Variable frequency compressor rotating speed control method and device of air conditioner

Abstract

The application relates to the technical field of intelligent electrical appliances, and provides a variable-frequency compressor rotating speed control method and device of an air conditioner, the method comprising the following steps: acquiring a temperature control signal input by a temperature controller and used for representing a mode state of the air conditioner; determining a target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and determining a set temperature of the air conditioner in the target mode state; the signal combination mode conversion truth table comprises a plurality of groups of corresponding comparison relations between various signal combinations and various mode states of the air conditioner; determining the rotating speed of a variable-frequency compressor based on the target mode state and the set temperature, and controlling the variable-frequency compressor to operate based on the rotating speed of the variable-frequency compressor. The variable-frequency compressor rotating speed control method of the air conditioner provided by the application can effectively improve the variable-frequency compressor rotating speed control efficiency, improve the flexibility and adjustment performance of air conditioner operation, and improve the use experience of users.

Description

Technical Field

[0001] This invention relates to the field of intelligent electrical appliance technology, and in particular to a method and apparatus for controlling the speed of an inverter compressor in an air conditioner. It also relates to an electronic device and a non-transitory computer-readable storage medium. Background Technology

[0002] In recent years, with the rapid development of the economy and society, air conditioners have become increasingly widely used in people's daily lives. As the application of air conditioners increases, the efficiency of compressor speed control under different operating modes has gradually become a focus of attention. However, currently, existing air conditioners need to directly transmit the set temperature signal to the air conditioner control board to control the compressor operation and thus regulate the air conditioning system. This control method has significant limitations, resulting in poor flexibility and adjustment performance in air conditioner operation. Therefore, providing a more effective and flexible variable frequency compressor speed control scheme for air conditioners has become an urgent problem to be solved. Summary of the Invention

[0003] This invention provides a method for controlling the speed of an inverter compressor in an air conditioner, which addresses the shortcomings of existing inverter compressor speed control schemes in the air conditioner, which have high limitations.

[0004] This invention provides a method for controlling the speed of an inverter compressor in an air conditioner, comprising:

[0005] Acquire the temperature control signal input from the thermostat, which characterizes the mode state of the air conditioner;

[0006] Based on the temperature control signal and the preset signal combination mode conversion truth table, the target mode state of the air conditioner is determined, and the set temperature of the air conditioner in the target mode state is determined; wherein, the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner;

[0007] Based on the target mode state and the set temperature, the rotational speed of the variable frequency compressor is determined, and the operation of the variable frequency compressor is controlled based on the rotational speed of the variable frequency compressor.

[0008] Furthermore, the temperature control signal includes a status indicator for compressor operation, a status indicator for four-way valve control, a status indicator for electric heating operation, and a status indicator for fan motor operation;

[0009] The process of determining the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table specifically includes:

[0010] Using the temperature control signal as an index, a matching search is performed in the signal combination mode conversion truth table to obtain the target mode state corresponding to the temperature control signal; wherein, the target mode state includes the operating fan speed of the air conditioner, the on / off state of the compressor inside the air conditioner, and / or the operating mode state of the air conditioner; the temperature control signal includes a combination of multiple state identifiers.

[0011] Furthermore, determining the set temperature of the air conditioner in the target mode specifically includes:

[0012] When the air conditioner is in cooling mode, the current first ambient temperature is obtained, the first ambient temperature is compared with a preset first ambient temperature range, the first setting level and its set temperature of the air conditioner in cooling mode are determined, and after running for a preset time period based on the first setting level and its set temperature, the corresponding second ambient temperature is recorded. If the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the first setting level is adjusted to the second setting level and its set temperature.

[0013] When the air conditioner is in heating mode, the current third ambient temperature is obtained, and the third ambient temperature is compared with the preset second ambient temperature range to determine the third setting level and its set temperature of the air conditioner in heating mode. After running for a preset time period based on the third setting level and its set temperature, the corresponding fourth ambient temperature is recorded. If the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold, the third setting level is adjusted to the fourth setting level and its set temperature.

