Method and device for controlling rotating speed of inverter compressor of air conditioner

Abstract

The invention relates to the technical field of intelligent electric appliances, and provides a rotating speed control method and device for an inverter compressor of an air conditioner. The method comprises the steps that a temperature control signal input by a temperature controller and used for representing the mode state of the air conditioner is obtained; based on the temperature control signal and a 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; the signal combination mode conversion truth table comprises a plurality of groups of corresponding contrast relationships between various signal combinations and various mode states of the air conditioner; and determining the rotating speed of the inverter compressor based on the target mode state and the set temperature, and controlling the inverter compressor to operate based on the rotating speed of the inverter compressor. According to the inverter compressor rotating speed control method of the air conditioner, the inverter compressor rotating speed control efficiency can be effectively improved, the operation flexibility and adjusting performance of the air conditioner are improved, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent electrical appliance technology, and in particular to a method and device for controlling the speed of a variable frequency compressor of an air conditioner, and also to an electronic device and a non-transient computer-readable storage medium. Background Art

[0002] In recent years, with the rapid development of the economy and society, various air-conditioning devices are being used more and more widely in people's daily lives. With the increasing application of air-conditioning devices, the efficiency of compressor speed control in different operating modes has gradually become a focus of attention. However, when the existing air-conditioning devices are running in different modes, it is necessary to directly transmit the set specific temperature signal to the air-conditioning control board to control the operation of the compressor, thereby realizing the operation adjustment of the air-conditioning system. This control method has high limitations, and the flexibility and adjustment performance of the air-conditioning operation are poor. Therefore, how to provide a more effective and flexible variable frequency compressor speed control scheme for air conditioners has become a problem that needs to be solved urgently. Summary of the invention

[0003] The present invention provides a method for controlling the speed of a variable frequency compressor of an air conditioner, which is used to solve the defect that the speed control scheme of the variable frequency compressor of the air conditioner in the prior art has high limitations.

[0004] The present invention provides a method for controlling the speed of a variable frequency compressor of an air conditioner, comprising:

[0005] Acquiring a temperature control signal input by a thermostat for representing a mode state of the air conditioner;

[0006] Based on the temperature control signal and a preset signal combination mode conversion truth table, a target mode state of the air conditioner is determined, and a set temperature of the air conditioner under the target mode state is determined; wherein the signal combination mode conversion truth table includes a plurality of corresponding sets of comparison relationships between various signal combinations and various mode states of the air conditioner;

[0007] Based on the target mode state and the set temperature, a rotation speed of the inverter compressor is determined, and the operation of the inverter compressor is controlled based on the rotation speed of the inverter compressor.

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

[0009] The step 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 match search is performed in the signal combination mode conversion truth table to obtain a target mode state corresponding to the temperature control signal; wherein the target mode state includes the operating wind speed of the air conditioner, the on / off state of the compressor in the air conditioner and / or the operating mode state of the air conditioner; and the temperature control signal includes a combination of multiple state identifiers.

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

[0012] When the air conditioner is in a cooling operation mode, obtaining a current first ambient temperature, comparing the first ambient temperature with a preset first ambient temperature interval, determining a first setting level and a setting temperature of the air conditioner in the cooling operation mode, and recording a corresponding second ambient temperature after running for a preset time period based on the first setting level and the setting temperature, and when the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, adjusting the first setting level down to a second setting level and a setting temperature;

[0013] When the air conditioner is in the heating operation mode, the current third ambient temperature is obtained, the third ambient temperature is compared with the preset second ambient temperature range, the third setting level and the setting temperature of the air conditioner in the cooling operation mode are determined, and after running for a preset time period based on the third setting level and the setting temperature, the corresponding fourth ambient temperature is recorded, and when 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 lowered to the fourth setting level and the setting temperature.

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

[0015] Furthermore, after recording the corresponding fourth ambient temperature, it also includes: when the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold, controlling the operation of the compressor 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, controlling the operation of the compressor based on the third setting level and its set temperature.

