Compressor operation control method, device, equipment and medium of multi-connected air conditioner

Abstract

This invention relates to the field of multi-split air conditioning technology, specifically providing a compressor operation control method for multi-split air conditioners, aiming to solve the problem of excessive compressor operating frequency during operation. To this end, the multi-split air conditioner of this invention includes an outdoor unit and multiple indoor units. The compressor operation method includes: determining the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature; determining the maximum operating frequency of the compressor based on the maximum allowable load rate; comparing the actual operating frequency of the compressor with the maximum operating frequency; if the actual operating frequency is less than or equal to the maximum operating frequency, controlling the compressor to operate at the actual operating frequency; if the actual operating frequency is greater than the maximum operating frequency, controlling the compressor to operate at the maximum operating frequency. This method effectively prevents excessive compressor operating frequency during operation of the multi-split air conditioner, avoiding a reduction in the service life of the multi-split air conditioner.

Description

Technical Field

[0001] This invention relates to the field of multi-split air conditioning technology, specifically providing a compressor operation control method, device, electronic equipment, and computer-readable storage medium for multi-split air conditioning. Background Technology

[0002] Multi-split air conditioners consist of multiple indoor and outdoor units connected together. During operation, the compressor's output frequency is controlled based on the system's target evaporation and condensation temperatures. However, when heating, if the ambient temperature is low and the indoor units are operating at a low rate, the target condensation temperature may be high, leading to excessive compressor operation and poor energy efficiency. Alternatively, the compressor's output frequency may be controlled using a fuzzy logic lookup table based on the indoor unit load, without considering the indoor unit load ratio or ambient temperature requirements. This results in excessive compressor operation under low load and low ambient temperature, causing over-output operation, excessive power consumption, and further reducing the air conditioner's lifespan.

[0003] Accordingly, there is a need in the field for a new operation control scheme for the compressor of a multi-split air conditioner to solve the above problems. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide a compressor operation control method, device, equipment and medium for multi-split air conditioners that solves or at least partially solves the technical problem of excessive compressor operating frequency during operation.

[0005] In a first aspect, the present invention provides a compressor operation control method for a multi-split air conditioner, the multi-split air conditioner including an outdoor unit and multiple indoor units, the method comprising: determining the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature; determining the maximum operating frequency of the compressor based on the maximum allowable load rate; comparing the actual operating frequency of the compressor with the maximum operating frequency; if the actual operating frequency is less than or equal to the maximum operating frequency, controlling the compressor to operate at the actual operating frequency; if the actual operating frequency is greater than the maximum operating frequency, controlling the compressor to operate at the maximum operating frequency.

[0006] In one technical solution of the compressor operation control method for the aforementioned multi-split air conditioner, the step of "determining the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature" specifically includes: determining the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature using the following formula:

[0007]

[0008] Wherein, Y1 represents the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is running in cooling mode, X1 represents the operating load rate of the indoor unit when the multi-split air conditioner is running in cooling mode, Tao1 represents the outdoor ambient temperature when the multi-split air conditioner is running in cooling mode, c1 represents the cooling ambient temperature threshold, and a1, b1 and d1 represent preset constant coefficients.

[0009] In one technical solution of the compressor operation control method for the aforementioned multi-split air conditioner, the step of "determining the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature" specifically includes: determining the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature using the following formula:

[0010]

[0011] Wherein, Y2 represents the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is running in heating mode, X2 represents the operating load rate of the indoor unit when the multi-split air conditioner is running in heating mode, Tao2 represents the outdoor ambient temperature when the multi-split air conditioner is running in heating mode, c2 represents the heating ambient temperature threshold, and a2, b2 and d2 represent preset constant coefficients.

[0012] In one technical solution of the compressor operation control method of the above-mentioned multi-split air conditioner, a1 equals 0.12, b1 equals 1.5, c1 equals 35, and d1 equals 20.

