CN113137709A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
- Publication number
- CN113137709A CN113137709A CN202110482374.1A CN202110482374A CN113137709A CN 113137709 A CN113137709 A CN 113137709A CN 202110482374 A CN202110482374 A CN 202110482374A CN 113137709 A CN113137709 A CN 113137709A
- Authority
- CN
- China
- Prior art keywords
- operation mode
- air conditioner
- defrosting operation
- defrosting
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners and aims to solve the problem that the comfort level of an indoor environment is seriously influenced by reverse circulation operation when the frosting of an outdoor heat exchanger is detected in a heating mode of the conventional air conditioner. To this end, the present invention provides an air conditioner and a control method thereof, the control method including: acquiring the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger; when To is less than or equal To a first preset temperature, Te is less than or equal To a second preset temperature, and To and Te are in a decreasing trend, acquiring the indoor personnel density; controlling the air conditioner to selectively execute a defrosting operation mode according to the personnel density; the first preset temperature range is 18-22 ℃, the second preset temperature range is-5-0 ℃, the defrosting operation mode comprises a low-load defrosting operation mode, a first defrosting operation mode and a second defrosting operation mode, the defrosting intensity of the first defrosting operation mode is smaller than that of the second defrosting operation mode, the influence on the indoor temperature is reduced, and the comfort level of the indoor environment is guaranteed.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides an air conditioner and a control method thereof.
Background
With the continuous improvement of the living standard of people, the air conditioner becomes a common electric appliance in the life of people.
In the heating operation process of the air conditioner, the frosting condition of the outdoor heat exchanger is easy to occur. The air conditioner automatically controls the air conditioner to run a reverse circulation defrosting operation under the condition that the air conditioner detects that the outdoor heat exchanger is frosted, namely, the four-way valve is controlled to reverse, so that the refrigerant in a circulation loop flows backwards, the high-temperature high-pressure gaseous refrigerant discharged from the exhaust port of the compressor enters the outdoor heat exchanger to be radiated and changed into the high-temperature high-pressure liquid refrigerant, so that a frost layer condensed on the outer surface of the outdoor heat exchanger is melted, the high-temperature high-pressure liquid refrigerant enters the indoor heat exchanger to be evaporated and absorbed to be changed into the low-temperature low-pressure gaseous refrigerant after being throttled and depressurized by the throttling element, and the low-temperature low-pressure gaseous refrigerant returns to the compressor from the air return port of the compressor. Such a defrosting operation has a great influence on the indoor temperature and seriously affects the comfort of the indoor environment.
Therefore, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the comfort of the indoor environment is seriously affected by the reverse circulation operation performed when the frosting of the outdoor heat exchanger is detected in the heating mode of the conventional air conditioner, the present invention provides a control method of an air conditioner, the control method including: acquiring the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger; when To is less than or equal To a first preset temperature, Te is less than or equal To a second preset temperature, and To and Te are in a decreasing trend, acquiring the indoor personnel density; controlling the air conditioner to selectively execute a defrosting operation mode according to the personnel density; the defrosting operation mode comprises a low-load defrosting operation mode, a first defrosting operation mode and a second defrosting operation mode, wherein the first preset temperature ranges from 18 ℃ to 22 ℃, the second preset temperature ranges from-5 ℃ to 0 ℃, the defrosting operation mode comprises a low-load defrosting operation mode, the first defrosting operation mode and the second defrosting operation mode, and the defrosting intensity of the first defrosting operation mode is smaller than that of the second defrosting operation mode.
In a preferred embodiment of the above control method, the step of controlling the air conditioner to selectively perform the defrosting operation mode according to the person density includes: and if the personnel density is larger than or equal to the first threshold value, controlling the air conditioner to execute the low-load frost-inhibiting operation mode.
In the preferable technical scheme of the control method, if the second threshold is less than or equal To the personnel density and less than the first threshold, whether To and Te meet a first defrosting condition is judged; and controlling the air conditioner to selectively execute the first defrosting operation mode according to the judgment result.
