Air conditioner compressor frequency control method and device and air conditioner

Abstract

This invention provides a method, apparatus, and air conditioner for controlling the frequency of an air conditioner compressor, relating to the field of air conditioning technology. The method includes: after the air conditioner is turned on for the Nth time, controlling the compressor frequency to increase in a segmented frequency-increasing mode, maintaining a first dwell time at at least one first frequency platform until the frequency reaches a stable operating frequency. After the air conditioner is turned on for the N+1th time, correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain a second dwell time, and controlling the compressor frequency to increase in the segmented frequency-increasing mode, maintaining the second dwell time at at least one second frequency platform until the frequency reaches the stable operating frequency. This method can effectively adjust the rate of frequency increase, optimize the compressor's frequency increase rhythm, minimize the triggering of the exhaust temperature protection mechanism, thereby improving the compressor's frequency fluctuation problem and enhancing the user experience.

Description

Technical Field

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

[0002] Currently, in air conditioning systems, the compressor typically increases its frequency by setting a fixed rate of increase, which then increases to the highest operating frequency under the current conditions. However, this current method of increasing the compressor's frequency too quickly can lead to excessively high instantaneous exhaust temperatures, triggering system protection mechanisms and causing frequency fluctuations in the compressor, thus affecting the user experience. Summary of the Invention

[0003] The problem solved by this invention is that an excessively fast frequency ramp-up rate leads to excessively high instantaneous exhaust temperature, triggering the system protection mechanism and causing frequency fluctuations in the compressor.

[0004] To address the aforementioned problems, embodiments of the present invention provide an air conditioner compressor frequency control method, device, and air conditioner.

[0005] In a first aspect, the present invention provides a method for controlling the frequency of an air conditioner compressor, the method comprising: after the air conditioner is turned on for the Nth time, controlling the frequency of the compressor to increase in a segmented frequency increase mode, maintaining a first dwell time at at least one first frequency platform until the frequency is increased to a stable operating frequency, wherein N is a positive integer greater than or equal to 1;

[0006] After the air conditioner is turned on for the N+1th time, the first dwell time is corrected according to the exhaust temperature at the platform start point to obtain a second dwell time. During the process of frequency increase of the compressor in the segmented frequency increase mode, the second dwell time is maintained at at least one second frequency platform until the frequency is increased to a stable operating frequency, so that the exhaust temperature of the compressor is within a preset range. The exhaust temperature at the platform start point represents the exhaust temperature when the actual operating frequency of the compressor during the frequency increase process reaches the second frequency platform corresponding to the first frequency platform.

[0007] The air conditioner compressor frequency control method provided in this invention sets a frequency platform (e.g., a first frequency platform and a second frequency platform) during the frequency ramp-up process, maintains operation on the frequency platform for a corresponding dwell time (e.g., a first dwell time and a second dwell time), and then continues to ramp up the frequency until it reaches the stable operating frequency of the compressor under the current conditions. This prevents the frequency ramp-up rate from becoming too fast. Furthermore, after the air conditioner is turned on for the N+1th time, a second dwell time can be obtained by adjusting the first dwell time during the previous startup's segmented frequency ramp-up process based on the exhaust temperature at the platform's starting point. By adjusting the dwell time on the frequency platform, the speed of frequency ramp-up can be effectively adjusted, optimizing the compressor's frequency ramp-up rhythm and minimizing the triggering of the exhaust temperature protection mechanism. This improves the compressor's frequency fluctuation problem and enhances the user experience.

[0008] Further, in an optional implementation, the step of correcting the first residence time based on the exhaust temperature at the platform's starting point to obtain the second residence time includes:

[0009] If the exhaust temperature at the platform's starting point is greater than the first preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time plus the first preset time.

[0010] Further, in an optional implementation, the step of correcting the first residence time based on the exhaust temperature at the platform's starting point to obtain the second residence time includes:

[0011] If the exhaust temperature at the platform's starting point is less than the second preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time minus the second preset time.

[0012] Further, in an optional implementation, after the step of calculating the second dwell time as equal to the first dwell time minus the second preset time, the method further includes:

[0013] If the second dwell time is reduced to 0s, then the second dwell time is controlled to no longer decrease and is maintained at 0s.

[0014] Further, in an optional implementation, the step of correcting the first residence time based on the exhaust temperature at the platform's starting point to obtain the second residence time includes:

[0015] If the exhaust temperature at the platform's starting point is greater than or equal to the second preset exhaust temperature and less than or equal to the first preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time.

[0016] Further, in an optional embodiment, after the step of correcting the first residence time based on the exhaust temperature at the platform's starting point to obtain the second residence time, the method further includes:

[0017] If all the corrected second dwell times are equal to all the corresponding first dwell times during the compressor's frequency ramping process in the segmented frequency ramping mode after the previous start-up, then the compressor is controlled to exit the correction control and the correction count is set to zero.