[0016] Further, the 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 corresponding to the variable frequency compressor is determined, and based on the operating frequency, the speed value of the variable frequency compressor is determined; wherein the operating frequency and the speed of the variable frequency compressor are in direct proportion;

[0018] The controlling the operation of the variable frequency compressor based on the rotation speed of the variable frequency compressor specifically includes: outputting a signal of the rotation speed value of the variable frequency compressor to a corresponding inverter to control the operation of the variable frequency compressor at the rotation speed.

[0019] Furthermore, after obtaining the temperature control signal input by the thermostat to characterize the mode state of the air conditioner, it also includes: triggering the operation of the fan motor when it is determined that the target mode state is 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, used to acquire a temperature control signal input by a thermostat and used to characterize a mode state of the air conditioner;

[0022] a set temperature determination unit, configured to determine a target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and determine a set temperature of the air conditioner under the target mode state; wherein the signal combination mode conversion truth table includes a plurality of corresponding sets of comparison relationships 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 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 mark of the compressor operation, a status mark of the four-way valve control, a status mark of the electric heating operation, and a status mark of the fan motor operation;

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

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

[0027] When the air conditioner is in a cooling operation mode, obtaining a current first ambient temperature, comparing the first ambient temperature with a preset first ambient temperature interval, determining a first setting level and a setting temperature of the air conditioner in the cooling operation mode, and recording a corresponding second ambient temperature after running for a preset time period based on the first setting level and the setting temperature, and when the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, adjusting the first setting level down to a second setting level and a setting temperature;

[0028] When the air conditioner is in the heating operation mode, the current third ambient temperature is obtained, the third ambient temperature is compared with the preset second ambient temperature range, the third setting level and the setting temperature of the air conditioner in the cooling operation mode are determined, and after running for a preset time period based on the third setting level and the setting temperature, the corresponding fourth ambient temperature is recorded, and when 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 lowered to the fourth setting level and the setting temperature.

[0029] Furthermore, after recording the corresponding second ambient temperature, the method further includes:

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

[0031] Furthermore, after recording the corresponding fourth ambient temperature, the method further includes:

[0032] When the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold, the operation of the compressor is controlled 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 operation of the compressor is controlled 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 corresponding to the variable frequency compressor is determined, and based on the operating frequency, the speed value of the variable frequency compressor is determined; wherein the operating frequency and the speed of the variable frequency compressor are in direct proportion;

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

[0036] Furthermore, after obtaining the temperature control signal input by the thermostat to characterize the mode state of the air conditioner, it also includes: triggering the operation of the fan motor when it is determined that the target mode state is 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, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the variable frequency compressor speed control method of the air conditioner as described above are implemented.

[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 any of the above-mentioned methods for controlling the speed of a variable frequency compressor of an air conditioner.

[0039] The variable frequency compressor speed control method of the air conditioner provided by the present invention obtains the temperature control signal input by the thermostat to characterize the mode state of the air conditioner, and determines the target mode state of the air conditioner based on the temperature control signal and the preset signal combination mode conversion truth table, and determines the set temperature of the air conditioner in the target mode state, and then determines the speed of the variable frequency compressor based on the target mode state and the set temperature, and controls the operation of the variable frequency compressor based on the speed of the variable frequency compressor. This method can effectively improve the speed control efficiency of the variable frequency compressor, enhance the flexibility and adjustment performance of the air conditioner operation, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0042] Figure 2 This is the second flow chart of the variable frequency compressor speed control method for the air conditioner provided by the present invention;

[0043] Figure 3 It is a refrigeration operation flow chart of the variable frequency compressor speed control method of the air conditioner provided by the present invention;

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

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

[0046] Figure 6 This is the third flow chart of the variable frequency compressor speed control method for the air conditioner provided by the present invention;

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

[0048] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that the terms "first", "second", etc. in the specification of the present invention and the above-mentioned drawings are used to distinguish similar users, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] The following is a detailed description of an embodiment of the variable frequency compressor speed control method for an air conditioner according to the present invention. Figure 1As shown, it is a flow chart of the variable frequency compressor speed control method of the air conditioner provided by the present invention, and the specific implementation process includes the following steps:

[0052] Step 101: Obtain a temperature control signal input by a thermostat and used to represent the mode state of the air conditioner.

