CN113154620A - Compressor frequency control method and device and air conditioner - Google Patents

Compressor frequency control method and device and air conditioner Download PDF

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Publication number
CN113154620A
CN113154620A CN202110262084.6A CN202110262084A CN113154620A CN 113154620 A CN113154620 A CN 113154620A CN 202110262084 A CN202110262084 A CN 202110262084A CN 113154620 A CN113154620 A CN 113154620A
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Prior art keywords
temperature value
frequency
compressor
inner disc
preset
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CN202110262084.6A
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CN113154620B (en
Inventor
胡志文
卢艳军
应必业
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Priority to CN202110262084.6A priority Critical patent/CN113154620B/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/247—Active noise-suppression
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a compressor frequency control method and device and an air conditioner, and relates to the technical field of air conditioners. The compressor frequency control method includes: acquiring the running time of the compressor; judging whether the running time is greater than the preset time or not; if the running time is less than or equal to the preset time, controlling the air conditioner to enter an air speed frequency limiting mode; if the running time is longer than the preset time, acquiring an inner ring temperature value of the air conditioner; acquiring an inner disc temperature value of the air conditioner; and controlling the frequency of the compressor according to the temperature value of the inner ring and the temperature value of the inner disc. When the running time is less than the preset time, the frequency of the compressor is limited according to the wind speed frequency limiting mode, and when the running time exceeds the preset time, the frequency of the compressor is adjusted through the inner disc temperature value and the inner ring temperature value together, so that the noise can be reduced, the heating capacity is kept, and the experience of a user is improved.

Description

Compressor frequency control method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a compressor frequency control method and device and an air conditioner.
Background
In the heating mode, the heating capacity of the air conditioner is generally measured when the rotating speed of the inner fan is above a high wind level, so that the heating requirement of a user can be basically ensured when the inner fan is above the high wind level in the heating mode. The compressor can produce the abnormal sound noise at the working process, and the noise can be transmitted to indoor through the pipeline, if the noise that the compressor can be covered to the windage of interior fan higher, the noise that the compressor can not be covered if the windage of interior fan is lower. Generally, the use comfort of users is considered, and wind speed frequency limitation is mostly set at medium and low wind speeds and at a mute wind speed so as to reduce the frequency of the compressor at the medium and low wind speeds, reduce noise and improve the use comfort of the users. But the problem of noise when the indoor temperature value is high can be solved only according to the frequency limiting mode of the inner disc temperature value, but the heating requirement cannot be met at the same time, and therefore the experience of a user is possibly poor.
Disclosure of Invention
The invention solves the problem of how to improve the noise and the heating requirement, and improves the experience of users.
In order to solve the above problems, the present invention provides a compressor control method, a compressor control device and an air conditioner.
In a first aspect, an embodiment of the present invention provides a compressor frequency control method, which is applied to an air conditioner, and the compressor frequency control method includes:
acquiring the running time of the compressor;
judging whether the running time is greater than preset time or not;
if the running time is less than or equal to the preset time, controlling the air conditioner to enter an air speed frequency limiting mode;
if the running time is longer than the preset time, acquiring an inner ring temperature value of the air conditioner;
acquiring an inner disc temperature value of the air conditioner;
and controlling the frequency of the compressor according to the inner ring temperature value and the inner disc temperature value.
When the running time is less than the preset time, the frequency of the compressor is limited according to the wind speed frequency limiting mode, and when the running time exceeds the preset time, the frequency of the compressor is adjusted through the inner disc temperature value and the inner ring temperature value together, so that the noise can be reduced, the heating capacity is kept, and the experience of a user is improved.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the inner disk temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a first preset temperature value and less than a second preset temperature value, controlling the compressor to keep the current frequency operation.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the inner disk temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a second preset temperature value and less than a third preset temperature value, controlling the frequency of the compressor to be reduced by a fixed value.
