CN112212480B - Control method of air conditioning equipment and air conditioning equipment - Google Patents
Control method of air conditioning equipment and air conditioning equipment Download PDFInfo
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- CN112212480B CN112212480B CN201910615275.9A CN201910615275A CN112212480B CN 112212480 B CN112212480 B CN 112212480B CN 201910615275 A CN201910615275 A CN 201910615275A CN 112212480 B CN112212480 B CN 112212480B
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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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A control method of an air conditioning apparatus is applied to a heating mode; the method comprises the following steps: when the air conditioner is started, the compressor is controlled to be increased to the natural frequency to operate, the outdoor fan works at the highest set rotating speed, and the electronic expansion valve is opened to the target opening degree; judging an outdoor environment temperature interval where the real-time outdoor environment temperature is located, and controlling the compressor to increase the frequency to a correction oil return frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval; judging whether the timing of the first timer reaches the effective timing duration or not; and when the timing of the first timer reaches the effective timing duration, controlling the compressor to increase the frequency to a target frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval. An air conditioning apparatus is also disclosed. The invention can achieve the purpose of quickly achieving the ideal heating effect under various conditions and has the advantage of good comfort.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a control method of air conditioning equipment and the air conditioning equipment adopting the control method.
Background
A heat pump apparatus, such as a heat pump air conditioner, is a device that transfers heat energy from a low-level heat source to a high-level heat source. The device can convert low-grade heat energy in natural air into high-grade heat energy which can be utilized through mechanical work. The main components of the heat pump air conditioner comprise a compressor, a condenser, a throttle valve and an evaporator. When the air conditioner is warmed in winter, the four-way valve is in a heat pump working position, high-pressure refrigerant vapor discharged by the compressor enters the indoor heat exchanger, and the indoor heat exchanger works in a condensation state. The refrigerant vapor is condensed to release latent heat to heat the indoor air, so as to achieve the purpose of indoor heating. The condensed state refrigerant flows through the throttling device and enters the outdoor heat exchanger. The outdoor heat exchanger operates in an evaporative state. The refrigerant absorbs external heat to evaporate, and the evaporated vapor enters the compressor through the air suction port of the compressor to complete the heating cycle.
In the conventional heat pump air conditioner, after the air conditioner is started, the compressor is firstly raised to the first oil return platform to operate for a period of time and then is adjusted to the second oil return platform to operate, so that the situation that the compressor cannot work due to the fact that excessive compressor lubricating oil is taken away by a refrigerant is avoided, and each oil return platform corresponds to a set oil return frequency. This process prolongs the time to eliminate the indoor temperature deviation. In order to avoid that the user experience is influenced by sending the air supply with the too low temperature into the air conditioning room, the guide plate of the indoor unit is usually set to work at a cold air prevention position in the prior art, and the guide plate returns to a normal air supply position when the temperature of the indoor coil pipe is increased to the set temperature. The whole process takes 2-5 minutes, the waiting time is long, and the user experience is poor.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.
Disclosure of Invention
The invention provides a control method of air conditioning equipment, aiming at the problems of long waiting time for starting a heat pump air conditioner and poor user experience in the prior art.
A control method of an air conditioning apparatus is applied to a heating mode; the method comprises the following steps:
when the air conditioner is started, the compressor is controlled to be increased to the natural frequency to operate, the outdoor fan works at the highest set rotating speed, and the electronic expansion valve is opened to the target opening degree;
judging an outdoor environment temperature interval where the real-time outdoor environment temperature is located, and controlling the compressor to increase the frequency to a correction oil return frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval;
judging whether the timing of the first timer reaches the effective timing duration or not;
and when the timing of the first timer reaches the effective timing duration, controlling the compressor to increase the frequency to a target frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval.
Further, the following steps are executed when an outdoor environment temperature interval where the real-time outdoor environment temperature is located is judged, and the compressor is controlled to be increased to the correction oil return frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval:
determining whether the real-time outdoor environment temperature is less than or equal to a first outdoor environment temperature threshold; if the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold value, the real-time outdoor environment temperature is in a first outdoor environment temperature interval, and the compressor is controlled to be increased to the first correction oil return frequency; or
Determining whether the real-time outdoor ambient temperature is greater than a first outdoor ambient temperature threshold; if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, the real-time outdoor environment temperature is in a second outdoor environment temperature interval, and the compressor is controlled to be increased to the second correction oil return frequency;
wherein the first corrected oil return frequency is greater than the second corrected oil return frequency.