In a preferred embodiment of the above control method, the step of "controlling the air conditioner to selectively perform the first defrosting operation mode according to the determination result" includes: and if To and Te meet the first defrosting condition, controlling the air conditioner To execute the first defrosting operation mode.
In a preferred embodiment of the above control method, the step of "controlling the air conditioner to selectively perform the first defrosting operation mode according to the determination result" includes: if To and Te do not meet the first defrosting condition, judging whether To and Te meet a second defrosting condition; and if To and Te meet the second defrosting condition, controlling the air conditioner To execute the second defrosting operation mode.
In a preferred embodiment of the above control method, the step of controlling the air conditioner to selectively perform the defrosting operation mode according to the person density further includes: if the personnel density is less than a second threshold value, judging whether To and Te meet a second defrosting condition; and controlling the air conditioner to selectively execute the second defrosting operation mode according to the judgment result.
In a preferred embodiment of the above control method, the step of "controlling the air conditioner to selectively perform the second defrosting operation mode according to the determination result" includes: if To and Te meet a second defrosting condition, controlling the air conditioner To execute the second defrosting operation mode; and if To and Te do not meet the second defrosting condition, controlling the air conditioner To normally operate.
In a preferred embodiment of the above control method, after the step of "controlling the air conditioner to perform the low load frost suppression operation mode", the control method further includes: judging whether the current temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger meet a first defrosting condition or not; and controlling the air conditioner to selectively execute the first defrosting operation mode according to the judgment result.
In a preferred embodiment of the above control method, the step of "determining whether the current temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger satisfy the first defrosting condition" includes: and after the air conditioner executes the low-load defrosting operation mode for a set time, judging whether the current temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger meet a first defrosting condition.
In the technical scheme of the invention, the control method of the air conditioner comprises the following steps: acquiring the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger; when To is less than or equal To a first preset temperature, Te is less than or equal To a second preset temperature, and To and Te are in a decreasing trend, acquiring the indoor personnel density; controlling the air conditioner to selectively execute a defrosting operation mode according to the personnel density; the defrosting operation mode comprises a low-load defrosting operation mode, a first defrosting operation mode and a second defrosting operation mode, wherein the first preset temperature ranges from 18 ℃ to 22 ℃, the second preset temperature ranges from-5 ℃ to 0 ℃, the defrosting operation mode comprises a low-load defrosting operation mode, the first defrosting operation mode and the second defrosting operation mode, and the defrosting intensity of the first defrosting operation mode is smaller than that of the second defrosting operation mode.
By the control method, under the condition that the outdoor heat exchanger of the air conditioner is easy to frost, the indoor personnel density is obtained, and the defrosting operation mode is selectively executed according to the personnel density, so that the influence of defrosting operation on the indoor temperature can be reduced, the comfort level of the indoor environment is ensured, the time length of a frost layer on the outdoor heat exchanger can be reduced as much as possible, the influence of frosting on the heat exchange performance of the outdoor heat exchanger is reduced, and the efficiency of the air conditioner is improved.
In another aspect, the present invention also provides an air conditioner, including: a memory; a processor; and a computer program stored in the memory and configured to be executed by the processor to implement the control method of the air conditioner in the above-described technical solution.
It should be noted that the air conditioner has all the technical effects of the above control method, and details are not described herein.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a diagram of main steps of a control method of an air conditioner according to the present invention;
fig. 2 is a flowchart of a control method of an air conditioner according to a first embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to a second embodiment of the present invention.
Detailed Description
First, it should be understood by those skilled in the art that the embodiments described below are merely for explaining technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, the control method of the air conditioner of the present invention is suitable for a wall-mounted air conditioner, a cabinet air conditioner, a fresh air conditioner, or the like. Obviously, the technical solution after adjustment still falls into the protection scope of the present invention.
It should be noted that the terms "first" and "second" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
A control method of an air conditioner according to the present invention will be described with reference to fig. 1. Fig. 1 is a main step diagram of a control method of an air conditioner according to the present invention.
Based on the problem that the comfort level of an indoor environment is seriously influenced by reverse circulation operation when the existing air conditioner detects that an outdoor heat exchanger is frosted in a heating mode in the background art, the invention provides a control method of the air conditioner.
