Refrigeration control method and device, air conditioner and storage medium

Abstract

The invention discloses a refrigeration control method and device, an air conditioner and a storage medium, the refrigeration control method is applied to the air conditioner, the air conditioner comprises an outer fan and a compressor, and in the refrigeration mode operation process, operation parameter information is obtained; and if it is determined that the outer fan is in an unsmooth air outlet state according to the operation parameter information, the rotating speed of the outer fan is adjusted in a preset mode, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule, and the air outlet speed of the outer fan is adjusted by obtaining the operation parameter information in the refrigeration mode operation process. According to the technical scheme, whether the outer fan is in the unsmooth air outlet state or not can be determined in time, and when the outer fan is in the unsmooth air outlet state, the rotating speed of the outer fan and / or the frequency of the compressor are / is adjusted, so that the influence of unsmooth air outlet of the outer fan on the refrigeration effect is avoided, and related user complaints are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a refrigeration control method, device, air conditioner and storage medium. Background Art

[0002] At present, due to the aesthetic requirements of urban building exterior walls, more and more air-conditioning outdoor units are installed in grilles. At the same time, the grilles on the market vary greatly. Some grilles will cause serious problems with the outdoor unit's air outlet being blocked, resulting in increased temperature inside the grille and poor outdoor heat exchange. Research has found that when the air conditioner is installed in a grille, or other improper installation operations occur, it is easy to cause the air outlet of the air conditioner's outdoor unit to be blocked, resulting in poor outdoor heat exchange, which in turn affects the air conditioning's cooling effect.

[0003] Therefore, it is necessary to propose a solution to improve the cooling effect of the air conditioner when the outdoor unit is in a state of poor air outlet.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a refrigeration control method, device, air conditioner and storage medium, aiming to improve the refrigeration effect of the air conditioner when the outdoor unit is in a state of poor air flow.

[0006] To achieve the above object, the present invention provides a refrigeration control method, which is applied to an air conditioner, the air conditioner includes an outdoor fan and a compressor, and the refrigeration control method includes:

[0007] During the operation of the cooling mode, obtaining the operation parameter information;

[0008] If it is determined according to the operating parameter information that the external fan is in a state of poor air flow, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule.

[0009] Optionally, the step of obtaining operating parameter information includes:

[0010] Collecting a first outdoor ambient temperature and a second outdoor ambient temperature corresponding to the external fan through a temperature sensor; and / or collecting a first pressure value and a second pressure value corresponding to the external fan through a pressure sensor;

[0011] taking at least one of the first outdoor environment temperature, the second outdoor environment temperature, the first pressure value, and the second pressure value as the operation parameter information;

[0012] The first outdoor ambient temperature and the second outdoor ambient temperature are collected at a time interval of a first preset time, and the first pressure value and the second pressure value are collected at a time interval of a first preset distance.

[0013] Optionally, the step of adjusting the rotation speed of the external fan in a preset manner includes:

[0014] Obtaining an actual speed corresponding to the external fan, and increasing the actual speed according to a preset speed increment; and / or,

[0015] The actual speed, actual power and target air volume corresponding to the external fan are obtained, and the actual speed of the external fan is controlled according to the actual speed, actual power and target air volume.

[0016] Optionally, the step of controlling the actual speed of the external fan according to the actual speed, actual power and target air volume includes:

[0017] Determine the target power corresponding to the target air volume according to the actual rotation speed and the target air volume;

[0018] When the power difference between the actual power and the target power is not within the initial difference range, obtaining a control time and a speed step corresponding to the power difference;

[0019] After the control time period, the actual speed is adjusted according to the speed step size.

[0020] Optionally, the step of controlling the frequency of the compressor based on a preset compressor frequency control rule comprises:

[0021] Obtaining the current outdoor ambient temperature corresponding to the external fan;

[0022] Matching the current frequency limit value corresponding to the current outdoor ambient temperature according to a preset temperature frequency limit value comparison table;

[0023] The operating frequency of the compressor is controlled according to the current frequency limit value based on the compressor frequency control rule.

[0024] Optionally, the step of controlling the operating frequency of the compressor according to the current frequency limit value based on the compressor frequency control rule includes:

[0025] Counting the fluctuation value of the current frequency limit value occurring within a preset number of times, and determining whether the fluctuation value exceeds a preset fluctuation threshold;

[0026] If the fluctuation value exceeds the preset fluctuation threshold, the target frequency of the current compressor is determined and operated according to the current frequency limit value corresponding to the last time the current frequency limit was exited. If the current frequency limit occurs again during the operation, return to execute the step of determining the target frequency of the current compressor and operating according to the current frequency limit value corresponding to the last time the current frequency limit was exited and subsequent steps until the current frequency limit no longer occurs.

[0027] Optionally, before the step of determining according to the operating parameter information that the external fan is in a state of poor air flow, the step further includes:

[0028] Calculating temperature difference data according to the first outdoor ambient temperature and the second outdoor ambient temperature, and determining whether the temperature difference data is less than a preset temperature difference threshold; and / or calculating pressure difference data according to the first pressure value and the second pressure value, and determining whether the pressure difference data is less than a preset pressure difference threshold;

[0029] If the temperature difference data is not less than a preset temperature difference threshold, or the pressure difference data is not less than a preset pressure difference threshold, it is determined that the external fan is in a state of poor air outlet.