Further, when the timing of the first timer reaches the effective timing duration, the following steps are executed when the compressor is controlled to increase the frequency to the target frequency corresponding to the outdoor environment temperature interval according to the determined outdoor environment temperature interval:
if the real-time outdoor environment temperature is in a first outdoor environment temperature interval, controlling the compressor to increase the frequency from the first correction oil return frequency to the maximum heating set frequency;
if the real-time outdoor environment temperature is in the second outdoor environment temperature interval, judging whether the real-time outdoor environment temperature is smaller than or equal to a second outdoor environment temperature threshold value; if the real-time outdoor environment temperature is less than or equal to a second outdoor environment temperature threshold value, controlling the compressor to increase the frequency from the second correction oil return frequency to a set maximum frequency limit frequency corresponding to the real-time outdoor environment temperature; if the real-time outdoor environment temperature is greater than the second outdoor environment temperature threshold, judging whether the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold, and if the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold, controlling the compressor to increase the frequency from the second correction oil return frequency to a set target frequency;
wherein the second outdoor ambient temperature threshold is greater than the first outdoor ambient temperature threshold.
Further, before determining the outdoor environment temperature interval where the real-time outdoor environment temperature is located, the method further includes the following steps:
judging whether the real-time outdoor environment temperature is greater than the oil return protection outdoor environment temperature threshold value or not and whether the real-time indoor environment temperature is greater than the oil return protection indoor environment temperature threshold value or not;
and if the real-time outdoor environment temperature is greater than the oil return protection outdoor environment temperature threshold value and the real-time indoor environment temperature is greater than the oil return protection indoor environment temperature threshold value, controlling the compressor to increase the frequency from the natural frequency to the set maximum frequency limit frequency corresponding to the real-time outdoor environment temperature.
Further, whether the temperature of the coil of the indoor heat exchanger is smaller than or equal to a first intervention threshold temperature or not is judged, and if the temperature of the coil of the indoor heat exchanger is smaller than or equal to the first intervention threshold temperature, the indoor fan is controlled to be in a shutdown state; and if the temperature of the indoor coil pipe is greater than the first intervention threshold temperature, controlling the indoor fan to operate according to the lowest wind speed.
And further, judging whether the temperature of the coil of the indoor heat exchanger is greater than or equal to a second intervention threshold temperature, and controlling the indoor fan to operate according to the set wind speed if the temperature of the coil of the indoor heat exchanger is greater than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration.
Further, when the temperature of the coil pipe of the indoor heat exchanger is larger than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration, the air supply outlet guide plate is controlled to recover to the set position from the cold air prevention position.
Further, when the indoor fan runs, the electric heating device is controlled to be started until the electric heating closing condition is met, and the electric heating device is controlled to be closed.
Further, the compressor runs according to the target frequency, and the running period timer starts to time;
and when the timing duration of the running period timer reaches the effective timing duration, controlling the running of the compressor according to a PID algorithm.
According to the control method of the air conditioning equipment, disclosed by the invention, the oil return frequency is corrected according to the current indoor environment temperature expectation formed based on the real-time outdoor environment temperature, the oil return requirement of the compressor and the basic heating requirement of the air conditioner are considered, a more reasonable corrected oil return frequency is obtained through correction and compensation in the starting-up stage, the compressor is further enabled to work according to the target frequency corresponding to different outdoor environment temperature intervals, and the purpose of quickly achieving the ideal heating effect can be realized under various conditions.
Also disclosed is an air conditioning apparatus, which employs a control method comprising the steps of:
when the air conditioner is started, the compressor is controlled to be increased to the natural frequency to operate, the outdoor fan works at the highest set rotating speed, and the electronic expansion valve is opened to the target opening degree;
judging an outdoor environment temperature interval where the real-time outdoor environment temperature is located, and controlling the compressor to increase the frequency to a correction oil return frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval;
judging whether the timing of the first timer reaches the effective timing duration or not;
and when the timing of the first timer reaches the effective timing duration, controlling the compressor to increase the frequency to a target frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval.
The air conditioning equipment disclosed by the invention has the advantage of high conditioning comfort.
