CN111780354A - Frequency reduction control method of variable frequency air conditioner and variable frequency air conditioner - Google Patents
Frequency reduction control method of variable frequency air conditioner and variable frequency air conditioner Download PDFInfo
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- CN111780354A CN111780354A CN202010606469.5A CN202010606469A CN111780354A CN 111780354 A CN111780354 A CN 111780354A CN 202010606469 A CN202010606469 A CN 202010606469A CN 111780354 A CN111780354 A CN 111780354A
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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
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. 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
- F24F2110/12—Temperature of the outside air
Abstract
The invention belongs to the field of air conditioners, and particularly discloses a frequency reduction control method of a variable frequency air conditioner, wherein the air conditioner is provided with a plurality of frequency reduction modes and a plurality of outdoor environment temperature reference ranges, and the plurality of outdoor environment temperature reference ranges are not overlapped with each other; different frequency reduction modes correspond to different compressor current control thresholds at the same outdoor environment temperature; the same frequency reduction mode corresponds to different compressor current control thresholds under different outdoor environment temperature reference ranges; after the frequency reduction instruction is received, determining the reference range of the outdoor environment temperature of the frequency reduction instruction according to the detected current outdoor environment temperature, determining the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature, and correspondingly controlling the compressor according to the current control threshold. The control method of the invention controls the frequency of the compressor and reduces the power of the whole machine by combining the mode current control and the temperature-division zone current control, thereby achieving the purpose of reducing the power consumption.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a frequency reduction control method of a variable frequency air conditioner and the variable frequency air conditioner.
Background
The starting power of the compressor is an important parameter of the air conditioner, and whether the energy of the air conditioner is saved or not is an important index for measuring products by users. Generally, users judge the energy saving degree of an air conditioner through an energy efficiency ratio. At present, due to special conditions of part of under-developed countries, air conditioners with reduced power are developed in the market part to control power consumption so as to meet the power grid supply requirements of the countries.
However, in the existing air conditioner with the power or power consumption reduction function in the industry at present, the total current or total power of the air conditioner is directly controlled by a difference value which is not more than a certain value so as to achieve a certain power reduction effect. In fact, when the air conditioner operates under different working conditions, the power and the current of the air conditioner under different environmental working conditions are greatly different due to different environmental loads, so that the frequency reduction mode cannot reach a uniform and qualitative standard and cannot realize a qualitative power reduction effect under different working conditions, and the power consumption of the air conditioner after frequency reduction is greatly different along with the change of the environmental temperature and cannot be maintained.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a control method of a variable frequency air conditioner, which controls the frequency of a compressor and reduces the power of the whole machine by combining mode current control and temperature division zone current control so as to achieve the purpose of reducing the power consumption.
The invention provides a frequency reduction control method of a variable frequency air conditioner, wherein the air conditioner is provided with a plurality of frequency reduction modes and a plurality of outdoor environment temperature reference ranges, and the plurality of outdoor environment temperature reference ranges are not overlapped with each other; different frequency reduction modes correspond to different compressor current control thresholds at the same outdoor environment temperature; the same frequency reduction mode corresponds to different compressor current control thresholds under different outdoor environment temperature reference ranges;
after the frequency reduction instruction is received, determining the reference range of the outdoor environment temperature of the frequency reduction instruction according to the detected current outdoor environment temperature, determining the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature, and correspondingly controlling the compressor according to the current control threshold.
Further optionally, after receiving the instruction, detecting a current of the compressor, and when the detected current of the compressor is greater than a current control threshold of the compressor in the frequency-down mode, controlling the compressor to perform frequency-down until the current of the compressor reaches the current control threshold in the frequency-down mode, and stopping the frequency-down and maintaining the current frequency of the compressor.
Further optionally, the frequency-down modes include a primary frequency-down mode, a secondary frequency-down mode, and a tertiary frequency-down mode, wherein power consumption of the air conditioner in the primary frequency-down mode is less than power consumption of the air conditioner in the secondary frequency-down mode is less than power consumption of the air conditioner in the tertiary frequency-down mode.
Further optionally, when the down-conversion mode in the down-conversion instruction is a one-stage down-conversion mode, controlling the compressor to stop; when the frequency reduction mode in the frequency reduction command is a two-stage frequency reduction mode and a three-stage frequency reduction mode, outdoor environment temperature and compressor current detection is carried out.
