CN110594961B - Air conditioner control method and air conditioner - Google Patents
Air conditioner control method and air conditioner Download PDFInfo
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- CN110594961B CN110594961B CN201910853911.1A CN201910853911A CN110594961B CN 110594961 B CN110594961 B CN 110594961B CN 201910853911 A CN201910853911 A CN 201910853911A CN 110594961 B CN110594961 B CN 110594961B
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- 238000004140 cleaning Methods 0.000 claims abstract description 185
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
A control method of an air conditioner is applied to a heating mode and comprises the following steps: starting a self-cleaning function; sampling the real-time outdoor environment temperature and comparing the real-time outdoor environment temperature with a first outdoor environment temperature threshold; if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until the first outdoor self-cleaning period is finished; and if the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until a second outdoor self-cleaning period is finished, wherein the duration of the second outdoor self-cleaning period is smaller than that of the first outdoor self-cleaning period. An air conditioner is also disclosed. By the air conditioner control method, the self-cleaning control flow comprising indoor self-cleaning and outdoor self-cleaning can be automatically and intelligently optimized according to the current running condition of the air conditioner, particularly the outdoor environment temperature.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to an air conditioner control method and an air conditioner adopting the control method.
Background
After the air conditioner is placed or used for a long time, a large amount of dust and dirt exists in the air conditioner. The dust and dirt are attached to a heat exchanger of the indoor unit, so that on one hand, the heat exchange performance of the heat exchanger is reduced, and the performance of the air conditioner is reduced; on the other hand, the dust and dirt are easy to grow bacteria and form mildew stains. These bacteria and mold can cause odor in the air conditioner, which may affect the health of the air conditioner user if not cleaned in time.
To solve this problem, many self-cleaning control methods applied to air conditioners are provided in the prior art, and these control methods generally use an indoor heat exchanger as a main cleaning target, set a fixed time for the whole self-cleaning process, and automatically exit when the self-cleaning function is operated to the set time. For example, the following scheme is disclosed in the chinese patent application "cleaning control method and apparatus for heat exchanger of air conditioner" (application publication No. CN 106765926A): in the refrigeration mode, an indoor fan of the air conditioner is controlled to operate at a first preset rotating speed, so that condensed water is generated on the surface of a heat exchanger; reducing the evaporation temperature of the indoor heat exchanger or reducing the rotating speed of an indoor fan so as to frost or ice the surface of the indoor heat exchanger; when the frosting or icing is finished, acquiring the current outdoor temperature; when the current outdoor temperature is greater than or equal to a first preset temperature, controlling the air conditioner to switch to an air supply mode so as to defrost the air conditioner; and when the current outdoor temperature is lower than the first preset temperature, controlling the air conditioner to switch to a heating mode, and controlling the indoor fan to operate at a second preset rotating speed after the air conditioner is switched to the heating mode so as to defrost the indoor heat exchanger. And further discloses that the air conditioner is controlled to exit the heating mode when it is detected that the surface temperature of the indoor heat exchanger reaches a fourth preset temperature or when the air conditioner operates in the heating mode for a second preset time during the heating mode of the air conditioner. When the air conditioner exits the heating mode, the washing control process is ended.
In the prior art represented by the above publications, the self-cleaning control process cannot be effectively adjusted according to the actual operating condition of the air conditioner, thereby causing unnecessary waste of air conditioning efficiency to a certain extent.
Disclosure of Invention
The invention provides an air conditioner control method aiming at the problems that the time of a self-cleaning control process in the prior art is relatively fixed, the self-cleaning control process cannot be effectively adjusted according to the actual operation disclosure of an air conditioner, and the air conditioner efficiency is meaningless wasted to a certain extent.
The air conditioner control method is applied to a heating mode and comprises the following steps:
starting a self-cleaning function;
sampling the real-time outdoor environment temperature and comparing the real-time outdoor environment temperature with a first outdoor environment temperature threshold;
if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until the first outdoor self-cleaning period is finished;
and if the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until a second outdoor self-cleaning period is finished, wherein the duration of the second outdoor self-cleaning period is smaller than that of the first outdoor self-cleaning period.
Another aspect of the present invention provides an air conditioner, which employs the above air conditioner control method, and the air conditioner control method is applied to a heating mode, including the steps of: starting a self-cleaning function; sampling the real-time outdoor environment temperature and comparing the real-time outdoor environment temperature with a first outdoor environment temperature threshold; if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until the first outdoor self-cleaning period is finished; and if the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until a second outdoor self-cleaning period is finished, wherein the duration of the second outdoor self-cleaning period is smaller than that of the first outdoor self-cleaning period.
