CN110173852B - Frequency control method of air conditioner and air conditioner - Google Patents

Frequency control method of air conditioner and air conditioner Download PDF

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CN110173852B
CN110173852B CN201910454447.9A CN201910454447A CN110173852B CN 110173852 B CN110173852 B CN 110173852B CN 201910454447 A CN201910454447 A CN 201910454447A CN 110173852 B CN110173852 B CN 110173852B
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air conditioner
temperature
frequency
correction mode
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CN110173852A (en
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李海利
秦宪
左泽明
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Ningbo Aux Electric Co Ltd
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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
    • 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
    • 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
    • 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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Abstract

The invention provides a frequency control method of an air conditioner, which comprises the following steps: and controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the running state of the air conditioner, the temperature constraint constant corresponding to the running state and the temperature of the air outlet. According to the invention, by increasing the temperature constraint constant and the air outlet temperature, the working frequency of the air conditioner can be accurately controlled to execute a corresponding correction mode, so that when the air conditioner is in a cooling or heating mode, the running comfort can be improved while the rapid cooling or heating is ensured, and the experience of a user is improved.

Description

Frequency control method of air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a frequency control method of an air conditioner and the air conditioner.
Background
The technical trend of the existing variable frequency air conditioner is comfort and health, most of control mainly uses the temperature difference between the set temperature and the environment temperature to control the frequency, so as to achieve the effect of rapid cooling, but the actual air conditioner has the refrigeration air-out temperature of below 10 ℃, even below 7 ℃, the heating air-out temperature of below 35 ℃, even below 32 ℃, the long-time running comfort is poor, and air conditioner diseases are easily caused. It can be seen that there is a need to provide a frequency control method to solve the above problems.
Disclosure of Invention
The invention solves the problem of how to improve comfort while ensuring rapid cooling or heating when the air conditioner is in a cooling or heating mode, thereby improving the experience of users.
In order to solve the above problems, the present invention provides a frequency control method of an air conditioner, comprising: and controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the running state of the air conditioner, the temperature constraint constant corresponding to the running state and the temperature of the air outlet. The temperature constraint constant and the air outlet temperature are increased, the working frequency of the air conditioner can be accurately controlled to execute a corresponding correction mode, when the air conditioner is in a refrigeration or heating mode, rapid cooling or heating is guaranteed, meanwhile, the operation comfort can be improved, and the experience of a user is improved.
Further, according to the operating state of the air conditioner, the temperature constraint constant corresponding to the operating state, and the air outlet temperature, controlling the operating frequency of the air conditioner to execute a corresponding correction mode, including: judging the running state of the air conditioner; determining a temperature difference between the temperature constraint constant and the outlet air temperature after the running time of a compressor of the air conditioner reaches a first time D1; and controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the temperature difference.
Further, the operation state comprises a heating state and a cooling state, and the temperature constraint constant comprises a heating air-out temperature constraint constant TRAnd the constraint constant T of the cooling air outlet temperatureLDetermining a temperature difference between the temperature constraint constant and the outlet air temperature after the operation time of the compressor of the air conditioner reaches a first time D1, wherein the temperature difference comprises a first temperature difference and a second temperature difference, and the temperature difference comprises: when the running state is a refrigeration state, determining the refrigeration outlet air temperature constraint constant TLWith said outlet temperature TBIs equal to T, and the first temperature difference Δ T1L-TB(ii) a When the operation state is a heating state, determining the heating air-out temperature constraint constant TRWith said outlet temperature TBSecond temperature difference Δ T2 ═ TB-TR. According to the invention, the refrigeration and heating air-out temperature constraint constants are introduced, and the correction control of the running frequency of the outer machine compressor is carried out by judging the difference value between the air-out temperature and the air-out temperature constraint constant, so that the air conditioner is prevented from overcooling or overheating air-out during refrigeration or heating, the experience of users is improved, and the probability of air conditioner diseases is reduced.
Further, according to the temperature difference, controlling the operating frequency of the air conditioner to execute a corresponding correction mode, including: when the first temperature difference delta T1 is smaller than a preset temperature value T, controlling the working frequency of the air conditioner to execute a first correction mode; when the delta T1 is more than or equal to T, controlling the working frequency of the air conditioner to execute a second correction mode; when the second temperature difference delta T2 is less than T, controlling the working frequency of the air conditioner to execute a third correction mode; and when the delta T2 is more than or equal to T, controlling the working frequency of the air conditioner to execute a fourth correction mode. According to the relationship between the first temperature difference, the second temperature difference and T, the working frequency of the air conditioner is controlled to execute a corresponding correction mode, control of different correction modes under different conditions is achieved, and the air conditioner can run quickly and comfortably.
