CN112665117B - Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium - Google Patents
Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium Download PDFInfo
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- CN112665117B CN112665117B CN201910987596.1A CN201910987596A CN112665117B CN 112665117 B CN112665117 B CN 112665117B CN 201910987596 A CN201910987596 A CN 201910987596A CN 112665117 B CN112665117 B CN 112665117B
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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
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—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
- F24F11/77—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 by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- 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
Abstract
The invention provides a multi-online defrosting method, a multi-online defrosting device, a multi-online air conditioning system and a readable storage medium, wherein the method comprises the following steps: judging the on-off state of the indoor unit, wherein the on-off state comprises the off state; acquiring the capacity capacities of the indoor unit and the outdoor unit after the state is judged, calculating the sum of the capacity capacities of the indoor unit after shutdown, and calculating the ratio of the sum of the capacity capacities to the capacity of the outdoor unit; and controlling the indoor unit to enter a corresponding defrosting mode according to the ratio. According to the invention, the states of the indoor units of the multi-split air-conditioning system can be analyzed, the actual use condition of the multi-split air-conditioning system is represented by the capacity ratio related to the states of the indoor units, and defrosting control is performed according to the actual operation condition, so that the defrosting control can be matched with the actual use condition of the multi-split air-conditioning system, the indoor temperature is kept stable as much as possible while defrosting is performed, and the thermal comfort experience of a user is ensured.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-online defrosting method and device, a multi-online air conditioning system and a readable storage medium.
Background
The multi-split air conditioning system is a refrigeration/heating circulation system formed by connecting at least one outdoor unit and a plurality of indoor units. When the multi-split air conditioning system heats under the low-temperature working condition, the outdoor unit heat exchanger is easy to frost, the heat exchange efficiency is rapidly reduced, the heat exchange effect is seriously influenced, and the multi-split air conditioning system can enter a defrosting mode at the moment for avoiding the continuous reduction of the heating effect. In the traditional defrosting method, refrigerants in all indoor machine heat exchangers are evaporated and absorb heat uniformly, and then the frost layer of the outdoor heat exchanger is melted by using heat released by discharged high-temperature and high-pressure gas; in the process, the actual use condition of each indoor unit is not considered, and each indoor unit performs indifferent refrigeration, so that the indoor temperature can fluctuate seriously, and the thermal comfort experience of a user is influenced.
Disclosure of Invention
The invention mainly aims to provide a multi-online defrosting method and device, a multi-online air conditioning system and a readable storage medium, and aims to solve the technical problem that the serious fluctuation of indoor temperature in the defrosting process of the multi-online air conditioning system influences the thermal comfort experience of a user.
In order to achieve the above object, an embodiment of the present invention provides a multi-online defrosting method applied to a multi-online air conditioning system, where the multi-online air conditioning system includes an outdoor unit and a plurality of indoor units, and the multi-online defrosting method includes:
judging the on-off state of the indoor unit, wherein the on-off state comprises the off state;
acquiring the capacity capacities of the indoor unit and the outdoor unit after the state is judged, calculating the sum of the capacity capacities of the indoor unit after shutdown, and calculating the ratio of the sum of the capacity capacities to the capacity of the outdoor unit;
and controlling the indoor unit to enter a corresponding defrosting mode according to the ratio.
Optionally, the step of controlling the indoor unit to enter the corresponding defrosting mode according to the ratio includes:
comparing the ratio with a preset threshold value;
if the ratio is larger than or equal to the preset threshold, controlling the indoor unit to defrost in a comfortable way;
and if the ratio is smaller than the preset threshold value, controlling the indoor unit to carry out conventional defrosting.
Optionally, the power on/off state further includes power on, and the step of controlling the indoor unit to perform comfort defrosting includes:
controlling an electronic expansion valve of the shutdown indoor unit to be opened, controlling a fan to be opened to operate at a preset rotating speed, controlling an electric auxiliary heating to be opened, and controlling the swing angle to be horizontal;
and controlling the electronic expansion valve and the fan of the started indoor unit to be closed.
Optionally, the step of controlling the indoor unit to perform normal defrosting includes:
and controlling the opening of an electronic expansion valve of the indoor unit and the closing of a fan.