Compared with the prior art, the invention has the advantages and positive effects that: by the air conditioner control method, the self-cleaning control flow comprising the indoor self-cleaning and the outdoor self-cleaning can be automatically and intelligently optimized according to the current running condition of the air conditioner, particularly the outdoor environment temperature, when the outdoor environment temperature is higher, the period of the outdoor self-cleaning is relatively longer so as to ensure that enough frost layer is condensed on the outdoor heat exchanger, and the cleaning effect of the outdoor heat exchanger is improved while the cleaning requirement on the indoor heat exchanger is met; when the outdoor environment temperature is low, the period of outdoor self-cleaning is relatively short, so that the external low-temperature environment is fully utilized, a sufficient frost layer for cleaning is formed on the outdoor heat exchanger, and the overall energy consumption of the air conditioner is reduced. The air conditioner control method disclosed by the invention has the advantages of high intelligent degree and good practicability.
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 illustrating a first embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 2 is a flowchart of a second embodiment of the disclosed air conditioner control method;
FIG. 3 is a flow chart of a two-way reversing of a four-way valve;
FIG. 4 is a flowchart of a second embodiment of the disclosed air conditioner control method;
fig. 5 is a flowchart illustrating a third embodiment of a method for controlling 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.
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.
In the invention, the self-cleaning function of the air conditioner refers to that liquid water formed by condensation or surface frost layer melting of a heat exchanger in the air conditioner is utilized to clean the surface of the heat exchanger. In winter, if the air conditioner is set to operate in a heating mode, the self-cleaning function is started, namely, the four-way valve is controlled to perform reversing for one time, the indoor heat exchanger is controlled to work in an evaporator state, the outdoor heat exchanger works in a condenser state, the temperature of a cooling medium of the indoor heat exchanger in the evaporator state is gradually reduced, so that the surface temperature of the indoor heat exchanger is further reduced, and due to the fact that moisture is contained in air, condensate water is gradually formed on the surface of the indoor heat exchanger, and a frost layer is formed along with the reduction of the temperature of the cooling medium. When the frost layer is accumulated to an ideal degree, the four-way valve is controlled again to perform primary reversing, the indoor heat exchanger is controlled to work in a condenser state, the outdoor heat exchanger works in an evaporator state, the temperature of a cooling medium of the indoor heat exchanger in the condenser state is gradually increased, so that the surface temperature of the indoor heat exchanger is further increased, the frost layer is gradually melted, dust and mold attached to the surface of the indoor heat exchanger are washed away, and self-cleaning of the indoor heat exchanger is realized. On the contrary, the self-cleaning of the outdoor heat exchanger is divided into two parts, the first part is that when the outdoor heat exchanger works in a condensation state, the temperature of a cooling medium passing through the outdoor heat exchanger in the condenser state can be gradually increased, so that the surface temperature of the outdoor heat exchanger is further increased, and if a frost layer exists on the surface of the outdoor heat exchanger, partial outdoor self-cleaning effect is realized; the second part is that the outdoor heat exchanger is controlled to exchange heat with the surrounding environment according to the current operating outdoor environment working condition of the air conditioner, so as to melt the surface frost layer and realize the outdoor self-cleaning effect of the other part. Until the self-cleaning process is finished. The air conditioner resumes a normal operation process.
As shown in fig. 1, the air conditioner control method disclosed in the present invention includes the following steps.
In step S100, the air conditioner is in a heating mode.
And S101, actively starting a self-cleaning function through a self-cleaning key or automatically controlling to start the self-cleaning function.
And S102, intervening in the self-cleaning operation process after the four-way valve is switched twice according to the relation between the sampled real-time outdoor environment temperature and the first outdoor environment temperature threshold value.
And step S103-1, if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until the first outdoor self-cleaning period is finished.
And step S103-2, if the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until a second outdoor self-cleaning period is finished, wherein the duration of the second outdoor self-cleaning period is smaller than that of the first outdoor self-cleaning period. Thereby enabling a flexible control of the self-cleaning operation, which steps are described in further detail below with reference to other figures.
As shown in fig. 2, the method specifically includes the following steps:
in step S0, the air conditioner is in the heating mode.
And step S1, the self-cleaning function is started actively through the self-cleaning button or automatically controlled.
The self-cleaning key is arranged on a remote control device of the air conditioner, or a terminal or wearable equipment which establishes wireless communication with the air conditioner, or a control panel of the air conditioner. When the user triggers the self-cleaning function through the self-cleaning button, the self-cleaning control flow is entered, and the control steps shown in fig. 1 are started to be executed.