Further, controlling the operating frequency of the air conditioner to execute a first correction mode includes: determining indoor ambient temperature TAAnd a predetermined temperature TSIs equal to T, and the third temperature difference Δ T3A-TS(ii) a Determining a target cooling operation frequency FL according to the delta T3, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the minimum cooling operation limit frequency FLC：
Figure GDA0003241557430000021
Further, controlling the operating frequency of the air conditioner to execute a second correction mode includes:
determining indoor ambient temperature TAAnd a predetermined temperature TSIs equal to T, and the third temperature difference Δ T3A-TS；
Determining a target refrigerating operation frequency FL according to the delta T3, the frequency reduction coefficient K1, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the lowest refrigerating operation limit frequency FLC’：
Figure GDA0003241557430000031
Wherein, the frequency-reducing coefficient K1 satisfies the formula K1 ═ TB/2TL(ii) a Air conditioner with FLCRun for current operating frequency up to TB≥TM. When in refrigeration, the frequency reduction coefficient K1 is increased, and the K1 deviates from TLThe more, the larger the frequency reduction amplitude is, and the T is finally enabled through frequency adjustmentBGreater than TLAnd the refrigeration efficiency is ensured.
Further, after controlling the operating frequency of the air conditioner to execute the second correction mode, the method further comprises the following steps: and the air conditioner reaches a fourth time D4 by taking the FLC' as the running time of the current working frequency, and the working frequency of the air conditioner is controlled to execute a corresponding correction mode. Therefore, the phenomenon that the comfort is influenced by overlarge indoor temperature fluctuation caused by rapid frequency reduction can be avoided.
Further, controlling the operating frequency of the air conditioner to execute a third correction mode, comprising: determining a preset temperature TSTemperature T of indoor environmentAIs equal to T, and the fourth temperature difference Δ T4S-TA(ii) a Determining a heating target operation frequency FH according to the maximum upper limit frequency FCH and the heating minimum operation limit frequency FH corresponding to the delta T4 and the outdoor temperatureC：
Figure GDA0003241557430000032
Further, controlling the operating frequency of the air conditioner to execute a fourth correction mode, comprising: determining a preset temperature TSTemperature T of indoor environmentAIs equal to T, and the fourth temperature difference Δ T4S-TA(ii) a Determining a heating target operation frequency FH according to the delta T4, the frequency increasing coefficient K2, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the heating minimum operation limit frequency FHC’：
Figure GDA0003241557430000033
Wherein, K2 ═ TR/2TB(ii) a Air conditioner with FHCRun for current operating frequency up to TB≥TN. When heating, increasing the frequency increasing coefficient K2, K2 deviating from TRThe more, the larger the ascending frequency amplitude is, and finally T is adjusted through frequencyBGreater than TRAnd the heating efficiency is ensured.
Further, after controlling the operating frequency of the air conditioner to execute the fourth correction mode, the method further comprises the following steps: and controlling the working frequency of the air conditioner to execute a corresponding correction mode when the running time of the air conditioner with the FHC' as the current working frequency reaches a fifth time D5. Therefore, the phenomenon that the comfort is influenced by overlarge indoor temperature fluctuation caused by rapid frequency rise can be avoided.
An air conditioner comprising: a memory for storing executable instructions; and the processor is used for executing the frequency control method of the air conditioner according to the executable instructions in the memory.
Compared with the prior art, the air conditioner and the frequency control method of the air conditioner have the same advantages, and are not repeated herein.
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FIG. 1 is a schematic view illustrating the substeps of step S of a frequency control method of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the sub-step of S2 in FIG. 1;
fig. 3 is a schematic diagram illustrating the sub-step of S3 in fig. 1.
Detailed Description
In view of the fact that the conventional inverter air conditioner is poor in running comfort during long time periods of cooling and heating and is prone to causing air conditioner diseases, the invention provides a frequency control method of an air conditioner, which can accurately control the working frequency of the air conditioner to execute a corresponding correction mode by increasing a temperature constraint constant and the temperature of an air outlet, so that when the air conditioner is in a cooling or heating mode, the running comfort can be improved while the rapid cooling or heating is ensured, and the experience of a user is improved.