Optionally, the power on/off state further includes power on, and the step of controlling the indoor unit to perform conventional defrosting further includes:
acquiring the temperature stabilization priority of each started indoor unit, and determining a target indoor unit from each started indoor unit according to the temperature stabilization priority;
and controlling the electronic expansion valve of the target indoor unit to be closed and the fan to be closed, and controlling the electronic expansion valves of all the indoor units except the target indoor unit to be opened and the fans to be closed.
Optionally, the step of obtaining the temperature stabilization priority of each started indoor unit includes:
respectively detecting the number of users in a working area corresponding to each started indoor unit through a preset detector;
determining the temperature stability priority of each started indoor unit according to the number of users in the corresponding working area of each started indoor unit; or the like, or, alternatively,
and determining the temperature stability priority of each started indoor unit according to user setting.
Optionally, the multiple on-line frost control method further includes:
monitoring the frosting state of the outdoor unit;
the step of judging the on-off state of the indoor unit comprises the following steps:
and when the frosting of the outdoor unit is judged, the on-off state of the indoor unit is judged.
In addition, to achieve the above object, an embodiment of the present invention further provides a multiple online defrosting apparatus, including:
the state judgment module is used for judging the on-off state of the indoor unit, wherein the on-off state comprises a power-off state;
the ratio calculation module is used for acquiring the capacity capacities of the indoor unit and the outdoor unit after the state judgment, calculating the sum of the capacity capacities of the indoor unit which is shut down, and calculating the ratio of the sum of the capacity capacities to the capacity of the outdoor unit;
and the defrosting control module is used for controlling the indoor unit to enter a corresponding defrosting mode according to the ratio.
In addition, to achieve the above object, embodiments of the present invention further provide a multi-split air conditioning system, which includes a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein when the computer program is executed by the processor, the steps of the multi-split defrosting method as described above are implemented.
In addition, to achieve the above object, an embodiment of the present invention further provides a readable storage medium, where a computer program is stored, where the computer program, when executed by a processor, implements the steps of the multi-split defrosting method as described above.
The multi-online defrosting method, the multi-online defrosting device, the multi-online air conditioning system and the readable storage medium, which are provided by the embodiment of the invention, can analyze the on-off state of each indoor unit of the multi-online air conditioning system, represent the actual use condition of each indoor unit through the capacity ratio related to the on-off state of each indoor unit, and perform defrosting control according to the ratio, so that the defrosting control can be attached to the actual use condition of each indoor unit, the indoor temperature is kept stable as much as possible while defrosting, and the thermal comfort experience of a user is ensured.
Drawings
Fig. 1 is a schematic diagram of a hardware architecture of a multi-split air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the multi-connected defrosting method of the invention;
FIG. 3 is a schematic flow chart of a second embodiment of the multi-connected defrosting method of the invention;
FIG. 4 is a schematic flow chart of a third embodiment of the multi-connected defrosting method of the invention;
fig. 5 is a functional block diagram of a multi-split defrosting apparatus according to a first embodiment of the present invention.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The multi-online defrosting method is mainly applied to a multi-online air conditioning system.
Referring to fig. 1, fig. 1 is a hardware architecture diagram of a multi-split air conditioning system according to an embodiment of the present invention. In this embodiment of the present invention, the multi-split air conditioning system may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the user interface 1003 may include a Display screen (Display), an input unit such as a key (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WI-FI interface, WI-FI interface); the memory 1005 may be a Random Access Memory (RAM) or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to FIG. 1, the memory 1005 of FIG. 1, which is one type of readable storage medium, may include an operating system, a network communication module, and a computer program. In fig. 1, the network communication module may be used to connect to the database, and perform data communication with the database; and the processor 1001 may call a computer program stored in the memory 1005 and perform the multiple on-line defrosting method provided by the embodiment of the present invention.
The embodiment of the invention provides a multi-connected defrosting method.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the multi-on-line defrosting method according to the present invention.