The self-cleaning function can be automatically started under the control of a program, and the air conditioner is controlled to interrupt the original running program to enter a self-cleaning control flow. The automatic opening can be based on the following ways: the first method is to accumulate the running time of the air conditioner, and when the accumulated running time of the air conditioner reaches the preset time, the air conditioner is controlled to automatically enter a self-cleaning control flow. And the second method is to receive sampling data of the detection module to obtain the dust deposition state on the surface of the indoor heat exchanger. And when the dust deposition state on the surface of the indoor heat exchanger exceeds a preset critical state, controlling to start the self-cleaning function.
Specifically for the second case, the sources of contaminants on the surface of the indoor heat exchanger are mainly classified into the dust source of the outdoor environment and the dust source of the indoor environment. The dust source of the outdoor environment, i.e., the atmospheric dust, is a pollutant that permeates into the air-conditioning case with the air as the air conditioner is used and operated, and includes natural dust in the air and artificial dust generated by activities. Because the concentration of natural dust and the concentration of artificial dust contained in air in various places are different, the concentration difference of outdoor environment dust sources is very large, even if the air conditioner is used in the same place for a long time, the fluctuation range is greatly larger than the parameters of temperature, humidity and the like along with the time difference. Also included in outdoor environmental dust sources are microbial particles, which are invisible and typically adhere to dust particles. Another major source of indoor heat exchanger surface contaminants for air conditioners is the dust source of the indoor environment, including people and building surfaces, dust generated by the operation of indoor equipment. Therefore, it is difficult to accurately judge the surface state of the indoor heat exchanger simply by accumulating the operation time. Compared with the prior art, the method is completely different from the prior art, namely, the accumulated dust amount of the outdoor environment dust source and the indoor environment dust source on the surface of the heat exchanger is accurately judged as much as possible, the starting and stopping of the self-cleaning function are further optimized, and the using effect of the self-cleaning function is improved.
The dust accumulation state of the outdoor environment dust source and the indoor environment dust source on the surface of the indoor heat exchanger is detected. In this embodiment, at least one detection module is provided on the air conditioner. The detection module is preferably arranged on the air inlet side of the indoor heat exchanger of the air conditioner. By monitoring the change of the dust deposition amount at the position, the dust deposition state on the surface of the indoor heat exchanger can be obtained. In one case, the detection module may be a pressure sensor; such as a capacitive pressure sensor. The capacitive pressure sensor is arranged on the surface of the indoor heat exchanger, such as the side close to the air inlet. Under an ideal cleaning state, the detection pressure of the detection module is small because no dust is accumulated; as air conditioning equipment is used, the amount of dust accumulates. The weight of accumulated dust enables a metal film in the capacitance type pressure sensor to sense pressure and deform, so that capacitance formed between the two electrodes changes, a received pressure detection value also changes, and the surface dust accumulation state of the indoor heat exchanger is obtained.
In order to increase the data processing speed of the air conditioner controller, it is preferable to establish a one-to-one correspondence relationship between the pressure detection value and the state of dust deposition on the surface of the indoor heat exchanger. When the pressure detection value meets the set condition, the corresponding data of the dust deposition state on the surface of the indoor heat exchanger can be directly called. In particular, a simulated experimental environment can be created in which artificial dust is blown across the heat exchanger surface where the pressure sensors are located at a given wind speed. The particle size of the artificial dust is set to be larger than that of the atmospheric dust, wherein the artificial dust comprises dust, carbon black and short fibers, and the artificial dust is formed according to a certain proportion, namely the artificial dust simulates the use environment of an air-conditioned room. When the dust deposition state on the surface of the indoor heat exchanger reaches a certain thickness, executing a self-cleaning function and keeping timing to reach an effective running preset value; the self-cleaning result is monitored. The process is repeated for multiple times until the maximum accumulated dust amount which can be cleaned in a period corresponding to an effective preset value of the air conditioner self-cleaning function is determined, after cleaning is finished, the surface of the indoor heat exchanger can achieve an ideal cleaning effect, the maximum accumulated dust amount is determined to be a critical state, and the pressure detection value of the pressure sensor before cleaning is the first preset pressure value.
In the operation process of the air conditioner, if the pressure detection value received by the controller from the pressure sensor is larger than or equal to a first preset pressure value, the surface dust deposition state of the indoor heat exchanger is judged to exceed a preset critical state, and the self-cleaning function is controlled to be started.
Of course, besides the pressure sensor, the dust deposition state on the surface of the indoor heat exchanger can be estimated through a light sensor arranged at the air return opening of the air conditioner or the detection of the filtering efficiency at the air return opening of the air conditioner. However, these methods are indirect estimation methods, and the test accuracy is low.
Step S10, after entering the self-cleaning control process, the real-time outdoor environment temperature is sampled and compared with the first outdoor environment temperature threshold.
