CN112797598A - Indoor unit control method and device of multi-connected air conditioner and air conditioner - Google Patents

Indoor unit control method and device of multi-connected air conditioner and air conditioner Download PDF

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Publication number
CN112797598A
CN112797598A CN202011617137.3A CN202011617137A CN112797598A CN 112797598 A CN112797598 A CN 112797598A CN 202011617137 A CN202011617137 A CN 202011617137A CN 112797598 A CN112797598 A CN 112797598A
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China
Prior art keywords
indoor unit
electronic expansion
air conditioner
target
sequence
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CN202011617137.3A
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Chinese (zh)
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CN112797598B (en
Inventor
邓赛峰
刘敏
刘合心
陈华
宋磊
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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Priority to CN202011617137.3A priority Critical patent/CN112797598B/en
Publication of CN112797598A publication Critical patent/CN112797598A/en
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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
    • 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
    • F24F11/70—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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems

Abstract

The invention discloses a control method and a device for an indoor unit of a multi-connected air conditioner and the air conditioner, wherein the control method for the indoor unit of the multi-connected air conditioner comprises the following steps: acquiring the capacity variation and the number variation of indoor units of the multi-connected air conditioner in a preset period; judging whether each electronic expansion valve corresponding to the indoor unit meets the sequencing control condition or not based on the capacity variation and the number variation; the sequencing control condition is related to the number of target indoor units which are turned on or turned off in a preset period; if so, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each target indoor unit, and controlling the opening and/or closing of the electronic expansion valve corresponding to each target indoor unit based on the opening sequence and/or closing sequence. The invention can slow down the fluctuation degree of the multi-connected air conditioner, improves the running stability of the multi-connected air conditioner and further improves the comfort experience of users.

Description

Indoor unit control method and device of multi-connected air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device for an indoor unit of a multi-connected air conditioner and the air conditioner.
Background
The multi-connected air conditioner is an air conditioning unit with an outdoor unit connected with a plurality of indoor units with different models or different capacities. The indoor units of the multi-connected air conditioner can be distributed in different indoor areas, each indoor unit is provided with an independent electronic expansion valve for refrigerant throttling and flow control, and because the number of the indoor units of the multi-connected air conditioner is large, the situation that a part of the indoor units are closed or opened simultaneously often occurs in use. However, when a plurality of indoor units need to be closed or opened at the same time, the electronic expansion valves of the indoor units are closed or opened at the same time, the condition of unbalanced refrigerant flow occurs, large fluctuation is generated, and the operation of the air conditioning system is unstable.
Disclosure of Invention
In order to solve the problems, the invention provides a control method and device for an indoor unit of a multi-connected air conditioner and the air conditioner, which can slow down the fluctuation degree of the multi-connected air conditioner, improve the running stability of the multi-connected air conditioner and further improve the comfort experience of a user.
According to an embodiment of the present invention, in one aspect, a method for controlling an indoor unit of a multi-split air conditioner is provided, including: acquiring the capacity variation and the number variation of indoor units of the multi-connected air conditioner in a preset period; judging whether each electronic expansion valve corresponding to the indoor unit meets a sequencing control condition or not based on the capacity variation and the number variation; the sequencing control condition is related to the number of target indoor units which are turned on or turned off in a preset period; if so, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each target indoor unit, and controlling the opening and/or closing of the electronic expansion valve corresponding to each target indoor unit based on the opening sequence and/or the closing sequence.
By adopting the technical scheme, the electronic expansion valves which are opened or closed simultaneously are sequentially controlled according to the opening sequence or the closing sequence, the problem of unbalanced refrigerant flow in the pipelines can be avoided to a certain extent, the fluctuation degree of the multi-connected air conditioner is reduced, the running stability of the multi-connected air conditioner is improved, and the comfort experience of users is further improved.
Preferably, the step of obtaining the capacity variation and the number variation of the multiple air-conditioning indoor units in the preset period includes: acquiring an indoor unit starting instruction or an indoor unit shutdown instruction input by a user in a preset period; and determining the capacity variation and the number variation of the multi-connected air conditioners according to the starting instruction or the shutdown instruction.
By adopting the technical scheme, the starting number, the shutdown number and the capacity variation of the indoor units in the preset period can be accurately monitored, an important basis is provided for judging whether the electronic expansion valves need to be controlled in a sequencing mode, and the reliability of indoor unit control of the multi-connected air conditioner is improved.
Preferably, the step of determining whether the multi-type air conditioner satisfies a sorting control condition based on the capacity variation and the number variation includes: determining the capacity change rate of the indoor unit in the preset period based on the capacity change amount; and when the absolute value of the capacity change rate is greater than or equal to a first change rate and the absolute value of the number change amount is greater than or equal to a first number, determining that the multi-connected air conditioner meets the sequencing control condition.
By adopting the technical scheme, whether the multi-connected air conditioner meets the sequencing control condition is judged, the problem that the air conditioner is fluctuated due to the simultaneous action of a plurality of electronic expansion valves when a plurality of indoor units are started or shut down simultaneously can be avoided, and the running stability of the multi-connected air conditioner is improved.
Preferably, the step of determining an opening order and/or a closing order of the electronic expansion valves corresponding to the target indoor units includes: acquiring a current set wind shield, indoor unit capacity and indoor temperature difference of each target indoor unit; the indoor temperature difference is the difference value between the ambient temperature of the target indoor unit and the current set temperature; carrying out priority sequencing on the currently set wind shield, the indoor temperature difference and the indoor unit capacity to obtain a priority sequencing result; and determining the opening sequence and/or the closing sequence of the electronic expansion valve corresponding to each target indoor unit based on the priority ranking result.
By adopting the technical scheme, the opening or closing of the electronic expansion valve is sequenced based on the current set wind shield, the indoor temperature difference and the indoor unit capacity of the indoor unit, the electronic expansion valve can be controlled according to the actual running state of the indoor unit, and the control reliability of the electronic expansion valve of the indoor unit is improved.
Preferably, the priority ranking result sequentially comprises the current set wind level, the indoor temperature difference and the indoor unit capacity; the step of determining the opening order and/or the closing order of the electronic expansion valves corresponding to the target indoor units based on the priority ranking results comprises the following steps: determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each target indoor unit based on the gear level of each current set wind gear; the starting sequence is obtained by sequencing the current set wind gear of each target indoor unit according to the sequence from a high gear to a low gear, and the closing sequence is obtained by sequencing the current set wind gear of each target indoor unit according to the sequence from a low gear to a high gear; when two or more than two second target indoor units exist in the target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each second target indoor unit based on the indoor temperature difference and the indoor unit capacity; and the current set wind gear of each second target indoor unit is the same.