As shown in fig. 1, the control method of the air conditioner of the present invention mainly includes the following steps:
and S100, acquiring the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger.
For example, a first temperature sensor is disposed on an outdoor unit of an air conditioner, and a second temperature sensor is disposed on a surface of an outdoor heat exchanger. The first temperature sensor and the second temperature sensor respectively detect the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger and send the temperatures To the controller of the air conditioner.
And S200, acquiring the indoor personnel density when To is less than or equal To a first preset temperature, Te is less than or equal To a second preset temperature, and To and Te are in a decreasing trend.
The controller judges whether the temperature To of the outdoor environment is less than or equal To a first preset temperature, whether the temperature Te of the outdoor heat exchanger is less than or equal To a second preset temperature, and whether the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger are in a decreasing trend. The first preset temperature is 18-22 ℃, and the second preset temperature is-5-0 ℃, namely the first preset temperature can be any value of 18-22 ℃, the second preset temperature can be any value of-5-0 ℃, for example, the first preset temperature is 20 ℃, and the second preset temperature is-1 ℃. The controller can detect the temperatures To of the outdoor environments and the temperatures Te of the outdoor heat exchangers respectively in a set time (such as 10s) through the first temperature sensor and the second temperature sensor, so as To judge whether the temperatures To and Te of the outdoor heat exchangers are in a decreasing trend. And when the temperature To of the outdoor environment is less than or equal To 20 ℃, the temperature Te of the outdoor heat exchanger is less than or equal To minus 1 ℃, and the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger are in a decreasing trend, acquiring the indoor personnel density.
For example, the air conditioner is provided with a space size detecting device connected to the controller, such as an acoustic wave distance measuring device (e.g., a space size detecting device to which millimeter wave technology is applied), an infrared ray distance measuring device, or other suitable distance measuring device, etc., which can detect the length and width of the room and transmit the same to the controller. Of course, the area of the room may be directly stored in the controller by the installer at the time of installation of the air conditioner. The air conditioner is also provided with a personnel detection device which can be an infrared sensor, a face recognition device or other devices capable of recognizing personnel and the like arranged on an indoor unit of the air conditioner, and the personnel detection device is connected with a controller of the air conditioner. The personnel detection device detects the number of people in the room and sends the number of people to the controller. The controller divides the received number of people by the area of the room to obtain the density of people in the room.
And step S300, controlling the air conditioner to selectively execute a defrosting operation mode according to the personnel density.
The defrosting operation mode comprises a low-load defrosting operation mode, a first defrosting operation mode and a second defrosting operation mode, and the defrosting intensity of the first defrosting operation mode is smaller than that of the second defrosting operation mode.
Through the arrangement, under the condition that the outdoor heat exchanger of the air conditioner is easy to frost, the indoor personnel density is obtained, and the defrosting operation mode is selectively executed according to the personnel density, so that the influence of defrosting operation on the indoor temperature can be reduced, the comfort level of the indoor environment is ensured, the time length of a frost layer on the outdoor heat exchanger can be reduced as much as possible, the influence of frosting on the heat exchange performance of the outdoor heat exchanger is reduced, and the efficiency of the air conditioner is improved.
A control method of an air conditioner according to a first embodiment of the present invention will be described with reference to fig. 2. Fig. 2 is a flowchart of a control method of an air conditioner according to a first embodiment of the present invention.
As shown in fig. 2, in a first embodiment, a control method of an air conditioner includes:
and S100, acquiring the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger.
Step S210, judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet the following conditions: to is less than or equal To the first preset temperature, Te is less than or equal To the second preset temperature, and To and Te are in decreasing trend, if yes, the step S220 is executed, and if not, the step S100 is returned To.
And S220, acquiring the indoor personnel density.
After step S220, step S311, step S321, and step S331 are included.
Step S311, determine whether the personnel density is greater than or equal to the first threshold (e.g., 0.2), if so, execute step S312.
And step S312, controlling the air conditioner to execute a low-load frost-inhibiting operation mode.
