Compressor frequency increase control method, controller, air conditioner and storage medium

Abstract

The present invention discloses a frequency-up control method, a controller, an air conditioner and a storage medium for a compressor, wherein the frequency-up control method includes obtaining an ambient temperature and determining a target frequency according to the ambient temperature; when the target frequency is less than a first frequency of a first frequency-upgrading platform, controlling the compressor to reside on the first frequency-upgrading platform and then reduce the frequency to the target frequency; when the target frequency is greater than the first frequency and less than a second frequency of a second frequency-upgrading platform, controlling the compressor to reside on the first frequency-upgrading platform and then increase the frequency to the target frequency according to a first preset condition; when the target frequency is greater than the second frequency, controlling the compressor to reside on the first frequency-upgrading platform and then increase the frequency to the second frequency according to the first preset condition, and controlling the compressor to reside on the second frequency-upgrading platform and then increase the frequency to the target frequency according to the first preset condition, wherein the first preset condition adopts different frequency-up determination conditions according to different cooling and heating working conditions, thereby realizing rapid frequency-upgrading of the compressor and shortening the startup process.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a frequency-up control method of a compressor, a controller, an air conditioner, and a storage medium. Background Art

[0002] Currently, in the household air-conditioning market, variable-frequency air-conditioning has gradually increased its market share due to its energy-saving and comfort effects. However, the compressor of the existing variable-frequency air-conditioning needs to go through multiple frequency-upgrading platforms from startup to reaching the target frequency. Each frequency-upgrading platform corresponds to a corresponding platform time, which results in the variable-frequency air-conditioning taking a long time to start up and the cooling or heating effect is relatively poor. In particular, in order to ensure the oil return and stability of the compressor under low-temperature heating conditions, a higher target frequency is usually set for the DC variable-frequency compressor, resulting in a large number of frequency-upgrading platforms, which affects the user experience. Summary of the Invention

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0004] The embodiments of the present invention provide a compressor frequency increase control method, a controller, an air conditioner, and a storage medium. Different frequency increase judgment conditions are adopted according to different cooling and heating working conditions to achieve rapid frequency increase of the compressor and shorten the startup process.

[0005] An embodiment of a first aspect of the present invention provides a method for controlling frequency increase of a compressor, comprising:

[0006] Acquiring an ambient temperature and determining a target frequency according to the ambient temperature;

[0007] When the target frequency is lower than the first frequency of the first frequency-increasing platform, controlling the compressor to stay at the first frequency-increasing platform and then reduce the frequency to the target frequency;

[0008] When the target frequency is greater than the first frequency and less than the second frequency of the second frequency-upgrading platform, controlling the compressor to reside on the first frequency-upgrading platform and then upgrading the frequency to the target frequency according to a first preset condition;

[0009] When the target frequency is greater than the second frequency, controlling the compressor to stay at the first frequency-upgrading platform and then upgrading to the second frequency according to the first preset condition, and controlling the compressor to stay at the second frequency-upgrading platform and then upgrading to the target frequency according to the first preset condition;

[0010] in,

[0011] In the cooling mode, the first preset condition is that the exhaust temperature of the compressor is lower than the first exhaust temperature or the evaporator coil temperature is higher than the first evaporator coil temperature;

[0012] In the heating condition, the first preset condition is that the exhaust temperature of the compressor is lower than the first exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is lower than the first temperature difference.

[0013] The air conditioner according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: during the startup of the compressor, the target frequency of the compressor is first determined, the target frequency is compared with the frequency corresponding to the platform, and the frequency increase control method of the compressor during the startup process is determined, wherein, according to the cooling and heating requirements of the compressor, different judgment conditions are used to determine the frequency increase method of the compressor between the frequency increase platforms, thereby avoiding the problem of the compressor taking a long time to start up, improving the cooling effect or heating effect of the variable frequency air conditioner at startup, realizing rapid frequency increase of the compressor, shortening the startup process, and improving user experience.

[0014] In some embodiments, obtaining the ambient temperature and determining the target frequency according to the ambient temperature includes:

[0015] Under cooling conditions, obtaining an outdoor ambient temperature and determining a target frequency according to the outdoor ambient temperature;

[0016] Under the heating condition, the outdoor ambient temperature and the indoor ambient temperature are obtained, and the target frequency is determined according to the outdoor ambient temperature and the indoor ambient temperature.

[0017] The target frequency of the startup process is determined in different ways according to the different cooling and heating needs. The outdoor temperature is considered in the cooling condition, and the indoor and outdoor temperatures are considered in the heating condition, so as to determine the target frequency suitable for compressor startup.

[0018] In some embodiments, controlling the compressor to reside on the first frequency-increasing platform and then frequency-down to the target frequency includes:

[0019] controlling the compressor to operate at the first frequency for a first period of time;

[0020] The compressor is controlled to reduce the frequency to the target frequency.

