CN108361924B - Air conditioner frequency control method - Google Patents
Air conditioner frequency control method Download PDFInfo
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- CN108361924B CN108361924B CN201810008195.2A CN201810008195A CN108361924B CN 108361924 B CN108361924 B CN 108361924B CN 201810008195 A CN201810008195 A CN 201810008195A CN 108361924 B CN108361924 B CN 108361924B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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Abstract
The invention discloses a frequency control method of an air conditioner, which comprises the following steps: starting the air conditioner, and controlling the compressor to operate according to the initial frequency; in the running process of the air conditioner, the running time of the temperature sensor for actually reaching the temperature and stopping the air conditioner or the frequency of the temperature sensor for actually reaching the temperature and stopping the air conditioner is obtained and compared with the running time of the temperature reaching stopping machine or the frequency of the temperature reaching stopping machine; if the comparison result meets the set frequency reduction condition, controlling the compressor to operate in a frequency reduction mode on the basis of the current frequency; if the comparison result meets the set frequency increasing condition, controlling the compressor to operate in the frequency increasing mode on the basis of the current frequency; otherwise, controlling the compressor to keep the current frequency running. By applying the invention, the frequency control can be realized in a simple mode, and the requirement on the processing speed of the indoor unit is reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioning, particularly relates to control of an air conditioner, and more particularly relates to a frequency control method of the air conditioner.
Background
The inverter air conditioner is widely applied due to the advantages of high temperature control precision, energy conservation and the like. When the existing inverter air conditioner performs compressor frequency control, PID control based on temperature difference is generally adopted. Specifically, the indoor unit detects the indoor real-time temperature, calculates the temperature difference between the indoor real-time temperature and the target temperature, executes PID operation according to the temperature difference, acquires an indoor unit frequency control signal, sends the indoor unit frequency control signal to the outdoor unit, and controls the compressor frequency according to the signal by the outdoor unit to realize frequency modulation operation. The existing frequency control method has complex process and high requirement on the operation speed of an indoor unit, because PID operation is executed; the communication requirement between the indoor unit and the outdoor unit is high, and the indoor unit is required to transmit a frequency control signal to the outdoor unit, so that the indoor unit and the outdoor unit are required to be provided with special communication circuits, the structure is complex, and the cost is high.
Disclosure of Invention
The invention aims to provide a frequency control method of an air conditioner, which realizes frequency control in a simple mode and reduces the processing speed requirement on an indoor unit.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
a method of air conditioner frequency control, the method comprising:
starting the air conditioner, and controlling the compressor to operate according to the initial frequency;
in the running process of the air conditioner, the running time of the temperature sensor for actual temperature-reaching shutdown or the frequency of the temperature sensor for actual temperature-reaching shutdown is obtained, and the running time of the actual temperature-reaching shutdown is compared with the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is compared with the frequency of the set temperature-reaching shutdown;
if the comparison result meets the set frequency reduction condition, controlling the compressor to operate in a frequency reduction mode on the basis of the current frequency; if the comparison result meets the set frequency increasing condition, controlling the compressor to operate in the frequency increasing mode on the basis of the current frequency; otherwise, controlling the compressor to keep the current frequency running.
In the method described above, the initial frequency is a fixed frequency.
Preferably, the fixed frequency is a maximum operating frequency of the compressor.
Or, as the above method, the air conditioner is started up, and the compressor is controlled to operate according to the initial frequency, specifically including: the method comprises the steps of starting an air conditioner, obtaining an actual indoor environment temperature and an actual outdoor environment temperature when the air conditioner is started, calculating an actual temperature difference between the actual indoor environment temperature and the actual outdoor environment temperature, determining an actual initial frequency corresponding to the actual temperature difference according to a known corresponding relation between the temperature difference and an initial frequency and the actual temperature difference, and controlling the compressor to operate according to the actual initial frequency.
Or, as the above method, the air conditioner is started up, and the compressor is controlled to operate according to the initial frequency, specifically including:
if the air conditioner is powered on and started for the first time, selecting the fixed frequency as the initial frequency to control the operation of the compressor;
if the air conditioner is not powered on for the first time, acquiring the actual initial frequency corresponding to the running time of the temperature sensor reaching the temperature and stopping for the first time after the last powered on running, and controlling the compressor to run according to the actual initial frequency.