For example, when the load in the current room is calculated, the first load and the second load are calculated, respectively. When the air conditioner is a fresh air conditionerAnd adjusting the device, and calculating a third load under the condition that the fresh air system is started. First load according to equation Q1Q S calculation; wherein Q is1Is the first load, q is the unit area load, and is 150-180W/m2The minimum value of (a) is 150W/m2. Second load according to formula Q2＝Φ*n*q2Calculating; wherein Q is2For the second load, n is the number of people in the room, q2For sensible heat, e.g., 85W, Φ is the clustering coefficient, e.g., 0.89. Third load according to formula Q3Calculating the value Z Cm | Ts-To | rho; wherein Z is fresh air volume, Cm is fresh air specific heat capacity (1.005 kJ/(kg x DEG C)), Ts is set temperature, To is outdoor temperature, rho is fresh air density (1.29-1.16, kg/m3), rho can be any one preset in 1.29-1.16, or any one of 1.29-1.16 can be selected according To outdoor temperature, if the mapping relation of a plurality of fresh air densities and outdoor temperature ranges is stored, the corresponding fresh air density is searched from the mapping relation according To the outdoor temperature. The current indoor load is according to the formula Q ═ Q1+Q2+Q3Calculating; wherein Q is an indoor load. And after the indoor load is determined, controlling the air conditioner to operate according to corresponding operation parameters, wherein if the indoor load is larger, the operation frequency of a compressor of the air conditioner is higher, the opening of a throttle valve is larger, and the rotating speeds of an indoor fan and an outdoor fan are larger.
The fresh air volume is determined according to the following mode:
according to formula Z1＝V*nxCalculating a first new air volume; wherein Z is1Is the first fresh air volume, V is the indoor volume, nxThe number of air changes (2 times/hour, the minimum value of 2-6 times/hour). The controller may calculate the indoor volume according to the length, width and height of the indoor space detected by the space size detecting device, or may directly input the indoor volume by an installer when the air conditioner is installed.
According to formula Z2＝n*q1And calculating the second fresh air volume. Wherein Z is2The second fresh air volume, n the number of people in the room, q1The fresh air quantity required by a single person is 30-40 m3Minimum value of/h, i.e. 30m3/h)。
Comparison Z1And Z2The smaller of the two is set as the fresh air volume Z.
It should be noted that when the indoor load is calculated in the normal operation process of the air conditioner, the load q per unit area is 150-180W/m2Medium or large values of, e.g., 165W/m2、170W/m2Or other values, etc., the number of air changes nxTaking the fresh air quantity q needed by a single person for 3 times/hour, 4 times/hour, 5 times/hour or 6 times/hour1Take 32m3/h、34m3H or 37m3H, etc. In addition, the air conditioner is controlled to execute the low-load frost-inhibiting operation mode, so that the compressor of the air conditioner can be operated at a lower frequency, and the outdoor fan and the indoor fan rotate at a low speed.
Step S321, determining whether the personnel density is greater than or equal to a second threshold (e.g., 0.1) and less than the first threshold, if so, performing step S322.
And step S322, judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet a first defrosting condition, and if so, executing step S323. If the first defrosting condition is that Te is less than or equal To minus 5 ℃ and 10 ℃ is less than or equal To is less than or equal To 20 ℃.
And step S323, controlling the air conditioner to execute a first defrosting operation mode.
Step S331, determining whether the personnel density is less than a second threshold, if yes, executing step S332.
And S332, judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet second defrosting conditions, and if so, executing the step S333. If the second defrosting condition is Te less than or equal To-7 ℃ and To less than or equal To 2 ℃.
And step S333, controlling the air conditioner to execute a second defrosting operation mode.
