CN112902391B - Control method of multi-split air conditioner, readable storage medium and multi-split air conditioner - Google Patents
Control method of multi-split air conditioner, readable storage medium and multi-split air conditioner Download PDFInfo
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- CN112902391B CN112902391B CN202110251206.1A CN202110251206A CN112902391B CN 112902391 B CN112902391 B CN 112902391B CN 202110251206 A CN202110251206 A CN 202110251206A CN 112902391 B CN112902391 B CN 112902391B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010257 thawing Methods 0.000 claims abstract description 90
- 238000004378 air conditioning Methods 0.000 claims abstract description 80
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000009825 accumulation Methods 0.000 claims abstract description 22
- 238000012163 sequencing technique Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 description 16
- 238000005057 refrigeration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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Abstract
The invention discloses a control method of a multi-split air conditioner, a readable storage medium and the multi-split air conditioner. The control method comprises the following steps: s1, detecting the running state of each air conditioner indoor unit; s2, dividing each air conditioner indoor unit into defrosting regulation categories according to the running state and the temperature requirement of the room corresponding to each air conditioner indoor unit; s3, selecting and sequencing the air conditioner indoor units capable of executing the defrosting mode according to the defrosting regulation categories; and S4, performing accumulation calculation on the refrigerating capacity of the air conditioning indoor units capable of executing the defrosting mode according to the sequence, comparing the total refrigerating capacity obtained by each accumulation calculation with the total heat load of the air conditioning indoor units for heating, and stopping the accumulation calculation and controlling the air conditioning indoor units subjected to the accumulation calculation to enter the defrosting mode when the ratio of the total refrigerating capacity to the total heat load exceeds a preset energy ratio.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of a multi-split air conditioner, a readable storage medium and the multi-split air conditioner.
Background
At present, with the rapid development of multi-connected air conditioners, a plurality of hotels use one-to-many multi-connected air conditioners. The multiple on-line mode is generally that one outdoor unit is matched with a plurality of indoor units, and the indoor units are respectively supplied for each room. During defrosting of the air conditioner, the four-way valve changes the direction, and the unit is switched to a refrigeration mode. In order to prevent the influence of cold air blowing on user comfort, the indoor fans can stop running, but low-temperature refrigerants still flow through the indoor machines, the indoor machines are temporarily converted into low-temperature cold sources, the duration time is 2-4 min, the duration time is 5-7 min, and the fluctuation of indoor temperature is still caused, so that the influence on the comfort of indoor users is realized.
Disclosure of Invention
In view of the above, the invention discloses a control method of a multi-split air conditioner, a readable storage medium and the multi-split air conditioner, which are used for at least solving the problem of reduction of customer comfort when defrosting of the multi-split air conditioner.
In order to achieve the above object, the invention adopts the following technical scheme:
the invention discloses a control method of a multi-split air conditioner, which comprises the following steps:
s1, detecting the running state of each air conditioner indoor unit;
s2, dividing each air conditioner indoor unit into defrosting regulation categories according to the running state and the temperature requirement of the room corresponding to each air conditioner indoor unit;
s3, selecting and sequencing the air conditioner indoor units capable of executing the defrosting mode according to the defrosting regulation categories;
and S4, performing accumulation calculation on the refrigerating capacity of the air conditioning indoor units capable of executing the defrosting mode according to the sequence, comparing the total refrigerating capacity obtained by each accumulation calculation with the total heat load of the air conditioning indoor units for heating, and stopping the accumulation calculation and controlling the air conditioning indoor units subjected to the accumulation calculation to enter the defrosting mode when the ratio of the total refrigerating capacity to the total heat load exceeds a preset energy ratio.
Further optionally, the control method further includes:
detecting the personnel in the corresponding room according to a preset time interval;
when the number of people in the room is detected to be 0 for N times continuously, controlling the indoor unit of the air conditioner to shut down after a first preset time is reached, wherein N is a positive integer greater than or equal to 2; otherwise, controlling the indoor unit of the air conditioner to keep the current state to continuously work and continuously detect.