In an alternative embodiment of the invention, after the step of controlling the frequency of the compressor to decrease by a fixed value, the compressor frequency control method further includes:
acquiring a real-time inner disc temperature value of the air conditioner;
judging whether the real-time inner disc temperature value is smaller than a fourth preset temperature value, wherein the fourth preset temperature value is smaller than the second preset temperature value;
and if the temperature value of the inner disc is less than the fourth preset temperature value, quitting the step of executing the step of controlling the frequency of the compressor to be reduced by a fixed value.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the inner disk temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a third preset temperature value and less than a fifth preset temperature value, controlling the frequency of the compressor to be reduced at a change rate.
In an alternative embodiment of the invention, the step of controlling the frequency-rate of change decrease of the compressor comprises:
acquiring a real-time inner disc temperature value of the air conditioner;
judging whether the real-time inner disc temperature value is smaller than a sixth preset temperature value, wherein the sixth preset temperature value is smaller than the third preset temperature value;
and if the inner disc temperature value is less than the sixth temperature value, the frequency of the compressor is quitted from being controlled to be reduced at a change rate.
In an alternative embodiment of the present invention, the step of controlling the frequency of the compressor according to the inner disk temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than a fifth preset temperature value, controlling the compressor to stop.
In an optional embodiment of the present invention, the step of controlling the air conditioner to enter the air speed frequency limiting mode if the operation time is less than or equal to the preset time includes:
acquiring the maximum frequency and the minimum frequency of a compressor corresponding to the current outer ring temperature value of the air conditioner;
setting the upper limit frequency of the compressor according to the maximum frequency and the wind speed; wherein the upper limit frequency set is larger as the wind speed is larger;
the minimum frequency is set to the lower limit frequency of the compressor.
In an alternative embodiment of the present invention, the step of setting the upper limit frequency of the compressor according to the maximum frequency and the wind speed comprises:
Fmax＝a1fmax；
wherein, FmaxIs the upper limit frequency, fmaxIs the maximum frequency, a1Is the corresponding frequency limiting ratio corresponding to the wind speed.
In a second aspect, an embodiment of the present invention provides a compressor frequency control device, which is applied to an air conditioner, and includes:
the time acquisition module is used for acquiring the running time of the compressor;
the judging module is used for judging whether the running time is greater than the preset time or not;
the first frequency limiting module is used for controlling the air conditioner to enter an air speed frequency limiting mode if the running time is less than or equal to the preset time;
the first obtaining module is used for obtaining the inner ring temperature value of the air conditioner if the running time is longer than the preset time;
the second acquisition module is used for acquiring the inner disc temperature value of the air conditioner;
and the second frequency limiting module is used for controlling the frequency of the compressor according to the inner ring temperature value and the inner disc temperature value.
In a third aspect, an embodiment of the present invention provides an air conditioner, where the air conditioner includes a controller, and the controller is configured to execute computer instructions to implement the compressor frequency control method provided in the first aspect.
Drawings
Fig. 1 is a block diagram of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a flowchart of a compressor frequency control method according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating sub-steps of step S300 of a compressor frequency control method according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating sub-steps of step S600 of a compressor frequency control method according to an embodiment of the present invention.
Fig. 5 is a flowchart of steps S651-S654 of a compressor frequency control method according to an embodiment of the present invention.
Fig. 6 is a flowchart illustrating steps S671 to S674 of a method for controlling a frequency of a compressor according to an embodiment of the present invention.
Fig. 7 is a block diagram of a compressor frequency control apparatus according to an embodiment of the present invention.
Description of reference numerals:
10-an air conditioner; 11-inner ring temperature sensor; 12-outer ring temperature sensor; 13-a timer; 14-a controller; 20-compressor frequency control means; 21-a time acquisition module; 22-a judgment module; 23-a first frequency limiting module; 24-a first acquisition module; 25-a second acquisition module; 26-second frequency limiting module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Examples
Referring to fig. 1, an embodiment of the present invention provides a method and an apparatus for controlling a frequency of a compressor, which are applied to an air conditioner 10, and the method and the apparatus for controlling the frequency of the compressor provided by the embodiment can adopt different frequency limiting modes according to different running times, so as to improve noise and heating requirements at the same time, and improve user experience.