[0013] In one technical solution of the compressor operation control method of the above-mentioned multi-split air conditioner, a2 equals 0.15, b2 equals 1.5, c2 equals 7, and d2 equals 40.

[0014] In one technical solution of the compressor operation control method of the above-mentioned multi-split air conditioner, the method further includes obtaining the operating load rate of the indoor unit by the following means: obtaining the load value of each indoor unit in the operating state, and taking the sum of the load values ​​as the operating load value; calculating the ratio of the operating load value to the preset total load of the indoor units to obtain the operating load rate of the indoor unit.

[0015] In one technical solution of the compressor operation control method for the aforementioned multi-split air conditioner, after the step of "calculating the ratio of the start-up load value to the preset total load of the indoor unit to obtain the start-up load rate of the indoor unit", the method further includes: comparing the start-up load rate, a first load rate upper limit value, and a load rate lower limit value; if the start-up load rate is less than the load rate lower limit value, then the start-up load rate is set to the aforementioned load rate lower limit value; if the start-up load rate is greater than the first load rate upper limit value, then the start-up load rate is set to the aforementioned first load rate upper limit value; if the start-up load rate is greater than or equal to the load rate lower limit value and less than or equal to the first load rate upper limit value, then the start-up load rate is not adjusted.

[0016] In one technical solution of the compressor operation control method for the aforementioned multi-split air conditioner, after the step of "determining the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature", the method further includes: comparing the maximum allowable load rate with a second upper limit value; if the maximum allowable load rate is greater than the second upper limit value, then setting the maximum allowable load rate to the second upper limit value; if the maximum allowable load rate is less than or equal to the second upper limit value, then not adjusting the maximum allowable load rate.

[0017] In a second aspect, the present invention provides a compressor operation control device for a multi-split air conditioner, the multi-split air conditioner including an outdoor unit and multiple indoor units, the device comprising: a first determining module configured to determine the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature; a second determining module configured to determine the maximum operating frequency of the compressor based on the maximum allowable load rate; a comparison module configured to compare the actual operating frequency of the compressor with the maximum operating frequency; and a control module configured to control the compressor to operate at the actual operating frequency if the actual operating frequency is less than or equal to the maximum operating frequency, and to control the compressor to operate at the maximum operating frequency if the actual operating frequency is greater than the maximum operating frequency.

[0018] In a third aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored therein, the program codes being adapted to be loaded and executed by a processor to perform the compressor operation control method for a multi-split air conditioner as described in any of the above-described technical solutions.

[0019] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0020] In implementing the technical solution of this invention, by determining the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature, and then determining the maximum operating frequency of the compressor based on the maximum allowable load rate, the maximum operating frequency of the compressor can be accurately obtained, increasing the accuracy of obtaining the maximum operating frequency. By comparing the actual operating frequency of the compressor with the maximum operating frequency, if the actual operating frequency is less than or equal to the maximum operating frequency, the compressor is controlled to operate at the actual operating frequency; if the actual operating frequency is greater than the maximum operating frequency, the compressor is controlled to operate at the maximum operating frequency. This accurately controls the actual operating frequency of the indoor unit's compressor to remain below the maximum operating frequency, effectively preventing the compressor from operating too frequently during the operation of the multi-split air conditioner, further significantly reducing the consumption of the air conditioning system, thereby increasing the service life of the multi-split air conditioner and improving the user experience. Attached Figure Description

[0021] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0022] Figure 1 This is a schematic flowchart of the main steps of a compressor operation control method for a multi-split air conditioner according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic flowchart of the main steps of a compressor operation control method for a multi-split air conditioner according to another embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the main structure of a compressor operation control device for a multi-split air conditioner according to an embodiment of the present invention.

[0025] List of reference numerals :

[0026] 11: First determination module; 12: Second determination module; 13: Comparison module; 14: Control module. Detailed Implementation

[0027] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] In the description of this invention, "module" and "processor" can include hardware, software, or a combination of both. A module may include hardware circuitry, various suitable sensors, communication ports, and memory, and may also include software components, such as program code, or a combination of software and hardware. A processor may be a central processing unit, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor may be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media include any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc.