[0021] When the target frequency is lower than the first frequency corresponding to the first frequency-upgrading platform, in order to enable rapid cooling or heating during the startup process, the compressor is frequency-upgraded to the first frequency and maintained for a first period of time, and then frequency-downgraded to the target frequency for stable operation.

[0022] In some embodiments, controlling the compressor to reside on the first frequency-upgrading platform and then upgrading the frequency to the target frequency according to a first preset condition comprises:

[0023] controlling the compressor to operate at the first frequency for a first period of time;

[0024] When a first preset condition is met, controlling the compressor to increase the frequency to the target frequency;

[0025] When the first preset condition is not met, the compressor is controlled to maintain the first frequency operation until a second preset condition is met, and the compressor is controlled to increase the frequency to the target frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

[0026] During the process of the compressor frequency increasing through the first frequency increasing platform, after staying at the first frequency increasing platform for a first period of time, it is determined based on a first preset condition indicating the current operating temperature whether the compressor maintains the current frequency or continues to increase the frequency. If the compressor continues to operate at the current frequency, the second preset condition indicating the current operating temperature is continuously determined during operation. If the second preset condition is met, the compressor is allowed to increase the frequency to the target frequency.

[0027] In some embodiments, controlling the compressor to reside on the first frequency-upgrading platform and then upgrading the frequency to the second frequency according to the first preset condition includes:

[0028] controlling the compressor to operate at the first frequency for a first period of time;

[0029] When the first preset condition is met, controlling the compressor to increase the frequency to the second frequency;

[0030] When the first preset condition is not met, the compressor is controlled to maintain the first frequency operation until a second preset condition is met, and the compressor is controlled to increase the frequency to the second frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

[0031] During the process of the compressor frequency increasing through the first frequency increasing platform and the second frequency increasing platform, after staying at the first frequency increasing platform for a first time period, a determination is made based on a first preset condition indicating the current operating temperature whether the compressor should maintain the current frequency or increase the frequency to the second frequency increasing platform. If the compressor continues to operate at the current frequency, the second preset condition indicating the current operating temperature is continuously determined during operation. If the second preset condition is met, the compressor is allowed to increase the frequency to the second frequency increasing platform.

[0032] In some embodiments, controlling the compressor to reside on the second frequency-upgrading platform and then upgrading the frequency to the target frequency according to the first preset condition comprises:

[0033] controlling the compressor to operate at the second frequency for a second period of time;

[0034] When the first preset condition is met, controlling the compressor to increase the frequency to the target frequency;

[0035] When the first preset condition is not met, the compressor is controlled to maintain the second frequency operation until a second preset condition is met, and the compressor is controlled to increase the frequency to the target frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

[0036] After the compressor is frequency-upgraded to the second frequency-upgrade platform based on the above process, the first preset condition and the second preset condition are determined again in the above manner, thereby controlling the compressor to maintain the current operating frequency or frequency-upgrade to the target frequency.

[0037] In some embodiments, the second preset condition is determined according to the following method:

[0038] In the cooling condition, the second preset condition is that the exhaust temperature of the compressor is lower than the second exhaust temperature and the evaporator coil temperature is higher than the second evaporator coil temperature.

[0039] In the heating condition, the second preset condition is that the exhaust temperature of the compressor is lower than the second exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is lower than the second temperature difference.

[0040] The second preset condition is similar to the first preset condition, and is determined based on the temperature of a certain component of the air conditioner under the current operating conditions. Whether in cooling or heating conditions, the judgment can be made based on the size of the compressor exhaust temperature. In addition, in cooling conditions, the judgment can also be made by the evaporator coil temperature. In heating conditions, the judgment can also be made by calculating the difference between the outdoor ambient temperature and the condenser coil temperature.

[0041] In some embodiments, the first exhaust temperature is greater than the second exhaust temperature, the first evaporator coil temperature is less than the second evaporator coil temperature, and the first temperature difference is greater than the second temperature difference.

[0042] The first preset condition is used to determine whether the compressor has been preheated sufficiently. If the preheating is sufficient, the operating time of the current frequency can be extended. If the preheating is insufficient, the preheating efficiency is improved by increasing the frequency to achieve a stable operating temperature for the compressor. Thereafter, the second preset condition is used to determine whether the compressor is still at a stable operating temperature. Therefore, the set value of the second preset condition is lower than the set value of the first preset condition, so as to trigger the compressor to increase the frequency when the temperature drops and maintain a stable operating temperature.

[0043] A second aspect of the present invention provides a controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in the first aspect when executing the computer program.

[0044] A third aspect of the present invention provides an air conditioner, comprising the controller as described in the second aspect.

[0045] A fourth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions for executing the frequency increase control method as described in the first aspect.