[0018] Furthermore, in an optional embodiment, after the step of controlling the compressor to exit the correction control, the method further includes:

[0019] After the Kth startup following the exit of correction control, the compressor is controlled to re-enter correction control and the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time is executed, where K is a positive integer greater than or equal to 1.

[0020] Furthermore, in an optional implementation, the method further includes:

[0021] After the air conditioner is turned on at any time, the outer ambient temperature of the air conditioner is obtained;

[0022] The number of frequency platforms during the process of the compressor increasing its frequency to the stable operating frequency in the segmented frequency increase mode is determined based on the outer ring temperature.

[0023] The frequency corresponding to the frequency platform is calculated based on the number of platforms and the stable operating frequency. Further, in an optional embodiment, the method further includes:

[0024] After the air conditioner is turned on for the N+1th time, it is determined whether the number of platforms of the second frequency platform is the same as the number of platforms of the first frequency platform.

[0025] If so, then the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time is performed;

[0026] If not, then the second dwell time will be set to the preset initial dwell time.

[0027] In a second aspect, the present invention provides an air conditioner compressor frequency control device, the device comprising: a frequency ramping control module, used to control the compressor frequency to maintain a first dwell time at at least one first frequency platform until the frequency ramps to a stable operating frequency during the process of ramping up the compressor in a segmented frequency ramping mode after the air conditioner is turned on for the Nth time, wherein N is a positive integer greater than or equal to 1;

[0028] The correction control module is used to correct the first dwell time to obtain a second dwell time based on the exhaust temperature at the platform starting point after the air conditioner is turned on for the N+1th time, and to control the compressor frequency to maintain the second dwell time at at least one second frequency platform during the frequency increase process in the segmented frequency increase mode until the frequency is increased to a stable operating frequency, so that the exhaust temperature of the compressor is within a preset range, wherein the exhaust temperature at the platform starting point represents the exhaust temperature when the actual operating frequency of the compressor during the frequency increase process reaches the second frequency platform corresponding to the first frequency platform.

[0029] The technical effects of the air conditioner compressor frequency control device provided in this embodiment of the invention are similar to those of the air conditioner compressor frequency control method. It can prevent the frequency increase rate from being too fast and can effectively adjust the frequency increase rate, optimize the frequency increase rhythm of the compressor, minimize the triggering of the exhaust temperature protection mechanism, thereby improving the frequency fluctuation problem of the compressor and enhancing the user experience.

[0030] Thirdly, the present invention provides an air conditioner including a controller, the controller being configured to execute a computer program to implement the air conditioner compressor frequency control method as described in any of the foregoing embodiments. The technical effects of the air conditioner provided by the embodiments of the present invention are similar to those of the air conditioner compressor frequency control method; it can prevent the frequency ramp-up rate from becoming too fast and can effectively adjust the ramp-up rate, optimizing the compressor's frequency ramp-up rhythm, minimizing the triggering of the exhaust temperature protection mechanism, thereby improving the compressor's frequency fluctuation problem and enhancing the user experience. Attached Figure Description

[0031] Figure 1 A flowchart illustrating the frequency control method for an air conditioner compressor provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the frequency increase process in the segmented frequency increase mode in the air conditioner compressor frequency control method provided in the embodiment of the present invention;

[0033] Figure 3 for Figure 1 A flowchart illustrating the sub-steps of step S200 in the process;

[0034] Figure 4 A schematic flowchart of S510 to S530 of an air conditioner compressor frequency control method provided for some embodiments of the present invention;

[0035] Figure 5 A schematic flowchart of steps S610 to S620 of an air conditioner compressor frequency control method provided for some embodiments of the present invention;

[0036] Figure 6This is a schematic block diagram of the structure of an air conditioner compressor frequency control device provided in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 200 - Air conditioner compressor frequency control device; 210 - Frequency increase control module; 220 - Correction control module; 230 - Correction exit control module; 240 - Correction re-entry control module; 250 - Platform number and frequency calculation module; 260 - Platform number judgment module. Detailed Implementation

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Please see Figure 1 and Figure 2 This invention provides a compressor frequency control method for an air conditioner, applicable to an air conditioner, which may be an inverter air conditioner. This compressor frequency control method prevents the compressor's frequency increase rate from becoming too rapid, effectively adjusting the rate of frequency increase to improve the compressor's frequency fluctuation problem. The compressor frequency control method includes the following steps:

[0041] Step S100: After the air conditioner is turned on for the Nth time, the compressor frequency is controlled to maintain a first dwell time at at least one first frequency platform during the process of frequency increase in segmented frequency increase mode until the frequency is increased to a stable operating frequency, where N is a positive integer greater than or equal to 1.