In the heating mode, the heating capacity of the air conditioner 10 is generally measured when the rotation speed of the inner fan is above the high wind level, so that in the heating mode, the heating requirement of the user can be basically ensured when the inner fan is above the high wind level. The compressor can produce the abnormal sound noise at the working process, and the noise can be transmitted to indoor through the pipeline, if the noise that the compressor can be covered to the windage of interior fan higher, the noise that the compressor can not be covered if the windage of interior fan is lower. Generally, the use comfort of users is considered, and wind speed frequency limitation is mostly set at medium and low wind speeds and at a mute wind speed so as to reduce the frequency of the compressor at the medium and low wind speeds, reduce noise and improve the use comfort of the users. But the problem of noise when the indoor temperature value is high can be solved only according to the frequency limiting mode of the inner disc temperature value, but the heating requirement cannot be met at the same time, and therefore the experience of a user is possibly poor. The method and the device for controlling the frequency of the compressor provided by the embodiment adopt different frequency limiting modes according to different running times, can simultaneously solve the problems of noise and heating requirements, and improve the experience of users.
In the embodiment of the present invention, the air conditioner 10 includes an inner ring temperature sensor 11, an outer ring temperature sensor 12, a timer 13, and a controller 14, where the inner ring temperature sensor 11 is configured to detect an inner ring temperature value, the outer ring temperature sensor 12 is configured to detect an outer ring temperature value, the timer 13 is configured to accumulate an operation time of the compressor, and the controller 14 is configured to receive the operation time, the inner ring temperature value, and the outer ring temperature value, and execute a computer instruction according to the operation time, the inner ring temperature value, and the outer ring temperature value to implement the compressor frequency control method provided in this embodiment.
Referring to fig. 2, the specific steps of the compressor frequency control method are as follows:
step S100, the operation time of the compressor is acquired.
In this embodiment, the operation time of the compressor is started after the air conditioner 10 is turned on, and the operation time refers to the usage time of the compressor from the start.
Step S200, judging whether the running time is more than the preset time.
In the present embodiment, the preset time is 10 min. In the heating mode, the temperature value of the inner ring and the temperature value of the inner disc are both low during a period of time when the air conditioner 10 is just started, and in order to ensure the heating capacity of the air conditioner 10 at low indoor temperature, the compressor is usually controlled to operate at a high frequency, so that the temperature value of the inner ring can be quickly increased.
In order to increase the heating capacity at low indoor temperatures, the frequency of the compressor is usually controlled in different ways depending on the operation time.
In step S300, if the operation time is less than or equal to the preset time, the air conditioner 10 is controlled to enter the air speed limiting mode.
When the operation time is less than or equal to the preset time, that is, in the time period when the air conditioner 10 starts to operate, the indoor heating amount is not significantly increased, and the current inner ring temperature value and the current inner disc temperature value are both low, in this case, a high heating amount is required, so that the frequency of the compressor may rapidly increase to provide more heating amount, and the problem of frequency overshoot of the compressor can be avoided through the air speed frequency limiting mode.
Referring to fig. 3, step S300 may include step S310, step S320 and step S330.
In step S310, the maximum frequency and the minimum frequency of the compressor corresponding to the current outer ring temperature value of the air conditioner 10 are obtained.
The outer ring temperature value refers to a temperature value of an outdoor environment of the air conditioner 10, the frequency for controlling the air conditioner 10 may be different at different outer ring temperature values, and a frequency relation between the outer ring temperature value and the compressor is fitted in advance according to the outer ring temperature value. That is, the same outer ring temperature value corresponds to the maximum frequency and the minimum frequency of a compressor. When the compressor is in operation, the frequency of the compressor is not higher than the maximum frequency and not less than the minimum frequency.
For example: the current outer ring temperature value is 2 ℃, the maximum frequency corresponding to 2 ℃ is 60HZ, and the minimum frequency is 50 HZ. The frequency of the compressor is normally controlled to be between 60HZ and 50 HZ.
Step S320, setting the upper limit frequency of the compressor according to the maximum frequency and the wind speed; the upper limit frequency is set to be higher as the wind speed is higher.
The upper limit frequency of the compressor is set according to the maximum frequency and the wind speed, the phenomenon that the running frequency of the compressor is too large and large noise is generated under the condition that the wind speed of the inner fan is too low can be avoided, and therefore the experience of a user is improved.
