Photovoltaic air conditioning and its control methods and devices

Abstract

This invention discloses a photovoltaic air conditioner and its control method and device, solving the technical problems of low compressor reliability and high system noise caused by prolonged low-frequency operation of the compressor in existing technologies. The control method includes: acquiring the current real-time output power of the photovoltaic module in the photovoltaic air conditioner and the current real-time operating power of the photovoltaic air conditioner; when the current real-time output power is less than the current real-time operating power, executing the following first control mode: acquiring the current number of frequency reduction operations; when the current number of frequency reduction operations is less than a preset threshold, acquiring the current real-time frequency of the compressor of the photovoltaic air conditioner, reducing the current real-time frequency to obtain the current actual operating frequency; determining the current intermittent operating mode corresponding to the current actual operating frequency; and controlling the operation of the photovoltaic air conditioner according to the current actual operating frequency and the current intermittent operating mode.

Description

Technical Field

[0001] This invention belongs to the field of energy-saving air conditioning technology, specifically, it relates to a photovoltaic air conditioner and its control method and control device. Background Technology

[0002] Photovoltaic air conditioning, as an energy-saving type of air conditioning, has been widely used in various fields such as production and daily life. However, because the photovoltaic modules that provide electricity in photovoltaic air conditioning are greatly affected by sunlight, the output of photovoltaic modules decreases when sunlight is insufficient. When the air conditioner relies solely on photovoltaic power, the output of photovoltaic modules may not be sufficient for the air conditioner to operate in the mode when there is sufficient electricity.

[0003] Chinese patent application CN104713176A discloses a photovoltaic air conditioning system and its control method. The control method includes: acquiring and comparing the output power of the solar cell array and the operating power of the air conditioning unit; when the output power is less than the operating power, controlling the air conditioning unit to reduce its operating power until the output power equals the operating power. While this method can keep the air conditioning unit running when the output power of the solar cell array is insufficient, it results in prolonged low-power operation when the output power fails to reach the operating power. Since the compressor is the component with the largest power consumption in the air conditioning unit, low-power operation typically requires the compressor to operate at a low frequency. Therefore, prolonged low-power operation means the compressor will continuously run at a low frequency. This prolonged low-frequency operation not only easily causes compressor wear, reducing its reliability and lifespan, but also generates significant noise and can even lead to problems such as loosening or breaking of air conditioning pipes due to the large vibrations caused by the compressor's low-frequency operation. Summary of the Invention

[0004] One of the objectives of this invention is to provide a photovoltaic air conditioning control method that solves the technical problems of low compressor reliability and high system noise caused by long-term low-frequency operation of the compressor in existing photovoltaic air conditioning control methods.

[0005] To achieve the above-mentioned objectives, the photovoltaic air conditioning control method provided by this invention adopts the following technical solution:

[0006] A photovoltaic air conditioning control method, comprising:

[0007] Obtain the current real-time output power of the photovoltaic module in the photovoltaic air conditioner and the current real-time operating power of the photovoltaic air conditioner;

[0008] When the current real-time output power is less than the current real-time operating power, the first control mode is executed;

[0009] The first control mode includes:

[0010] Get the current number of times the frequency has been reduced;

[0011] When the current number of frequency reduction operations is less than a preset threshold, the current real-time frequency of the compressor of the photovoltaic air conditioner is obtained, the current real-time frequency is reduced, and the current actual operating frequency is obtained.

[0012] Based on the correspondence between the actual operating frequency and the intermittent operating mode, the current intermittent operating mode corresponding to the current actual operating frequency is determined; the intermittent operating mode includes at least continuous operating time and downtime.

[0013] The operation of the photovoltaic air conditioner is controlled according to the current actual operating frequency and the current intermittent operating mode.

[0014] In some embodiments of this application, the first control mode further includes:

[0015] The current frequency reduction operation count is incremented by 1 and stored as the frequency reduction operation count after the photovoltaic air conditioner is turned on and started again.

[0016] In some embodiments of this application, the control method further includes:

[0017] After the downtime of the photovoltaic air conditioner after it stops according to the current intermittent operation mode reaches the current downtime in the current intermittent operation mode, the photovoltaic air conditioner is controlled to start up again, and the process of obtaining the current real-time output power and the current actual operating power and determining whether to execute the first control mode is executed again.

