 >Fifteenth target temperature drop DeltaT Target temperature drop 15 >Sixteenth target temperature drop DeltaT Target temperature drop 16 ≥3℃。
When the temperature difference is the first temperature difference DeltaT 1 At the time, the first indoor temperature T Internal test 1 The second indoor temperature T Internal test 2 The third indoor temperature T Internal test 3 And the fourth indoor temperature T Internal test 4 Respectively correspond to the first target temperature drop delta T Target temperature drop 1 A fifth target temperature drop DeltaT Target temperature drop 5 Ninth target temperature drop DeltaT Target temperature drop 9 And thirteenth target temperature drop DeltaT Target temperature drop 13 Wherein, the temperature drop delta T of the first target temperature is less than or equal to 1 DEG C Target temperature drop 1 <Fifth target temperature drop DeltaT Target temperature drop 5 <Ninth target temperature drop DeltaT Target temperature drop 9 <Thirteenth target temperature drop DeltaT Target temperature drop 13 ≤7℃。
When the temperature difference is the first temperature difference DeltaT 2 At the time, the first indoor temperature T Internal test 1 The second indoor temperature T Internal test 2 The third indoor temperature T Internal test 3 And the fourth indoor temperature T Internal test 4 Respectively correspond to the second target temperature drop delta T Target temperature drop 2 The sixth target temperature drop DeltaT Target temperature drop 6 Tenth target temperature drop DeltaT Target temperature drop 10 And a fourteenth target temperature drop DeltaT Target temperature drop 14 Wherein, the temperature drop delta T of the second target temperature is less than or equal to 1 DEG C Target temperature drop 2 <The sixth target temperature drop DeltaT Target temperature drop 6 <Tenth target temperature drop DeltaT Target temperature drop 10 <Fourteenth target temperature drop DeltaT Target temperature drop 14 ≤7℃。
When the temperature difference is the first temperature difference DeltaT 3 At the time, the first indoor temperature T Internal test 1 The second indoor temperature T Internal test 2 The third indoor temperature T Internal test 3 And the fourth indoor temperature T Internal test 4 Respectively correspond to the third target temperature drop delta T Target temperature drop 3 Seventh target temperature drop DeltaT Target temperature drop 7 Eleventh target temperature drop DeltaT Target temperature drop 11 And a fifteenth target temperature drop DeltaT Target temperature drop 15 Wherein, the temperature drop delta T of the third target is less than or equal to 1 DEG C Target temperature drop 3 <Seventh target temperature drop DeltaT Target temperature drop 7 <Tenth stepA target temperature drop DeltaT Target temperature drop 11 <Fifteenth target temperature drop DeltaT Target temperature drop 15 ≤7℃。
When the temperature difference is the first temperature difference DeltaT 4 At the time, the first indoor temperature T Internal test 1 The second indoor temperature T Internal test 2 The third indoor temperature T Internal test 3 And the fourth indoor temperature T Internal test 4 Respectively correspond to the fourth target temperature drop delta T Target temperature drop 4 Eighth target temperature drop DeltaT Target temperature drop 8 Twelfth target temperature drop DeltaT Target temperature drop 12 And sixteenth target temperature drop DeltaT Target temperature drop 16 Wherein, the temperature drop delta T of the fourth target is less than or equal to 1 DEG C Target temperature drop 4 <Eighth target temperature drop DeltaT Target temperature drop 8 <Twelfth target temperature drop DeltaT Target temperature drop 12 <Sixteenth target temperature drop DeltaT Target temperature drop 16 ≤7℃。
The principle of the indoor target temperature drop is that the lower the indoor detected temperature or the larger the indoor temperature difference value is, the smaller the indoor target temperature drop is in the range of 1-7 ℃.
In step S3, the determining, according to the proportional relationship between the frost level and the indoor target temperature drop, the current compressor operating frequency of the air conditioner includes: setting a frosting degree weight value according to the frosting degree grade; setting a target temperature drop weight value according to the indoor target temperature drop; obtaining a defrosting demand index value s according to the proportional relation between the frosting degree weight value and the target temperature drop weight value, wherein the specific details are shown in a table 3;
TABLE 3 defrosting demand index value Table
As shown in table 3, the setting the frosting degree weight value according to the frosting degree grade includes: setting the weight values of the frost formation degrees according to the I-level frost formation degree, the II-level frost formation degree, the III-level frost formation degree and the IV-level frost formation degree to be K, L, M and N respectively, wherein the K, L, M and the N take values of 0.7, 0.8, 0.9 and 1 respectively.