[0046] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of a system architecture platform for executing a frequency up-conversion control method provided by an embodiment of the present invention;

[0048] Figure 2 This is an overall flow chart of a frequency increase control method for a compressor provided by an embodiment of the present invention;

[0049] Figure 3 is a flow chart of a frequency increase control method provided by an embodiment of the present invention when the target frequency is lower than the first frequency;

[0050] Figure 4 is a flow chart of a frequency up-conversion control method provided by an embodiment of the present invention when the target frequency is between the first frequency and the second frequency;

[0051] Figure 5 and Figure 6 is a flow chart of a frequency increase control method provided by an embodiment of the present invention when the target frequency is higher than the second frequency;

[0052] Figure 7 is a flow chart of the frequency up-conversion control method provided in Example 1 of the present invention;

[0053] Figure 8 is a flow chart of the frequency up-conversion control method provided in Example 2 of the present invention;

[0054] Figure 9 This is a flow chart of the frequency up-conversion control method provided in Example 3 of the present invention. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be exchanged or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various orders in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary order, unless otherwise specified that a certain order must be followed.

[0056] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0057] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0058] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0059] In the related art, variable-frequency air conditioners (VFAs) are gaining market share in the household air conditioning market due to their energy-saving and comfort benefits. However, existing VFAs require the compressor to run through multiple stages from startup to target frequency, resulting in a long time for the VFA to reach the target frequency. Specifically, existing VFAs generally use a DC VFA compressor startup method. To ensure oil return and stability during compressor startup, the compressor runs through multiple stages during the frequency ramp-up process, with each stage running for a certain period of time, especially under low-temperature heating conditions where the compressor target frequency is high. As a result, the compressor frequency takes a long time to reach the target frequency, resulting in poor heating performance during the initial heating phase.

[0060] Based on the above situation, an embodiment of the present invention provides a compressor frequency increase control method, a controller, an air conditioner, and a computer-readable storage medium. The compressor frequency increase control method includes but is not limited to the following steps:

[0061] The target frequency of the compressor is determined according to the ambient temperature, and the target frequency is compared with the frequencies corresponding to each frequency-upgrading platform. According to the size relationship between the target frequency and the frequencies corresponding to the frequency-upgrading platform, and according to the different cooling and heating requirements of the compressor, different frequency-upgrading judgment conditions are adopted to control the frequency-upgrading of the compressor, wherein the frequency-upgrading judgment condition includes a first preset condition. Under the cooling condition, the first preset condition is that the exhaust temperature of the compressor is less than the first exhaust temperature or the evaporator coil temperature is greater than the first evaporator coil temperature; under the heating condition, the first preset condition is that the exhaust temperature of the compressor is less than the first exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is less than the first temperature difference.

[0062] According to the technical solution of the embodiment of the present invention, the embodiment of the present invention can adopt different frequency increase control methods according to the target frequency of the compressor, the frequency of the frequency increase platform and different cooling and heating working conditions. Specifically, when the target frequency is less than the first frequency of the first frequency increase platform, it is first increased to the first frequency and then reduced to the target frequency; when the target frequency is between the first frequency and the second frequency of the second frequency increase platform, it first resides on the first frequency increase platform and then is frequency increased to the target frequency according to the first preset condition; when the target frequency is greater than the second frequency, it resides on the first frequency increase platform and the second frequency increase platform in turn, and then is frequency increased to the target frequency according to the first preset condition. The embodiment of the present invention is different from the prior art of controlling the compressor to run multiple upgrade platforms in sequence. The embodiment of the present invention uses the corresponding working conditions as the judgment conditions for triggering control, which can achieve rapid frequency increase of the compressor and shorten the startup process.

[0063] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0064] like Figure 1 As shown, Figure 1 Schematic diagram of a system architecture platform for executing a frequency-up control method for a compressor provided by an embodiment of the present invention.

[0065] The system architecture platform 1000 of the embodiment of the present invention includes one or more processors 1001 and a memory 1002. Figure 1 In the figure, a processor 1001 and a memory 1002 are taken as an example.

[0066] The processor 1001 and the memory 1002 may be connected via a bus or other means. Figure 1 The bus connection is taken as an example.

[0067] The memory 1002 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 1002 may optionally include a memory 1002 remotely located relative to the processor 1001, and these remote memories may be connected to the system architecture platform 1000 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0068] Those skilled in the art will understand that Figure 1 The device structure shown in the figure does not constitute a limitation on the system architecture platform 1000, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0069] exist Figure 1 In the system architecture platform 1000 shown, the processor 1001 can be used to call the compressor frequency increase control program stored in the memory 1002, thereby implementing the compressor frequency increase control method.

[0070] Based on the hardware structure of the above-mentioned system architecture platform 1000, various embodiments of the air conditioner of the present invention are proposed.

[0071] Specifically, the air conditioner of the embodiment of the present invention includes but is not limited to an indoor unit and an outdoor unit, wherein the indoor unit is provided with a controller and an evaporator, and the outdoor unit is provided with a compressor. The controller may include Figure 1 A processor 1001 and a memory 1002 are shown.

[0072] Based on the modular hardware structure of the air conditioner described above, various embodiments of the compressor frequency increase control method of the present invention are proposed.