Fmax＝a1fmax；
Wherein, FmaxIs the upper limit frequency, fmaxIs the maximum frequency, a1Is the corresponding frequency limiting ratio corresponding to the wind speed.
The upper frequency refers to the maximum frequency at which the compressor can be operated during operation.
Different wind speedsa1The values of (A) are also different, and the larger the wind speed is, the higher the wind speed is1The larger the value of (a). If the frequency of the compressor is higher, the generated noise is higher, and if the wind speed is lower, the noise of the compressor cannot be covered, so that the frequency of the compressor can be properly limited according to different wind speeds, and the inner fan can cover the noise transmitted by the compressor through a pipeline.
For example: if the current wind speed is the wind speed corresponding to the strong wind level, a1 Is 100%, if the current wind speed is the wind speed corresponding to the high gear, a1The value of (a) is also 100%, if the current wind speed is the wind speed corresponding to the middle gear, a1Is 90%, if the current wind speed is the wind speed corresponding to the low gear, a182%, if the current wind speed is the wind speed corresponding to the mute wind level, a1The content was 82%. The wind speeds corresponding to the strong wind shield and the high wind shield are relatively high, and the strong wind shield and the high wind shield can be regarded as high wind speeds.
Because the temperature value of the inner disk has certain hysteresis, the frequency of the compressor is limited between the maximum frequency and the minimum frequency through the wind speed frequency limit in the time period of the starting operation of the air conditioner 10, so that the frequency overshoot can be realized, and the frequency fluctuation caused by the protection frequency reduction can be avoided.
In step S330, the minimum frequency is set as the lower limit frequency of the compressor.
In this embodiment, the minimum frequency is generally small, and the noise generated when the compressor operates at the minimum frequency is small, so that the noise of the compressor can be masked even when the inner fan operates at the wind speed corresponding to the silent wind speed, and the lower limit frequency may not be further limited.
Referring to fig. 1, in step S400, if the operation time is greater than the preset time, the temperature value of the inner ring of the air conditioner 10 is obtained.
If the running time is longer than the preset time, the frequency of the compressor is limited only according to the wind speed, so that the requirement for high heating when the indoor temperature is low and the wind speed is low cannot be met, and the frequency of the compressor can be further adjusted according to the inner ring temperature value and the inner disc temperature value.
The inner ring temperature value refers to a temperature value of the indoor environment.
If the temperature of the inner ring is too high, which means that more heating is not needed, the frequency of the compressor can be properly reduced. If the inner ring temperature value is too low, indicating that more heating is required to increase the inner ring temperature value, the frequency of the compressor needs to be increased.
Step S500, an inner disk temperature value of the air conditioner 10 is obtained.
The inner disc temperature value refers to the temperature value of the coil pipe of the indoor unit, when the heat exchange medium enters the coil pipe of the indoor unit, the temperature value of the coil pipe can be gradually increased, the larger the inner disc temperature value is, the larger the heating capacity is, and the frequency of the compressor can be adjusted according to the inner disc temperature value.
For example: if the temperature value of the inner disc is too high, which indicates that the current heat exchange amount is larger, more heat surplus may exist, so that the frequency of the compressor can be properly reduced, and the heating amount is reduced. If the temperature value of the inner disc is too low, the current heat exchange amount is small, and in order to ensure that the temperature value of the inner ring is in a stable interval, the heat exchange amount needs to be increased, and the frequency of the compressor can be properly increased.
And step S600, controlling the frequency of the compressor according to the inner ring temperature value and the inner disc temperature value.
Meanwhile, according to the inner ring temperature value and the inner disc temperature value, the noise of the compressor can be reduced, indoor heating requirements can be met, and user experience is improved.
The frequency of the compressor can be adjusted according to different inner ring temperature values under different inner ring temperature values, and the steps S610 to S680 refer to a control mode under the condition that the inner ring temperature values are the same, and the larger the inner ring temperature value is, the larger the inner ring temperature value is under the same condition.