The setting the target temperature drop weight value according to the indoor target temperature drop comprises: decreasing the indoor target temperature by delta T Target temperature drop The method comprises a first target temperature gradient, a second target temperature gradient and a third target temperature gradient, wherein the first target temperature gradient is<A second target temperature drop gradient<The third target temperature drop gradient is specifically, the first target temperature drop gradient is greater than or equal to 1 ℃ and less than 3 ℃, the second target temperature drop gradient is greater than or equal to 3 ℃ and less than 5 ℃, the third target temperature drop gradient is greater than or equal to 5 ℃ and less than or equal to 7 ℃, the weight values of indoor target temperature drops are set to A, B and C according to the first target temperature drop gradient, the second target temperature drop gradient and the third target temperature drop gradient, specifically, the A, B and the C are respectively 0.8, 0.9 and 1.
If the frost formation degree is level I, the indoor target temperature is reduced by delta T Target temperature drop When the first target temperature drop gradient is set, the defrosting demand index value is set
Note that, the K, L, M, N, A, B and C may be given different weight values, which are only examples.
Obtaining a compressor correction frequency according to the matching of the defrosting demand index value with a third corresponding relation table, wherein the third corresponding relation table is a mapping relation table of the defrosting demand index value and the compressor correction frequency, and is detailed in
Table 4;
table 4 mapping relation table of defrosting demand index value and compressor correction frequency
As shown in table 4:
for defrosting demand index value, F Correction Is a compressorCorrection of frequency, F Correction 01 Correcting frequency, F for first compressor Correction 02 Correcting frequency, F for second compressor Correction 03 Correcting frequency, F for third compressor Correction 04 Correction of frequency sum F for fourth compressor Correction 05 Correcting the frequency for the fifth compressor; />
The third correspondence table includes a first defrost demand index value, a second defrost demand index value, a third defrost demand index value, a fourth defrost demand index value, and a fifth defrost demand index value, wherein the first defrost demand index value < second defrost demand index value < third defrost demand index value < fourth defrost demand index value < fifth defrost demand index value, specifically, the first defrost demand index value is 0.65, the second defrost demand index value is 0.85, the third defrost demand index value is 0.95, the fourth defrost demand index value is 1.05, and the fifth defrost demand index value is 1.25.
When the defrost demand index value is greater than or equal to the first defrost demand index value and less than or equal to the second defrost demand index value, the compressor correction frequency is determined to be a first compressor correction frequency;
When the defrost demand index value is greater than the second defrost demand index value and less than or equal to the third defrost demand index value, the compressor correction frequency is determined to be a second compressor correction frequency;
when the defrost demand index value is greater than the third defrost demand index value and less than or equal to the fourth defrost demand index value, the compressor correction frequency is determined as a third compressor correction frequency;
when the defrost demand index value is greater than the fourth defrost demand index value and less than or equal to the fifth defrost demand index value, the compressor correction frequency is determined as a fourth compressor correction frequency;
when the defrost demand index value is greater than a fifth defrost demand index value, the compressor correction frequency is determined as a fifth compressor correction frequency;
wherein the first compressor correction frequency < the second compressor correction frequency < the third compressor correction frequency < the fourth compressor correction frequency < the fifth compressor correction frequency.
Determining the current compressor operation frequency of the air conditioner according to the compressor correction frequency, wherein the calculation formula of the current compressor operation frequency of the air conditioner is as follows: f=f Correction +F Datum Wherein F is Correction Frequency correction for compressor, F Datum And in order to defrost the reference frequency of the compressor, the correction frequency of the air conditioner compressor is in a value range of more than or equal to-10 HZ and less than or equal to 10HZ.
In the embodiment of the application, through the mapping relation table of the outer tube temperature attenuation rate and the frosting degree, the mapping relation table of the indoor temperature difference value, the indoor temperature and the indoor target temperature drop, the mapping relation table of the defrosting demand index value table and the defrosting demand index value and the compressor correction frequency, feasible refining operation is carried out on the frosting degree, the indoor target temperature drop and the compressor correction frequency, the fineness in the defrosting operation is improved, the situation that the fluctuation of the indoor temperature is large in a short time is caused during defrosting in the prior art is avoided, the running frequency of the compressor is adjusted in a refined mode, the defrosting time is prolonged, the indoor temperature fluctuation is reduced, the defrosting effect is reduced as far as possible, and the comfort of a user is improved.
Description of application examples:
in winter, the air conditioner is in a heating mode, if the user sets the temperature to 25 ℃, when the copper pipe of the outdoor heat exchanger rapidly descends into a very fast attenuation stage due to frosting, generally, the temperature of one copper pipe on the surface of the heat exchanger is used for representing the surface temperature of the heat exchanger, namely the temperature of the outer pipe, at the moment, the frosting degree is judged according to the attenuation rate v of the outer pipe temperature in the attenuation stage, the judging mode is shown in a table 1 in detail, if the fixed time step tau is taken as 6S, the value of v is assumed to be-0.05 ℃/S at the moment, and the frosting degree belongs to the II stage.