[0073] like Figure 2 As shown, Figure 2 1 is a flow chart of a method for controlling the frequency increase of a compressor according to an embodiment of the present invention. The method for controlling the frequency increase of a compressor according to an embodiment of the present invention includes but is not limited to steps S100, S200, S300, and S400.

[0074] Step S100, obtaining the ambient temperature and determining the target frequency according to the ambient temperature;

[0075] Step S200: When the target frequency is lower than the first frequency of the first frequency-increasing platform, the compressor is controlled to stay at the first frequency-increasing platform and then frequency-increasing to the target frequency;

[0076] Step S300, when the target frequency is greater than the first frequency and less than the second frequency of the second frequency-upgrading platform, controlling the compressor to stay at the first frequency-upgrading platform and then upgrading to the target frequency according to a first preset condition;

[0077] Step S400: When the target frequency is greater than the second frequency, the compressor is controlled to stay at the first frequency-upgrading platform and then upgrade the frequency to the second frequency according to the first preset condition; and the compressor is controlled to stay at the second frequency-upgrading platform and then upgrade the frequency to the target frequency according to the first preset condition;

[0078] in,

[0079] In the cooling mode, the first preset condition is that the compressor discharge temperature is lower than the first discharge temperature or the evaporator coil temperature is higher than the first evaporator coil temperature;

[0080] In the heating condition, the first preset condition is that the exhaust temperature of the compressor is lower than the first exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is lower than the first temperature difference.

[0081] Specifically, when the compressor starts running, the target frequency to be reached by the compressor during this startup is determined based on the ambient temperature. The frequencies corresponding to the various frequency-increasing platforms in the current air conditioner are then searched for, and different frequency-increasing control strategies are then implemented. For example, in an embodiment of the present invention, to reduce the time required for the compressor to complete startup, only two frequency-increasing platforms are provided to reduce the number of frequency-increasing platforms the compressor must pass through. Furthermore, based on the compressor's cooling or heating operating conditions and the relationship between the target frequency and the frequency of the frequency-increasing platform, different preset conditions are used to determine whether the compressor maintains or changes its current frequency. This ensures that the compressor completes the startup process as quickly as possible, provided that it has completed preheating during the frequency-increasing process, thereby avoiding the problem of low cooling or heating efficiency during the initial startup. Among them, the first preset condition is related to the temperature of the air conditioner under the current operating conditions. For example, under the cooling condition, the first preset condition can use the exhaust temperature of the compressor or the evaporator coil temperature as a reference to indicate whether the compressor has been preheated sufficiently. Under the heating condition, the first preset condition can use the exhaust temperature of the compressor or the difference between the outdoor ambient temperature and the condenser coil temperature as a reference, which also indicates whether the compressor has been preheated sufficiently. Under the above preset conditions, if it is determined that the compressor is not preheated enough, it is necessary to further increase the power of the compressor to shorten the time taken for the compressor startup process.

[0082] Since only two frequency-upgrading platforms are provided in the embodiment of the present invention, the relationship between the target frequency and the first frequency and the second frequency is limited to the above-mentioned steps S200, S300, and S400. It can be understood that when there are more than three frequency-upgrading platforms, if the compressor needs to continuously pass through more than three frequency-upgrading platforms during the frequency-upgrading process, reference can be made to step S400. Step S400 involves the frequency-upgrading control process between two adjacent frequency-upgrading platforms. Therefore, the process of continuously passing through more than three frequency-upgrading platforms can be regarded as the frequency-upgrading control process between multiple adjacent frequency-upgrading platforms.

[0083] It is understandable that the above-mentioned ambient temperature includes the outdoor ambient temperature and the indoor ambient temperature. The process of obtaining the ambient temperature in step S100 can be determined according to the working condition of the compressor. Therefore, the target frequency in step S100 can be determined by the following method:

[0084] Under cooling conditions, obtain the outdoor ambient temperature and determine the target frequency based on the outdoor ambient temperature;

[0085] Under the heating condition, the outdoor ambient temperature and the indoor ambient temperature are obtained, and the target frequency is determined according to the outdoor ambient temperature and the indoor ambient temperature.

[0086] The cooling start-up of the compressor needs to consider the impact of the outdoor ambient temperature on the startup process, especially in low-temperature environments. A higher target frequency may be required for the compressor. In this case, the indoor ambient temperature has little impact on the cooling start-up and can be ignored. The heating start-up of the compressor needs to consider both the outdoor and indoor ambient temperatures. Especially in low-temperature environments, the compressor requires a higher target frequency for indoor heating. Both indoor and outdoor ambient temperatures affect the operating efficiency of the compressor, so both indoor and outdoor temperatures should be considered when determining the target frequency.

[0087] Reference Figure 3 The frequency increase control process in step S200 can be implemented by the following steps:

[0088] Step S210, controlling the compressor to operate at a first frequency for a first duration;

[0089] Step S220: Control the compressor to reduce the frequency to the target frequency.