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
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of one embodiment of a method for controlling an air conditioning unit according to the present disclosure;
FIG. 2 is a flowchart of one embodiment of controlling the compressor to ramp up to a calibrated oil return frequency corresponding to an outdoor ambient temperature interval of FIG. 1;
FIG. 3 is a flowchart of one embodiment of FIG. 1 illustrating controlling the compressor to ramp up to a target frequency corresponding to an outdoor ambient temperature interval;
fig. 4 is a flowchart illustrating another embodiment of controlling the compressor to ramp up to a target frequency corresponding to an outdoor ambient temperature interval in fig. 1.
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.
The terms "first," "second," "third," and the like in the description and in the claims, and in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. One skilled in the art will appreciate that the embodiments described herein can be combined with other embodiments.
Fig. 1 is a flowchart showing an embodiment of a control method of an air conditioning apparatus. The air conditioning equipment is specifically an air conditioner, especially an inverter air conditioner, and can timely meet the requirement of indoor cold and heat by controlling the refrigerant circulation quantity of a compressor and the refrigerant flow entering an indoor heat exchanger. The compressor is driven by a variable frequency motor, and the rotating speed of the motor can be continuously changed according to the requirement of indoor refrigerating capacity, namely the frequency of the compressor is adjusted. The refrigerant flow into the indoor heat exchanger is also regulated by the electronic expansion valve. The electronic expansion valve rapidly adjusts the opening degree according to various preset adjusting target actions according to the instruction of the air conditioner controller, and rapidly controls the flow of the refrigerant.
The control method provided by the embodiment comprises the following steps:
when the air conditioner is started, the compressor is controlled to be increased to the natural frequency to operate, the outdoor fan works at the highest set rotating speed, and the electronic expansion valve is opened to the target opening degree.
Specifically, when the air conditioner is powered on and started, the compressor is controlled to start firstly, and the running frequency of the compressor is driven to be increased to the natural frequency to run according to a preset open-loop control algorithm. The natural frequency is a preset optimal value, and when the compressor works at the natural frequency, the oil return rate of the compressor meets basic expectation and does not cause a shutdown phenomenon. The natural frequency may be set to 50Hz and the open loop control algorithm may be set to control the compressor operating frequency to ramp up to 50Hz in 4 seconds. And simultaneously, the outdoor fan is set to work at the highest set rotating speed, and the electronic expansion valve is opened to the target opening degree. Under the condition, after the air conditioner is started, the air conditioner can rapidly work in a relatively stable state, and the refrigerant in the air conditioning system maintains a certain flow and speed, so that the lubricating oil of the compressor can be ensured to have a certain oil return flow rate.
With the control mode difference that keeps in first oil return platform until reaching the preset time among the prior art, in this embodiment, further cooperate indoor outer environment control compressor frequency, when considering compressor oil return demand, reduce the deviation between indoor ambient temperature and the target temperature as early as possible at the start-up stage. To achieve the purpose, an outdoor environment temperature interval where the real-time outdoor environment temperature is located is further judged, and the compressor is controlled to be increased to the correction oil return frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval.
The real-time outdoor environment temperature can be obtained by sampling through a temperature sensor arranged on the outdoor heat exchanger, and can also be obtained from an external terminal in a wireless communication mode.
As shown in fig. 2, the step of determining the outdoor environment temperature interval where the real-time outdoor environment temperature is located specifically includes the following steps:
first, whether the real-time outdoor environment temperature is less than or equal to a first outdoor environment temperature threshold value is judged. The first outdoor ambient temperature threshold corresponds to a case where the outdoor ambient temperature is low. When the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold, it can be expected that the deviation between the indoor environment temperature and the target indoor temperature is large, and according to the conventional control method, the indoor environment can reach the comfort level corresponding to the target indoor temperature in a long time. The first outdoor ambient temperature threshold may preferably be set to 5 degrees celsius. And if the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold value, the real-time outdoor environment temperature is in a first outdoor environment temperature interval. The requirement of the oil return of the compressor and the heating comfort in the starting-up stage are both considered, the frequency of the compressor is quickly controlled to be increased to a first high correction oil return frequency, and the refrigerant has a high flow speed under the condition of low temperature. The compressor may perform a regulating function such that the temperature difference between the room temperature and the target temperature is reduced. The first corrected oil return frequency is greater than the natural frequency, preferably the first corrected oil return frequency is set to 70Hz, and the rate of frequency up-conversion from the natural frequency to the first corrected oil return frequency may be set to 2 Hz/s. Thus, when the outdoor temperature is low, the compressor can be operated at a relatively high frequency for about 15 seconds after the start-up.
