Air conditioner and frequency control method of compressor of air conditioner

Abstract

The invention provides an air conditioner and a frequency control method of a compressor of the air conditioner. The frequency control method of the compressor comprises the steps that operation parameters of a variable frequency driver are obtained; whether the compressor is in a power supply missing state or not is judged according to the operation parameters; if yes, the temperature parameter of the rectifying unit is obtained, and the operation frequency of the compressor is adjusted according to the temperature parameter. According to the frequency control method of the compressor, the problems that the temperature of the bus capacitor of the variable frequency driver is too high and even the air conditioner stops and cannot operate under the condition that the power supply is unstable such as three-phase power imbalance or lacking of the power supply can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an air conditioner and a frequency control method for its compressor. Background Art

[0002] A variable-frequency air conditioner is a commonly used air conditioner, which can adjust the operating frequency of the compressor according to the indoor conditions to automatically provide the cooling or heating capacity required by the user, making the indoor environment more comfortable. In the related art, in the case of unstable power supply such as three-phase power imbalance or power failure in the power supply, the temperature of the electrolytic capacitor of the variable-frequency drive will be too high or even the unit will stop running, which not only affects the user experience but also easily causes damage to the bus capacitor. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide an air conditioner and a frequency control method for its compressor that can overcome or at least partially solve the above problems, and can solve the problem that the temperature of the bus capacitor of the variable-frequency drive is too high or even the air conditioner stops running in the case of unstable power supply such as three-phase power imbalance or power failure.

[0004] Specifically, the present invention provides a frequency control method for an air conditioner compressor.

[0005] The frequency control method for the air conditioner compressor of the present invention, the air conditioner includes a variable-frequency drive and a compressor, the variable-frequency drive has a rectifying unit for converting alternating current into direct current, and is characterized in that the frequency control method includes: obtaining the operating parameters of the variable-frequency drive; judging whether the compressor is in a power supply missing state according to the operating parameters; if so, obtaining the temperature parameter of the rectifying unit, and adjusting the operating frequency of the compressor according to the temperature parameter.

[0006] In some embodiments, the adjusting the operating frequency of the compressor according to the temperature parameter includes: judging whether the temperature parameter is greater than a preset temperature value; if so, reducing the operating frequency of the compressor.

[0007] In some embodiments, it includes: in the case of determining that the variable-frequency drive is in a power supply missing state, the obtaining the temperature parameter of the rectifying unit and adjusting the operating frequency of the compressor according to the temperature parameter are performed every first preset time period.

[0008] In some embodiments, the reducing the operating frequency of the compressor includes:

[0009] Determining a frequency reduction value according to the operating parameters;

[0010] Reduce the operating frequency of the compressor by the frequency reduction value.

[0011] In some embodiments, determining the frequency reduction value according to the operating parameter includes:

[0012] When the operating parameter is less than or equal to the first preset parameter value and greater than the second preset parameter value, make the frequency reduction value be the first preset frequency value;

[0013] When the operating parameter is less than or equal to the second preset parameter value, then make the compressor reduce the second preset frequency value;

[0014] Wherein, the first preset parameter value is greater than the second preset parameter value, and the first preset frequency value is less than the second preset frequency value.

[0015] In some embodiments, determining whether the variable frequency drive is in a power supply missing state according to the operating parameter includes:

[0016] Judge whether the operating parameter is less than the first preset parameter value;

[0017] If so, the variable frequency drive is in a power supply missing state.

[0018] In some embodiments, the operating parameter is the bus ripple voltage frequency of the variable frequency drive.

[0019] In some embodiments, the frequency control method of the air conditioner compressor further includes:

[0020] In response to determining that the variable frequency drive is in a power supply missing state, adjust the frequency limit of the compressor according to the operating parameter, and when the operating frequency of the compressor is greater than the frequency limit, make the operating frequency of the compressor drop to the frequency limit;

[0021] Wherein, when the operating parameter is less than or equal to the first preset parameter value and greater than the second preset parameter value, make the frequency limit of the compressor be the first preset frequency limit;

[0022] When the operating parameter is less than or equal to the second preset parameter value, make the frequency limit of the compressor be the second preset frequency limit;

[0023] Wherein, the first preset parameter value is greater than the second preset parameter value, and the first preset frequency limit is greater than the second preset frequency limit.

[0024] In some embodiments, in response to the compressor being in a power supply missing state, the warning module of the air conditioner emits a warning signal.