Further optionally, the current control threshold in the secondary down-conversion mode is less than the current control threshold in the tertiary down-conversion mode.
Further optionally, the plurality of outdoor ambient temperature reference ranges form a continuous temperature interval.
Further optionally, setting the plurality of outdoor environment temperature reference ranges as a low temperature zone, a medium temperature zone and a high temperature zone according to the temperature;
and setting the current control threshold value in the low-temperature region to be I1, the current control threshold value in the medium-temperature region to be I2 and the current control threshold value in the high-temperature region to be I3 under the same frequency reduction mode, wherein I1 is more than I2 is more than I3.
Further optionally, said I2 ═ I1+ a; the I3 is I1+ b;
wherein a is the added value of the current in the middle temperature region, b is the added value of the current in the high temperature region, and a is less than or equal to b.
Further optionally, the air conditioner has different operation modes, and the plurality of outdoor ambient temperature reference ranges in the different operation modes are different;
before/during/after the detection of the outdoor environment temperature, the operation mode of the air conditioner is also detected, and the temperature zone range corresponding to the outdoor environment temperature is determined according to the operation mode of the air conditioner.
Further optionally, the operation modes include a cooling mode and a heating mode.
The invention also provides a variable frequency air conditioner, which comprises an outdoor unit, wherein a compressor is arranged in the outdoor unit; characterized in that, the air conditioner still includes:
the detection module is used for detecting the current operation mode of the air conditioner, the outdoor environment temperature and the current value of the compressor;
the control module receives the frequency reduction instruction, determines the reference range of the outdoor environment temperature in which the frequency reduction instruction is positioned according to the detected current outdoor environment temperature, and determines the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature; and when the detected compressor current is larger than the compressor current control threshold value in the frequency reduction mode, controlling the compressor to reduce the frequency until the compressor current reaches the current control threshold value in the frequency reduction mode, and stopping reducing the frequency to maintain the frequency of the compressor at the moment.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
under the condition of not increasing the cost of the whole machine, the invention realizes the effect of multi-gear power reduction under various working conditions such as high temperature, medium temperature, low temperature and the like by adopting the temperature division regions and synchronously adopting different modes for frequency reduction control, is convenient for a user or a power supply bureau to effectively adjust the power consumption according to the load of the current power grid, reduces the power consumption, ensures the air outlet temperature and the experience comfort level of the air conditioner, and can keep the quantitative requirement of the power consumption no matter how the environmental temperature changes.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: is the general control flow chart of the embodiment;
FIG. 2: is a specific work flow chart of the embodiment of the invention in the refrigeration mode;
FIG. 3: is a specific work flow diagram under the heating mode of the embodiment of the invention;
it should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a frequency reduction control method of a variable frequency air conditioner, wherein the air conditioner is provided with a plurality of frequency reduction modes and a plurality of outdoor environment temperature reference ranges, and the plurality of outdoor environment temperature reference ranges are not overlapped with each other; different frequency reduction modes correspond to different compressor current control thresholds at the same outdoor environment temperature; the same frequency reduction mode corresponds to different compressor current control thresholds under different outdoor environment temperature reference ranges; after the frequency reduction instruction is received, determining the reference range of the outdoor environment temperature of the frequency reduction instruction according to the detected current outdoor environment temperature, determining the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature, and correspondingly controlling the compressor according to the current control threshold.
After receiving the frequency reduction command, the control method of the embodiment combines the current control thresholds of different frequency reduction modes in different reference ranges of outdoor environment temperature according to the detected current value of the compressor and the environment temperature of the outdoor unit, so as to control the frequency of the compressor and reduce the power of the whole machine to achieve the set power consumption.
Further optionally, after receiving the instruction, detecting a current of the compressor, and when the detected current of the compressor is greater than a current control threshold of the compressor in the frequency-down mode, controlling the compressor to perform frequency-down until the current of the compressor reaches the current control threshold in the frequency-down mode, and stopping the frequency-down and maintaining the current frequency of the compressor.