[0018] In some embodiments of this application, the first control mode further includes:

[0019] When the current number of frequency reduction operations is not less than the preset number threshold, the photovoltaic air conditioner is controlled to shut down.

[0020] In some embodiments of this application, the first control mode further includes:

[0021] Before shutting down the photovoltaic air conditioner, a first prompt is issued;

[0022] The first prompt includes at least a prompt for a low power protection fault and a prompt to control the photovoltaic air conditioner to restart when the set shutdown time is reached.

[0023] In some embodiments of this application, the continuous running time in the intermittent operation mode is a variable value and is determined using the following formula:

[0024] T = k1 × f + k2 × n;

[0025] Where T is the continuous running time, f is the current actual running frequency, n is the current number of frequency reduction runs, k1 is a known coefficient greater than 0, and k2 is a known coefficient less than 0.

[0026] In some embodiments of this application, the downtime in the intermittent operation mode is a variable value and is determined using the following formula:

[0027] t = k3 × n;

[0028] Where t is the downtime, n is the current number of frequency reduction operations, and k3 is a known coefficient greater than 0.

[0029] Another object of the present invention is to provide an electronic device, including a processor, a memory, and a computer program stored in the memory, wherein the processor is configured to execute the computer program to implement the above-described photovoltaic air conditioning control method.

[0030] Another object of the present invention is to provide a photovoltaic air conditioning control device, the control device comprising:

[0031] The real-time output power acquisition unit is used to acquire the current real-time output power of the photovoltaic module in the photovoltaic air conditioner.

[0032] A real-time operating power acquisition unit is used to acquire the current real-time operating power of the photovoltaic air conditioner;

[0033] The execution unit is configured to execute a first control mode at least when the current real-time output power is less than the current real-time operating power;

[0034] The first control mode includes:

[0035] Get the current number of times the frequency has been reduced;

[0036] When the current number of frequency reduction operations is less than a preset threshold, the current real-time frequency of the compressor of the photovoltaic air conditioner is obtained, the current real-time frequency is reduced, and the current actual operating frequency is obtained.

[0037] Based on the correspondence between the actual operating frequency and the intermittent operating mode, the current intermittent operating mode corresponding to the current actual operating frequency is determined; the intermittent operating mode includes at least continuous operating time and downtime.

[0038] The operation of the photovoltaic air conditioner is controlled according to the current actual operating frequency and the current intermittent operating mode.

[0039] The present invention also provides a photovoltaic air conditioner, which includes the above-mentioned photovoltaic air conditioner control device.

[0040] Compared with the prior art, the advantages and positive effects of the present invention are:

[0041] The photovoltaic air conditioner control method provided by this invention executes a first control mode when the output power of the photovoltaic module is less than the operating power of the photovoltaic air conditioner. In the first control mode, the number of frequency reduction operations is used as a parameter. When the number of frequency reduction operations is less than a preset threshold, the actual operating frequency of the compressor after frequency reduction is obtained. Then, an intermittent operation mode corresponding to the actual operating frequency is determined. The photovoltaic air conditioner is controlled based on the actual operating frequency and the intermittent operation mode. The photovoltaic air conditioner is controlled to operate at the actual operating frequency during the continuous operation time. After the continuous operation time is reached, the photovoltaic air conditioner is controlled to stop. The stop duration is the stop time preset in the intermittent operation mode. Based on the above process control of photovoltaic air conditioning, on the one hand, the compressor only reduces its frequency when the number of frequency reduction operations is less than a preset threshold. Compared with existing technologies that reduce the compressor frequency without any restrictions, this reduces the compressor's frequency reduction operation time. On the other hand, during frequency reduction operation, an intermittent operation mode corresponding to the actual operating frequency is adopted. The photovoltaic air conditioner runs for a period of time, then stops, and then restarts after a certain period of downtime. The continuous operation time and the downtime are closely related to the actual operating frequency, thus reasonably and reliably reducing the compressor's continuous low-frequency operation time. Therefore, by adjusting the compressor's low-frequency operation time with different parameters and methods, the operation of the photovoltaic air conditioner can be maintained as much as possible without causing compressor wear, reduced reliability and service life of the compressor and photovoltaic air conditioning system, excessive noise, or loosening or even breaking of air conditioning pipes caused by prolonged low-frequency operation. This achieves a balance between the reliability of photovoltaic air conditioning operation and the comfort of using the photovoltaic air conditioner.

