Voltage fluctuation control method, medium and air conditioner control system

Abstract

The present application relates to air conditioning technical field, specifically provide a kind of voltage fluctuation control method, medium and air conditioner control system, to solve the problem of air conditioner damage due to unstable power supply voltage.It is for this purpose, the voltage fluctuation control method of the present application is applied to air conditioner control system, the air conditioner control system includes air conditioner and standby power supply, the method comprises: when the air conditioner is connected to power grid, real-time or at preset time interval obtains the grid voltage and grid voltage change rate;Based on the grid voltage, grid voltage change rate, selectively change the compressor operating frequency of air conditioner and / or switch the power supply of the air conditioner to the standby power supply, so that the standby power supply is powered to the air conditioner.Solve the problem of unstable operation, fault and even damage of air conditioner caused by power supply voltage fluctuation.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically providing a voltage fluctuation control method, a medium, and an air conditioner control system. Background Technology

[0002] With the widespread use of air conditioners globally, regions such as South Asia, Latin America, and the Middle East and Africa face problems such as unstable power supply environments and large voltage fluctuations, which can easily cause air conditioners to operate unstably, malfunction, or even be damaged.

[0003] The current mainstream solution in the market is to increase the specifications of electrical components to improve their resistance to voltage fluctuations. However, this solution can only alleviate the impact of voltage fluctuations and cannot fundamentally solve the problem. Furthermore, when voltage fluctuations are too large, even with existing solutions, air conditioners can still be damaged, affecting normal use and causing economic losses.

[0004] Accordingly, there is a need in the field for a new voltage fluctuation control scheme to solve the above problems. Summary of the Invention

[0005] To overcome the above-mentioned defects, this invention is proposed, providing a voltage fluctuation control method, a medium, and an air conditioner control system to solve or at least partially solve the technical problem of air conditioner damage caused by unstable power supply voltage.

[0006] In a first aspect, the present invention provides a voltage fluctuation control method applied to an air conditioner control system, the air conditioner control system including an air conditioner and a backup power supply, the method comprising:

[0007] When the air conditioner is connected to the power grid, the grid voltage and the grid voltage change rate are acquired in real time or at preset time intervals.

[0008] Based on the grid voltage and the grid voltage change rate, the compressor operating frequency of the air conditioner is selectively changed and / or the power supply of the air conditioner is switched to the backup power supply so that the backup power supply supplies power to the air conditioner.

[0009] In one technical solution of the above voltage fluctuation control method, the step of selectively changing the compressor operating frequency of the air conditioner and / or switching the power supply of the air conditioner to the backup power supply based on the grid voltage and the grid voltage change rate includes:

[0010] When the grid voltage is within the first preset voltage range, or when the grid voltage change rate is not lower than the preset voltage change rate threshold, the power supply of the air conditioner is switched to the backup power supply.

[0011] In one technical solution of the above voltage fluctuation control method, the method further includes: when the grid voltage is in a second preset voltage range and the grid voltage change rate is lower than a preset voltage change rate threshold, reducing the current operating frequency of the air conditioner's compressor;

[0012] The second preset voltage range is closer to the grid standard voltage than the first preset voltage range.

[0013] In one technical solution of the above voltage fluctuation control method, the method further includes obtaining the operating frequency of the air conditioner's compressor; reducing the current operating frequency of the air conditioner's compressor includes:

[0014] When the current operating frequency of the compressor is higher than the preset operating frequency threshold, the current operating frequency of the compressor is controlled to decrease by a first preset value, and the maximum operating frequency of the air conditioner compressor is set to be lower than the rated frequency.

[0015] When the current operating frequency of the compressor is not higher than the preset operating frequency threshold, the compressor of the air conditioner is controlled to operate at the lowest frequency.

[0016] In one technical solution of the above-mentioned voltage fluctuation control method, the method further includes:

[0017] If the air conditioner shuts down for protection when the current operating frequency of the compressor is not higher than the preset operating frequency threshold, the power supply of the air conditioner will be switched to the backup power supply.

