A multi-connection system and its rotation control method and device

Abstract

The present invention discloses a multi-split system and its rotation control method and device. The method includes: determining the outdoor unit currently at the highest priority in the multi-split system; adjusting the rotation interval according to the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system; the multi-split system rotates the priority of each outdoor unit every time the rotation interval is run. Through the present invention, the multi-split system can provide different rotation intervals for outdoor units with different installation times. The later the outdoor unit is installed, the longer it will run before being rotated under high priority conditions, thereby increasing the operating time of the newly installed outdoor unit, thereby balancing the cumulative operating time of each outdoor unit and increasing the overall life of the multi-split system.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-connected systems, and in particular to a multi-connected system and a rotation control method and device thereof. Background Art

[0002] When the indoor unit load is low, a modular multi-split system operates only some of the outdoor units. The order in which the outdoor units operate is determined by the program's established priority. To balance the operating time of each outdoor unit and ensure its overall service life, the system typically incorporates priority rotation logic. This rotates the operating priority of all outdoor units after a fixed operating time, ensuring that each outdoor unit has a similar operating time.

[0003] In phased construction, a VRF system will initially install some units and operate them, with additional units installed some time later. By this time, the first units installed have already been operating for a long time, but conventional priority rotation logic still applies the same control to both old and new units. This results in the old units operating much longer than the new ones, which is detrimental to the overall lifespan of the VRF system.

[0004] Currently, no effective solution has been proposed to the problem that the priority rotation logic of the multi-split system in the existing technology does not distinguish between new and old outdoor units, resulting in uneven operating time of each outdoor unit. Summary of the Invention

[0005] The embodiment of the present invention provides a multi-split system and its rotation control method and device to solve the problem in the prior art that the priority rotation logic of the multi-split system does not distinguish between new and old outdoor units, resulting in unbalanced operating time of each outdoor unit.

[0006] In order to solve the above technical problems, the present invention provides a rotation control method for a multi-split system, wherein the method includes: determining the outdoor unit that currently has the highest priority in the multi-split system; adjusting the rotation interval according to the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first installed outdoor unit in the multi-split system; wherein the multi-split system rotates the priority of each outdoor unit every time the rotation interval runs.

[0007] Furthermore, before adjusting the rotation interval according to the cumulative installation time of the outdoor unit, the method further includes: when each outdoor unit of the multi-split system is installed, starting a timer to record the cumulative installation time of each outdoor unit.

[0008] Furthermore, the rotation interval is adjusted based on the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first installed outdoor unit in the multi-split system, including: calculating the time difference between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the outdoor unit with the highest priority, and confirming the corresponding rotation coefficient based on the time difference; and determining the rotation interval based on the rotation coefficient.

[0009] Furthermore, the time difference between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the highest priority outdoor unit is calculated, and the corresponding rotation coefficient is confirmed based on the time difference, including: confirming the time interval in which the time difference is located; determining the corresponding rotation coefficient based on the time interval; wherein, multiple time intervals are preset, as well as the corresponding relationship between the time intervals and the rotation coefficients.

[0010] Furthermore, multiple time intervals are preset, as well as the corresponding relationship between the time intervals and the rotation coefficients, including: dividing the life cycle of the multi-connected system into n time intervals; the rotation coefficient corresponding to the first time interval is set to 1, and the rotation coefficient corresponding to the mth time interval = 1*n / (n-m+1); wherein m≤n, n and m are non-zero natural numbers.

[0011] Furthermore, the rotation interval duration is determined according to the rotation coefficient, including: the rotation interval duration = the rotation coefficient * preset time.

[0012] Furthermore, the method further includes: accumulating the accumulated operating time of each outdoor unit of the multi-split system; and adjusting the rotation interval to a preset value when the differences between the accumulated operating time of each outdoor unit are less than a preset difference.

[0013] The present invention also provides a rotation control device for a multi-split system, wherein the device includes: a determination module for determining the outdoor unit currently with the highest priority in the multi-split system; a control module for adjusting the rotation interval duration based on the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system; wherein the multi-split system rotates the priority of each outdoor unit every time the rotation interval duration runs.

[0014] The present invention also provides a multi-connected system, wherein the multi-connected system at least includes the above-mentioned rotation control device of the multi-connected system.

[0015] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the above method when executed by a processor.

