CN108826599B - Control method for air conditioning system - Google Patents
Control method for air conditioning system Download PDFInfo
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- CN108826599B CN108826599B CN201810436786.XA CN201810436786A CN108826599B CN 108826599 B CN108826599 B CN 108826599B CN 201810436786 A CN201810436786 A CN 201810436786A CN 108826599 B CN108826599 B CN 108826599B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a control method for an air conditioning system. The invention aims to solve the problem that the existing multi-split air conditioning system cannot well control a plurality of indoor units, so that the heat exchange effect of part of the indoor units is difficult to meet the user requirement. To this end, the control method for an air conditioning system of the present invention includes: acquiring coil pipe temperatures of at least two indoor units; calculating the average value of the coil temperatures of the at least two indoor units; selectively adjusting the superheat degree of the indoor unit according to the coil temperature of the indoor unit and the average value of the coil temperature, so that the air conditioning system can effectively judge whether the indoor unit has the condition of excess capacity or insufficient capacity through the coil temperature, and the heat exchange effect of the indoor unit can be effectively ensured to meet the user requirements constantly.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a control method for an air conditioning system.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, an air conditioner has become an indispensable equipment in human life. Generally, in many existing places with large areas, a multi-split air conditioning system is used, that is, one outdoor unit and a plurality of indoor units work together to realize cooling or heating. Meanwhile, the existing multi-split air conditioning system controls a plurality of indoor units by setting a target superheat degree, but the control mode still has certain problems and is difficult to meet the requirements of users.
Specifically, when the existing air conditioning system performs indoor unit matching control, a target superheat degree is usually preset, and then the opening degree of an electronic expansion valve is controlled to enable each indoor unit to reach the target superheat degree; or, some air conditioning systems select different degrees of superheat according to temperature intervals set by different indoor units. However, the superheat degree set by these control methods is constant, and in the actual use process, different indoor units may have different structures and connection modes, and different indoor units usually have different loads, so that the capacity of part of the indoor units is excessive, and the capacity of some indoor units is insufficient.
Accordingly, there is a need in the art for a new control method for an air conditioning system to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing multi-split air conditioning system cannot control a plurality of indoor units well, so that the heat exchange effect of part of the indoor units is difficult to meet the user requirement, the present invention provides a control method for an air conditioning system, wherein the air conditioning system comprises a plurality of indoor units, and the control method comprises: acquiring coil pipe temperatures of at least two indoor units; calculating the average value of the coil temperatures of the at least two indoor units; and selectively adjusting the superheat degree of the indoor unit according to the coil temperature of the indoor unit and the average value of the coil temperature.
In a preferred embodiment of the control method for an air conditioning system, the step of "selectively adjusting the superheat degree of the indoor unit according to the coil temperature of the indoor unit and an average value of the coil temperatures" specifically includes: comparing the difference between the coil temperature of the indoor unit and the average value of the coil temperature with a first preset range; and selectively adjusting the superheat degree of the indoor unit according to the comparison result of the difference value between the coil temperature of the indoor unit and the average value of the coil temperature and the first preset range.
In a preferred embodiment of the control method for an air conditioning system, the step of selectively adjusting the superheat degree of the indoor unit according to a comparison result between the difference between the coil temperature of the indoor unit and the average value of the coil temperature and the first preset range specifically includes: and if the difference value between the coil temperature of the indoor unit and the average value of the coil temperature is within the first preset range, not adjusting the superheat degree of the indoor unit.
In a preferred embodiment of the control method for an air conditioning system, the step of selectively adjusting the superheat degree of the indoor unit according to a comparison result between the difference between the coil temperature of the indoor unit and the average value of the coil temperature and the first preset range specifically includes: if the difference value between the coil temperature of the indoor unit and the average value of the coil temperature is not within the first preset range, acquiring the temperature change rate of the environment where the at least two indoor units are located; and selectively adjusting the superheat degree of the indoor unit according to the temperature change rate of the environment where the at least two indoor units are located.