In this embodiment, the multi-online defrosting method is applied to a multi-online air conditioning system, the multi-online air conditioning system includes an outdoor unit and a plurality of indoor units, and the multi-online defrosting method includes the following steps:
step S10, judging the on-off state of the indoor unit;
the multi-split air-conditioning system is a refrigeration/heating circulating system formed by connecting at least one outdoor unit and a plurality of indoor units; in the multi-split air conditioning system, it may be considered that a certain control device performs control, but the control device may be a single device or an abstract function device composed of a plurality of different physical devices. When the existing multi-split air conditioning system is defrosted, all indoor units uniformly evaporate and absorb heat, and then the frost layer of an outdoor heat exchanger is melted by using heat released by discharged high-temperature and high-pressure gas; in the process, the actual use condition of each indoor unit is not considered, and each indoor unit performs indifferent cooling, so that the indoor temperature fluctuation is caused, and the thermal comfort experience of a user is influenced. In contrast, according to the multi-online defrosting method provided by the embodiment, the states of the indoor units of the multi-online air conditioning system are analyzed, the actual use condition of each indoor unit is represented by the capacity-capacity ratio related to the state of each indoor unit, and defrosting control is performed according to the actual operation condition, so that the defrosting control can be attached to the actual use condition of each indoor unit, the indoor temperature is kept stable as much as possible while defrosting, and the thermal comfort experience of a user is ensured.
When defrosting is performed in the multi-split air conditioning system of the embodiment, the on-off states of the indoor units are firstly determined respectively, wherein the on-off states of the indoor units include an off state and an on state (alternative). The shutdown state refers to the current shutdown of the indoor unit; the power-on state refers to the current power-on of the indoor unit.
Step S20, acquiring the capacity of the indoor unit and the outdoor unit after the state is judged, calculating the sum of the capacity of the indoor unit after shutdown, and calculating the ratio of the sum of the capacity to the capacity of the outdoor unit;
in this embodiment, when the on-off state of each indoor unit is determined, the actual use condition of the multi-split air-conditioning system needs to be analyzed according to the on-off state of each indoor unit, and the actual use condition can be represented by parameters related to the capacity of the indoor unit and the capacity of the outdoor unit. Specifically, first, the capacity of each indoor unit and the capacity of the outdoor unit can be obtained respectively; secondly, determining all indoor units which are in a power-off state in a power-on and power-off state, adding the capacity capacities of all indoor units in the power-off state, and calculating the sum of the capacity capacities of the indoor units in the power-off state; when the capacity sum is obtained, the ratio of the capacity sum to the capacity of the outdoor unit can be calculated, and the ratio can be used for representing the actual use condition of the indoor unit of the multi-split air-conditioning system. The larger the ratio is, the more the indoor units are turned off, the larger the capacity specific gravity of the turned-off indoor units is; when the specific gravity is high to a certain degree, the defrosting operation can be finished only by the indoor unit which is turned off.
For example, the multi-split air conditioning system includes 5 indoor units a, b, c, d, and e, wherein the indoor unit in shutdown state includes three indoor units a, b, and c, and the corresponding capacity capacities thereof are respectively denoted as Ea, Eb, and Ec; the outdoor unit comprises h units, and the capacity corresponding to the h units is Eh; the sum of the capacity of the indoor units in the shutdown state E1, that is, E1 is equal to Ea + Eb + Ec, and then the ratio X between the sum of the capacity of the indoor units E1 and the capacity of the outdoor units Eh is equal to E1/Eh, so as to represent the actual use condition of the multi-split air conditioning system.
And step S30, controlling the indoor unit to enter a corresponding defrosting mode according to the ratio.
In this embodiment, a plurality of different defrosting modes can be preset, and for the different defrosting modes, the defrosting treatment to be adopted by the indoor unit can be different; in the same defrosting mode, different indoor units can also adopt different defrosting treatments, for example, in the same defrosting mode, some indoor units can open the expansion valve, and some indoor units can not open the expansion valve. When the ratio of the sum of the capacity (of the indoor units in the shutdown state) to the capacity of the outdoor unit is obtained, the actual use condition of the multi-split air-conditioning system can be roughly determined according to the ratio, then the indoor units are controlled to enter the corresponding defrosting modes according to the ratio, a certain number of indoor units can be controlled to carry out defrosting treatment according to the use condition of the current indoor units, the defrosting capacity and efficiency are ensured in the defrosting process, the heating efficiency of the indoor units (with people when the multi-split air-conditioning system is started) used by a user is ensured as much as possible, and therefore the defrosting process can be attached to the actual use condition of the multi-split air-conditioning system.
Further, when defrosting is completed, each indoor unit can exit the defrosting mode and restore the original working state, for example, enter a heating mode, and the like, and the working settings of each component, such as a fan, an expansion valve, and the like, can be adjusted accordingly.