[0016] By applying the technical solution of the present invention, a priority rotation control logic for outdoor units with different installation times is proposed. The multi-split system can provide different rotation intervals for outdoor units with different installation times. The later the outdoor unit is installed, the longer it will run before being rotated under high priority conditions, thereby increasing the operating time of the newly installed outdoor unit, thereby balancing the cumulative operating time of each outdoor unit and improving the overall life of the multi-split system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of a rotation control method for a multi-connected system according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the rotation control logic of the new and old outdoor units of the multi-split system according to an embodiment of the present invention;

[0019] Figure 3 is a flow chart of rotation control of new and old outdoor units of a multi-split system according to an embodiment of the present invention;

[0020] Figure 4 4 is a structural block diagram of a rotation control device for a multi-connected system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0022] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "an," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0023] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0024] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0025] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0026] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] In the conventional module rotation logic of a multi-split system, the system will start each module (outdoor unit) in order of priority until the operating load of the indoor unit is met. After a certain period of operation (t) (the rotation interval), the priority of each module will be rotated. For example, for a multi-split system with 4 modules, the initial priority order is module 1, module 2, module 3, module 4; after running for t time, the priority order becomes module 2, module 3, module 4, module 1; after running for t time again, the priority order becomes module 3, module 4, module 1, module 2; and so on.

[0029] This embodiment proposes a priority rotation control logic for outdoor units with different installation times, intelligently adjusts the above-mentioned rotation interval, and provides different rotation intervals for outdoor units with different installation times. The later the outdoor unit is installed, the longer it will run before being rotated under high priority conditions, thereby balancing the cumulative operating time of each outdoor unit.

[0030] Figure 1 FIG. 1 is a flow chart of a rotation control method for a multi-connected system according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps:

[0031] Step S101, determining the outdoor unit currently at the highest priority in the multi-split system;

[0032] Step S102, adjusting the rotation interval according to the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system; wherein, the priority of each outdoor unit is rotated every time the multi-split system runs the rotation interval.

[0033] It should be noted that the priority involved in this embodiment refers to the operating priority of the outdoor units. That is, during operation, the multi-split system determines the operating priority of each outdoor unit based on current operating requirements and the operating status of each outdoor unit. Based on the priority rotation control scheme provided in this embodiment, the multi-split system can provide different rotation intervals for outdoor units with different installation dates, increasing the operating time of newly installed outdoor units, thereby balancing the cumulative operating time of each outdoor unit and extending the overall lifespan of the multi-split system.

[0034] Because this embodiment can provide different rotation intervals for outdoor units installed at different times, a timer is started when each outdoor unit in the multi-split system is installed to record the cumulative installation time of each outdoor unit. The cumulative installation time is the time (e.g., the number of days) elapsed from the time the outdoor unit is first installed and turned on to the current time. The order in which the outdoor units are installed can be determined based on the cumulative installation time, with outdoor units installed earlier having longer cumulative installation times and those installed later having shorter cumulative installation times.

[0035] After determining the outdoor unit currently at the highest priority in the multi-split system, the rotation interval can be determined based on the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system.

[0036] Specifically, the time difference ΔXm between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the highest-priority outdoor unit is calculated. A corresponding rotation coefficient α is determined based on the time difference ΔXm. The rotation interval duration is determined based on the rotation coefficient α: rotation interval duration = rotation coefficient α * preset time t. Preferably, multiple time intervals and a corresponding relationship between the time intervals and the rotation coefficient α can be preset in advance. The time interval in which the time difference ΔXm falls is determined, and the corresponding rotation coefficient α can be determined based on the time interval.

[0037] Table 1 is a table showing the correspondence between the time difference △Xm and the rotation coefficient α.

[0038] Table 1

[0039]

[0040]

[0041] In a multi-split system, each outdoor unit is numbered (1, 2, 3, ..., n) in the order in which they were powered on. X represents the cumulative installation time of each outdoor unit, and X1, X2, ..., Xn represent the number of days from the first power-on of outdoor unit 1, outdoor unit 2, ..., outdoor unit n, respectively, with X1 ≥ X2 ≥ ... ≥ Xn. m represents the number of the outdoor unit currently with the highest priority, and Xm represents the cumulative installation time of the highest-priority outdoor unit. ΔXm = X1 - Xm. In other words, the difference between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the highest-priority outdoor unit is calculated.