Further optionally, the step S4 further includes:
and after the accumulation calculation is stopped, keeping the air conditioner indoor unit which is not subjected to the accumulation calculation and/or the air conditioner indoor unit which cannot execute the defrosting mode to continuously operate or shut down in the current state.
Further optionally, the defrosting adjustment category comprises: class A, class B, class C, and class D;
a type: the temperature requirement is the air-conditioning indoor unit corresponding to the room needing to keep the indoor temperature constant;
b type: an air conditioner indoor unit which detects that a person is in a room and operates in a heating mode;
class C: detecting that no person is in the room and/or the indoor unit of the air conditioner is in a shutdown state;
and D type: an air-conditioning indoor unit in refrigerating operation.
Further optionally, the step S3 includes:
sequentially selecting air conditioner indoor units in the D type, the C type and the B type for class sorting to serve as the air conditioner indoor units capable of executing the defrosting mode;
sorting the air conditioner indoor units in the B category according to the refrigerating capacity from large to small;
sorting the air conditioner indoor units in the category C according to the refrigerating capacity from large to small;
wherein: and when the multi-split air conditioner is in the complete heating mode, the number of the air conditioner indoor units in the class D is 0.
Further optionally, the step S4 includes:
and calculating the D-type total refrigerating capacity of the air-conditioning indoor units of the D-type in the class sequencing, and controlling the air-conditioning indoor units in the D-type to keep refrigerating operation if the ratio of the D-type total refrigerating capacity to the total heat load exceeds a preset energy ratio.
Further optionally, the step S4 further includes:
if the ratio of the D-type total refrigerating capacity to the total heat load does not exceed a preset energy ratio, accumulating and calculating the C-type total refrigerating capacity of the air-conditioning indoor unit in the C-type air-conditioner according to the sequence of the refrigerating capacity from large to small, and then calculating the sum of the D-type total refrigerating capacity and the refrigerating capacity of the C-type total refrigerating capacity obtained by calculation each time of accumulation;
and if the ratio of the sum of the refrigerating capacities to the total heat load exceeds a preset energy ratio, stopping the accumulative calculation of the C-type total refrigerating capacity of the air-conditioning indoor units in the C-type category, and controlling the air-conditioning indoor units in the D-type category and the air-conditioning indoor units in the C-type category which are subjected to the accumulative calculation to enter a defrosting mode.
Further optionally, the step S4 further includes:
if the ratio of the sum of the refrigerating capacities to the total heat load does not exceed a preset energy ratio after the refrigerating capacities of all the air-conditioning indoor units in the category C are accumulated and calculated, accumulating and calculating the category B total refrigerating capacity of the air-conditioning indoor units in the category B according to the sequence of the refrigerating capacities from large to small; then, the total refrigerating capacity of the D-type total refrigerating capacity, the C-type total refrigerating capacity and the B-type total refrigerating capacity obtained by calculation each time of accumulation are obtained;
and if the ratio of the sum of the refrigerating capacities to the total heat load exceeds a preset energy ratio, stopping accumulating and calculating the B-class total refrigerating capacity of the air-conditioning indoor units in the B class, and controlling the air-conditioning indoor units in the D class, the air-conditioning indoor units in the C class and the air-conditioning indoor units in the B class which are accumulated and calculated to enter a defrosting mode.
Further optionally, the step S4 further includes:
and if the ratio of the sum of the refrigerating capacities to the total heat load does not exceed a preset energy ratio after the accumulative calculation of the refrigerating capacities of the air-conditioning indoor units capable of executing the defrosting mode is finished, controlling the air-conditioning indoor units in the category D, the air-conditioning indoor units in the category C and the air-conditioning indoor units in the category B to enter the defrosting mode, and closing the air-conditioning indoor units in the category A.