In this embodiment, by determining the on-off state of the indoor unit, the on-off state includes shutdown; acquiring the capacity capacities of the indoor unit and the outdoor unit after the state is judged, calculating the sum of the capacity capacities of the indoor unit after shutdown, and calculating the ratio of the sum of the capacity capacities to the capacity of the outdoor unit; and controlling the indoor unit to enter a corresponding defrosting mode according to the ratio. Through the mode, the on-off state of each indoor unit of the multi-split air-conditioning system is analyzed, the actual use condition of each indoor unit is represented through the capacity ratio relevant to the on-off state of each indoor unit, and defrosting control is performed according to the ratio, so that the defrosting control can be attached to the actual use condition of each indoor unit of the multi-split air-conditioning system, the indoor temperature is kept stable as much as possible while defrosting, and the thermal comfort experience of a user is guaranteed.
Based on the embodiment shown in fig. 2, a second embodiment of the multiple defrosting method according to the present invention is provided.
Referring to fig. 3, fig. 3 is a schematic flow chart of a multi-on-line defrosting method according to a second embodiment of the present invention.
In this embodiment, the step S30 includes:
step S31, comparing the ratio with a preset threshold value;
in this embodiment, two different defrosting modes, namely comfort defrosting and conventional defrosting, may be preset; the comfortable defrosting mainly comprises defrosting through an indoor unit in a power-off state (or defrosting through an indoor unit which is not used by people), and ensuring the heating capacity of the indoor unit in a power-on state (or ensuring the heating capacity of the indoor unit which is used by people); and the conventional defrosting is performed by using as many indoor units as possible. Specifically, a preset threshold may be preset, and then the ratio obtained in step S20 is compared with the preset threshold; and determining whether the number of the indoor units which are not used by people is enough or not according to the size relationship of the indoor units and the outdoor unit, and then entering a corresponding defrosting mode.
Step S32, if the ratio is larger than or equal to the preset threshold, controlling the indoor unit to defrost in comfort;
in this embodiment, if the ratio obtained in step S20 is greater than or equal to the preset threshold, it may be considered that the number of indoor units currently not used by one is sufficient, and the defrosting operation may be completed only by the indoor unit that is turned off; at the moment, each indoor unit can be controlled to carry out comfort defrosting, wherein the comfort defrosting is mainly carried out by the indoor unit in a power-off state, and the heating capacity of the indoor unit in the power-on state is ensured.
Further, the power on/off state further includes power on, and the step of controlling the indoor unit to perform comfort defrosting includes:
controlling an electronic expansion valve of the shutdown indoor unit to be opened, controlling a fan to be opened to operate at a preset rotating speed, controlling an electric auxiliary heating to be opened, and controlling the swing angle to be horizontal;
and controlling the electronic expansion valve and the fan of the started indoor unit to be closed.
In this embodiment, when comfort defrosting is performed, defrosting is mainly performed by the indoor unit in the power-off state. At the moment, the opening of an electronic expansion valve of the indoor unit in a shutdown state, the opening of a fan to operate at a preset rotating speed, the opening of electric auxiliary heating and the level of a swing angle can be controlled, and the electronic expansion valve and the fan of the started indoor unit are controlled to be closed, so that the heating capacity of the indoor unit (in a startup state) used by people is ensured as much as possible while defrosting is carried out. Of course, the electronic expansion valve of the indoor unit which is shut down can be set to have a larger opening degree so as to improve the defrosting speed.
And step S33, if the ratio is smaller than the preset threshold, controlling the indoor unit to carry out conventional defrosting.
In this embodiment, if the ratio obtained in step S20 is smaller than the preset threshold, it may be determined that the number of currently turned-off indoor units is small (or that many indoor units are in the on state), at this time, in order to ensure the defrosting speed, defrosting needs to be performed through the turned-on indoor units in addition to the turned-off indoor units, and the defrosting mode at this time may be called conventional defrosting, that is, defrosting is performed through as many indoor units as possible.
Further, the step of controlling the indoor unit to perform conventional defrosting includes:
and controlling the opening of an electronic expansion valve of the indoor unit and the closing of a fan.