[0053] Specifically, the temperature control signal may be a 24Vac ON / OFF signal, that is, the air conditioner uses a 24Vac ON / OFF signal as a trigger, wherein 24vdc is the input voltage required by the appliance, and ON and OFF represent the on state and the off state. In the actual implementation process, a 24Vac ON / OFF signal may be received and input into the control circuit. The temperature control signal includes but is not limited to any one or more of the state identifiers Y1 and Y2 of the compressor operation, the state identifier B of the four-way valve control, the state identifier W1 of the electric heating operation, and the state identifier of the fan motor operation, 24V common terminal C (AC power supply commonneural), 24V live wire R (AC power supply line), etc. Y1 may represent compressor level 1; Y2 may represent compressor level 2; B may represent the four-way valve control state; and W1 may represent the electric heating state. Different combinations of state identifiers correspond to different mode states.

[0054] Step 102: Based on the temperature control signal and a 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 under the target mode state; wherein the signal combination mode conversion truth table includes multiple groups of corresponding comparison relationships between various signal combinations and various mode states of the air conditioner.

[0055] In the process of determining the target mode state of the air conditioner based on the temperature control signal and the preset signal combination mode conversion truth table, the temperature control signal is used as an index to match and 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 wind speed of the air conditioner, the on / off state of the compressor in the air conditioner and / or the operating mode state of the air conditioner; the temperature control signal includes a combination of multiple state identifiers. For example, the signal combination mode conversion truth table may include the following contents: W1 is 0, Y1 is 0, Y2 is 0, and B is 0, and the corresponding operating mode state is that the air conditioner is stopped; W1 is 0, Y1 is 0, Y2 is 0, and B is 1, and the corresponding operating mode state is that the air conditioner is stopped; W1 is 1, Y1 is 0, Y2 is 0, and B is 0, and the corresponding operating mode state is that the air conditioner is stopped; W1 is 1, Y1 is 0, Y2 is 0, and B is 0, and the corresponding operating mode state is that the air conditioner is stopped; W1 is 1, Y1 is 0, Y2 is 0, and B is 1, and the corresponding operating mode state is that the air conditioner is stopped. W1 is 1, Y1 is 1, Y2 is 0, and B is 1. The corresponding operating mode state is air conditioner heating mode - compressor on, frequency upper limit 70% - internal electromechanical heating on; W1 is 1, Y1 is 1, Y2 is 1, and B is 1. The corresponding operating mode state is air conditioner heating mode - compressor on, frequency upper limit 100% - internal electromechanical heating on; W1 is 1, Y1 is 0, Y2 is 1, and B is 1. The corresponding operating mode state is air conditioner heating mode - compressor on, frequency upper limit 100% - internal electromechanical heating on. W1 is 0, Y1 is 0, Y2 is 1, and B is 1, and the corresponding operating mode state is the air conditioner heating mode-compressor on, and the upper frequency limit is 100%; W1 is 0, Y1 is 1, Y2 is 1, and B is 1, and the corresponding operating mode state is the air conditioner heating mode-compressor on, and the upper frequency limit is 100%; W1 is 0, Y1 is 1, Y2 is 0, and B is 1, and the corresponding operating mode state is the air conditioner heating mode-compressor on, and the upper frequency limit is 70%. W1 is 0, Y1 is 1, Y2 is 0, and B is 0, and the corresponding operating mode state is the air conditioner cooling mode-compressor on, and the upper frequency limit is 70%; W1 is 0, Y1 is 1, Y2 is 1, and B is 0, and the corresponding operating mode state is the air conditioner cooling mode-compressor on, and the upper frequency limit is 100%; W1 is 0, Y1 is 0, Y2 is 1, and B is 0, and the corresponding operating mode state is the air conditioner cooling mode-compressor on, and the upper frequency limit is 100%. W1 is 0, Y1 is 1, Y2 is 0, and B is 0, and the corresponding operating mode state is air conditioner error-stop state; W1 is 1, Y1 is 1, Y2 is 1, and B is 0, and the corresponding operating mode state is air conditioner error-stop state; W1 is 1, Y1 is 0, Y2 is 1, and B is 0, and the corresponding operating mode state is air conditioner error-stop state. Among them, 0 indicates that the voltage of terminal pair C is 0V, and 1 indicates that the voltage of terminal pair C is 24V.