Preferably, the obtaining of the actual initial frequency corresponding to the operation time that the temperature sensor first reaches the temperature shutdown after the last power-on startup operation specifically includes: and acquiring the running time of the temperature sensor for the first time reaching the temperature and stopping the machine after the last power-on starting operation, and determining the initial frequency corresponding to the running time of the temperature sensor for the first time reaching the temperature and stopping the machine after the last power-on starting operation as the actual initial frequency according to the known corresponding relation between the running time of the first time reaching the temperature and the initial frequency.
As the method, the setting of the down-conversion condition comprises: the running time of the actual temperature-reaching shutdown is less than the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is greater than the frequency of the set temperature-reaching shutdown; the setting of the frequency-increasing condition comprises: the running time of the actual temperature-reaching shutdown is greater than the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is less than the frequency of the set temperature-reaching shutdown.
Preferably, in the method as described above, the set-up warm-up stop operation time is plural, and plural set-up warm-up stop operation times form plural set-up warm-up stop operation time ranges;
the obtaining of the actual running time of the temperature sensor reaching the temperature shutdown and the comparison with the set running time of the temperature sensor reaching the temperature shutdown specifically include: acquiring the actual temperature-reaching shutdown running time of the temperature sensor, comparing the actual temperature-reaching shutdown running time with the set temperature-reaching shutdown running time, and determining the running time range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown running time belongs;
the control compressor operates in a frequency reduction mode on the basis of the current frequency, and specifically comprises the following steps: according to the corresponding relation between the known frequency reducing frequency value and the set temperature-reaching shutdown running time range, obtaining an actual frequency reducing frequency value corresponding to the set temperature-reaching shutdown running time range to which the actual temperature-reaching shutdown running time belongs, and controlling the compressor to run after the actual frequency reducing frequency value is reduced on the basis of the current frequency;
the method for controlling the compressor to perform frequency-up operation on the basis of the current frequency specifically comprises the following steps: and obtaining an actual frequency-rising frequency value corresponding to the set temperature-reaching shutdown running time range to which the actual temperature-reaching shutdown running time belongs according to the corresponding relation between the known frequency-rising frequency value and the set temperature-reaching shutdown running time range, and controlling the compressor to run after the actual frequency-rising frequency value is increased on the basis of the current frequency.
Preferably, in the method as described above, the set temperature-reaching shutdown frequency is plural, and plural set temperature-reaching shutdown frequencies form plural set temperature-reaching shutdown frequency ranges;
the acquiring of the actual frequency of the temperature sensor reaching the temperature and stopping the temperature is compared with the setting of the frequency of the temperature reaching and stopping the temperature, and the method specifically comprises the following steps: acquiring the actual temperature-reaching shutdown frequency of the temperature sensor, comparing the actual temperature-reaching shutdown frequency with the set temperature-reaching shutdown frequency, and determining the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs;
the control compressor operates in a frequency reduction mode on the basis of the current frequency, and specifically comprises the following steps: according to the corresponding relation between the known frequency reduction frequency value and the frequency range of the set temperature-reaching shutdown, obtaining an actual frequency reduction frequency value corresponding to the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs, and controlling the compressor to operate after reducing the actual frequency reduction frequency value on the basis of the current frequency;
the method for controlling the compressor to perform frequency-up operation on the basis of the current frequency specifically comprises the following steps: and according to the corresponding relation between the known frequency increasing frequency value and the frequency range of the set temperature-reaching shutdown, obtaining the actual frequency increasing frequency value corresponding to the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs, and controlling the compressor to operate after increasing the actual frequency increasing frequency value on the basis of the current frequency.
According to the method, the controlling of the compressor to run in a frequency-reducing mode on the basis of the current frequency specifically comprises the following steps: the indoor unit sends a pulse signal corresponding to the frequency reduction operation to an outdoor unit, and the outdoor unit controls a compressor to perform the frequency reduction operation on the basis of the current frequency according to the pulse signal corresponding to the frequency reduction operation received from the indoor unit;
the controlling the compressor to perform frequency-up operation on the basis of the current frequency specifically comprises the following steps: the indoor unit sends a pulse signal corresponding to the frequency-increasing operation to the outdoor unit, and the outdoor unit controls the compressor to perform the frequency-increasing operation on the basis of the current frequency according to the pulse signal corresponding to the frequency-increasing operation received from the indoor unit.