[0042] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a flowchart of an embodiment of the photovoltaic air conditioning control method proposed in this invention;

[0045] Figure 2 This is a flowchart of another embodiment of the photovoltaic air conditioning control method proposed in this invention;

[0046] Figure 3This is a schematic diagram of the structure of an embodiment of the photovoltaic air conditioning control device proposed in this invention;

[0047] Figure 4 This is a schematic diagram of the structure of an embodiment of the electronic device proposed in this invention. Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0050] First, the technical concept of this invention will be briefly described as follows:

[0051] Photovoltaic air conditioners typically use photovoltaic (PV) modules to generate electricity to power the indoor and outdoor units of the air conditioning unit, maintaining the operation of the air conditioning system. Some PV air conditioners, in addition to using PV modules for power, are also connected to mains power. When the power output from the PV modules is insufficient, they can switch to mains power to ensure the normal operation of the air conditioning system. If the air conditioning system of a PV air conditioner only uses PV modules for power, or if it is connected to mains power but the mains power is unavailable, the PV air conditioner is an off-grid independent air conditioner. Because PV modules are greatly affected by sunlight, when sunlight is insufficient, the power output from the PV modules decreases, and the power they provide cannot meet the needs of the air conditioning system to operate in the mode when there is sufficient power. For this type of off-grid independent PV air conditioner, in order to keep the air conditioning system working, the conventional control method is to control the compressor to run at a low frequency to reduce the power required by the air conditioning unit. However, prolonged continuous low-frequency operation of the compressor not only easily causes compressor wear, reducing its reliability and service life, but also generates more noise, and may even cause problems such as loosening or breaking of air conditioning pipes due to the large vibration of the compressor during low-frequency operation. To address the technical problems of low compressor reliability and high system noise caused by prolonged low-frequency operation of the compressor in existing photovoltaic air conditioning control methods, this invention creatively proposes a new photovoltaic air conditioning control method. When the output power of the photovoltaic module is less than the operating power of the photovoltaic air conditioner, instead of controlling the compressor to operate continuously at a low frequency, the method adjusts the low-frequency operation time of the compressor by setting the number of frequency reduction operations and intermittent operation modes, and by using different parameters and methods. This avoids the compressor from operating in a low-frequency state for a long time and maintains the operation of the photovoltaic air conditioner as much as possible, thereby achieving a balance between the reliability of photovoltaic air conditioner operation and the comfort of using the photovoltaic air conditioner.

[0052] Figure 1 A flowchart of an embodiment of the photovoltaic air conditioning control method proposed in this invention is shown.

[0053] like Figure 1 As shown, this embodiment employs the following process control photovoltaic air conditioner.

[0054] S11: Obtain the current real-time output power of the photovoltaic module in the photovoltaic air conditioner and the current real-time operating power of the photovoltaic air conditioner.

[0055] The current real-time output power refers to the output power of the photovoltaic module, which is obtained in real time according to the set sampling frequency; the current real-time operating power refers to the required operating power of the photovoltaic air conditioner, which is obtained in real time according to the set sampling frequency. The methods for obtaining the output power of the photovoltaic module and the real-time operating power of the photovoltaic air conditioner are implemented using existing technologies, and will not be described in detail here.

[0056] S12: When the current real-time output power is less than the current real-time operating power, execute the first control mode.

[0057] When the current real-time output power is less than the current real-time operating power, the output power provided by the photovoltaic module cannot meet the actual power requirements of the photovoltaic air conditioner. Therefore, when powered solely by the photovoltaic module, the photovoltaic air conditioner cannot operate at the current real-time operating power. In this state, the photovoltaic air conditioner will be executed in the first control mode, specifically through control processes S12-S15.

[0058] S13: Obtain the current number of frequency reduction operations. When the number of operations is less than the preset threshold, obtain the current real-time frequency of the compressor, reduce the current real-time frequency, and obtain the current actual operating frequency.