[0025] The frequency control method of the air conditioner compressor according to the embodiments of the present invention adjusts the operating frequency of the air conditioner compressor according to the temperature parameter of the rectification unit, so as to avoid the rectification module working in a state of too high temperature for a long time when the power supply is unstable, that is, when the three-phase power supply is unstable or lacks a phase, enabling the compressor to operate more stably, improving the user experience, and at the same time extending the service life of the rectification module. Moreover, the frequency control method of the air conditioner compressor according to the embodiments of the present invention first determines that the compressor is operating under unstable power supply according to the operating parameters of the variable frequency drive, and then adjusts the operating frequency of the compressor according to the temperature parameter of the rectification unit, thereby excluding the situation where the rectification module intermittently or briefly has a higher temperature caused by other factors except for unstable power supply, and thus being able to reduce the number of times of adjusting the operating frequency of the compressor, and further improving the stability of the compressor operation.

[0026] The air conditioner of the present invention includes a controller, the controller includes a memory, a processor, and a machine-executable program stored on the memory and running on the processor, and when the processor executes the machine-executable program, the control method as described in any one of the above is implemented.

[0027] Based on the following detailed description of the specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will become more clear about the above and other objects, advantages, and features of the present invention. Description of the Drawings

[0028] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0029] Figure 1 is a schematic flowchart of the frequency control method of the compressor according to the embodiments of the present invention;

[0030] Figure 2 is a schematic flowchart of the frequency control method of the compressor according to the embodiments of the present invention;

[0031] Figure 3 is a schematic flowchart of the frequency control method of the compressor according to the embodiments of the present invention;

[0032] Figure 4 is a schematic flowchart of the frequency control method of the compressor according to the embodiments of the present invention;

[0033] Figure 5 is a schematic flowchart of the frequency control method of the compressor according to the embodiments of the present invention;

[0034] Figure 6It is a schematic flowchart of a frequency control method for a compressor according to an embodiment of the present invention;

[0035] Figure 7 It is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] Air conditioner 100; Compressor 110; Variable frequency driver 120; Acquisition unit 121; Temperature sensor 122; Rectification unit 123. Detailed implementation manners

[0038] Next, refer to Figures 1 to 7 to describe the frequency control method of the air conditioner and its compressor according to the embodiments of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0039] Unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0040] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. That is, in the description of this embodiment, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath", or "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0041] In the description of this embodiment, the descriptions with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] The air conditioner 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0043] As Figure 7 shown, the air conditioner 100 according to an embodiment of the present invention includes a compressor 110 and a variable frequency driver 120. The variable frequency driver 120 is connected to the compressor 110 so that the variable frequency driver 120 controls the operating frequency of the compressor 110. The variable frequency driver 120 has a rectification unit 123 for converting alternating current into direct current.

[0044] In some embodiments, the rectification unit 123 is an electrolytic capacitor.

[0045] The frequency control method of the compressor 110 of the air conditioner 100 according to an embodiment of the present invention can solve the problems that when the power supply is unstable such as three-phase power imbalance or power failure, the temperature of the bus capacitor of the variable frequency driver 120 is too high or even the air conditioner 100 stops running.

[0046] The frequency control method of the compressor 110 of the air conditioner 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0047] As Figure 1 shown and with reference to Figure 7 , the frequency control method of the compressor 110 of the air conditioner 100 according to an embodiment of the present invention includes the following steps:

[0048] S100. Obtain the operating parameters of the variable frequency driver 120. Among them, a collection unit 121 is provided on the variable frequency driver 120, and the operating parameters of the variable frequency driver 120 are collected through the collection unit 121.

[0049] S200. Determine whether the compressor 110 is in a power supply missing state according to the operating parameters. Among them, the power supply missing state refers to the operating state of the compressor 110 when the power supply has three-phase power imbalance or three-phase power failure.

[0050] S300. If so, obtain the temperature parameter of the rectification unit 123 and adjust the operating frequency of the compressor 110 according to the temperature parameter. That is to say, if it is determined that the compressor 110 is in a power supply loss state, first detect the temperature parameter of the rectification unit 123, and then adjust the operating frequency of the compressor 110 according to the temperature parameter. Among them, a temperature sensor 122 is provided on the variable frequency drive 120, so that the temperature of the rectification unit 123 can be monitored in real time through the temperature sensor 122 to obtain the temperature parameter of the rectification unit 123.