Compared with the prior art, the invention has the advantages and positive effects that: according to the frequency control method of the air conditioner, when the air conditioner is started, the compressor is controlled to operate according to the initial frequency, in the operation process of the air conditioner, the up-down frequency operation of the compressor is controlled according to the operation time when the temperature sensor reaches the temperature and stops or the frequency when the temperature sensor reaches the temperature and stops, the operation time when the temperature reaches the temperature and the frequency when the temperature reaches the temperature and stops are easily obtained by the indoor unit without complex calculation processing, and therefore the frequency control method of the variable frequency air conditioner is simple to implement, has low requirement on the processing speed of the indoor unit, and further achieves frequency control of the variable frequency air conditioner in a simple and effective mode.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart of an embodiment of a frequency control method of an air conditioner according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a flow chart of an embodiment of a method for controlling a frequency of an air conditioner according to the present invention is shown. As shown in fig. 1, the method for implementing frequency control in this embodiment includes the following steps:
step 11: and starting the air conditioner, and controlling the compressor to operate according to the initial frequency.
After the air conditioner is started, the compressor is controlled to operate according to the initial frequency, specifically, after the outdoor unit is electrified, the outdoor unit controls the compressor to operate according to the initial frequency.
For the initial frequency, it can be determined in a number of ways.
As an embodiment, the initial frequency is a fixed frequency. That is, after each time the air conditioner is turned on, the outdoor unit controls the compressor to operate with the fixed frequency as the initial frequency. The fixed frequency is a known frequency value stored in the memory of the outdoor unit, and after the outdoor unit is powered on, the fixed frequency value is read from the memory, and the compressor is controlled to operate at the fixed frequency. As a preferred embodiment, the fixed frequency is the compressor maximum operating frequency. That is to say, after the air conditioner is started, the compressor is controlled to run at the maximum running frequency so as to realize the maximum refrigerating capacity or heating capacity of the system, the indoor temperature is regulated at the fastest speed, the aim of quickly regulating the temperature is fulfilled, and the indoor quick comfort regulation of the air conditioner at the initial running stage is improved. Moreover, the frequency of the compressor is directly controlled by taking the fixed frequency as the initial frequency each time, and the control mode is simple and convenient and is easy to realize.
As another embodiment, the initial frequency is not a fixed frequency, but a frequency value determined according to the indoor ambient temperature and the outdoor ambient temperature. Specifically, the air conditioner is started, and the operation of the compressor is controlled according to the initial frequency, including: the method comprises the steps of starting the air conditioner, obtaining an actual indoor environment temperature and an actual outdoor environment temperature when the air conditioner is started, calculating an actual temperature difference between the actual indoor environment temperature and the actual outdoor environment temperature, determining an actual initial frequency corresponding to the actual temperature difference according to a known corresponding relation between the temperature difference and the initial frequency and the actual temperature difference, and controlling the compressor to operate according to the actual initial frequency.
Wherein, the corresponding relation between the temperature difference and the initial frequency is stored in a memory of the air conditioner in advance. And the corresponding relation between the temperature difference and the initial frequency satisfies the following conditions: the larger the temperature difference, the higher the initial frequency. The purpose of determining the corresponding relation between the temperature difference and the initial frequency is to reduce the indoor and outdoor temperature difference at the highest speed and improve the comfort of indoor temperature regulation at the initial stage of starting and running of the air conditioner. After the air conditioner is started, acquiring the actual indoor environment temperature and the actual outdoor environment temperature when the air conditioner is started, and calculating the actual temperature difference between the actual indoor environment temperature and the actual outdoor environment temperature; searching or calculating the initial frequency corresponding to the actual temperature difference from the known corresponding relation between the temperature difference and the initial frequency to be used as the actual initial frequency; then, the outdoor unit controls the operation of the compressor according to the actual initial frequency
In some other embodiments, the air conditioner is started and the compressor is controlled to operate according to the initial frequency, and the following method can be adopted:
if the air conditioner is powered on for the first time, the fixed frequency is selected as the initial frequency to control the operation of the compressor. For example, the maximum operation frequency of the compressor is selected as the initial frequency, and after the air conditioner is powered on for the first time, the compressor is controlled to operate at the maximum operation frequency.