[0014] Furthermore, after recording the corresponding second ambient temperature, the method further includes: controlling the compressor to operate based on the second setting level and its set temperature when the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold; and controlling the compressor to operate based on the first setting level and its set temperature when the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature threshold.

[0015] Furthermore, after recording the corresponding fourth ambient temperature, the method further includes: if the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, controlling the compressor to operate based on the fourth setting level and its set temperature; if the difference between the fourth ambient temperature and the third ambient temperature is greater than the preset second temperature threshold, controlling the compressor to operate based on the third setting level and its set temperature.

[0016] Furthermore, determining the speed of the variable frequency compressor based on the target mode state and the set temperature specifically includes:

[0017] Based on the target mode state and the set temperature, the operating frequency of the variable frequency compressor is determined, and the speed of the variable frequency compressor is determined based on the operating frequency; wherein, the operating frequency and speed of the variable frequency compressor are directly proportional.

[0018] The method of controlling the operation of the variable frequency compressor based on its rotational speed specifically includes: outputting a signal of the rotational speed value of the variable frequency compressor to a corresponding frequency converter to control the variable frequency compressor to operate at the specified rotational speed.

[0019] Furthermore, after acquiring the temperature control signal input from the thermostat to characterize the mode state of the air conditioner, the method further includes: triggering the operation of the fan motor when the target mode state is determined to be a single air supply mode state based on the temperature control signal and a preset signal combination mode conversion truth table.

[0020] The present invention also provides a variable frequency compressor speed control device for an air conditioner, comprising:

[0021] A temperature control signal acquisition unit is used to acquire a temperature control signal input from a temperature controller that characterizes the mode state of the air conditioner;

[0022] A temperature determination unit is configured to determine the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and to determine the set temperature of the air conditioner in the target mode state; wherein, the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner.

[0023] The compressor speed control unit is used to determine the speed of the variable frequency compressor based on the target mode state and the set temperature, and to control the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0024] Furthermore, the temperature control signal includes a status indicator for compressor operation, a status indicator for four-way valve control, a status indicator for electric heating operation, and a status indicator for fan motor operation;

[0025] The set temperature determination unit is specifically used to: use the temperature control signal as an index to perform a matching search in the signal combination mode conversion truth table to obtain the target mode state corresponding to the temperature control signal; wherein, the target mode state includes the operating fan speed of the air conditioner, the on / off state of the compressor inside the air conditioner, and / or the operating mode state of the air conditioner; the temperature control signal includes a combination of multiple state identifiers.

[0026] Furthermore, the set temperature determining unit is specifically used for:

[0027] When the air conditioner is in cooling mode, the current first ambient temperature is obtained, the first ambient temperature is compared with a preset first ambient temperature range, the first setting level and its set temperature of the air conditioner in cooling mode are determined, and after running for a preset time period based on the first setting level and its set temperature, the corresponding second ambient temperature is recorded. If the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the first setting level is adjusted to the second setting level and its set temperature.

[0028] When the air conditioner is in heating mode, the current third ambient temperature is obtained, and the third ambient temperature is compared with the preset second ambient temperature range to determine the third setting level and its set temperature of the air conditioner in heating mode. After running for a preset time period based on the third setting level and its set temperature, the corresponding fourth ambient temperature is recorded. If the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold, the third setting level is adjusted to the fourth setting level and its set temperature.

[0029] Furthermore, after recording the corresponding second ambient temperature, it also includes:

[0030] When the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the compressor is controlled to operate based on the second setting level and its set temperature; when the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature threshold, the compressor is controlled to operate based on the first setting level and its set temperature.

[0031] Furthermore, after recording the corresponding fourth ambient temperature, it also includes:

[0032] When the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, the compressor is controlled to operate based on the fourth setting level and its set temperature; when the difference between the fourth ambient temperature and the third ambient temperature is greater than the preset second temperature threshold, the compressor is controlled to operate based on the third setting level and its set temperature.

[0033] Furthermore, the compressor speed control unit is specifically used for:

[0034] Based on the target mode state and the set temperature, the operating frequency of the variable frequency compressor is determined, and the speed of the variable frequency compressor is determined based on the operating frequency; wherein, the operating frequency and speed of the variable frequency compressor are directly proportional.