[0056] It should be noted that the mode state in the signal combination mode conversion truth table may also be other cooling or heating working modes, which is not specifically limited here.

[0057] like Figure 2 As shown, when the air conditioner is in the cooling operation mode, the current first ambient temperature is obtained, the first ambient temperature is compared with the preset first ambient temperature range, the first setting level and its setting temperature of the air conditioner in the cooling operation mode are determined, and after a preset time period based on the first setting level and its setting temperature, the corresponding second ambient temperature is recorded, and when the difference between the second ambient temperature and the first ambient temperature is less than or equal to the preset first temperature threshold, the first setting level is lowered to the second setting level and its setting temperature. Specifically, Figure 4 As shown in the circle, during the startup process, when the frequency of the variable frequency compressor rises, it needs to stay at the 50HZ, 60HZ, and 70HZ points for 30 seconds respectively. However, when the reference target frequency is lower than one of the stay points, it only needs to stay at the previous stay point. In addition, when the air conditioner is in the heating operation 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 setting temperature of the air conditioner in the cooling operation mode. After running for a preset time period based on the third setting level and its setting temperature, the corresponding fourth ambient temperature is recorded. When 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 lowered to the fourth setting level and its setting temperature. In addition, when the target mode state is determined to be a single air supply mode state based on the temperature control signal and the preset signal combination mode conversion truth table, the fan motor is triggered to run. Specifically, as shown in FIG. Figure 5 As shown in the circle, during the startup process, when the frequency of the variable frequency compressor rises, it should stay at the 50HZ, 60HZ and 70HZ points for 30 seconds respectively, but when the reference target frequency is lower than one of the stay points, it only needs to stay at the previous stay point.

[0058] As shown in the following Tset table, when the air conditioner is in the cooling operation mode, the first ambient temperature may be Tai, and the first ambient temperature range may include Tai≤20℃, 20℃<Tai≤25℃, Tai>25℃. If the first setting level and its setting temperature may be Tset LEVEL=1 and Tset=Tai-1 respectively, correspondingly, the second setting level and its setting temperature may be Tset LEVEL=2 and Tset=Tai-2 respectively. If the first setting level and its setting temperature may be Tset LEVEL=2 and Tset=Tai-2 respectively, correspondingly, the second setting level and its setting temperature may be Tset LEVEL=3 and Tset=Tai-4 respectively, which are not specifically limited here. Among them, from Tset LEVEL=1 to Tset LEVEL=3, the cooling speed becomes faster.

[0059] like Figure 2 and 3 As shown, when the air conditioner is in the heating operation mode, the third ambient temperature may be Tai, and the second ambient temperature range may also include Tai≤20℃, 20℃<Tai≤25℃, Tai>25℃. If the third setting level and its setting temperature may be Tset LEVEL=1 and Tset=Tai-1 respectively, correspondingly, the fourth setting level and its setting temperature may be Tset LEVEL=2 and Tset=Tai-2 respectively. If the third setting level and its setting temperature may be Tset LEVEL=2 and Tset=Tai-2 respectively, correspondingly, the fourth setting level and its setting temperature may be Tset LEVEL=3 and Tset=Tai-4 respectively, which are not specifically limited here. Among them, from Tset LEVEL=1 to Tset LEVEL=3, the heating speed is accelerated.

[0060] Tset table

[0061]

[0062] Further, after recording the corresponding second ambient temperature, the operation of the compressor may be controlled based on the second setting level and its setting temperature when the difference between the second ambient temperature and the first ambient temperature is less than or equal to the preset first temperature threshold; and the operation of the compressor may be controlled based on the first setting level and its setting temperature when the difference between the second ambient temperature and the first ambient temperature is greater than the preset temperature threshold. In addition, after recording the corresponding fourth ambient temperature, the operation of the compressor may be controlled based on the fourth setting level and its setting temperature when the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold; and the operation of the compressor may be controlled based on the third setting level and its setting temperature when the difference between the fourth ambient temperature and the third ambient temperature is greater than the preset second temperature threshold.