If the air conditioner is not powered on for the first time, acquiring the actual initial frequency corresponding to the running time of the temperature sensor reaching the temperature shutdown for the first time after the last powered on running, and controlling the compressor to run according to the actual initial frequency. That is, if the air conditioner is not powered on for the first time, the initial frequency of the compressor is determined according to the running time of the temperature sensor which is heated for the first time and is stopped after the last powered on running. Specifically, obtaining the actual initial frequency corresponding to the operation time that the temperature sensor first reaches the temperature shutdown after the last power-on startup operation includes: and acquiring the running time of the temperature sensor for the first temperature reaching shutdown after the last power-on startup running, and determining the initial frequency corresponding to the running time of the temperature sensor for the first temperature reaching shutdown after the last power-on startup running as the actual initial frequency according to the known corresponding relation between the running time of the first temperature reaching shutdown and the initial frequency. That is, the correspondence between the operating time at which the temperature sensor first reaches the temperature and stops and the initial frequency is stored in advance. And, the correspondence satisfies: the longer the run time for the first warm-up shutdown, the greater the corresponding initial frequency. The purpose of determining the correspondence between the operating time of the first warm-up shutdown and the initial frequency in this way is that the longer the operating time of the first warm-up shutdown, the longer the time for the indoor temperature to reach the target temperature, the slower the speed of the indoor temperature adjustment, and the too small initial frequency. In order to increase the speed of indoor temperature adjustment, the initial frequency of the compressor is increased after the next power-on start-up. Before the air conditioner is shut down each time, the running time of the temperature sensor for starting up the air conditioner to stop the air conditioner when reaching the temperature for the first time is stored. After the air conditioner is started next time, firstly reading the stored running time of the temperature sensor which reaches the temperature and stops for the first time after the last power-on running, and determining the actual initial frequency; the compressor is then controlled to operate at the actual initial frequency.
Step 12: in the running process of the air conditioner, the running time of the temperature sensor for actually reaching the temperature and stopping the air conditioner or the frequency of the temperature sensor for actually reaching the temperature and stopping the air conditioner is obtained and compared with the running time of the temperature reaching stopping machine or the frequency of the temperature reaching stopping machine.
After the air conditioner operates at the initial frequency in step 11, the air conditioner does not always operate at the initial frequency, but specifically controls the frequency of the compressor according to the actual operation time of the warm-up shutdown or the actual frequency of the warm-up shutdown after the operation time or the actual frequency of the warm-up shutdown of the temperature sensor can be acquired.
Moreover, if the operation time of the actual temperature-reaching shutdown is used as the control basis, the operation time of the previous actual temperature-reaching shutdown can be used as the control basis, and the average value of the operation times of the previous latest actual temperature-reaching shutdown can be used as the control basis. After the running time of the actual temperature-reaching shutdown is obtained, the running time of the actual temperature-reaching shutdown is compared with the running time of the set temperature-reaching shutdown, so that the frequency of the compressor is adjusted according to the comparison result. If the actual frequency of the temperature-reaching shutdown is used as the control basis, the temperature sensor is inevitably required to reach the temperature shutdown for many times, so that the frequency of the temperature-reaching shutdown can be obtained. After the frequency of the actual temperature-reaching shutdown is obtained, the frequency is compared with the frequency of the set temperature-reaching shutdown, so that the frequency of the compressor is adjusted according to the comparison result. The running time of the shutdown when the temperature is reached or the frequency of the shutdown when the temperature is reached are set, stored in advance and can be read and called conveniently.
Step 13: if the comparison result of the step 12 accords with the set frequency reduction condition, controlling the compressor to perform frequency reduction operation on the basis of the current frequency; if the comparison result of the step 12 accords with the set frequency increasing condition, controlling the compressor to operate in the frequency increasing mode on the basis of the current frequency; otherwise, if the set frequency reducing condition is not met, the set frequency increasing condition is not met, the compressor is controlled to keep running at the current frequency.