[0051] Compared with the related art, the frequency control method of the compressor 110 of the air conditioner 100 according to the embodiment of the present invention adjusts the operating frequency of the compressor 110 of the air conditioner 100 according to the temperature parameter of the rectification unit 123. Thus, when the power supply is unstable, that is, when the three-phase power supply is unstable or there is a missing phase, it is possible to prevent the rectification module from working at a too high temperature for a long time, make the compressor 110 operate more stably, improve the user experience, and at the same time extend the service life of the rectification module. Moreover, the frequency control method of the compressor 110 of the air conditioner 100 according to the embodiment of the present invention first determines that the compressor 110 operates under the condition of unstable power supply according to the operating parameters of the variable frequency drive 120, and then adjusts the operating frequency of the compressor 110 according to the temperature parameter of the rectification unit 123. Thereby, other factors other than unstable power supply that cause the rectification module to intermittently or briefly have a higher temperature are excluded, so that the number of adjustments to the operating frequency of the compressor 110 can be reduced, and thus the stability of the operation of the compressor 110 is further improved.

[0052] In some embodiments, as Figure 2 shown, determining whether the variable frequency drive 120 is in a power supply loss state according to the operating parameters in step S2 includes the following steps:

[0053] S210. Determine whether the operating parameter is less than the first preset parameter value.

[0054] S220. If so, the variable frequency drive 120 is in a power supply loss state.

[0055] That is to say, first determine whether the operating parameter of the variable frequency drive 120 is within the normal parameter range. That is, when the operating parameter of the variable frequency drive 120 is greater than or equal to the first preset parameter value, the compressor 110 is in a normal operating state with stable power supply. If the operating parameter of the variable frequency drive 120 is less than the first preset parameter value, it is determined that the compressor 110 is in a power supply loss state. Thus, by comparing the operating parameter of the variable frequency drive 120 with the first preset parameter value, it is determined whether the compressor 110 is in a power supply loss state, making the determination of the operating state of the compressor 110 more accurate.

[0056] Preferably, the operating parameter is the bus ripple voltage frequency of the variable-frequency drive 120, and the first preset parameter value is the preset bus ripple voltage frequency value. That is to say, it is determined whether the drive is in a power supply loss state according to the bus ripple voltage frequency.

[0057] For example, the first preset parameter value is 250 Hz. When it is detected that the bus ripple voltage frequency of the variable-frequency drive 120 is greater than or equal to 250 Hz, it is determined that the compressor 110 is in a normal operating state; when it is detected that the bus ripple voltage frequency of the variable-frequency drive 120 is less than 250 Hz, it is determined that the compressor 110 is in a power supply loss state.

[0058] It should be noted that the first preset parameter value needs to be determined according to the specific specifications and models of the air conditioner 100, and the specific numerical value of the first preset parameter value is not limited herein.

[0059] Specifically, the variable-frequency drive 120 is connected to an acquisition unit 121 capable of detecting its bus ripple voltage frequency, so as to collect the bus ripple voltage frequency information of the variable-frequency drive 120.

[0060] In some embodiments, as Figure 3 shown, adjusting the operating frequency of the compressor 110 according to the temperature parameter in step S300 includes:

[0061] S310. Determine whether the temperature parameter is greater than the preset temperature value.

[0062] S320. If so, reduce the operating frequency of the compressor 110.

[0063] That is to say, by comparing the temperature parameter of the rectifying unit 123 with the preset temperature value, when the temperature parameter is greater than the preset temperature value, the operation of reducing the operating frequency of the compressor 110 of the air conditioner 100 is performed. When the temperature parameter is less than or equal to the preset temperature value, no additional adjustment is made to the operating frequency of the compressor 110 of the air conditioner 100.

[0064] In the case of unstable power supply and too high temperature of the rectifying unit 123, the operating frequency of the compressor 110 is reduced so that the temperature of the rectifying unit 123 can be reduced, and the rectifying module is prevented from working at too high a temperature for a long time. And the compressor 110 operates at a lower operating frequency, so that the compressor 110 can still operate relatively smoothly in a state where the rectifying unit 123 is not easily damaged, improving the user experience.

[0065] When the power supply is unstable and the temperature of the rectifying unit 123 has not reached an overheat condition, the compressor 110 of the air conditioner 100 operates at a normal operating frequency, thus largely meeting the user's usage requirements and enhancing the user experience.

[0066] It should be noted that the temperature preset value needs to be determined according to the specific specifications, models of the air conditioner 100, and the specific operating conditions of the air conditioner 100. The specific numerical value of the first preset parameter value is not limited herein.