Wherein the defrost intensity of the first defrost mode of operation is less than the defrost intensity of the second defrost mode of operation. Specifically, the first defrosting operation mode is that the fresh air system is closed, the four-way valve is reversed to perform reverse circulation defrosting, the indoor fan is closed, and the first defrosting operation mode is exited when Te is more than or equal to 25 ℃ for 1min or Te is more than or equal to 30 ℃ for 0.5min or defrosting time reaches 4 min. The second defrosting operation mode is that the fresh air system is closed, the four-way valve is reversed to perform reverse circulation defrosting, the indoor fan is closed, and the first defrosting operation mode is quitted when the defrosting time reaches 10 min. When the temperature needs to be described, the numerical value of the judgment condition for quitting the defrosting operation can be adjusted according to the actual situation, such as Te is more than or equal to 20 ℃, or Te is more than or equal to 33 ℃, and the like. In addition, the specific determination temperature values of the first defrosting condition and the second defrosting condition can be adjusted according To actual conditions, such as that the first defrosting condition is Te less than or equal To-4 ℃ and 8 ℃ less than or equal To less than or equal To 16 ℃, the second defrosting condition is Te less than or equal To-8 ℃ and To less than or equal To 0 ℃, or other suitable conditions are set.
In addition, the first defrosting operation mode can be set to defrost through the bypass pipeline, the second defrosting operation mode can be set to reverse cycle defrosting, and the defrosting operation time is the same.
The air conditioner is controlled to execute a low-load frost suppression operation mode under the condition that the personnel density is larger than or equal to the first threshold value, namely the air conditioner is controlled to operate under the condition that the indoor personnel density is large and frosting is easy to occur, so that the frosting of an outdoor heat exchanger of the air conditioner can be delayed, and the indoor comfort level can be guaranteed. The air conditioner is controlled To execute the first defrosting operation mode under the condition that the personnel density is larger than or equal To the second threshold value and smaller than the first threshold value, the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet the first defrosting condition, low-intensity defrosting can be carried out on the outdoor heat exchanger under the condition that the outdoor heat exchanger of the air conditioner is slightly frosted under the condition that the number of indoor people is not too many, the influence of frosting on the heat exchange performance of the outdoor heat exchanger can be reduced, and the comfort degree of users can be prevented from being seriously influenced. The air conditioner is controlled to execute the second defrosting operation mode under the condition that the personnel density is smaller than the second threshold value, high-intensity defrosting is carried out on the outdoor heat exchanger under the conditions that indoor personnel are fewer and frosting is serious, defrosting can be carried out quickly, the heat exchange effect of the outdoor heat exchanger is avoided being seriously influenced by a thicker frost layer, and meanwhile, the influence of indoor temperature reduction on comfort level caused by quick defrosting is reduced.
It should be noted that the first threshold of 0.2 and the second threshold of 0.1 are only a specific setting, and may be adjusted in practical applications, for example, the first threshold and the second threshold are 0.3 and 0.15, respectively, the first threshold and the second threshold are 0.25 and 0.08, respectively, or other suitable combinations, etc. In addition, step S311, step S321, and step S331 may be executed synchronously, or may be executed according to different orders, as long as after step S220.
A control method of an air conditioner according to a second embodiment of the present invention will be described with reference to fig. 3. Fig. 3 is a flowchart illustrating a control method of an air conditioner according to a second embodiment of the present invention.
As shown in fig. 3, in a second embodiment, a control method of an air conditioner includes:
and S100, acquiring the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger.
Step S210, judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet the following conditions: to is less than or equal To the first preset temperature, Te is less than or equal To the second preset temperature, and To and Te are in decreasing trend, if yes, the step S220 is executed, and if not, the step S100 is returned To.
And S220, acquiring the indoor personnel density.
After step S220, step S311, step S321, and step S331 are included.
Step S311, determine whether the personnel density is greater than or equal to the first threshold (e.g., 0.2), if so, execute step S312.
And step S312, controlling the air conditioner to execute a low-load frost-inhibiting operation mode. After step S312, the process proceeds to step S322.
Step S321, determining whether the personnel density is greater than or equal to a second threshold (e.g., 0.1) and less than the first threshold, if so, performing step S322.
And step S322, judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet a first defrosting condition, if so, executing step S323, and if not, executing step S332. If the first defrosting condition is that Te is less than or equal To minus 5 ℃ and 10 ℃ is less than or equal To is less than or equal To 20 ℃.
And step S323, controlling the air conditioner to execute a first defrosting operation mode.
Step S331, determining whether the personnel density is less than a second threshold, if yes, executing step S332.
And S332, judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet second defrosting conditions, and if so, executing the step S333. If the second defrosting condition is Te less than or equal To-7 ℃ and To less than or equal To 2 ℃.