As an embodiment, the setting of the down-conversion condition includes: the running time of the actual temperature-reaching shutdown is less than the running time of the set temperature-reaching shutdown; or the frequency of the actual temperature-reaching shutdown is greater than the frequency of the set temperature-reaching shutdown. If the running time of the actual temperature-reaching shutdown is small or the frequency of the actual temperature-reaching shutdown is large, the operation under the current frequency is indicated, and the shutdown is easily caused by the temperature-reaching of the temperature sensor. In order to reduce energy consumption and avoid discomfort caused by frequent shutdown when the temperature sensor reaches the temperature, the compressor is controlled to run in a frequency reduction mode. And the setting of the frequency-increasing condition comprises: the running time of the actual temperature-reaching shutdown is greater than the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is less than the frequency of the set temperature-reaching shutdown. If the running time of the actual temperature-reaching shutdown is large or the frequency of the actual temperature-reaching shutdown is low, the operation under the current frequency is indicated, and the shutdown is difficult to achieve when the temperature sensor reaches the temperature. In this case, in order to increase the comfort of temperature regulation by rapidly reaching or approaching the indoor temperature to the target temperature, the compressor is controlled to operate at an increased frequency.
In other preferred embodiments, the magnitude of the down-conversion or up-conversion is also quantified and defined to improve the accuracy of the compressor frequency control. Specifically, if the operation time of the temperature-up shutdown is adopted as the control basis, the operation time of the temperature-up shutdown is set to be multiple, and the multiple operation times of the temperature-up shutdown form multiple operation time ranges of the temperature-up shutdown.
Then, obtaining the actual operation time of the temperature sensor reaching the temperature and stopping the machine, and comparing the operation time with the operation time of the temperature sensor reaching the temperature and stopping the machine, specifically comprising: and obtaining the actual operation time of the temperature sensor for reaching the temperature and stopping the machine, comparing the actual operation time with the set operation time for reaching the temperature and stopping the machine, and determining the operation time range of the set operation time for reaching the temperature and stopping the machine, which the actual operation time for reaching the temperature belongs to.
Then, controlling the compressor to run in a frequency-reducing mode on the basis of the current frequency, specifically comprising the following steps: and according to the corresponding relation between the known frequency reduction frequency value and the set temperature-reaching shutdown running time range, obtaining an actual frequency reduction frequency value corresponding to the set temperature-reaching shutdown running time range to which the actual temperature-reaching shutdown running time belongs, and controlling the compressor to run after reducing the actual frequency reduction frequency value on the basis of the current frequency. The corresponding relation between the frequency value of the frequency reduction and the operating time range set to reach the temperature shutdown is known and stored in advance.
And controlling the compressor to perform frequency-up operation on the basis of the current frequency, which specifically comprises the following steps: and according to the corresponding relation between the known frequency increasing frequency value and the set operation time range of the temperature-reaching shutdown, obtaining an actual frequency increasing frequency value corresponding to the set operation time range of the temperature-reaching shutdown to which the actual operation time of the temperature-reaching shutdown belongs, and controlling the compressor to operate after increasing the actual frequency increasing frequency value on the basis of the current frequency. The correspondence between the up-frequency value and the operating time range set to the temperature shutdown is also known and pre-stored.
Similarly, if the frequency of the temperature-reaching shutdown is used as the control basis, the frequency of the temperature-reaching shutdown is set to be multiple, and the multiple frequencies of the temperature-reaching shutdown form multiple frequency ranges of the temperature-reaching shutdown.
Then, obtaining the actual frequency of the temperature sensor reaching the temperature and stopping the machine, and comparing the obtained frequency with the set frequency of the temperature reaching machine, specifically comprising: and obtaining the actual frequency of the temperature sensor for stopping at the temperature, comparing the actual frequency with the set frequency for stopping at the temperature, and determining the frequency range of the set frequency for stopping at the temperature to which the actual frequency for stopping at the temperature belongs.
Then, controlling the compressor to run in a frequency-reducing mode on the basis of the current frequency, specifically comprising the following steps: and according to the corresponding relation between the known frequency reduction frequency value and the frequency range of the set temperature-reaching shutdown, obtaining the actual frequency reduction frequency value corresponding to the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs, and controlling the compressor to operate after the actual frequency reduction frequency value is reduced on the basis of the current frequency. The corresponding relation between the frequency value of the frequency demultiplication and the frequency range of the shutdown when the temperature is set is known and stored in advance.
And controlling the compressor to perform frequency-up operation on the basis of the current frequency, which specifically comprises the following steps: and according to the corresponding relation between the known frequency increasing frequency value and the frequency range of the set temperature-reaching shutdown, obtaining the actual frequency increasing frequency value corresponding to the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs, and controlling the compressor to operate after increasing the actual frequency increasing frequency value on the basis of the current frequency. The corresponding relation between the frequency raising frequency value and the frequency range for setting the temperature-reaching shutdown is also known and stored in advance.