In step S11, if it is determined that the real-time outdoor ambient temperature is greater than the first outdoor ambient temperature threshold, the performed self-cleaning procedure includes the following steps.
And step S12, firstly, controlling the four-way valve to perform first reversing, controlling the indoor heat exchanger to work in an evaporator state, and controlling the outdoor heat exchanger to work in a condenser state.
And step S13, turning the four-way valve for the first time, closing the indoor fan to prevent cold air from being blown onto the user, controlling the outdoor fan to operate according to the set wind speed in the self-cleaning mode, keeping the compressor at the first self-cleaning set operation frequency, and keeping the electronic expansion valve at the first self-cleaning set operation opening degree. The first self-cleaning setting operation frequency is a fixed frequency value and is stored in a storage unit of the controller for being called at any time. The first self-cleaning set operation opening degree is also a fixed opening degree, and is also stored in a storage unit of the controller for calling at any time, similar to the self-cleaning operation frequency.
And step S14, after the four-way valve is switched for the first time, the cooling medium in a high-temperature and high-pressure state is discharged from the compressor, enters the outdoor heat exchanger through the four-way valve, is condensed into medium-temperature and medium-pressure cooling medium liquid in the outdoor heat exchanger, is throttled by the electronic expansion valve into low-temperature and low-pressure cooling medium liquid, and flows into the indoor heat exchanger. Due to the inflow of the cooling medium with low temperature and low pressure, the surface temperature of the indoor heat exchanger drops at a fast speed, and a frost layer is gradually formed on the surface. In order to accelerate the frosting process of the indoor heat exchanger, the outdoor fan in the self-cleaning mode is preferably set to set the wind speed to be the set rotating speed corresponding to a strong force or a high wind gear, the first self-cleaning set operation opening is a higher opening, for example, the operation opening is set to be 280 plus 300 steps, so that the cooling medium entering the indoor heat exchanger has enough liquid supply amount, the cooling medium sent into the indoor heat exchanger in unit time is equal to the liquid amount capable of being evaporated, the liquid shortage in the indoor heat exchanger is avoided, the heat exchange area of the indoor heat exchanger can be fully utilized, the frosting is full, and the dust on the surface of the indoor heat exchanger is washed away. It is determined whether a set operation time is reached or whether the indoor heat exchanger surface temperature drops to a set surface temperature.
And step S15, after the four-way valve is switched for the first time and runs to the set running time or the surface temperature of the indoor heat exchanger is reduced to the set surface temperature, the frosting on the surface of the indoor heat exchanger is sufficient. And executing a secondary reversing process of the four-way valve. Different from the simple reversing action of the traditional four-way valve, the surface frosting condition of the heat exchanger is obtained by indirect conversion according to the running time or the temperature detection signal of one temperature measurement point on the surface of the indoor heat exchanger, and inevitably, deviation may exist compared with the real condition, for example, the condition of uneven frosting may occur.
To solve this problem and improve the self-cleaning effect, in this embodiment, as shown in fig. 3, the secondary reversing process of the four-way valve includes:
in step S30, control first starts a separate timing routine.
Step S31, when the timing is started, the operation states of the indoor fan and the outdoor fan are kept unchanged, the electronic expansion valve is controlled to open from the first self-cleaning set operation opening degree to a correction opening degree, the correction opening degree is the product of the first self-cleaning set operation opening degree and a correction coefficient, wherein the correction coefficient is larger than 1 and is set to be 1.25 to 1.3, and the correction coefficient is also stored in a storage unit of the controller and can be called at any time. While moderately reducing the compressor operating frequency. In the whole set reversing period, the electronic expansion valve is kept in the corrected opening degree operation, so that the effective area of the indoor heat exchanger in the evaporator state is utilized to the maximum extent, and the optimal matching is formed. The commutation period is preferably set to 1.5 to 2 minutes.
In step S32, the commutation period is set to end.
And step S33, the four-way valve executes reversing action.
And step S16, after the set reversing period is finished, the four-way valve acts, the cooling medium in a high-temperature and high-pressure state is discharged from the compressor, enters the indoor heat exchanger through the four-way valve, is condensed into the refrigeration liquid in a medium-temperature and medium-pressure state in the indoor heat exchanger, is throttled by the electronic expansion valve to become the cooling medium liquid in a low-temperature and low-pressure state, and flows to the outdoor heat exchanger, the indoor heat exchanger works in a condenser state, and the outdoor heat exchanger works in an evaporator state.
And step S17, further increasing the operation frequency of the compressor to a second self-cleaning set operation frequency, and controlling the electronic expansion valve to close the valve from the self-correcting opening to a second self-cleaning set operation opening. The second self-cleaning set operation frequency is higher than the first self-cleaning set operation frequency, the second self-cleaning set operation opening degree is lower than the first self-cleaning set operation opening degree, and the second self-cleaning set operation opening degree is preferably a fixed value and is stored in a storage unit of the controller for being called at any time. The second self-cleaning setting operation opening degree is preferably set to 220 steps.