A second aspect of the invention discloses a non-transitory computer readable storage medium having stored thereon program instructions for implementing a method as described in any one of the above when the program instructions are executed by one or more processors.
A third aspect of the present invention discloses a multi-split air conditioner employing the method as described in any one of the above, or having the non-transitory computer-readable storage medium as described above.
Has the advantages that: according to the invention, by optimizing the defrosting control logic of the multi-split air conditioner, the temperature fluctuation of individual indoor (VIP important room) during defrosting is reduced to the greatest extent, the waste heat of idle rooms is fully utilized for defrosting, the comfort of the rooms in use is improved, and the defrosting is ensured to be clean.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
Fig. 1 illustrates a flow chart of a control of a multi-split air conditioner according to an embodiment;
FIG. 2 illustrates a logic diagram for an infrared system to detect a number of people in accordance with one embodiment;
FIG. 3 illustrates a logic diagram of a control method in a full heating state of an embodiment;
fig. 4 is a logic diagram of a control method in a heating state of a main body according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
At present, all heating internal machines of the existing multi-split air conditioner are switched to a defrosting mode (cooling operation) during defrosting, so that indoor temperature fluctuation is caused, and user comfort is influenced. According to the invention, through optimizing the defrosting control logic of the multi-split air conditioner, different defrosting adjusting times are set for the indoor units of the air conditioners in different rooms, so that the temperature fluctuation of individual rooms (VIP important rooms and the like) in a defrosting period is reduced to the maximum extent, the waste heat of idle rooms can be fully utilized for defrosting, and the experience effect of users is improved.
To further illustrate the technical solution of the present invention, the following specific examples are provided with reference to fig. 1 to 4.
Example 1
As shown in fig. 1, the present embodiment provides a control method of a multi-split air conditioner, the control method including:
detecting the running state of each air conditioner indoor unit;
dividing each air-conditioning indoor unit into defrosting regulation categories according to the running state and the temperature requirement of the room corresponding to each air-conditioning indoor unit;
selecting and sequencing air conditioner indoor units capable of executing a defrosting mode by combining defrosting regulation categories;
and accumulating the refrigerating capacity of the air-conditioning indoor units capable of executing the defrosting mode according to the sequence, comparing the total refrigerating capacity obtained by accumulating once with the total heat load of the air-conditioning indoor units for heating, and stopping accumulating when the ratio of the total refrigerating capacity to the total heat load exceeds a preset energy ratio and controlling the air-conditioning indoor units subjected to accumulating calculation to enter the defrosting mode.
In the embodiment, by improving the control logic of the operation modes of the internal machines of the heat recovery multi-split air conditioner during the defrosting period, and combining the operation states of all the internal machines before defrosting in advance, and determining the operation modes of the internal machines during the defrosting period according to the operation states and the refrigerating capacity of the internal machines, the temperature fluctuation of a used room is reduced to the maximum extent, meanwhile, the waste heat of an idle room is fully utilized, a proper (not more or not less) heat source is provided for defrosting, and the defrosting is ensured to be clean.
In some optional manners, the control method of the multi-split air conditioner further includes: detecting the personnel in the corresponding room by utilizing the infrared system on each air conditioner indoor unit according to a preset time interval; when the number of people in the room is detected to be 0 for N times continuously, controlling the indoor unit of the air conditioner to shut down after a first preset time is reached, wherein N is a positive integer greater than or equal to 2; otherwise, controlling the indoor unit of the air conditioner to keep the current state to continuously work and continuously detect.
Further, this embodiment adopts infrared system to monitor the personnel's condition in the indoor environment. At this time, as shown in fig. 2, the indoor unit infrared system of the multi-split air conditioner monitors indoor personnel conditions in real time and controls the operation state of the indoor unit.
(1) The infrared system feeds back the indoor personnel condition a every 0.25 h.
(2) When the number a of the indoor people at the time of T1 is not equal to 0, the system defaults that people exist in the room; the unit continues to operate by default and feeds back the indoor personnel condition a again at the next time T1(T1 ═ T1+0.25h), and the determination is made again.