[0029] See appendix Figure 1 , Figure 1 This is a schematic flowchart illustrating the main steps of a compressor operation control method for a multi-split air conditioner according to an embodiment of the present invention. The multi-split air conditioner includes an outdoor unit and multiple indoor units, such as... Figure 1 As shown, the compressor operation control method of the multi-split air conditioner in this embodiment of the invention mainly includes the following steps S101-S105.

[0030] Step S101: Determine the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature.

[0031] In this embodiment, the indoor unit's operating load rate refers to the ratio of the sum of the load values ​​of all indoor units of the multi-split air conditioner when they are in operation to the preset total load of the indoor units.

[0032] The outdoor ambient temperature can be obtained by installing a temperature sensor in the outdoor unit of the multi-split air conditioner. In practical applications, the appropriate method for obtaining the outdoor ambient temperature can be determined according to the actual application conditions, and no single method is specified here.

[0033] In one implementation, when the multi-split air conditioner is in cooling mode, the maximum allowable load rate of the outdoor unit can be determined based on the indoor unit's operating load rate and the outdoor ambient temperature using the following formula:

[0034]

[0035] Where Y1 represents the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is operating in cooling mode, X1 represents the operating load rate of the indoor unit when the multi-split air conditioner is operating in cooling mode, Tao1 represents the outdoor ambient temperature when the multi-split air conditioner is operating in cooling mode, c1 represents the cooling ambient temperature threshold, and a1, b1, and d1 represent preset constant coefficients. Preferably, in this embodiment of the invention, a1 equals 0.12, b1 equals 1.5, c1 equals 35, and d1 equals 20; when the multi-split air conditioner is in heating mode, the maximum allowable load rate of the outdoor unit can be determined based on the operating load rate of the indoor unit and the outdoor ambient temperature using the following formula:

[0036]

[0037] Wherein, Y2 represents the maximum allowable load rate of the outdoor unit of the multi-split air conditioner when operating in heating mode, X2 represents the operating load rate of the indoor unit of the multi-split air conditioner when operating in heating mode, Tao2 represents the outdoor ambient temperature of the multi-split air conditioner when operating in heating mode, c2 represents the heating ambient temperature threshold, and a2, b2, and d2 represent preset constant coefficients. Preferably, in this embodiment of the invention, a2 equals 0.15, b2 equals 1.5, c2 equals 7, and d2 equals 40.

[0038] To illustrate the above implementation method, suppose the preset total load of the multi-split air conditioner is 10 indoor units, and 4 indoor units are currently running. When the multi-split air conditioner is in cooling mode, the outdoor ambient temperature Tao1 = 32℃, and the indoor unit's operating load rate X1 = 4 / 10 = 0.4, then the maximum allowable load rate of the outdoor unit is:

[0039]

[0040] When a multi-split air conditioner is in heating mode, the outdoor ambient temperature is Tao2 = (-12)℃, and the indoor unit's operating load rate is X1 = 4 / 10 = 0.4. Therefore, the maximum allowable load rate of the outdoor unit is:

[0041]

[0042] It should be noted that the calculation result of the maximum allowable load rate of the outdoor unit can be retained to 0-5 decimal places. Preferably, the calculation result of the maximum allowable load rate of the outdoor unit in this embodiment of the invention is retained to 2 decimal places.

[0043] The preset total load of the indoor units is the sum of the pre-set load values ​​of all indoor units of the multi-split air conditioner.

[0044] Step S102: Determine the maximum operating frequency of the compressor based on the maximum allowable load rate.

[0045] In this embodiment, the maximum operating frequency of the compressor refers to the upper limit of the operating frequency after the compressor has been running for a period of time.