In this embodiment, the value ranges of the inner disks corresponding to the inner ring temperature value are divided into three values, which are the first inner disk protection value, the second inner disk protection value, and the third inner disk protection value, if the inner ring temperature value is greater than the first preset value, the inner disk temperature value corresponding to the first inner disk protection value is selected to control the frequency of the compressor, if the inner ring temperature value is greater than the second preset value and less than or equal to the first preset value, the inner disk temperature value corresponding to the second inner disk protection value is selected to control the frequency of the compressor, and if the inner ring temperature value is less than or equal to the second preset value, the inner disk temperature value corresponding to the third inner disk protection value is selected to control the frequency of the compressor.
Wherein the first preset value is 24 ℃, and the second preset value is 14 ℃.
That is, after the inner ring temperature value is obtained, different first preset temperature value, second preset temperature value, third preset temperature value, fourth preset temperature value, fifth preset temperature value and sixth preset temperature value are selected according to the difference of the inner ring temperature value to perform steps S610 to S680.
Referring to fig. 4, in step S610, it is determined whether the inner disk temperature value is greater than or equal to a first preset temperature value.
In this embodiment, the first preset temperature value is relatively small, the first preset temperature value of the first inner disc protection value is 55 ℃, the first preset temperature value of the second inner disc protection value is 52 ℃, and the first preset temperature value of the second inner disc protection value is 50 ℃.
Step S611, if the inner disk temperature value is less than the first preset temperature value, controlling the compressor to keep operating in the current mode.
If the inner disc temperature value is smaller than the first preset temperature value, which indicates that the current inner disc temperature value is smaller, the compressor is controlled to continue to keep the current operation mode to operate, and possibly, the compressor is in a stage of frequency increase, so that the frequency of the compressor is not limited, and more heating capacity is provided.
Step S620, if the inner disc temperature value is greater than or equal to the first preset temperature value, determining whether the inner disc temperature value is greater than or equal to a second preset temperature value.
In this embodiment, the second preset temperature value is relatively small, the second preset temperature value of the first inner disc protection value is 57 ℃, the second preset temperature value of the second inner disc protection value is 54 ℃, and the second preset temperature value of the second inner disc protection value is 52 ℃.
Step S630, if the inner disk temperature value is greater than or equal to the first preset temperature value and less than the second preset temperature value, controlling the compressor to keep operating at the current frequency.
When the temperature value of the inner disc is greater than or equal to the first preset temperature value and less than the second preset temperature value, it is indicated that although the current heating amount is still low, the heating amount can still be increased quickly by keeping the current frequency, and therefore the compressor is controlled to keep the current frequency running.
In step S640, if the inner disk temperature value is greater than or equal to the second preset temperature value, it is determined whether the inner disk temperature value is greater than or equal to a third preset temperature value.
In this embodiment, the third preset temperature value is relatively high, the third preset temperature value of the first inner disc protection value is 59 ℃, the third preset temperature value of the second inner disc protection value is 56 ℃, and the third preset temperature value of the second inner disc protection value is 54 ℃.
Referring to fig. 5, in step S651, if the inner disc temperature is greater than or equal to the second preset temperature and less than the third preset temperature, the frequency of the compressor is controlled to decrease by a fixed value.
If the temperature value of the inner disc is greater than or equal to the second preset temperature value and less than the third preset temperature value, the current temperature value of the inner disc is higher, and the residual heating capacity exists in the coil pipe of the indoor unit, the frequency of the compressor can be properly reduced, and the frequency of the compressor is controlled to be reduced by a fixed value.
The fixed value can be preset, and different fixed values can be set according to different inner disc protection values.
In step S652, a real-time inner temperature value of the air conditioner 10 is obtained.
The inner disc temperature value is detected in real time while the compressor is controlled to be reduced by a fixed value, the heating capacity corresponding to the reduction of the frequency of the compressor can be reduced along with the reduction of the frequency of the compressor, and the heating capacity in a coil pipe of the indoor unit can be monitored according to the real-time inner disc temperature value.
Step S653, determine whether the real-time internal temperature value is smaller than a fourth preset temperature value, where the fourth preset temperature value is smaller than the second preset temperature value.