[0035] The compressor speed control unit is specifically used to output a signal of the speed value of the variable frequency compressor to the corresponding frequency converter, so as to control the variable frequency compressor to operate at the speed.

[0036] Furthermore, after acquiring the temperature control signal input from the thermostat to characterize the mode state of the air conditioner, the method further includes: triggering the operation of the fan motor when the target mode state is determined to be a single air supply mode state based on the temperature control signal and a preset signal combination mode conversion truth table.

[0037] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the variable frequency compressor speed control method of any of the above-described air conditioners.

[0038] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the variable frequency compressor speed control method for any of the above-described air conditioners.

[0039] The present invention provides a method for controlling the speed of an inverter compressor in an air conditioner. This method acquires a temperature control signal input from a thermostat, which characterizes the air conditioner's mode state. Based on the temperature control signal and a preset signal combination mode conversion truth table, it determines the target mode state of the air conditioner and the set temperature in that target mode state. Then, based on the target mode state and the set temperature, it determines the speed of the inverter compressor and controls its operation. This method effectively improves the speed control efficiency of the inverter compressor, enhances the flexibility and adjustment performance of the air conditioner, and improves the user experience. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is one of the flowcharts illustrating the variable frequency compressor speed control method for an air conditioner provided by the present invention;

[0042] Figure 2 This is the second flowchart illustrating the variable frequency compressor speed control method for air conditioners provided by the present invention;

[0043] Figure 3 This is a flowchart of the refrigeration operation process in the variable frequency compressor speed control method for air conditioners provided by the present invention;

[0044] Figure 4 This is a schematic diagram of the startup process of an air conditioner in cooling operation mode provided by the present invention;

[0045] Figure 5 This is a schematic diagram of the startup process of the air conditioner in heating mode provided by the present invention;

[0046] Figure 6 This is the third flowchart illustrating the variable frequency compressor speed control method for air conditioners provided by the present invention;

[0047] Figure 7 This is a schematic diagram of the structure of the variable frequency compressor speed control device for an air conditioner provided by the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0050] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this invention are used to distinguish similar users and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] The following is a detailed description of embodiments of the variable frequency compressor speed control method for air conditioners based on the present invention. For example... Figure 1The diagram shown is a flowchart illustrating the variable frequency compressor speed control method for an air conditioner provided by the present invention. The specific implementation process includes the following steps:

[0052] Step 101: Obtain the temperature control signal input from the thermostat, which is used to characterize the mode state of the air conditioner.

[0053] Specifically, the temperature control signal can be a 24Vac ON / OFF signal, meaning the air conditioner uses a 24Vac ON / OFF signal as a trigger, where 24VDC is the required input voltage for the appliance, and ON and OFF represent the on and off states. In actual implementation, the 24Vac ON / OFF signal can be received and input into the control circuit. The temperature control signal includes, but is not limited to, any one or more of the following: compressor operation status indicators Y1 and Y2, four-way valve control status indicator B, electric heating operation status indicator W1, fan motor operation status indicator, 24V common terminal C (AC power supply common neural), and 24V live wire R (AC power supply line). Y1 can represent compressor stage 1; Y2 can represent compressor stage 2; B can represent four-way valve control status; and W1 can represent electric heating status. Different combinations of status indicators correspond to different mode states.

[0054] Step 102: Based on the temperature control signal and the preset signal combination mode conversion truth table, determine the target mode state of the air conditioner and determine the set temperature of the air conditioner in the target mode state; wherein, the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner.