(3) When the number a of indoor persons is 0 at the time of T1, the unit defaults to continue to operate and feeds back the indoor person condition a again at the next time T1(T1 is T1+0.25 h):
if a is not equal to 0, continuing to execute the logic (2);
if a is 0, the system considers that each person in the room is turned off at the time of T1(T1 is T1+0.5 h).
In the above, for example, the time interval is set to 0.25h (15min), in this case, the time interval may be set to another interval time less than 15min to shorten the determination interval, or the time interval may be set to another interval time greater than 15min to lengthen the determination interval. Similarly, the first preset time duration adopted in this implementation is 0.5h, and may be other longer time durations or shorter time durations.
In some optional manners, the control method of the multi-split air conditioner further includes: and when the ratio of the total refrigerating capacity to the total heat load exceeds a preset energy ratio, after the accumulative calculation is stopped, the air-conditioning indoor units which are not subjected to the accumulative calculation and/or the air-conditioning indoor units which cannot execute the defrosting mode keep the current state to continue to operate or shut down.
Preferably, the defrosting adjustment category in the present embodiment includes: class A, class B, class C, and class D. A type: the temperature requirement is the air-conditioning indoor unit corresponding to the room needing to keep the indoor temperature constant; b type: detecting that a person is in a room by using an infrared system on an air conditioner indoor unit and operating the air conditioner indoor unit in a heating mode; class C: detecting that no person exists in a room and/or the indoor unit of the air conditioner is in a shutdown state by using an infrared system on the indoor unit of the air conditioner; and D type: an air-conditioning indoor unit in refrigerating operation. In the defrosting regulation category, the basis of the division of the room is the importance degree of the room and the operation state of the air conditioner in the room. It should be noted that the indoor units of the air conditioners in category a obtained by the method have high importance degree of rooms, such as guest rooms in hotels, and ensure 24-hour uninterrupted air conditioning heating. The corresponding 4 types of rooms are obtained at this time, including: a type room: a room in which the indoor temperature needs to be kept constant or the outlet air temperature fluctuates in a small interval; b type room: the indoor unit detects people by infrared rays and heats a running room; class C rooms: the indoor unit detects that no person is available and the indoor unit is in a halt state all the time; a class D room: the indoor unit is in a room with refrigeration operation.
In this embodiment, selecting the air conditioning indoor units capable of executing the defrosting mode according to the category of the air conditioning indoor units, and sequencing the air conditioning indoor units according to the defrosting regulation category includes: sequentially selecting air conditioner indoor units in the D type, the C type and the B type for class sorting to serve as the air conditioner indoor units capable of executing the defrosting mode; sequencing the air-conditioning indoor units in the B category from large to small according to the refrigerating capacity, and sequentially marking as B1 and B2 … Bn (max); sorting the air-conditioning indoor units in the category C according to the refrigerating capacity from large to small, and sequentially marking as C1 and C2 … Cm (max); wherein: and when the multi-split air conditioner is in the complete heating mode, the number of the air conditioner indoor units in the class D is 0.
Further, in this embodiment, after the air conditioning indoor units capable of executing the defrosting mode are selected, in the process of determining the operation mode of each indoor unit in the defrosting period according to the operation state and the cooling capacity of each indoor unit, the total cooling capacity of class D of the air conditioning indoor units in the class sorting may be calculated first, and if the ratio of the total cooling capacity of class D to the total heat load exceeds the preset energy ratio, the air conditioning indoor units in class D are controlled to keep cooling operation.