In order to simplify the communication between the indoor unit and the outdoor unit, in some other preferred embodiments, the controlling the compressor to perform the down-conversion operation based on the current frequency specifically includes: the indoor unit sends a pulse signal corresponding to the frequency reduction operation to the outdoor unit, and the outdoor unit controls the compressor to operate in a frequency reduction mode on the basis of the current frequency according to the pulse signal corresponding to the frequency reduction operation received from the indoor unit.
And controlling the compressor to perform frequency-up operation on the basis of the current frequency, which specifically comprises the following steps: the indoor unit sends a pulse signal corresponding to the frequency-increasing operation to the outdoor unit, and the outdoor unit controls the compressor to perform the frequency-increasing operation on the basis of the current frequency according to the pulse signal corresponding to the frequency-increasing operation received from the indoor unit.
By adopting the method, the indoor unit can realize the adjustment and control of the running frequency of the compressor only by sending a pulse signal to the outdoor unit. The indoor unit sends the pulse signal to the outdoor unit, an additional communication circuit is not needed to be arranged between the indoor unit and the outdoor unit, and the pulse signal can be transmitted on the power supply line by utilizing the power supply line between the indoor unit and the outdoor unit and matching with certain simplified power supply control, so that the whole structure of the air conditioner is simplified, and the whole cost is reduced.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. An air conditioner frequency control method, characterized in that the method comprises:
starting the air conditioner, and controlling the compressor to operate according to the initial frequency;
in the running process of the air conditioner, the running time of the temperature sensor for actual temperature-reaching shutdown or the frequency of the temperature sensor for actual temperature-reaching shutdown is obtained, and the running time of the actual temperature-reaching shutdown is compared with the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is compared with the frequency of the set temperature-reaching shutdown;
if the comparison result meets the set frequency reduction condition, controlling the compressor to operate in a frequency reduction mode on the basis of the current frequency; if the comparison result meets the set frequency increasing condition, controlling the compressor to operate in the frequency increasing mode on the basis of the current frequency; otherwise, controlling the compressor to keep the current frequency running.
2. The method of claim 1, wherein the initial frequency is a fixed frequency.
3. The method of claim 2, wherein the fixed frequency is a compressor maximum operating frequency.
4. The method according to claim 1, wherein the air conditioner is powered on and the operation of the compressor is controlled according to an initial frequency, specifically comprising: the method comprises the steps of starting an air conditioner, obtaining an actual indoor environment temperature and an actual outdoor environment temperature when the air conditioner is started, calculating an actual temperature difference between the actual indoor environment temperature and the actual outdoor environment temperature, determining an actual initial frequency corresponding to the actual temperature difference according to a known corresponding relation between the temperature difference and an initial frequency and the actual temperature difference, and controlling the compressor to operate according to the actual initial frequency.
5. The method according to claim 1, wherein the air conditioner is powered on and the operation of the compressor is controlled according to an initial frequency, specifically comprising:
if the air conditioner is powered on and started for the first time, selecting the fixed frequency as the initial frequency to control the operation of the compressor;
if the air conditioner is not powered on for the first time, acquiring the actual initial frequency corresponding to the running time of the temperature sensor reaching the temperature and stopping for the first time after the last powered on running, and controlling the compressor to run according to the actual initial frequency.
6. The method according to claim 5, wherein the obtaining of the actual initial frequency corresponding to the operation time of the temperature sensor reaching the temperature and stopping for the first time after the last power-on startup operation specifically comprises: and acquiring the running time of the temperature sensor for the first time reaching the temperature and stopping the machine after the last power-on starting operation, and determining the initial frequency corresponding to the running time of the temperature sensor for the first time reaching the temperature and stopping the machine after the last power-on starting operation as the actual initial frequency according to the known corresponding relation between the running time of the first time reaching the temperature and the initial frequency.
7. The method of any of claims 1 to 6, wherein the setting of the down-conversion condition comprises: the running time of the actual temperature-reaching shutdown is less than the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is greater than the frequency of the set temperature-reaching shutdown; the setting of the frequency-increasing condition comprises: the running time of the actual temperature-reaching shutdown is greater than the running time of the set temperature-reaching shutdown, or the frequency of the actual temperature-reaching shutdown is less than the frequency of the set temperature-reaching shutdown.
