Operation control method and device of air conditioner and computer readable storage medium

Abstract

The invention discloses an operation control method and device of an air conditioner and a computer readable storage medium, the air conditioner comprises a PFC circuit and a load module powered by the PFC circuit, the load module comprises a compressor, and the method comprises the steps that preset switching power and the environment temperature are obtained, the preset switching power is critical power required to be switched to high-frequency switch control by the PFC circuit; the preset switching power and the environment temperature are matched with a preset corresponding relation, and the compressor switching frequency, needing to be switched to high-frequency switch control, of the PFC circuit is obtained; and controlling the operation mode of the PFC circuit according to the compressor switching frequency. According to the control method, the compressor switching frequency is obtained according to the environment temperature, the operation mode of the PFC circuit is controlled according to the compressor switching frequency, the real-time performance and accuracy of PFC circuit control can be improved, and therefore efficient and energy-saving control is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning control, and in particular to an operation control method, a control device and a computer-readable storage medium of an air conditioner. Background Art

[0002] When the PFC circuit of the air conditioner is running, if the high-frequency switch control is turned on directly, the high switching frequency of the power tube will cause greater circuit losses. However, since the PFC circuit is equipped with an inductor, it does not need to turn on the high-frequency switch control when the input power is not large. The use of synchronous rectification control can meet the harmonic control requirements. Therefore, the switching point between synchronous rectification control and high-frequency switch control is also very critical.

[0003] At present, the control methods used by air conditioners basically switch the PFC control mode by judging the size of the input current. However, before the high-frequency switch control is turned on, the input current is a narrow peak current. There is often a large delay in sampling and calculating the corresponding current value through AD. Direct application of the sampled value is prone to large deviations due to the input current characteristics. Therefore, switching the PFC control mode by judging the size of the input current not only increases the complexity of the control configuration, but also fails to take into account the real-time and accuracy of the control, and cannot achieve efficient and energy-saving control. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an operation control method, a control device and a computer-readable storage medium for an air conditioner, which can improve the real-time and accuracy of PFC circuit control, thereby achieving efficient and energy-saving control.

[0005] In a first aspect, an embodiment of the present invention provides an operation control method of an air conditioner, wherein the air conditioner comprises a PFC circuit and a load module powered by the PFC circuit, wherein the load module comprises a compressor, and the method comprises:

[0006] Acquire a preset switching power and an ambient temperature, wherein the preset switching power is a critical power at which the PFC circuit needs to switch to high-frequency switch control;

[0007] Matching the preset switching power and the ambient temperature with a preset corresponding relationship to obtain a compressor switching frequency at which the PFC circuit needs to switch to high-frequency switch control;

[0008] An operation mode of the PFC circuit is controlled according to the compressor switching frequency.

[0009] The operation control method of the air conditioner provided by the embodiment of the present invention has at least the following beneficial effects: by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0010] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the ambient temperature includes the outdoor temperature, the preset correspondence includes a first correspondence between the matching parameters of the preset switching power and the outdoor temperature, and the matching result is the compressor switching frequency; when the air conditioner operates in the cooling mode, the preset switching power and the outdoor temperature are matched with the first correspondence.

[0011] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the ambient temperature includes the indoor temperature, the preset correspondence includes a second correspondence whose matching parameters are the preset switching power and the indoor temperature, and the matching result is the compressor switching frequency; when the air conditioner operates in the heating mode, the preset switching power and the indoor temperature are matched with the second correspondence.

[0012] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the preset corresponding relationship is any one of the following: a parameter comparison table; a function formula; a corresponding relationship curve diagram.

[0013] According to some embodiments of the present invention, the operation control method of the air conditioner provided by the present invention, the operation mode of the PFC circuit is controlled according to the compressor switching frequency, including:

[0014] Acquire the real-time rotation speed of the compressor and convert it into the real-time frequency of the compressor;

[0015] The operation mode of the PFC circuit is controlled according to the real-time frequency and the compressor switching frequency.

[0016] According to some embodiments of the present invention, the operation control method of the air conditioner provided by the present invention, the operation mode of the PFC circuit is controlled according to the real-time frequency and the compressor switching frequency, including:

[0017] When the real-time frequency is greater than the compressor switching frequency, the PFC circuit is controlled to operate in the high-frequency switch control; when the real-time frequency is less than the compressor switching frequency, the PFC circuit is controlled to operate in the synchronous rectification control.

[0018] According to some embodiments of the present invention, the operation control method of the air conditioner provided by the present invention, the operation mode of the PFC circuit is controlled according to the compressor switching frequency, including:

[0019] converting the compressor switching frequency into a compressor switching speed;

[0020] Obtaining the real-time rotation speed of the compressor;

[0021] The operation mode of the PFC circuit is controlled according to the real-time rotation speed and the compressor switching rotation speed.