[0067] The temperature sensor 122 for detecting the temperature of the rectifying unit 123 can be set at a position in the air conditioner 100 where the temperature change of the rectifying unit 123 can be received. Among them, the temperature sensor 122 for detecting the temperature of the rectifying unit 123 can be directly set on the rectifying unit 123. For example, the temperature sensor 122 is directly set on the electrolytic capacitor of the variable frequency driver 120; or, the temperature sensor 122 can be set on a part of the housing of the variable frequency driver 120 affected by the temperature of the rectifying unit 123.

[0068] In some embodiments, as Figure 4 shown, reducing the operating frequency of the compressor 110 in step S320 includes:

[0069] S321. Determine the frequency reduction value according to the operating parameters.

[0070] S322. Reduce the operating frequency of the compressor 110 by the frequency reduction value.

[0071] That is to say, the operating parameters of the variable frequency driver 120 are different when the compressor 110 is in a power supply failure state, and the frequency reduction values that the compressor 110 needs to lower when the rectifying unit 123 exceeds the preset temperature value are also different. The operating parameters of the variable frequency driver can reflect the degree of instability of the power supply for the compressor 110, so as to more accurately determine the frequency reduction value of the compressor 110 according to the operating parameters of the driver. Thus, when the temperature of the rectifying unit 123 exceeds the preset temperature value, by making the compressor 110 lower the frequency reduction value that more conforms to the current power supply state, it is ensured that the rectifying unit 123 can be cooled more promptly, and the service life of the rectifying unit 123 is further extended.

[0072] Specifically, when the operating parameters are less than or equal to the first preset parameter value and greater than the second preset parameter value, the frequency reduction value is the first preset frequency value; when the operating parameters are less than or equal to the second preset parameter value, the compressor is made to lower the second preset frequency value; wherein, the first preset parameter value is greater than the second preset parameter value, and the first preset frequency value is less than the second preset frequency value.

[0073] For example, the operating parameter is the bus ripple voltage frequency, the first preset parameter value is 250 Hz, the second preset parameter value is 150 Hz, the first preset frequency value is 15 Hz, and the second preset frequency value is 10 Hz. When the operating parameter is less than or equal to 250 Hz and greater than 150 Hz, the operating frequency of the compressor 110 is reduced by 10 Hz; when the operating parameter is less than or equal to 150 Hz, the operating frequency of the compressor 110 is reduced by 15 Hz.

[0074] It should be noted that the first preset frequency value, the second preset frequency value, and the second preset parameter value need to be determined according to the specific specifications and models of the air conditioner 100, and the specific numerical value of the first preset parameter value is not limited herein.

[0075] In some embodiments, the frequency control method for the compressor 110 of the air conditioner 100 according to the embodiment of the present invention further includes the following steps:

[0076] In the case of determining that the variable frequency drive 120 is in a power supply loss state, the temperature parameter of the rectifying unit 123 is acquired every first preset time period, and the operating frequency of the compressor 110 is adjusted according to the temperature parameter.

[0077] That is to say, in the case of determining that the variable frequency drive 120 is in a power supply loss state, the temperature of the rectifying unit 123 is detected every certain time. If the temperature value of the rectifying unit 123 is greater than the preset temperature value, an operation of reducing the operating frequency of the compressor 110 of the air conditioner 100 is performed. If the temperature value of the rectifying unit 123 is less than or equal to the preset temperature value, no additional adjustment is made to the operating frequency of the compressor 110 of the air conditioner 100. In the case of determining that the variable frequency drive 120 is not in a power supply loss state, the temperature of the rectifying unit 123 is no longer detected. Thus, in the case of the variable frequency drive 120 being in a power supply loss state, it is ensured that the rectifying unit 123 does not operate at a too high temperature for a long time, thereby extending the service life of the rectifying unit 123.

[0078] For example, the temperature of the rectifying unit 123 is detected once every 15 minutes, and it is determined whether the temperature value of the rectifying unit 123 exceeds the preset temperature value. If the temperature value exceeds the preset temperature value, an operation of reducing the frequency is performed on the compressor 110 once.

[0079] In some embodiments, as Figure 5 shown, the frequency control method for the compressor 110 of the air conditioner 100 according to the embodiment of the present invention further includes the following steps:

[0080] S301. In response to determining that the variable frequency drive 120 is in a power supply loss state, adjust the frequency limit of the compressor 110 according to the operating parameter,

[0081] S302. When the operating frequency of the compressor 110 is greater than the frequency limit value, reduce the operating frequency of the compressor 110 to the frequency limit.