Step S18, in the process of the four-way valve reversing for the first time to the end of the set reversing period, because the outdoor heat exchanger is in the condenser state, if there is a frost layer on the surface of the outdoor heat exchanger, the outdoor heat exchanger is partially melted when in the condenser state, and a part of the outdoor self-cleaning process is completed. But then the frost layer on the surface of the outdoor heat exchanger may not be sufficient to produce enough condensation water for self-cleaning outdoors, and there may even be cases where there is no frost layer at all. Therefore, it is desirable to form a certain amount of new frost layer on the outdoor heat exchanger while defrosting the indoor heat exchanger. At this stage, the outdoor fan is controlled to operate according to the set wind speed of the self-cleaning mode, the compressor is kept at the second self-cleaning set operation frequency, the electronic expansion valve is kept at the second self-cleaning set operation opening degree to operate until the first outdoor self-cleaning period is finished, at this moment, the surface temperature of the indoor heat exchanger rises, the frost layer melts, and the surface of the outdoor heat exchanger is condensed again with enough frost layer. The first outdoor self-cleaning period is preferably a fixed value obtained through an experiment, and may also be an estimated value obtained through estimation according to the average humidity and temperature of the current time period (such as one month and one week) of the installation area of the air conditioner. The average humidity and temperature of the air conditioner installation area can be obtained from the cloud through communication with the server. In the process, when the surface temperature of the indoor heat exchanger rises and exceeds the defrosting set temperature, the frost layer melts, and the indoor self-cleaning is finished.
And step S19, when the first outdoor self-cleaning period is finished, further controlling the compressor to stop, starting the outdoor fan, and exchanging heat between the outdoor heat exchanger and outdoor air until the heat exchange period is finished, so as to finish the other part of outdoor self-cleaning process and achieve the purpose of saving energy consumption. The heat exchange period is preferably set to 0.5min to 1 min.
And step S2, finishing the whole self-cleaning process and recovering normal operation.
As shown in fig. 4, if the sampled real-time temperature is less than the first outdoor ambient temperature threshold, the self-cleaning procedure performed comprises the following steps:
and step S22, firstly, controlling the four-way valve to perform first reversing, controlling the indoor heat exchanger to work in an evaporator state, controlling the outdoor heat exchanger to work in a condenser state, reducing the surface temperature of the indoor heat exchanger at a higher speed by using the low-temperature and low-pressure cooling medium, and maintaining the process until the operation time is set or the surface temperature of the indoor heat exchanger is reduced to the set surface temperature.
Step S23, in this process, the outdoor fan is controlled to operate according to the set wind speed of the self-cleaning mode, the compressor is maintained at the first self-cleaning set operation frequency, and the electronic expansion valve is maintained at the first self-cleaning set operation opening degree.
And step S24, the four-way valve is firstly switched to run to the set running time or the surface temperature of the indoor heat exchanger is reduced to the set surface temperature.
And step S25, executing a secondary reversing process of the four-way valve, firstly controlling the electronic expansion valve to open and maintain the electronic expansion valve to operate at the corrected opening until the set reversing period is finished, and simultaneously reducing the operation frequency of the compressor and keeping the operation states of the indoor fan and the outdoor fan unchanged in the set reversing period.
And step S26, reversing the four-way valve for the second time, controlling the indoor heat exchanger to work in a condenser state, and controlling the outdoor heat exchanger to work in an evaporator state, so that the surface temperature of the indoor heat exchanger rises. For the purpose of desiring a certain amount of new frost layer to be formed on the outdoor heat exchanger and based on the current operating condition, the real-time outdoor ambient temperature is less than the first outdoor ambient temperature threshold, the current ambient temperature is low, and the outdoor heat exchanger is prone to frost.
Therefore, at this stage, as shown in step S27, the outdoor fan is controlled to operate at the set wind speed in the self-cleaning mode, the compressor is maintained at the second self-cleaning set operation frequency, and the electronic expansion valve is maintained at the second self-cleaning set operation opening degree. The second self-cleaning setting operation frequency is higher than the first self-cleaning setting operation frequency, and the second self-cleaning setting operation opening degree is lower than the first self-cleaning setting operation opening degree until it is determined in step S28 that the second outdoor self-cleaning period is finished, and the second outdoor self-cleaning period is generated according to the first outdoor self-cleaning period. The second outdoor self-cleaning period is smaller than the first outdoor self-cleaning period for the purpose of saving energy consumption. According to the relation between the first outdoor environment temperature threshold and the first outdoor self-cleaning period, through multiple times of test measurement, the second outdoor self-cleaning period is preferably set to be one half of the first outdoor self-cleaning period. Upon reaching the second outdoor self-cleaning cycle, the surface temperature of the indoor heat exchanger rises, the frost layer melts, and the outdoor heat exchanger surface recondenses a sufficient amount of the frost layer.