[0090] When the target frequency is lower than the first frequency of the first frequency-upgrading platform, to expedite the compressor preheating process, the compressor is first frequency-upgraded to the first frequency for a first duration, and then frequency-downgraded from the first frequency to the target frequency, thereby shortening the compressor startup time. The first frequency may preferably be 50 Hz, and the first duration may be between 5 seconds and 240 seconds, preferably 60 seconds.

[0091] Reference Figure 4The frequency increase control process in step S300 can be implemented by the following steps:

[0092] Step S310, controlling the compressor to operate at a first frequency for a first duration;

[0093] Step S320: When the first preset condition is met, the compressor is controlled to increase the frequency to the target frequency;

[0094] Step S330: When the first preset condition is not met, the compressor is controlled to maintain the first frequency operation until the second preset condition is met, and the compressor is controlled to increase the frequency to the target frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

[0095] When the target frequency is higher than the first frequency of the first frequency-upgrading platform and lower than the second frequency of the second frequency-upgrading platform, the compressor needs to pass through the first frequency-upgrading platform before reaching the target frequency. Specifically, the compressor is first frequency-upgraded to the first frequency and operated for the first duration, and then it is determined whether the first preset condition is met. If the first preset condition is met, it indicates that the compressor has not yet completed preheating, and it is necessary to continue to increase the operating frequency of the compressor to the target frequency to speed up the preheating process of the compressor; if the first preset condition is not met, the compressor needs to maintain the current frequency operation and continue to judge the second preset condition. If the second preset condition is met at this time, the compressor is frequency-upgraded to the target frequency. If the second preset condition is not met, the compressor continues to maintain the current frequency operation and continues to judge the second preset condition. Among them, the first frequency can be preferably 50Hz, the first duration can be between 5 seconds and 240 seconds, preferably 60 seconds, and the second frequency can be preferably 90Hz.

[0096] The frequency up-conversion control process in step S400 is divided into two processes: one is the process from starting the frequency up-conversion to the second frequency up-conversion platform, and the other is the process from the second frequency up-conversion platform to the target frequency. These two processes are described separately below, but it should be noted that the two processes are actually continuous.

[0097] Reference Figure 5 The process of the compressor frequency increasing from startup to the second frequency increasing platform can be specifically achieved through the following steps:

[0098] Step S410, controlling the compressor to operate at a first frequency for a first duration;

[0099] Step S420: When the first preset condition is met, the compressor is controlled to increase the frequency to the second frequency;

[0100] Step S430: When the first preset condition is not met, the compressor is controlled to maintain the first frequency until the second preset condition is met, and the compressor is controlled to increase the frequency to the second frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

[0101] When the target frequency is higher than the second frequency of the second frequency-upgrading platform, the compressor needs to pass through the first frequency-upgrading platform and the second frequency-upgrading platform once before reaching the target frequency. Specifically, the compressor is first frequency-upgraded to the first frequency and operated for the first duration, and then it is determined whether the first preset condition is met. If the first preset condition is met, it indicates that the compressor has not yet completed preheating, and it is necessary to continue to increase the operating frequency of the compressor to the second frequency to speed up the preheating process of the compressor; if the first preset condition is not met, the compressor needs to maintain the current frequency operation and continue to judge the second preset condition. If the second preset condition is met at this time, the compressor is frequency-upgraded to the second frequency. If the second preset condition is not met, the current frequency operation is continued and the second preset condition is continued to be judged. Among them, the first frequency can be preferably 50Hz, the first duration can be between 5 seconds and 240 seconds, preferably 60 seconds, and the second frequency can be preferably 90Hz.

[0102] Reference Figure 6 The process of the compressor frequency increasing from the second frequency increasing platform to the target frequency can be specifically achieved by the following steps:

[0103] Step S440, controlling the compressor to operate at a second frequency for a second duration;

[0104] Step S450: When the first preset condition is met, the compressor is controlled to increase the frequency to the target frequency;

[0105] Step S460: When the first preset condition is not met, the compressor is controlled to maintain the second frequency operation until the second preset condition is met, and the compressor is controlled to increase the frequency to the target frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

[0106] When the compressor reaches the second frequency-upgrade platform through steps S410 to S430, the compressor is maintained at the second frequency for a second duration, and then a determination is made as to whether a first preset condition is satisfied. If the first preset condition is satisfied, the compressor is increased to the target frequency. If the first preset condition is not satisfied, the compressor is maintained at the second frequency and the second preset condition is continuously determined. If the second preset condition is satisfied, the compressor is increased to the target frequency. If the second preset condition is not satisfied, the compressor is maintained at the current frequency and the second preset condition is continuously determined. The second frequency may preferably be 90 Hz, and the second duration may be between 5 seconds and 240 seconds, preferably 90 seconds.

[0107] The second preset condition is determined according to different cooling and heating working conditions, specifically:

[0108] In the cooling mode, the second preset condition is that the exhaust temperature of the compressor is lower than the second exhaust temperature and the evaporator coil temperature is higher than the second evaporator coil temperature.