[0018] In one technical solution of the above voltage fluctuation control method, the air conditioner control system further includes a power supply box, a first relay, a second relay, and a self-regulating controller. The first relay is used to connect the backup power supply and the air conditioner, and the second relay is used to connect the power supply box and the air conditioner. The power supply box is used to connect the air conditioner to the power grid. Switching the power supply of the air conditioner to the backup power supply includes:

[0019] The self-regulating controller controls the first relay, the second relay, and the backup power supply to switch the power supply of the air conditioner to the backup power supply.

[0020] In one technical solution of the above voltage fluctuation control method, the backup power source is a generator; switching the power supply of the air conditioner to the backup power source includes:

[0021] When the outdoor unit of the air conditioner is stopped, the second relay is disconnected, and the generator is started simultaneously; after a preset time, the first relay is closed, and the outdoor unit resumes operation.

[0022] When the power supply of the air conditioner is switched to the backup power supply, the indoor unit of the air conditioner will continue to operate normally without stopping.

[0023] In a second aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored, the program codes being adapted to be loaded and run by a processor to perform the voltage fluctuation control method described in any of the above-described technical solutions.

[0024] In a third aspect, an air conditioner control system is provided, comprising an air conditioner, a backup power supply, a processor, and a memory, wherein the memory is adapted to store multiple program codes, the program codes being adapted to be loaded and run by the processor to execute the voltage fluctuation control method described in any of the above-described technical solutions.

[0025] In one technical solution of the above-mentioned air conditioner control system, a power supply box, a first relay, and a second relay are also included. The first relay is used to connect the backup power supply and the air conditioner, and the second relay is used to connect the power supply box and the air conditioner. The power supply box is used to connect the air conditioner to the power grid.

[0026] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0027] In implementing the technical solution of the present invention, by selectively changing the operating frequency of the air conditioner's compressor and / or switching the air conditioner's power supply to a backup power supply, the problem of unstable operation, fault reporting, or even damage to the air conditioner caused by power supply voltage fluctuations is solved.

[0028] In implementing the technical solution of this invention, when the power supply voltage fluctuation range is small, the operating frequency of the air conditioner compressor is reduced so that the air conditioner can continue to use the power grid for power supply and operate stably; when the power supply voltage fluctuation is large, the generator power supply is switched to ensure that the air conditioner is not affected by the power grid and can operate safely and stably. Attached Figure Description

[0029] 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:

[0030] Figure 1 This is a flowchart of the main steps of a voltage fluctuation control method according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of an air conditioner control system to which the voltage fluctuation control method of one embodiment of the present invention is applied;

[0032] Figure 3 This is a detailed flowchart of a voltage fluctuation control method according to an embodiment of the present invention;

[0033] Figure 4 This is a main structural block diagram of an air conditioner control system according to an embodiment of the present invention.

[0034] List of reference numerals :

[0035] 21: Outdoor unit; 22: Generator; 23: Power supply box; 24: First relay; 25: Second relay;

[0036] 400: Air conditioner control system; 401: Air conditioner; 402: Backup power supply; 403: Processor; 404: Memory; 405: Program code. Detailed Implementation

[0037] 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.

[0038] In the description of this invention, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memory, and may also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes 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. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "a" or "this" can also include plural forms.

[0039] See appendix Figure 1 , Figure 1 This is a schematic flowchart illustrating the main steps of a voltage fluctuation control method according to an embodiment of the present invention. The voltage fluctuation control method is applied to an air conditioner control system, which includes an air conditioner and a backup power supply.

[0040] like Figure 1As shown, the voltage fluctuation control method in this embodiment of the invention mainly includes the following steps S11-S12.

[0041] Step S11: When the air conditioner is connected to the power grid, the grid voltage and the grid voltage change rate are acquired in real time or at preset time intervals.

[0042] In this embodiment, the grid voltage refers to the grid supply voltage detected in real time when the air conditioner is powered by the grid. The grid voltage change rate refers to a physical quantity representing the voltage change obtained by differentiating the grid voltage.

[0043] Step S12: Based on the grid voltage and the grid voltage change rate, selectively change the compressor operating frequency of the air conditioner and / or switch the power supply of the air conditioner to the backup power supply, so that the backup power supply supplies power to the air conditioner.