By adopting the technical scheme, the electronic expansion valves are sequentially opened according to the sequence from high to low of the target indoor unit gears, and closed according to the sequence from low to high of the target indoor unit gears, so that the running stability of the multi-connected air conditioner is improved.
Preferably, the step of determining an opening order and/or a closing order of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference and the indoor unit capacity includes: determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference corresponding to the second target indoor units; the opening sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from large to small, and the closing sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from small to large; when two or more than two third target indoor units exist in the second target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each third target indoor unit based on the indoor unit capacity of each third target indoor unit; the indoor temperature difference of each third target indoor unit is the same, the opening sequence of the electronic expansion valve corresponding to each third target indoor unit is obtained by sequencing the indoor unit capacity of each third target indoor unit from small to large, and the closing sequence of the electronic expansion valve corresponding to each third target indoor unit is obtained by sequencing the indoor unit capacity of each third target indoor unit from large to small.
By adopting the technical scheme, when the current set wind gear is the same, the opening sequence and the closing sequence of the electronic expansion valves are sequenced based on the indoor temperature difference, so that the fluctuation of the outlet air temperature of the multi-connected air conditioner is avoided, the electronic expansion valve corresponding to the indoor unit with larger indoor temperature difference is opened preferentially, and the electronic expansion valve corresponding to the indoor unit with smaller indoor temperature difference is closed preferentially, so that the temperature requirement of a user is met, and the comfort experience of the user is improved; the electronic expansion valve corresponding to the indoor unit with smaller capacity is opened preferentially, and the electronic expansion valve corresponding to the indoor unit with larger capacity is closed preferentially, so that the fluctuation of the air conditioning system can be weakened, and the running stability of the multi-connected air conditioner is improved.
Preferably, the indoor unit control method of the multi-split air conditioner further includes: when two or more than two fourth target indoor units exist in the third target indoor units, determining the opening sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the communication address of each fourth target indoor unit; the indoor unit capacity of each fourth target indoor unit is the same; and/or acquiring the running time of each fourth target indoor unit, determining the closing sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the running time, and determining the closing sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the communication address of each fourth target indoor unit when the running times of the fourth target indoor units are the same.
By adopting the technical scheme, the phenomenon that the air conditioning system is unstable due to synchronous actions of the electronic expansion valves of a plurality of indoor units can be avoided, the temperature fluctuation of the coil pipe is reduced, and the air blowing comfort of the air conditioner is improved.
Preferably, the indoor unit control method of the multi-split air conditioner further includes: and when the number of the indoor units is larger than a third number, controlling the opening and/or closing of the electronic expansion valve corresponding to each target indoor unit based on a preset operation number, the opening sequence and/or the closing sequence.
By adopting the technical scheme, when the number of the indoor units which are simultaneously started or shut down is large, the starting or shutting down waiting time can be reduced, and the use experience of a user is improved.
According to an embodiment of the present invention, in another aspect, there is provided an indoor unit control device of a multi-split air conditioner, including: the acquisition module is used for acquiring the capacity variation and the number variation of the indoor units of the multi-connected air conditioner in a preset period; the judging module is used for judging whether each electronic expansion valve corresponding to the indoor unit meets the sequencing control condition or not based on the capacity variation and the number variation; the sequencing control condition is related to the number of target indoor units which are turned on or turned off in a preset period; and the control module is used for determining the opening sequence and/or the closing sequence of the electronic expansion valve corresponding to each target indoor unit when the multi-connected air conditioner meets the sequencing control condition, and controlling the opening and/or the closing of the electronic expansion valve corresponding to each target indoor unit based on the opening sequence and/or the closing sequence.
According to an embodiment of the present invention, in another aspect, an air conditioner is provided, which includes a computer readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and when executed, implements the method according to any one of the first aspect.
According to an embodiment of the present invention, in another aspect, a computer-readable storage medium is provided, which is characterized by storing a computer program, and when the computer program is read and executed by a processor, the computer program implements the method according to any one of the first aspect.
The invention has the following beneficial effects: whether the multi-connected air conditioner meets the sequencing control condition is judged by the capacity variation and the number variation based on the indoor units, and the electronic expansion valves connected with the target indoor units meeting the sequencing control condition are sequentially opened or closed according to the opening sequence or the closing sequence, so that the problem of unbalanced refrigerant flow in pipelines can be avoided to a certain extent, the fluctuation degree of the multi-connected air conditioner is reduced, the running stability of the multi-connected air conditioner is improved, and the comfort experience of users is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a flowchart of a control method for an indoor unit of a multi-connected air conditioner according to the present invention;
FIG. 2 is a schematic structural diagram of a multi-connected air conditioner according to the present invention;
fig. 3 is a schematic structural diagram of an indoor unit control device of a multi-split air conditioner according to the present invention.
Icon:
21-2 i-indoor unit; EEV 1-EEVi-electronic expansion valve; ta (1) to Ta (i) -ambient temperature.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
the present embodiment provides a method for controlling an indoor unit of a multi-split air conditioner, which can be applied to the multi-split air conditioner, referring to a flowchart of the method for controlling the indoor unit of the multi-split air conditioner shown in fig. 1, the method mainly includes the following steps S102 to S106:
and step S102, acquiring the capacity variation and the number variation of the indoor units of the multi-connected air conditioner in a preset period.
The multi-connected air conditioner comprises a plurality of indoor units, each indoor unit is respectively and independently provided with a corresponding electronic expansion valve, each electronic expansion valve is used for controlling the flow of refrigerant flowing to the indoor unit, and the flow of the refrigerant flowing into the indoor unit can be correspondingly controlled by controlling the opening and closing of the electronic expansion valves. When the capacity of the indoor unit of the multi-connected air conditioner is detected to be changed, the capacity change quantity of the indoor unit of the multi-connected air conditioner is determined according to an indoor unit starting instruction input by a user; the number variation comprises an increasing amount or a reducing amount of the indoor units, the number increasing amount of the indoor units which are started is determined according to the number of the received starting instructions, and the number reducing amount of the indoor units which are closed is determined according to the number of the received shutdown instructions. The capacity of the indoor unit is also the rated capacity of the indoor unit and is in KW.
And step S104, judging whether each electronic expansion valve corresponding to the indoor unit meets the sequencing control condition or not based on the capacity variation and the number variation.