The embodiment of the invention provides a frequency control method of an air conditioner, which comprises the following steps: and controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the running state of the air conditioner, the temperature constraint constant corresponding to the running state and the temperature of the air outlet. Therefore, the temperature constraint constant and the air outlet temperature are increased, the working frequency of the air conditioner can be accurately controlled to execute a corresponding correction mode, when the air conditioner is in a refrigeration or heating mode, the air conditioner can ensure rapid cooling or heating, meanwhile, the operation comfort can be improved, and the experience of a user is improved.
Fig. 1 is a schematic view illustrating substeps of step S of a frequency control method of an air conditioner according to an embodiment of the present invention, and as shown in fig. 1, step S may include the following substeps:
s1, judging the running state of the air conditioner;
s2, when the compressor starting operation time of the air conditioner is the first time D1, determining the temperature difference between the temperature constraint constant and the air outlet temperature;
and S3, controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the temperature difference.
Considering that the compressor can reach a stable state only after running for a period of time, at the moment, the temperature of the air outlet is accurate, and the temperature difference between the temperature constraint constant and the temperature of the air outlet is more accurate, so that the value range of D1 can be [30min, 40min ].
After the air conditioner operates for the first time D1 and is in a stable state, the working frequency of the air conditioner is controlled and corrected through the temperature difference between the temperature constraint constant and the temperature of the air outlet, so that the air outlet temperature is maintained in a range which can be accepted by a user, and the experience of the user is improved.
The operation state comprises a heating state and a cooling state, and the temperature constraint constant comprises a heating air-out temperature constraint constant TRAnd the constraint constant T of the cooling air outlet temperatureLThe temperature difference includes a first temperature difference and a second temperature difference. Fig. 2 is a schematic view of the sub-step S2 in fig. 1, and as shown in fig. 2, the step S2 may include:
s21, when the running state is a refrigeration state, determining the refrigeration outlet air temperature constraint constant TLWith said outlet temperature TBIs equal to T, and the first temperature difference Δ T1L-TB；
S22, when the operation state is a heating state, determining the constraint constant T of the heating air-out temperatureRWith said outlet temperature TBSecond temperature difference Δ T2 ═ TB-TR。
According to the invention, the refrigeration and heating air-out temperature constraint constants are introduced, and the correction control of the running frequency of the outer machine compressor is carried out by judging the difference value between the air-out temperature and the air-out temperature constraint constant, so that the air conditioner is prevented from overcooling or overheating air-out during refrigeration or heating, the experience of users is improved, and the probability of air conditioner diseases is reduced.
Wherein, TLAnd TRThe value of (a) is taken into consideration of the feeling of the user on the air outlet temperature of the air conditioner, and the influence on the experience feeling, T, of the user is preventedLThe value range of the temperature can be more than or equal to T at 9 DEG CLLess than or equal to 10 ℃; the T isRThe value range of T can be more than or equal to 32 DEG CL≤34℃。
Fig. 3 is a schematic diagram illustrating the sub-steps of S3 in fig. 1, and as shown in fig. 3, the step S3 may include the steps of:
s31, when the first temperature difference delta T1 is less than the preset temperature value T, controlling the working frequency of the air conditioner to execute a first correction mode;
s32, when the delta T1 is larger than or equal to T, controlling the working frequency of the air conditioner to execute a second correction mode;
s33, when the second temperature difference delta T2 is less than T, controlling the working frequency of the air conditioner to execute a third correction mode;
and S34, when the delta T2 is more than or equal to T, controlling the working frequency of the air conditioner to execute a fourth correction mode.
According to the relationship between the first temperature difference, the second temperature difference and the preset temperature value T, the working frequency of the air conditioner is controlled to execute a corresponding correction mode, control of different correction modes under different conditions is achieved, and the air conditioner can operate quickly and comfortably. Wherein the value range of T can be [ 0-1 ℃).
In the process of refrigeration, in order to ensure the refrigeration efficiency, the frequency reduction coefficients K1 and K1 are increased to deviate from TLThe more, the larger the frequency reduction amplitude is, and the T is finally enabled through frequency adjustmentBGreater than TLStep S31 may include:
s311, determining indoor environment temperature TAAnd a predetermined temperature TSIs equal to T, and the third temperature difference Δ T3A-TS；
S312, according to the delta T3, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the refrigeration minimum operation limiting frequencyRate FL, determining cooling target operation frequency FLC：
Figure GDA0003241557430000061
Wherein, consider when Δ T3 is at (-2, -1)]According to the continuous operation time of the air conditioner, the target operation frequency FL of the refrigerationCThere are different values, therefore, a second time D2 is set for FLCFor example, the value of D2 may range from 50min to 60 min.