In the embodiment, when the conventional defrosting is performed, the aim is to perform the defrosting through as many indoor units as possible; at this time, the electronic expansion valves of all the indoor units (including a shutdown state, an unattended startup state and a manned startup state) can be controlled to open, so that defrosting is performed through all the indoor units, the defrosting speed is increased, and the defrosting time is shortened. When the electronic expansion valves of all the indoor units are controlled to be opened, the fans of all the indoor units are controlled to be closed to avoid large fluctuation of indoor temperature; further, the opening degree of the electronic expansion valve may be set small, or the like. Of course, the opening degree of the electronic expansion valve of the indoor unit in different opening and closing states may be different, for example, the opening degree of the electronic expansion valve of the indoor unit in the off state is larger, and the opening degree of the electronic expansion valve of the indoor unit in the on state is smaller. Through the mode, all indoor units can be controlled to carry out defrosting treatment, so that the defrosting speed is ensured.
Further, the power on/off state further includes power on, and the step of controlling the indoor unit to perform conventional defrosting further includes:
acquiring the temperature stabilization priority of each started indoor unit, and determining a target indoor unit from each started indoor unit according to the temperature stabilization priority;
and controlling the electronic expansion valve of the target indoor unit to be closed and the fan to be closed, and controlling the electronic expansion valves of all the indoor units except the target indoor unit to be opened and the fans to be closed.
In this embodiment, for a plurality of indoor units in a powered-on state, the temperature stabilization priorities corresponding to the working areas may be different, for example, the temperature stabilization priorities include a high temperature stabilization priority and a low temperature stabilization priority (only one temperature stabilization priority is provided for one powered-on indoor unit at the same time), and the higher the temperature stabilization priority of the indoor unit is, the higher the heating capability of the indoor unit is to be guaranteed in defrosting; of course, in order to ensure the defrosting capability, the number of the indoor units of high priority may be limited, for example, the priority of temperature stabilization of 2 on-board indoor units is set to high at most. Specifically, during conventional defrosting, the temperature stabilization priority of each started indoor unit is firstly acquired, and a target indoor unit is determined from each started indoor unit according to the temperature stabilization priority of each started indoor unit, wherein the target indoor unit is also an indoor unit needing to be preferentially ensured to heating capacity; when the target indoor unit is determined, only the electronic expansion valve of the target indoor unit is controlled to be closed and the fan of the target indoor unit is controlled to be closed, and for all indoor units (including starting and shutdown) except the target indoor unit, the electronic expansion valve of the controller is controlled to be opened and the fan of the controller is controlled to be closed. Through the mode, the defrosting is carried out through as many indoor units as possible, the defrosting speed is improved, the heating efficiency of a small number of started indoor units can be guaranteed, and the thermal comfort experience of a user is guaranteed.
Still further, the priority for temperature stabilization may be determined in a variety of ways. Specifically, the step of obtaining the temperature stability priority of each started indoor unit includes:
respectively detecting the number of users in a working area corresponding to each started indoor unit through a preset detector;
determining the temperature stability priority of each started indoor unit according to the number of users in the corresponding working area of each started indoor unit; or the like, or, alternatively,
and determining the temperature stability priority of each started indoor unit according to user setting.
In this embodiment, each indoor unit may be preset with a detector (or externally connected with an independent detector), and then the number of users in the working area corresponding to the started indoor unit is detected by the detector, although the type and specific detection details of the detector may be set according to actual conditions. For example, each indoor unit is provided with a camera, a room image in a room where the started indoor unit is installed can be acquired through the camera, then, user identification is performed on the room image through a certain user identification algorithm (model), and the number of users in the room is determined according to an identification result. For another example, each indoor unit is provided with an infrared imaging device, and the infrared imaging device can acquire an infrared image of a room in which the started indoor unit is installed, and then perform user identification on the infrared image to determine the number of users in the room. When the number of users in the working area corresponding to each started indoor unit is determined, the temperature stability priority of the started indoor units can be determined according to the number of users, that is, a plurality of areas with the largest number of users (the specific number can be set according to actual conditions) are determined, and the temperature stability priority of the started indoor units corresponding to the working areas is high.
Of course, the temperature stabilization priority of each turned-on indoor unit can also be defined and set by the user. Specifically, when a user starts a certain indoor unit through a controller (a remote controller or a mobile terminal with control authority), the temperature stabilization priority of the indoor unit can be set together, or the temperature stabilization priority of the certain indoor unit is changed in the running process; and the multi-split air conditioning system determines the temperature stabilization priority of each started indoor unit according to the user setting.