[0055] In determining the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, the temperature control signal is used as an index to perform a matching search in the signal combination mode conversion truth table to obtain the target mode state corresponding to the temperature control signal. The target mode state includes the air conditioner's operating fan speed, the on / off state of the compressor inside the air conditioner, and / or the air conditioner's operating mode state. The temperature control signal includes a combination of multiple state identifiers. For example, the signal combination mode conversion truth table may include the following: W1 = 0, Y1 = 0, Y2 = 0, B = 0, corresponding to the air conditioner being off; W1 = 0, Y1 = 0, Y2 = 0, B = 1, corresponding to the air conditioner being off; W1 = 1, Y1 = 0, Y2 = 0, B = 0, corresponding to the air conditioner being off; W1 = 1, Y1 = 0, Y2 = 0, B = 1, corresponding to the air conditioner being off. When W1 is 1, Y1 is 1, Y2 is 0, and B is 1, the corresponding operating mode is: air conditioner heating mode - compressor on, frequency limit 70% - indoor unit electric heating on; when W1 is 1, Y1 is 1, Y2 is 1, and B is 1, the corresponding operating mode is: air conditioner heating mode - compressor on, frequency limit 100% - indoor unit electric heating on; when W1 is 1, Y1 is 0, Y2 is 1, and B is 1, the corresponding operating mode is: air conditioner heating mode - compressor on, frequency limit 100% - indoor unit electric heating on. When W1 is 0, Y1 is 0, Y2 is 1, and B is 1, the corresponding operating mode is air conditioner heating mode - compressor on, with a frequency limit of 100%. When W1 is 0, Y1 is 1, Y2 is 1, and B is 1, the corresponding operating mode is air conditioner heating mode - compressor on, with a frequency limit of 100%. When W1 is 0, Y1 is 1, Y2 is 0, and B is 1, the corresponding operating mode is air conditioner heating mode - compressor on, with a frequency limit of 70%. When W1 is 0, Y1 is 1, Y2 is 0, and B is 0, the corresponding operating mode is air conditioner cooling mode - compressor on, with a frequency limit of 70%. When W1 is 0, Y1 is 1, Y2 is 1, and B is 0, the corresponding operating mode is air conditioner cooling mode - compressor on, with a frequency limit of 100%. When W1 is 0, Y1 is 0, Y2 is 1, and B is 0, the corresponding operating mode is air conditioner cooling mode - compressor on, with a frequency limit of 100%. When W1 is 0, Y1 is 1, Y2 is 0, and B is 0, the corresponding operating mode is Air Conditioner Error - Shutdown. Similarly, when W1 is 1, Y1 is 1, Y2 is 1, and B is 0, the corresponding operating mode is Air Conditioner Error - Shutdown. Here, 0 indicates a 0V voltage at terminal C, and 1 indicates a 24V voltage at terminal C.

[0056] It should be noted that the mode states in the truth table of the signal combination mode conversion can also be other cooling or heating working modes, and are not specifically limited here.

[0057] like Figure 2 As shown, when the air conditioner is in cooling mode, the current first ambient temperature is acquired, and compared with a preset first ambient temperature range to determine the first setting level and its set temperature for the air conditioner in cooling mode. After running for a preset time period based on the first setting level and its set temperature, the corresponding second ambient temperature is recorded. If the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the first setting level is lowered to the second setting level and its set temperature. Specifically, as shown... Figure 4 As shown in the circle, during startup, when the inverter compressor frequency increases, it pauses for 30 seconds at each of the 50 Hz, 60 Hz, and 70 Hz points. However, if the target frequency is lower than one of these pause points, it only pauses at the previous pause point. Additionally, when the air conditioner is in heating mode, the current third ambient temperature is acquired and compared with a preset second ambient temperature range to determine the third setting level and its set temperature for heating mode. After running for a preset time period based on the third setting level and its set temperature, the corresponding fourth ambient temperature is recorded. If the difference between the fourth and third ambient temperatures is less than or equal to a preset second temperature threshold, the third setting level is increased to the fourth setting level and its set temperature. Furthermore, if the target mode is determined to be a single-fan mode based on the temperature control signal and a preset signal combination mode conversion truth table, the fan motor is triggered. Specifically, as follows... Figure 5 As shown in the circle, during startup, when the frequency of the variable frequency compressor rises, it should pause for 30 seconds at each of the 50 Hz, 60 Hz, and 70 Hz points. However, if the reference target frequency is lower than one of these pause points, it only needs to pause at the point before it.