Step S32 may include:
s321, determining indoor environment temperature TAAnd a predetermined temperature TSIs equal to T, and the third temperature difference Δ T3A-TS；
S322, determining a target cooling operation frequency FL according to the delta T3, the frequency reduction coefficient K1, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the minimum cooling operation limit frequency FLC’：
Figure GDA0003241557430000071
Wherein, the frequency-reducing coefficient K1 satisfies the formula K1 ═ TB/2TL；
Similar to step S312, consider when Δ T3 is at (-2, -1)]According to the continuous operation time of the air conditioner, the target operation frequency FL of the refrigerationC' there are different values, therefore, a third time D3 is set for FLC' the value of D3 can range from 50min to 60min, for example.
S323, air conditioner with FLCRun for current operating frequency up to TB≥TM。
Further, TMThe range of T is more than or equal to 12 DEG CMI4 ℃ is less than or equal to, thereby ensuring the refrigeration requirement and the operation comfort.
After S323, S234 may be further included: and the air conditioner reaches a fourth time D4 by taking the FLC' as the running time of the current working frequency, and the working frequency of the air conditioner is controlled to execute a corresponding correction mode. Therefore, the phenomenon that the comfort is influenced by overlarge indoor temperature fluctuation caused by rapid frequency reduction can be avoided. The value interval of D4 can be [3min, 5min ], so that the air conditioner can keep running for a certain time by taking FLC' as the working frequency to reach a stable state, and then the working frequency of the air conditioner is corrected, thereby preventing the sudden change of the running frequency of the air conditioner when the air conditioner is not in stable running and ensuring the normal running of the air conditioner.
Step S33 may include:
s331, determining a preset temperature TSTemperature T of indoor environmentAIs equal to T, and the fourth temperature difference Δ T4S-TA；
S332, determining a heating target operation frequency FH according to the maximum upper limit frequency FCH and the heating minimum operation limit frequency FH corresponding to the delta T4 and the outdoor temperatureC：
Figure GDA0003241557430000072
In heating, in order to ensure heating efficiency, the frequency raising coefficients K2 and K2 are increased to deviate from TRThe more, the larger the ascending frequency amplitude is, and finally T is adjusted through frequencyBGreater than TRStep S34 may include:
s341, determining the preset temperature TSTemperature T of indoor environmentAIs equal to T, and the fourth temperature difference Δ T4S-TA；
S342, determining a heating target operation frequency FH according to the delta T4, the frequency increasing coefficient K2, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the heating minimum operation limit frequency FHC’：
Figure GDA0003241557430000081
Wherein, K2 ═ TR/2TB；
S343, air conditioner with FHCRun for current operating frequency up to TB≥TN。
Further, TNThe range of T is more than or equal to 36 DEG CN≤38℃。TNThe selection of (2) ensures the refrigeration requirement and the operation comfort.
After step S343, step S344 may be further included, where the air conditioner operates at the FHC' as the current operating frequency for a fifth time D5, and the operating frequency of the air conditioner is controlled to execute a corresponding correction mode. Therefore, the phenomenon that the comfort is influenced by overlarge indoor temperature fluctuation caused by rapid frequency rise can be avoided. Wherein, the value interval of D5 can be [3min, 5min ].