[0059] The frequency reduction operation count is a preset parameter, and its value reflects the number of times the photovoltaic air conditioner reduces its frequency due to the current real-time output power being less than the current real-time operating power within a certain period of time. Its initial value is 0. When the condition of reducing the frequency due to the real-time output power being less than the real-time operating power is continuously met, its value will be incremented by 1 each time the condition is met; when the condition of reducing the frequency due to the real-time output power being less than the real-time operating power is not met, its count value will be reset to zero.

[0060] The current frequency reduction operation count is the value of the frequency reduction operation count obtained in real time when entering the first control mode. After obtaining the current frequency reduction operation count, it is compared with the known preset count threshold. If the current frequency reduction operation count is less than the preset count threshold, frequency reduction processing will be performed.

[0061] To perform frequency reduction, specifically, first obtain the compressor's current real-time frequency, then reduce the current real-time frequency, and determine the frequency obtained after the reduction as the current actual operating frequency.

[0062] In some embodiments, obtaining the current actual operating frequency by reducing the current real-time frequency involves determining the frequency obtained by subtracting a set frequency value from the current real-time frequency as the current actual operating frequency. The set frequency value can be a fixed frequency value or a variable frequency value.

[0063] S14: Based on the correspondence between the actual operating frequency and the intermittent operating mode, determine the current intermittent operating mode corresponding to the current actual operating frequency.

[0064] The system has a pre-defined correspondence between actual operating frequencies and intermittent operating modes, where each intermittent operating mode includes at least continuous operating time and shutdown time. The continuous operating time is the duration the photovoltaic air conditioner operates continuously after entering this intermittent operating mode. It should be understood that the photovoltaic air conditioner will shut down after the continuous operating time has elapsed. The shutdown time is the duration of shutdown after the continuous operating time has elapsed after entering this intermittent operating mode. It should be understood that the photovoltaic air conditioner will restart operation after the shutdown duration has elapsed.

[0065] The preset correspondence between actual operating frequencies and intermittent operating modes includes at least one corresponding intermittent operating mode for different actual operating frequency values, corresponding to one continuous operating time and one downtime. After obtaining the current actual operating frequency in S13, the intermittent operating mode corresponding to the current actual operating frequency can be obtained according to the preset correspondence between frequency and intermittent operating mode, and determined as the current intermittent operating mode. Then, the continuous operating time and downtime in the current intermittent operating mode are respectively determined as the current continuous operating time and the current downtime.

[0066] S15: Control the operation of the photovoltaic air conditioner according to the current actual operating frequency and the current intermittent operation mode.

[0067] Specifically, the photovoltaic air conditioner is controlled to operate at the current actual operating frequency, and the continuous operating time is the current continuous operating time; then the photovoltaic air conditioner is controlled to stop, and the stop time is the current stop time; after the stop time reaches the current stop time, the photovoltaic air conditioner is controlled to restart.

[0068] In some other embodiments, after the downtime of the photovoltaic air conditioner stops according to the current intermittent operation mode reaches the current downtime in the current intermittent operation mode, the photovoltaic air conditioner is controlled to start up. Then, the process of obtaining the current real-time output power and the current actual operating power and determining whether to execute the first control mode is executed again, so as to realize the cyclic automatic operation control of the photovoltaic air conditioner.

[0069] Figure 1The photovoltaic air conditioner control method of this embodiment executes a first control mode when the output power of the photovoltaic module is less than the operating power of the photovoltaic air conditioner. In this first control mode, the number of frequency-reduced operation cycles is used as a parameter. When the number of frequency-reduced operation cycles is less than a preset threshold, the actual operating frequency of the compressor after frequency reduction is obtained. Then, an intermittent operation mode corresponding to this actual operating frequency is determined, and the photovoltaic air conditioner is controlled based on the actual operating frequency and the intermittent operation mode. Therefore, when the output power of the photovoltaic module is less than the operating power of the photovoltaic air conditioner, the compressor is not controlled to operate continuously at a low frequency. Instead, by setting the number of frequency-reduced operation cycles and the intermittent operation mode, different parameters and methods are used to adjust the low-frequency operation time of the compressor. Based on this method of controlling photovoltaic air conditioners, on the one hand, the compressor only reduces its frequency when the number of frequency reduction operations is less than a preset threshold. Compared with existing technologies that indiscriminately reduce the compressor's frequency, this reduces the compressor's frequency reduction time. On the other hand, during frequency reduction operation, an intermittent operation mode corresponding to the actual operating frequency is adopted. The photovoltaic air conditioner runs for a period of time, then stops, and then restarts after a certain period of downtime. Furthermore, the continuous running time and downtime are closely related to the actual operating frequency, thus reasonably and reliably reducing the compressor's continuous low-frequency operation time. By adjusting the compressor's low-frequency operation time using different parameters and methods, the operation of the photovoltaic air conditioner can be maintained as much as possible without causing compressor wear, reduced reliability and lifespan of the compressor and photovoltaic air conditioning system, excessive noise, or loosening or even breakage of air conditioning pipes caused by prolonged low-frequency operation. This achieves a balance between the reliability of photovoltaic air conditioner operation and the comfort of using it.