In a preferred embodiment of the above control method for an air conditioning system, the step of "selectively adjusting the degree of superheat of the indoor units according to the temperature change rates of the environments in which the at least two indoor units are located" specifically includes: calculating the average value of the temperature change rates of the environments where the at least two indoor units are located; comparing the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate with a second preset range; and selectively adjusting the superheat degree of the indoor unit according to the comparison result of the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate and the second preset range.
In a preferred embodiment of the control method for an air conditioning system, the step of selectively adjusting the degree of superheat of the indoor unit according to a comparison result between the ratio of the temperature change rate of the environment in which the indoor unit is located and the average value of the temperature change rate and the second preset range specifically includes: and if the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate is within the second preset range, not adjusting the superheat degree of the indoor unit.
In a preferred embodiment of the control method for an air conditioning system, the step of selectively adjusting the degree of superheat of the indoor unit according to a comparison result between the ratio of the temperature change rate of the environment in which the indoor unit is located and the average value of the temperature change rate and the second preset range specifically includes: and if the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate is not in the second preset range, adjusting the superheat degree of the indoor unit.
In a preferred embodiment of the above control method for an air conditioning system, before the step of "obtaining coil temperatures of at least two indoor units", the control method further includes: acquiring the temperature of the environment where the indoor unit is located and the target average temperature of the air conditioning system; comparing the temperature of the environment where the indoor unit is located with the target average temperature; and selectively executing the step of obtaining the coil temperatures of at least two indoor units according to the comparison result of the temperature of the environment where the indoor units are located and the target average temperature.
In a preferred embodiment of the control method for an air conditioning system, the step of selectively executing the step of obtaining coil temperatures of at least two indoor units according to a comparison result between the temperature of the environment where the indoor units are located and the target average temperature specifically includes: under the refrigeration working condition, if the temperature of the environment where the indoor unit is located is less than or equal to the target average temperature, the step of obtaining the coil temperatures of at least two indoor units is not executed, and the superheat degree of the indoor unit is directly adjusted; and if the temperature of the environment where the indoor units are located is greater than the target average temperature, executing the step of acquiring the coil temperatures of at least two indoor units.
In a preferred embodiment of the control method for an air conditioning system, the step of selectively executing the step of obtaining coil temperatures of at least two indoor units according to a comparison result between the temperature of the environment where the indoor units are located and the target average temperature specifically includes: under the heating condition, if the temperature of the environment where the indoor units are located is greater than or equal to the target average temperature, the step of obtaining the coil temperatures of at least two indoor units is not executed, and the superheat degree of the indoor units is directly adjusted; and if the temperature of the environment where the indoor units are located is less than the target average temperature, executing the step of acquiring the coil temperatures of at least two indoor units.
As can be understood by those skilled in the art, in the technical solution of the present invention, the air conditioning system of the present invention includes a plurality of indoor units, and the control method for an air conditioning system of the present invention includes: acquiring coil pipe temperatures of at least two indoor units; calculating the average value of the coil temperatures of the at least two indoor units; selectively adjusting the superheat degree of the indoor unit according to the coil temperature of the indoor unit and the average value of the coil temperature, so that the air conditioning system can effectively judge whether the indoor unit has the condition of excess capacity or insufficient capacity through the coil temperature, and the heat exchange effect of the indoor unit can be effectively ensured to meet the user requirements constantly.
Drawings
Fig. 1 is a flowchart of main steps of a control method for an air conditioning system of the present invention;
fig. 2 is a flowchart illustrating the detailed steps of the control method for an air conditioning system according to the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention.
The existing air conditioning system based on the background art uses a constant superheat degree when performing indoor unit matching control, and in the actual use process, different indoor units may have different structures and connection modes and have different loads, so that the problems of excessive capacity of part of the indoor units and insufficient capacity of some indoor units are caused. The invention provides a control method for an air conditioning system, wherein the air conditioning system comprises a plurality of indoor units, and the air conditioning system can adjust the superheat degree of different indoor units in real time based on a plurality of basic parameters, so that the air conditioning system can effectively judge whether each indoor unit has the condition of excess capacity or insufficient capacity in time, and the heat exchange effect of each indoor unit can be effectively ensured to meet the requirements of users at any time.