[0042] A linear correspondence can also be directly set between the above-mentioned time difference △Xm and the rotation coefficient α. The larger the time difference △Xm, the larger the installation time difference between the first installed outdoor unit and the current highest priority outdoor unit. In this case, a higher rotation coefficient α is required to make the newly installed outdoor unit have more operating time and the old installed outdoor unit have less operating time, so as to balance the cumulative operating time of each outdoor unit and improve the overall life of the multi-split system.

[0043] When setting multiple time intervals, you can set them according to the life cycle of the multi-split system. For example, set the values ​​of T1, T2, and T3 (T1 < T2 < T3) according to the life cycle of the multi-split system to ensure that the cumulative operating time of the first installed outdoor unit and the last installed outdoor unit are consistent in the life cycle. The above four time intervals are just examples, and they can be further divided according to actual needs. For example, the life cycle of the multi-split system is divided into n time intervals; the rotation coefficient corresponding to the first time interval is set to 1, and the rotation coefficient corresponding to the mth time interval = 1*n / (n-m+1); where m≤n, n and m are non-zero natural numbers. Based on this, when the time difference △Xm between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the highest-priority outdoor unit is small, the corresponding rotation coefficient is also small, the rotation interval is also short, and priority rotation can be performed more quickly; when the time difference △Xm is large, the corresponding rotation coefficient is also large, the rotation interval is also long, and the operation time according to the current priority can be longer, shortening the time difference between outdoor units. The ultimate goal is to ensure that the cumulative operation time of the outdoor units over the remaining life cycle of the multi-split system is as consistent as possible. The above rotation coefficient α value is only an example and can be changed according to control needs in actual control.

[0044] In the process of balancing the accumulated running time of each outdoor unit in this embodiment, if the above-mentioned purpose has been achieved, it is no longer necessary to continue the above-mentioned rotation control method, and the priority rotation can be controlled according to the normal rotation interval duration t. Based on this, this embodiment provides a preferred implementation method, namely, accumulating the accumulated running time of each outdoor unit in the multi-connected system; when the difference between the accumulated running time of each outdoor unit is less than the preset difference (i.e., tending to be consistent), the rotation interval duration is adjusted to the preset value. Based on this, excessive rotation control can be avoided, and the gap can be avoided from widening again after the accumulated running time of each outdoor unit is balanced to be consistent.

[0045] Example 2

[0046] Figure 2 FIG. 1 is a schematic diagram of a rotation control logic of a new and old outdoor unit of a multi-split system according to an embodiment of the present invention. Figure 2 As shown, when the multi-split system is used, the outdoor units may not be installed at the same time. There are outdoor units modules that were previously installed (old modules) and there are newly installed outdoor units modules (new modules). Assuming that the multi-split system currently has an outdoor unit module installed, after the new outdoor unit module is installed in the multi-split system, it is determined whether the old module or the new module has the first priority at this time. If the old module currently has the first priority, the multi-split system will perform priority rotation after a shorter cumulative running time; if the new module currently has the first priority, the multi-split system will perform priority rotation after a longer cumulative running time. Based on the above regulation, it can be ensured that the running time of the new module accounts for a higher proportion, and eventually the old and new modules reach the unit life under the same running time, completing the life cycle of the multi-split system.

[0047] Figure 3 FIG. 1 is a flow chart of the rotation control of the new and old outdoor units of the multi-split system according to an embodiment of the present invention. Figure 3 As shown, the process includes the following steps (step S301-step S305):

[0048] Step S301, confirming the outdoor unit currently at the highest priority in the multi-split system;

[0049] Step S302, obtaining the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system;

[0050] Step S303, calculating the time difference ΔXm between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the outdoor unit with the highest priority; determining the corresponding rotation coefficient α according to the time difference ΔXm;

[0051] Step S304, rotation interval length = rotation coefficient α*preset time t;

[0052] Step S305: After the multi-split system runs for a rotation interval, the priority of each outdoor unit is rotated. The rotation rule may be: the outdoor unit with the highest priority is set to the lowest priority, and the outdoor units with other priorities are moved up one priority level in sequence.

[0053] Under the control method of this embodiment, the earliest installed outdoor unit module, when designated as the first-priority module, will rotate to the lowest-priority module after operating for a full t period. Later installed outdoor units, when designated as the first-priority module, will need to operate longer before being rotated to the lowest-priority module. This ultimately balances the cumulative operating time of each outdoor unit and improves the overall lifespan of the multi-split system.