[0070] In some embodiments, the correspondence between the actual operating frequency and the intermittent operating mode is obtained and preset by the R&D personnel based on theoretical analysis and calculation, experimental analysis and verification, etc. The continuous operating time and downtime in the preset intermittent operating mode can be fixed values.

[0071] In some other embodiments, the continuous running time and downtime in the intermittent operation mode are both variable values.

[0072] For the variable continuous operating time in intermittent operation mode, the following formula is used to determine it: T = k1 × f + k2 × n. Where T is the continuous operating time, f is the current actual operating frequency, n is the current number of frequency reduction operations, k1 is a known coefficient greater than 0, and k2 is a known coefficient less than 0. That is, the continuous operating time is jointly determined by the current actual operating frequency and the current number of frequency reduction operations, and the continuous operating time is positively correlated with the current actual operating frequency and negatively correlated with the current number of frequency reduction operations. Controlling the photovoltaic air conditioner based on this determined continuous operating time can further improve the balance between the reliability of photovoltaic air conditioner operation and the comfort of using it.

[0073] For the variable downtime in intermittent operation mode, the following formula is used to determine it: t = k3 × n. Where t is the downtime, n is the current number of frequency reduction operations, and k3 is a known coefficient greater than 0. That is, the downtime is determined based on the current number of frequency reduction operations, and the two are positively correlated. Determining the downtime in this way allows for adaptive adjustment based on the output power status of the photovoltaic modules, minimizing the low-frequency operation time of the compressor and further improving the reliability of the photovoltaic air conditioner.

[0074] Figure 2 A flowchart of another embodiment of the photovoltaic air conditioning control method proposed in this invention is shown.

[0075] like Figure 2 As shown, this embodiment employs the following process control photovoltaic air conditioner.

[0076] S21: Obtain the current real-time output power of the photovoltaic module in the photovoltaic air conditioner and the current real-time operating power of the photovoltaic air conditioner.

[0077] For the meaning and acquisition method of current real-time output power and current real-time operating power, please refer to [link / reference]. Figure 1 Description of the embodiments.

[0078] S22: When the current real-time output power is less than the current real-time operating power, execute the first control mode.

[0079] Specifically, it involves executing the control process S22-S27.

[0080] S23: Obtain the current number of times the frequency is reduced and compare it with the preset number of times threshold.

[0081] For the meaning of the current number of frequency reduction operations, please refer to [link / reference]. Figure 1 The relevant description of the embodiment. The preset number of attempts threshold is a known value.

[0082] S24: Determine whether the current number of frequency reduction operations is greater than the preset number threshold, and execute the process of S25 or S27 according to the determination result.

[0083] S25: If the result of S24 indicates that the current number of frequency reduction operations exceeds the preset threshold, then issue the first prompt. Then execute S26.

[0084] S26: Control the photovoltaic air conditioner to shut down.

[0085] If the number of times the frequency is reduced exceeds the preset threshold, it indicates that the photovoltaic air conditioner has repeatedly reduced its frequency because the current real-time output power is less than the current real-time operating power. This state indicates that the current lighting conditions are poor, and the photovoltaic module cannot provide sufficient output power in a short period of time. To protect the photovoltaic air conditioner and prevent the compressor from running at low frequency for a long time, the photovoltaic air conditioner will be shut down.