The fourth preset temperature value is a value smaller than the first preset temperature value, and the frequency setting of the compressor is protected, so that the phenomenon that the heating capacity is rapidly reduced due to the fact that the frequency of the compressor is reduced too much after the step S651 is avoided, the temperature value of the inner ring is rapidly reduced, and the experience of a user is reduced.
The fourth preset temperature value of the first inner disc protection value is 53 ℃, the fourth preset temperature value of the second inner disc protection value is 50 ℃, and the fourth preset temperature value of the second inner disc protection value is 48 ℃.
In step S654, if the real-time internal temperature value is smaller than the fourth preset temperature value, the step of controlling the frequency of the compressor to decrease by a fixed value is exited.
If the real-time inner disc temperature value is smaller than the fourth preset temperature value, it indicates that the frequency of the current compressor is reduced too fast, the heating capacity in the coil pipe of the indoor unit is reduced too fast, and the step S651 needs to be exited without limiting the frequency of the compressor, so that the heating capacity in the coil pipe is improved.
And if the real-time inner disk temperature value is greater than or equal to the fourth preset temperature value, continuing to execute the step of controlling the frequency of the compressor to decrease by a fixed value.
If the real-time inner disk temperature value is greater than or equal to the fourth preset temperature value, the current temperature is relatively high, and the frequency of the compressor can be reduced, so that the noise generated by the operation of the compressor can be reduced.
Referring to fig. 4, in step S660, if the inner disc temperature is greater than or equal to the third preset temperature, it is determined whether the inner disc temperature is greater than or equal to the fifth preset temperature.
When the temperature value of the inner disc is higher than the third preset temperature value, it is said that the frequency of the compressor is too high, and it is necessary to further judge whether the temperature value is higher than the fifth preset temperature value.
The fifth preset temperature value of the first inner disc protection value is 62 ℃, the fifth preset temperature value of the second inner disc protection value is 59 ℃, and the fifth preset temperature value of the second inner disc protection value is 57 ℃.
Referring to fig. 6, in step S671, under the condition of the preset inner ring temperature value, if the inner disc temperature value is greater than the third preset temperature value and less than the fifth preset temperature value, the frequency of the compressor is controlled to decrease at a change rate.
If the inner disc temperature value is greater than the third preset temperature value and less than or equal to the fifth preset temperature value, the current inner disc temperature value is too high, but the inner disc temperature value can be controlled by further adjusting the frequency of the compressor. The frequency of the compressor needs to be controlled down at a faster rate. The rate of change may decrease exponentially.
Step S672, a real-time inner temperature value of the air conditioner 10 is obtained.
The inner disc temperature value is detected in real time while the compressor is controlled to be reduced by a fixed value, the heating capacity corresponding to the reduction of the frequency of the compressor can be reduced along with the reduction of the frequency of the compressor, and the heating capacity in a coil pipe of the indoor unit can be monitored according to the real-time inner disc temperature value.
Step S673, judging whether the real-time inner disk temperature value is smaller than a sixth preset temperature value, wherein the sixth preset temperature value is smaller than a third preset temperature value.
The sixth preset temperature value is a value smaller than the first preset temperature value, and the frequency setting of the compressor is protected, so that the phenomenon that the heating capacity is rapidly reduced due to the fact that the frequency of the compressor is reduced too much after the step S651 is avoided, the temperature value of the inner ring is rapidly reduced, and the experience of a user is reduced.
The sixth preset temperature value of the first inner disc protection value is 53 ℃, the sixth preset temperature value of the second inner disc protection value is 50 ℃, and the sixth preset temperature value of the second inner disc protection value is 48 ℃.
In step S674, if the inner disk temperature value is less than the sixth temperature value, the frequency of exiting the control compressor is decreased by a change rate.
And if the temperature value of the inner disk is greater than or equal to the sixth temperature value, continuing to execute the step of controlling the frequency of the compressor to decrease at a change rate.
If the real-time inner disc temperature value is smaller than the sixth preset temperature value, it indicates that the frequency of the current compressor is reduced too fast, the heating capacity in the coil pipe of the indoor unit is reduced too fast, and the step S67 needs to be exited, the frequency of the compressor is not limited, and therefore the heating capacity in the coil pipe is improved.