And step S29, further controlling the compressor to stop, starting the outdoor fan, exchanging heat between the outdoor heat exchanger and the outdoor air until the heat exchange period is finished, completing the other part of outdoor self-cleaning process, and achieving the purpose of saving energy consumption.
As shown in fig. 5, when the sampled real-time temperature is less than the first outdoor-environment-temperature threshold value, it is preferable to further compare the real-time temperature with a corrected-environment-temperature threshold value in step S42, where the corrected-environment-temperature threshold value is a difference between the first outdoor-environment-temperature threshold value and the outdoor-environment-temperature correction value. If the sampled real-time temperature is smaller than the corrected environment temperature threshold value, the current environment temperature is very low, a frost layer is very easily formed on the surface of the outdoor heat exchanger and is thick, in this state, after the four-way valve is switched for the second time, the outdoor fan is controlled to operate according to the set wind speed of the self-cleaning mode, the compressor is kept at the second self-cleaning set operation frequency, the electronic expansion valve is kept at the second self-cleaning set opening degree to operate until the frost layer on the surface of the indoor heat exchanger is melted, and if the set operation time is reached or the surface temperature of the indoor heat exchanger reaches the set temperature, the whole self-cleaning process is finished. The frost layer condensed on the surface of the outdoor heat exchanger can be melted during the forced defrosting operation of the heating mode, and the self-cleaning effect is realized.
Since the outdoor ambient temperature may fluctuate due to interference factors. Therefore, it is preferred that a plurality of real-time outdoor ambient temperatures are sampled in successive sampling periods. And if the plurality of real-time outdoor environment temperatures are all larger than the first outdoor environment temperature threshold value, judging that the real-time outdoor environment temperature is larger than the first outdoor environment temperature threshold value. And if the plurality of real-time outdoor environment temperatures are all smaller than the first outdoor environment temperature threshold value, determining that the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value. The same applies to the comparison with the corrected ambient temperature threshold. Wherein the first outdoor ambient temperature threshold is set at 2 ℃ to 5 ℃ and the corrected ambient temperature threshold is preferably set at 5 ℃.
By the air conditioner control method, the self-cleaning control flow comprising the indoor self-cleaning and the outdoor self-cleaning can be automatically and intelligently optimized according to the current running condition of the air conditioner, particularly the outdoor environment temperature, when the outdoor environment temperature is higher, the period of the outdoor self-cleaning is relatively longer so as to ensure that enough frost layer is condensed on the outdoor heat exchanger, and the cleaning effect of the outdoor heat exchanger is improved while the cleaning requirement on the indoor heat exchanger is met; when the outdoor environment temperature is low, the period of outdoor self-cleaning is relatively short, so that the external low-temperature environment is fully utilized, a sufficient frost layer for cleaning is formed on the outdoor heat exchanger, and the overall energy consumption of the air conditioner is reduced. The air conditioner control method disclosed by the invention has the advantages of high intelligent degree and good practicability.
Because the running state of the air conditioner can be changed when self-cleaning is carried out, when the dust deposition state on the surface of the indoor heat exchanger exceeds a preset critical state, a reminding signal is output. Specifically, the detection module can directly transmit the sampling data to the indoor unit controller in a serial communication mode, and can also transmit the sampling data to a personal computer, a remote server, a handheld device, a smart phone and/or wearable equipment in a wireless communication mode, and the equipment further transmits the sampling data to the indoor controller; or the indoor unit controller transmits the sample to a personal computer, a remote server, a handheld device, a smart phone, and/or a wearable device. The wireless communication may be in a one-to-one communication mode, or through one or more servers in a local area network, or through a cloud server. Like this, these equipment all can obtain alarm signal, and the form of concrete embodiment includes that there is the sign that exceeds preset critical state to light and twinkle on the display screen, and user's cell-phone APP receives the warning, and the sign on the air conditioner remote controller lights and twinkles to and voice broadcast etc.. The user may autonomously select whether to perform the self-cleaning procedure.
The embodiment of the application also provides an air conditioner and a control method applying the air conditioner. The specific steps of the air conditioner control method are described in detail with reference to the detailed description of the above embodiments and the drawings in the specification. No further description is given here, and the air conditioner adopting the air conditioner control method can achieve the same technical effects.