[0044] In one embodiment of the present invention, when the grid voltage is in a first preset voltage range or the grid voltage change rate is not lower than a preset voltage change rate threshold, the power supply of the air conditioner is switched to the backup power supply.

[0045] In one embodiment, if the standard grid voltage is A0, the first preset voltage range is a voltage range less than or equal to 0.7A0 or greater than or equal to 1.3A0; the preset voltage change rate threshold is 10V / min. For example, the backup power source can be a generator.

[0046] That is, when the grid voltage A and the grid voltage change rate B satisfy: A≤0.7A0 or 1.3A0≤A, or B≥10V / min, the power supply is switched to the generator.

[0047] In one embodiment of the present invention, the method further includes:

[0048] When the grid voltage is in the second preset voltage range and the grid voltage change rate is lower than the preset voltage change rate threshold, the current operating frequency of the air conditioner's compressor is reduced.

[0049] The second preset voltage range is closer to the grid standard voltage than the first preset voltage range.

[0050] In one embodiment, if the standard voltage of the power grid is A0, the second preset voltage range is a voltage range greater than 0.7A0 and less than 0.8A0 or greater than 1.2A0 and less than 1.3A0.

[0051] Furthermore, in one embodiment of the present invention, the method further includes obtaining the operating frequency of the air conditioner's compressor.

[0052] The method of reducing the current operating frequency of the compressor of the air conditioner includes: when the current operating frequency of the compressor is higher than the preset operating frequency threshold, control the current operating frequency of the compressor to decrease by a first preset value, and set the maximum operating frequency of the compressor of the air conditioner to be less than the rated frequency.

[0053] In one embodiment, the preset operating frequency threshold is 30HZ; the first preset value is 10HZ; the rated frequency is 60HZ, and the maximum operating frequency of the compressor of the air conditioner is set to 50HZ.

[0054] That is, when the grid voltage A, the grid voltage change rate B, and the compressor operating frequency C satisfy: 0.7A0 < A < 0.8A0 or 1.2A0 < A < 1.3A0, and B < 10V / min, and C > 30HZ, control the operating frequency of the compressor of the air conditioner to decrease by 10HZ, and set the maximum operating frequency of the compressor of the air conditioner to 50HZ.

[0055] If the current operating frequency of the compressor of the air conditioner does not exceed 50HZ after the operating frequency of the compressor of the air conditioner decreases by 10HZ, operate at the operating frequency of the compressor after decreasing by 10HZ; if the operating frequency of the compressor of the air conditioner is still greater than 50HZ after the operating frequency of the compressor of the air conditioner decreases by 10HZ, operate at an operating frequency of 50HZ.

[0056] When the current operating frequency of the compressor does not exceed the preset operating frequency threshold, control the compressor of the air conditioner to operate at the lowest frequency.

[0057] In one embodiment, the operating frequency of the air conditioner can be 15HZ - 130HZ, then control the compressor of the air conditioner to operate at a frequency of 15HZ.

[0058] That is, when the grid voltage A, the grid voltage change rate B, and the compressor operating frequency C satisfy: 0.7A0 < A < 0.8A0 or 1.2A0 < A < 1.3A0, and B < 10V / min, and C ≤ 30HZ, control the operating frequency of the compressor of the air conditioner to decrease to 15HZ.

[0059] Furthermore, in this embodiment, the method further includes:

[0060] When the current operating frequency of the compressor does not exceed the preset operating frequency threshold, if the air conditioner experiences protection shutdown, switch the power supply of the air conditioner to the standby power supply. Exemplarily, the standby power supply can be a generator.

[0061] In one embodiment, when the grid voltage A satisfies 0.8A0 ≤ A ≤ 1.2A0, it is considered that the power supply voltage fluctuation of the grid is within the safe range, and there is no need to change the operating frequency of the compressor of the air conditioner or switch the power supply.

[0062] In practice, the values ​​of the first preset voltage range, the second preset voltage range, the preset voltage change rate threshold, and the first preset value are not limited to the examples in the above embodiments. Those skilled in the art can set them according to actual needs.