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

[0064] Specifically, the operating frequency corresponding to the variable frequency compressor can be determined by matching selection based on the target mode state and the set temperature, the speed value of the variable frequency compressor can be determined based on the operating frequency, and then the signal of the speed value of the variable frequency compressor can be output to the corresponding inverter to control the variable frequency compressor to operate at the speed. Among them, the operating frequency and speed of the variable frequency compressor are proportional to each other. 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] In the process of setting the wind speed, the required wind speed gear is selected by operating the wind speed button on the air conditioner panel. After receiving the wind speed signal, the control circuit stores the corresponding wind speed gear value for subsequent control. In the process of power on / off control, the power on / off state can be selected by operating the power on / off button on the air conditioner panel. The power on / off signal is received by the control circuit and processed accordingly. In the process of mode signal control, the operation mode of the air conditioner can be selected, such as cooling mode, heating mode, air supply mode, etc. The mode signal is also received by the control circuit and processed accordingly. In the process of determining the compressor speed value, the control circuit can calculate the corresponding compressor speed based on the set wind speed, power on / off state and mode signal, ambient temperature Tset (internal ambient temperature, external ambient temperature), Pd (high pressure of the outdoor unit), PS (low pressure of the outdoor unit, compressor exhaust pressure and compressor suction pressure). The speed value can be calculated and adjusted according to the known speed curve and operating parameters. For the external ambient temperature, for example, 35 degrees requires a frequency of 40HZ and 40 degrees requires a frequency of 60HZ. In the process of controlling the compressor speed, the control circuit outputs the calculated compressor speed signal to the inverter to control the operation of the compressor. Since it is impossible to directly transmit the set temperature signal, this method indirectly controls the compressor speed by setting the ambient temperature, Pd, PS, wind speed, power on / off and mode. The present invention can control the operating state and compressor speed of the air-conditioning system by setting other parameters without a specific set temperature signal, so as to achieve the dual goals of energy saving and comfort. At present, it can only be done by setting the temperature signal to the air-conditioning control panel, which lacks flexibility. Figure 6 As shown, the variable frequency air conditioner compressor speed control method of the present invention overcomes the limitation of being unable to transmit a specific set temperature through a 24Vac ON / OFF signal, and improves the flexibility of the air conditioner variable frequency compressor control.

[0066] In addition, in the embodiment of the present invention, the air conditioner can also perform shutdown control: when the air conditioner is in cooling or heating operation, the variable frequency compressor receives a shutdown signal, and the current frequency of the variable frequency compressor is greater than 55Hz (EE), the variable frequency compressor can be directly shut down after reducing the frequency to 48Hz at 2Hz / s; when the current frequency of the variable frequency compressor is less than 55Hz, it will directly shut down after receiving the shutdown signal. This control method can prevent excessive stress caused by sudden shutdown of high-frequency operation. The shutdown frequency point is confirmed after considering the stress. After the variable frequency compressor stops, the fan executes the residual heat blowing control before shutting down.

[0067] The variable frequency compressor speed control method of the air conditioner provided by the present invention obtains the temperature control signal input by the thermostat to characterize the mode state of the air conditioner, and determines the target mode state of the air conditioner based on the temperature control signal and the preset signal combination mode conversion truth table, and determines the set temperature of the air conditioner in the target mode state, and then determines the speed of the variable frequency compressor based on the target mode state and the set temperature, and controls the operation of the variable frequency compressor based on the speed of the variable frequency compressor. This method can effectively improve the speed control efficiency of the variable frequency compressor, enhance the flexibility and adjustment performance of the air conditioner operation, and improve the user experience.

[0068] The variable frequency compressor speed control device for an air conditioner provided by the present invention is described below. The variable frequency compressor speed control device for an air conditioner described below and the variable frequency compressor speed control method for an air conditioner described above can be referred to each other.