The sequencing control conditions are related to the number of target indoor units which are opened or closed in a preset period, when the number of the indoor units which are opened or closed in the preset period is large, electronic expansion valves of the indoor units need to be synchronously operated, and the problem that the air conditioner generates large fluctuation due to unbalanced refrigerant flow in the air conditioning system is avoided. And judging whether the electronic expansion valves of the target indoor units which are simultaneously opened or closed need to be subjected to sequencing control or not based on the capacity variation and the number variation of the indoor units, namely judging whether the number of the target indoor units which are simultaneously opened or the number of the target indoor units which are simultaneously closed can cause large fluctuation to an air conditioning system or not.
And S106, if so, determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the target indoor units, and controlling the opening and/or the closing of the electronic expansion valves corresponding to the target indoor units based on the opening sequence and/or the closing sequence.
When the multi-connected air conditioner meets the sequencing control condition, namely when electronic expansion valves corresponding to a plurality of target indoor units need to be opened or closed simultaneously, an opening sequence is set for each expansion valve needing to be opened in a preset period, a closing sequence is set for each expansion valve needing to be closed in the preset period, and the electronic expansion valves connected with the target indoor units are controlled to be opened and/or closed based on the set opening sequence and/or closing sequence.
According to the indoor unit control method of the multi-connected air conditioner, whether the multi-connected air conditioner meets the sequencing control condition is judged based on the capacity variation and the number variation of the indoor units, and the electronic expansion valves connected to the target indoor units meeting the sequencing control condition are sequentially opened or closed according to the opening sequence or the closing sequence, so that the problem of unbalanced refrigerant flow in pipelines can be avoided to a certain extent, the fluctuation degree of the multi-connected air conditioner is reduced, the running stability of the multi-connected air conditioner is improved, and the comfort experience of users is further improved.
In order to improve the reliability of controlling the multiple air-conditioning indoor units, the embodiment provides a specific implementation manner for obtaining the capacity variation and the number variation of the multiple air-conditioning indoor units in a preset period: acquiring an indoor unit starting instruction or an indoor unit shutdown instruction input by a user in a preset period; and determining the capacity variation and the number variation of the multi-connected air conditioners according to the starting instruction or the shutdown instruction. When a user needs to turn on or turn off a certain indoor unit, an indoor unit turn-on instruction or an indoor unit turn-off instruction is sent to the multiple units, and both the turn-on instruction and the turn-off instruction include indoor unit information (such as an address or a number of the indoor unit) for executing the turn-on instruction or the turn-off instruction.
The capacity information of each indoor unit is stored in the multi-connected air conditioner, and the quantity variation of the indoor units in the preset period is determined according to the quantity of the starting instructions or the shutdown instructions received in the preset period by acquiring the starting instructions and the shutdown instructions input by a user in the preset period; the capacity variation of the indoor units in the preset period is determined according to the capacity information of the indoor units which are changed, the starting number, the shutdown number and the capacity variation of the indoor units in the preset period can be accurately monitored, an important basis is provided for judging whether the electronic expansion valves need to be controlled in a sequencing mode, and the reliability of indoor unit control of the multi-connected air conditioner is improved.
In order to improve the operation stability of the multi-connected air conditioners, the present embodiment provides an implementation manner for determining whether the multi-connected air conditioners satisfy the sequencing control condition based on the capacity variation and the number variation, and the following steps (1) to (2) may be specifically referred to:
step (1): and determining the capacity change rate of the indoor unit in the preset period based on the capacity change amount.
The capacity change rate Δ Q of the indoor unit in a preset period is (Qc (t) -Qc (t-L))/Qc (t-L), where L is the preset period, (Qc (t) -Qc (t-L)) is the capacity change amount in the preset period, Qc (t) is the indoor unit capacity acquired at an arbitrary time t, and Qc (t-L) is the indoor unit capacity acquired at time (t-L). The preset period L may be set according to an actual condition, and when the refrigerant distribution imbalance of the multi-split air conditioner is caused by simultaneous opening or closing of the plurality of electronic expansion valves within the period L, the period L may be used as the preset period.
Step (2): and when the absolute value of the capacity change rate is larger than or equal to the first change rate and the absolute value of the number change amount is larger than or equal to the first number, determining that the multi-connected air conditioner meets the sequencing control condition.
When | Δ Q | ≧ ζ and | Δ N | ≧ a, it is determined that there are more than a first number of indoor units to be turned on or turned off within a preset period, and it is further determined that the multi-connected air conditioner satisfies a sorting control condition, Δ Q is a capacity change rate of the indoor units, Δ N is a number change amount, ζ is a first change rate, and a is a first number. Namely, when delta Q is larger than or equal to zeta and delta N is larger than or equal to a, or when delta Q is smaller than or equal to-zeta and delta N is smaller than or equal to-a, the multi-connected air conditioner is determined to meet the sequencing control condition.
And when the delta Q is larger than or equal to zeta and the delta N is larger than or equal to a, the starting number of the indoor units is newly increased, a plurality of indoor units of the multi-connected air conditioner are started in a preset period, and the multi-connected air conditioner is determined to meet the sequencing control condition. And when the delta Q is less than or equal to zeta and the delta N is less than or equal to alpha, the capacity change rate and the number change are negative values, which indicates that a plurality of indoor units of the multi-connected air conditioner are shut down in a preset period, and the multi-connected air conditioner is determined to meet the sequencing control condition. The first rate of change may be any value between 30% and 50%, and the number change amount Δ N is Nc (t) -Nc (t-L), where Nc (t) is the total number of indoor units operated at any time t, Nc (t-L) is the total number of indoor units operated at any time, and the first number may be any value between 2 and 5. For example, when the number of the multiple air conditioners in the preset period is greater than 2, or when the number of the multiple air conditioners in the preset period is greater than 2, it is determined that the indoor units need to be subjected to sequencing control on the startup or shutdown.
By judging whether the multi-connected air conditioner meets the sequencing control condition or not, the problem that the air conditioner is fluctuated due to the simultaneous action of a plurality of electronic expansion valves when a plurality of indoor units are started or shut down simultaneously can be avoided, and the running stability of the multi-connected air conditioner is improved.
In order to improve the comfort of the user, this embodiment provides an implementation manner for determining an opening order and/or a closing order of the electronic expansion valves corresponding to each target indoor unit, which may be specifically executed with reference to the following steps 1 to 3:
step 1: and acquiring the current set wind level, the indoor unit capacity and the indoor temperature difference of each target indoor unit.
Each indoor unit of the multi-split air conditioner is provided with an independent temperature sensor, the temperature sensor is used for detecting the indoor environment temperature of each indoor unit, the current set temperature input by a user is obtained, and the difference value between the environment temperature and the current set temperature is calculated to obtain the indoor temperature difference corresponding to the indoor unit.