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 (8)
1. A control method of an air conditioner is applied to a heating mode and is characterized by comprising the following steps:
in the running process of the air conditioner, if the pressure detection value received by the controller from the pressure sensor is greater than or equal to a first preset pressure value, determining that the surface dust deposition state of the indoor heat exchanger exceeds a preset critical state, and controlling to start a self-cleaning function; the pressure sensor is arranged on one side, close to the air inlet, of the surface of the indoor heat exchanger, and the first preset pressure value is obtained through the following steps:
creating a simulated experiment environment, and blowing artificial dust on the surface of a heat exchanger provided with a pressure sensor according to a set wind speed, wherein the artificial dust comprises dust, carbon black and short fibers; when the dust accumulation state of the indoor heat exchanger reaches a set thickness, executing a self-cleaning function and keeping timing to reach an effective running preset value; monitoring a self-cleaning result; repeating the process for multiple times until the maximum accumulated dust volume which can be cleaned by the self-cleaning function of the air conditioner in a period corresponding to the effective preset running value is determined; the maximum accumulated dust amount is a critical state, after cleaning is finished in the critical state, the surface of the indoor heat exchanger can achieve an ideal cleaning effect, and the pressure detection value of the pressure sensor before cleaning corresponding to the maximum accumulated dust amount is the first preset pressure value;
sampling the real-time outdoor environment temperature and comparing the real-time outdoor environment temperature with a first outdoor environment temperature threshold;
controlling a four-way valve to reverse for the first time, controlling an indoor heat exchanger to work in an evaporator state, controlling an outdoor heat exchanger to work in a condenser state, closing an indoor fan, controlling the air speed of the outdoor fan to be a set air speed in a self-cleaning mode, controlling the frequency of a compressor to be a first self-cleaning set operation frequency, and controlling the opening degree of an electronic expansion valve to be a first self-cleaning set operation opening degree;
executing a secondary reversing process of the four-way valve, and controlling the indoor heat exchanger to work in a condenser state and the outdoor heat exchanger to work in an evaporator state;
if the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until the first outdoor self-cleaning period is finished;
if the real-time outdoor environment temperature is lower than the first outdoor environment temperature threshold value, controlling the air conditioner to execute self-cleaning operation after the four-way valve switches for the second time until the second outdoor self-cleaning period is finished;
wherein the duration of the second outdoor self-cleaning period is less than the duration of the first outdoor self-cleaning period;
the secondary reversing process comprises the following steps:
starting timing;
controlling the indoor fan to be closed, controlling the air speed of the outdoor fan to be the set air speed of the self-cleaning mode, controlling the electronic expansion valve to be opened from the first self-cleaning set operation opening degree to the correction opening degree, and controlling and reducing the frequency of the compressor;
controlling the electronic expansion valve to operate at the corrected opening degree until the set reversing period is finished;
the four-way valve executes secondary reversing action;
wherein the correction opening is a product of the first self-cleaning set operation opening and a correction factor, the correction factor being greater than 1.
2. The air conditioner controlling method according to claim 1,
in the first outdoor self-cleaning period or the second outdoor self-cleaning period, controlling the air speed of an outdoor fan to be a set air speed of a self-cleaning mode, controlling the frequency of a compressor to be a second self-cleaning set operation frequency, and controlling the opening degree of an electronic expansion valve to be a second self-cleaning set operation opening degree; the second self-cleaning set operation frequency is greater than the first self-cleaning set operation frequency, and the second self-cleaning set operation opening degree is smaller than the first self-cleaning set operation opening degree.
3. The air conditioner controlling method according to claim 2,
and after the first outdoor self-cleaning period or the second outdoor self-cleaning period is finished, controlling the compressor to stop, controlling the outdoor fan to be in the running state until the heat exchange period is finished, and exiting from the self-cleaning mode.
4. The air conditioner controlling method according to claim 3,
and when the real-time outdoor environment temperature is sampled, sampling a plurality of real-time outdoor environment temperatures in continuous sampling periods, if the real-time outdoor environment temperatures are all larger than the first outdoor environment temperature threshold value, judging that the real-time outdoor environment temperature is larger than the first outdoor environment temperature threshold value, and if the real-time outdoor environment temperatures are all smaller than the first outdoor environment temperature threshold value, judging that the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value.