8. The method of any one of claims 1 to 6, wherein the set-up run-time-up shutdown is plural, a plurality of the set-up run-times-up shutdown forming a plurality of set-up run-time ranges-up to the warm-up shutdown;
the obtaining of the actual running time of the temperature sensor reaching the temperature shutdown and the comparison with the set running time of the temperature sensor reaching the temperature shutdown specifically include: acquiring the actual temperature-reaching shutdown running time of the temperature sensor, comparing the actual temperature-reaching shutdown running time with the set temperature-reaching shutdown running time, and determining the running time range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown running time belongs;
the control compressor operates in a frequency reduction mode on the basis of the current frequency, and specifically comprises the following steps: according to the corresponding relation between the known frequency reducing frequency value and the set temperature-reaching shutdown running time range, obtaining an actual frequency reducing frequency value corresponding to the set temperature-reaching shutdown running time range to which the actual temperature-reaching shutdown running time belongs, and controlling the compressor to run after the actual frequency reducing frequency value is reduced on the basis of the current frequency;
the method for controlling the compressor to perform frequency-up operation on the basis of the current frequency specifically comprises the following steps: and obtaining an actual frequency-rising frequency value corresponding to the set temperature-reaching shutdown running time range to which the actual temperature-reaching shutdown running time belongs according to the corresponding relation between the known frequency-rising frequency value and the set temperature-reaching shutdown running time range, and controlling the compressor to run after the actual frequency-rising frequency value is increased on the basis of the current frequency.
9. The method of any one of claims 1 to 6, wherein the frequency of set-up ramp-down is plural, the plural frequency of set-up ramp-down forming a plurality of frequency ranges of set-up ramp-down;
the acquiring of the actual frequency of the temperature sensor reaching the temperature and stopping the temperature is compared with the setting of the frequency of the temperature reaching and stopping the temperature, and the method specifically comprises the following steps: acquiring the actual temperature-reaching shutdown frequency of the temperature sensor, comparing the actual temperature-reaching shutdown frequency with the set temperature-reaching shutdown frequency, and determining the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs;
the control compressor operates in a frequency reduction mode on the basis of the current frequency, and specifically comprises the following steps: according to the corresponding relation between the known frequency reduction frequency value and the frequency range of the set temperature-reaching shutdown, obtaining an actual frequency reduction frequency value corresponding to the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs, and controlling the compressor to operate after reducing the actual frequency reduction frequency value on the basis of the current frequency;
the method for controlling the compressor to perform frequency-up operation on the basis of the current frequency specifically comprises the following steps: and according to the corresponding relation between the known frequency increasing frequency value and the frequency range of the set temperature-reaching shutdown, obtaining the actual frequency increasing frequency value corresponding to the frequency range of the set temperature-reaching shutdown to which the actual temperature-reaching shutdown frequency belongs, and controlling the compressor to operate after increasing the actual frequency increasing frequency value on the basis of the current frequency.
10. The method according to any one of claims 1 to 6, wherein controlling the compressor to run down on the basis of the current frequency comprises: the indoor unit sends a pulse signal corresponding to the frequency reduction operation to an outdoor unit, and the outdoor unit controls a compressor to perform the frequency reduction operation on the basis of the current frequency according to the pulse signal corresponding to the frequency reduction operation received from the indoor unit;
the controlling the compressor to perform frequency-up operation on the basis of the current frequency specifically comprises the following steps: the indoor unit sends a pulse signal corresponding to the frequency-increasing operation to the outdoor unit, and the outdoor unit controls the compressor to perform the frequency-increasing operation on the basis of the current frequency according to the pulse signal corresponding to the frequency-increasing operation received from the indoor unit.
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| CN109539512B (en) * | 2018-11-26 | 2021-01-26 | 奥克斯空调股份有限公司 | Air conditioner frequency reduction control method and device and air conditioner |
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| CN109751739B (en) * | 2018-12-12 | 2021-04-20 | 广东美的暖通设备有限公司 | Control method and device for multi-split air conditioner, outdoor unit and multi-split air conditioner |
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| CN113719965B (en) * | 2021-08-16 | 2022-09-27 | 宁波奥克斯电气股份有限公司 | Frequency control method and device of compressor and variable frequency air conditioner |
| CN113944980A (en) * | 2021-11-19 | 2022-01-18 | 宁波奥克斯电气股份有限公司 | Air conditioner and operation method thereof |
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