[0046] In one embodiment, the maximum operating frequency of the compressor can be determined based on the maximum allowable load rate and the compressor's preset rated operating frequency. Specifically, the maximum operating frequency is the product of the maximum allowable load rate and the preset rated operating frequency. For example, if the preset rated operating frequency is 50 Hz, when the multi-split air conditioner is in cooling mode, and the maximum allowable load rate of the outdoor unit calculated above is 0.64, then the maximum operating frequency of the compressor = 0.64 × 50 = 32 Hz; when the multi-split air conditioner is in heating mode, and the maximum allowable load rate of the outdoor unit calculated above is 0.97, then the maximum operating frequency of the compressor = 0.97 × 50 = 48.5 Hz.

[0047] It should be noted that the preset rated operating frequency of the compressor can be the operating frequency obtained by those skilled in the art based on experimental data, or it can be the operating frequency obtained by those skilled in the art after adjusting the preset rated operating frequency according to actual needs. The embodiments of the present invention do not limit this.

[0048] Step S103: Determine whether the actual operating frequency of the compressor is greater than the maximum operating frequency. If it is greater, proceed to step S104; if it is less than or equal to, proceed to step S105.

[0049] Step S104: Control the compressor to operate at the maximum operating frequency.

[0050] Step S105: Control the compressor to operate at the actual operating frequency.

[0051] Based on steps S101-S105 above, by determining the maximum allowable load rate of the outdoor unit according to the indoor unit's operating load rate and the outdoor ambient temperature, and then determining the compressor's maximum operating frequency based on the maximum allowable load rate, the maximum operating frequency of the compressor can be accurately obtained, increasing the accuracy of obtaining the maximum operating frequency. By comparing the compressor's actual operating frequency with the maximum operating frequency, if the actual operating frequency is less than or equal to the maximum operating frequency, the compressor is controlled to operate at the actual operating frequency; if the actual operating frequency is greater than the maximum operating frequency, the compressor is controlled to operate at the maximum operating frequency. This accurately controls the actual operating frequency of the indoor unit's compressor to remain below the maximum operating frequency, effectively preventing the compressor from operating too frequently during the operation of the multi-split air conditioner, further significantly reducing the consumption of the air conditioning system, thereby increasing the service life of the multi-split air conditioner and improving the user experience.

[0052] See appendix Figure 2 , Figure 2This is a schematic flowchart illustrating the main steps of a compressor operation control method for a multi-split air conditioner according to another embodiment of the present invention. The multi-split air conditioner includes an outdoor unit and multiple indoor units, such as... Figure 2 As shown, the compressor operation control method of the multi-split air conditioner in this embodiment of the invention mainly includes the following steps S201-S215.

[0053] Step S201: Obtain the load value of each indoor unit that is in the power-on state, and use the sum of the load values ​​as the power-on load value.

[0054] In this embodiment, the power-on status of each indoor unit can be obtained separately, the load values ​​of all indoor units in the power-on state can be summed, and the calculated result can be used as the power-on load value.

[0055] Step S202: Calculate the ratio of the start-up load value to the preset total load of the indoor unit to obtain the start-up load rate of the indoor unit.

[0056] In this embodiment, the preset total load of the indoor units is the sum of the load values ​​of all indoor units of the multi-split air conditioner. The preset total load of the indoor units can be preset by those skilled in the art according to actual needs, or it can be the total load obtained by those skilled in the art after adjusting the preset total load of the indoor units according to actual needs. This embodiment of the invention does not limit this.

[0057] The calculation result of the start-up load rate can be retained to 0-5 decimal places. Preferably, the calculation result of the start-up load rate in this embodiment of the invention is retained to 2 decimal places.

[0058] Step S203: Determine whether the start-up load rate is less than the lower limit of the load rate. If yes, proceed to step S204; otherwise, proceed to step S205.

[0059] Step S204: Set the start-up load rate to the lower limit of the load rate.