And if the real-time inner disk temperature value is greater than or equal to the sixth preset temperature value, continuing to execute the step of controlling the frequency of the compressor to decrease at a change rate.
If the real-time inner disk temperature value is greater than or equal to the sixth preset temperature value, the current temperature is relatively high, and the frequency of the compressor can be reduced, so that the noise generated by the operation of the compressor can be reduced.
It is easily understood that steps S672 to S674 are the same as the control logic of steps S652 to S654, and reference may be made to steps S652 to S654 to perform steps S672 to S674.
Referring to fig. 4, in step S680, if the inner disc temperature is greater than or equal to a fifth preset temperature, the compressor is controlled to stop.
In this embodiment, if the inner disc temperature value is greater than or equal to the fifth preset temperature value, it indicates that the current inner disc temperature value is too high, which indicates that the current compressor frequency is too high, and a large amount of residual heat is stored in the coil pipe of the indoor unit, so that the indoor unit can be shut down first, and the residual heat can maintain the inner ring temperature value for a period of time.
In summary, according to the method for controlling the frequency of the compressor provided by the embodiment, in the embodiment, when the operation time is less than the preset time, the maximum frequency and the minimum frequency of the compressor are limited according to the wind speed frequency limiting mode, and when the operation time exceeds the preset time, the frequency of the compressor is adjusted through the inner disc temperature value and the inner ring temperature value together, so that the noise can be reduced, the heating capacity is maintained, and the user experience is improved.
Referring to fig. 7, an embodiment of the present invention further provides a compressor frequency control device 20, which is applied to an air conditioner 10, and the compressor frequency control device 20 includes:
and a time obtaining module 21 for obtaining the running time of the compressor.
Step S100 of the compressor frequency control method provided by the embodiment of the present invention may be executed by the time obtaining module 21.
And the judging module 22 is used for judging whether the running time is greater than the preset time.
Step S200 of the compressor frequency control method provided by the embodiment of the present invention may be executed by the determining module 22.
The first frequency limiting module 23 controls the air conditioner 10 to enter the air speed frequency limiting mode if the operation time is less than or equal to the preset time.
Step S300 and its substeps of the compressor frequency control method provided by the embodiment of the present invention may be executed by the first frequency limiting module 23.
The first obtaining module 24 is configured to obtain an inner ring temperature value of the air conditioner 10 if the operation time is greater than the preset time.
Step S400 of the compressor frequency control method provided by the embodiment of the present invention may be executed by the first obtaining module 24.
And a second obtaining module 25, configured to obtain an inner disc temperature value of the air conditioner 10.
Step S500 of the compressor frequency control method provided by the embodiment of the present invention may be executed by the second obtaining module 25.
And the second frequency limiting module 26 is used for controlling the frequency of the compressor according to the inner ring temperature value and the inner disc temperature value.
Step S600 and its sub-steps of the compressor frequency control method provided by the embodiment of the present invention may be executed by the second frequency limiting module 26.
In the embodiment of the present invention, the air conditioner 10 includes a controller 14, and the controller 14 may be an integrated circuit chip having signal processing capability. The controller 14 may be a general-purpose processor, and may include a Central Processing Unit (CPU), a single chip Microcomputer (MCU), a Micro Controller Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an embedded ARM, and other chips, where the controller 14 may implement or execute the methods, steps, and Logic blocks disclosed in the embodiments of the present invention.
In one possible implementation, the air conditioner 10 may further include a memory for storing program instructions executable by the controller 14, for example, the compressor frequency control device 20 provided by the embodiment of the present application may include at least one of software and firmware stored in the memory. The Memory may be a stand-alone external Memory including, but not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM). The memory may also be integrated with the controller 14, for example, the memory may be integrated with the controller 14 on the same chip.
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 (11)

1. A compressor frequency control method applied to an air conditioner (10), characterized by comprising:
acquiring the running time of the compressor;
judging whether the running time is greater than preset time or not;
if the running time is less than or equal to the preset time, controlling the air conditioner (10) to enter an air speed frequency limiting mode;
if the running time is longer than the preset time, acquiring an inner ring temperature value of the air conditioner (10); acquiring an inner disc temperature value of the air conditioner (10);
and controlling the frequency of the compressor according to the inner ring temperature value and the inner disc temperature value.