Assuming that the indoor environment temperature is 18 ℃ at the moment of defrosting, delta T is more than 5 ℃ and is shown in Table 2, since the temperature is 16 ℃ less than or equal to T Internal measurement < 20 ℃, deltaT > 5 ℃, indicating that the current indoor temperature is relatively low and is relevant to the userThe expected temperature of the target is far away, the target temperature is not excessively reduced, and the corresponding indoor target temperature is reduced to be eighth target temperature reduction delta T Target temperature drop 8 Eighth target temperature drop DeltaT Target temperature drop 8 Can take a value of 2 ℃;
the current frosting degree is level II, the corresponding frosting degree weight value is 0.8, and the eighth target temperature drop delta T Target temperature drop 8 The value of 2 ℃ and the corresponding target temperature drop weight value of 0.8 are shown in Table 3, and the defrosting demand index value is shown in the specification
That is, according to Table 4, the defrosting demand index value belongs to +.>
In the section (2), the correction value for the defrosting frequency is F Correction 02 Reference frequency F of defrosting stage Datum Adding a second compressor correction frequency F Correction 02 The current compressor operation frequency of the air conditioner can be determined, and the air conditioner can be operated according to the current compressor operation frequency.
Example III
Corresponding to the foregoing embodiment of the application function implementation method, the present application further provides an air conditioner defrosting controller, configured to execute the air conditioner defrosting control method described above.
The defrosting control method of the air conditioner can refer to the above embodiments, and will not be described herein.
In the embodiment of the present application, the air conditioner defrosting control method as described above may be performed by the air conditioner defrosting controller.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (11)
1. The defrosting control method for the air conditioner is characterized by comprising the following steps of:
acquiring a frosting degree grade according to the temperature decay rate of the outer tube;
acquiring indoor target temperature drop according to an indoor temperature difference value, wherein the indoor temperature difference value is a difference value between a user set temperature and an indoor detection temperature; the indoor target temperature is reduced to be the indoor adjustment target corresponding to the current indoor temperature difference value and the indoor detection temperature;
according to the proportional relation between the frosting degree grade and the indoor target temperature drop, determining the current compressor operation frequency of the air conditioner comprises the following steps:
Setting a frosting degree weight value according to the frosting degree grade;
setting a target temperature drop weight value according to the indoor target temperature drop;
obtaining a defrosting demand index value according to the proportional relation between the frosting degree weight value and the target temperature drop weight value;
matching a third corresponding relation table to obtain a compressor correction frequency, wherein the third corresponding relation table is a mapping relation table of defrosting demand index values and the compressor correction frequency;
and determining the current compressor operating frequency of the air conditioner according to the compressor correction frequency.
2. The defrosting control method of an air conditioner according to claim 1, wherein,
the obtaining the frosting degree grade according to the temperature decay rate of the outer tube comprises the following steps:
acquiring the temperature of the outer tube at the first moment and the second moment within a fixed time step tau;
calculating the temperature decay rate of the outer tube according to the temperature of the outer tube at the first moment and the temperature at the second moment;
and matching a first corresponding relation table to obtain a frosting degree grade, wherein the first corresponding relation table is a mapping relation table of the temperature decay rate of the outer tube and the frosting degree.
3. The defrosting control method of an air conditioner according to claim 1, wherein,
the obtaining the indoor target temperature drop according to the indoor temperature difference value comprises the following steps:
Acquiring a user set temperature and an indoor detection temperature, and calculating an indoor temperature difference value between the user set temperature and the indoor detection temperature;
and matching a second corresponding relation table to determine indoor target temperature drop, wherein the second corresponding relation table is a mapping relation table of indoor temperature difference value, indoor detection temperature and indoor target temperature drop.
4. The method according to claim 1 a defrosting control method of an air conditioner, it is characterized in that the method comprises the steps of,
the third correspondence table includes a first defrost demand index value, a second defrost demand index value, a third defrost demand index value, a fourth defrost demand index value, and a fifth defrost demand index value;
when the defrost demand index value is greater than or equal to the first defrost demand index value and less than or equal to the second defrost demand index value, the compressor correction frequency is determined to be a first compressor correction frequency;
when the defrost demand index value is greater than the second defrost demand index value and less than or equal to the third defrost demand index value, the compressor correction frequency is determined to be a second compressor correction frequency;
when the defrost demand index value is greater than the third defrost demand index value and less than or equal to the fourth defrost demand index value, the compressor correction frequency is determined as a third compressor correction frequency;
When the defrost demand index value is greater than the fourth defrost demand index value and less than or equal to the fifth defrost demand index value, the compressor correction frequency is determined as a fourth compressor correction frequency;
when the defrost demand index value is greater than a fifth defrost demand index value, the compressor correction frequency is determined as a fifth compressor correction frequency;
wherein the first defrost demand index value < the second defrost demand index value < the third defrost demand index value < the fourth defrost demand index value < the fifth defrost demand index value;
the first compressor correction frequency < the second compressor correction frequency < the third compressor correction frequency < the fourth compressor correction frequency < the fifth compressor correction frequency.