[0082] Wherein, when the operating parameter is less than or equal to the first preset parameter value and greater than the second preset parameter value, the frequency limit of the compressor is the first preset frequency limit value; when the operating parameter is less than or equal to the second preset parameter value, the frequency limit of the compressor is the second preset frequency limit value; wherein, the first preset parameter value is greater than the second preset parameter value, and the first preset frequency limit value is greater than the second preset frequency limit value.

[0083] For example, when the compressor 110 is in a normal working state, the frequency limit of the compressor 110 is a. When the operating parameter is less than or equal to the first preset parameter value and greater than the second preset parameter value, the second preset frequency limit value is 70%a; when the operating parameter is less than or equal to the second preset parameter value, the second preset frequency limit value is 50%a.

[0084] When the compressor 110 is in a power supply loss state, the compressor 110 needs to adjust the upper limit value of its operating frequency, that is, the frequency limit, so that the compressor 110 can continue to operate. And when the operating parameters detected by the variable frequency drive 120 are different in the power supply loss state, the corresponding lower frequency limit values of the compressor 110 are also different. The operating parameters of the variable frequency drive 120 can reflect the instability degree of the power supply for the compressor 110. Thus, the frequency limit of the compressor 110 can be determined more accurately according to the operating parameters of the drive. By making the compressor 110 operate within a frequency limit that more conforms to the current power supply state, not only can the compressor 110 operate relatively smoothly and continuously, but also the rectifier unit 123 can be prevented from operating in an overheated state for a long time, thereby extending its service life.

[0085] In some embodiments, as Figure 6 shown, the frequency control method of the compressor 110 of the air conditioner 100 according to the embodiment of the present invention further includes the following steps:

[0086] S303. In response to the compressor 110 being in a power supply loss state, the warning module of the air conditioner 100 issues a warning signal.

[0087] Wherein, the air conditioner 100 can be configured with a sound - generating module, and the sound - generating module constitutes the warning module. When it is determined that the compressor 110 is in a power supply loss state, the sound - generating module emits an alarm sound to the outside; or, the air conditioner 100 can be configured with a display panel. When it is determined that the compressor 110 is in a power supply loss state, the display panel displays a prompt message. Thus, when it is detected that the compressor 110 of the air conditioner 100 is in a power supply loss state, a warning signal is sent to the user through the warning module, so that the user can adjust the power supply or the air conditioner 100 in time.

[0088] The specific implementation process of the frequency control method of the compressor 110 of the air conditioner 100 according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0089] Obtain the bus ripple voltage frequency parameter of the variable frequency drive 120, and determine whether the bus ripple voltage frequency parameter is less than the first preset parameter value. If so, it is determined that the variable frequency drive 120 is in a power supply loss state. In response to the compressor 110 being in a power supply loss state, the warning module of the air conditioner 100 issues a warning signal. When the bus ripple voltage frequency parameter is less than or equal to the first preset parameter value, the frequency is limited to the first preset frequency limit value. When the bus ripple voltage frequency parameter is greater than or equal to the second preset parameter value, the frequency of the compressor 110 is limited to the second preset frequency limit value.

[0090] Determine whether the temperature parameter of the rectification unit 123 is greater than the preset temperature value. If so, reduce the operating frequency of the compressor 110. Among them, when the bus ripple voltage frequency parameter is less than or equal to the first preset parameter value, the frequency reduction value is the first preset frequency value; when the bus ripple voltage frequency parameter is greater than or equal to the second preset parameter value, the compressor 110 is reduced by the second preset frequency value.

[0091] The air conditioner 100 according to the embodiments of the present invention includes a controller. The controller includes a memory, a processor, and a machine-executable program stored on the memory and running on the processor. When the processor executes the machine-executable program, the control method according to any of the above embodiments is implemented.

[0092] The embodiments of the present invention also provide a machine-readable storage medium, on which a machine-executable program is stored. When the machine-executable program is executed by a processor, the control method of the air-conditioning unit according to any of the above embodiments is implemented.

[0093] It should be noted that the logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any machine-readable storage medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in combination with these instruction execution systems, apparatus, or devices.

[0094] For the purposes of the description of this embodiment, a machine-readable storage medium can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the machine-readable storage medium include the following: an electrical connection (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the machine-readable storage medium can even be paper or other suitable medium on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or otherwise processing as appropriate, and then stored in a memory.