[0022] According to some embodiments of the present invention, the operation control method of the air conditioner provided by the present invention, the operation mode of the PFC circuit is controlled according to the real-time speed and the compressor switching speed, including:

[0023] When the real-time speed is greater than the compressor switching speed, the PFC circuit is controlled to operate in the high-frequency switch control; when the real-time speed is less than the compressor switching speed, the PFC circuit is controlled to operate in the synchronous rectification control.

[0024] According to the operation control method of the air conditioner provided by some embodiments of the present invention, the preset switching power is set according to the size of the inductance in the PFC circuit.

[0025] In a second aspect, an embodiment of the present invention provides an operation control device, comprising 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 operation control method of the air conditioner as described in the embodiment of the first aspect above.

[0026] The operation control device provided by the embodiment of the present invention has at least the following beneficial effects: by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0027] In a third aspect, an embodiment of the present invention provides an air conditioner, comprising the operation control device as described in the embodiment of the second aspect above.

[0028] The air conditioner provided according to the embodiment of the present invention has at least the following beneficial effects: by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time performance and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0029] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the air conditioner operation control method as described in the embodiment of the first aspect above.

[0030] The computer-readable storage medium provided by the embodiment of the present invention has at least the following beneficial effects: by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0034] Figure 1 It is a circuit schematic diagram of a PFC circuit, a load module and an MCU module of an air conditioner provided in an embodiment of the present invention;

[0035] Figure 2 is a flow chart of an operation control method of an air conditioner provided by an embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the change of cooling power with outdoor temperature under experimental conditions;

[0037] Figure 4 This is a schematic diagram showing the variation of power with indoor temperature during heating under experimental conditions;

[0038] Figure 5 is a flow chart of an operation control method of an air conditioner provided by another embodiment of the present invention;

[0039] Figure 6 It is a structural schematic diagram of the operation control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0041] In the description of the embodiments of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, "above", "below", "within", etc. are understood to include the number itself, "at least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] It should be noted that the terms such as setting, installing, and connecting in the embodiments of the present invention should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or mutual communication; it can be directly connected or indirectly connected through an intermediate medium.

[0043] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] When the PFC circuit of the air conditioner is running, if the high-frequency switch control is directly turned on, the high switching frequency of the power tube will cause a large loss in the circuit. However, since the PFC circuit is equipped with an inductor, it is not necessary to turn on the high-frequency switch control when the input power is not large. The synchronous rectification control method can meet the harmonic control requirements. Therefore, the switching point between the synchronous rectification control and the high-frequency switch control is also very critical. At present, in the control method used by the air conditioner, the PFC control mode is basically switched by judging the size of the input current. However, before the high-frequency switch control is turned on, the input current is a narrow peak current. There is often a large delay when the AD is sampled and the corresponding current value is calculated. The direct application of the sampled value is prone to large deviations due to the input current characteristics. Therefore, switching the PFC control mode by judging the size of the input current not only increases the complexity of the control configuration, but also fails to take into account the real-time and accuracy of the control, and cannot achieve efficient and energy-saving control.

[0045] Based on this, the embodiment of the present invention provides an operation control method, a control device and a computer-readable storage medium for an air conditioner. By obtaining a preset switching power of a PFC circuit, and then matching the preset switching power and the ambient temperature with a preset corresponding relationship, a compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency. Compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution uses parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be achieved by detecting the real-time speed of the compressor and converting it into a real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration. In addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data. The control method adopts a method in which the compressor switching frequency is obtained according to the ambient temperature and the operation mode of the PFC circuit is controlled according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0046] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0047] Reference Figure 1 , Figure 1It is a circuit schematic diagram of the PFC circuit, load module and MCU module of the air conditioner provided in an embodiment of the present invention. The air conditioner includes a PFC circuit and a load module powered by the PFC circuit, and the load module includes a compressor. It can be seen that the PFC circuit includes an inductor L, a first bridge arm, a second bridge arm, and a capacitor C1. The first bridge arm includes a first switch tube Q1 and a second switch tube Q2 connected in series, and the second bridge arm includes a third switch tube Q3 and a fourth switch tube Q4 connected in series. One end of the AC power supply AC is connected to the connection point of the first switch tube Q1 and the second switch tube Q2 through the inductor L, and the other end of the AC power supply AC is connected to the connection point of the third switch tube Q3 and the fourth switch tube Q4. The first switch tube Q1 and the third switch tube Q3 are connected to one end of the capacitor C1, and the second switch tube Q2 and the fourth switch tube Q4 are connected to the other end of the capacitor C1. In addition to the compressor, the load module can also include a fan, a switching power supply, etc. The air conditioner also includes an MCU module, which is respectively connected to the input end and the output end of the PFC circuit to respectively obtain the input voltage Vac, the input current Ipfc and the output voltage Vbus of the PFC circuit; the MCU module is also connected to the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 to control the on and off of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4; the MCU module is also connected to the compressor to obtain the rotation speed of the compressor; the MCU module is also connected to the outdoor temperature sensor and the indoor temperature sensor to obtain the outdoor temperature T1 and the indoor temperature T4.