If the ratio of the D-type total refrigerating capacity to the total heat load does not exceed the preset energy ratio, accumulating and calculating the C-type total refrigerating capacity of the air-conditioning indoor unit in the C-type air-conditioner according to the sequence of the refrigerating capacity from large to small, and then calculating the sum of the D-type total refrigerating capacity and the refrigerating capacity of the C-type total refrigerating capacity obtained by calculation each time of accumulation; and if the ratio of the sum of the refrigerating capacity to the total heat load exceeds a preset energy ratio, stopping accumulating and calculating the C-type total refrigerating capacity of the air-conditioning indoor units in the C-type category, and controlling the air-conditioning indoor units in the D-type category and the air-conditioning indoor units in the C-type category which are accumulated and calculated to enter a defrosting mode.
If the ratio of the sum of the refrigerating capacity to the total heat load does not exceed the preset energy ratio after the refrigerating capacity of all the air-conditioning indoor units in the category C is calculated in an accumulating manner, accumulating and calculating the category B total refrigerating capacity of the air-conditioning indoor units in the category B according to the sequence of the refrigerating capacity from large to small; then, the total refrigerating capacity of the D-type total refrigerating capacity, the C-type total refrigerating capacity and the B-type total refrigerating capacity obtained by calculation each time of accumulation are obtained; and if the ratio of the sum of the refrigerating capacities to the total heat load exceeds a preset energy ratio, stopping accumulating and calculating the B-class total refrigerating capacity of the air-conditioning indoor units in the B class, and controlling the air-conditioning indoor units in the D class, the air-conditioning indoor units in the C class and the air-conditioning indoor units in the B class which are accumulated and calculated to enter a defrosting mode.
Further, if the ratio of the sum of the cooling capacities to the total heat load does not exceed the preset energy ratio after the cumulative calculation of the cooling capacities of the air-conditioning indoor units capable of executing the defrosting mode is finished, the air-conditioning indoor units in the category D, the air-conditioning indoor units in the category C and the air-conditioning indoor units in the category B are controlled to enter the defrosting mode, and the air-conditioning indoor units in the category a are turned off.
Specifically, for the situation that the multi-split air conditioner in the embodiment has the modes of defrosting in the complete heating mode and defrosting in the main heating mode, a specific description is further made on the selection of the air conditioner indoor unit capable of performing defrosting and the subsequent defrosting adjustment mode for the two modes.
1) As shown in FIG. 3, the defrosting is entered into the complete heating mode (all the inner machines are in heating or shutdown state)
a. Numbering B-type indoor units according to the cooling capacity from large to small: b1, B2 … Bn (max)
b. Numbering the indoor machines in the class C rooms from large to small according to the cooling capacity: c1, C2 … Cm (max)
c. The system makes a logical decision
(1) Calculating the heat load Qh of all heating inner machines B1+ B2+ … + Bn (max) + A
Wherein A is a constant value and represents the sum of the nominal heating quantities of all the indoor units in the A-type room.
(2) Accumulating and calculating the refrigerating capacity Qc ═ Sigma Ci of the indoor unit C until K1Qc is more than K2Qh
If the current time is m (max) or less, the indoor units of the C1-Ci rooms are started to perform cooling operation until defrosting is finished, the indoor units of the Ci + 1-Cm (max) rooms continue to stand by, and the indoor units of the A and the B rooms are shut down until defrosting is finished. Wherein i is a positive integer; k1 is a cooling capacity correction coefficient: the lower the outdoor temperature, the smaller the value; k2 is the heating capacity correction coefficient: the lower the outdoor temperature, the larger the value.
If the value is not satisfied when i ═ m (max), the following determination is continued.
(3) Accumulating and calculating the refrigerating capacity Qc ═ Sigma Cm (max) +SigmaBj of the indoor machines in the type C and the type B until K is reached1Qc＞K2Qh
If j is not more than n (max), starting all the indoor units of the chamber C to perform cooling operation until defrosting is finished, switching the indoor units of the chambers B1-Bj into a defrosting mode until defrosting is finished, and shutting down the indoor units of the chamber A and the chambers Bj + 1-Bn (max) until defrosting is finished. Where j is a positive integer.