An embodiment of the present invention further provides an air conditioner, including: a memory for storing executable instructions; and the processor is used for executing the frequency control method of the air conditioner according to the executable instructions in the memory. Since the air conditioner and the frequency control method of the air conditioner have the same advantages compared with the prior art, the description is omitted.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. A frequency control method of an air conditioner is characterized by comprising the following steps:
controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the running state of the air conditioner, the temperature constraint constant corresponding to the running state and the air outlet temperature, wherein the correction mode comprises the following steps:
judging the running state of the air conditioner;
determining a temperature difference between the temperature constraint constant and the outlet air temperature after the running time of a compressor of the air conditioner reaches a first time D1;
controlling the working frequency of the air conditioner to execute a corresponding correction mode according to the comparison result of the temperature difference and a preset temperature value T;
wherein controlling the operating frequency of the air conditioner to execute a third correction mode includes:
determining a preset temperature TSA fourth temperature difference Δ T4 from the indoor ambient temperature TAS-TA；
Determining a heating target operation frequency FH according to the maximum upper limit frequency FCH and the heating minimum operation limit frequency FH corresponding to the delta T4 and the outdoor temperatureC：
Figure FDA0003241557420000011
Wherein controlling the operating frequency of the air conditioner to execute a fourth correction mode includes:
determining a preset temperature TSA fourth temperature difference Δ T4 from the indoor ambient temperature TAS-TA；
Determining a heating target operation frequency FH according to the delta T4, the frequency increasing coefficient K2, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the heating minimum operation limit frequency FHC’：
Figure FDA0003241557420000012
Wherein, K2 ═ TR/2TBSaid T isRThe value range of T is more than or equal to 32 DEG CR≤34℃；
Air conditioner with FHCRun for current operating frequency up to TB≥TN，TNThe range of T is more than or equal to 36 DEG CN≤38℃；
After the fourth correction mode is executed by controlling the working frequency of the air conditioner, the method further comprises the following steps:
air conditioner with FHC' controlling the operating frequency of the air conditioner to execute a corresponding correction mode when the operating time of the current operating frequency reaches a fifth time D5;
wherein the operationThe state comprises a heating state and a cooling state, and the temperature constraint constant comprises a heating air-out temperature constraint constant TRAnd the constraint constant T of the cooling air outlet temperatureLThe temperature difference comprises a first temperature difference and a second temperature difference; t isLThe value range of T is more than or equal to 9 DEG CLLess than or equal to 10 ℃; the T isRThe value range of T is more than or equal to 32 DEG CL≤34℃；
Determining a temperature difference between the temperature constraint constant and the outlet temperature after the operating time of the compressor of the air conditioner reaches a first time D1, including:
when the running state is a refrigeration state, determining the refrigeration outlet air temperature constraint constant TLWith said outlet temperature TBIs equal to T, and the first temperature difference Δ T1L-TB；
When the operation state is a heating state, determining the heating air-out temperature constraint constant TRWith said outlet temperature TBSecond temperature difference Δ T2 ═ TB-TR。
2. The method as claimed in claim 1, wherein controlling the operating frequency of the air conditioner to perform a corresponding correction mode according to the temperature difference comprises:
controlling the operating frequency of the air conditioner to execute a first correction mode when the first temperature difference Δ T1< a predetermined temperature value T;
when the delta T1 is more than or equal to T, controlling the working frequency of the air conditioner to execute a second correction mode;
when the second temperature difference delta T2 is less than T, controlling the working frequency of the air conditioner to execute a third correction mode;
and when the delta T2 is more than or equal to T, controlling the working frequency of the air conditioner to execute a fourth correction mode.
3. The frequency control method of an air conditioner according to claim 1, wherein controlling the operating frequency of the air conditioner to perform a first correction mode comprises:
determining indoor ambient temperature TAAnd a predetermined temperature TSIs equal to T, and the third temperature difference Δ T3A-TS；
Determining a target cooling operation frequency FL according to the delta T3, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the minimum cooling operation limit frequency FLC：
Figure FDA0003241557420000031
4. The frequency control method of an air conditioner according to claim 1, wherein controlling the operating frequency of the air conditioner to perform a second correction mode comprises:
determining indoor ambient temperature TAAnd a predetermined temperature TSIs equal to T, and the third temperature difference Δ T3A-TS；
Determining a target refrigerating operation frequency FL according to the delta T3, the frequency reduction coefficient K1, the maximum upper limit frequency FCH corresponding to the outdoor temperature and the lowest refrigerating operation limit frequency FLC’：
Figure FDA0003241557420000032
Wherein, the frequency-reducing coefficient K1 satisfies the formula K1 ═ TB/2TL；
Air conditioner with FLCRun for current operating frequency up to TB≥TM，TMThe range of T is more than or equal to 12 DEG CM≤14℃。
5. The frequency control method of an air conditioner according to claim 4, wherein after controlling the operating frequency of the air conditioner to perform the second correction mode, further comprising the steps of: air conditioner with FLC' controlling the operating frequency of the air conditioner to perform a corresponding correction mode when the operating time of the current operating frequency reaches a fourth time D4.
6. An air conditioner, comprising:
a memory for storing executable instructions;
a processor for executing the frequency control method of the air conditioner according to any one of claims 1 to 5, according to the executable instructions in the memory.
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