[0048] The input voltage Vac and input current Ipfc sampling device provided by the AC power supply AC enter the MCU module, and the MCU module performs synchronous rectification control or high-frequency switching control on the PFC circuit. Among them, for the PFC circuit, synchronous rectification control means that the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 included in the current path through the capacitor C1 are controlled to be in the on state during at least a part of the period when the current flows through the bridge circuit, and the switch tube not in the current path is controlled to be in the off state; high-frequency switching control means that in each half cycle of the AC power supply AC, the first switch tube Q1 and the second switch tube Q2 are controlled to be turned on and off for a predetermined number of times.

[0049] Reference Figure 2 The first aspect of the present invention provides an operation control method of an air conditioner, the method includes but is not limited to steps S210 to S230:

[0050] Step S210: obtaining a preset switching power and an ambient temperature, wherein the preset switching power is a critical power at which the PFC circuit needs to switch to high-frequency switch control;

[0051] Step S220: matching the preset switching power and the ambient temperature with the preset corresponding relationship to obtain the compressor switching frequency that the PFC circuit needs to switch to the high-frequency switch control;

[0052] Step S230: controlling the operation mode of the PFC circuit according to the compressor switching frequency.

[0053] According to the operation control method of the air conditioner provided by the embodiment of the present invention, by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0054] In one embodiment, the preset switching power is set according to the size of the inductance in the PFC circuit. That is, the size of the inductance in the PFC circuit determines the critical power that needs to be switched to high-frequency switch control. Taking a certain model as an example, the corresponding compressor frequency is obtained through experiments at a specific power (that is, the value at which the PFC circuit needs to switch the control mode) and different outdoor temperatures T4 or indoor temperatures T1. The data is obtained as follows: Since the compressor frequency remains unchanged, when the air conditioner operates in the cooling mode, the outdoor unit power increases linearly with the outdoor temperature T4; when the air conditioner operates in the heating mode, the outdoor unit power increases linearly with the indoor temperature T1. Therefore, different compressor frequency points can be set, and when the air conditioner operates in the cooling mode at different outdoor temperatures, a power change curve with temperature can be obtained through experiments, for example, referring to Figure 3 As shown; and when the air conditioner is running in heating mode at different indoor temperatures, the power change curve with temperature is obtained through experiments, for example, referring to Figure 4 As shown in Figure 2, if the critical power of the prototype that needs to be switched to high-frequency switching control is 600kW, it can be obtained from Figure 3 Find the corresponding cooling temperature point in the curve or Figure 4The corresponding temperature point during heating can be found in the curve. Through the above experimental method, the air conditioner can obtain different compressor switching frequencies at different temperature values ​​according to the indoor temperature T1 or the outdoor temperature T4 under a specific power. And a parameter comparison table is made in the control software.

[0055] When the PFC circuit is working, the switching control of the operation mode of the PFC circuit is referred to Figure 5 As shown, the MCU module sets the preset switching power according to the requirements of the whole system of the air conditioner, that is, the critical power that the PFC circuit needs to switch to the high-frequency switch control, and then measures the indoor temperature T1 and the outdoor temperature T4. When the air conditioner operates in the heating mode, the indoor temperature T1 is matched with the parameter comparison table to obtain the compressor switching frequency corresponding to the indoor temperature T1; when the air conditioner operates in the cooling mode, the outdoor temperature T4 is matched with the parameter comparison table to obtain the compressor switching frequency corresponding to the outdoor temperature T4; finally, the operation mode of the PFC circuit is controlled according to the compressor switching frequency.

[0056] In the operation control method of the air conditioner provided in some embodiments of the present invention, the ambient temperature includes the outdoor temperature, the preset corresponding relationship includes a first corresponding relationship in which the matching parameters are the preset switching power and the outdoor temperature, and the matching result is the compressor switching frequency. When the air conditioner operates in the cooling mode, the preset switching power and the outdoor temperature are matched with the first corresponding relationship.

[0057] In this embodiment, since it can be concluded from experimental data that the outdoor temperature has an impact on the compressor switching frequency in the cooling mode, the matching parameters contained in the first corresponding relationship include the preset switching power and the outdoor temperature, so that the determination of the compressor switching frequency takes into account the impact of the outdoor temperature, thereby improving the accuracy of the compressor switching frequency.