[0109] In the heating condition, the second preset condition is that the exhaust temperature of the compressor is lower than the second exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is lower than the second temperature difference.

[0110] Combining the first preset condition and the second preset condition, it can be seen that the first exhaust temperature is greater than the second exhaust temperature, the first evaporator coil temperature is less than the second evaporator coil temperature, and the first temperature difference is greater than the second temperature difference.

[0111] Specifically, the temperature values ​​in the first preset condition and the second preset condition can preferably be in the following ranges and values: the first exhaust temperature can be between 60-120 degrees Celsius, preferably 90 degrees Celsius, the second exhaust temperature can be between 60-120 degrees Celsius, preferably 80 degrees Celsius, the first evaporator coil temperature can be between 0-5 degrees Celsius, preferably 4 degrees Celsius, the second evaporator coil temperature can be between 5-8 degrees Celsius, preferably 6 degrees Celsius, the first temperature difference is preferably 10 degrees Celsius, and the second temperature difference is preferably 5 degrees Celsius.

[0112] In addition, it is understood that the above-mentioned compressor exhaust temperature parameters, outdoor ambient temperature parameters, and outdoor condenser coil temperature parameters can be detected and obtained in real time by temperature sensors in embodiments of the present invention. For example, embodiments of the present invention can set a temperature sensor at the exhaust position of the compressor to obtain the compressor exhaust temperature parameter, or set a temperature sensor outdoors to obtain the outdoor ambient temperature parameter, or set a temperature sensor at the outdoor condenser coil position to obtain the outdoor condenser coil temperature parameter.

[0113] By controlling the startup and frequency increase process of the compressor through the above steps, the time taken for the compressor to rise from startup to the target frequency can be greatly shortened, solving the problem of the long startup time of the compressor, improving the cooling or heating effect of the variable frequency air conditioner at startup, and enhancing the user experience.

[0114] The frequency up-conversion control method of the present invention is described below through three practical examples.

[0115] Example 1: Start the machine in cooling mode. Figure 7 In the air conditioner, two frequency-increasing platforms for the compressor are provided from low to high, which are represented by a first frequency-increasing platform and a second frequency-increasing platform. The first frequency-increasing platform corresponds to a first frequency F1 (50 Hz), and the second frequency-increasing platform corresponds to a second frequency F2 (90 Hz). In Example 1, the frequency-increasing control method for the compressor includes:

[0116] Detect outdoor ambient temperature T4;

[0117] Determine the maximum frequency Fmax allowed for the compressor to operate based on T4;

[0118] When Fmax is less than F1, the compressor first runs to the first frequency-increasing platform with a frequency of F1, maintains the frequency for t1 (60 seconds), and then reduces the frequency to Fmax;

[0119] When F1≤Fmax<F2, the compressor first runs to the first frequency-up platform with a frequency of F1 and a holding time of t1. Then, it is determined whether the compressor exhaust temperature Tp≥Tps1 (90 degrees Celsius) or the evaporator coil temperature T2≤T2s1 (4 degrees Celsius) is satisfied. If not, the compressor is controlled to increase the frequency to Fmax. If satisfied, the compressor is controlled to maintain the current frequency. It is also determined whether Tp<Tps2 (80 degrees Celsius) and T2>T2s2 (6 degrees Celsius) are satisfied. If so, the compressor is controlled to increase the frequency to Fmax.

[0120] When F2≤Fmax, the compressor first runs to the first frequency-upgrading platform with a frequency of F1 and a holding time of t1. Then, it is determined whether Tp≥Tps1 or T2≤T2s1 is satisfied. If not, the compressor is controlled to increase the frequency to the second frequency-upgrading platform. If so, the compressor is controlled to maintain the current frequency. It is also determined whether Tp<Tps2 and T2>T2s2 are satisfied. If so, the compressor is controlled to increase the frequency to the second frequency-upgrading platform.

[0121] The compressor is frequency-upgraded to the second frequency-upgrade platform with a frequency of F2 and maintained for t2 (90 seconds). Then, it is determined whether Tp≥Tps1 or T2≤T2s1 is satisfied. If not, the compressor is controlled to frequency-upgrade to Fmax. If satisfied, the compressor is controlled to maintain the current frequency. It is also determined whether Tp<Tps2 and T2>T2s2 are satisfied. If satisfied, the compressor is controlled to frequency-upgrade to Fmax.