[0060] Step S205: Determine whether the start-up load rate is greater than the first load rate upper limit. If yes, proceed to step S206; otherwise, proceed to step S207.

[0061] Step S206: Set the start-up load rate to the first load rate upper limit value.

[0062] Step S207: Do not adjust the start-up load rate.

[0063] In steps S203 to S207, the lower limit of the load rate and the upper limit of the first load rate are both preset minimum and maximum boundary values ​​used to determine the start-up load rate. The upper limit of the load rate and the lower limit of the first load rate can both be values ​​obtained by those skilled in the art based on experimental data, or values ​​obtained by those skilled in the art after adjusting the preset values ​​according to actual needs. This embodiment of the invention does not impose any limitations on this. Preferably, in this embodiment of the invention, the lower limit of the load rate is 0.01, the upper limit of the first load rate is 0.6 when the multi-split air conditioner is operating in cooling mode, and the upper limit of the first load rate is 1 when the multi-split air conditioner is operating in heating mode.

[0064] For example, if the operating load rate is 0.4, then the lower limit of the load rate when the multi-split air conditioner is running in cooling mode is 0.01, and the upper limit of the first load rate is 0.6. Since the operating load rate is greater than the lower limit but less than the upper limit, no adjustment is needed, and the operating load rate remains 0.4. If the operating load rate is 0.8, then it is greater than both the lower limit and the upper limit. Therefore, setting the operating load rate to the upper limit results in an operating load rate of 0.6. Similarly, the method for determining the operating load rate when the multi-split air conditioner is running in heating mode is the same as that for cooling mode, and will not be repeated here.

[0065] Step S208: Determine the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature.

[0066] In this embodiment, the method for determining the maximum allowable load rate of the outdoor unit is the same as that in step S101 above, and will not be repeated here.

[0067] Step S209: Determine whether the maximum allowable load rate is greater than the upper limit of the second load rate. If yes, proceed to step S210; otherwise, proceed to step S211.

[0068] Step S210: Set the maximum allowable load rate to the second upper limit of the load rate.

[0069] Step S211: Do not adjust the maximum allowable load rate.

[0070] In steps S209 to S211, the second load rate upper limit is a pre-set maximum boundary value used to determine the maximum allowable load rate of the outdoor unit. The second load rate upper limit can be a value obtained by those skilled in the art based on experimental data, or it can be a value obtained by those skilled in the art after adjusting a pre-set value according to actual needs. This embodiment of the invention does not impose any limitations on this. Preferably, in this embodiment of the invention, the second load rate upper limit is 1.

[0071] For example, if the maximum allowable load rate is 0.98, which is less than the upper limit of the second load rate, then without adjusting the maximum allowable load rate, the maximum allowable load rate will remain at 0.98. If the maximum allowable load rate is 1.98, which is greater than the upper limit of the second load rate, then by setting the maximum allowable load rate to the upper limit of the second load rate, the maximum allowable load rate will be 1.

[0072] Step S212: Determine the maximum operating frequency of the compressor based on the maximum allowable load rate.

[0073] In this embodiment, the method for determining the maximum operating frequency is the same as that in step S102 above, and will not be repeated here.

[0074] Step S213: Determine whether the actual operating frequency of the compressor is less than or equal to the maximum operating frequency. If yes, proceed to step S214; otherwise, proceed to step S215.

[0075] Step S214: Control the compressor to operate at the actual operating frequency.

[0076] Step S215: Control the compressor to operate at the maximum operating frequency.

[0077] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0078] Furthermore, the present invention also provides a compressor operation control device for a multi-split air conditioner.