And step S333, controlling the air conditioner to execute a second defrosting operation mode.
It should be noted that "after step S312, the process goes To step S322" may be performed when step S312 is started or not finished, that is, whether the outdoor ambient temperature To and the temperature Te of the outdoor heat exchanger satisfy the first defrosting condition is determined during the process of step S312, or may be performed after step S312 is finished To step S322. Preferably, it jumps to step S322 when the set time period (e.g., 20min) is executed at step S312, so that the weak-intensity defrosting can be executed if the outdoor heat exchanger is frosted slightly after the low-load defrosting operation mode is operated for the set time period.
And under the condition that the personnel density is greater than or equal To the first threshold value and the air conditioner is controlled To execute the low-load defrosting operation mode, further judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet a first defrosting condition. Controlling the air conditioner To execute a first defrosting operation mode when the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet first defrosting conditions; and when the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger do not meet the first defrosting condition, further judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet a second defrosting condition, and controlling the air conditioner To execute a second defrosting operation mode when the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet the second defrosting condition. Therefore, in the low-load operation frost suppression process, if the outdoor heat exchanger is detected to be slightly frosted, the air conditioner is controlled to perform weak-strength defrosting at the moment, the influence of frosting on the heat exchange performance of the outdoor heat exchanger can be further avoided, and the working efficiency of the air conditioner is improved. And under the condition that the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger do not meet the first defrosting condition, further judging whether the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet a second defrosting condition, controlling the air conditioner To execute a second defrosting operation mode when the outdoor environment temperature To and the temperature Te of the outdoor heat exchanger meet the second defrosting condition, and carrying out high-intensity defrosting on the outdoor heat exchanger under the conditions that the personnel density is greater than or equal To a second threshold value and is less than the first threshold value and the frosting is serious, so that the faults of shutdown and the like of the air conditioner caused by the serious frosting of the outdoor heat exchanger are avoided.
In another possible embodiment, unlike the second embodiment, in the case where the outdoor ambient temperature To and the temperature Te of the outdoor heat exchanger do not satisfy the first defrosting condition, the process returns directly To step S100.
In another aspect, the present invention also provides an air conditioner, including: the air conditioner control device comprises a memory, a processor and a computer program, wherein the computer program is stored in the memory and is configured to be executed by the processor to realize the control method of the air conditioner of any one embodiment. The memory and the processor are arranged on the controller.
It should be noted that the memory in the above embodiments includes, but is not limited to, a random access memory, a flash memory, a read only memory, a programmable read only memory, a volatile memory, a non-volatile memory, a serial memory, a parallel memory, or a register, and the like, and the processor includes, but is not limited to, a CPLD/FPGA, a DSP, an ARM processor, a MIPS processor, and the like.
As can be seen from the above description, in the technical solution of the present invention, under the condition that the outdoor heat exchanger of the air conditioner is easily frosted, the density of indoor personnel is obtained and the defrosting operation mode is selectively executed according to the density of the personnel, so that not only can the influence of the defrosting operation on the indoor temperature be reduced and the comfort level of the indoor environment be ensured, but also the time of the frost layer on the outdoor heat exchanger can be reduced as much as possible, thereby reducing the influence of frosting on the heat exchange performance of the outdoor heat exchanger and improving the efficiency of the air conditioner.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims of the present invention, any of the claimed embodiments may be used in any combination.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of an air conditioner, characterized in that the control method comprises:
acquiring the temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger;
when To is less than or equal To a first preset temperature, Te is less than or equal To a second preset temperature, and To and Te are in a decreasing trend, acquiring the indoor personnel density;
controlling the air conditioner to selectively execute a defrosting operation mode according to the personnel density;
the defrosting operation mode comprises a low-load defrosting operation mode, a first defrosting operation mode and a second defrosting operation mode, wherein the first preset temperature ranges from 18 ℃ to 22 ℃, the second preset temperature ranges from-5 ℃ to 0 ℃, the defrosting operation mode comprises a low-load defrosting operation mode, the first defrosting operation mode and the second defrosting operation mode, and the defrosting intensity of the first defrosting operation mode is smaller than that of the second defrosting operation mode.