5. The defrosting control method for an air conditioner as claimed in claim 2, wherein,
the first correspondence table comprises a first attenuation rate, a second attenuation rate, a third attenuation rate and a fourth attenuation rate;
when the temperature decay rate of the outer tube is greater than the second decay rate and less than or equal to the first decay rate, the degree of frosting is determined to be a level I degree of frosting;
when the outer tube temperature decay rate is greater than a third decay rate and less than or equal to a second decay rate, the degree of frost is determined to be a level ii degree of frost;
When the outer tube temperature decay rate is greater than a fourth decay rate and less than or equal to a third decay rate, the degree of frost is determined to be a level III degree of frost;
when the temperature decay rate of the outer tube is less than or equal to a fourth decay rate, determining the frosting degree as a IV-level frosting degree;
wherein the outer tube temperature decay rate is a negative value, the first decay rate > the second decay rate > the third decay rate > the fourth decay rate.
6. The defrosting control method of an air conditioner according to claim 3, wherein,
the indoor temperature difference value in the second corresponding relation table comprises a first temperature difference value, a second temperature difference value, a third temperature difference value and a fourth temperature difference value, wherein the first temperature difference value is smaller than the second temperature difference value, the third temperature difference value is smaller than the fourth temperature difference value;
the indoor detection temperature in the second corresponding relation table comprises a first indoor temperature, a second indoor temperature, a third indoor temperature and a fourth indoor temperature, wherein the first indoor temperature is less than the second indoor temperature, the third indoor temperature is less than the fourth indoor temperature;
when the indoor detection temperature is a first indoor temperature, the first temperature difference value, the second temperature difference value, the third temperature difference value and the fourth temperature difference value respectively correspond to a first target temperature drop, a second target temperature drop, a third target temperature drop and a fourth target temperature drop, wherein the first target temperature drop is greater than the second target temperature drop, the third target temperature drop is greater than the fourth target temperature drop;
When the temperature difference is a first temperature difference, the first indoor temperature, the second indoor temperature, the third indoor temperature, and the fourth indoor temperature correspond to a first target temperature drop, a fifth target temperature drop, a ninth target temperature drop, and a thirteenth target temperature drop, respectively, wherein the first target temperature drop < the fifth target temperature drop < the ninth target temperature drop < the thirteenth target temperature drop.
7. The defrosting control method of an air conditioner according to claim 1, wherein,
the indoor target temperature drop includes: and the value of any one of the N indoor target temperature drops is more than or equal to 1 ℃ and less than or equal to 7 ℃.
8. The defrosting control method of an air conditioner according to claim 1, wherein,
the calculation formula of the current compressor running frequency of the air conditioner is as follows: f=f Correction +F Datum Wherein F is Correction Frequency correction for compressor, F Datum Is the defrost stage compressor reference frequency.
9. The defrosting control method of an air conditioner according to claim 1, wherein,
the value range of the correction frequency of the compressor is more than or equal to-10 HZ and less than or equal to 10HZ.
10. The defrosting control method of an air conditioner according to claim 1, wherein,
The setting of the frosting degree weight value according to the frosting degree grade comprises: the frosting degree is divided into a grade I frosting degree, a grade II frosting degree, a grade III frosting degree and a grade IV frosting degree, wherein the grade I frosting degree is smaller than the grade II frosting degree, the grade III frosting degree is smaller than the grade IV frosting degree, and weight values of the frosting degrees are respectively set to 0.7,0.8,0.9,1 according to the grade I frosting degree, the grade II frosting degree, the grade III frosting degree and the grade IV frosting degree;
the setting the target temperature drop weight value according to the indoor target temperature drop comprises: dividing the indoor target temperature drop into a first target temperature drop gradient, a second target temperature drop gradient and a third target temperature drop gradient, wherein the first target temperature drop gradient is smaller than the second target temperature drop gradient and smaller than the third target temperature drop gradient, and setting the weight value of the target temperature drop as 0.8,0.9,1 according to the first target temperature drop gradient, the second target temperature drop gradient and the third target temperature drop gradient respectively.
11. An air conditioner defrost controller for performing the air conditioner defrost control method according to any one of claims 1 to 10.
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