[0030] In addition, to achieve the above-mentioned purpose, the present invention further provides a refrigeration control device, which is applied to an air conditioner, the air conditioner includes an outdoor fan and a compressor, and the refrigeration control device includes:

[0031] An acquisition module is used to acquire operation parameter information during the operation of the cooling mode;

[0032] The adjustment module is used to adjust the rotation speed of the external fan in a preset manner if it is determined according to the operating parameter information that the external fan is in a state of poor air flow, and / or to control the frequency of the compressor based on a preset compressor frequency control rule.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also provides an air conditioner, which includes a memory, a processor, and a refrigeration control program stored in the memory and executable on the processor, and the refrigeration control program implements the steps of the refrigeration control method described above when executed by the processor.

[0034] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer-readable storage medium, on which a refrigeration control program is stored, and when the refrigeration control program is executed by a processor, the steps of the refrigeration control method as described above are implemented.

[0035] A refrigeration control method, device, air conditioner and storage medium proposed in an embodiment of the present invention obtain operating parameter information during the operation of the refrigeration mode; if it is determined according to the operating parameter information that the external fan is in a state of poor air outlet, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule. By obtaining the operating parameter information during the operation of the refrigeration mode, it is possible to promptly determine whether the external fan is in a state of poor air outlet, and when the external fan is in a state of poor air outlet, the rotation speed of the external fan and / or the frequency of the compressor are adjusted, thereby avoiding the influence of the poor air outlet of the external fan on the refrigeration effect, thereby reducing related user complaints. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the functional modules of the air conditioner to which the refrigeration control device of the present invention belongs;

[0037] Figure 2 A schematic flow chart of an exemplary embodiment of a refrigeration control method of the present invention;

[0038] Figure 3 for Figure 2 A schematic diagram of a specific process of step S10 in the embodiment;

[0039] Figure 4 is a flow chart of another exemplary embodiment of a refrigeration control method of the present invention;

[0040] Figure 5 It is a logic diagram for judging poor air flow in an embodiment of the present invention;

[0041] Figure 6 for Figure 2 A schematic diagram of a specific process of step S20 in the embodiment.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] The main solution of the embodiment of the present invention is: by obtaining operating parameter information during the operation of the refrigeration mode; if it is determined according to the operating parameter information that the external fan is in a state of poor air outlet, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule. By obtaining the operating parameter information during the operation of the refrigeration mode, it is possible to promptly determine whether the external fan is in a state of poor air outlet, and when the external fan is in a state of poor air outlet, the rotation speed of the external fan and / or the frequency of the compressor are adjusted, thereby avoiding the influence of the poor air outlet of the external fan on the refrigeration effect, thereby reducing related user complaints.

[0045] Technical terms involved in the embodiments of the present invention:

[0046] T4: outdoor ambient temperature;

[0047] T4start0: T4 temperature when starting up;

[0048] T4start5: T4 temperature 5 minutes after startup.

[0049] Due to the current aesthetic requirements for urban building exterior walls, more and more household air conditioner outdoor units are installed in grilles. At the same time, the grilles on the market vary greatly. Some grilles can cause serious problems with outdoor unit air outlet, resulting in increased temperature inside the grille and poor outdoor heat exchange. Research has found that when the air conditioner is installed in a grille, or due to other improper installation reasons, it usually leads to poor outdoor air outlet, resulting in poor outdoor heat exchange, which is also the key reason for the current market complaints about poor refrigeration effects.

[0050] At present, air conditioners run at the corresponding set frequency by detecting the outdoor T4 ambient temperature. Because the air conditioner outdoor unit is installed in the grille or in an environment where the air flow is not smooth, the heat dissipation is poor in this environment, and the temperature detected by T4 will be 10-15℃ higher than the actual ambient temperature, which will cause the detected T4 temperature to be in a fluctuating state. Due to different current limits in different temperature ranges, the air conditioner operating frequency is unstable or has been running at a very low frequency, which will cause poor cooling effect.

[0051] The present invention provides a solution, and proposes a control method for improving the refrigeration effect in an environment where the air outlet of an external fan is not smooth, so as to avoid the influence of the refrigeration effect on the refrigeration effect caused by the poor air outlet of the external fan, thereby reducing related market complaints.

[0052] Specifically, refer to Figure 1 , Figure 1This is a functional module diagram of the air conditioner to which the refrigeration control device of the present invention belongs. The refrigeration control device can be a device that is independent of the air conditioner and can perform refrigeration control, and it can be carried on the air conditioner in the form of hardware or software. The air conditioner can be controlled by a smart mobile terminal with data processing function such as a mobile phone or a tablet computer, and can also be controlled by a fixed terminal device or server with data processing function.

[0053] In this embodiment, the air conditioner to which the refrigeration control device belongs includes at least an output module 110 , a processor 120 , a memory 130 and a communication module 140 .

[0054] The memory 130 stores an operating system and a refrigeration control program. The refrigeration control device can store information such as operating parameter information obtained during the operation of the refrigeration mode in the memory 130. The output module 110 can be a display screen, etc. The communication module 140 can include a WIFI module, a mobile communication module, and a Bluetooth module, etc., and communicates with an external device or server through the communication module 140.

[0055] When the refrigeration control program in the memory 130 is executed by the processor, the following steps are implemented:

[0056] During the operation of the cooling mode, obtaining the operation parameter information;

[0057] If it is determined according to the operating parameter information that the external fan is in a state of poor air flow, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule.