The current control threshold values of the compressor under the same outdoor environment temperature reference range of different frequency reduction modes and the current threshold values of the same frequency reduction mode under the different outdoor environment temperature reference ranges in the embodiment are stored in the controller of the air conditioner. After receiving the frequency reduction command, determining a current reference threshold value of a frequency reduction mode in the frequency reduction command by detecting the external environment temperature, and after the detected current value is greater than the current reference threshold value, starting frequency reduction of the compressor until the current value of the compressor is less than or equal to the current reference threshold value, stopping the frequency reduction of the compressor at the moment, and maintaining the frequency for working.
The outdoor unit of the air conditioner is provided with a temperature sensor for detecting the outdoor environment temperature. The current value of the compressor can be detected by a current detection device, or a control board (hereinafter referred to as a DR board) is directly added beside a controller main board of the compressor, the DR board is electrically connected with the controller main board, and the working current of the DR board is provided by the controller main board. And the DR board can be used for receiving a frequency reduction command and controlling the compressor to reduce the frequency.
At the peak time of the power grid or the time required by a user, the user or a power supply bureau sends a frequency reduction instruction to an air conditioner external unit to reduce the power of the air conditioner to be below a certain power, so that a large amount of power is saved, the load of the power grid can be reduced while the user can continue to use the air conditioner, and the safety and the continuity of power supply are guaranteed.
The outdoor unit of the air conditioner is provided with a network port, when a user needs the outdoor unit of the air conditioner, the network port sends an instruction to the air conditioner through the network port, specifically, the network port is connected to a DR plate of the outdoor unit through a communication line in an inserting mode, a set of simple code dialing device is directly inserted into the network port, and the code dialing device can directly dial primary frequency reduction, secondary frequency reduction and tertiary frequency reduction. The user can control directly through the dialer, similar to a remote control. When necessary, the network port can be directly plugged in a network cable and is directly remotely controlled by a power supply office to control power consumption. After the DR board of the air conditioner outdoor unit receives the instruction, the air conditioner outdoor unit enters detection, and a power reduction mode is executed after corresponding conditions are met according to the outdoor environment temperature and the current of the controller main board.
Further optionally, the down-conversion modes include a primary down-conversion mode, a secondary down-conversion mode, and a tertiary down-conversion mode, wherein power consumption of the air conditioner in the primary down-conversion mode is less than power consumption of the air conditioner in the secondary down-conversion mode is less than power consumption of the air conditioner in the tertiary down-conversion mode. Preferably, when the frequency reduction mode in the frequency reduction command is a first-stage frequency reduction mode, the compressor is controlled to stop, at this time, only the fan operates, the air conditioner stops blowing cold air/hot air, and at this time, the air blown out by the indoor unit of the air conditioner is normal-temperature air. When the frequency reduction mode in the frequency reduction command is a two-stage frequency reduction mode and a three-stage frequency reduction mode, outdoor environment temperature and compressor current detection is carried out.
The embodiment adopts a first-stage frequency reduction mode, a second-stage frequency reduction mode and a third-stage frequency reduction mode reduce power consumption, the first-stage frequency reduction mode directly stops the compressor, the power and the power consumption of each level reduction of the second-stage frequency reduction mode and the third-stage frequency reduction mode are maintained below a certain percentage, a certain fall exists between two stages, the overlapping of functions is avoided, meanwhile, the output of no more than a certain amount of power consumption can be maintained under each environment working condition, energy conservation can be guaranteed, the comfort of a user can be guaranteed, the user can freely select proper consumption reduction functions, and the consumption of a power supply bureau in a peak period can be conveniently and freely controlled. The concrete expression is as follows:
1. the power consumption of the whole machine under three-stage frequency reduction (D3 mode) at various ambient temperatures is below 75%,
2. the power consumption of two-stage frequency reduction (D2 mode) is below 55% under various ambient temperatures.
3. The difference of the power consumption of the second-stage frequency reduction and the third-stage frequency reduction at various environmental temperatures reaches more than 15%, and the power consumption of the second-stage frequency reduction and the power consumption of the third-stage frequency reduction cannot cause the effect of mode functions to be overlapped.
Further optionally, the current control threshold in the secondary down-conversion mode is less than the current control threshold in the tertiary down-conversion mode.