It is to be noted that, as described above, the number of the high-priority indoor units may have a certain upper limit (for example, two). When a user wants to adjust a certain indoor unit with a low priority to a high priority or the user starts a demanded indoor unit and wants to set the demanded indoor unit to the high priority, the controller can be operated to trigger a priority adjustment instruction. When receiving the priority adjustment instruction, the multi-split air conditioning system detects whether the number of the current high-priority (started) indoor units reaches a preset upper limit; if the temperature does not reach the preset upper limit, the temperature stabilization priority of the required indoor unit can be directly set as a high priority; if the number of the indoor units reaches the preset upper limit, a corresponding invalid prompt can be returned to the controller to prompt the user that the number of the indoor units with the current high priority (starting up) reaches the preset upper limit, the indoor unit with the demand cannot be set to be the high priority, and the indoor unit with the demand is set to be the low priority. When an invalid prompt is returned to the controller, the invalid prompt can also comprise inquiry information of whether to adjust (exchange) the temperature stabilization priorities of other indoor units, if the user selects yes, the current started indoor unit with a certain high priority can be adjusted to be in a low priority, and then the required indoor unit is set to be in a high priority; when the user selects yes, the controller can also display the identification of the current high-priority (starting) indoor unit or the working area where the indoor unit is located, so that the user can select the indoor unit needing to be adjusted.
Based on the embodiment shown in fig. 2 or fig. 3, a third embodiment of the multiple on-line frost organizing method of the present invention is provided.
Referring to fig. 4, fig. 4 is a schematic flow chart of a multiple on-line defrosting method according to a third embodiment of the invention.
In this embodiment, the multiple on-line defrosting control method further includes:
step S40, monitoring a frosting state of the outdoor unit;
in this embodiment, the multi-split air conditioning system may monitor the frosting state of the outdoor unit in various ways to determine whether the outdoor unit is frosted. Specifically, a temperature sensor may be disposed at the outdoor unit, and when the temperature of the outdoor unit is lower than a certain temperature threshold and the duration of the temperature continuously lower than the temperature threshold is longer than a preset duration, it may be determined that the outdoor unit is frosted. Or, a camera may be disposed at the outdoor unit, an outdoor unit image at the outdoor unit may be obtained through the camera, and then the frosting recognition of the outdoor unit image is performed through a related recognition algorithm or model, and whether the outdoor unit is frosted or not is determined according to the recognition result. Of course, whether the outdoor unit is frosted or not may be known in other ways besides the above example.
The step S10 includes:
and step S11, when the outdoor unit is judged to be frosted, judging the on-off state of the indoor unit.
In this embodiment, when it is determined that the outdoor unit is frosted, the step of determining the on/off state of the indoor units may be performed, and then the subsequent defrosting process may be performed according to the state of each indoor unit.
Through the mode, the frosting state of the outdoor unit can be detected, and the step of judging the on-off state of the indoor unit is executed when the outdoor unit is frosted, so that the frosting state of the outdoor unit can be found in time and frosting treatment is carried out, and normal operation of the multi-split system is ensured.
In addition, the embodiment of the invention also provides a multi-connected defrosting device.
Referring to fig. 5, fig. 5 is a functional module schematic diagram of a multi-split air conditioner according to a first embodiment of the present invention.
In this embodiment, the multi-split air conditioner defrosting apparatus includes:
the state judgment module 10 is used for judging the on-off state of the indoor unit, wherein the on-off state comprises a shutdown state;
a ratio calculation module 20, configured to obtain capacity capacities of the indoor unit and the outdoor unit after the state is determined, calculate a sum of capacity capacities of the indoor units that are turned off, and calculate a ratio between the sum of capacity capacities and the capacity of the outdoor unit;
and the defrosting control module 30 is used for controlling the indoor unit to enter a corresponding defrosting mode according to the ratio.
Each virtual function module of the multi-split air conditioning system shown in fig. 1 is stored in a memory 1005 of the multi-split air conditioning system, and is used for implementing all functions of multi-split air conditioning system defrosting; when executed by the processor 1001, the modules may perform a multi-split defrosting function.
Further, the defrosting control module 30 includes:
the size comparison unit is used for comparing the ratio with a preset threshold value;
the first defrosting unit is used for controlling the indoor unit to carry out comfort defrosting if the ratio is greater than or equal to the preset threshold;
and the second defrosting unit is used for controlling the indoor unit to carry out conventional defrosting if the ratio is smaller than the preset threshold value.