[0042] In step S100, N is a positive integer greater than or equal to 1. When N = 1, the Nth time the air conditioner is turned on can be considered the first time the air conditioner is turned on; when N ≥ 2, the Nth time the air conditioner is turned on represents the 2nd, 3rd, 4th, 5th, and so on. The segmented frequency ramp-up mode means that the compressor frequency is increased from the initial frequency at a preset ramp-up rate, and during the ramp-up process, the frequency maintains a corresponding dwell time at at least one frequency platform. Each time the frequency platform is maintained for a corresponding dwell time, the frequency ramp-up continues, alternating between ramp-up and maintenance until a stable operating frequency is reached. The number of frequency platforms can be one or more, for example, 2, 3, 4, 5, and so on, and can be set according to actual needs. In this embodiment, for ease of explanation, the frequency platform in the segmented frequency ramp-up process after the Nth time the air conditioner is turned on is called the first frequency platform, and the corresponding dwell time is called the first dwell time. It should be understood that, depending on the number of platforms, the number of first frequency platforms can be one or more, and similarly, the number of first dwell times can be one or more. In this embodiment, three platforms can be used as an example, meaning there are three first frequency platforms and three first dwell times. Furthermore, in the segmented frequency ramping mode, excluding the dwell time at each frequency platform, the remaining frequency ramping process proceeds at a preset ramping rate. The preset ramping rates between adjacent frequency platforms can be the same or different. In this embodiment, when the entire frequency ramping process proceeds at the preset ramping rate, the preset ramping rate is the same for each stage. Additionally, the stable operating frequency is the highest operating frequency reached by the compressor when the air conditioner is running stably and freely, and can be represented by fm.

[0043] For air conditioners, given a fixed total amount of refrigerant in the system, and under specific frequency, ambient temperature, load rate, and exhaust temperature, the exhaust temperature is also constant. Higher frequency results in higher exhaust temperature, showing a positive correlation. Therefore, the compressor's frequency increase can reflect the rise in exhaust temperature. By setting a frequency plateau during the frequency increase process and maintaining operation at that plateau for a corresponding duration before continuing to increase the frequency until it reaches the stable operating frequency for the compressor under current conditions, the frequency increase rate can be prevented from being too rapid, minimizing the triggering of exhaust temperature protection control and improving frequency fluctuation issues.

[0044] Step S200: After the air conditioner is turned on for the N+1th time, the first dwell time is corrected according to the exhaust temperature at the platform start point to obtain the second dwell time. The compressor frequency is controlled to maintain the second dwell time at at least one second frequency platform during the frequency increase process in the segmented frequency increase mode until the frequency is increased to a stable operating frequency, so that the compressor exhaust temperature is within the preset range. The exhaust temperature at the platform start point represents the exhaust temperature when the actual operating frequency of the compressor during the frequency increase process reaches the second frequency platform corresponding to the first frequency platform.

[0045] In step S200, it should be noted that the Nth and N+1th startups mentioned in this embodiment do not refer to a specific startup, but rather to one startup preceding the other in two adjacent startups. That is, the N+1th startup of the air conditioner represents the startup following the Nth startup, and the Nth startup represents the startup preceding the N+1th startup. Thus, the second dwell time is obtained by correcting the first dwell time based on the exhaust temperature at the platform's starting point. This means that the dwell time after the subsequent startup is a correction based on the dwell time of the previous startup. Furthermore, in this embodiment, for ease of explanation, the frequency platform in the segmented frequency ramp-up process after the N+1th startup of the air conditioner is referred to as the second frequency platform, and the corresponding dwell time is referred to as the second dwell time. It should be understood that the number of second frequency platforms can be one or more, and similarly, the number of second dwell times can be one or more.

[0046] Additionally, it should be noted that the platform starting point exhaust temperature represents the exhaust temperature when the actual operating frequency of the compressor reaches the second frequency platform corresponding to the first frequency platform during the frequency ramp-up process. The platform starting point exhaust temperature is denoted by Td. It should be understood that the platform starting point exhaust temperature Td is the instantaneous temperature when the compressor's actual operating frequency reaches the second frequency platform. The correspondence between the second frequency platform and the first frequency platform means that the sequence number of the second frequency platform experienced by the compressor during the segmented frequency ramp-up process after the (N+1)th start-up is the same as the sequence number of the first frequency platform experienced by the compressor during the segmented frequency ramp-up process after the Nth start-up. As an example, during the frequency ramp-up process after the Nth power-on, there are three first frequency platforms, ordered from lowest to highest frequency, and denoted by serial numbers A1, A2, and A3. Similarly, during the (N+1)th power-on, there are three second frequency platforms, ordered from lowest to highest frequency, and denoted by serial numbers B1, B2, and B3. Therefore, the correspondence between the second and first frequency platforms is as follows: second frequency platform B1 corresponds to first frequency platform A1, second frequency platform B2 corresponds to first frequency platform A2, and second frequency platform B3 corresponds to first frequency platform A3. Second frequency platform B1 is a modification of first frequency platform A1, and so on.

[0047] In this embodiment of the invention, by modifying the first dwell time during the frequency ramp-up process after the previous startup to obtain the second dwell time, the frequency platform can be gradually adjusted to achieve a better frequency ramp-up rhythm. Thus, by adjusting the dwell time on the frequency platform, the speed of frequency ramp-up can be effectively adjusted, optimizing the compressor's frequency ramp-up rhythm, minimizing the triggering of the exhaust temperature protection mechanism, thereby improving the compressor's frequency fluctuation problem and enhancing the user experience.