As shown in the control flow chart of fig. 1, a user sends a frequency-down command, the DR panel determines a frequency-down mode after receiving the frequency-down command, directly controls the compressor to stop if receiving the D1 frequency-down mode, detects the outdoor environment temperature if receiving the D2 and D3 modes, determines the outdoor environment temperature reference range where the outdoor environment temperature is located, and determines the current reference threshold of the frequency-down mode according to the outdoor environment temperature reference range; and then detecting the current value of the compressor, controlling the compressor to reduce the frequency when judging that the detected current value is greater than the current control threshold value of the compressor in the frequency reduction mode, stopping reducing the frequency until the current of the compressor reaches the current control threshold value in the frequency reduction mode, and maintaining the frequency of the compressor at the time.
Further optionally, the plurality of outdoor ambient temperature reference ranges form a continuous temperature interval.
Further optionally, setting a plurality of outdoor environment temperature reference ranges as a low temperature zone, a medium temperature zone and a high temperature zone according to the temperature; and setting the current control threshold value in the low-temperature region to be I1, the current control threshold value in the medium-temperature region to be I2 and the current control threshold value in the high-temperature region to be I3 under the same frequency reduction mode, wherein I1 is more than I2 is more than I3. Preferably, I2 ═ I1+ a; i3 ═ I1+ b; wherein a is the added value of the current in the middle temperature region, b is the added value of the current in the high temperature region, and a is less than or equal to b.
Because the low temperature zone, the middle temperature zone and the high temperature zone have different environmental temperatures and different loads, the running frequency of the compressor is also different, the higher the environmental temperature is, the higher the load is, the required refrigeration/heating quantity requirement is large, the running frequency of the compressor is relatively high, the power of the whole machine is higher than the environmental temperature, and the current of the whole machine is higher than the environmental temperature, the control current of the middle temperature zone and the high temperature zone can be obtained by adding a certain current value on the basis of the low temperature zone serving as a reference during the manufacturing.
Further optionally, the air conditioner has different operation modes, and the plurality of outdoor ambient temperature reference ranges in the different operation modes are different; before/during/after the detection of the outdoor environment temperature, the operation mode of the air conditioner is also detected, and the temperature zone range corresponding to the outdoor environment temperature is determined according to the operation mode of the air conditioner. Preferred modes of operation include a cooling mode and a heating mode.
The following frequency reduction control methods under different outdoor environment temperature reference ranges of different operation mode machines are as follows:
as shown in the control flow chart of fig. 2, when the air conditioner operates in the cooling mode and the outside ambient temperature is low, i.e. T ≦ Tc1, the control method includes: analyzing the received frequency reduction instruction and the magnitude of a current value flowing through a main board of the controller; if a secondary frequency reduction instruction is received and I is more than Ic1, controlling the compressor to reduce the frequency until I is less than or equal to Ic1, and controlling the frequency of the compressor to stop reducing and maintain the operation of the frequency; if a three-stage frequency reduction instruction is received and I is more than Ic2, controlling the compressor to reduce the frequency until I is less than or equal to Ic2, and controlling the frequency of the compressor to stop reducing and maintaining the operation of the frequency; wherein Ic1 < Ic 2.
When the temperature is moderate at the outside environment temperature, namely Tc1 < T ≦ Tc2, the control method comprises the following steps: analyzing the received frequency reduction instruction and the magnitude of a current value flowing through a main board of the controller; if a secondary frequency reduction instruction is received and I is more than Ic1+ a1, controlling the compressor to reduce the frequency until I is less than or equal to Ic1+ a1, and controlling the frequency of the compressor to stop reducing and maintain the operation of the frequency; if a three-stage frequency reduction instruction is received and I is more than Ic2+ a1, the frequency of the compressor is controlled to be reduced until I is less than or equal to Ic2+ a1, and at the moment, the frequency of the compressor is controlled to stop reducing and the operation of the frequency is maintained.
When the outside environment temperature is high, namely T is more than Tc2, the control method comprises the following steps: analyzing the received frequency reduction instruction and the magnitude of a current value flowing through a main board of the controller; if a secondary frequency reduction instruction is received and I is more than Ic1+ b1, controlling the compressor to reduce the frequency until I is less than or equal to Ic1+ b1, and controlling the frequency of the compressor to stop reducing and maintain the operation of the frequency; if a three-stage down-conversion instruction is received, and I > Ic2+ b 1; and controlling the compressor to reduce the frequency until I is less than or equal to Ic2+ b1, and controlling the compressor frequency to stop reducing and maintain the frequency to operate, wherein a1 is the additional value of the current in the middle temperature region, b1 is the additional value of the current in the low temperature region, and a1 is less than or equal to b 1.