[0058] As shown in the Tset table below, when the air conditioner is in cooling mode, the first ambient temperature can be Tai, and the first ambient temperature range can include Tai ≤ 20℃, 20℃ < Tai ≤ 25℃, and Tai > 25℃. If the first setting level and its set temperature can be Tset LEVEL = 1 and Tset = Tai - 1 respectively, then the corresponding second setting level and its set temperature can be Tset LEVEL = 2 and Tset = Tai - 2 respectively. If the first setting level and its set temperature can be Tset LEVEL = 2 and Tset = Tai - 2 respectively, then the corresponding second setting level and its set temperature can be Tset LEVEL = 3 and Tset = Tai - 4 respectively, without specific limitations here. From Tset LEVEL = 1 to Tset LEVEL = 3, the cooling speed increases.

[0059] like Figure 2 and 3 As shown, when the air conditioner is in heating mode, the third ambient temperature can be Tai, and the second ambient temperature range can also include Tai ≤ 20℃, 20℃ < Tai ≤ 25℃, and Tai > 25℃. If the third setting level and its set temperature can be Tset LEVEL = 1 and Tset = Tai + 1 respectively, then the corresponding fourth setting level and its set temperature can be Tset LEVEL = 2 and Tset = Tai + 2 respectively. If the third setting level and its set temperature can be Tset LEVEL = 2 and Tset = Tai + 2 respectively, then the corresponding fourth setting level and its set temperature can be Tset LEVEL = 3 and Tset = Tai + 4 respectively, without specific limitations here. The heating speed increases from Tset LEVEL = 1 to Tset LEVEL = 3.

[0060] Tset table

[0061]

[0062] Furthermore, after recording the corresponding second ambient temperature, the compressor can be controlled to operate based on the second setting level and its set temperature if the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold; and if the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature threshold, the compressor can be controlled to operate based on the first setting level and its set temperature. Additionally, after recording the corresponding fourth ambient temperature, the compressor can be controlled to operate based on the fourth setting level and its set temperature if the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold; and if the difference between the fourth ambient temperature and the third ambient temperature is greater than the preset second temperature threshold, the compressor can be controlled to operate based on the third setting level and its set temperature.

[0063] Step 103: Based on the target mode state and the set temperature, determine the speed of the variable frequency compressor, and control the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0064] Specifically, based on the target mode state and the set temperature, the operating frequency of the variable frequency compressor can be determined through a matching selection method. Based on the operating frequency, the speed of the variable frequency compressor is determined, and then the speed signal is output to the corresponding inverter to control the compressor to operate at the specified speed. The operating frequency and speed of the variable frequency compressor are directly proportional; the higher the frequency, the higher the compressor speed. The compressor speed directly affects the efficiency of the air conditioner. The inverter is a control system used to control and adjust the compressor speed, thereby improving the energy efficiency ratio.

[0065] During fan speed setting, the desired fan speed level is selected by operating the fan speed button on the air conditioner panel. The control circuit receives the fan speed signal and stores the corresponding fan speed value for subsequent control. During power on / off control, the power on / off state is selected by operating the power on / off button on the air conditioner panel. The power on / off signal is received and processed accordingly by the control circuit. During mode signal control, the air conditioner's operating mode can be selected, such as cooling mode, heating mode, or fan mode. The mode signal is also received and processed accordingly by the control circuit. In determining the compressor speed, based on the set fan speed, power on / off state, mode signal, ambient temperature Tset (indoor and outdoor ambient temperatures), Pd (outdoor unit high-pressure), and PS (outdoor unit low-pressure, compressor discharge pressure, and compressor suction pressure), the control circuit calculates the corresponding compressor speed. This speed value can be calculated and adjusted based on known speed curves and operating parameters. For example, for an ambient temperature of 35 degrees Celsius, a frequency of 40Hz or higher is required; for 40 degrees Celsius, a frequency of 60Hz or higher is required. During compressor speed control, the control circuit outputs the calculated compressor speed signal to the frequency converter to control the compressor's operation. Since the set temperature signal cannot be directly transmitted, this method indirectly controls the compressor speed by setting ambient temperature, Pd, PS, fan speed, on / off status, and operating mode. This invention can control the air conditioning system's operating status and compressor speed by setting other parameters without a specific set temperature signal, achieving both energy saving and comfort. Currently, only a set temperature signal can be sent to the air conditioning control board, lacking flexibility. Figure 6 As shown, the present invention overcomes the limitation of not being able to transmit a specific set temperature by using a variable frequency air conditioner compressor speed control method with a 24Vac ON / OFF signal, thereby improving the flexibility of the variable frequency compressor control of the air conditioner.