The target indoor units are a plurality of indoor units which receive a starting instruction or a shutdown instruction in a preset period, and the multi-connected air conditioner can acquire the running state of each indoor unit and acquire the indoor unit capacity of each target indoor unit and the current set wind gear input by a user in each target indoor unit.
Step 2: and carrying out priority sequencing on the currently set wind shield, the indoor temperature difference and the indoor unit capacity to obtain a priority sequencing result.
And performing priority ranking on the obtained multiple related parameters of the indoor unit to obtain a priority ranking result of the currently set wind shield, the indoor temperature difference and the indoor unit capacity, wherein the priority ranking result can represent the importance degree of the starting sequence of the electronic expansion valve. The current setting wind gear, the indoor temperature difference and the indoor unit capacity are prioritized, and the current setting wind gear, the indoor temperature difference and the indoor unit capacity can be set according to the requirements of users on the multi-connected air conditioners.
When the comfort requirement of the user on the air conditioner is high, the priority ranking result can be the indoor temperature difference, the currently set wind level and the indoor unit capacity, so that the starting sequence or the closing sequence of the electronic expansion valve is preferentially determined according to the indoor temperature difference of the indoor unit, the temperature requirement of the user is preferentially met, the indoor temperature difference is reduced, and the comfort experience of the user is improved. When the requirement of a user on the stability of the air conditioner is high, the priority ranking result can be the capacity of the indoor unit, the current set wind level and the indoor temperature difference, so that the starting sequence or the closing sequence of the electronic expansion valve can be determined preferentially according to the capacity of the indoor unit, the fluctuation of an air conditioning system caused by large capacity change of the indoor unit is avoided, and the running stability of the multi-connected air conditioner is improved.
And step 3: and determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the target indoor units based on the priority ranking result.
And (b) based on the priority sequencing results of the currently set wind gear, the indoor temperature difference and the indoor unit capacity, sequencing the opening and/or closing of the electronic expansion valves corresponding to the target indoor units to obtain an opening sequence and/or a closing sequence, and specifically referring to the following steps a-b to execute:
step a, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each target indoor unit based on the gear level of each current set wind gear.
In a specific embodiment, the priority ranking result is a current setting wind gear, an indoor temperature difference and an indoor unit capacity in sequence. The opening sequence is obtained by sequencing the current set wind gears of all target indoor units according to the sequence from high gear to low gear, and the closing sequence is obtained by sequencing the current set wind gears of all target indoor units according to the sequence from low gear to high gear.
And sequencing the target indoor units according to the sequence of the current set wind level from high to low, and taking the sequencing result as the opening sequence of the electronic expansion valve corresponding to each target indoor unit. And sequencing the target indoor units according to the sequence of the current set wind level from low to high, and taking the sequencing result as the closing sequence of the electronic expansion valve corresponding to each target indoor unit. Because the indoor machine with the current set wind shield as the high wind shield can ensure sufficient air quantity, the liquid refrigerant flowing through the heat exchanger absorbs heat and is changed into the gaseous refrigerant, the air quantity of the indoor machine with the low wind shield is small, and if the liquid refrigerant is not sufficiently evaporated, the liquid return of the compressor is easily caused.
When the electronic expansion valves of the indoor units act synchronously, the refrigerant needs to be redistributed in the pipeline, so that the pressure of the air suction side of the compressor is firstly reduced and then increased, and the air conditioner is unstable in operation.
The electronic expansion valves are sequentially opened according to the sequence from high to low of the target indoor unit gears, and are sequentially closed according to the sequence from low to high of the target indoor unit gears, so that the running stability of the multi-split air conditioner is improved, the air supply requirement of a user is generally high when the current set air gear input by the user is the high gear, the electronic expansion valve of the low gear indoor unit is preferentially closed by preferentially opening the electronic expansion valve of the high gear indoor unit, the phenomenon that liquid return of the compressor is caused due to insufficient evaporation of liquid refrigerants is avoided, and the running reliability of the compressor is ensured.
And b, when two or more second target indoor units exist in the target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference and the indoor unit capacity.
And the current set wind grades of the second target indoor units are the same. When the target indoor units include two or more second target indoor units with the same current setting wind level, the second target indoor units with the same current setting wind level may be further sorted based on the indoor temperature difference and the indoor unit capacity of each second target indoor unit.
And determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference corresponding to the second target indoor units. The opening sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from large to small, and the closing sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from small to large.
And sequencing the second target indoor units according to the sequence of the indoor temperature difference from high to low, and taking the obtained sequencing result as the opening sequence of the electronic expansion valve corresponding to each second target indoor unit. And sequencing the second target indoor units according to the sequence of the indoor temperature difference from low to high, and taking the obtained sequencing result as the closing sequence of the electronic expansion valve corresponding to each second target indoor unit.
Through setting for the wind shelves at present the same, the order of opening and closing to electronic expansion valve based on the indoor difference in temperature is ordered, avoids the air-out temperature of multiple air conditioner to fluctuate, through the electronic expansion valve that the great indoor set of the preferential opening difference in temperature corresponds, preferentially closes the electronic expansion valve that the little indoor set of the preferential closing difference in temperature corresponds to satisfy user's temperature demand, promoted user's comfort and experienced.
And when two or more than two third target indoor units exist in the second target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each third target indoor unit based on the indoor unit capacity of each third target indoor unit. The indoor temperature difference of each third target indoor unit is the same, the opening sequence of the electronic expansion valves corresponding to the third target indoor units is obtained by sequencing the indoor unit capacity of each third target indoor unit from small to large, and the closing sequence of the electronic expansion valves corresponding to the third target indoor units is obtained by sequencing the indoor unit capacity of each third target indoor unit from large to small.
And when the second target indoor units comprise two or more third target indoor units with the same indoor temperature difference, further sequencing the third target indoor units with the same indoor temperature difference based on the indoor unit capacity of each third target indoor unit. And sequencing the third target indoor units according to the sequence of the capacities of the indoor units from small to large, and taking the obtained sequencing result as the opening sequence of the electronic expansion valve corresponding to each third target indoor unit. And sequencing the third target indoor units according to the sequence of the capacities of the indoor units from large to small, and taking the obtained sequencing result as the closing sequence of the electronic expansion valve corresponding to each third target indoor unit.
Because the influence of the indoor unit with small capacity on the indoor unit in the starting state is relatively small, the fluctuation of the air conditioning system is small, the electronic expansion valve corresponding to the indoor unit with small capacity is preferentially opened and the electronic expansion valve corresponding to the indoor unit with large capacity is preferentially closed when the indoor temperature difference is the same, the fluctuation of the air conditioning system can be weakened, and the running stability of the multi-connected air conditioner is improved.