If the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold, the outdoor environment temperature is relatively moderate, and it can be expected that although the indoor environment temperature has a certain deviation from the target indoor temperature, the time for reaching the comfort level is relatively controllable. Therefore, when the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, the real-time outdoor environment temperature is judged to be in the second outdoor environment temperature interval, the oil return and comfort requirements of the compressor are considered, the frequency of the compressor is quickly controlled to be increased to the second correction oil return frequency, and the refrigerant has relatively moderate flow rate in a relatively moderate temperature state. The second corrected oil return frequency is less than the first corrected oil return frequency and greater than the natural frequency, the second corrected oil return frequency is preferably set to 58Hz, and the rate of frequency up-conversion from the natural frequency to the second corrected oil return frequency may be set to 2 Hz/s. Thus, when the outdoor temperature is relatively mild, the compressor can operate at a reasonable frequency for about 8 seconds after starting.
And controlling the compressor to raise the frequency to the corrected oil return frequency corresponding to the outdoor environment temperature interval. And controlling the first timer to start timing, and judging whether the timing of the first timer reaches the effective timing duration.
If the timing of the first timer reaches the effective timing duration, the oil return reaches the preset set time. The control target at this time is only to eliminate the temperature difference between the real-time indoor temperature and the target indoor temperature. Therefore, further, when the timing of the first timer reaches the effective timing length, the compressor is controlled to be raised to the target frequency corresponding to the outdoor ambient temperature section according to the determined outdoor ambient temperature section. The effective count time period of the first timer may be set to 45 s.
As shown in fig. 3 and 4, it is a preferable way to control the compressor to be upscaled to the target frequency corresponding to the outdoor ambient temperature section according to the determined outdoor ambient temperature section.
Specifically, if the real-time outdoor environment temperature is in the first outdoor environment temperature interval, as described above, the real-time outdoor environment temperature is relatively low, and therefore the compressor is controlled to directly increase the frequency from the first corrected oil return frequency to the maximum heating setting frequency, that is, the target frequency corresponding to the first outdoor environment temperature interval, so as to fully exert the adjusting capability of the compressor, and enable the room temperature to reach the setting temperature in the shortest time. The heating setting maximum frequency is set according to the capacity of the compressor, and is a preset fixed value, which is about 100 Hz.
And if the real-time outdoor environment temperature is in the second outdoor environment temperature interval, further judging whether the real-time outdoor environment temperature is less than or equal to a second outdoor environment temperature threshold value. The second outdoor environment temperature threshold is greater than the first outdoor environment temperature threshold, and corresponds to a case where the outdoor environment temperature is high, preferably to a minimum value corresponding to the recommended target indoor temperature in the heating mode, and in this embodiment, is set to 18 degrees celsius. If the real-time outdoor environment temperature is less than or equal to the second outdoor environment temperature threshold, it indicates that a certain deviation still exists between the real-time indoor temperature and the target indoor temperature in the current outdoor environment, so the compressor is controlled to be increased from the second correction oil return frequency to the set maximum limit frequency corresponding to the real-time outdoor environment temperature, namely a target frequency corresponding to the second outdoor environment temperature interval, so that the indoor temperature reaches the target indoor temperature as soon as possible. The set maximum frequency limit frequency corresponding to the real-time outdoor environment temperature can be obtained through a pre-stored data table, the one-to-one corresponding relation between the outdoor environment temperature and the set maximum frequency limit frequency is restricted in the data table, and the set maximum frequency limit frequency is obtained through a large number of experiments by technicians according to the air conditioner capacity, the compressor model and different environment conditions. The lower the outdoor ambient temperature, the higher the maximum frequency limit frequency is set.
If the real-time outdoor environment temperature is greater than the second outdoor environment temperature threshold, the current environment temperature is higher, and whether the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold is further judged. The indoor ambient temperature threshold corresponds to a median of the recommended target indoor temperature, and is set to 20 degrees celsius in this embodiment. And if the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold value, controlling the compressor to increase the frequency from the second correction oil return frequency to the set target frequency. The target frequency is preferably set to 80Hz so that the air conditioner can eliminate small temperature deviation in a short time to achieve a desired control effect while avoiding additional energy consumption.