[0122] Example 2: Turn on the heating mode, refer to Figure 8 In the air conditioner, two frequency-increasing platforms for the compressor are provided from low to high, which are represented by a first frequency-increasing platform and a second frequency-increasing platform. The first frequency-increasing platform corresponds to a first frequency F1 (50 Hz), and the second frequency-increasing platform corresponds to a second frequency F2 (90 Hz). In Example 1, the frequency-increasing control method for the compressor includes:

[0123] Detecting indoor ambient temperature T1 and outdoor ambient temperature T4;

[0124] Determine the maximum frequency Fmax allowed for the compressor to operate based on T1 and T4;

[0125] When Fmax is less than F1, the compressor first runs to the first frequency-increasing platform with a frequency of F1, maintains the frequency for t1 (60 seconds), and then reduces the frequency to Fmax;

[0126] When F1≤Fmax<F2, the compressor first runs to the first frequency-up platform with a frequency of F1 and a holding time of t1. Then, it is determined whether the exhaust temperature of the compressor Tp≥Tps1 (90 degrees Celsius) is satisfied. If not, the compressor is controlled to increase the frequency to Fmax. If so, the compressor is controlled to maintain the current frequency. It is also determined whether Tp<Tps2 (80 degrees Celsius) is satisfied. If so, the compressor is controlled to increase the frequency to Fmax.

[0127] When F2≤Fmax, the compressor first runs to the first frequency-upgrading platform with a frequency of F1 and a holding time of t1. Then, it is determined whether Tp≥Tps1 is satisfied. If not, the compressor is controlled to increase the frequency to the second frequency-upgrading platform. If so, the compressor is controlled to maintain the current frequency and whether Tp<Tps2 is satisfied. If so, the compressor is controlled to increase the frequency to the second frequency-upgrading platform.

[0128] The compressor is frequency-upgraded to the second frequency-upgrade platform with a frequency of F2 and maintained for t2 (90 seconds). Then, it is determined whether Tp≥Tps1 is satisfied. If not, the compressor is controlled to frequency-upgrade to Fmax. If satisfied, the compressor is controlled to maintain the current frequency. It is also determined whether Tp<Tps2 is satisfied. If satisfied, the compressor is controlled to frequency-upgrade to Fmax.

[0129] Example 3: Start the machine in heating mode. Figure 9 In the air conditioner, two frequency-increasing platforms for the compressor are provided from low to high, which are represented by a first frequency-increasing platform and a second frequency-increasing platform. The first frequency-increasing platform corresponds to a first frequency F1 (50 Hz), and the second frequency-increasing platform corresponds to a second frequency F2 (90 Hz). In Example 1, the frequency-increasing control method for the compressor includes:

[0130] Detecting indoor ambient temperature T1 and outdoor ambient temperature T4;

[0131] Determine the maximum frequency Fmax allowed for the compressor to operate based on T1 and T4;

[0132] When Fmax is less than F1, the compressor first runs to the first frequency-increasing platform with a frequency of F1, maintains the frequency for t1 (60 seconds), and then reduces the frequency to Fmax;

[0133] When F1≤Fmax<F2, the compressor first runs to the first frequency increase platform, with a frequency of F1, and maintains it for a time of t1. It also monitors T4 and the condenser coil temperature T3 in real time, and then determines whether T4-T3≥△T1 (10 degrees Celsius). If not, the compressor is controlled to increase the frequency to Fmax. If so, the compressor is controlled to maintain the current frequency, and determines whether T4-T3<△T2 (5 degrees Celsius). If so, the compressor is controlled to increase the frequency to Fmax.

[0134] When F2≤Fmax, the compressor first runs to the first frequency-upgrading platform with a frequency of F1 and a holding time of t1, and monitors the values ​​of T4 and T3 in real time, and then determines whether T4-T3≥△T1. If not, the compressor is controlled to increase the frequency to the second frequency-upgrading platform. If so, the compressor is controlled to maintain the current frequency, and determines whether T4-T3<△T2. If so, the compressor is controlled to increase the frequency to the second frequency-upgrading platform.

[0135] The compressor is frequency-upgraded to the second frequency-upgrade platform with a frequency of F2 and maintained for t2 (90 seconds). Then, it is determined whether T4-T3≥△T1 is satisfied. If not, the compressor is controlled to frequency-upgrade to Fmax. If satisfied, the compressor is controlled to maintain the current frequency. It is also determined whether T4-T3<△T2 is satisfied. If satisfied, the compressor is controlled to frequency-upgrade to Fmax.

[0136] Based on the above-mentioned compressor frequency increase control method, various embodiments of a controller, an air conditioner, and a computer-readable storage medium of the present invention are respectively proposed below.

[0137] One embodiment of the present invention provides a controller, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor.

[0138] The processor and the memory may be connected via a bus or other means.

[0139] It should be noted that the controller in this embodiment may include: Figure 1 The processor and memory in the illustrated embodiment both belong to the same inventive concept, and therefore both have the same implementation principles and beneficial effects, which will not be described in detail here.

[0140] The non-transient software program and instructions required to implement the compressor frequency increase control method of the above embodiment are stored in the memory, and when executed by the processor, the compressor frequency increase control method of the above embodiment is performed.

[0141] In addition, an embodiment of the present invention further provides an air conditioner, which includes the above-mentioned controller.

[0142] It is worth noting that since the air conditioner of the embodiment of the present invention has the controller of the above embodiment, and the controller of the above embodiment can execute the frequency increase control method of the compressor of the above embodiment, the specific implementation manner and technical effects of the air conditioner of the embodiment of the present invention can refer to the specific implementation manner and technical effects of the frequency increase control method of the compressor of any of the above embodiments.