In order to improve the reliability of the indoor unit control of the multi-connected air conditioner, the method provided by this embodiment further includes: and when two or more than two fourth target indoor units exist in the third target indoor units, determining the opening sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the communication address of each fourth target indoor unit. The indoor unit capacities of the fourth target indoor units are the same.
And when two or more than two fourth target indoor units with the same indoor unit capacity exist in the third target indoor units, namely the current set wind gear, the indoor temperature difference and the indoor unit capacity of each fourth target indoor unit are the same, and each fourth target indoor unit with the same indoor unit capacity is further sequenced based on the communication address of each fourth target indoor unit. And sequentially opening the electronic expansion valves corresponding to the fourth target indoor units according to the current indoor unit address (communication ID) or the indoor unit number.
By sequentially opening the electronic expansion valves corresponding to the fourth target indoor units according to the communication addresses of the indoor units when the currently set wind level, the indoor temperature difference and the indoor unit capacity of the indoor units are the same, the problem that the air conditioning system is unstable in operation due to synchronous actions of the electronic expansion valves of a plurality of indoor units can be avoided, the temperature fluctuation of the coil pipe is reduced, and the air blowing comfort of the air conditioner is improved.
And when the running time of the fourth target indoor units is the same, the closing sequence of the electronic expansion valves corresponding to the fourth target indoor units is determined based on the communication addresses of the fourth target indoor units.
When a plurality of electronic expansion valves need to be closed in a preset period, the opening time and the closing time of the electronic expansion valves of each indoor unit are detected, the running time of each fourth target indoor unit is calculated, the running times are sequenced from high to low, the electronic expansion valves of the indoor units with longer running time are closed preferentially, and the electronic expansion valves of the indoor units with shorter running time are closed later. Because the indoor unit is cooled and operated for a period of time, condensation is easily formed on the heat exchanger, the electronic expansion valve of the indoor unit with longer operation time is closed preferentially, the condensation can be reduced, and the operation stability of the multi-connected air conditioner is improved.
And when two or more than two fifth target indoor units with the same running time exist in the fourth target indoor units, further sequencing the fifth target indoor units with the same indoor unit capacity based on the communication addresses of the fifth target indoor units. And sequentially closing the electronic expansion valves corresponding to the fifth target indoor units according to the current indoor unit address (communication ID) or the indoor unit number.
In a specific embodiment, in the opening sequence and the closing sequence of the electronic expansion valve, the time interval for opening or closing the electronic expansion valve of each indoor unit is t2 (preferably 0 to 10 seconds), so as to avoid unstable system operation caused by simultaneous opening or closing. The sequencing of the indoor units only plays a role in controlling the opening or closing of the electronic expansion valve of the indoor unit, and does not influence the control sequence of the components such as the motor, the air guide door and the like of the indoor unit.
In order to further improve the user experience, the method provided by this embodiment further includes: and when the number of the indoor units is larger than the third number, controlling the opening and/or closing of the electronic expansion valves corresponding to the target indoor units based on the preset operation number, the opening sequence and/or the closing sequence. The third number is greater than the first number, and when the number of the indoor units that are turned on or turned off at the same time is large, in order to reduce the waiting time for turning on or turning off, a preset number of operations for simultaneously turning on or turning off the electronic expansion valve may be increased, where the preset number of operations may be, for example, 2 or 3, and a value range of the third number may be any value from 5 to 10.
For example, when electronic expansion valves of a plurality of indoor units are sequentially opened, the electronic expansion valves of the first and second sequenced electronic expansion valves may be opened preferentially according to the opening sequence, and after an interval of 2 seconds, the electronic expansion valves of the third and fourth sequenced electronic expansion valves may be opened, and so on, until the electronic expansion valves of the indoor units that are started by the user within the preset period are all opened.
According to the control method for the indoor unit of the multi-split air conditioner, the opening sequence or the closing sequence of the electronic expansion valves is automatically determined based on the current set wind gear, the indoor temperature difference and the indoor unit capacity of the indoor unit, so that system parameter fluctuation caused by simultaneous opening of the electronic expansion valves can be prevented, the influence on the running indoor unit is avoided, air outlet temperature fluctuation caused by switching of the running indoor unit is reduced, sudden cooling and sudden heating are avoided, and the refrigerating comfort is improved.
Example two:
corresponding to the indoor unit control method of the multi-connected air conditioner provided in the first embodiment, an embodiment of the present invention provides an example of controlling an electronic expansion valve of the multi-connected air conditioner by applying the indoor unit control method of the multi-connected air conditioner, and the following steps 1) to 6) may be specifically referred to:
step 1): and when the capacity of the indoor unit of the multi-connected air conditioner is detected to be changed, detecting the running state of the multi-connected air conditioner.
The running state of the multi-connected air conditioner comprises the total number and the total capacity of the indoor units, the number and the capacity of the indoor units in the running state at present and the current set wind gear of each indoor unit.
Referring to the schematic diagram of the multi-connected air conditioner shown in fig. 2, the multi-connected air conditioner includes a plurality of indoor units 21-2 i and a plurality of electronic expansion valves EEV 1-EEVi, each indoor unit is provided with a corresponding electronic expansion valve, when a user opens the indoor unit 2i, the corresponding electronic expansion valve EEVi is opened to allow a refrigerant to enter the indoor unit, and the flow rate of the refrigerant entering the indoor unit can be controlled by controlling the opening degree of the electronic expansion valve. Starting timing from the starting time of the electronic expansion valves of the indoor units, recording the starting time of each indoor unit, resetting the timing when the electronic expansion valves are closed to the minimum opening degree, restarting the timing when the electronic expansion valves are opened again, and keeping the resetting action of the electronic expansion valves untimed.
Step 2): and detecting the current set temperature and the ambient temperature of each indoor unit, and calculating the indoor temperature difference of each indoor unit based on the current set temperature and the ambient temperature.
As shown in fig. 2, each indoor unit is provided with a temperature sensor for detecting the ambient temperature Ta (1) to Ta (i) of the room in which the indoor unit is located, obtaining the current set temperature tset (i) input by the user in each indoor unit, and calculating the indoor temperature difference Δ t (i) in the room in which each indoor unit is located, Ta (i) -tset (i), where i is 1,2, and 3 … ….
Step 3): the capacity change rate Δ Q, Δ Q ═ Q (Qc (t) -Qc (t-L))/Qc (t-L) of the indoor unit of the multi-type air conditioner is calculated.