As shown in the control flowchart of fig. 3, when the air conditioner operates in the heating mode and the outside ambient temperature is high, i.e., T > Th1, the control method includes: analyzing the received frequency reduction instruction and the magnitude of a current value flowing through a main board of the controller; if a secondary frequency reduction instruction is received and I is more than Ih1, controlling the compressor to reduce the frequency until I is less than or equal to Ih1, and controlling the frequency of the compressor to stop reducing and maintaining the operation of the frequency; if a three-stage frequency reduction instruction is received, and I is more than Ih 2; and controlling the compressor to reduce the frequency until I is less than or equal to Ih2, and controlling the compressor to stop reducing the frequency and maintaining the operation of the frequency, wherein Ih1 is less than Ih 2.
When the temperature is moderate at the outside ambient temperature, namely Th1 < T ≦ Th2, the control method comprises the following steps: analyzing the received frequency reduction instruction and the magnitude of a current value flowing through a main board of the controller; if a secondary frequency reduction command is received and I is more than Ih1+ a2, controlling the compressor to reduce the frequency until I is less than or equal to Ih1+ a2, and controlling the frequency of the compressor to stop reducing and maintain the operation of the frequency; if a three-stage frequency reduction instruction is received, and I > Ih2+ a 2; and controlling the compressor to reduce the frequency until I is less than or equal to Ih2+ a2, and controlling the frequency of the compressor to stop reducing and maintaining the operation of the frequency.
When the outside environment temperature is low, namely T is more than Th2, the control method comprises the following steps: analyzing the received frequency reduction instruction and the magnitude of a current value flowing through a main board of the controller; if a secondary frequency reduction command is received and I is more than Ih1+ b2, controlling the compressor to reduce the frequency until I is less than or equal to Ih1+ b2, and controlling the frequency of the compressor to stop reducing and maintain the operation of the frequency; if a three-stage down-conversion instruction is received, and I > Ic2+ b 2; and controlling the compressor to reduce the frequency until I is less than or equal to Ic2+ b2, controlling the frequency of the compressor to stop reducing and maintaining the operation of the frequency, wherein c is less than or equal to b 2.
a2 is the added value of the current in the middle temperature area, b2 is the added value of the current in the low temperature area, a2 is not more than b2, in the heating mode, because the environment temperatures of the low temperature area, the middle temperature area and the high temperature area are different, the loads are different, the running frequency of the compressor is also different, the higher the environment temperature is, the smaller the load is, the less the required heating quantity is, the lower the environment temperature is, the required heating quantity is large, the running frequency of the compressor is relatively high, the power of the whole machine is also higher than the high temperature environment temperature, and the current of the whole machine is also higher than the high temperature environment temperature, so the control current of the middle temperature area and the low temperature area can be obtained by adding a certain current value on the basis when the high temperature.
The power consumption in the D2 mode and the D3 mode were compared.
The frequency reduction steps are as follows:
s1: receiving a down-conversion command, determining the down-conversion mode (D2 mode or D3 mode) of the down-conversion command
S2: detecting the outdoor environment temperature, determining the reference range of the outdoor environment temperature in which the outdoor environment temperature is positioned, and determining the current control threshold of the compressor in the frequency reduction mode in the frequency reduction command according to the reference range of the outdoor environment temperature;
s3: and detecting the current of the compressor, controlling the compressor to reduce the frequency when the detected current of the compressor is greater than the current control threshold value of the compressor in the frequency reduction mode, stopping reducing the frequency until the current of the compressor reaches the current control threshold value in the frequency reduction mode, and maintaining the frequency of the compressor at the time.
Table one and table two are comparisons of power consumption at different down conversion levels in different operation modes in the specific embodiment.