[0079] See appendix Figure 3 , Figure 3 This is a main structural block diagram of a compressor operation control device for a multi-split air conditioner according to an embodiment of the present invention. The multi-split air conditioner includes an outdoor unit and multiple indoor units, such as... Figure 3As shown, the compressor operation control device of the multi-split air conditioner in this embodiment of the invention mainly includes a first determining module 11, a second determining module 12, a comparison module 13, and a control module 14. In some embodiments, one or more of the first determining module 11, the second determining module 12, the comparison module 13, and the control module 14 can be combined into a single module. In some embodiments, the first determining module 11 can be configured to determine the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature. The second determining module 12 can be configured to determine the maximum operating frequency of the compressor based on the maximum allowable load rate. The comparison module 13 can be configured to compare the actual operating frequency of the compressor with the maximum operating frequency. The control module 14 can be configured to control the compressor to operate at the actual operating frequency if the actual operating frequency is less than or equal to the maximum operating frequency; and to control the compressor to operate at the maximum operating frequency if the actual operating frequency is greater than the maximum operating frequency. In one embodiment, a description of the specific functions can be found in steps S101 to S105.

[0080] The compressor operation control device of the aforementioned multi-split air conditioner is used to execute... Figure 1 The embodiments of the compressor operation control method for multi-split air conditioners shown are similar in technical principle, the technical problems solved, and the technical effects produced. Those skilled in the art can clearly understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the compressor operation control device for multi-split air conditioners can be found in the embodiments of the compressor operation control method for multi-split air conditioners, and will not be repeated here.

[0081] Those skilled in the art will understand that all or part of the processes in the method of the above embodiment of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included in the computer-readable storage medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0082] Furthermore, the present invention also provides a computer-readable storage medium. In one embodiment of the computer-readable storage medium according to the present invention, the computer-readable storage medium can be configured to store a program for executing the compressor operation control method of a multi-split air conditioner according to the above-described method embodiments. This program can be loaded and run by a processor to implement the compressor operation control method of the multi-split air conditioner described above. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The computer-readable storage medium can be a storage device comprising various electronic devices. Optionally, in the embodiments of the present invention, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0083] Furthermore, it should be understood that since the various modules are only provided to illustrate the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the processor's software, hardware, or a combination of software and hardware. Therefore, the number of modules shown in the figures is merely illustrative.

[0084] Those skilled in the art will understand that the various modules in the device can be adaptively split or combined. Such splitting or combining of specific modules will not cause the technical solution to deviate from the principles of the present invention; therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

[0085] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A compressor operation control method for a multi-split air conditioner, wherein the multi-split air conditioner includes an outdoor unit and multiple indoor units, characterized in that, The method includes: The maximum allowable load rate of the outdoor unit is determined based on the indoor unit's operating load rate and the outdoor ambient temperature. The maximum operating frequency of the compressor is determined based on the maximum allowable load rate; the product of the maximum allowable load rate and the preset rated operating frequency of the compressor is taken as the maximum operating frequency of the compressor. The actual operating frequency of the compressor is compared with the maximum operating frequency; If the actual operating frequency is less than or equal to the maximum operating frequency, then the compressor is controlled to operate at the actual operating frequency. If the actual operating frequency is greater than the maximum operating frequency, then the compressor is controlled to operate at the maximum operating frequency; The determination of the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature specifically includes: The maximum allowable load rate of the outdoor unit is determined based on the indoor unit's operating load rate and the outdoor ambient temperature using the following formula: in, This indicates the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is operating in cooling mode. This indicates the operating load rate of the indoor unit when the multi-split air conditioner is operating in cooling mode. This indicates the outdoor ambient temperature when the multi-split air conditioner is operating in cooling mode. Indicates the temperature threshold of the cooling environment. , and These represent the preset constant coefficients; The maximum allowable load rate of the outdoor unit is determined based on the indoor unit's operating load rate and the outdoor ambient temperature using the following formula: in, This indicates the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is operating in heating mode. This indicates the operating load rate of the indoor unit when the multi-split air conditioner is operating in heating mode. This indicates the outdoor ambient temperature when the multi-split air conditioner is operating in heating mode. Indicates the heating environment temperature threshold. , and These represent the preset constant coefficients.