[0048] Additionally, it should be noted that when N=1, the air conditioner is turned on for the first time. Since no correction has been performed, the first dwell time is set to the preset initial dwell time, meaning the initial dwell time is the set value, for example, 60s. The (N+1)th turn-on is the second turn-on. During the frequency increase process, the second dwell time is corrected based on the preset initial dwell time. At this time, the number of corrections i=1, meaning one correction has been performed.

[0049] When N=2, the Nth start-up of the air conditioner represents the 2nd start-up. The first dwell time during the frequency increase process is the second dwell time obtained from the previous correction. The (N+1)th start-up is the 3rd start-up. The second dwell time during the frequency increase process is corrected based on the first dwell time during the 2nd start-up frequency increase process. The number of corrections at this time is i=2, meaning that after each correction, the number of corrections i=i. 前一次 +1. In this way, the number of corrections is calculated iteratively.

[0050] When N=3, the Nth start-up of the air conditioner represents the 3rd start-up. The first dwell time during the frequency increase process at this time is the second dwell time obtained from the previous correction. The (N+1)th start-up is the 4th start-up. The second dwell time during the frequency increase process is corrected based on the first dwell time during the frequency increase process of the 3rd start-up. The number of corrections at this time is i=3, meaning that after each correction, the number of corrections i=i. 前一次 +1. In this way, the number of corrections is calculated iteratively.

[0051] The cases when N = 4, 5, ... can be deduced by analogy with the cases introduced earlier, and will not be repeated here.

[0052] Furthermore, the inventors of this invention discovered during their research that setting the dwell time too long results in a slow increase in frequency, failing to achieve the user's expected fast and comfortable experience; setting the dwell time too short leads to unstable frequency control, resulting in a poor user experience later on. Please refer to [link / reference]. Figure 3 In order to better correct the dwell time, in this embodiment, the step of correcting the first dwell time based on the exhaust temperature at the platform starting point to obtain the second dwell time in step S200 may include the following sub-steps S210 to S230.

[0053] Sub-step S210: If the exhaust temperature at the platform's starting point is greater than the first preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time plus the first preset time.

[0054] In sub-step S210, the first preset time is represented by a1, and the first preset exhaust temperature is represented by b1. Both the first preset time and the first preset exhaust temperature are preset values, which are set according to actual needs. During correction, the temperature range of the exhaust temperature at the platform's starting point is judged. If the exhaust temperature at the platform's starting point is greater than the first preset exhaust temperature, it can be considered that the exhaust temperature at the platform's starting point is too high, the frequency rises too quickly, and it is easy to trigger the exhaust temperature protection mechanism. At this time, the dwell time can be increased. Therefore, the second dwell time t2 is calculated to be equal to the first dwell time t1 plus the first preset time a1. That is, if Td > b1, then t2 = t1 + a1.

[0055] In sub-step S220, if the exhaust temperature at the platform's starting point is less than the second preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time minus the second preset time.

[0056] In sub-step S220, the second preset time is represented by a2, and the second preset exhaust temperature is represented by b2. Both the second preset time and the second preset exhaust temperature are preset values, which are set according to actual needs. During correction, the temperature range of the exhaust temperature at the platform's starting point is judged. If the exhaust temperature at the platform's starting point is less than the second preset exhaust temperature, it can be considered that the exhaust temperature at the platform's starting point is too low, the frequency rises too slowly, and the expected fast and comfortable experience cannot be achieved. In this case, the dwell time can be reduced. Therefore, the second dwell time t2 is calculated to be equal to the first dwell time t1 minus the second preset time a2. That is, if Td < b2, then t2 = t1 - a2.

[0057] It should be noted that after sub-step S220, if the second dwell time decreases to 0s, the second dwell time will no longer decrease and will remain at 0s. Thus, when the second dwell time decreases to 0s, the dwell time of the frequency platform will no longer be adjusted downwards.

[0058] In sub-step S230, if the exhaust temperature at the platform's starting point is greater than or equal to the second preset exhaust temperature and less than or equal to the first preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time.

[0059] In sub-step S230, during the correction, the temperature range of the exhaust temperature at the platform's starting point is judged. If the exhaust temperature at the platform's starting point is greater than or equal to the second preset exhaust temperature and less than or equal to the first preset exhaust temperature, then the exhaust temperature can be considered to be within a suitable temperature range and the frequency of increase is reasonable. In this case, no dwell time is adjusted. Therefore, the second dwell time t2 is calculated to be equal to the first dwell time t1. That is, if b2≤Td≤b1, then t2=t1.