In the control method disclosed in the above embodiment, the oil return frequency is corrected according to the current indoor environment temperature expectation formed based on the real-time outdoor environment temperature, the oil return requirement of the compressor and the basic heating requirement of the air conditioner are both considered, a more reasonable corrected oil return frequency is obtained through correction and compensation in the startup stage, the compressor is further enabled to work according to the target frequency corresponding to different outdoor environment temperature intervals, and the purpose of quickly achieving an ideal heating effect can be achieved under various conditions.
If the indoor and outdoor temperatures are high, the lubricating oil of the compressor is usually kept in a more ideal flowing state. If comfort is the highest priority control objective, then in such a situation, it may be preferable to have the compressor not up-clocked to the oil return platform, so as not to sacrifice heating capacity while up-clocking to the oil return platform and maintaining hold. Therefore, as a preferred embodiment, before determining the outdoor environment temperature interval where the real-time environment temperature is located, the method further includes the following steps:
and judging whether the real-time outdoor environment temperature is greater than the oil return protection outdoor environment temperature threshold or not and whether the real-time indoor environment temperature is greater than the oil return protection indoor environment temperature threshold or not. And if the real-time outdoor environment temperature is greater than the oil return protection outdoor environment temperature threshold value and the real-time indoor environment temperature is greater than the oil return protection indoor environment temperature threshold value, indicating that the indoor and outdoor temperatures are high, controlling the compressor to directly increase the frequency from the inherent frequency to the set maximum limit frequency corresponding to the real-time outdoor environment temperature, taking the maximum limit frequency as the target frequency, and not increasing the frequency to the oil return platform. Similarly, the set maximum frequency limit frequency corresponding to the real-time outdoor environment temperature can be obtained through a pre-stored data table, the one-to-one correspondence relationship between the outdoor environment temperature and the set maximum frequency limit frequency is restricted in the data table, and the set maximum frequency limit frequency is obtained through a large number of experiments by technicians according to the air conditioner capacity, the compressor model and different environment conditions. Preferably, the oil return protection outdoor environment temperature threshold may be set to 18 degrees celsius, and the oil return protection indoor environment temperature threshold may be set to 20 degrees celsius.
And after the compressor operates according to the target frequency, the operation period timer starts to time. And when the timing duration of the running period timer reaches the effective timing duration, controlling the running of the compressor according to a PID algorithm. The timer period of the operation cycle timer is preferably 30 minutes.
On the user side, the control method also provides protection against direct blowing of cold air. Specifically, when the air conditioner is started, the air deflector of the air supply outlet of the air conditioner is controlled to rotate to the cold air prevention position, namely, the air is supplied upwards, and cold air is prevented from directly blowing to a user. Continuously judging whether the temperature of the coil of the indoor heat exchanger is less than or equal to a first intervention threshold temperature or not in the running process of the air conditioner, and controlling the indoor fan to be in a shutdown state if the temperature of the coil of the indoor heat exchanger is less than or equal to the first intervention threshold temperature; and if the temperature of the indoor coil pipe is greater than the first intervention threshold temperature, controlling the indoor fan to operate according to the lowest wind speed. Preferably, the first intervention threshold temperature is 25 degrees celsius. And in the process of cold air direct blowing prevention protection control, further continuously judging whether the temperature of the indoor heat exchanger coil is greater than or equal to a second intervention threshold temperature, and controlling the indoor fan to operate according to the set air speed if the temperature of the indoor heat exchanger coil is greater than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration. Namely, when the temperature of the second intervention threshold reaches the ideal state, the indoor fan is controlled to normally operate. The second intervention threshold temperature is preferably set to 37 degrees celsius. Meanwhile, when the temperature of the coil pipe of the indoor heat exchanger is larger than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration, the guide plate of the air supply outlet is controlled to recover to the set position from the cold air prevention position. The effective timing duration of the second timer is preferably set to 10s to avoid false control due to temperature fluctuation of the indoor coil.