[0063] In one embodiment, please refer to the appendix. Figure 2 The air conditioner control system further includes a power supply box 23, a first relay 24, a second relay 25, and a self-adjusting controller (not shown in the figure). The first relay 24 is used to connect the backup power supply and the air conditioner, and the second relay 24 is used to connect the power supply box 23 and the air conditioner. The power supply box 23 is used to connect the air conditioner to the power grid. Switching the power supply of the air conditioner to the backup power supply includes:

[0064] The self-regulating controller controls the first relay 24, the second relay 25, and the backup power supply to switch the power supply of the air conditioner to the backup power supply.

[0065] In one embodiment, the self-adjusting controller is installed on the outdoor unit 21 of the air conditioner, such as... Figure 2 As shown. The self-regulating controller communicates with the first relay 24, the second relay 25, and the generator 22 to control the opening and closing of the first relay 24 and the second relay 25, as well as to control the start of the generator 22, so as to switch the power supply of the air conditioner to the backup power supply.

[0066] In other embodiments of the present invention, the self-adjusting controller may not be installed on the outdoor unit 21 of the air conditioner, as long as it can perform the above-described control. Exemplarily, the self-adjusting controller may be installed on the indoor unit of the air conditioner, or it may be installed outside the air conditioner, such as in the cloud.

[0067] Specifically, the backup power source is the generator 22; the step of switching the power supply of the air conditioner 21 to the backup power source includes:

[0068] The outdoor unit of the air conditioner is shut down, the second relay 25 is disconnected, and the generator 22 is started simultaneously; after a preset time, the first relay 24 is closed, and the outdoor unit resumes operation; for example, the preset time can be 3 minutes.

[0069] When the power supply of the air conditioner 21 is switched to the backup power supply, the indoor unit of the air conditioner 21 will continue to operate normally without stopping.

[0070] The above technical solution ensures that the power grid and the backup power supply will not supply power simultaneously during the process of switching the power supply of the air conditioner to the backup power supply, thus guaranteeing the safe operation of the air conditioner.

[0071] Figure 3 This is a detailed flowchart of the voltage fluctuation control method according to an embodiment of the present invention, as shown below. Figure 3 As shown:

[0072] Step S31: Obtain the grid voltage connected to the air conditioner, and differentiate the grid voltage to obtain the grid voltage change rate;

[0073] Step S32: Obtain the operating frequency of the air conditioner's compressor;

[0074] Step S33: Based on the grid voltage, grid voltage change rate, and compressor operating frequency, a control signal is generated in the self-regulating controller. Specifically, the control signal is described in the embodiment of step S12 above.

[0075] Step S34: Based on the control signal, selectively change the compressor operating frequency of the air conditioner and / or switch the power supply of the air conditioner to the backup power supply, so that the backup power supply supplies power to the air conditioner.

[0076] Based on the above steps S11-S12, by selectively changing the compressor operating frequency of the air conditioner and / or switching the power supply of the air conditioner to a backup power supply, the problem of unstable operation, fault reporting, or even damage to the air conditioner caused by power supply voltage fluctuations is solved.

[0077] When the power supply voltage fluctuation range is small, the compressor operating frequency of the air conditioner is reduced so that the air conditioner can continue to use the power grid for power supply and operate stably; when the power supply voltage fluctuation is large, the generator power supply is switched to ensure that the air conditioner is not affected by the power grid and can operate safely and stably.

[0078] 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.

[0079] 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.

[0080] 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 that performs the voltage fluctuation control method of the above-described method embodiments. This program can be loaded and run by a processor to implement the voltage fluctuation control method 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.

[0081] Furthermore, the present invention also provides an air conditioner control system. Please refer to the appendix. Figure 4 , Figure 4 This is a main structural block diagram of an air conditioner control system used to implement the voltage fluctuation control method of the present invention.