Specifically, in the present preferred embodiment, the air conditioning system includes a controller, and each indoor unit includes a first temperature sensor and a second temperature sensor; the first temperature sensor is used for detecting the temperature of the environment where the indoor unit is located, and the second temperature sensor is used for detecting the temperature of a coil of the indoor unit. Meanwhile, the controller can acquire temperature information detected by the first temperature sensor and the second temperature sensor, and can calculate temperature change rates of environments where different indoor units are located according to the acquired temperature information. In addition, the air conditioning system further includes a plurality of electronic expansion valves, and the controller is capable of controlling opening degrees of the electronic expansion valves. Those skilled in the art will understand that the description of these structures is not limiting, and those skilled in the art can set the specific structure of the air conditioning system according to the actual use requirement; for example, the controller may be a main controller of the air conditioning system, or may be a controller separately set by a technician; as long as the air conditioning system can operate the control method of the present invention.
Referring next to fig. 1, a flowchart illustrating major steps of a control method for an air conditioning system according to the present invention is shown. As shown in fig. 1, the control method of the present invention mainly includes the following steps:
s1: acquiring coil pipe temperatures of at least two indoor units;
s2: calculating the average value of the coil temperatures of at least two indoor units;
s3: and selectively adjusting the superheat degree of the indoor unit according to the coil temperature of the indoor unit and the average value of the coil temperature.
Further, in step S1, the controller may obtain coil temperatures of at least two indoor units, so that the air conditioning system may obtain coil temperature changes of a plurality of indoor units. Next, step S2 is executed, that is, the controller can calculate an average value of the coil temperatures of the at least two indoor units according to the acquired data, so that the air conditioning system can acquire average variation conditions of the coil temperatures of the indoor units according to the data of the coil temperatures, so as to effectively judge the heat exchange capacity of each indoor unit by using the average variation conditions of the coil temperatures as a reference standard. Finally, step S3 is executed, in which the superheat degree of the indoor unit is selectively adjusted according to the coil temperature of the indoor unit and the average value of the coil temperatures.
Specifically, the control method takes the average value of the coil temperatures as a reference standard, and respectively judges whether each indoor unit has the problem of excess capacity or insufficient capacity according to the coil temperature of each indoor unit and the average value of the coil temperatures, so that the air conditioning system can adjust the superheat degree of the indoor unit with the problem of insufficient capacity or excess capacity, the heat exchange capacity of each indoor unit can be matched with the heat exchange requirement of the environment, and each indoor unit can work more efficiently, and the air conditioning system can meet the requirement of a user to the maximum extent.
Referring now to fig. 2, a flowchart illustrating specific steps of a control method for an air conditioning system according to the present invention is shown. It should be noted that, the control method of the present invention will be described below by taking a case where the air conditioning system operates in the cooling mode as an example; meanwhile, although in the preferred embodiment, the air conditioning system acquires the operation data of each indoor unit, it is obvious that the air conditioning system may acquire only the operation data of a part of the indoor units. As shown in fig. 2, the control method of the present invention specifically includes the following steps:
s101: acquiring the temperature of the environment where the indoor unit is located and the target average temperature of the air conditioning system;
s102: judging whether the temperature of the environment where the indoor unit is located is greater than the target average temperature or not; if yes, executing step S104; if not, executing step S103;
s103: directly adjusting the superheat degree of the indoor unit;
s104: acquiring the temperature of a coil pipe of each indoor unit;
s105: calculating the average value of the coil temperatures of all indoor units;
s106: judging whether the difference value of the coil temperature of the indoor unit and the average value of the coil temperature is within a first preset range or not; if yes, go to step S107; if not, go to step S108;
s107: the degree of superheat of the indoor unit is not adjusted;
s108: acquiring the temperature change rate of the environment where each indoor unit is located;
s109: calculating the average value of the temperature change rates of the environments of all the indoor units;
s110: judging whether the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate is within a second preset range or not; if yes, go to step S107; if not, executing step S111;
s111: and adjusting the superheat degree of the indoor unit.
In step S101, the calculation process of the target average temperature is as follows:
first, the set average temperature of all indoor units is calculated:
wherein, the air conditioning system comprises n indoor units TiIndicating the set temperature of the i-th indoor unit.