5. The air conditioner controlling method according to claim 1, further comprising the steps of:
if the real-time outdoor environment temperature is less than the first outdoor environment temperature threshold, comparing the real-time outdoor environment temperature with a correction outdoor environment temperature threshold; if the real-time outdoor environment temperature is larger than the threshold value of the corrected outdoor environment temperature, controlling the air conditioner to execute self-cleaning operation after the four-way valve is switched for the second time until the second outdoor self-cleaning period is finished;
if the real-time outdoor environment temperature is smaller than the threshold value of the corrected outdoor environment temperature, after the four-way valve switches for the second time, controlling the air speed of an outdoor fan to be the set air speed of the self-cleaning mode, controlling the frequency of a compressor to be the second self-cleaning set operation frequency, controlling the opening degree of an electronic expansion valve to be the second self-cleaning set opening degree until the set operation time is reached or the surface temperature of the indoor heat exchanger reaches the set temperature, and ending the self-cleaning process;
wherein the corrected outdoor ambient temperature threshold is a difference between the first outdoor ambient temperature threshold and the outdoor ambient temperature correction value.
6. The air conditioner controlling method according to claim 5,
and when the real-time outdoor environment temperature is sampled, sampling a plurality of real-time outdoor environment temperatures in continuous sampling periods, if the real-time outdoor environment temperatures are all larger than a first outdoor environment temperature threshold value and/or a correction outdoor environment temperature threshold value, judging that the real-time outdoor environment temperature is larger than the first outdoor environment temperature threshold value and/or the correction outdoor environment temperature threshold value, and if the real-time outdoor environment temperatures are all smaller than the first outdoor environment temperature threshold value and/or the correction outdoor environment temperature threshold value, judging that the real-time outdoor environment temperature is smaller than the first outdoor environment temperature threshold value and/or the correction outdoor environment temperature threshold value.
7. The air conditioner controlling method according to claim 1,
the duration of the first outdoor self-cleaning period is 2 times of the duration of the second outdoor self-cleaning period.
8. An air conditioner characterized by applying the air conditioner controlling method as set forth in any one of claims 1 to 7.
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| CN111380152B (en) * | 2020-03-27 | 2021-12-17 | 广东美的制冷设备有限公司 | High-temperature sterilization control method and device, air conditioner and storage medium |
| CN111473469B (en) * | 2020-04-28 | 2021-07-16 | 宁波奥克斯电气股份有限公司 | Air conditioner cleaning control method and device and air conditioner |
| CN112254301B (en) * | 2020-09-30 | 2022-12-20 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner and air conditioner |
| CN112628978B (en) * | 2021-02-03 | 2021-09-10 | 成都博瑞科传科技有限公司 | Indoor environment control method based on indoor electric appliance |
| CN113266919B (en) * | 2021-05-26 | 2022-08-26 | 珠海格力电器股份有限公司 | Fan blade self-cleaning control method of air conditioner outdoor unit and air conditioner |
| CN114216258B (en) * | 2021-12-02 | 2024-06-18 | 青岛海尔空调器有限总公司 | Method and device for self-cleaning air conditioner and air conditioner |
| CN114234709A (en) * | 2021-12-11 | 2022-03-25 | 格力电器（合肥）有限公司 | Heat exchange equipment and air conditioner convenient to it is clean |
| CN114992765B (en) * | 2022-05-07 | 2024-02-20 | 青岛海尔空调电子有限公司 | Air conditioning system and self-cleaning control method thereof |
| CN115654694A (en) * | 2022-11-04 | 2023-01-31 | 青岛海尔空调器有限总公司 | Control method and control device of air conditioner and air conditioner |
| WO2024114700A1 (en) * | 2022-11-30 | 2024-06-06 | 海信（广东）空调有限公司 | Air conditioner and self-cleaning control method therefor |
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| CN106152413B (en) * | 2016-07-27 | 2019-02-05 | 青岛海尔空调器有限总公司 | Machine cleaning method inside and outside air-conditioning |
| CN106322660A (en) * | 2016-08-23 | 2017-01-11 | 广东美的制冷设备有限公司 | Self-cleaning control method and device for evaporator of air conditioner |
| CN106594976B (en) * | 2016-11-11 | 2018-12-18 | 青岛海尔空调器有限总公司 | Machine cleaning method inside and outside air-conditioning |
| CN109489189B (en) * | 2017-09-08 | 2020-10-23 | 奥克斯空调股份有限公司 | Cleaning method of air conditioner |
| CN108413562A (en) * | 2018-02-05 | 2018-08-17 | 青岛海尔空调器有限总公司 | A kind of self-cleaning control method and device of air-conditioning |
| JP2018200167A (en) * | 2018-05-29 | 2018-12-20 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN109114745A (en) * | 2018-08-31 | 2019-01-01 | 海信（山东）空调有限公司 | Convertible frequency air-conditioner outdoor heat exchanger automatically cleaning control method and air conditioner |
| CN109253525B (en) * | 2018-08-31 | 2021-04-30 | 海信（山东）空调有限公司 | Self-cleaning control method for outdoor heat exchanger of fixed-frequency air conditioner and air conditioner |
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