[0086] Furthermore, a first notification is issued before the photovoltaic air conditioner is shut down. This first notification includes at least a low-power protection fault warning and a notification to restart the photovoltaic air conditioner after the set shutdown time has been reached. Based on this notification, the photovoltaic air conditioner user is informed of the shutdown fault and its cause, and a possible solution is provided: restart the photovoltaic air conditioner after the set shutdown time has been reached. If the sunlight conditions improve within the set shutdown time, the photovoltaic module can provide sufficient output power.

[0087] Moreover, the first prompt is only issued when the current frequency reduction count exceeds a preset threshold, which can reduce the frequency of prompts and avoid frequent prompts that would negatively impact the user experience.

[0088] S27: If the result of S24 is that the current number of frequency reduction operations is not greater than the preset number threshold, determine the current actual operating frequency and the current intermittent operating mode; control the operation of the photovoltaic air conditioner according to the current actual operating frequency and the current intermittent operating mode; at the same time, increment the current number of frequency reduction operations by 1 and store it.

[0089] For the specific principles, implementation process, and technical effects of determining the current actual operating frequency and the current intermittent operating mode, and controlling the operation of the photovoltaic air conditioner based on the current actual operating frequency and the current intermittent operating mode, please refer to [link to relevant documentation]. Figure 1 The embodiments and other embodiments described above are further detailed. In addition, in this step, the current frequency reduction operation count is incremented by 1 and stored as the frequency reduction operation count after the next startup of the photovoltaic air conditioner, thus achieving automatic updating of the frequency reduction operation count to reflect the actual frequency reduction operation status.

[0090] In this embodiment or other embodiments, if the current real-time output power of the photovoltaic module is not less than the current real-time operating power of the photovoltaic air conditioner, the photovoltaic air conditioner is controlled to operate at the current real-time operating power without frequency reduction, and does not enter the first control mode, but is controlled according to the conventional control mode of the photovoltaic air conditioner.

[0091] Figure 3 A schematic diagram of an embodiment of the photovoltaic air conditioning control device proposed in this invention is shown, which enables the operation control of the photovoltaic air conditioner.

[0092] like Figure 3 As shown, the control device of this embodiment includes structural units, the functions of the structural units, and the relationships between them, as detailed below:

[0093] The control device includes:

[0094] The real-time output power acquisition unit 31 is used to acquire the current real-time output power of the photovoltaic module in the photovoltaic air conditioner.

[0095] The real-time operating power acquisition unit 32 is used to acquire the current real-time operating power of the photovoltaic air conditioner.

[0096] The execution unit 33 is used at least to execute the first control mode when the current real-time output power obtained by the real-time output power acquisition unit 31 is less than the current real-time operating power obtained by the real-time operating power acquisition unit 32.

[0097] The first control mode includes: obtaining the current number of frequency reduction operations; when the current number of frequency reduction operations is less than a preset threshold, obtaining the current real-time frequency of the photovoltaic air conditioner's compressor, reducing the current real-time frequency, and obtaining the current actual operating frequency; determining the current intermittent operating mode corresponding to the current actual operating frequency based on the correspondence between the actual operating frequency and the intermittent operating mode; the intermittent operating mode includes at least continuous operating time and downtime; and controlling the operation of the photovoltaic air conditioner based on the current actual operating frequency and the current intermittent operating mode.

[0098] A photovoltaic air conditioning control device with the above structure runs the corresponding software program, performs the corresponding functions, and follows the instructions. Figure 1 or Figure 2 The photovoltaic air conditioning control method and its process shown in the embodiments control the photovoltaic air conditioning to achieve the corresponding technical effects as in the method embodiments.

[0099] The photovoltaic air conditioning control device described in the above embodiment is applied to a photovoltaic air conditioner to control the photovoltaic air conditioner. It can solve the technical problems of low compressor reliability and high system noise caused by long-term low-frequency operation of the compressor in the existing photovoltaic air conditioning control method, and achieve a balance between the reliability of photovoltaic air conditioning operation and the comfort of using photovoltaic air conditioning.