Wherein, Qc (t) is the total capacity of the indoor unit detected at the current time, Qc (t-L) is the total capacity of the indoor unit detected before L time, and L is the preset period.
Step 4): and calculating the quantity change quantity delta N of the multiple air-conditioning indoor units, wherein the delta N is Nc (t) -Nc (t-L).
Nc (t) is the total number of indoor units in the operating state detected at the current moment, and Nc (t-L) is the total number of indoor units in the operating state detected before L time.
Step 5): when the multi-connected air conditioner meets the conditions that delta Q is larger than or equal to zeta (zeta is preferably 30-50%) and delta N is larger than or equal to 2, the capacity of the running indoor units of the air conditioner is increased, the number of newly-added starting units is larger than or equal to 2, the capacity change of the indoor units is large, and the newly-added indoor units need to be sorted.
Detecting the current set wind level of the newly added indoor units, sequencing the indoor units according to the current set wind level, setting the priority of the indoor unit with high wind level to be higher, setting the priority of the indoor unit with low wind level to be lower, and executing opening action according to the priority sequence of the indoor units by the electronic expansion valve. Because the indoor machine with high air level can ensure sufficient air quantity, the liquid refrigerant flowing through the heat exchanger absorbs heat and is changed into gaseous refrigerant, the indoor machine with low air level has small air quantity, and if the liquid refrigerant is not sufficiently evaporated, the liquid return of the compressor is easily caused.
And detecting the indoor temperature difference of the indoor unit, wherein the indoor temperature difference is equal to the ambient temperature Ta-the current set temperature Tset, the priority of the indoor unit with larger indoor temperature difference is higher, and the priority of the indoor unit with smaller indoor temperature difference is lower. Because the indoor constant temperature difference is large, the refrigeration requirement in a room is large, and the waiting time can be reduced by preferentially opening the expansion valve, so that the indoor temperature difference is rapidly reduced to a reasonable interval.
The capacity of the newly added indoor units is detected, the starting sequence is set according to the capacity, the priority of the indoor units with small capacity is high, and the priority of the indoor units with large capacity is low. The influence of the indoor unit with small capacity on the existing starting-up indoor unit is relatively small, so that the system pressure fluctuation is small, when the small-capacity indoor unit is started, the total capacity of the starting-up indoor unit is increased, and then the large-capacity indoor unit is started, so that the system parameter change caused by the starting-up capacity change is weakened.
If the detection conditions of the indoor units are the same, automatically sequencing the newly added indoor units, for example, according to the current indoor unit address (indoor unit communication ID) sequence, and then sequentially executing a starting action (an electronic expansion valve is opened); the opening time interval of the electronic expansion valve of each indoor unit is t1 (preferably 0-10 seconds), so that unstable system operation caused by simultaneous opening is avoided.
If Δ N is detected to be greater than or equal to a (a is preferably 5-10), in order to reduce the startup waiting time, the number of the simultaneously started indoor units can be increased, for example, two indoor units with priorities of 1 and 2 are simultaneously started, then the indoor units with priorities of 3 and 4 are simultaneously started, and so on.
Step 6): when the multi-connected air conditioner meets the condition that delta Q is less than or equal to zeta (zeta is preferably 30-50%) and delta N is greater than or equal to 2, judging that the capacity of the running indoor units of the air conditioner is reduced, the number of the indoor units needing to be closed is greater than or equal to 2, and performing the closing action of the expansion valve after sequencing the indoor units.
The method comprises the steps of detecting a current set wind level of an indoor unit needing to be closed, sequencing the indoor units according to the current set wind level, setting the priority of the indoor unit with a low wind level to be high, setting the priority of the indoor unit with a high wind level to be low, and executing closing action by an electronic expansion valve according to the priority sequence of the indoor units. Because the indoor machine with high air level can ensure sufficient air quantity, the liquid refrigerant flowing through the heat exchanger absorbs heat and is changed into gaseous refrigerant, the indoor machine with low air level has small air quantity, and if the liquid refrigerant is not sufficiently evaporated, the liquid return of the compressor is easily caused.
And detecting the indoor temperature difference of the indoor unit, wherein the indoor temperature difference is equal to the ambient temperature Ta-the current set temperature Tset, the priority of the indoor unit with small indoor temperature difference is high, and the priority of the indoor unit with large indoor temperature difference is low. Because the small indoor temperature difference indicates that the temperature in the room is close to the current set temperature, the refrigeration requirement in the room is small, the electronic expansion valve of the indoor unit can be closed preferentially, the large indoor temperature difference indicates that the refrigeration requirement in the room is large, and the expansion valve is closed after delay, so that the sufficient evaporation of the refrigerant can be ensured.
The method comprises the steps of detecting the capacity of the indoor units needing to be closed, setting a starting sequence according to the capacity, wherein the indoor units with large capacity have high priority and the indoor units with small capacity have low priority. Because the indoor unit with large capacity has relatively large influence on the indoor unit in operation, the system pressure fluctuation is large, and conversely, the influence of the closing of the indoor unit with small capacity on the indoor unit in operation is small. When a plurality of indoor units need to be closed, the electronic expansion valve of the high-capacity indoor unit is closed preferentially, and then the electronic expansion valve of the low-capacity indoor unit is closed, so that the influence of shutdown actions on system parameters can be weakened.
Detecting the running time of the indoor unit needing to be closed, wherein the priority of the indoor unit with long running time is high, the electronic expansion valve is closed firstly, the priority of the indoor unit with short running time is low, and the electronic expansion valve is closed after delay; the indoor machine is refrigerated for a period of time, condensation is easily formed on the heat exchanger, and the condensation can be reduced by closing the electronic expansion valve preferentially.
If the detection conditions of the indoor units are the same, automatically sequencing the newly added indoor units, for example, according to the current indoor unit address (indoor unit communication ID) sequence, and then sequentially executing the closing action of the electronic expansion valve; the closing time interval of the electronic expansion valve of each indoor unit is t2 (preferably 0-10 seconds), so that unstable system operation caused by simultaneous closing is avoided.
If Δ N is detected to be greater than or equal to a (a is preferably 5-10), in order to reduce the waiting time for shutdown, the number of simultaneous shutdown operations may be increased, for example, two indoor units with priorities of 1 and 2 are simultaneously shutdown, then the indoor units with priorities of 3 and 4 are simultaneously shutdown, and so on. The sequencing of the indoor units only plays a role in controlling the opening or closing of the electronic expansion valve of the indoor unit, and does not influence the control sequence of the components such as the motor, the air guide door and the like of the indoor unit. The indoor unit is closed and comprises an electronic expansion valve control of the indoor unit to warm stop or warm start.