[0060] Additionally, it should be noted that the aforementioned sub-steps S210 to S230 can be considered as corrections made for the second dwell time of a single second frequency platform. When the number of second frequency platforms is greater than or equal to 2, the aforementioned sub-steps S210 to S230 can be repeatedly executed for the correction of the second dwell time of each second frequency platform to achieve correction based on the corresponding first dwell time. Furthermore, when correcting multiple second dwell times, the first preset time for multiple second dwell time corrections can be the same or different; similarly, the second preset time can be the same or different, and can be adjusted according to actual needs. In this embodiment, the first preset time for multiple second dwell time corrections is the same, for example, all can be 30s; the second preset time is also the same, for example, all can be 30s. Furthermore, the first preset exhaust temperature and the second preset exhaust temperature corresponding to multiple frequency platforms both increase with the increase of the frequency platform. In this embodiment, taking three second frequency platforms as an example, the first preset exhaust temperature of the second frequency platform B1 during correction can be selected as 30°C, and the second preset exhaust temperature can be selected as 20°C; the first preset exhaust temperature of the second frequency platform B2 during correction can be selected as 40°C, and the second preset exhaust temperature can be selected as 30°C; the first preset exhaust temperature of the second frequency platform B3 during correction can be selected as 50°C, and the second preset exhaust temperature can be selected as 40°C.

[0061] As an example, when N=1, the first dwell time of the air conditioner when it is turned on for the first time is set to the preset initial dwell time, such as 60s. The (N+1)th turn-on is the second turn-on, and the second frequency platform has 3, at which time the correction number i=1.

[0062] At this point, regarding the first correction:

[0063] For the second frequency platform B1: when Td > 30℃, a correction is made, t2 = 60 + 30 = 90s; when Td < 20℃, a negative correction is made, t2 = 60 - 30 = 30s; when 20℃ ≤ Td ≤ 30℃, no correction is made, t2 = 60s.

[0064] For the second frequency platform B2: when Td > 40℃, a correction is made, t2 = 60 + 30 = 90s; when Td < 30℃, a negative correction is made, t2 = 60 - 30 = 30s; when 30℃ ≤ Td ≤ 40℃, no correction is made, t2 = 60s.

[0065] For the second frequency platform B3: when Td > 50℃, a correction is made, t2 = 60 + 30 = 90s; when Td < 40℃, a negative correction is made, t2 = 60 - 30 = 30s; when 40℃ ≤ Td ≤ 50℃, no correction is made, t2 = 60s.

[0066] Similarly, when N=2, the Nth time the air conditioner is turned on represents the second time it is turned on. At this time, the first dwell time during the frequency increase process is the second dwell time obtained during the first correction. The (N+1)th time it is turned on represents the third time it is turned on, and the number of corrections at this time is i=2.

[0067] At this point, regarding the second revision:

[0068] For the second frequency platform B1: when Td > 30℃, a correction is made, t2 = 90 + 30 = 120s; when Td < 20℃, a negative correction is made, t2 = 30 - 30 = 0s; when 20℃ < Td < 30℃, no correction is made, and t2 remains the original data.

[0069] For the second frequency platform B2: when Td > 40℃, a correction is made, t2 = 90 + 30 = 120s; when Td < 30℃, a negative correction is made, t2 = 30 - 30 = 0s; when 30℃ < Td < 40℃, no correction is made, and t2 remains the original data.

[0070] For the second frequency platform B3: when Td > 50℃, a correction is made, t2 = 90 + 30 = 120s; when Td < 40℃, a negative correction is made, t2 = 30 - 30 = 0s; when 40℃ < Td < 50℃, no correction is made, and t2 remains the original data.

[0071] Please continue reading. Figure 1 In addition, in order to make better corrections, this embodiment optimizes the exit step of correction control. For example, after step S200, the air conditioner compressor frequency control method further includes step S300.

[0072] Step S300: If all the corrected second dwell times are equal to all the corresponding first dwell times during the compressor's frequency ramp-up process in segmented frequency ramp-up mode after the previous start-up, then control the compressor to exit the correction control and set the correction count to zero.

[0073] In step S300, it should be understood that since the 3rd, 4th, 5th... correction (correction number i = 3, 4, 5...) determination is entered during the next startup, the dwell time remains the data after the 2nd, 3rd, 4th... correction. Therefore, if all the second dwell times obtained by correction are equal to all the corresponding first dwell times during the compressor's frequency increase in segmented frequency increase mode after the previous startup, it can be considered that the exhaust temperature corresponding to all the second frequency platforms is within a suitable temperature range, the frequency increase rhythm is reasonable, and no further correction is needed. At this time, the compressor is controlled to exit the correction control, and the correction number i is set to zero.

[0074] In addition, for better control, this embodiment includes a re-entry correction determination step. For example, after step S300, the air conditioner compressor frequency control method further includes step S400.

[0075] Step S400: After the Kth startup following the exit of correction control, the compressor is controlled to re-enter correction control and the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time is executed, where K is a positive integer greater than or equal to 1.

[0076] In step S400, after the Kth startup following the exit of correction control (i.e., after a certain period of time), if correction needs to be determined again, the compressor is controlled to re-enter correction control, and step S200 is executed. Here, K is a set value, set according to actual needs; optionally, K = 3.