Then, respectively calculating the difference between the set temperature of each indoor unit and the set average temperature:
finally, corresponding | Delta T of each indoor unitiComparing | with a preset difference value, taking the preset difference value as 3 ℃ as an example: i.e. corresponding to each indoor unitiComparing | with 3 ℃, if the | Delta T corresponding to the indoor unitiIf the absolute value is more than 3 ℃, the set temperature of the indoor unit is taken as an invalid value and does not participate in the calculation; if the indoor unit corresponds to | Delta TiIf the temperature is less than or equal to 3 ℃, the set temperature of the indoor unit is taken as an effective value to continue to participate in the calculation. And repeatedly calculating the residual effective values by using the steps until no invalid value is generated, calculating the average value of all the effective values at the moment, and taking the average value as the target average temperature.
It can be understood that the calculation process of the target average temperature is actually a process similar to that of calculating the average value by removing the maximum and minimum values, and thus the calculation mode can effectively avoid the target average temperature from being influenced by some overhigh set temperatures or overlow set temperatures, so that the temperature which most users feel appropriate is effectively obtained, and further the problem that the air conditioning system influences the overall heat exchange effect to meet the demands of a few users is effectively avoided, so that the refrigeration demands of the most users are met to the maximum extent. Of course, the calculation process in the preferred embodiment is only exemplary, and the technician may set the calculation process of the target average temperature by himself or set the value of the target average temperature by himself according to the actual use requirement.
Further, in step S102, the temperature of the environment where the indoor unit is located is compared with the target average temperature, so as to effectively determine whether the temperature of the environment where the indoor unit is located has reached a temperature that most users feel appropriate. If the temperature of the environment where the indoor unit is located is less than or equal to the target average temperature, the refrigerating effect of the indoor unit is indicated to reach the average level of the air conditioning system; at this time, the target superheat degree of the indoor unit can be properly adjusted to ensure that the air conditioning system distributes less heat exchange medium to the indoor unit, so that the air conditioning system can rapidly distribute more heat exchange medium to other indoor units with insufficient refrigerating capacity, the refrigerating effect of all indoor units in the air conditioning system is effectively balanced, and the overall refrigerating speed of the air conditioning system is effectively increased. The technical personnel in the field can understand that the technical personnel can set the single adjustment amount of the superheat degree according to the actual situation, and the technical personnel can also correspondingly adjust other operation parameters of the indoor unit; for example, the fan speed of the indoor unit is reduced, and the adjustment modes are not limited. Meanwhile, if the temperature of the environment where the indoor unit is located is higher than the target average temperature, the problem that the indoor unit possibly has insufficient refrigerating capacity is solved; in this case, step S104 is performed to further effectively determine the cooling condition of the indoor unit.
Further, in step S104, acquiring a coil temperature of each indoor unit in the air conditioning system; and in step S105, an average value of the coil temperatures of all the indoor units is calculated. It should be noted that, the present invention does not set any limit to the way for the air conditioning system to obtain the temperature of the coil of the indoor unit. Next, step S106 is executed, that is, the difference between the coil temperature of the indoor unit and the average value of the coil temperature is compared with a first preset range. In addition, it should be noted that a technician can set the first preset range according to the actual situation; preferably, the first preset range is-2 ℃ to 2 ℃; meanwhile, the control method obviously can also use the ratio of the coil temperature of the indoor unit to the average value of the coil temperature to participate in judgment.
As can be understood by those skilled in the art, the temperature of the environment where the indoor unit is located can directly reflect the cooling effect of the indoor unit, and meanwhile, the coil temperature of the indoor unit can also reflect the current cooling effect of the indoor unit to a certain extent. Therefore, the difference between the coil temperature of the indoor unit and the average value of the coil temperature represents the deviation between the coil temperature of the indoor unit and the average value. In other words, if the difference value is within the first preset range, it indicates that the cooling effect of the indoor unit is close to the average cooling effect of the air conditioning system; in this case, step S107 is performed, in which the degree of superheat of the indoor unit is not adjusted so that the indoor unit can maintain the average cooling effect. Meanwhile, if the difference value is not within the first preset range, the problem that the indoor unit is possibly over-capacity or under-capacity is solved; at this time, step S108 is executed, so that the air conditioning system can further accurately determine whether the indoor unit has the problem of excessive cooling capacity or insufficient cooling capacity according to the subsequent steps, thereby effectively ensuring the accuracy of the determination.