[0066] In addition, in this embodiment of the invention, the air conditioner can also perform shutdown control: when the air conditioner is operating in cooling or heating mode, if the inverter compressor receives a shutdown signal and its current frequency is greater than 55Hz (EE), the inverter compressor can reduce its frequency to 48Hz at 2Hz / s and then stop directly; if the current frequency is less than 55Hz, it will stop directly upon receiving the shutdown signal. This control method can prevent excessive stress from sudden shutdown during high-frequency operation. The shutdown frequency point is determined after considering stress. After the inverter compressor stops, the fan performs residual heat blowing control before stopping.

[0067] The present invention provides a method for controlling the speed of an inverter compressor in an air conditioner. This method acquires a temperature control signal input from a thermostat, which characterizes the air conditioner's mode state. Based on the temperature control signal and a preset signal combination mode conversion truth table, it determines the target mode state of the air conditioner and the set temperature in that target mode state. Then, based on the target mode state and the set temperature, it determines the speed of the inverter compressor and controls its operation. This method effectively improves the speed control efficiency of the inverter compressor, enhances the flexibility and adjustment performance of the air conditioner, and improves the user experience.

[0068] The variable frequency compressor speed control device for air conditioners provided by the present invention is described below. The variable frequency compressor speed control device for air conditioners described below can be referred to in correspondence with the variable frequency compressor speed control method for air conditioners described above.

[0069] refer to Figure 7 The diagram shown is a structural schematic of the variable frequency compressor speed control device for an air conditioner provided by the present invention. The variable frequency compressor speed control device for an air conditioner according to the present invention specifically includes the following parts:

[0070] Temperature control signal acquisition unit 701 is used to acquire the temperature control signal input by the temperature controller, which is used to characterize the mode state of the air conditioner;

[0071] The temperature setting determination unit 702 is used to determine the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and to determine the set temperature of the air conditioner in the target mode state; wherein, the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner.

[0072] The compressor speed control unit is used to determine the speed of the variable frequency compressor based on the target mode state and the set temperature, and to control the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0073] Furthermore, the temperature control signal includes a status indicator for compressor operation, a status indicator for four-way valve control, a status indicator for electric heating operation, and a status indicator for fan motor operation;

[0074] The set temperature determination unit is specifically used to: use the temperature control signal as an index to perform a matching search in the signal combination mode conversion truth table to obtain the target mode state corresponding to the temperature control signal; wherein, the target mode state includes the operating fan speed of the air conditioner, the on / off state of the compressor inside the air conditioner, and / or the operating mode state of the air conditioner; the temperature control signal includes a combination of multiple state identifiers.

[0075] Furthermore, the set temperature determining unit is specifically used for:

[0076] When the air conditioner is in cooling mode, the current first ambient temperature is obtained, the first ambient temperature is compared with a preset first ambient temperature range, the first setting level and its set temperature of the air conditioner in cooling mode are determined, and after running for a preset time period based on the first setting level and its set temperature, the corresponding second ambient temperature is recorded. If the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the first setting level is lowered to the second setting level and its set temperature.

[0077] When the air conditioner is in heating mode, the current third ambient temperature is obtained, and the third ambient temperature is compared with a preset second ambient temperature range to determine the third setting level and its set temperature of the air conditioner in heating mode. After running for a preset time period based on the third setting level and its set temperature, the corresponding fourth ambient temperature is recorded. If the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, the third setting level is increased to the fourth setting level and its set temperature.

[0078] Furthermore, after recording the corresponding second ambient temperature, it also includes:

[0079] When the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the compressor is controlled to operate based on the second setting level and its set temperature; when the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature threshold, the compressor is controlled to operate based on the first setting level and its set temperature.