[0077] As an example, if the dwell time of each frequency platform is equal during the 11th and 10th power-on runs, the correction stops. During the 14th run, the correction process re-enters the process. If the dwell time of each frequency platform is equal to that of the 13th run, the correction stops. The correction process is repeated during the 17th run.

[0078] It should be noted that if the frequency ramp rate becomes abnormal during each power-on run after the above-mentioned exit correction, it can immediately enter the correction phase.

[0079] Please see Figure 4 Furthermore, to better determine the number of frequency platforms, in this embodiment, the number of platforms and the corresponding frequency of each platform are set and calculated after each start-up of the air conditioner. That is, steps S510 to S530 are executed before steps S100 and S200. The air conditioner compressor frequency control method also includes:

[0080] Step S510: After the air conditioner is turned on at any time, obtain the outer ambient temperature of the air conditioner.

[0081] In step S510, the outer ring temperature is acquired before steps S100 and S200 for subsequent plateau number setting, where the outer ring temperature is represented by Tao.

[0082] Step S520: Determine the number of frequency platforms during the process of the compressor increasing its frequency to a stable operating frequency in a segmented frequency-increasing mode, based on the outer ring temperature.

[0083] In step S520, after each stable startup and operation, fm is recorded. fm is correlated with the outer ring temperature Tao; within a certain temperature range, the higher Tao is, the smaller fm is. Therefore, in this embodiment, the number of platforms is determined based on the temperature range of the outer ring temperature, and the higher the outer ring temperature, the smaller the number of platforms is set.

[0084] Step S530: Calculate the frequency corresponding to the frequency platform based on the number of platforms and the stable operating frequency.

[0085] In step S530, the frequency corresponding to each frequency platform is equal to [the serial number of the frequency platform / (the number of platforms + 1)] * the stable operating frequency.

[0086] In this embodiment, the number of platforms is set within the range of 0 to 55°C for the outer ring temperature.

[0087] 1) If Tao∈(50℃, 55℃), and fm∈(20Hz, 50Hz), then by default, one platform is set, and the frequency platform corresponds to frequency 1 / 2fm.

[0088] 2) If Tao∈(45℃, 50℃), fm∈(50Hz, 80Hz), then by default, two platforms are set, and the frequency platforms correspond to frequencies 1 / 3fm and 2 / 3fm.

[0089] 3) If Tao∈(40℃, 45℃), fm∈(80Hz, 110Hz), then 3 platforms are set by default, and the frequency platforms correspond to frequencies 1 / 4fm, 2 / 4fm, and 3 / 4fm.

[0090] 4) If Tao∈(0℃, 40℃), and fm∈(110Hz, ∞), then by default, 4 platforms are set, and the frequency platforms correspond to frequencies 1 / 5fm, 2 / 5fm, 3 / 5fm, and 4 / 5fm.

[0091] It should be noted that sub-steps S510 to S530 are executed before both steps S100 and S200. Executing sub-steps S510 to S530 before step S100 yields the number of first frequency platforms and the corresponding frequencies for each first frequency platform. Executing sub-steps S510 to S530 before step S200 yields the number of second frequency platforms and the corresponding frequencies for each second frequency platform.

[0092] Please see Figure 5 In addition, to facilitate correction, after the N+1th start-up and after completing the above steps S510 to S530, the air conditioner compressor frequency control method further includes the following steps S610 to S620.

[0093] Step S610: After the air conditioner is turned on for the N+1th time, determine whether the number of platforms of the second frequency platform is the same as the number of platforms of the first frequency platform.

[0094] If so, then the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time is executed, i.e., the number of platforms in the second frequency platform is the same as the number of platforms in the first frequency platform, and step S200 is executed. In this way, the number of platforms after the two power-ups is the same, and the correction can be based on the first dwell time corresponding to the previous power-up, making the correction more accurate.

[0095] Step S620: If not, then set the second dwell time to the preset initial dwell time.

[0096] In step S620, if the number of platforms of the second frequency platform is different from the number of platforms of the first frequency platform, the second dwell time is set to a preset initial dwell time, for example, the second dwell time is set to 60s, and the correction count is set to zero.

[0097] In summary, the air conditioner compressor frequency control method provided in this embodiment of the invention, by setting a frequency platform (e.g., a first frequency platform and a second frequency platform) during the frequency ramp-up process, and maintaining a corresponding dwell time on the frequency platform (e.g., a first dwell time and a second dwell time), and then continuing to ramp up the frequency until it reaches the stable operating frequency of the compressor under the current conditions, can prevent the frequency ramp-up rate from becoming too fast. Furthermore, after the air conditioner is turned on for the N+1th time, the second dwell time can be obtained by adjusting the first dwell time during the previous startup of the compressor in the segmented frequency ramp-up mode based on the exhaust temperature at the platform's starting point. This adjustment of the dwell time on the frequency platform effectively regulates the frequency ramp-up rate, optimizes the compressor's frequency ramp-up rhythm, minimizes the triggering of the exhaust temperature protection mechanism, thereby improving the compressor's frequency fluctuation problem and enhancing the user experience.