Further, in step S108, a temperature change rate of an environment in which each indoor unit in the air conditioning system is located is obtained; in step S109, the average value of the temperature change rates of the environments in which all the indoor units are located is calculated. It should be noted that the present invention does not set any limit to the manner in which the air conditioning system obtains the temperature change rate. Next, step S110 is executed, that is, a ratio of the temperature change rate of the environment in which the indoor unit is located to the average value of the temperature change rates is compared with a second preset range. In addition, it should be noted that a technician may set the second preset range according to an actual situation; preferably, said second preset range is 0.8 to 1.2; meanwhile, the control method obviously can also use the difference value between the temperature change rate of the environment where the indoor unit is located and the average value of the temperature change rate to participate in the judgment.
As will be understood by those skilled in the art, the average value of the temperature change rate represents the average cooling speed of the air conditioning system; therefore, the ratio of the rate of change of the temperature of the environment of the indoor unit to the average value of the rate of change of the temperature then represents the rate of deviation between the rate of change of the temperature and the average value. In other words, if the ratio is within the second preset range, it indicates that the cooling speed of the indoor unit is close to the average cooling level of the air conditioning system; in this case, step S107 is performed, in which the degree of superheat of the indoor unit is not adjusted so that the indoor unit maintains the average cooling speed. Meanwhile, if the ratio is not in the second preset range, the situation that the capacity of the indoor unit is excessive or insufficient is indicated; in this case, step S111 is performed to adjust the degree of superheat of the indoor unit.
Further, in step S111, if the difference is greater than the maximum value of the first preset range and the ratio is smaller than the minimum value of the second preset range, it indicates that the indoor unit has a problem of insufficient cooling capacity; at this time, the air conditioning system can appropriately reduce the target superheat degree of the indoor unit, and appropriately increase the opening degree of the electronic expansion valve corresponding to the indoor unit and the rotating speed of the fan, so as to effectively improve the refrigerating capacity of the indoor unit, so that the indoor unit can quickly realize a preset refrigerating effect, and thus the overall refrigerating capacity of the air conditioning system is effectively balanced. Meanwhile, if the difference value is smaller than the minimum value of the first preset range and the ratio value is larger than the maximum value of the second preset range, the problem that the refrigerating capacity of the indoor unit is excessive is solved; at this time, the air conditioning system may appropriately increase the target superheat degree of the indoor unit, and appropriately decrease the opening degree of the electronic expansion valve and the fan rotation speed corresponding to the indoor unit, so that the indoor unit may maintain an average refrigeration level, so that the air conditioning system may distribute more heat transfer media to other indoor units to enhance the refrigeration effect thereof, thereby equalizing the overall refrigeration capacity of the air conditioning system to the maximum extent. As can be understood by those skilled in the art, when the air conditioning system determines that the indoor unit has a problem of insufficient capacity or excessive capacity, the technicians may set a specific adjustment manner for changing the cooling capacity of the indoor unit.