As an auxiliary control means, when the indoor fan runs, the electric heating device is controlled to be started until the electric heating closing condition is met, and the electric heating device is controlled to be closed. The electric heating closing condition comprises that the temperature of the indoor coil is continuously 10 seconds and is more than or equal to 45 ℃, or the outdoor environment temperature is more than or equal to 0 ℃, or the indoor environment temperature is more than or equal to 24 ℃, or the exhaust temperature of the compressor reaches the set target exhaust temperature, or a user actively closes the electric heating.
The invention also discloses an air conditioning device, which adopts a control method. The control method can refer to the detailed description of any one of the above embodiments and the description of the drawings in the specification, and is not repeated herein. The air conditioning equipment adopting the control method can achieve the same technical effect.
Embodiments of the present application also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes an air conditioner to perform part or all of the steps of any one of the methods described in the above method embodiments.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the above-described units or modules is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be an electrical or other form.
The units described as the separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one physical space, or may also be distributed on a plurality of network units, and some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
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 (9)
1. A control method of an air conditioning apparatus is applied to a heating mode; the method is characterized by comprising the following steps:
when the air conditioner is started, the compressor is controlled to be increased to the natural frequency to operate, the outdoor fan works at the highest set rotating speed, and the electronic expansion valve is opened to the target opening degree;
the method comprises the following steps of judging an outdoor environment temperature interval where the real-time outdoor environment temperature is located, controlling the frequency of a compressor to be increased to a correction oil return frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval, and comprises the following steps:
determining whether the real-time outdoor environment temperature is less than or equal to a first outdoor environment temperature threshold; if the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold value, the real-time outdoor environment temperature is in a first outdoor environment temperature interval, and the compressor is controlled to be increased to the first correction oil return frequency; or
Determining whether the real-time outdoor ambient temperature is greater than a first outdoor ambient temperature threshold; if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, the real-time outdoor environment temperature is in a second outdoor environment temperature interval, and the compressor is controlled to be increased to the second correction oil return frequency;
wherein the first corrected oil return frequency is greater than a second corrected oil return frequency;
judging whether the timing of the first timer reaches the effective timing duration or not;
and when the timing of the first timer reaches the effective timing duration, controlling the compressor to increase the frequency to a target frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval.
2. The control method of an air conditioning apparatus according to claim 1,
when the timing of the first timer reaches the effective timing duration, controlling the compressor to increase the frequency to a target frequency corresponding to the outdoor environment temperature interval according to the judged outdoor environment temperature interval, and executing the following steps:
if the real-time outdoor environment temperature is in a first outdoor environment temperature interval, controlling the compressor to increase the frequency from the first correction oil return frequency to the maximum heating set frequency;
if the real-time outdoor environment temperature is in the second outdoor environment temperature interval, judging whether the real-time outdoor environment temperature is smaller than or equal to a second outdoor environment temperature threshold value; if the real-time outdoor environment temperature is less than or equal to a second outdoor environment temperature threshold value, controlling the compressor to increase the frequency from the second correction oil return frequency to a set maximum frequency limit frequency corresponding to the real-time outdoor environment temperature; if the real-time outdoor environment temperature is greater than the second outdoor environment temperature threshold, judging whether the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold, and if the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold, controlling the compressor to increase the frequency from the second correction oil return frequency to a set target frequency;
wherein the second outdoor ambient temperature threshold is greater than the first outdoor ambient temperature threshold.
3. The control method of an air conditioning apparatus according to claim 1 or 2,
before the outdoor environment temperature interval where the real-time outdoor environment temperature is located is judged, the method further comprises the following steps:
judging whether the real-time outdoor environment temperature is greater than the oil return protection outdoor environment temperature threshold value or not and whether the real-time indoor environment temperature is greater than the oil return protection indoor environment temperature threshold value or not;
and if the real-time outdoor environment temperature is greater than the oil return protection outdoor environment temperature threshold value and the real-time indoor environment temperature is greater than the oil return protection indoor environment temperature threshold value, controlling the compressor to increase the frequency from the natural frequency to the set maximum frequency limit frequency corresponding to the real-time outdoor environment temperature.
4. The control method of an air conditioning apparatus according to claim 3,
judging whether the temperature of the indoor heat exchanger coil is less than or equal to a first intervention threshold temperature, and controlling the indoor fan to be in a shutdown state if the temperature of the indoor heat exchanger coil is less than or equal to the first intervention threshold temperature; and if the temperature of the indoor coil pipe is greater than the first intervention threshold temperature, controlling the indoor fan to operate according to the lowest wind speed.