Table one: test data of power consumption of different frequency reduction levels in refrigeration mode
Table two: test data of power consumption of different frequency reduction levels in refrigeration mode
Through the test of different warm area operating modes under different modes, the result of contrast power consumption is as follows: the power consumption of the whole machine is below 75% under the three-level power reduction. The power consumption of the secondary power reducing function is below 55%. And the difference between the two-level power reduction setting and the three-level power reduction setting reaches more than 15 percent.
Example 2
The implementation also provides a variable frequency air conditioner adopting the variable frequency control method of the embodiment 1, which comprises an outdoor unit, wherein a compressor is arranged in the outdoor unit; the air conditioner further includes:
the detection module is used for detecting the current operation mode of the air conditioner, the outdoor environment temperature and the current value of the compressor;
the control module receives the frequency reduction instruction, determines the reference range of the outdoor environment temperature in which the frequency reduction instruction is positioned according to the detected current outdoor environment temperature, and determines the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature; and when the detected compressor current is larger than the compressor current control threshold value in the frequency reduction mode, controlling the compressor to reduce the frequency until the compressor current reaches the current control threshold value in the frequency reduction mode, and stopping reducing the frequency to maintain the frequency of the compressor at the moment.
The variable frequency air conditioner of this embodiment is under the condition that does not increase complete machine cost, through adopting the branch warm area, adopts different modes to control down the frequency in step, realizes all can reaching the effect of many grades of power reductions under the different outdoor ambient temperature, and convenience of customers or power supply office adjust power consumptively according to the load of current electric wire netting effectively, guarantees the air-out temperature and the experience sense comfort level of air conditioner when reducing power consumption, and no matter how ambient temperature changes, homoenergetic keeps the quantitative needs of power consumption.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A frequency-reducing control method of a variable-frequency air conditioner is characterized in that,
the air conditioner is provided with a plurality of frequency reduction modes and a plurality of outdoor environment temperature reference ranges, and the plurality of outdoor environment temperature reference ranges are not overlapped with each other; different frequency reduction modes correspond to different compressor current control thresholds at the same outdoor environment temperature; the same frequency reduction mode corresponds to different compressor current control thresholds under different outdoor environment temperature reference ranges;
after the frequency reduction instruction is received, determining the reference range of the outdoor environment temperature of the frequency reduction instruction according to the detected current outdoor environment temperature, determining the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature, and correspondingly controlling the compressor according to the current control threshold.
2. The frequency-down control method of claim 1, wherein after receiving the command, detecting a compressor current, and when the detected compressor current is greater than a compressor current control threshold in the frequency-down mode, controlling the compressor to perform frequency-down operation until the compressor current reaches the current control threshold in the frequency-down mode, and stopping the frequency-down operation to maintain the compressor at the current frequency.
3. The frequency reduction control method according to claim 2, wherein the frequency reduction modes include a primary frequency reduction mode, a secondary frequency reduction mode and a tertiary frequency reduction mode, wherein the power consumption of the air conditioner in the primary frequency reduction mode < the power consumption of the air conditioner in the secondary frequency reduction mode < the power consumption of the air conditioner in the tertiary frequency reduction mode.
4. The frequency down control method according to claim 3, wherein when the down-mode in the down-conversion command is the one-stage down-mode, the compressor is controlled to stop; when the frequency reduction mode in the frequency reduction command is a two-stage frequency reduction mode and a three-stage frequency reduction mode, outdoor environment temperature and compressor current detection is carried out.
5. The frequency reduction control method according to claim 4, wherein the current control threshold in the two-stage frequency reduction mode < the current control threshold in the three-stage frequency reduction mode.
6. The frequency down control method according to any of claims 1-5, wherein the plurality of outdoor ambient temperature reference ranges form a continuous temperature interval.
7. The frequency reduction control method according to claim 6, wherein the plurality of outdoor ambient temperature reference ranges are set as a low temperature zone, a medium temperature zone and a high temperature zone according to temperature;
and setting the current control threshold value in the low-temperature region to be I1, the current control threshold value in the medium-temperature region to be I2 and the current control threshold value in the high-temperature region to be I3 under the same frequency reduction mode, wherein I1 is more than I2 is more than I3.
8. The frequency reduction control method according to claim 7, wherein I2 ═ I1+ a; the I3 is I1+ b;
wherein a is the added value of the current in the middle temperature region, b is the added value of the current in the high temperature region, and a is less than or equal to b.