It should be further noted that, when the air conditioning system is in a heating condition, the difference between the air conditioning system and the air conditioning system is in a cooling condition, in step S102, if the temperature of the environment where the indoor unit is located is greater than or equal to the target average temperature, step S103 is executed, that is, the superheat degree of the indoor unit is directly adjusted; meanwhile, if the temperature of the environment where the indoor unit is located is less than the target average temperature, step S104 is performed, so as to further judge the heating capacity of the indoor unit. In addition, in step S111, if the difference is smaller than the minimum value of the first preset range and the ratio is smaller than the minimum value of the second preset range, it indicates that the indoor unit has a problem of insufficient heating capacity; and if the difference value is larger than the maximum value of the first preset range and the ratio value is larger than the maximum value of the second preset range, the problem that the heating capacity of the indoor unit is excessive is solved.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (7)
1. A control method for an air conditioning system including a plurality of indoor units, characterized by comprising:
acquiring coil pipe temperatures of at least two indoor units;
calculating the average value of the coil temperatures of the at least two indoor units;
selectively adjusting the superheat degree of the indoor unit according to the coil temperature of the indoor unit and the average value of the coil temperature;
before the step of obtaining the coil temperatures of at least two indoor units, the control method further comprises the following steps:
acquiring the temperature of the environment where the indoor unit is located and the target average temperature of the air conditioning system;
comparing the temperature of the environment where the indoor unit is located with the target average temperature;
selectively executing the step of obtaining the coil temperatures of at least two indoor units according to the comparison result of the temperature of the environment where the indoor units are located and the target average temperature;
the step of selectively executing the step of obtaining the coil temperatures of at least two indoor units according to the comparison result between the temperature of the environment where the indoor units are located and the target average temperature specifically includes:
under the refrigeration working condition, if the temperature of the environment where the indoor units are located is greater than the target average temperature, executing the step of acquiring the coil temperatures of at least two indoor units;
under the heating condition, if the temperature of the environment where the indoor units are located is less than the target average temperature, executing the step of acquiring the coil temperatures of at least two indoor units;
under the refrigeration working condition, if the temperature of the environment where the indoor unit is located is less than or equal to the target average temperature, the step of obtaining the coil temperatures of at least two indoor units is not executed, and the superheat degree of the indoor unit is directly adjusted;
under the heating condition, if the temperature of the environment where the indoor units are located is greater than or equal to the target average temperature, the step of obtaining the coil temperatures of at least two indoor units is not executed, and the superheat degree of the indoor units is directly adjusted.
2. The control method according to claim 1, wherein the step of selectively adjusting the degree of superheat of the indoor unit based on the coil temperature of the indoor unit and the average value of the coil temperatures includes:
comparing the difference between the coil temperature of the indoor unit and the average value of the coil temperature with a first preset range;
and selectively adjusting the superheat degree of the indoor unit according to the comparison result of the difference value between the coil temperature of the indoor unit and the average value of the coil temperature and the first preset range.
3. The control method according to claim 2, wherein the step of selectively adjusting the degree of superheat of the indoor unit based on the comparison result between the difference between the coil temperature of the indoor unit and the average value of the coil temperature and the first preset range comprises:
and if the difference value between the coil temperature of the indoor unit and the average value of the coil temperature is within the first preset range, not adjusting the superheat degree of the indoor unit.
4. The control method according to claim 2, wherein the step of selectively adjusting the degree of superheat of the indoor unit based on the comparison result between the difference between the coil temperature of the indoor unit and the average value of the coil temperature and the first preset range comprises:
if the difference value between the coil temperature of the indoor unit and the average value of the coil temperature is not within the first preset range, acquiring the temperature change rate of the environment where the at least two indoor units are located;
and selectively adjusting the superheat degree of the indoor unit according to the temperature change rate of the environment where the at least two indoor units are located.
5. The control method according to claim 4, wherein the step of selectively adjusting the degree of superheat of the indoor unit in accordance with the rate of change in temperature of the environment in which the at least two indoor units are located includes:
calculating the average value of the temperature change rates of the environments where the at least two indoor units are located;
comparing the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate with a second preset range;
and selectively adjusting the superheat degree of the indoor unit according to the comparison result of the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate and the second preset range.
6. The control method according to claim 5, wherein the step of selectively adjusting the degree of superheat of the indoor unit based on the comparison result between the ratio of the rate of change in temperature of the environment in which the indoor unit is located and the average value of the rate of change in temperature and the second preset range specifically comprises:
and if the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate is within the second preset range, not adjusting the superheat degree of the indoor unit.
7. The control method according to claim 5, wherein the step of selectively adjusting the degree of superheat of the indoor unit based on the comparison result between the ratio of the rate of change in temperature of the environment in which the indoor unit is located and the average value of the rate of change in temperature and the second preset range specifically comprises:
and if the ratio of the temperature change rate of the environment where the indoor unit is located to the average value of the temperature change rate is not in the second preset range, adjusting the superheat degree of the indoor unit.
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