[0082] like Figure 4 As shown, in one embodiment of the present invention, the air conditioner control system 400 includes an air conditioner 401, a backup power supply 402, a processor 403, and a memory 404. The memory 404 can be configured to store program code 405 for executing the voltage fluctuation control method of the above-described method embodiments. The processor 403 can be configured to execute the program code 405 in the memory 404. The program code 405 includes, but is not limited to, program code 405 for executing the voltage fluctuation control method of the above-described method embodiments. 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.

[0083] In one embodiment, the processor 403 includes a self-regulating controller.

[0084] In one embodiment, the air conditioner control system 400 further includes a power supply box, a first relay, and a second relay. The first relay is used to connect the backup power supply and the air conditioner, and the second relay is used to connect the power supply box and the air conditioner. The power supply box is used to connect the air conditioner to the power grid.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0086] 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 voltage fluctuation control method, applied to an air conditioner control system, characterized in that, The air conditioner control system includes an air conditioner and a backup power supply, and the method includes: When the air conditioner is connected to the power grid, the grid voltage and the grid voltage change rate are acquired in real time or at preset time intervals. Based on the grid voltage and the grid voltage change rate, the compressor operating frequency of the air conditioner is selectively changed and / or the power supply of the air conditioner is switched to the backup power supply so that the backup power supply supplies power to the air conditioner. Based on the grid voltage and the grid voltage change rate, selectively changing the compressor operating frequency of the air conditioner and / or switching the power supply of the air conditioner to the backup power supply includes: When the grid voltage is in the first preset voltage range or the grid voltage change rate is not lower than the preset voltage change rate threshold, the power supply of the air conditioner is switched to the backup power supply; when the grid voltage is in the second preset voltage range and the grid voltage change rate is lower than the preset voltage change rate threshold, the current operating frequency of the air conditioner's compressor is reduced. The second preset voltage range is closer to the grid standard voltage than the first preset voltage range.

2. The method according to claim 1, characterized in that, The method also includes obtaining the operating frequency of the air conditioner's compressor; The method of reducing the current operating frequency of the air conditioner compressor includes: when the current operating frequency of the compressor is higher than a preset operating frequency threshold, controlling the current operating frequency of the compressor to be reduced by a first preset value, and setting the maximum operating frequency of the air conditioner compressor to be lower than the rated frequency. When the current operating frequency of the compressor is not higher than the preset operating frequency threshold, the compressor of the air conditioner is controlled to operate at the lowest frequency.

3. The method according to claim 2, characterized in that, The method further includes: If the air conditioner shuts down for protection when the current operating frequency of the compressor is not higher than the preset operating frequency threshold, the power supply of the air conditioner will be switched to the backup power supply.

4. The method according to claim 1, characterized in that, The air conditioner control system further includes a power supply box, a first relay, a second relay, and a self-adjusting controller. The first relay is used to connect the backup power supply and the air conditioner. The second relay is used to connect the power supply box and the air conditioner. The power supply box is used to connect the air conditioner to the power grid. The step of switching the power supply of the air conditioner to the backup power supply includes: The self-regulating controller controls the first relay, the second relay, and the backup power supply to switch the power supply of the air conditioner to the backup power supply.

5. The method according to claim 4, characterized in that, The backup power source is a generator; the step of switching the power supply of the air conditioner to the backup power source includes: When the outdoor unit of the air conditioner is stopped, the second relay is disconnected, and the generator is started simultaneously; after a preset time, the first relay is closed, and the outdoor unit resumes operation. When the power supply of the air conditioner is switched to the backup power supply, the indoor unit of the air conditioner will continue to operate normally without stopping.

6. 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 voltage fluctuation control method according to any one of claims 1 to 5.

7. An air conditioner control system, comprising an air conditioner, a backup power supply, a processor, and a memory, wherein the memory is adapted to store multiple program codes, characterized in that, The program code is adapted to be loaded and run by the processor to perform the voltage fluctuation control method according to any one of claims 1 to 5.

8. The air conditioner control system according to claim 7, characterized in that, It also includes a power supply box, a first relay, and a second relay. The first relay is used to connect the backup power supply and the air conditioner, and the second relay is used to connect the power supply box and the air conditioner. The power supply box is used to connect the air conditioner to the power grid.

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