If j is not true, starting all the indoor units of the room C to perform cooling operation until defrosting is finished, switching all the indoor units of the room B to a defrosting mode until defrosting is finished, and shutting down the indoor unit A until defrosting is finished.
2) As shown in fig. 4, the main heating mode enters defrosting (most of the inner units are in heating or shutdown state, and the individual inner units are in cooling state)
(1) Calculating the heat load Qh of all heating inner machines B1+ B2+ … + Bn (max) + A
(2) Accumulating and calculating the refrigerating capacity Qc ═ Sigma Cm + SigmaD of the C-type and D-type internal machines until K1Qc＞K2Qh；
If the indoor unit I is not more than m (max), the indoor unit D keeps the refrigeration operation, the indoor units C1-Ci start the refrigeration operation until the defrosting is finished, the indoor units Ci + 1-Cm (max) continue to stand by, the indoor units A and B shut down until the defrosting is finished
If the value is not satisfied when i ═ m (max), the following determination is continued
(3) The refrigerating capacity Qc ∑ Cm (max) plus Σ D plus Σ Bj of the indoor units C, D and B (except the indoor unit A) is accumulated until K is reached1Qc＞K2Qh
If j is less than or equal to n (max), the indoor unit D keeps the refrigeration operation, the indoor unit of the chamber C is started to perform the refrigeration operation until defrosting is finished, the indoor units of the chambers B1-Bj are switched into a defrosting mode until defrosting is finished, and the indoor units A and Bj + 1-Bn (max) are shut down until defrosting is finished.
If j is not true, the indoor unit D keeps the cooling operation all the time, the indoor unit C starts the cooling operation until defrosting is finished, the indoor unit B enters a defrosting mode until defrosting is finished, and the indoor unit A shuts down until defrosting is finished.
It should be noted that in the present invention, a non-transitory computer-readable storage medium is also provided, on which program instructions are stored, and when the program instructions are executed by one or more processors, the one or more processors are used for any one of the above-mentioned control methods. The multi-split air conditioner may employ any one of the above-described control methods or have the above-described non-transitory computer-readable storage medium.
The invention adopts a heat recovery control method to defrost, can ensure the best use of energy, and minimizes the temperature fluctuation of a part of rooms with the largest heating requirement during defrosting as far as possible.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A control method of a multi-split air conditioner is characterized by comprising the following steps:
s1, detecting the running state of each air conditioner indoor unit;
s2, dividing each air conditioner indoor unit into defrosting regulation categories according to the running state and the temperature requirement of the room corresponding to each air conditioner indoor unit; wherein the defrosting adjustment categories include: class A, class B, class C, and class D; a type: the temperature requirement is the air-conditioning indoor unit corresponding to the room needing to keep the indoor temperature constant; b type: an air conditioner indoor unit which detects that a person is in a room and operates in a heating mode; class C: detecting that no person is in the room and/or the indoor unit of the air conditioner is in a shutdown state; and D type: an air-conditioning indoor unit in a refrigerating operation;
s3, selecting and sequencing the air conditioner indoor units capable of executing the defrosting mode according to the defrosting regulation categories;
and S4, performing accumulation calculation on the refrigerating capacity of the air conditioning indoor units capable of executing the defrosting mode according to the sequence, comparing the total refrigerating capacity obtained by each accumulation calculation with the total heat load of the air conditioning indoor units for heating, and stopping the accumulation calculation and controlling the air conditioning indoor units subjected to the accumulation calculation to enter the defrosting mode when the ratio of the total refrigerating capacity to the total heat load exceeds a preset energy ratio.
2. The control method of a multi-split air conditioner as set forth in claim 1, further comprising:
detecting the personnel in the corresponding room according to a preset time interval;
when the number of people in the room is detected to be 0 for N times continuously, controlling the indoor unit of the air conditioner to shut down after a first preset time is reached, wherein N is a positive integer greater than or equal to 2; otherwise, controlling the indoor unit of the air conditioner to keep the current state to continuously work and continuously detect.