The startup and shutdown state further comprises startup, and the first defrosting unit is specifically used for controlling the opening of an electronic expansion valve of the shutdown indoor unit, the opening of a fan to operate at a preset rotating speed, the opening of electric auxiliary heating and the level of a swing angle; and controlling the electronic expansion valve and the fan of the started indoor unit to be closed.
Further, the second defrosting unit is specifically configured to control an electronic expansion valve of the indoor unit to be opened and a fan to be closed.
Further, the on-off state further includes a startup state, and the second defrosting unit is further specifically configured to obtain a temperature stabilization priority of each started indoor unit, and determine a target indoor unit from each started indoor unit according to the temperature stabilization priority; and controlling the electronic expansion valve of the target indoor unit to be closed and the fan to be closed, and controlling the electronic expansion valves of all indoor units except the target indoor unit to be opened and the fans to be closed.
Further, the second defrosting unit further includes:
the priority determining subunit is used for respectively detecting the number of users in the working area corresponding to each started indoor unit through a preset detector; determining the temperature stability priority of each started indoor unit according to the number of users in the corresponding working area of each started indoor unit; or the like, or, alternatively,
and the temperature stabilizing priority of each started indoor unit is determined according to user setting.
Further, the multi-connected defrosting device further comprises:
the state monitoring module is used for monitoring the frosting state of the outdoor unit;
the state judgment module 10 is further configured to judge an on/off state of the indoor unit when it is judged that the outdoor unit is frosted.
The function implementation of each module of the multi-online defrosting device corresponds to each step in the embodiment of the multi-online defrosting method, and the function and implementation process are not described in detail herein.
In addition, the embodiment of the invention also provides a readable storage medium.
The readable storage medium of the present invention stores thereon a computer program, wherein the computer program, when executed by a processor, implements the steps of the multi-split defrosting method as described above.
The method implemented when the computer program is executed may refer to various embodiments of the multiple-online defrosting method of the present invention, and details are not described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or system in which the element is included.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The multi-online defrosting method is applied to a multi-online air conditioning system, the multi-online air conditioning system comprises an outdoor unit and a plurality of indoor units, and the multi-online defrosting method comprises the following steps:
judging the on-off state of the indoor unit, wherein the on-off state comprises the off state;
acquiring the capacity capacities of the indoor unit and the outdoor unit after the state is judged, calculating the sum of the capacity capacities of the indoor unit after shutdown, and calculating the ratio of the sum of the capacity capacities to the capacity of the outdoor unit;
controlling the indoor unit to enter a corresponding defrosting mode according to the ratio;
wherein, the step of controlling the indoor unit to enter the corresponding defrosting mode according to the ratio comprises the following steps:
comparing the ratio with a preset threshold value;
if the ratio is larger than or equal to the preset threshold, controlling the indoor unit to defrost in a comfortable way;
the on-off state further comprises the on state, and the step of controlling the indoor unit to perform comfortable defrosting comprises the following steps:
defrosting is carried out through an indoor unit in a power-off state;
controlling an electronic expansion valve and a fan of the started indoor unit to be closed;
if the ratio is smaller than the preset threshold value, controlling the indoor unit to carry out conventional defrosting;
the step of controlling the indoor unit to perform conventional defrosting comprises the following steps:
controlling an electronic expansion valve of the indoor unit to be opened and a fan to be closed;
the opening degrees of the electronic expansion valves corresponding to the indoor units in different on-off states are different, the opening degree of the electronic expansion valve of the indoor unit in the off state is larger, and the opening degree of the electronic expansion valve of the indoor unit in the on state is smaller.
2. The multi-on-line defrosting method as set forth in claim 1, wherein the defrosting through the indoor unit in the off state comprises:
and controlling the opening of an electronic expansion valve and the opening of a fan of the shutdown indoor unit to operate at a preset rotating speed, and controlling the electric auxiliary heating opening and the swing angle level.
3. The multi-on-line defrosting method according to claim 1, wherein the on-off state further comprises an on state, and the step of controlling the indoor unit to perform normal defrosting further comprises the steps of:
acquiring the temperature stabilization priority of each started indoor unit, and determining a target indoor unit from each started indoor unit according to the temperature stabilization priority;
and controlling the electronic expansion valve of the target indoor unit to be closed and the fan to be closed, and controlling the electronic expansion valves of all the indoor units except the target indoor unit to be opened and the fans to be closed.