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

[0070] A temperature control signal acquisition unit 701 is used to acquire a temperature control signal input by a thermostat and used to represent the mode state of the air conditioner;

[0071] The set temperature 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 determine the set temperature of the air conditioner in the target mode state; wherein the signal combination mode conversion truth table includes a plurality of corresponding groups of comparison relationships 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 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 mark of the compressor operation, a status mark of the four-way valve control, a status mark of the electric heating operation, and a status mark of the fan motor operation;

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

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

[0076] When the air conditioner is in a cooling operation mode, obtaining a current first ambient temperature, comparing the first ambient temperature with a preset first ambient temperature interval, determining a first setting level and a setting temperature of the air conditioner in the cooling operation mode, and recording a corresponding second ambient temperature after running for a preset time period based on the first setting level and the setting temperature, and when the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, adjusting the first setting level down to a second setting level and a setting temperature;

[0077] When the air conditioner is in the heating operation mode, the current third ambient temperature is obtained, the third ambient temperature is compared with the preset second ambient temperature range, the third setting level and the setting temperature of the air conditioner in the cooling operation mode are determined, and after running for a preset time period based on the third setting level and the setting temperature, the corresponding fourth ambient temperature is recorded, and when 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 lowered to the fourth setting level and the setting temperature.

[0078] Furthermore, after recording the corresponding second ambient temperature, the method further includes:

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

[0080] Furthermore, after recording the corresponding fourth ambient temperature, the method further includes:

[0081] When the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold, the operation of the compressor is controlled 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 operation of the compressor is controlled 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 corresponding to the variable frequency compressor is determined, and based on the operating frequency, the speed value of the variable frequency compressor is determined; wherein the operating frequency and the speed of the variable frequency compressor are in direct proportion;

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

[0085] Furthermore, after obtaining the temperature control signal input by the thermostat to characterize the mode state of the air conditioner, it also includes: triggering the operation of the fan motor when it is determined that the target mode state is 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 the air conditioner provided by the present invention obtains the temperature control signal input by the thermostat for characterizing the mode state of the air conditioner, and determines the target mode state of the air conditioner based on the temperature control signal and the preset signal combination mode conversion truth table, and determines the set temperature of the air conditioner in the target mode state, and then determines the speed of the variable frequency compressor based on the target mode state and the set temperature, and controls the operation of the variable frequency compressor based on the speed of the variable frequency compressor. This method can effectively improve the speed control efficiency of the variable frequency compressor, enhance the flexibility and adjustment performance of the air conditioner operation, and improve the user experience.

[0087] Figure 8 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 8 As shown, the electronic device may include: a processor 801, a communication interface 804, a memory 802 and a communication bus 803, wherein the processor 801, the communication interface 804 and the memory 802 communicate with each other through the communication bus 803. The processor 801 may call the logic instructions in the memory 802 to execute the variable frequency compressor speed control method of the air conditioner, the method comprising: obtaining a temperature control signal input by the thermostat for characterizing the mode state of the air conditioner; 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 under the target mode state; wherein the signal combination mode conversion truth table contains multiple groups of corresponding comparison relationships 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] In addition, the logic instructions in the above-mentioned memory 802 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0089] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the variable frequency compressor speed control method of the air conditioner provided by the above-mentioned methods, and the method includes: obtaining a temperature control signal input by a thermostat to characterize the mode state of the air conditioner; based on the temperature control signal and a preset signal combination mode conversion truth table, determining a target mode state of the air conditioner, and determining a set temperature of the air conditioner under the target mode state; wherein the signal combination mode conversion truth table contains multiple groups of corresponding comparison relationships between various signal combinations and various mode states of the air conditioner; based on the target mode state and the set temperature, determining the speed of the variable frequency compressor, and controlling the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

[0090] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the variable frequency compressor speed control method of the air conditioner provided above, the method comprising: obtaining a temperature control signal input by a thermostat for characterizing 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 under the target mode state; wherein the signal combination mode conversion truth table contains multiple groups of corresponding comparison relationships 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, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0092] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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 a variable frequency compressor of an air conditioner, characterized in that: include: Acquiring a temperature control signal input by a thermostat for representing a mode state of the air conditioner; Based on the temperature control signal and a preset signal combination mode conversion truth table, a target mode state of the air conditioner is determined, and a set temperature of the air conditioner under the target mode state is determined; wherein the signal combination mode conversion truth table includes a plurality of corresponding sets of comparison relationships between various signal combinations and various mode states of the air conditioner; Based on the target mode state and the set temperature, a rotation speed of the inverter compressor is determined, and the operation of the inverter compressor is controlled based on the rotation speed of the inverter compressor.

2. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that: The temperature control signal includes a status mark of the compressor operation, a status mark of the four-way valve control, a status mark of the electric heating operation, and a status mark of the fan motor operation; The step 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 match search is performed in the signal combination mode conversion truth table to obtain a target mode state corresponding to the temperature control signal; wherein the target mode state includes the operating wind speed of the air conditioner, the on / off state of the compressor in the air conditioner and / or the operating mode state of the air conditioner; and 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 2, characterized in that: The step of determining the set temperature of the air conditioner in the target mode state specifically includes: When the air conditioner is in a cooling operation mode, obtaining a current first ambient temperature, comparing the first ambient temperature with a preset first ambient temperature interval, determining a first setting level and a setting temperature of the air conditioner in the cooling operation mode, and recording a corresponding second ambient temperature after running for a preset time period based on the first setting level and the setting temperature, and when the difference between the second ambient temperature and the first ambient temperature is less than or equal to a preset first temperature threshold, adjusting the first setting level down to a second setting level and a setting temperature; When the air conditioner is in the heating operation mode, the current third ambient temperature is obtained, the third ambient temperature is compared with the preset second ambient temperature range, the third setting level and the setting temperature of the air conditioner in the cooling operation mode are determined, and after running for a preset time period based on the third setting level and the setting temperature, the corresponding fourth ambient temperature is recorded, and when 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 lowered to the fourth setting level and the setting temperature.

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

5. The variable frequency compressor speed control method for an air conditioner according to claim 3, characterized in that: After recording the corresponding fourth ambient temperature, it also includes: when the difference between the fourth ambient temperature and the third ambient temperature is less than or equal to the preset second temperature threshold, controlling the operation of the compressor 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, controlling the operation of the compressor based on the third setting level and its set temperature.

6. The variable frequency compressor speed control method for an air conditioner according to claim 1, characterized in that: The step of determining the rotation 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 corresponding to the variable frequency compressor is determined, and based on the operating frequency, the speed value of the variable frequency compressor is determined; wherein the operating frequency and the speed of the variable frequency compressor are in direct proportion; The controlling the operation of the variable frequency compressor based on the rotation speed of the variable frequency compressor specifically includes: outputting a signal of the rotation speed value of the variable frequency compressor to a corresponding inverter to control the operation of the variable frequency compressor at the rotation speed.

7. The variable frequency compressor speed control method for an air conditioner according to claim 3, characterized in that: After obtaining the temperature control signal input by the thermostat to characterize the mode state of the air conditioner, it also includes: triggering the operation of the fan motor when it is determined that the target mode state is a single air supply mode state based on the temperature control signal and a preset signal combination mode conversion truth table.

8. A variable frequency compressor speed control device for an air conditioner, characterized in that: include: A temperature control signal acquisition unit, used to acquire a temperature control signal input by a thermostat and used to characterize a mode state of the air conditioner; a set temperature determination unit, configured to determine a target mode state of the air conditioner based on the temperature control signal and a preset signal combination mode conversion truth table, and determine a set temperature of the air conditioner under the target mode state; wherein the signal combination mode conversion truth table includes a plurality of corresponding sets of comparison relationships between various signal combinations and various mode states of the air conditioner; 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 control the operation of the variable frequency compressor based on the speed of the variable frequency compressor.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the variable frequency compressor speed control method of the air conditioner as described in any one of claims 1 to 7 are implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the variable frequency compressor speed control method for an air conditioner as claimed in any one of claims 1 to 7 are implemented.

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