2. The compressor operation control method for a multi-split air conditioner according to claim 1, characterized in that, The Equal to 0.12, the Equal to 1.5, the stated Equal to 35, the stated It equals 20.

3. The compressor operation control method for a multi-split air conditioner according to claim 1, characterized in that, The Equal to 0.15, the Equal to 1.5, the stated Equal to 7, the It equals 40.

4. The compressor operation control method for a multi-split air conditioner according to claim 1, characterized in that, The method further includes obtaining the operating load rate of the indoor unit through the following means: Obtain the load value of each indoor unit that is in the power-on state, and use the sum of the load values ​​as the power-on load value; The ratio of the operating load value to the preset total load of the indoor unit is calculated to obtain the operating load rate of the indoor unit.

5. The compressor operation control method according to claim 4, characterized in that, After the step of "calculating the ratio of the operating load value to the preset total load of the indoor unit to obtain the operating load rate of the indoor unit", the method further includes: The start-up load rate, the upper limit of the first load rate, and the lower limit of the load rate are compared; If the startup load rate is less than the lower limit of the load rate, then the startup load rate is set to the lower limit of the load rate. If the startup load rate is greater than the first load rate upper limit, then the startup load rate is set to the aforementioned first load rate upper limit. If the operating load rate is greater than or equal to the lower limit of the load rate and less than or equal to the upper limit of the first load rate, then the operating load rate will not be adjusted.

6. The compressor operation control method for a multi-split air conditioner according to claim 1, characterized in that, After the step of "determining the maximum allowable load rate of the outdoor unit based on the indoor unit's operating load rate and the outdoor ambient temperature", the method further includes: The maximum allowable load rate and the upper limit of the second load rate are compared; If the maximum allowable load rate is greater than the upper limit of the second load rate, then the maximum allowable load rate is set to the upper limit of the second load rate. If the maximum allowable load rate is less than or equal to the upper limit of the second load rate, then the maximum allowable load rate will not be adjusted.

7. A compressor operation control device for a multi-split air conditioner, the multi-split air conditioner comprising an outdoor unit and multiple indoor units, characterized in that, The device includes: The first determining module is configured to determine the maximum allowable load rate of the outdoor unit based on the operating load rate of the indoor unit and the outdoor ambient temperature; specifically, the configuration is as follows: the maximum allowable load rate of the outdoor unit is determined based on the operating load rate of the indoor unit and the outdoor ambient temperature using the following formula: in, This indicates the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is operating in cooling mode. This indicates the operating load rate of the indoor unit when the multi-split air conditioner is operating in cooling mode. This indicates the outdoor ambient temperature when the multi-split air conditioner is operating in cooling mode. Indicates the temperature threshold of the cooling environment. , and These represent the preset constant coefficients; The maximum allowable load rate of the outdoor unit is determined based on the indoor unit's operating load rate and the outdoor ambient temperature using the following formula: in, This indicates the maximum allowable load rate of the outdoor unit when the multi-split air conditioner is operating in heating mode. This indicates the operating load rate of the indoor unit when the multi-split air conditioner is operating in heating mode. This indicates the outdoor ambient temperature when the multi-split air conditioner is operating in heating mode. Indicates the heating environment temperature threshold. , and These represent the preset constant coefficients; The second determining module is configured to determine the maximum operating frequency of the compressor based on the maximum allowable load rate; and to use the product of the maximum allowable load rate and the preset rated operating frequency of the compressor as the maximum operating frequency of the compressor. A comparison module is configured to compare the actual operating frequency of the compressor with the maximum operating frequency; The control module is configured to control the compressor to operate at the actual operating frequency if the actual operating frequency is less than or equal to the maximum operating frequency, and to control the compressor to operate at the maximum operating frequency if the actual operating frequency is greater than the maximum operating frequency.

8. A computer-readable storage medium storing a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by a processor to perform the compressor operation control method for a multi-split air conditioner according to any one of claims 1 to 6.

Images