[0098] Please see Figure 6To execute the possible steps of the air conditioner compressor frequency control method provided in the above embodiments, this embodiment of the invention provides an air conditioner compressor frequency control device 200, applied to an air conditioner, for executing the above-described air conditioner compressor frequency control method. It should be noted that the basic principle and technical effects of the air conditioner compressor frequency control device 200 provided in this embodiment are basically the same as those in the above embodiments. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the above embodiments.

[0099] The air conditioner compressor frequency control device 200 provided in this embodiment of the invention includes a frequency increase control module 210, a correction control module 220, a correction exit control module 230, a correction re-entry control module 240, a platform number and frequency calculation module 250, and a platform number judgment module 260.

[0100] The frequency ramp control module 210 is used to control the compressor frequency to maintain a first dwell time at at least one first frequency platform until the frequency is ramped up to a stable operating frequency during the process of ramping up the compressor in a segmented frequency ramp mode after the air conditioner is turned on for the Nth time, where N is a positive integer greater than or equal to 1.

[0101] In this embodiment, the up-frequency control module 210 is used to execute step S100 in the above method to achieve the corresponding technical effect.

[0102] The correction control module 220 is used to correct the first dwell time based on the exhaust temperature at the platform start point after the air conditioner is turned on for the N+1th time to obtain a second dwell time, and to control the compressor frequency to maintain the second dwell time at at least one second frequency platform during the frequency increase process in the segmented frequency increase mode until the frequency is increased to a stable operating frequency, so that the exhaust temperature of the compressor is within a preset range, wherein the exhaust temperature at the platform start point represents the exhaust temperature when the actual operating frequency of the compressor during the frequency increase process reaches the second frequency platform corresponding to the first frequency platform.

[0103] In this embodiment, the correction control module 220 is used to execute step S200 and its sub-steps in the above method to achieve the corresponding technical effect.

[0104] The correction exit control module 230 is used to control the compressor to exit the correction control and set the correction count to zero if all the second dwell times obtained by correction are equal to all the corresponding first dwell times during the compressor's frequency increase in segmented frequency increase mode after the previous start-up.

[0105] In this embodiment, the modified exit control module 230 is used to execute step S300 in the above method to achieve the corresponding technical effect.

[0106] The correction re-entry control module 240 is used to control the compressor to re-enter the correction control after the Kth startup following the exit of the correction control, and to perform the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time, where K is a positive integer greater than or equal to 1.

[0107] In this embodiment, the modified re-entry control module 240 is used to execute step S400 in the above method to achieve the corresponding technical effect.

[0108] The platform number and frequency calculation module 250 is used to obtain the outer ring temperature of the air conditioner after any one start-up of the air conditioner, and is also used to determine the number of frequency platforms in the process of the compressor increasing the frequency to the stable operating frequency in the segmented frequency increase mode based on the outer ring temperature; and to calculate the frequency corresponding to the frequency platform based on the number of platforms and the stable operating frequency.

[0109] In this embodiment, the platform number and frequency calculation module 250 is used to execute steps S510 to S530 in the above method to achieve the corresponding technical effects.

[0110] The platform number determination module 260 is used to determine whether the platform number of the second frequency platform is the same as the platform number of the first frequency platform after the air conditioner is turned on for the N+1th time. If so, step S200 is executed; otherwise, the second dwell time is set to the preset initial dwell time.

[0111] In this embodiment, the platform number determination module 260 is used to execute steps S610 to S620 in the above method to achieve the corresponding technical effect.

[0112] In addition, embodiments of the present invention also provide an air conditioner, including a controller, which is used to execute computer instructions to implement the air conditioner compressor frequency control method provided in the embodiments of the present invention.

[0113] The controller can be an integrated circuit chip with signal processing capabilities. The aforementioned controller can be a general-purpose processor, including a central processing unit (CPU), or a microcontroller, microcontroller unit (MCU), complex programmable logic device (CPLD), field-programmable gate array (FPGA), application-specific integrated circuit (ASIC), embedded ARM, etc. The controller can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention.

[0114] In one feasible implementation, the air conditioner may further include a memory for storing program instructions executable by the controller. For example, the air conditioner compressor frequency control device 200 provided in this application embodiment includes at least one programmable instruction stored in the memory in the form of software or firmware. The memory may be a separate external memory, including but not limited to Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), and Electrically Erasable Programmable Read-Only Memory (EEPROM). The memory may also be integrated with the controller; for example, the memory may be integrated with the controller within the same chip.