2. The compressor frequency control method as claimed in claim 1, wherein the step of controlling the frequency of the compressor according to the inner disc temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a first preset temperature value and less than a second preset temperature value, controlling the compressor to keep the current frequency operation.
3. The compressor frequency control method as claimed in claim 1, wherein the step of controlling the frequency of the compressor according to the inner disc temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a second preset temperature value and less than a third preset temperature value, controlling the frequency of the compressor to be reduced by a fixed value.
4. The compressor frequency control method as claimed in claim 3, wherein after the step of controlling the frequency of the compressor to be decreased by a fixed value, the compressor frequency control method further comprises:
acquiring a real-time inner disc temperature value of the air conditioner (10);
judging whether the real-time inner disc temperature value is smaller than a fourth preset temperature value, wherein the fourth preset temperature value is smaller than the second preset temperature value;
and if the temperature value of the inner disc is less than the fourth preset temperature value, quitting the step of executing the step of controlling the frequency of the compressor to be reduced by a fixed value.
5. The compressor frequency control method as claimed in claim 1, wherein the step of controlling the frequency of the compressor according to the inner disc temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a third preset temperature value and less than a fifth preset temperature value, controlling the frequency of the compressor to be reduced at a change rate.
6. The compressor frequency control method as claimed in claim 5, wherein the step of controlling the frequency-rate of change decrease of the compressor comprises:
acquiring a real-time inner disc temperature value of the air conditioner (10);
judging whether the real-time inner disc temperature value is smaller than a sixth preset temperature value, wherein the sixth preset temperature value is smaller than the third preset temperature value;
and if the inner disc temperature value is less than the sixth temperature value, the frequency of the compressor is quitted from being controlled to be reduced at a change rate.
7. The compressor frequency control method as claimed in claim 1, wherein the step of controlling the frequency of the compressor according to the inner disc temperature value includes:
and under the condition of presetting an inner ring temperature value, if the inner disc temperature value is greater than or equal to a fifth preset temperature value, controlling the compressor to stop.
8. The compressor frequency control method according to claim 1, wherein the step of controlling the air conditioner (10) to enter an air speed frequency limit mode if the operation time is less than or equal to the preset time comprises:
acquiring the maximum frequency and the minimum frequency of a compressor corresponding to the current outer ring temperature value of the air conditioner (10);
setting the upper limit frequency of the compressor according to the maximum frequency and the wind speed; wherein the upper limit frequency set is larger as the wind speed is larger;
the minimum frequency is set to the lower limit frequency of the compressor.
9. The compressor frequency control method as claimed in claim 1, wherein the step of setting the upper limit frequency of the compressor according to the maximum frequency and the wind speed comprises:
Fmax＝a1fmax；
wherein, FmaxIs the upper limit frequency, fmaxIs the maximum frequency, a1Is the corresponding frequency limiting ratio corresponding to the wind speed.
10. A compressor frequency control device applied to an air conditioner (10), characterized in that the compressor frequency control device (20) comprises:
a time acquisition module (21) for acquiring the running time of the compressor;
the judging module (22) is used for judging whether the running time is greater than the preset time or not;
the first frequency limiting module (23) is used for controlling the air conditioner (10) to enter an air speed frequency limiting mode if the running time is less than or equal to the preset time;
a first obtaining module (24) for obtaining an inner ring temperature value of the air conditioner (10) if the operation time is greater than the preset time;
the second acquisition module (25) is used for acquiring the inner disc temperature value of the air conditioner (10);
and the second frequency limiting module (26) is used for controlling the frequency of the compressor according to the inner ring temperature value and the inner disc temperature value.
11. An air conditioner characterized by comprising a controller (14), the controller (14) being configured to execute computer instructions to implement the compressor frequency control method according to any one of claims 1-9.
CN202110262084.6A 2021-03-10 2021-03-10 Compressor frequency control method and device and air conditioner Active CN113154620B (en)

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