[0058] Furthermore, when the refrigeration control program in the memory 130 is executed by the processor, the following steps are also implemented:

[0059] Collecting a first outdoor ambient temperature and a second outdoor ambient temperature corresponding to the external fan through a temperature sensor; and / or collecting a first pressure value and a second pressure value corresponding to the external fan through a pressure sensor;

[0060] taking at least one of the first outdoor environment temperature, the second outdoor environment temperature, the first pressure value, and the second pressure value as the operation parameter information;

[0061] The first outdoor ambient temperature and the second outdoor ambient temperature are collected at a time interval of a first preset time, and the first pressure value and the second pressure value are collected at a time interval of a first preset distance.

[0062] Furthermore, when the refrigeration control program in the memory 130 is executed by the processor, the following steps are also implemented:

[0063] Obtaining an actual speed corresponding to the external fan, and increasing the actual speed according to a preset speed increment; and / or,

[0064] The actual speed, actual power and target air volume corresponding to the external fan are obtained, and the actual speed of the external fan is controlled according to the actual speed, actual power and target air volume.

[0065] Furthermore, when the refrigeration control program in the memory 130 is executed by the processor, the following steps are also implemented:

[0066] Determine the target power corresponding to the target air volume according to the actual rotation speed and the target air volume;

[0067] When the power difference between the actual power and the target power is not within the initial difference range, obtaining a control time and a speed step corresponding to the power difference;

[0068] After the control time period, the actual speed is adjusted according to the speed step size.

[0069] Furthermore, when the refrigeration control program in the memory 130 is executed by the processor, the following steps are also implemented:

[0070] Obtaining the current outdoor ambient temperature corresponding to the external fan;

[0071] Matching the current frequency limit value corresponding to the current outdoor ambient temperature according to a preset temperature frequency limit value comparison table;

[0072] The operating frequency of the compressor is controlled according to the current frequency limit value based on the compressor frequency control rule.

[0073] Furthermore, when the refrigeration control program in the memory 130 is executed by the processor, the following steps are also implemented:

[0074] Counting the fluctuation value of the current frequency limit value occurring within a preset number of times, and determining whether the fluctuation value exceeds a preset fluctuation threshold;

[0075] If the fluctuation value exceeds the preset fluctuation threshold, the target frequency of the current compressor is determined and operated according to the current frequency limit value corresponding to the last time the current frequency limit was exited. If the current frequency limit occurs again during the operation, return to execute the step of determining the target frequency of the current compressor and operating according to the current frequency limit value corresponding to the last time the current frequency limit was exited and subsequent steps until the current frequency limit no longer occurs.

[0076] Furthermore, when the refrigeration control program in the memory 130 is executed by the processor, the following steps are also implemented:

[0077] Calculating temperature difference data according to the first outdoor ambient temperature and the second outdoor ambient temperature, and determining whether the temperature difference data is less than a preset temperature difference threshold; and / or calculating pressure difference data according to the first pressure value and the second pressure value, and determining whether the pressure difference data is less than a preset pressure difference threshold;

[0078] If the temperature difference data is not less than a preset temperature difference threshold, or the pressure difference data is not less than a preset pressure difference threshold, it is determined that the external fan is in a state of poor air outlet.

[0079] This embodiment adopts the above scheme, specifically by obtaining the operating parameter information during the operation of the cooling mode; if it is determined according to the operating parameter information that the external fan is in a state of poor air outlet, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule. By obtaining the operating parameter information during the operation of the cooling mode, it is possible to timely determine whether the external fan is in a state of poor air outlet, and when the external fan is in a state of poor air outlet, the rotation speed of the external fan and / or the frequency of the compressor are adjusted, thereby avoiding the influence of the poor air outlet of the external fan on the cooling effect, thereby reducing related user complaints.

[0080] Based on the above architecture but not limited to the above architecture, an embodiment of the method of the present invention is proposed.

[0081] The execution subject of the method of this embodiment may be a refrigeration control device or an air conditioner, etc. This embodiment takes a refrigeration control device as an example.

[0082] Reference Figure 2 , Figure 2 The flowchart of an exemplary embodiment of the refrigeration control method of the present invention is shown in FIG. The refrigeration control method is applied to an air conditioner, the air conditioner includes an outdoor fan and a compressor, and the refrigeration control method includes:

[0083] Step S10, obtaining operation parameter information during the cooling mode operation;

[0084] Specifically, the refrigeration mode operation process in the embodiment of the present invention includes the process of starting the refrigeration mode after receiving the refrigeration mode operation instruction, and being in the refrigeration state. The operating parameter information obtained during the refrigeration mode operation process includes the operating parameters recorded when the refrigeration mode is started, and may also include the operating parameters recorded after a certain interval of time.

[0085] Optionally, operating parameter information can be obtained through pre-installed sensors. For example, the outdoor ambient temperature can be collected through a temperature sensor, and the pressure value at the external fan outlet can be collected through a pressure sensor. Based on the operating parameter information of the external fan, it can be determined whether the external fan is installed in an environment with poor air outlet, or whether there is any foreign object blocking the external fan, causing the external fan to be in a state of poor air outlet, and then corresponding processing can be performed.

[0086] Step S20: If it is determined according to the operating parameter information that the external fan is in a state of poor air flow, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule.