9. The frequency down control method according to claim 6, wherein the air conditioner has different operation modes, and the plurality of outdoor ambient temperature reference ranges in different operation modes are different;
before/during/after the detection of the outdoor environment temperature, the operation mode of the air conditioner is also detected, and the temperature zone range corresponding to the outdoor environment temperature is determined according to the operation mode of the air conditioner.
10. The frequency down control method according to claim 9, wherein the operation modes include a cooling mode and a heating mode.
11. An inverter air conditioner using the control method according to any one of claims 1 to 10, the air conditioner comprising an outdoor unit having a compressor therein; characterized in that, the air conditioner still includes:
the detection module is used for detecting the current operation mode of the air conditioner, the outdoor environment temperature and the current value of the compressor;
the control module receives the frequency reduction instruction, determines the reference range of the outdoor environment temperature in which the frequency reduction instruction is positioned according to the detected current outdoor environment temperature, and determines the current control threshold of the compressor in the frequency reduction mode in the frequency reduction instruction according to the reference range of the outdoor environment temperature; and when the detected compressor current is larger than the compressor current control threshold value in the frequency reduction mode, controlling the compressor to reduce the frequency until the compressor current reaches the current control threshold value in the frequency reduction mode, and stopping reducing the frequency to maintain the frequency of the compressor at the moment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992773A (en) * | 2021-03-02 | 2022-09-02 | 广东美的暖通设备有限公司 | Operation control method of air conditioner, air conditioner and computer readable storage medium |
| WO2023005218A1 (en) * | 2021-07-27 | 2023-02-02 | 青岛海尔空调器有限总公司 | Air conditioner control method and control apparatus, and air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101235546B1 (en) * | 2011-09-07 | 2013-02-21 | 엘지전자 주식회사 | An air conditioner and a control method the same |
| CN103968497A (en) * | 2013-01-30 | 2014-08-06 | 珠海格力电器股份有限公司 | Method and device for adjusting running frequency of air conditioning compressor as well as air conditioner |
| CN105910233A (en) * | 2016-04-29 | 2016-08-31 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN106121982A (en) * | 2016-06-27 | 2016-11-16 | 广东美的制冷设备有限公司 | The compressor control method of convertible frequency air-conditioner and device, convertible frequency air-conditioner |
| CN108626842A (en) * | 2018-04-23 | 2018-10-09 | 珠海格力电器股份有限公司 | A kind of reducing power consumption control method, device and equipment |
| CN111156748A (en) * | 2019-12-25 | 2020-05-15 | 珠海格力电器股份有限公司 | Variable frequency air conditioner limiting power control method, storage medium and air conditioner |
-
2020
- 2020-06-29 CN CN202010606469.5A patent/CN111780354A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101235546B1 (en) * | 2011-09-07 | 2013-02-21 | 엘지전자 주식회사 | An air conditioner and a control method the same |
| CN103968497A (en) * | 2013-01-30 | 2014-08-06 | 珠海格力电器股份有限公司 | Method and device for adjusting running frequency of air conditioning compressor as well as air conditioner |
| CN105910233A (en) * | 2016-04-29 | 2016-08-31 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN106121982A (en) * | 2016-06-27 | 2016-11-16 | 广东美的制冷设备有限公司 | The compressor control method of convertible frequency air-conditioner and device, convertible frequency air-conditioner |
| CN108626842A (en) * | 2018-04-23 | 2018-10-09 | 珠海格力电器股份有限公司 | A kind of reducing power consumption control method, device and equipment |
| CN111156748A (en) * | 2019-12-25 | 2020-05-15 | 珠海格力电器股份有限公司 | Variable frequency air conditioner limiting power control method, storage medium and air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992773A (en) * | 2021-03-02 | 2022-09-02 | 广东美的暖通设备有限公司 | Operation control method of air conditioner, air conditioner and computer readable storage medium |
| CN114992773B (en) * | 2021-03-02 | 2024-03-26 | 广东美的暖通设备有限公司 | Operation control method of air conditioner, air conditioner and computer readable storage medium |
| WO2023005218A1 (en) * | 2021-07-27 | 2023-02-02 | 青岛海尔空调器有限总公司 | Air conditioner control method and control apparatus, and air conditioner |
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