2. The control method as set forth in claim 1, wherein the step of controlling the air conditioner to selectively perform a defrosting operation mode according to the person density includes:
and if the personnel density is larger than or equal to the first threshold value, controlling the air conditioner to execute the low-load frost-inhibiting operation mode.
3. The control method according to claim 2, wherein the step of controlling the air conditioner to selectively perform a defrosting operation mode according to the person density further comprises:
if the second threshold value is not more than the personnel density and is less than the first threshold value, judging whether To and Te meet a first defrosting condition;
and controlling the air conditioner to selectively execute the first defrosting operation mode according to the judgment result.
4. The control method according to claim 3, wherein the step of controlling the air conditioner to selectively perform the first defrosting operation mode according to the determination result comprises:
and if To and Te meet the first defrosting condition, controlling the air conditioner To execute the first defrosting operation mode.
5. The control method according to claim 3 or 4, wherein the step of controlling the air conditioner to selectively perform the first defrosting operation mode according to the judgment result comprises:
if To and Te do not meet the first defrosting condition, judging whether To and Te meet a second defrosting condition;
and if To and Te meet the second defrosting condition, controlling the air conditioner To execute the second defrosting operation mode.
6. The control method according to claim 3 or 4, wherein the step of controlling the air conditioner to selectively perform a defrosting operation mode according to the person density further comprises:
if the personnel density is less than a second threshold value, judging whether To and Te meet a second defrosting condition;
and controlling the air conditioner to selectively execute the second defrosting operation mode according to the judgment result.
7. The control method according to claim 6, wherein the step of controlling the air conditioner to selectively perform the second defrosting operation mode according to the judgment result comprises:
if To and Te meet a second defrosting condition, controlling the air conditioner To execute the second defrosting operation mode;
and if To and Te do not meet the second defrosting condition, controlling the air conditioner To normally operate.
8. The control method according to claim 2, wherein after the step of controlling the air conditioner to perform the low load frost suppression operation mode, the control method further comprises:
judging whether the current temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger meet a first defrosting condition or not;
and controlling the air conditioner to selectively execute the first defrosting operation mode according to the judgment result.
9. The control method according To claim 8, wherein the step of "judging whether the current temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger satisfy the first defrosting condition" includes:
and after the air conditioner executes the low-load defrosting operation mode for a set time, judging whether the current temperature To of the outdoor environment and the temperature Te of the outdoor heat exchanger meet a first defrosting condition.
10. An air conditioner, comprising:
a memory;
a processor; and
a computer program stored in the memory and configured to be executed by the processor to implement the control method of the air conditioner of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482374.1A CN113137709B (en) | 2021-04-30 | 2021-04-30 | Air conditioner and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482374.1A CN113137709B (en) | 2021-04-30 | 2021-04-30 | Air conditioner and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113137709A true CN113137709A (en) | 2021-07-20 |
| CN113137709B CN113137709B (en) | 2023-05-26 |
Family
ID=76816607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110482374.1A Active CN113137709B (en) | 2021-04-30 | 2021-04-30 | Air conditioner and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113137709B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003314931A (en) * | 2002-02-21 | 2003-11-06 | Saginomiya Seisakusho Inc | Air conditioner |
| CN102116549A (en) * | 2011-03-15 | 2011-07-06 | 宁波奥克斯电气有限公司 | Method for defrosting of direct current variable frequency heat pump air conditioner |