[0143] The embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned compressor frequency increase control method, for example, Figure 1 The execution of one of the processors 1001 in the embodiment of the present invention may cause the one or more processors to execute the frequency increase control method in the embodiment of the present invention, for example, executing the above-described Figure 2 Steps S100 to S400 of the method, Figure 3 Steps S210 to S220 of the method, Figure 4 Steps S310 to S330 of the method, Figure 5 Steps S410 to S430 of the method, Figure 6 Method steps S440 to S460.

[0144] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network nodes. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0145] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include a computer-readable storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer-readable storage medium is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0146] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for controlling frequency increase of a compressor, comprising: Acquiring an ambient temperature and determining a target frequency according to the ambient temperature; When the target frequency is lower than the first frequency of the first frequency-increasing platform, controlling the compressor to stay at the first frequency-increasing platform and then reduce the frequency to the target frequency; When the target frequency is greater than the first frequency and less than the second frequency of the second frequency-upgrading platform, controlling the compressor to reside on the first frequency-upgrading platform and then upgrading the frequency to the target frequency according to a first preset condition; When the target frequency is greater than the second frequency, controlling the compressor to stay at the first frequency-upgrading platform and then upgrading to the second frequency according to the first preset condition, and controlling the compressor to stay at the second frequency-upgrading platform and then upgrading to the target frequency according to the first preset condition; in, In the cooling mode, the first preset condition is that the exhaust temperature of the compressor is lower than the first exhaust temperature or the evaporator coil temperature is higher than the first evaporator coil temperature; In the heating condition, the first preset condition is that the exhaust temperature of the compressor is less than the first exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is less than the first temperature difference; The step of controlling the compressor to reside on the first frequency-upgrading platform and then upgrading the frequency to the target frequency according to a first preset condition includes: controlling the compressor to operate at the first frequency for a first period of time; When a first preset condition is met, controlling the compressor to increase the frequency to the target frequency; When the first preset condition is not met, the compressor is controlled to maintain the first frequency operation until a second preset condition is met, and the compressor is controlled to increase the frequency to the target frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

2. The frequency increase control method according to claim 1, wherein: The obtaining of the ambient temperature and determining the target frequency according to the ambient temperature includes: Under cooling conditions, obtaining an outdoor ambient temperature and determining a target frequency according to the outdoor ambient temperature; Under the heating condition, the outdoor ambient temperature and the indoor ambient temperature are obtained, and the target frequency is determined according to the outdoor ambient temperature and the indoor ambient temperature.

3. The frequency increase control method according to claim 1, wherein: The controlling the compressor to reside on the first frequency-increasing platform and then frequency-down to the target frequency includes: controlling the compressor to operate at the first frequency for a first period of time; The compressor is controlled to reduce the frequency to the target frequency.

4. The frequency increase control method according to claim 1, wherein: The step of controlling the compressor to reside on the first frequency-upgrading platform and then upgrading the frequency to the second frequency according to the first preset condition comprises: controlling the compressor to operate at the first frequency for a first period of time; When the first preset condition is met, controlling the compressor to increase the frequency to the second frequency; When the first preset condition is not met, the compressor is controlled to maintain the first frequency operation until a second preset condition is met, and the compressor is controlled to increase the frequency to the second frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

5. The frequency increase control method according to claim 4, wherein: The step of controlling the compressor to reside on the second frequency-upgrading platform and then frequency-upgrading to the target frequency according to the first preset condition comprises: controlling the compressor to operate at the second frequency for a second period of time; When the first preset condition is met, controlling the compressor to increase the frequency to the target frequency; When the first preset condition is not met, the compressor is controlled to maintain the second frequency operation until a second preset condition is met, and the compressor is controlled to increase the frequency to the target frequency. The second preset condition is related to the temperature of the air conditioner under the current working condition.

6. The frequency increase control method according to claim 1, 4 or 5, characterized in that: The second preset condition is determined according to the following method: In the cooling condition, the second preset condition is that the exhaust temperature of the compressor is lower than the second exhaust temperature and the evaporator coil temperature is higher than the second evaporator coil temperature. In the heating condition, the second preset condition is that the exhaust temperature of the compressor is lower than the second exhaust temperature or the difference between the outdoor ambient temperature and the condenser coil temperature is lower than the second temperature difference.

7. The frequency increase control method according to claim 6, wherein: The first exhaust gas temperature is greater than the second exhaust gas temperature, the first evaporator coil temperature is less than the second evaporator coil temperature, and the first temperature difference is greater than the second temperature difference.

8. A controller, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 7 when executing the computer program.

9. An air conditioner, characterized in that: Comprising a compressor and a controller as claimed in claim 8.

10. A computer-readable storage medium, characterized in that Computer-executable instructions are stored, and the computer-executable instructions are used to execute the method according to any one of claims 1 to 7.

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