[0080] Furthermore, after recording the corresponding fourth ambient temperature, it also includes:

[0081] When the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, the compressor is controlled to operate based on the fourth setting level and its set temperature; when the difference between the fourth ambient temperature and the third ambient temperature is greater than the preset second temperature threshold, the compressor is controlled to operate based on the third setting level and its set temperature.

[0082] Furthermore, the compressor speed control unit is specifically used for:

[0083] Based on the target mode state and the set temperature, the operating frequency of the variable frequency compressor is determined, and the speed of the variable frequency compressor is determined based on the operating frequency; wherein, the operating frequency and speed of the variable frequency compressor are directly proportional.

[0084] The compressor speed control unit is specifically used to output a signal of the speed value of the variable frequency compressor to the corresponding frequency converter, so as to control the variable frequency compressor to operate at the speed.

[0085] Furthermore, after acquiring the temperature control signal input from the thermostat to characterize the mode state of the air conditioner, the method further includes: triggering the operation of the fan motor when the target mode state is determined to be a single air supply mode state based on the temperature control signal and a preset signal combination mode conversion truth table.

[0086] The variable frequency compressor speed control device for air conditioners provided by this invention acquires a temperature control signal input from a thermostat, which characterizes the air conditioner's mode state. Based on the temperature control signal and a preset signal combination mode conversion truth table, it determines the target mode state of the air conditioner and the set temperature of the air conditioner in the target mode state. Then, based on the target mode state and the set temperature, it determines the speed of the variable frequency compressor and controls the operation of the variable frequency compressor based on its speed. This method effectively improves the speed control efficiency of the variable frequency compressor, enhances the flexibility and adjustment performance of the air conditioner, and improves the user experience.

[0087] Figure 8 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 8 As shown, the electronic device may include: a processor 801, a communication interface 804, a memory 802, and a communication bus 803. The processor 801, communication interface 804, and memory 802 communicate with each other via the communication bus 803. The processor 801 can call logic instructions in the memory 802 to execute a variable frequency compressor speed control method for an air conditioner. This method includes: acquiring a temperature control signal input from a thermostat to characterize the air conditioner's mode state; determining the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and determining the set temperature of the air conditioner in the target mode state; wherein the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner; determining the speed of the variable frequency compressor based on the target mode state and the set temperature, and controlling the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0088] Furthermore, the logical instructions in the aforementioned memory 802 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer is able to execute the variable frequency compressor speed control method for an air conditioner provided by the above methods, the method comprising: acquiring a temperature control signal input from a thermostat to characterize the mode state of the air conditioner; determining a target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and determining a set temperature of the air conditioner in the target mode state; wherein the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner; determining the speed of the variable frequency compressor based on the target mode state and the set temperature, and controlling the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0090] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the variable frequency compressor speed control method for the air conditioner provided above. The method includes: acquiring a temperature control signal input from a thermostat to characterize the mode state of the air conditioner; determining a target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and determining a set temperature of the air conditioner in the target mode state; wherein the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner; determining the speed of the variable frequency compressor based on the target mode state and the set temperature, and controlling the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0092] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the speed of an inverter compressor in an air conditioner, characterized in that, include: Acquire the temperature control signal input from the thermostat, which characterizes the mode state of the air conditioner; Based on the temperature control signal and the preset signal combination mode conversion truth table, the target mode state of the air conditioner is determined, and the set temperature of the air conditioner in the target mode state is determined; wherein, the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner; Determining the set temperature of the air conditioner in the target mode state specifically includes: When the air conditioner is in cooling mode, the current first ambient temperature is obtained, and the first ambient temperature is compared with a preset first ambient temperature range to determine the first setting level and its set temperature of the air conditioner in cooling mode. After running for a preset time period based on the first setting level and its set temperature, the corresponding second ambient temperature is recorded. When the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the first setting level is adjusted to the second setting level and its set temperature. From the first setting level to the second setting level, the cooling speed becomes faster. When the air conditioner is in heating mode, the current third ambient temperature is obtained, and the third ambient temperature is compared with a preset second ambient temperature range to determine the third setting level and its set temperature of the air conditioner in heating mode. After running for a preset time period based on the third setting level and its set temperature, the corresponding fourth ambient temperature is recorded. If the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, the third setting level is adjusted to the fourth setting level and its set temperature. The heating speed is accelerated from the third setting level to the fourth setting level. Based on the target mode state and the set temperature, the rotational speed of the variable frequency compressor is determined, and the operation of the variable frequency compressor is controlled based on the rotational speed of the variable frequency compressor.

2. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that, The temperature control signals include status indicators for compressor operation, four-way valve control, electric heating operation, and fan motor operation. The process of determining the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table specifically includes: Using the temperature control signal as an index, a matching search is performed in the signal combination mode conversion truth table to obtain the target mode state corresponding to the temperature control signal; wherein, the target mode state includes the operating fan speed of the air conditioner, the on / off state of the compressor inside the air conditioner, and / or the operating mode state of the air conditioner; the temperature control signal includes a combination of multiple state identifiers.

3. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that, After recording the corresponding second ambient temperature, the method further includes: when the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, controlling the compressor to operate based on the second setting level and its set temperature; when the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature threshold, controlling the compressor to operate based on the first setting level and its set temperature.

4. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that, After recording the corresponding fourth ambient temperature, the method further includes: if the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, controlling the compressor to operate based on the fourth setting level and its set temperature; if the difference between the fourth ambient temperature and the third ambient temperature is greater than the preset second temperature threshold, controlling the compressor to operate based on the third setting level and its set temperature.

5. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that, Determining the speed of the variable frequency compressor based on the target mode state and the set temperature specifically includes: Based on the target mode state and the set temperature, the operating frequency of the variable frequency compressor is determined, and the speed of the variable frequency compressor is determined based on the operating frequency; wherein, the operating frequency and speed of the variable frequency compressor are directly proportional. The method of controlling the operation of the variable frequency compressor based on its rotational speed specifically includes: outputting a signal of the rotational speed value of the variable frequency compressor to a corresponding frequency converter to control the variable frequency compressor to operate at the specified rotational speed.

6. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that, After acquiring the temperature control signal input from the thermostat, which characterizes the mode state of the air conditioner, the method further includes: triggering the operation of the fan motor if the target mode state is determined to be a single air supply mode state based on the temperature control signal and a preset signal combination mode conversion truth table.

7. A variable frequency compressor speed control device for an air conditioner, characterized in that, include: A temperature control signal acquisition unit is used to acquire a temperature control signal input from a temperature controller that characterizes the mode state of the air conditioner; A temperature determination unit is configured to determine the target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and to determine the set temperature of the air conditioner in the target mode state; wherein, the signal combination mode conversion truth table contains multiple sets of correspondences between various signal combinations and various mode states of the air conditioner. Determining the set temperature of the air conditioner in the target mode state specifically includes: When the air conditioner is in cooling mode, the current first ambient temperature is obtained, and the first ambient temperature is compared with a preset first ambient temperature range to determine the first setting level and its set temperature of the air conditioner in cooling mode. After running for a preset time period based on the first setting level and its set temperature, the corresponding second ambient temperature is recorded. When the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, the first setting level is adjusted to the second setting level and its set temperature. From the first setting level to the second setting level, the cooling speed becomes faster. When the air conditioner is in heating mode, the current third ambient temperature is obtained, and the third ambient temperature is compared with a preset second ambient temperature range to determine the third setting level and its set temperature of the air conditioner in heating mode. After running for a preset time period based on the third setting level and its set temperature, the corresponding fourth ambient temperature is recorded. If the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to a preset second temperature threshold, the third setting level is adjusted to the fourth setting level and its set temperature. The heating speed is accelerated from the third setting level to the fourth setting level. The compressor speed control unit is used to determine the speed of the variable frequency compressor based on the target mode state and the set temperature, and to control the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the variable frequency compressor speed control method for the air conditioner as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the variable frequency compressor speed control method for the air conditioner as described in any one of claims 1 to 6.

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