[0100] Figure 4 A structural block diagram of an embodiment of the electronic device proposed in this invention is shown. The electronic device includes a processor 41, a memory 42, and a computer program 421 stored in the memory 42. The processor 41 is configured to execute the computer program 421 to implement… Figure 1 Implementation examples or Figure 2 The embodiments or other embodiments describe photovoltaic air conditioning control methods and achieve the technical effects of the corresponding embodiments. Electronic devices may include the main control board, controller, etc., of the photovoltaic air conditioning system.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A photovoltaic air conditioner control method, characterized by, The control method comprises: acquiring a current real-time output power of a photovoltaic module in a photovoltaic air conditioner and a current real-time running power of the photovoltaic air conditioner; when the current real-time output power is less than the current real-time running power, executing a first control mode; the first control mode comprises: acquiring a current frequency reduction running number; when the current frequency reduction running number is less than a preset number threshold, acquiring a current real-time frequency of a compressor of the photovoltaic air conditioner, reducing the current real-time frequency to obtain a current actual running frequency; according to a corresponding relationship between an actual running frequency and an intermittent running mode, determining a current intermittent running mode corresponding to the current actual running frequency; the intermittent running mode at least comprises a continuous running time and a shutdown time; controlling the photovoltaic air conditioner to run according to the current actual running frequency and the current intermittent running mode.

2. The photovoltaic air conditioner control method of claim 1, wherein, the first control mode further comprises: storing the current frequency reduction running number after adding 1 as a frequency reduction running number after next start of the photovoltaic air conditioner.

3. The photovoltaic air conditioner control method of claim 1, wherein, the control method further comprises: after a shutdown duration of the photovoltaic air conditioner reaching a current shutdown time in the current intermittent running mode after shutdown of the photovoltaic air conditioner according to the current intermittent running mode, controlling the photovoltaic air conditioner to start, and executing again the process of acquiring the current real-time output power and the current actual running power and determining whether to execute the first control mode.

4. The photovoltaic air conditioner control method of claim 1, wherein, the first control mode further comprises: when the current frequency reduction running number is not less than the preset number threshold, controlling the photovoltaic air conditioner to shut down.

5. The photovoltaic air conditioner control method of claim 4, wherein, the first control mode further comprises: before controlling the photovoltaic air conditioner to shut down, issuing a first prompt; the first prompt at least comprises a prompt of a low-power protection failure and a prompt of controlling the photovoltaic air conditioner to start again when a set shutdown time is reached.

6. The photovoltaic air conditioner control method according to any one of claims 1 to 5, characterized in that, the continuous running time in the intermittent running mode is a variable value and is determined by the following formula: T=k1×f+k2×n; wherein, T is the continuous running time, f is the current actual running frequency, n is the current frequency reduction running number, k1 is a known coefficient greater than 0, and k2 is a known coefficient less than 0.

7. The photovoltaic air conditioner control method according to any one of claims 1 to 5, characterized by, the shutdown time in the intermittent running mode is a variable value and is determined by the following formula: t=k3×n; wherein, t is the shutdown time, n is the current frequency reduction running number, and k3 is a known coefficient greater than 0.

8. An electronic device comprising a processor, a memory, and a computer program stored on the memory, wherein, the processor is configured to execute the computer program to implement the photovoltaic air conditioner control method in any one of claims 1-7.

9. A photovoltaic air conditioner control device, characterized by, the control device comprises: a real-time output power acquisition unit configured to acquire a current real-time output power of a photovoltaic module in a photovoltaic air conditioner; a real-time running power acquisition unit configured to acquire a current real-time running power of the photovoltaic air conditioner; an execution unit configured to execute a first control mode at least when the current real-time output power is less than the current real-time running power; the first control mode comprises: acquiring a current frequency reduction running number; When the current frequency reduction operation times is less than a preset times threshold, a current real-time frequency of a compressor of the photovoltaic air conditioner is obtained, the current real-time frequency is reduced, and a current actual operation frequency is obtained; According to a corresponding relationship between the actual operation frequency and an intermittent operation mode, a current intermittent operation mode corresponding to the current actual operation frequency is determined; the intermittent operation mode at least includes a continuous operation time and a shutdown time; The photovoltaic air conditioner is controlled to operate according to the current actual operation frequency and the current intermittent operation mode.

10. A photovoltaic air conditioner characterized by, The photovoltaic air conditioner comprises the photovoltaic air conditioner control device in claim 9.

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