[0087] Specifically, since the outdoor fans of air conditioners are mostly installed in grilles and the production standards of grilles are not unified, some grilles will cause serious problems with the outdoor fans' air outlet being blocked, resulting in increased temperature inside the grilles and poor outdoor heat exchange effects, etc., or due to other improper installation reasons, the outdoor unit will usually also have poor air outlet, resulting in poor outdoor heat exchange effects.

[0088] Optionally, after obtaining the operating parameter information during the operation of the cooling mode, it can be determined whether the external fan is in a state of poor air outlet based on the operating parameter information.

[0089] Optionally, in the embodiment of the present invention, the state of the external fan is judged by considering the temperature change during the operation of the cooling mode, for example, by calculating the difference between the outdoor ambient temperature when the machine is turned on and the outdoor ambient temperature after the cooling mode is operated for several minutes, and comparing the difference with the temperature difference value measured in advance through experiments. If the difference exceeds the temperature difference value measured in advance through experiments, it can be said that the temperature rise is abnormal, that is, the external fan has a problem of poor air discharge. Among them, the temperature difference value measured in the experiment is the change value of the outdoor ambient temperature after the external fan is started and operates normally for several minutes.

[0090] Optionally, the embodiment of the present invention also considers judging the state of the external fan by the pressure change of the air outlet during the operation of the cooling mode, for example, by calculating the difference in pressure at different positions of the air outlet of the external fan, and comparing the difference with the pressure difference value measured in advance by experiment, if the difference exceeds the pressure difference value measured in advance by experiment, it can be said that the pressure change is abnormal, that is, the external fan has a problem of poor air outlet. The pressure difference value measured in the experiment is the pressure change value of the corresponding position under the normal operation of the external fan.

[0091] Optionally, if it is determined that the external fan is in a state of poor air discharge, the rotation speed of the external fan may be adjusted in a preset manner, and / or the frequency of the compressor may be controlled based on a preset compressor frequency control rule.

[0092] Optionally, when the external fan is in a state of poor air output, the heat dissipation effect can be improved by increasing the speed by a certain number of revolutions over the original speed in the cooling mode (the increased speed cannot exceed the upper limit speed allowed by the motor).

[0093] Optionally, when the outdoor fan is in a state of poor air output, the corresponding motor speed can be increased through electronic control logic to achieve the effect of outdoor constant air volume.

[0094] Optionally, when the outdoor fan is in a state of poor air output, the frequency of the compressor can also be controlled by a new compressor frequency linear control logic to ensure stable operation of the outdoor compressor frequency.

[0095] In this embodiment, during the operation of the refrigeration mode, operating parameter information is obtained; if it is determined according to the operating parameter information that the external fan is in a state of poor air outlet, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule. By obtaining the operating parameter information during the operation of the refrigeration mode, it is possible to promptly determine whether the external fan is in a state of poor air outlet, and when the external fan is in a state of poor air outlet, the rotation speed of the external fan and / or the frequency of the compressor are adjusted, thereby avoiding the influence of the poor air outlet of the external fan on the refrigeration effect, thereby reducing related user complaints.

[0096] Reference Figure 3 , Figure 3 for Figure 2 The specific flow chart of step S10 in the embodiment. Figure 2 In the embodiment shown, in this embodiment, the above step S10 includes:

[0097] Step S101, collecting a first outdoor ambient temperature and a second outdoor ambient temperature corresponding to the external fan through a temperature sensor; and / or collecting a first pressure value and a second pressure value corresponding to the external fan through a pressure sensor;

[0098] Step S102: taking at least one of the first outdoor ambient temperature, the second outdoor ambient temperature, the first pressure value, and the second pressure value as the operating parameter information.

[0099] Optionally, the collection time interval of the first outdoor ambient temperature and the second outdoor ambient temperature is a first preset time, and the collection positions of the first pressure value and the second pressure value are separated by a first preset distance.

[0100] Specifically, the operating parameter information can be obtained through the pre-installed sensors. For example, the outdoor ambient temperature can be collected through the temperature sensor, and the pressure value of the external fan outlet can be collected through the pressure sensor. According to the operating parameter information of the external fan, it can be determined whether the external fan is in a state of poor air outlet, and then corresponding processing can be performed. It should be noted that the outdoor ambient temperature in the embodiment of the present invention is the ambient temperature near the air outlet of the external fan.

[0101] Optionally, in an embodiment of the present invention, the outdoor ambient temperature T4 at the time of startup is recorded as T4start0, that is, the first outdoor ambient temperature; the outdoor ambient temperature T4 when the cooling mode runs for the first preset time (for example, 5 minutes) is recorded as T4start5, that is, the second outdoor ambient temperature, and then the difference between the two is calculated, that is, the value of T4start5-T4start0, and then the difference is compared with the temperature difference value measured in advance through experiments to determine whether the external fan is in a state of poor air flow.

[0102] Optionally, in an embodiment of the present invention, the P4 pressure value at the first position closest to the air outlet is recorded as P4start0, that is, the first pressure value; the P4 pressure value at the second position at a first preset distance (for example, 5 cm) from the first position is recorded as P4start5, that is, the second pressure value, and then the difference between the two is calculated, that is, the value of P4start5-P4start0, and then the difference is compared with the pressure difference value measured in advance through experiments to determine whether the external fan is in a state of poor air outlet.

[0103] Optionally, in an embodiment of the present invention, the pressure value measured at a preset distance from the air outlet can be compared with a standard pressure value measured in advance at the position. If the deviation between the measured pressure value and the standard pressure value exceeds a predetermined range, it can also indicate that the external fan is in a state of poor air outlet.

[0104] This embodiment adopts the above scheme, specifically collecting the first outdoor ambient temperature and the second outdoor ambient temperature corresponding to the external fan through a temperature sensor; and / or collecting the first pressure value and the second pressure value corresponding to the external fan through a pressure sensor; taking at least one of the first outdoor ambient temperature, the second outdoor ambient temperature, the first pressure value and the second pressure value as the operating parameter information, and providing a variety of parameters for judging the operating status of the external fan, so as to timely identify whether the external fan is in a state of poor air outlet, so as to perform corresponding processing in time, so as to improve the cooling effect in the state of poor air outlet.

[0105] Reference Figure 4 , Figure 4 This is a flow chart of another exemplary embodiment of the refrigeration control method of the present invention. Figure 2In the embodiment shown, in this embodiment, before step S20, the anti-condensation control method further includes:

[0106] Determine whether the external fan is in a state of poor air flow based on the operating parameter information, including:

[0107] Step S001, calculating temperature difference data according to the first outdoor ambient temperature and the second outdoor ambient temperature, and determining whether the temperature difference data is less than a preset temperature difference threshold; and / or calculating pressure difference data according to the first pressure value and the second pressure value, and determining whether the pressure difference data is less than a preset pressure difference threshold;

[0108] Step S002: If the temperature difference data is not less than a preset temperature difference threshold, or the pressure difference data is not less than a preset pressure difference threshold, it is determined that the external fan is in a state of poor air flow.

[0109] Reference Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the judgment logic of poor air flow in an embodiment of the present invention, such as Figure 5 As shown, by detecting the outdoor ambient temperature when the machine is turned on and after running for several minutes, it can be determined whether to enter the logic of the poor air outlet of the outdoor fan. Specifically, as in the above embodiment, the outdoor ambient temperature T4 when the machine is turned on is used as the first outdoor ambient temperature (T4start0); the outdoor ambient temperature T4 when the cooling mode runs for 5 minutes is used as the second outdoor ambient temperature (T4start5), and then the difference between the two, that is, the value of T4start5-T4start0, is calculated, and then the difference is compared with the temperature difference value measured in advance through experiments. When T4start5-T4start0≥8℃, it is determined that the air outlet of the outdoor unit is poor, and the logic of the poor air outlet control function of the outdoor unit is entered. When T4start5-T4start0<8℃, it is operated according to the conventional logic, wherein 8℃ is the temperature difference threshold measured by experiments in the embodiment of the present invention, and can be adjusted according to actual conditions in other embodiments.

[0110] Similarly, in an embodiment of the present invention, the difference P4start5-P4start0 between the first pressure value (P4start0) at the first position closest to the air outlet and the second pressure value (P4start5) P4 at the second position at a first preset distance from the first position can be calculated, and then the difference can be compared with the pressure difference value measured in advance through experiments to determine whether the external fan is in a state of poor air outlet.

[0111] Optionally, the pressure value P1 measured at a preset distance from the air outlet can be compared with the standard pressure value P0 measured in advance at the position. If the deviation between the measured pressure value and the standard pressure value exceeds a predetermined range, it can also indicate that the external fan is in a state of poor air outlet.

[0112] Optionally, after determining that the external fan is in a state of poor air outlet, corresponding prompt information, such as voice information or text information, can also be generated to inform the user through the control terminal that the external fan is in a state of poor air outlet, so that the user can deal with it according to the cause of the poor air outlet, such as adjusting the installation method, adjusting the grille and other obstructions, thereby directly solving the problem of poor air outlet from the external fan.

[0113] This embodiment adopts the above scheme, specifically by calculating temperature difference data according to the first outdoor ambient temperature and the second outdoor ambient temperature, and judging whether the temperature difference data is less than a preset temperature difference threshold; and / or, calculating pressure difference data according to the first pressure value and the second pressure value, and judging whether the pressure difference data is less than a preset pressure difference threshold; if the temperature difference data is not less than the preset temperature difference threshold, or the pressure difference data is not less than the preset pressure difference threshold, it is judged that the external fan is in a state of poor air outlet, and a plurality of ways of judging whether the external fan is in a state of poor air outlet are provided, so as to timely identify whether the external fan is in a state of poor air outlet, so as to timely perform corresponding processing, so as to improve the cooling effect in the state of poor air outlet.

[0114] Reference Figure 6 , Figure 6 for Figure 2 The specific flow chart of step S20 in the embodiment. Figure 2 In the embodiment shown, in this embodiment, the above step S20 includes:

[0115] Step S201, adjusting the rotation speed of the external fan in a preset manner; and / or,

[0116] Step S202: controlling the frequency of the compressor based on a preset compressor frequency control rule.

[0117] Specifically, the air conditioning compressor is usually driven by a motor, and its operating frequency is controlled to achieve the target frequency. The relationship between the actual frequency and the target frequency is very important for the performance and efficiency of the air conditioning system. The target frequency is the desired operating frequency set according to the needs of the air conditioning system. It is usually determined based on the required cooling or heating capacity and the current load. The target frequency can be set by a controller or speed regulator in the control system. The actual frequency is the current operating frequency of the air conditioning compressor, which is adjusted by the motor controller or inverter to achieve the target frequency. The actual frequency will be adjusted as the load, indoor temperature and other environmental factors change to ensure stable operation of the system under different conditions.

[0118] Optionally, the air conditioner in the embodiment of the present invention uses variable frequency drive technology, which means that the operating frequency of the motor can be adjusted as needed to adapt to changing conditions. This can improve the energy efficiency of the system because the motor does not need to run at the highest frequency all the time, but can reduce the frequency when needed to save energy. Under high load conditions, the actual frequency is usually close to the target frequency to provide maximum cooling or heating capacity. Under low load conditions, the actual frequency can be reduced to reduce energy consumption while still maintaining a stable indoor temperature.

[0119] Optionally, before performing the cooling control method, the embodiment of the present invention further analyzes the capacity difference of the air conditioner installed before and after the grille, specifically including:

[0120] First observe the operating status of the existing machine after installing the grille:

[0121] In the free cooling condition, the outdoor unit has 35 / 24 hours and the indoor unit has 27 / 19 hours. The grille is placed on the outdoor unit (the front grille is opened) for testing. The unit runs for 50 minutes. After the working condition stabilizes, the operating data is shown in Table 1:

[0122] Table 1. Example of operation data Table 1

[0123]

[0124] Close the front grille door when the machine is powered on:

[0125] After the temperature of T4 rises from 38 degrees to 51 degrees in 5 minutes, the current frequency limitation causes T4 to fluctuate back and forth between 48-51 degrees, and the frequency fluctuates back and forth between 36HZ-66HZ, with each cycle lasting about 5 minutes.

[0126] We then studied the situation in which the front grille door was closed and then restarted (simulating the initial startup of an outdoor unit installed in the grille). At this time, the T4 temperature was 37 degrees before startup and rose from 37 degrees to 51 degrees in 8 minutes after startup. The frequency and T4 temperature began to fluctuate, with a cycle of about 5 minutes.

[0127] Under this condition, the machine temperature keeps fluctuating in the 50.5 degree zone. Due to the influence of current frequency limiting, the machine operating frequency fluctuates, which in turn causes T4 to fluctuate, resulting in unstable machine operation. The average data in this state is shown in Table 2:

[0128] Table 2. Example of operation data Table 2

[0129]

[0130] From this we can see that whether the grille is closed during startup or the machine is started directly in the grille, the T4 temperature will quickly rise by 10-15 degrees within 5-10 minutes.

[0131] At the same time, after installing the grille, the capacity dropped by 1485W, the capacity decayed by 36%, and the energy efficiency decay was very obvious. In order to make the machine run stably, the target frequency is continuously lowered. It is found that when the target frequency is adjusted from 66HZ to 57HZ, the machine can run stably at 57HZ. The machine operation data is shown in Table 3:

[0132] Table 3. Example of operation data Table 3

[0133]

[0134] Comparing the stable operation of the machine with the unstable operation, the cooling capacity can be increased by 101W and 3.8%. This shows that the capacity can be slightly improved after the machine frequency runs stably.

[0135] In addition, while ensuring the stability of the machine frequency, the outdoor fan speed was increased at the same time. When the outdoor fan speed was increased from 830 rpm to 950 rpm, it was found that the T4 temperature dropped from 50.5 degrees to 48.5. The machine could run stably at 66HZ for 7 minutes, and then entered the frequency limit because T4 reached 51 degrees. The same operation was performed to reduce the target frequency from 66HZ to 64HZ, and the machine could run stably. The operating data is shown in Table 4:

[0136] Table 4. Example of operation data Table 4

[0137]

[0138] Compared with increasing the outdoor speed and maintaining stable frequency operation, the cooling capacity can be significantly increased by 474W, and the improvement ratio reaches 18%.

[0139] From the above data analysis, increasing the outdoor rotation speed can ensure sufficient heat exchange effect of the outdoor condenser. It has obvious improvement in capacity when installed in the grille, and it is also effective in maintaining stable operation of the prototype frequency. Therefore, the embodiment of the present invention can start from the above two aspects to improve and solve the problem of reduced air conditioning capacity caused by poor heat exchange effect due to poor air outlet in a similar grille environment.

[0140] Optionally, the step of adjusting the rotation speed of the external fan in a preset manner includes:

[0141] Obtaining an actual speed corresponding to the external fan, and increasing the actual speed according to a preset speed increment; and / or,

[0142] The actual speed, actual power and target air volume corresponding to the external fan are obtained, and the actual speed of the external fan is controlled according to the actual speed, actual power and target air volume.

[0143] Optionally, the step of controlling the actual speed of the external fan according to the actual speed, actual power and target air volume includes:

[0144] Determine the target power corresponding to the target air volume according to the actual rotation speed and the target air volume;

[0145] When the power difference between the actual power and the target power is not within the initial difference range, obtaining a control time and a speed step corresponding to the power difference;

[0146] After the control time period, the actual speed is adjusted according to the speed step size.

[0147] Specifically, when the outdoor fan is in a state of poor air flow, it can be handled by directly increasing the speed of the outdoor fan. For example, the speed can be increased by 200-300 revolutions per minute compared to the original cooling mode speed to improve the heat dissipation effect (the increased speed cannot exceed the upper limit speed allowed by the motor).

[0148] Optionally, when the outdoor fan is in a state of poor air flow, the corresponding motor speed can be increased through electronic control logic to achieve the effect of outdoor constant air volume. Optionally, by obtaining the actual speed, actual power and target air volume of the fan, the target power corresponding to the target air volume is obtained according to the actual speed and target air volume. When the power difference between the actual power and the target power is not within the initial difference range, the control time and speed step corresponding to the power difference are obtained; after the control time, the actual speed is adjusted according to the speed step, so as to realize real-time dynamic adjustment of the air volume of the fan and realize constant air volume control.

[0149] Optionally, the step of controlling the frequency of the compressor based on a preset compressor frequency control rule comprises:

[0150] Obtaining the current outdoor ambient temperature corresponding to the external fan;

[0151] Matching the current frequency limit value corresponding to the current outdoor ambient temperature according to a preset temperature frequency limit value comparison table;

[0152] The operating frequency of the compressor is controlled according to the current frequency limit value based on the compressor frequency control rule.

[0153] Optionally, the step of controlling the operating frequency of the compressor according to the current frequency limit value based on the compressor frequency control rule includes:

[0154] Counting the fluctuation value of the current frequency limit value occurring within a preset number of times, and determining whether the fluctuation value exceeds a preset fluctuation threshold;

[0155] If the fluctuation value exceeds the preset fluctuation threshold, the target frequency of the current compressor is determined and operated according to the current frequency limit value corresponding to the last time the current frequency limit was exited. If the current frequency limit occurs again during the operation, return to execute the step of determining the target frequency of the current compressor and operating according to the current frequency limit value corresponding to the last time the current frequency limit was exited and subsequent steps until the current frequency limit no longer occurs.

[0156] Specifically, when the outdoor fan is in a state of poor air discharge, the frequency of the compressor can also be controlled by a new compressor frequency linear control rule to ensure stable operation of the outdoor compressor frequency.

[0157] Optionally, the temperature limit frequency value comparison table is shown in Table 5:

[0158] Table 5. Temperature limit frequency value comparison table

[0159] 30 Hz Cooling T4 temperature limit value 1 (T4CoolStopTemp-ADD≥T4>58℃) 38 Hz Refrigeration T4 temperature limit value 1 (57℃≥T4>50.5℃) 58 Hz Refrigeration T4 temperature limit value 2 (49.5℃≥T4>45.5℃) 68 Hz Refrigeration T4 temperature limit value 3 (44.5℃≥T4>41℃) 77 Hz Refrigeration T4 temperature limit value 4 (40℃≥T4>33℃) 65 Hz Refrigeration T4 temperature limit value 5 (32℃≥T4>30℃)

[0160] Since the temperature of T4 is fluctuating at this time, taking Table 5 above as an example, the compressor frequency is in the range of 45.5℃-57℃, and the frequency keeps changing between 38HZ-58HZ controlled by the current frequency limit. Since the frequency change range is too large, the current frequency limit repeatedly appears and cannot be stabilized.

[0161] Optionally, the compressor frequency control logic in the embodiment of the present invention aims to solve the above frequency instability problem and ensure that the air conditioner can stably perform cooling operation at a relatively high frequency, thereby improving the cooling effect.

[0162] Optionally, a new compressor frequency control rule is implemented. For example, after the current frequency limiting fluctuation occurs three times repeatedly, the compressor target frequency for the fourth time is calculated according to the target frequency * 0.98 when the current frequency limiting was exited last time. When it is the fifth time, it is calculated according to the target frequency calculated for the fourth time * 0.98. This process is repeated until the frequency can run stably after the current frequency limiting no longer occurs.

[0163] This embodiment adopts the above scheme to adjust the rotation speed of the external fan in a preset manner; and / or, the frequency of the compressor is controlled based on a preset compressor frequency control rule. The rotation speed of the external fan can be adjusted to ensure sufficient heat exchange effect of the outdoor condenser, and / or, the frequency of the compressor can be controlled to maintain stable operation of the compressor frequency, thereby solving the problem of capacity reduction caused by poor heat exchange effect due to poor air outlet in a grille environment, thereby improving the refrigeration effect.

[0164] In addition, an embodiment of the present invention further provides a refrigeration control device, which is applied to an air conditioner, the air conditioner includes an outdoor fan and a compressor, and the refrigeration control device includes:

[0165] An acquisition module is used to acquire operation parameter information during the operation of the cooling mode;

[0166] The adjustment module is used to adjust the rotation speed of the external fan in a preset manner if it is determined according to the operating parameter information that the external fan is in a state of poor air flow, and / or to control the frequency of the compressor based on a preset compressor frequency control rule.

[0167] For the principle and implementation process of realizing refrigeration control in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0168] In addition, an embodiment of the present invention also proposes an air conditioner, which includes a memory, a processor, and a refrigeration control program stored in the memory and executable on the processor, and the refrigeration control program implements the steps of the refrigeration control method described above when executed by the processor.

[0169] Since all the technical solutions of all the aforementioned embodiments are adopted when the refrigeration control program is executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0170] In addition, an embodiment of the present invention further provides a computer-readable storage medium, on which a refrigeration control program is stored. When the refrigeration control program is executed by a processor, the steps of the refrigeration control method described above are implemented.

[0171] Since all the technical solutions of all the aforementioned embodiments are adopted when the refrigeration control program is executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0172] Compared with the prior art, the refrigeration control method, device, air conditioner and storage medium proposed in the embodiments of the present invention obtain operating parameter information during the operation of the refrigeration mode; if it is determined according to the operating parameter information that the external fan is in a state of poor air outlet, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule. By obtaining the operating parameter information during the operation of the refrigeration mode, it is possible to promptly determine whether the external fan is in a state of poor air outlet, and when the external fan is in a state of poor air outlet, the rotation speed of the external fan and / or the frequency of the compressor are adjusted, thereby avoiding the influence of the poor air outlet of the external fan on the refrigeration effect, thereby reducing related user complaints.

[0173] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0174] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0175] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as above, including several instructions for enabling an air conditioner (which can be controlled by a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the method of each embodiment of the present application.

[0176] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A refrigeration control method, characterized in that: The refrigeration control method is applied to an air conditioner, the air conditioner includes an external fan and a compressor, and the refrigeration control method includes the following steps: During the operation of the cooling mode, obtaining the operation parameter information; If it is determined according to the operating parameter information that the external fan is in a state of poor air flow, the rotation speed of the external fan is adjusted in a preset manner, and / or the frequency of the compressor is controlled based on a preset compressor frequency control rule.

2. The refrigeration control method according to claim 1, characterized in that: The step of obtaining the operating parameter information comprises: Collecting a first outdoor ambient temperature and a second outdoor ambient temperature corresponding to the external fan through a temperature sensor; and / or collecting a first pressure value and a second pressure value corresponding to the external fan through a pressure sensor; taking at least one of the first outdoor environment temperature, the second outdoor environment temperature, the first pressure value, and the second pressure value as the operation parameter information; The first outdoor ambient temperature and the second outdoor ambient temperature are collected at a time interval of a first preset time, and the first pressure value and the second pressure value are collected at a time interval of a first preset distance.

3. The refrigeration control method according to claim 1, characterized in that: The step of adjusting the rotation speed of the external fan in a preset manner comprises: Obtaining an actual speed corresponding to the external fan, and increasing the actual speed according to a preset speed increment; and / or, The actual speed, actual power and target air volume corresponding to the external fan are obtained, and the actual speed of the external fan is controlled according to the actual speed, actual power and target air volume.

4. The refrigeration control method according to claim 3, characterized in that: The step of controlling the actual speed of the external fan according to the actual speed, actual power and target air volume comprises: Determine the target power corresponding to the target air volume according to the actual rotation speed and the target air volume; When the power difference between the actual power and the target power is not within the initial difference range, obtaining a control time and a speed step corresponding to the power difference; After the control time period, the actual speed is adjusted according to the speed step size.

5. The refrigeration control method according to claim 1, characterized in that: The step of controlling the frequency of the compressor based on a preset compressor frequency control rule comprises: Obtaining the current outdoor ambient temperature corresponding to the external fan; Matching the current frequency limit value corresponding to the current outdoor ambient temperature according to a preset temperature frequency limit value comparison table; The operating frequency of the compressor is controlled according to the current frequency limit value based on the compressor frequency control rule.

6. The refrigeration control method according to claim 5, characterized in that: The step of controlling the operating frequency of the compressor according to the current frequency limit value based on the compressor frequency control rule comprises: Counting the fluctuation value of the current frequency limit value occurring within a preset number of times, and determining whether the fluctuation value exceeds a preset fluctuation threshold; If the fluctuation value exceeds the preset fluctuation threshold, the target frequency of the current compressor is determined and operated according to the current frequency limit value corresponding to the last time the current frequency limit was exited. If the current frequency limit occurs again during the operation, return to execute the step of determining the target frequency of the current compressor and operating according to the current frequency limit value corresponding to the last time the current frequency limit was exited and subsequent steps until the current frequency limit no longer occurs.

7. The refrigeration control method according to claim 2, characterized in that: Before the step of determining that the external fan is in a state of poor air flow according to the operating parameter information, the step further includes: Calculating temperature difference data according to the first outdoor ambient temperature and the second outdoor ambient temperature, and determining whether the temperature difference data is less than a preset temperature difference threshold; and / or calculating pressure difference data according to the first pressure value and the second pressure value, and determining whether the pressure difference data is less than a preset pressure difference threshold; If the temperature difference data is not less than a preset temperature difference threshold, or the pressure difference data is not less than a preset pressure difference threshold, it is determined that the external fan is in a state of poor air outlet.

8. A refrigeration control device, characterized in that: The refrigeration control device is applied to an air conditioner, the air conditioner includes an external fan and a compressor, and the refrigeration control device includes: An acquisition module is used to acquire operation parameter information during the operation of the cooling mode; The adjustment module is used to adjust the rotation speed of the external fan in a preset manner if it is determined according to the operating parameter information that the external fan is in a state of poor air flow, and / or to control the frequency of the compressor based on a preset compressor frequency control rule.

9. An air conditioner, characterized in that: The air conditioner includes a memory, a processor, and a refrigeration control program stored in the memory and executable on the processor. When the refrigeration control program is executed by the processor, the steps of the refrigeration control method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a refrigeration control program, and when the refrigeration control program is executed by the processor, the steps of the refrigeration control method according to any one of claims 1 to 7 are implemented.

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