[0115] In summary, the air conditioner compressor frequency control method, device, and air conditioner provided in this embodiment of the invention, by setting a frequency plateau during the frequency ramp-up process and maintaining operation on the frequency plateau for a corresponding dwell time before continuing to ramp up the frequency until it reaches the stable operating frequency for the compressor under the current conditions, can prevent the frequency ramp-up rate from becoming too fast. Furthermore, after the air conditioner is turned on for the N+1th time, a second dwell time can be obtained by adjusting the first dwell time during the segmented frequency ramp-up process of the compressor in the previous start-up based on the exhaust temperature at the plateau's starting point. This adjustment of the dwell time on the frequency plateau effectively regulates the frequency ramp-up rate, optimizes the compressor's frequency ramp-up rhythm, minimizes the triggering of the exhaust temperature protection mechanism, and thus improves the compressor's frequency fluctuation problem, enhancing the user experience.

[0116] In the several embodiments provided in this application, 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 present 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.

[0117] 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.

[0118] 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.

[0119] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A method for controlling the frequency of an air conditioner compressor, characterized in that, The method includes: After the air conditioner is turned on for the Nth time, the compressor frequency is controlled to increase in a segmented frequency increase mode, and a first dwell time is maintained at at least one first frequency platform until the frequency is increased to a stable operating frequency, where N is a positive integer greater than or equal to 1. After the air conditioner is turned on for the N+1th time, the first dwell time is corrected according to the exhaust temperature at the platform start point to obtain a second dwell time. During the process of frequency increase of the compressor in the segmented frequency increase mode, the second dwell time is maintained at at least one second frequency platform until the frequency is increased to the stable operating frequency, so that the exhaust temperature of the compressor is within a preset range. The exhaust temperature at the platform start point represents the exhaust temperature when the actual operating frequency of the compressor during the frequency increase process reaches the second frequency platform corresponding to the first frequency platform. The step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time includes: If the exhaust temperature at the platform's starting point is greater than the first preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time plus the first preset time. If the exhaust temperature at the platform's starting point is less than the second preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time minus the second preset time. If the exhaust temperature at the platform's starting point is greater than or equal to the second preset exhaust temperature and less than or equal to the first preset exhaust temperature, then the second dwell time is calculated to be equal to the first dwell time.

2. The air conditioner compressor frequency control method according to claim 1, characterized in that, After the step of calculating the second dwell time as equal to the first dwell time minus the second preset time, the method further includes: If the second dwell time is reduced to 0s, then the second dwell time is controlled to no longer decrease and is maintained at 0s.

3. The air conditioner compressor frequency control method according to claim 1, characterized in that, After the step of correcting the first residence time based on the exhaust temperature at the platform's starting point to obtain the second residence time, the method further includes: If all the corrected second dwell times are equal to all the corresponding first dwell times during the compressor's frequency ramping process in the segmented frequency ramping mode after the previous start-up, then the compressor is controlled to exit the correction control and the correction count is set to zero.

4. The air conditioner compressor frequency control method according to claim 3, characterized in that, After the step of controlling the compressor to exit correction control, the method further includes: After the Kth startup following the exit of correction control, the compressor is controlled to re-enter correction control and the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time is executed, where K is a positive integer greater than or equal to 1.

5. The air conditioner compressor frequency control method according to claim 1, characterized in that, The method further includes: After the air conditioner is turned on at any time, the outer ambient temperature of the air conditioner is obtained; The number of frequency platforms during the process of the compressor increasing its frequency to the stable operating frequency in the segmented frequency increase mode is determined based on the outer ring temperature. The frequency corresponding to the frequency platform is calculated based on the number of platforms and the stable operating frequency.

6. The air conditioner compressor frequency control method according to claim 1, characterized in that, The method further includes: After the air conditioner is turned on for the N+1th time, it is determined whether the number of platforms of the second frequency platform is the same as the number of platforms of the first frequency platform. If so, then the step of correcting the first dwell time based on the exhaust temperature at the platform's starting point to obtain the second dwell time is performed; If not, then the second dwell time will be set to the preset initial dwell time.

7. A frequency control device for an air conditioner compressor, characterized in that, The apparatus is used to perform the air conditioner compressor frequency control method as described in any one of claims 1-6, the apparatus comprising: The frequency ramp control module is used to control the compressor frequency to maintain a first dwell time at at least one first frequency platform during the process of ramping up the frequency in a segmented frequency ramp mode after the air conditioner is turned on for the Nth time, until the frequency is ramped up to a stable operating frequency, where N is a positive integer greater than or equal to 1; The correction control module is used to correct the first dwell time to obtain a second dwell time based on the exhaust temperature at the platform starting point after the air conditioner is turned on for the N+1th time, and to control the compressor frequency to maintain the second dwell time at at least one second frequency platform during the frequency increase process in the segmented frequency increase mode until the frequency is increased to a stable operating frequency, so that the exhaust temperature of the compressor is within a preset range, wherein the exhaust temperature at the platform starting point represents the exhaust temperature when the actual operating frequency of the compressor during the frequency increase process reaches the second frequency platform corresponding to the first frequency platform.

8. An air conditioner, characterized in that, The system includes a controller for executing a computer program to implement the air conditioner compressor frequency control method as described in any one of claims 1-6.

Images