| CN102226608A (en) * | 2011-04-27 | 2011-10-26 | 海尔集团公司 | Air conditioner defrosting system, air conditioner and air conditioner defrosting method |
| CN102466296A (en) * | 2010-11-10 | 2012-05-23 | 珠海格力电器股份有限公司 | Defrosting control method applied to heat pump air conditioning unit |
| CN104832989A (en) * | 2015-04-29 | 2015-08-12 | 广东美的制冷设备有限公司 | Air conditioner and control method for air conditioner |
| JP2015183898A (en) * | 2014-03-24 | 2015-10-22 | 日立アプライアンス株式会社 | air conditioner |
| CN105890114A (en) * | 2016-04-12 | 2016-08-24 | 青岛海尔空调电子有限公司 | Control method and device for outdoor unit defrosting |
| WO2019029233A1 (en) * | 2017-08-08 | 2019-02-14 | 格力电器（武汉）有限公司 | Air conditioning system and air conditioner having the same |
| CN111174372A (en) * | 2019-12-31 | 2020-05-19 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN112665117A (en) * | 2019-10-16 | 2021-04-16 | 广东美的制冷设备有限公司 | Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium |
-
2021
- 2021-04-30 CN CN202110482374.1A patent/CN113137709B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003314931A (en) * | 2002-02-21 | 2003-11-06 | Saginomiya Seisakusho Inc | Air conditioner |
| CN102466296A (en) * | 2010-11-10 | 2012-05-23 | 珠海格力电器股份有限公司 | Defrosting control method applied to heat pump air conditioning unit |
| CN102116549A (en) * | 2011-03-15 | 2011-07-06 | 宁波奥克斯电气有限公司 | Method for defrosting of direct current variable frequency heat pump air conditioner |
| CN102226608A (en) * | 2011-04-27 | 2011-10-26 | 海尔集团公司 | Air conditioner defrosting system, air conditioner and air conditioner defrosting method |
| JP2015183898A (en) * | 2014-03-24 | 2015-10-22 | 日立アプライアンス株式会社 | air conditioner |
| CN104832989A (en) * | 2015-04-29 | 2015-08-12 | 广东美的制冷设备有限公司 | Air conditioner and control method for air conditioner |
| CN105890114A (en) * | 2016-04-12 | 2016-08-24 | 青岛海尔空调电子有限公司 | Control method and device for outdoor unit defrosting |
| WO2019029233A1 (en) * | 2017-08-08 | 2019-02-14 | 格力电器（武汉）有限公司 | Air conditioning system and air conditioner having the same |
| CN112665117A (en) * | 2019-10-16 | 2021-04-16 | 广东美的制冷设备有限公司 | Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium |
| CN111174372A (en) * | 2019-12-31 | 2020-05-19 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113137709B (en) | 2023-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108679789B (en) | Control method and device of air conditioning system | |
| CN110513819B (en) | Air conditioner control method, air conditioner and storage medium | |
| JP3137114B1 (en) | Multi-room air conditioner | |
| WO2019223301A1 (en) | Air conditioner control method and control device and air conditioner using the method | |
| CN109751727A (en) | A kind of air conditioning control method, device and air conditioner | |
| CN108548242B (en) | Control method and device of air conditioning system | |
| CN104110768A (en) | Control method and circuit for electronic expansion valve of air conditioner | |
| CN108561980B (en) | Control method and device of air conditioning system | |
| CN108548252B (en) | Control method and device of air conditioning system | |
| CN115095955B (en) | Air conditioner and defrosting control method thereof | |
| CN111964221B (en) | Air conditioner and indoor temperature compensation method of air conditioner | |
| CN110579010A (en) | Control method and control device for electronic expansion valve of multi-split internal machine and air conditioner | |
| CN107120796B (en) | Defrosting control method for air conditioner | |
| CN108561981B (en) | Control method and device of air conditioning system | |
| CN115095954B (en) | Air conditioner and defrosting control method thereof | |
| CN115183400B (en) | Air conditioner and defrosting control method thereof | |
| JP2019184154A (en) | Air conditioner | |
| CN115013912A (en) | Control method and device of fresh air system, storage medium and fresh air system | |
| WO2018190334A1 (en) | Air-conditioning device, control device, air-conditioning method, and program | |
| CN110940031A (en) | Air conditioner control method, kitchen air conditioning system and storage medium | |
| CN108548294B (en) | Control method and device of air conditioning system | |
| CN109237744A (en) | A kind of control method improving air-conditioning heating process stability | |
| CN114061024A (en) | Control method and control device for defrosting of air conditioning system, controller and air conditioning system | |
| JP7191110B2 (en) | Air conditioner, control device, air conditioning method and program | |
| CN113137709A (en) | Air conditioner and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |