Air conditioner frequency control method and device, air conditioner and storage medium

Abstract

This invention provides an air conditioning frequency control method, device, air conditioner, and storage medium, relating to the field of air conditioning technology. The method is applied to an air conditioner controller, which also includes a first high-pressure switch and a second high-pressure switch. The pressure threshold of the first high-pressure switch is lower than that of the second high-pressure switch. The first and second high-pressure switches are communicatively connected to the controller. The method includes: when the air conditioner pressure reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch, acquiring a first external circuit temperature and a first frequency of the air conditioner; controlling the first frequency to decrease, and acquiring the second external circuit temperature of the air conditioner after a first preset time period; determining the relationship between the second and first external circuit temperatures, and adjusting the air conditioner frequency according to the determination result to ensure that the air conditioner pressure meets a preset pressure range. This invention can improve the user's air conditioning experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning frequency control method, device, air conditioner, and storage medium. Background Technology

[0002] When an air conditioner is running, its pressure needs to be kept within a normal range to ensure that its components are not damaged.

[0003] In existing technologies, in order to protect the components of the air conditioner from damage, a pipe temperature overload protection value is usually preset or a high-pressure sensor is set. When the external coil temperature reaches the pipe temperature overload protection value, or the high-pressure sensor detects that the system pressure exceeds the limit, the air conditioner is controlled to stop running.

[0004] This will cause the air conditioner to frequently shut down due to excessive pressure, which will greatly affect the user experience. Summary of the Invention

[0005] The objectives of this invention include, for example, providing an air conditioning frequency control method, apparatus, air conditioner, and storage medium that can at least partially solve the aforementioned technical problems.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide an air conditioner frequency control method, applied to an air conditioner controller, wherein the air conditioner further includes a first high-pressure switch and a second high-pressure switch, the pressure threshold of the first high-pressure switch being lower than that of the second high-pressure switch; the first high-pressure switch and the second high-pressure switch are respectively communicatively connected to the controller; the method includes:

[0008] If the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch, the first external temperature and the first frequency of the air conditioner are obtained.

[0009] Control the first frequency to be reduced, and obtain the second external temperature of the air conditioner after a first preset time;

[0010] The relationship between the second outer plate temperature and the first outer plate temperature is determined, and the frequency of the air conditioner is adjusted according to the determination result so that the pressure of the air conditioner meets the preset pressure range.

[0011] Optionally, determining the relationship between the second outer plate temperature and the first outer plate temperature, and adjusting the frequency of the air conditioner based on the determination result, includes:

[0012] If the temperature of the second outer disk is greater than or equal to the temperature of the first outer disk, the first frequency after frequency reduction will continue to be reduced, and the temperature of the second outer disk will be reacquired after the first preset time until the temperature of the second outer disk is less than the temperature of the first outer disk.

[0013] Optionally, after the temperature of the second outer disk is lower than the temperature of the first outer disk, the method further includes:

[0014] Obtain the second frequency of the air conditioner, where the second frequency is the air conditioner frequency measured when the temperature of the second outer plate is lower than the temperature of the first outer plate;

[0015] Determine whether the temperature of the second outer disk is within the preset frequency upsampling temperature range;

[0016] If so, the second frequency is controlled to be increased based on the preset frequency increase strategy.

[0017] Optionally, the preset frequency upsampling temperature range includes a first range, a second range, and a third range, wherein the temperature of the first range is lower than the temperature of the second range, and the temperature of the second range is lower than the temperature of the third range; the step of controlling the frequency upsampling based on the preset frequency upsampling strategy includes:

[0018] If the temperature of the second outer disk is within the first range, the second frequency is controlled to increase, and the temperature of the second outer disk is reacquired after a second preset time for judgment.

[0019] If the temperature of the second outer disk is in the third range, the second frequency is maintained, and the temperature of the second outer disk is reacquired after the second preset time for judgment.

[0020] If the temperature of the second outer plate is within the second range, the frequency of the air conditioner is controlled according to the control method of the preset frequency increase temperature range in which the temperature of the second outer plate was previously measured.

[0021] Optionally, the method further includes:

[0022] Determine whether the first frequency after frequency reduction is less than or equal to the preset minimum operating frequency;

[0023] If so, the air conditioner is controlled to operate at the preset minimum operating frequency.

[0024] Optionally, the method further includes:

[0025] Determine whether the temperature of the first outer plate is lower than the preset pipe temperature protection value;

[0026] If so, the preset pipe temperature protection value is corrected based on the preset correction value, and the corrected preset pipe temperature protection value is used as the new preset pipe temperature protection value.

[0027] Optionally, the method further includes:

[0028] If the second high-voltage switch is disconnected, the air conditioner will be shut down.

[0029] Secondly, embodiments of the present invention provide an air conditioner frequency control device, applied to an air conditioner controller. The air conditioner further includes a first high-pressure switch and a second high-pressure switch, wherein the pressure threshold of the first high-pressure switch is lower than that of the second high-pressure switch; the first high-pressure switch and the second high-pressure switch are respectively communicatively connected to the controller; the air conditioner frequency control device includes:

[0030] The data acquisition unit is used to acquire the first external temperature and the first frequency of the air conditioner when the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch.

[0031] A first frequency control unit is used to control the first frequency to be reduced, and to obtain the second external temperature of the air conditioner after a first preset time.

[0032] The second frequency control unit is used to determine the relationship between the second outer plate temperature and the first outer plate temperature, and adjust the frequency of the air conditioner according to the determination result so that the pressure of the air conditioner meets the preset pressure range.

[0033] Thirdly, embodiments of the present invention provide an air conditioner that, when in operation, can implement the steps of any of the methods described above.

[0034] Fourthly, embodiments of the present invention provide a computer-readable storage medium, the computer-readable storage medium including a computer program, wherein the computer program, when executed, controls a server where the computer-readable storage medium is located to implement the steps of any of the methods described above.

[0035] The beneficial effects of the embodiments of the present invention include, for example:

[0036] Two high-pressure switches with different pressure thresholds are set up. When the high-pressure switch with the lower pressure threshold is open and the high-pressure switch with the higher pressure threshold is not open, the first frequency is reduced by acquiring the first external plate temperature and the first frequency. After a first preset time, the second external plate temperature is acquired, and the difference between the second and first external plate temperatures is compared. Based on the result, the air conditioner frequency is adjusted. This ensures that the air conditioner's components are not damaged and that it does not shut down repeatedly due to excessive pressure, thus improving the user experience. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention;

[0039] Figure 2 A flowchart illustrating the steps of an air conditioning frequency control method provided in an embodiment of the present invention;

[0040] Figure 3 A control flowchart of an air conditioning frequency control method provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of an air conditioning frequency control device provided in an embodiment of the present invention.

[0042] Icons: 01-Air conditioner; 11-Controller; 12-Compressor; 13-Evaporator; 14-Throttle valve; 15-Condenser; 16-First high-pressure switch; 17-Second high-pressure switch; 300-Air conditioner frequency control device; 301-Data acquisition unit; 302-First frequency control unit; 303-Second frequency control unit. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0047] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0048] like Figure 1 The diagram shown is a structural schematic of an air conditioner 01 provided in this specification. The air conditioner 01 includes a controller 11, a compressor 12, an evaporator 13, a throttle valve 14, a condenser 15, a first high-pressure switch 16, and a second high-pressure switch 17.

[0049] The compressor 12, evaporator 13, expansion valve 14, and condenser 15 are connected by pipelines to form a refrigerant circuit, allowing the refrigerant to circulate within the circuit. The compressor 12 compresses the refrigerant, transforming low-pressure refrigerant into high-pressure refrigerant. The condenser 15 operates in cooling mode, allowing the refrigerant compressed by the compressor 12 to dissipate heat and condense. The evaporator 13 operates in heating mode, allowing the depressurized refrigerant to absorb heat from the air and evaporate. The expansion valve 14 reduces the saturated or subcooled liquid in the condenser 15 to the evaporation pressure and temperature after throttling. A first high-pressure switch 16 and a second high-pressure switch 17 are located on the pipeline between the compressor 12 and the condenser 15. When the first high-pressure switch 16 is open, the air conditioner 01 will not stop; when the second high-pressure switch 17 is open, the air conditioner 01 will stop.

[0050] Controller 11 includes a processor. The processor may include a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), and may be used to perform the corresponding operations described in controller 11 when the processor executes a program stored in a non-transitory computer-readable medium coupled to controller 11. The non-transitory computer-readable storage medium may include magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), smart cards or flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks, or keyboard drives).

[0051] Air conditioners need to operate under normal system pressure to prevent damage to their components. To ensure air conditioners operate under normal system pressure, the following methods are currently used:

[0052] 1. A preset pipe temperature overload protection value is set. If the outdoor unit coil temperature is greater than or equal to this pipe temperature overload protection value, it indicates that the system pressure is high, and the system will perform frequency reduction protection. However, when the system load changes rapidly and the system pressure rises sharply, due to the slow response of the outdoor unit coil temperature value, the system pressure has already seriously exceeded the limit by the time the protection value is reached.

[0053] 2. Install a high-pressure sensor. While this method can detect high pressure in a timely manner, it is costly.

[0054] 3. A high-pressure switch is installed on the air conditioner. When the pressure exceeds the limit, the high-pressure switch is triggered and the entire unit shuts down. However, after shutdown, the air conditioner compressor cannot run, and the unit cannot cool or heat during the shutdown period, which greatly affects the user experience.

[0055] Based on the above, this application provides an air conditioning frequency control method, device, air conditioner, and storage medium, which can effectively alleviate the above-mentioned technical problems.

[0056] Corresponding to Figure 1 The air conditioner shown in the embodiment of the present invention provides an air conditioner frequency control method applied to the air conditioner controller. The air conditioner further includes a first high-pressure switch and a second high-pressure switch, wherein the pressure threshold of the first high-pressure switch is lower than that of the second high-pressure switch; the first high-pressure switch and the second high-pressure switch are respectively communicatively connected to the controller. The method includes, as shown in the embodiment of the present invention, a frequency control method for an air conditioner. Figure 2 The following steps are shown:

[0057] Step S110: If the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch, obtain the first external temperature and the first frequency of the air conditioner.

[0058] Step S120: Control the first frequency to decrease, and obtain the second external temperature of the air conditioner after a first preset time.

[0059] Step S130: Determine the relationship between the second outer plate temperature and the first outer plate temperature, and adjust the frequency of the air conditioner according to the determination result so that the pressure of the air conditioner meets the preset pressure range.

[0060] Execute step S110: if the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch, obtain the first external temperature and the first frequency of the air conditioner.

[0061] When the air conditioner's pressure reaches the pressure threshold of the first high-pressure switch but not the pressure threshold of the second high-pressure switch (i.e., the first high-pressure switch disconnects due to reaching the pressure threshold, while the second high-pressure switch remains open), a frequency reduction signal can be generated at the first high-pressure switch and sent to the controller. Upon receiving this frequency reduction signal, the controller begins to acquire the air conditioner's current external surface temperature (i.e., the first external surface temperature) and the air conditioner's current operating frequency (i.e., the first frequency).

[0062] In another possible implementation, the controller can monitor the status of the first high-voltage switch and the second high-voltage switch at all times. If the first high-voltage switch is detected to be open and the second high-voltage switch is not open, the controller will start acquiring the first outer plate temperature and the first frequency.

[0063] Since the first high-pressure switch is open, it indicates that the air conditioning system pressure is high at this time, so frequency reduction control needs to be implemented immediately. Step S120 is executed to control the first frequency to be reduced, and the second external temperature of the air conditioner is obtained after a first preset time.

[0064] There are several ways to control the first frequency reduction. For example, the first frequency of the air conditioner can be reduced directly to a fixed frequency; or the first frequency can be reduced at a preset rate, decreasing by a certain number of hertz; or the first frequency can be reduced to a certain percentage of the current frequency, etc. After the frequency is reduced, the air conditioner runs for a first preset time, and after the first preset time, the external temperature of the air conditioner (i.e., the second external temperature) is re-acquired.

[0065] For example, if the first frequency is 70Hz, the first preset duration is 10s, the frequency reduction rate is 2Hz / s, and the frequency reduction duration is 3s, when the air conditioner starts to reduce its frequency, the first frequency is reduced at a rate of 2Hz / s for 3s, down to 64Hz, and then this frequency is maintained for 10s before the second external temperature is obtained.

[0066] Step S130 is executed to determine the relationship between the second outer plate temperature and the first outer plate temperature, and the frequency of the air conditioner is adjusted according to the determination result so that the pressure of the air conditioner meets the preset pressure range.

[0067] Since the second outer plate temperature is obtained after the first frequency is reduced and the system has been running for a preset duration, its temperature value is related to the first outer plate temperature. By comparing the first and second outer plate temperatures, the air conditioner frequency can be further adjusted to ensure the air conditioner's pressure meets the preset pressure range.

[0068] As an optional implementation, different frequency adjustment strategies can be set for the three judgment results: the second outer plate temperature is greater than the first outer plate temperature, the second outer plate temperature is equal to the first outer plate temperature, and the second outer plate temperature is less than the first outer plate temperature. When the relationship between the second outer plate temperature and the first outer plate temperature changes, the corresponding frequency adjustment strategy is selected to adjust the air conditioning frequency.

[0069] Optionally, determining the relationship between the second outer plate temperature and the first outer plate temperature, and adjusting the frequency of the air conditioner based on the determination result, includes:

[0070] If the temperature of the second outer disk is greater than or equal to the temperature of the first outer disk, the first frequency after frequency reduction will continue to be reduced, and the temperature of the second outer disk will be reacquired after the first preset time until the temperature of the second outer disk is less than the temperature of the first outer disk.

[0071] As another optional implementation, when the second outer plate temperature is greater than or equal to the first outer plate temperature, the air conditioner can be controlled to continue reducing its frequency beyond the initial frequency reduction. The air conditioner is then kept running at the reduced frequency for a first preset duration, and the second outer plate temperature is re-acquired and compared with the first outer plate temperature until the second outer plate temperature is lower than the first outer plate temperature.

[0072] Taking a first frequency of 70Hz, a first preset duration of 10s, a frequency reduction rate of 2Hz / s, and a frequency reduction duration of 3s as an example, if the first frequency after frequency reduction is 64Hz, the air conditioner will continue to run at a frequency of 64Hz for 10s, and the outer plate temperature (i.e., the second outer plate temperature) will be obtained again. If the obtained second outer plate temperature is still greater than or equal to the first outer plate temperature, the first frequency will continue to be controlled to be reduced from 64Hz to 58Hz within 3s... until the obtained second outer plate temperature is still less than the first outer plate temperature.

[0073] Optionally, the method further includes:

[0074] Determine whether the first frequency after frequency reduction is less than or equal to the preset minimum operating frequency. If so, control the air conditioner to operate at the preset minimum operating frequency.

[0075] Each time the controller controls the air conditioner to reduce its frequency, it needs to first determine whether the first frequency after the previous frequency reduction has reached the preset minimum operating frequency. If it has, the controller will no longer reduce the frequency of the air conditioner, but will control the air conditioner to operate at the preset minimum operating frequency.

[0076] Optionally, after the temperature of the second outer disk is lower than the temperature of the first outer disk, the method further includes:

[0077] Obtain the second frequency of the air conditioner, which is the air conditioner frequency measured when the temperature of the second outer plate is lower than the temperature of the first outer plate.

[0078] Determine whether the temperature of the second outer disk is within the preset frequency ramp-up temperature range. If so, control the second frequency to ramp up based on the preset frequency ramp-up strategy.

[0079] To prevent the air conditioner frequency from becoming too low after frequency reduction, which would affect its operating performance, it is necessary to adjust the air conditioner frequency to increase under certain conditions. When the temperature of the second external circuit is lower than that of the first external circuit, the current air conditioner frequency is obtained as the second frequency. It is then determined whether the temperature of the second external circuit is within the preset frequency increase temperature range. If so, the second frequency is increased according to the preset frequency increase strategy.

[0080] There are several ways to increase the frequency, such as directly controlling the air conditioner to increase from the second frequency to a fixed frequency; or making the air conditioner increase from the second frequency to a fixed hertz at a fixed rate, etc.

[0081] Optionally, the preset frequency upsampling temperature range includes a first range, a second range, and a third range, wherein the temperature of the first range is lower than the temperature of the second range, and the temperature of the second range is lower than the temperature of the third range; the step of controlling the frequency upsampling based on the preset frequency upsampling strategy includes:

[0082] If the temperature of the second outer disk is within the first range, the second frequency is controlled to increase, and the temperature of the second outer disk is reacquired after a second preset time for judgment.

[0083] If the temperature of the second outer disk is within the third range, the second frequency is maintained, and the temperature of the second outer disk is reacquired after the second preset time for judgment.

[0084] If the temperature of the second outer plate is within the second range, the frequency of the air conditioner is controlled according to the control method of the preset frequency increase temperature range in which the temperature of the second outer plate was previously measured.

[0085] To accurately adjust the air conditioner frequency under different external coil temperature differences, three preset frequency-increase temperature ranges can be set: a first range, a second range, and a third range. The temperature in the first range is lower than the temperature in the second range, and the temperature in the second range is lower than the temperature in the third range. When the second external coil temperature is in the first range, the air conditioner's second frequency is increased. After increasing the frequency and running for a second preset time, the second external coil temperature is re-acquired for judgment. If the second external coil temperature is in the third range, the air conditioner is controlled to maintain the second frequency, and the second external coil temperature is re-acquired for judgment after another second preset time.

[0086] For example, if the first outer plate temperature is 25℃, the first interval is (-∞, (25-3)℃), the second interval is ((25-3)℃, (25-2)℃), and the third interval is ((25-2)℃, +∞); the second preset duration is 40s. When the second outer plate temperature is in the (-∞, (25-3)℃) interval, the second frequency can be increased by 1Hz and maintained for 40s before the second outer plate temperature is re-acquired to determine its preset frequency increase temperature range. When the second outer plate temperature is in the ((25-2)℃, +∞) interval, the air conditioner is controlled to maintain the second frequency for 40s, after which the second outer plate temperature is re-acquired to determine its preset frequency increase temperature range.

[0087] If the second outer plate temperature is within the second range, the frequency of the air conditioner is controlled according to the control method of the preset frequency-increasing temperature range in which the previously measured second outer plate temperature is located. For example, if the current second outer plate temperature is in the second range and the previously detected second outer plate temperature was in the third range, then the second frequency of the air conditioner is controlled according to the frequency control method of the third range.

[0088] Optionally, the method further includes: determining whether the temperature of the first outer plate is less than a preset pipe temperature protection value.

[0089] If so, the preset pipe temperature protection value is corrected based on the preset correction value, and the corrected preset pipe temperature protection value is used as the new preset pipe temperature protection value.

[0090] The preset pipe temperature protection value can be a temperature threshold set to prevent the first high-voltage switch from tripping. When the temperature of the first outer casing is lower than the preset pipe temperature protection value, it indicates that the preset pipe temperature protection is delayed because the preset pipe temperature protection value is set too high, resulting in a failure to provide timely protection. The preset pipe temperature protection value needs to be corrected. There are several ways to correct the preset pipe temperature protection value, such as reducing it by the set temperature value each time, or directly reducing it to a certain percentage of the current preset pipe temperature protection value, etc. The corrected preset pipe temperature protection value is used as the new preset pipe temperature protection value. If the first high-voltage switch continues to trip or the temperature of the first outer casing is still lower than the preset pipe temperature protection value, the preset pipe temperature protection value continues to be corrected until the first high-voltage switch no longer trips or the temperature of the first outer casing is no less than the preset pipe temperature protection value.

[0091] For example, the initial preset pipe temperature protection value is 27℃. If the temperature of the first outer plate is lower than the preset pipe temperature protection value or the first high-pressure switch is disconnected, the preset pipe temperature protection value is adjusted to 26℃. If the temperature of the first outer plate is lower than the preset pipe temperature protection value or the first high-pressure switch is disconnected again, the preset pipe temperature protection value is adjusted to 25℃... until the first high-pressure switch no longer disconnects or the temperature of the first outer plate is not lower than the preset pipe temperature protection value.

[0092] Optionally, the method further includes: if the second high-voltage switch is disconnected, controlling the air conditioner to stop.

[0093] If the second high-pressure switch is disconnected during the adjustment of the air conditioner's frequency, the air conditioner will be shut down for protection, pending troubleshooting or other procedures by staff.

[0094] To better explain the solution of this application, embodiments of this specification also provide, as follows: Figure 3 The flowchart shown below illustrates this solution.

[0095] like Figure 3 When the first high-voltage switch is open and the second high-voltage switch is not open, the temperature T of the first outer casing is obtained. 1外盘 And the first frequency F1. Because the first high-voltage switch is open, the first frequency F1 is reduced, and the second outer disk temperature T is obtained after a first preset time t1. 2外盘 Determine T 2外盘 Is it greater than or equal to T? 1外盘 If so, continue to control F1 to reduce the frequency, and reacquire T after t1. 2外盘 Perform a judgment; if not, then judge T. 2外盘 The preset frequency ramp-up temperature range. If T 2外盘 If it is in the first interval, then control the second frequency F of the air conditioner to increase, and re-evaluate after the second preset time t2; if T 2外盘 If it is in the third interval, then the control F of the air conditioner remains unchanged, and the judgment is re-evaluated after t2; if T 2外盘 If it falls within the second interval, then determine the previously measured T. 2外盘 The frequency of the air conditioner is controlled by a control method within the preset frequency increase temperature range.

[0096] Based on the same inventive concept, such as Figure 4 As shown in the figure, an embodiment of the present invention provides an air conditioner frequency control device 300, applied to an air conditioner controller. The air conditioner further includes a first high-pressure switch and a second high-pressure switch, wherein the pressure threshold of the first high-pressure switch is lower than that of the second high-pressure switch; the first high-pressure switch and the second high-pressure switch are respectively communicatively connected to the controller; the air conditioner frequency control device 300 includes:

[0097] The data acquisition unit 301 is used to acquire the first external temperature and the first frequency of the air conditioner when the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch.

[0098] The first frequency control unit 302 is used to control the first frequency to decrease and to obtain the second external temperature of the air conditioner after a first preset time.

[0099] The second frequency control unit 303 is used to determine the relationship between the second outer plate temperature and the first outer plate temperature, and adjust the frequency of the air conditioner according to the determination result so that the pressure of the air conditioner meets the preset pressure range.

[0100] Regarding the aforementioned air conditioning frequency control device 300, the specific functions of each unit have been described in detail in the embodiments of the air conditioning frequency control method provided in this specification, and will not be elaborated upon here.

[0101] Based on the same inventive concept, the embodiments of this invention provide an air conditioner that can perform any of the steps of the aforementioned air conditioner frequency control method during operation.

[0102] The specific functions of the air conditioner have been described in detail in the embodiments of the air conditioner frequency control method provided in this specification, and will not be elaborated here.

[0103] Based on the same inventive concept, embodiments of this invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods of the aforementioned air conditioning frequency control method.

[0104] The present invention has at least the following beneficial effects:

[0105] 1. Two high-pressure switches with different pressure thresholds are set. When the high-pressure switch with the lower pressure threshold is open and the high-pressure switch with the higher pressure threshold is not open, the first frequency is reduced by acquiring the first external plate temperature and the first frequency. After a first preset time, the second external plate temperature is acquired, and the difference between the second and first external plate temperatures is compared. Based on the result, the air conditioner frequency is adjusted. This ensures that the air conditioner's components are not damaged and that it does not shut down repeatedly due to excessive pressure, thus improving the user experience.

[0106] 2. By judging the relationship between the first external plate temperature and the preset pipe temperature protection value, the preset pipe temperature protection value is corrected based on the preset correction value, which further reduces the problem of air conditioner shutting down due to excessive pressure.

[0107] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0108] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0109] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning frequency control method, characterized in that, A controller for an air conditioner, the air conditioner further comprising a first high-pressure switch and a second high-pressure switch, wherein the pressure threshold of the first high-pressure switch is lower than that of the second high-pressure switch; the first high-pressure switch and the second high-pressure switch are respectively communicatively connected to the controller; the method includes: If the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch, the first external temperature and the first frequency of the air conditioner are obtained. Control the first frequency to be reduced, and obtain the second external temperature of the air conditioner after a first preset time; Determine the relationship between the second outer plate temperature and the first outer plate temperature, and adjust the frequency of the air conditioner according to the determination result to ensure that the air conditioner pressure meets the preset pressure range. This includes: if the second outer plate temperature is greater than or equal to the first outer plate temperature, continue to control the first frequency after frequency reduction to continue to reduce the frequency, and re-acquire the second outer plate temperature after the first preset time period until the second outer plate temperature is less than the first outer plate temperature; acquire the second frequency of the air conditioner, which is the air conditioner frequency measured when the second outer plate temperature is less than the first outer plate temperature; determine whether the second outer plate temperature is within the preset frequency increase temperature range; if so, control the second frequency to increase based on the preset frequency increase strategy.

2. The air conditioning frequency control method as described in claim 1, characterized in that, The preset frequency ramping temperature range includes a first range, a second range, and a third range, wherein the temperature of the first range is lower than the temperature of the second range, and the temperature of the second range is lower than the temperature of the third range. The step of controlling the second frequency to be upscaled based on a preset upscale strategy includes: If the temperature of the second outer disk is within the first range, the second frequency is controlled to increase, and the temperature of the second outer disk is reacquired after a second preset time for judgment. If the temperature of the second outer disk is in the third range, the second frequency is maintained, and the temperature of the second outer disk is reacquired after the second preset time for judgment. If the temperature of the second outer plate is within the second range, the frequency of the air conditioner is controlled according to the control method of the preset frequency increase temperature range in which the temperature of the second outer plate was previously measured.

3. The air conditioning frequency control method as described in claim 1, characterized in that, The method further includes: Determine whether the first frequency after frequency reduction is less than or equal to the preset minimum operating frequency; If so, the air conditioner is controlled to operate at the preset minimum operating frequency.

4. The air conditioning frequency control method as described in claim 1, characterized in that, The method further includes: Determine whether the temperature of the first outer plate is lower than the preset pipe temperature protection value; If so, the preset pipe temperature protection value is corrected based on the preset correction value, and the corrected preset pipe temperature protection value is used as the new preset pipe temperature protection value.

5. The air conditioning frequency control method as described in claim 1, characterized in that, The method further includes: If the second high-voltage switch is disconnected, the air conditioner will be shut down.

6. An air conditioning frequency control device, characterized in that, A controller for an air conditioner, the air conditioner further including a first high-pressure switch and a second high-pressure switch, the pressure threshold of the first high-pressure switch being lower than that of the second high-pressure switch; the first high-pressure switch and the second high-pressure switch are respectively communicatively connected to the controller; The air conditioning frequency control device includes: The data acquisition unit is used to acquire the first external temperature and the first frequency of the air conditioner when the pressure of the air conditioner reaches the pressure threshold of the first high-pressure switch but does not reach the pressure threshold of the second high-pressure switch. A first frequency control unit is used to control the first frequency to be reduced, and to obtain the second external temperature of the air conditioner after a first preset time. The second frequency control unit is used to determine the relationship between the second outer plate temperature and the first outer plate temperature, and adjust the frequency of the air conditioner according to the determination result so that the pressure of the air conditioner meets the preset pressure range. This includes: if the second outer plate temperature is greater than or equal to the first outer plate temperature, then continuing to control the first frequency after frequency reduction to continue reducing the frequency, and re-acquiring the second outer plate temperature after the first preset time period until the second outer plate temperature is less than the first outer plate temperature; acquiring the second frequency of the air conditioner, where the second frequency is the air conditioner frequency measured when the second outer plate temperature is less than the first outer plate temperature; determining whether the second outer plate temperature is within the preset frequency increase temperature range; if so, controlling the second frequency to increase based on the preset frequency increase strategy.

7. An air conditioner, characterized in that, The air conditioner is capable of performing the steps of the method described in any one of claims 1 to 5 when it is in operation.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program, which, when executed, controls the server where the computer-readable storage medium is located to implement the steps of the method according to any one of claims 1 to 5.

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