5. The control method of an air conditioning apparatus according to claim 4,
and judging whether the temperature of the coil of the indoor heat exchanger is greater than or equal to a second intervention threshold temperature or not, and controlling the indoor fan to operate according to the set wind speed if the temperature of the coil of the indoor heat exchanger is greater than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration.
6. The control method of an air conditioning apparatus according to claim 5,
and when the temperature of the coil pipe of the indoor heat exchanger is greater than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration, controlling the guide plate of the air supply outlet to recover to the set position from the cold air prevention position.
7. The control method of an air conditioning apparatus according to claim 6,
when the indoor fan operates, the electric heating device is controlled to be started until the electric heating closing condition is met, and the electric heating device is controlled to be closed.
8. The control method of an air conditioning apparatus according to claim 7,
the compressor runs according to the target frequency, and the running period timer starts to time;
and when the timing duration of the running period timer reaches the effective timing duration, controlling the running of the compressor according to a PID algorithm.
9. An air conditioning apparatus characterized by employing the control method according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910615275.9A CN112212480B (en) | 2019-07-09 | 2019-07-09 | Control method of air conditioning equipment and air conditioning equipment |
| PCT/CN2020/100886 WO2021004486A1 (en) | 2019-07-09 | 2020-07-08 | Air conditioning device control method and air conditioning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910615275.9A CN112212480B (en) | 2019-07-09 | 2019-07-09 | Control method of air conditioning equipment and air conditioning equipment |
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| CN113483480A (en) * | 2021-07-08 | 2021-10-08 | 珠海拓芯科技有限公司 | Frequency control method for variable frequency air conditioner and air conditioner |
| CN113531783B (en) * | 2021-07-21 | 2022-06-28 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
| CN113654183A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调电子有限公司 | Fault monitoring method of air conditioning unit |
| CN113847717B (en) * | 2021-08-23 | 2023-03-17 | 青岛海尔空调电子有限公司 | Air conditioner operation control method and device and air conditioner |
| CN114183880B (en) * | 2021-12-22 | 2023-04-28 | 宁波奥克斯电气股份有限公司 | Mildew-proof control method and air conditioner |
| CN114279142B (en) * | 2021-12-29 | 2023-11-14 | 海信容声（扬州）冰箱有限公司 | Refrigerator, variable frequency compressor system and control method of variable frequency compressor system |
| CN114322371B (en) * | 2021-12-30 | 2024-05-14 | 苏州英维克温控技术有限公司 | Control method and system of electric heating device |
| CN114322267B (en) * | 2022-01-04 | 2024-01-26 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN114543329B (en) * | 2022-01-17 | 2023-10-20 | 青岛海尔空调器有限总公司 | Oil return control method and device for air conditioner, air conditioner and storage medium |
| CN114427731B (en) * | 2022-01-24 | 2023-07-21 | 宁波奥克斯电气股份有限公司 | Fan rotating speed control method and device of air conditioner and air conditioner |
| CN114484734B (en) * | 2022-02-21 | 2024-06-04 | 北京小米移动软件有限公司 | Fault detection method and device for air conditioning system, air conditioner and medium |
| CN114608261B (en) * | 2022-03-08 | 2024-05-28 | 长虹美菱股份有限公司 | Refrigerator compressor start-stop optimization control method |
| CN114963473B (en) * | 2022-04-13 | 2023-10-03 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and air conditioner |
| CN115540178B (en) * | 2022-08-18 | 2024-05-24 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN115420005A (en) * | 2022-08-26 | 2022-12-02 | 宁波奥克斯电气股份有限公司 | Air conditioner heating control method and device and air conditioner |
| CN115930407A (en) * | 2022-11-28 | 2023-04-07 | 珠海格力电器股份有限公司 | Air conditioner control method and control device, air conditioner system and storage medium |
| CN115789890B (en) * | 2022-12-05 | 2024-06-11 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
| CN115978738B (en) * | 2022-12-13 | 2024-05-10 | 珠海格力电器股份有限公司 | Oil return control method and air conditioning system |
| CN115875818A (en) * | 2022-12-28 | 2023-03-31 | 宁波奥克斯电气股份有限公司 | Control method and control device of air conditioner, air conditioner and readable storage medium |
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| CN112212480A (en) | 2021-01-12 |
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