4. The multiple on-line frost organizing method according to claim 3, wherein the step of acquiring the temperature stabilization priority of each turned-on indoor unit comprises:
respectively detecting the number of users in a working area corresponding to each started indoor unit through a preset detector;
determining the temperature stability priority of each started indoor unit according to the number of users in the corresponding working area of each started indoor unit; or the like, or, alternatively,
and determining the temperature stability priority of each started indoor unit according to user setting.
5. The multi-connected defrosting method according to any one of claims 1 to 4, further comprising:
monitoring the frosting state of the outdoor unit;
the step of judging the on-off state of the indoor unit comprises the following steps:
and when the frosting of the outdoor unit is judged, the on-off state of the indoor unit is judged.
6. A multi-connected defrosting device, characterized in that the multi-connected defrosting device comprises:
the state judging module is used for judging the on-off state of the indoor unit, wherein the on-off state comprises a shutdown state;
the ratio calculation module is used for acquiring the capacity capacities of the indoor unit and the outdoor unit after the state judgment, calculating the sum of the capacity capacities of the indoor unit which is shut down, and calculating the ratio of the sum of the capacity capacities to the capacity of the outdoor unit;
the defrosting control module is used for controlling the indoor unit to enter a corresponding defrosting mode according to the ratio;
wherein, the step of controlling the indoor unit to enter the corresponding defrosting mode according to the ratio comprises the following steps:
comparing the ratio with a preset threshold value;
if the ratio is larger than or equal to the preset threshold, controlling the indoor unit to defrost in a comfortable way;
the on-off state further comprises the on state, and the step of controlling the indoor unit to perform comfortable defrosting comprises the following steps:
defrosting through an indoor unit in a shutdown state;
controlling an electronic expansion valve and a fan of the started indoor unit to be closed;
if the ratio is smaller than the preset threshold value, controlling the indoor unit to carry out conventional defrosting;
the step of controlling the indoor unit to carry out conventional defrosting comprises the following steps:
controlling an electronic expansion valve of an indoor unit to be opened and a fan to be closed;
the opening degrees of the electronic expansion valves corresponding to the indoor units in different on-off states are different, the opening degree of the electronic expansion valve of the indoor unit in the off state is larger, and the opening degree of the electronic expansion valve of the indoor unit in the on state is smaller.
7. A multi-split air conditioning system comprising a processor, a memory, and a computer program stored on the memory and executable by the processor, wherein the computer program, when executed by the processor, implements the steps of the multi-split defrosting method as set forth in any one of claims 1 to 5.
8. A readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the multi-connected frost method of any of claims 1 to 5.
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| CN201910987596.1A CN112665117B (en) | 2019-10-16 | 2019-10-16 | Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium |
| PCT/CN2020/079231 WO2021073034A1 (en) | 2019-10-16 | 2020-03-13 | Vrf defrost method, device, vrf system, and readable storage medium |
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| CN201910987596.1A CN112665117B (en) | 2019-10-16 | 2019-10-16 | Multi-online defrosting method and device, multi-online air conditioning system and readable storage medium |
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| CN113137709B (en) * | 2021-04-30 | 2023-05-26 | 青岛海尔空调电子有限公司 | Air conditioner and control method thereof |
| CN113865067B (en) * | 2021-10-27 | 2022-12-20 | 美的集团武汉暖通设备有限公司 | Multi-split air conditioner, control method thereof and computer readable storage medium |
| CN114216212A (en) * | 2021-12-10 | 2022-03-22 | 珠海格力电器股份有限公司 | Heating and defrosting control method of multi-split air conditioner and multi-split air conditioner |
| CN114413416B (en) * | 2022-01-26 | 2023-04-25 | 宁波奥克斯电气股份有限公司 | Defrosting control method for multi-split air conditioner, storage medium and multi-split air conditioner |
| CN114811854A (en) * | 2022-04-20 | 2022-07-29 | 青岛海尔空调电子有限公司 | Method, device and system for controlling multi-split air conditioning system and storage medium |
| CN114963452B (en) * | 2022-05-31 | 2023-11-14 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting method and device, multi-connected air conditioner system and storage medium |
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