When partial indoor units are opened or closed, if the situation that the sequencing conditions are not met is detected, for example, the capacity change rate-zeta < delta Q < zeta, or the change of the number of the indoor units is delta N < 2, the opening or closing of the electronic expansion valves of the indoor units is not automatically sequenced.
Example three:
corresponding to the indoor unit control method of the multi-connected air conditioner provided in the first embodiment, an embodiment of the present invention provides an indoor unit control of a multi-connected air conditioner, which can be applied to a multi-connected air conditioner, see a schematic structural diagram of an indoor unit control device of a multi-connected air conditioner shown in fig. 3, where the device includes the following modules:
the obtaining module 31 is configured to obtain a capacity variation and a number variation of indoor units of the multi-split air conditioner in a preset period.
A judging module 32, configured to judge whether each electronic expansion valve corresponding to the indoor unit satisfies a sorting control condition based on the capacity variation and the number variation; the sequencing control condition is related to the number of the target indoor units which are turned on or turned off in a preset period.
And the control module 33 is configured to determine an opening order and/or a closing order of the electronic expansion valves corresponding to each target indoor unit when the multi-split air conditioner satisfies the sequencing control condition, and control the opening and/or closing of the electronic expansion valves corresponding to each target indoor unit based on the opening order and/or the closing order.
According to the indoor unit control device of the multi-connected air conditioner, whether the multi-connected air conditioner meets the sequencing control condition is judged based on the capacity variation and the number variation of the indoor units, and the electronic expansion valves connected to the target indoor units meeting the sequencing control condition are sequentially opened or closed according to the opening sequence or the closing sequence, so that the problem of unbalanced refrigerant flow in pipelines can be avoided to a certain extent, the fluctuation degree of the multi-connected air conditioner is reduced, the running stability of the multi-connected air conditioner is improved, and the comfort experience of users is further improved.
In an embodiment, the obtaining module 31 is further configured to obtain an indoor unit power-on instruction or an indoor unit power-off instruction input by a user within a preset period; and determining the capacity variation and the number variation of the multi-connected air conditioners according to the starting instruction or the shutdown instruction.
In an embodiment, the determining module 32 is further configured to determine a capacity change rate of the indoor unit in a preset period based on the capacity change amount; and when the absolute value of the capacity change rate is larger than or equal to the first change rate and the absolute value of the number change amount is larger than or equal to the first number, determining that the multi-connected air conditioner meets the sequencing control condition.
In an embodiment, the control module 33 is further configured to obtain a current setting wind level, an indoor unit capacity, and an indoor temperature difference of each target indoor unit; the indoor temperature difference is the difference value between the environmental temperature of the target indoor unit and the current set temperature; carrying out priority sequencing on the currently set wind gear, the indoor temperature difference and the indoor unit capacity to obtain a priority sequencing result; and determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the target indoor units based on the priority ranking result.
In an embodiment, the control module 33 is further configured to determine an opening order and/or a closing order of the electronic expansion valve corresponding to each target indoor unit based on the gear level of each currently set wind gear; the starting sequence is obtained by sequencing the current set wind gears of all target indoor units according to the sequence from high gear to low gear, and the closing sequence is obtained by sequencing the current set wind gears of all target indoor units according to the sequence from low gear to high gear; when two or more than two second target indoor units exist in the target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each second target indoor unit based on the indoor temperature difference and the indoor unit capacity; and the current set wind gears of the second target indoor units are the same.
In an embodiment, the control module 33 is further configured to determine an opening order and/or a closing order of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference corresponding to the second target indoor units; the opening sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from large to small, and the closing sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from small to large; when two or more than two third target indoor units exist in the second target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each third target indoor unit based on the capacity of the indoor unit of each third target indoor unit; the indoor temperature difference of each third target indoor unit is the same, the opening sequence of the electronic expansion valves corresponding to the third target indoor units is obtained by sequencing the indoor unit capacity of each third target indoor unit from small to large, and the closing sequence of the electronic expansion valves corresponding to the third target indoor units is obtained by sequencing the indoor unit capacity of each third target indoor unit from large to small.
In one embodiment, the above apparatus further comprises:
the first determining module is used for determining the opening sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the communication address of each fourth target indoor unit when two or more fourth target indoor units exist in the third target indoor unit; the indoor unit capacity of each fourth target indoor unit is the same; and/or acquiring the running time of each fourth target indoor unit, determining the closing sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the running time, and determining the closing sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the communication address of each fourth target indoor unit when the running times of the fourth target indoor units are the same.
And the second determining module is used for controlling the opening and/or closing of the electronic expansion valves corresponding to the target indoor units based on the preset operation number, the opening sequence and/or the closing sequence when the number of the variable quantities is larger than the third number.
According to the indoor unit control device of the multi-split air conditioner, the opening sequence or the closing sequence of the electronic expansion valves is automatically determined based on the current set wind gear, the indoor temperature difference and the indoor unit capacity of the indoor unit, so that system parameter fluctuation caused by simultaneous opening of the electronic expansion valves can be prevented, the indoor unit in operation is influenced, air outlet temperature fluctuation caused by switching of the indoor unit in operation is reduced, sudden cooling and sudden heating are avoided, and the refrigerating comfort is improved.
Example four:
corresponding to the indoor unit control method of the multi-connected air conditioner provided in the first embodiment, this embodiment provides an air conditioner, where the air conditioner includes a computer-readable storage medium storing a computer program and a processor, and when the computer program is read and executed by the processor, the indoor unit control method of the multi-connected air conditioner provided in the first embodiment is implemented.
Example five:
the present embodiment further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the above-mentioned indoor unit control method of a multi-split air conditioner, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The indoor unit control device and the air conditioner of the multi-split air conditioner disclosed in the embodiment correspond to the indoor unit control method of the multi-split air conditioner disclosed in the embodiment, so that the description is relatively simple, and relevant parts can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (11)

1. A control method for an indoor unit of a multi-connected air conditioner is characterized by comprising the following steps:
acquiring the capacity variation and the number variation of indoor units of the multi-connected air conditioner in a preset period;
judging whether each electronic expansion valve corresponding to the indoor unit meets a sequencing control condition or not based on the capacity variation and the number variation; the sequencing control condition is related to the number of target indoor units which are turned on or turned off in a preset period;
if so, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each target indoor unit, and controlling the opening and/or closing of the electronic expansion valve corresponding to each target indoor unit based on the opening sequence and/or the closing sequence.