[0054] Example 3

[0055] Corresponding to Figure 1 The present embodiment provides a rotation control device for a multi-connected system. Figure 4 The structural block diagram of the rotation control device of the multi-connected system shown in FIG.

[0056] A determination module 10 is used to determine the outdoor unit currently at the highest priority in the multi-split system;

[0057] The control module 20 is configured to adjust the rotation interval according to the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system;

[0058] Among them, the multi-split system rotates the priority of each outdoor unit every time the rotation interval lasts.

[0059] The rotation control device of the multi-split system of this embodiment can provide different rotation intervals for outdoor units with different installation times. The later the outdoor unit is installed, the longer it will run before being rotated under high priority conditions, thereby increasing the operating time of the newly installed outdoor unit, thereby balancing the cumulative operating time of each outdoor unit and increasing the overall life of the multi-split system.

[0060] This embodiment further provides a multi-split system, which includes at least the aforementioned rotation control device for the multi-split system. Specific application solutions of the aforementioned rotation control device for the multi-split system have been described in detail above and will not be repeated here.

[0061] Example 4

[0062] An embodiment of the present invention provides a software for executing the technical solutions described in the above embodiment and preferred implementation manner.

[0063] An embodiment of the present invention provides a non-volatile computer storage medium storing computer executable instructions. The computer executable instructions can execute the rotation control method of the multi-connected system in any of the above method embodiments.

[0064] The above-mentioned software is stored in the above-mentioned storage medium, which includes but is not limited to: a CD, a floppy disk, a hard disk, a rewritable memory, etc.

[0065] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0066] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0067] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rotation control method for a multi-connected system, characterized in that: The method comprises: Determine the outdoor unit with the highest priority in the multi-split system; Adjusting the rotation interval according to the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system; the method comprising: calculating the time difference between the cumulative installation time of the first outdoor unit installed and the cumulative installation time of the outdoor unit with the highest priority, determining a corresponding rotation coefficient according to the time difference; and determining the rotation interval according to the rotation coefficient; The multi-connected system rotates the priority of each outdoor unit every time it runs for the rotation interval.

2. The method according to claim 1, characterized in that Before adjusting the rotation interval according to the cumulative installation time of the outdoor unit, the method further includes: When each outdoor unit of the multi-split system is installed, a timer is started to record the cumulative installation time of each outdoor unit.

3. The method according to claim 1, characterized in that Calculating the time difference between the cumulative installation time of the first installed outdoor unit and the cumulative installation time of the outdoor unit with the highest priority, and determining a corresponding rotation coefficient based on the time difference, including: confirming the time interval within which the time difference falls; Determine a corresponding rotation coefficient according to the time interval; There are preset multiple time intervals, and corresponding relationships between the time intervals and the rotation coefficients.

4. The method according to claim 3, characterized in that There are multiple preset time intervals, and the corresponding relationship between the time intervals and the rotation coefficients, including: Dividing the life cycle of the multi-connected system into n time intervals; The rotation coefficient corresponding to the first time interval is set to 1, and the rotation coefficient corresponding to the mth time interval is set to 1*n / (n-m+1); where m≤n, and n and m are non-zero natural numbers.

5. The method according to claim 1, wherein Determining the rotation interval duration according to the rotation coefficient includes: The rotation interval length=the rotation coefficient*preset time.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: accumulating the cumulative operating time of each outdoor unit of the multi-split system; When the differences between the accumulated operating times of the outdoor units are all smaller than the preset differences, the rotation interval is adjusted to a preset value.

7. A rotation control device for a multi-connected system, characterized in that: The device comprises: A determination module, used to determine the outdoor unit currently at the highest priority in the multi-split system; a control module configured to adjust the rotation interval duration based on the cumulative installation time of the outdoor unit with the highest priority and the cumulative installation time of the first outdoor unit installed in the multi-split system; the control module comprising: calculating a time difference between the cumulative installation time of the first outdoor unit installed and the cumulative installation time of the outdoor unit with the highest priority, determining a corresponding rotation coefficient based on the time difference; and determining the rotation interval duration based on the rotation coefficient; The multi-connected system rotates the priority of each outdoor unit every time it runs for the rotation interval.

8. A multi-connection system, characterized in that: The multi-connected system at least includes the rotation control device of the multi-connected system according to claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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