[0095] The controller can include a processor adapted to execute stored instructions and a memory that provides temporary storage space for the operation of the instructions during operation. The processor can be a single-core processor, a multi-core processor, a computing cluster, or any number of other configurations. The memory can include random access memory (RAM), read-only memory, flash memory, or any other suitable storage system.

[0096] The processor can be connected via a system interconnect (such as PCI, PCI-Express, etc.) to an I / O interface (input / output interface) adapted to connect the air conditioner 100 to one or more I / O devices (input / output devices). The I / O devices can include, for example, a keyboard and a pointing device, where the pointing device can include a touchpad or a touch screen, etc.

[0097] The processor can also be linked via a system interconnect to a display interface adapted to connect the controller to a display device. The display device can include a display screen as a built-in component of the controller. The display device can also include a computer monitor, a television, a projector, etc. externally connected to the air conditioning unit. Additionally, a network interface controller (NIC) can be adapted to connect the controller to a network via a system interconnect. In some embodiments, the NIC can use any suitable interface or protocol (such as Internet Small Computer System Interface, etc.) to transmit data. The network can be a cellular network, a radio network, a wide area network (WAN), a local area network (LAN), or the Internet, etc. A remote device can be connected to the controller 130 via the network.

[0098] At this point, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the disclosed content of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A frequency control method for an air conditioner compressor, the air conditioner comprising a variable frequency drive and a compressor, the variable frequency drive having a rectification unit for converting alternating current into direct current, characterized in that, The described frequency control method includes: Obtaining the operating parameters of the variable frequency drive; Judging whether the compressor is in a power supply missing state according to the operating parameters; If so, obtaining the temperature parameter of the rectifying unit and adjusting the operating frequency of the compressor according to the temperature parameter.

2. The frequency control method of the air conditioner compressor according to claim 1, wherein The adjusting the operating frequency of the compressor according to the temperature parameter includes: Judging whether the temperature parameter is greater than a preset temperature value; If so, reducing the operating frequency of the compressor.

3. The frequency control method of the air conditioner compressor according to claim 2, wherein, Including: When it is determined that the variable frequency drive is in a power supply missing state, the temperature parameter of the rectifying unit is obtained every first preset time period, and the operating frequency of the compressor is adjusted according to the temperature parameter.

4. The frequency control method of an air conditioner compressor according to claim 2, wherein The reducing the operating frequency of the compressor includes: Determining a frequency reduction value according to the operating parameters; Reducing the operating frequency of the compressor by the frequency reduction value.

5. The frequency control method of an air conditioner compressor according to claim 4, characterized in that, The determining the frequency reduction value according to the operating parameters includes: When the operating parameter is less than or equal to a first preset parameter value and greater than a second preset parameter value, making the frequency reduction value be a first preset frequency value; When the operating parameter is less than or equal to the second preset parameter value, reducing the compressor by a second preset frequency value; Wherein, the first preset parameter value is greater than the second preset parameter value, and the first preset frequency value is less than the second preset frequency value.

6. The frequency control method of the air conditioner compressor according to claim 1, characterized in that, The judging whether the variable frequency drive is in a power supply missing state according to the operating parameters includes: Judging whether the operating parameter is less than a first preset parameter value; If so, the variable frequency drive is in a power supply missing state.

7. The frequency control method of the air conditioner compressor according to claim 1, characterized in that The operating parameter is the bus ripple voltage frequency of the variable frequency drive.

8. The frequency control method of the air conditioner compressor according to claim 1, characterized in that, It further includes: In response to determining that the variable frequency drive is in a power supply missing state, adjusting the frequency limit of the compressor according to the operating parameters, and when the operating frequency of the compressor is greater than the frequency limit, reducing the operating frequency of the compressor to the frequency limit; When the operating parameter is less than or equal to a first preset parameter value and greater than a second preset parameter value, making the frequency limit of the compressor be a first preset frequency limit; When the operating parameter is less than or equal to the second preset parameter value, making the frequency limit of the compressor be a second preset frequency limit; Wherein, the first preset parameter value is greater than the second preset parameter value, and the first preset frequency limit is greater than the second preset frequency limit.

9. The frequency control method of the air conditioner compressor according to claim 1, wherein In response to the compressor being in a power supply missing state, the warning module of the air conditioner issues a warning signal.

10. An air conditioner, including a controller, the controller includes a memory, a processor and a machine-executable program stored on the memory and running on the processor, and when the processor executes the machine-executable program, the control method as described in any one of claims 1 to 9 is implemented.

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