2. The method as claimed in claim 1, wherein the step of obtaining the capacity variation and the number variation of the indoor units of the multi-type air conditioner in a preset period comprises:
acquiring an indoor unit starting instruction or an indoor unit shutdown instruction input by a user in a preset period;
and determining the capacity variation and the number variation of the multi-connected air conditioners according to the starting instruction or the shutdown instruction.
3. The indoor unit control method of a multi-type air conditioner according to claim 1, wherein the step of determining whether the multi-type air conditioner satisfies a sequencing control condition based on the capacity variation and the number variation includes:
determining the capacity change rate of the indoor unit in the preset period based on the capacity change amount;
and when the absolute value of the capacity change rate is greater than or equal to a first change rate and the absolute value of the number change amount is greater than or equal to a first number, determining that the multi-connected air conditioner meets the sequencing control condition.
4. The indoor unit control method of a multi-type air conditioner according to claim 1, wherein the step of determining an opening sequence and/or a closing sequence of the electronic expansion valve corresponding to each target indoor unit includes:
acquiring a current set wind shield, indoor unit capacity and indoor temperature difference of each target indoor unit; the indoor temperature difference is the difference value between the ambient temperature of the target indoor unit and the current set temperature;
carrying out priority sequencing on the currently set wind shield, the indoor temperature difference and the indoor unit capacity to obtain a priority sequencing result;
and determining the opening sequence and/or the closing sequence of the electronic expansion valve corresponding to each target indoor unit based on the priority ranking result.
5. The indoor unit control method of a multi-split air conditioner according to claim 4, wherein the priority ranking result is the current setting air level, the indoor temperature difference, and the indoor unit capacity in turn; the step of determining the opening order and/or the closing order of the electronic expansion valves corresponding to the target indoor units based on the priority ranking results comprises the following steps:
determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each target indoor unit based on the gear level of each current set wind gear; the starting sequence is obtained by sequencing the current set wind gear of each target indoor unit according to the sequence from a high gear to a low gear, and the closing sequence is obtained by sequencing the current set wind gear of each target indoor unit according to the sequence from a low gear to a high gear;
when two or more than two second target indoor units exist in the target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each second target indoor unit based on the indoor temperature difference and the indoor unit capacity; and the current set wind gear of each second target indoor unit is the same.
6. The indoor unit control method of a multi-type air conditioner according to claim 5, wherein the step of determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference and the indoor unit capacity includes:
determining the opening sequence and/or the closing sequence of the electronic expansion valves corresponding to the second target indoor units based on the indoor temperature difference corresponding to the second target indoor units; the opening sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from large to small, and the closing sequence of the electronic expansion valves corresponding to the second target indoor units is obtained by sequencing the indoor temperature difference of each second target indoor unit from small to large;
when two or more than two third target indoor units exist in the second target indoor units, determining the opening sequence and/or closing sequence of the electronic expansion valve corresponding to each third target indoor unit based on the indoor unit capacity of each third target indoor unit; the indoor temperature difference of each third target indoor unit is the same, the opening sequence of the electronic expansion valve corresponding to each third target indoor unit is obtained by sequencing the indoor unit capacity of each third target indoor unit from small to large, and the closing sequence of the electronic expansion valve corresponding to each third target indoor unit is obtained by sequencing the indoor unit capacity of each third target indoor unit from large to small.
7. The indoor unit control method of a multi-type air conditioner according to claim 6, further comprising:
when two or more than two fourth target indoor units exist in the third target indoor units, determining the opening sequence of the electronic expansion valve corresponding to each fourth target indoor unit based on the communication address of each fourth target indoor unit; the indoor unit capacity of each fourth target indoor unit is the same;
and/or the presence of a gas in the gas,
and when the running time of the fourth target indoor unit is the same, the closing sequence of the electronic expansion valve corresponding to each fourth target indoor unit is determined based on the communication address of each fourth target indoor unit.
8. The indoor unit control method of a multi-type air conditioner according to claim 1, further comprising:
and when the number of the indoor units is larger than a third number, controlling the opening and/or closing of the electronic expansion valve corresponding to each target indoor unit based on a preset operation number, the opening sequence and/or the closing sequence.
9. An indoor unit control device for a multi-split air conditioner, comprising:
the acquisition module is used for acquiring the capacity variation and the number variation of the indoor units of the multi-connected air conditioner in a preset period;
the judging module is used for judging whether each electronic expansion valve corresponding to the indoor unit meets the sequencing control condition or not based on the capacity variation and the number variation; the sequencing control condition is related to the number of target indoor units which are turned on or turned off in a preset period;
and the control module is used for determining the opening sequence and/or the closing sequence of the electronic expansion valve corresponding to each target indoor unit when the multi-connected air conditioner meets the sequencing control condition, and controlling the opening and/or the closing of the electronic expansion valve corresponding to each target indoor unit based on the opening sequence and/or the closing sequence.
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method according to any one of claims 1 to 8.
11. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-8.
CN202011617137.3A 2020-12-30 2020-12-30 Indoor unit control method and device of multi-connected air conditioner and air conditioner Active CN112797598B (en)

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CN113280399A (en) * 2021-06-15 2021-08-20 宁波奥克斯电气股份有限公司 Cold air prevention control method and device and air conditioner
CN113405155A (en) * 2021-07-01 2021-09-17 宁波奥克斯电气股份有限公司 Expansion valve control method and device and multi-connected air conditioner
CN113587379A (en) * 2021-07-05 2021-11-02 青岛海信日立空调系统有限公司 Air conditioner control system
CN113531783A (en) * 2021-07-21 2021-10-22 四川虹美智能科技有限公司 Refrigeration anti-freezing control method and device of multi-connected air conditioning system
CN113531783B (en) * 2021-07-21 2022-06-28 四川虹美智能科技有限公司 Refrigeration anti-freezing control method and device of multi-connected air conditioning system
CN113803844A (en) * 2021-10-09 2021-12-17 宁波奥克斯电气股份有限公司 Electronic expansion valve control method and device, air conditioner and computer storage medium
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CN115111723B (en) * 2022-06-21 2023-12-19 珠海格力电器股份有限公司 Control method and control device of air conditioner and air conditioner
CN115183426A (en) * 2022-07-28 2022-10-14 广东美的制冷设备有限公司 Control method of multi-split air conditioner, multi-split air conditioner and storage medium
CN115183426B (en) * 2022-07-28 2024-03-08 广东美的制冷设备有限公司 Control method of multi-split air conditioner, multi-split air conditioner and storage medium
WO2024078090A1 (en) * 2022-10-13 2024-04-18 青岛海尔空调电子有限公司 Method and apparatus for controlling multi-split air conditioner, multi-split air conditioner, and storage medium

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