3. The method of controlling a multi-split air conditioner as claimed in claim 1, wherein the step S4 further includes:
and after the accumulation calculation is stopped, keeping the air conditioner indoor unit which is not subjected to the accumulation calculation and/or the air conditioner indoor unit which cannot execute the defrosting mode to continuously operate or shut down in the current state.
4. A control method of a multi-split air conditioner according to any one of claims 1 to 3, wherein the step S3 includes:
sequentially selecting air conditioner indoor units in the D type, the C type and the B type for class sorting to serve as the air conditioner indoor units capable of executing the defrosting mode;
sorting the air conditioner indoor units in the B category according to the refrigerating capacity from large to small;
sorting the air conditioner indoor units in the category C according to the refrigerating capacity from large to small;
wherein: and when the multi-split air conditioner is in the complete heating mode, the number of the air conditioner indoor units in the class D is 0.
5. The control method of a multi-split air conditioner as set forth in claim 4, wherein the step S4 includes:
and calculating the D-type total refrigerating capacity of the air-conditioning indoor units of the D-type in the class sequencing, and controlling the air-conditioning indoor units in the D-type to keep refrigerating operation if the ratio of the D-type total refrigerating capacity to the total heat load exceeds a preset energy ratio.
6. The method of controlling a multi-split air conditioner as claimed in claim 5, wherein the step S4 further includes:
if the ratio of the D-type total refrigerating capacity to the total heat load does not exceed a preset energy ratio, accumulating and calculating the C-type total refrigerating capacity of the air-conditioning indoor unit in the C-type air-conditioner according to the sequence of the refrigerating capacity from large to small, and then calculating the sum of the D-type total refrigerating capacity and the refrigerating capacity of the C-type total refrigerating capacity obtained by calculation each time of accumulation;
and if the ratio of the sum of the refrigerating capacities to the total heat load exceeds a preset energy ratio, stopping the accumulative calculation of the C-type total refrigerating capacity of the air-conditioning indoor units in the C-type category, and controlling the air-conditioning indoor units in the D-type category and the air-conditioning indoor units in the C-type category which are subjected to the accumulative calculation to enter a defrosting mode.
7. The method of controlling a multi-split air conditioner as claimed in claim 6, wherein the step S4 further includes:
if the ratio of the sum of the refrigerating capacities to the total heat load does not exceed a preset energy ratio after the refrigerating capacities of all the air-conditioning indoor units in the category C are accumulated and calculated, accumulating and calculating the category B total refrigerating capacity of the air-conditioning indoor units in the category B according to the sequence of the refrigerating capacities from large to small; then, the total refrigerating capacity of the D-type total refrigerating capacity, the C-type total refrigerating capacity and the B-type total refrigerating capacity obtained by calculation each time of accumulation are obtained;
and if the ratio of the sum of the refrigerating capacities to the total heat load exceeds a preset energy ratio, stopping accumulating and calculating the B-class total refrigerating capacity of the air-conditioning indoor units in the B class, and controlling the air-conditioning indoor units in the D class, the air-conditioning indoor units in the C class and the air-conditioning indoor units in the B class which are accumulated and calculated to enter a defrosting mode.
8. The method of controlling a multi-split air conditioner as claimed in claim 7, wherein the step S4 further includes:
and if the ratio of the sum of the refrigerating capacities to the total heat load does not exceed a preset energy ratio after the accumulative calculation of the refrigerating capacities of the air-conditioning indoor units capable of executing the defrosting mode is finished, controlling the air-conditioning indoor units in the category D, the air-conditioning indoor units in the category C and the air-conditioning indoor units in the category B to enter the defrosting mode, and closing the air-conditioning indoor units in the category A.
9. A non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are to implement the method of any one of claims 1-8.
10. A multi-split air conditioner characterized in that it employs the method of any one of claims 1 to 8 or has the non-transitory computer-readable storage medium of claim 9.
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