[0058] In the operation control method of the air conditioner provided in some embodiments of the present invention, the ambient temperature includes the indoor temperature, the preset corresponding relationship includes a second corresponding relationship in which the matching parameters are the preset switching power and the indoor temperature, and the matching result is the compressor switching frequency. When the air conditioner operates in the heating mode, the preset switching power and the indoor temperature are matched with the second corresponding relationship.

[0059] In this embodiment, since it can be concluded from experimental data that the indoor temperature has an impact on the compressor switching frequency in the heating mode, the matching parameters contained in the second corresponding relationship include the preset switching power and the indoor temperature, so that the determination of the compressor switching frequency takes into account the impact of the indoor temperature, thereby improving the accuracy of the compressor switching frequency.

[0060] In the air conditioner operation control method provided by some embodiments of the present invention, the preset corresponding relationship is any one of the following: a parameter comparison table; a function formula; a corresponding relationship curve diagram.

[0061] It is understandable that there are many specific implementation forms of the preset corresponding relationship, and parameter comparison table, function formula or corresponding relationship curve diagram are all effective and feasible implementation methods.

[0062] In the operation control method of the air conditioner provided in some embodiments of the present invention, the operation mode of the PFC circuit is controlled according to the compressor switching frequency, including:

[0063] Obtain the real-time speed of the compressor and convert it into the real-time frequency of the compressor;

[0064] The operation mode of the PFC circuit is controlled according to the real-time frequency and the compressor switching frequency.

[0065] In this embodiment, the operation mode of the PFC circuit is controlled by acquiring the real-time rotation speed of the compressor, converting it into the real-time frequency of the compressor, and then comparing the real-time frequency with the switching frequency of the compressor.

[0066] In the operation control method of the air conditioner provided in some embodiments of the present invention, the operation mode of the PFC circuit is controlled according to the real-time frequency and the compressor switching frequency, including:

[0067] When the real-time frequency is greater than the compressor switching frequency, the PFC circuit is controlled to operate in high-frequency switching control; when the real-time frequency is less than the compressor switching frequency, the PFC circuit is controlled to operate in synchronous rectification control.

[0068] It can be understood that when the real-time frequency is greater than the compressor switching frequency, that is, a larger input power is required, and thus a high-frequency switching control mode is needed to control the operation of the PFC circuit; when the real-time frequency is less than the compressor switching frequency, that is, the required input power is not large, the use of synchronous rectification control can also meet the harmonic control requirements and reduce circuit losses.

[0069] In the operation control method of the air conditioner provided in some embodiments of the present invention, the operation mode of the PFC circuit is controlled according to the compressor switching frequency, including:

[0070] Converting the compressor switching frequency into the compressor switching speed;

[0071] Get the real-time speed of the compressor;

[0072] The operation mode of the PFC circuit is controlled according to the real-time speed and the compressor switching speed.

[0073] In this embodiment, the operation mode of the PFC circuit is controlled by converting the compressor switching frequency into the compressor switching speed, then acquiring the real-time speed of the compressor and comparing the real-time speed with the compressor switching speed.

[0074] In the operation control method of the air conditioner provided in some embodiments of the present invention, the operation mode of the PFC circuit is controlled according to the real-time speed and the compressor switching speed, including:

[0075] When the real speed is greater than the compressor switching speed, the PFC circuit is controlled to operate in high-frequency switching control; when the real speed is less than the compressor switching speed, the PFC circuit is controlled to operate in synchronous rectification control.

[0076] It can be understood that when the real-time speed is greater than the compressor switching speed, that is, a larger input power is required, and thus a high-frequency switching control mode is needed to control the operation of the PFC circuit; when the real-time speed is less than the compressor switching speed, that is, the required input power is not large, the use of synchronous rectification control can also meet the harmonic control requirements and reduce circuit losses.

[0077] Reference Figure 6 The second aspect of the present invention provides an operation control device 600, including a memory 610, a processor 620, and a computer program stored in the memory 610 and executable on the processor 620. The processor 620 executes the program to implement the operation control method of the air conditioner according to the first aspect of the present invention, for example, Figure 2 Steps S210 to S230 of the method or execution Figure 5 Flowchart of the method in .

[0078] According to the operation control device 600 provided by the embodiment of the present invention, by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, this solution uses the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be achieved by detecting the real-time speed of the compressor and converting it into a real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0079] In a third aspect, an embodiment of the present invention provides an air conditioner, comprising the operation control device 600 of the embodiment of the second aspect as described above.

[0080] According to the air conditioner provided by the embodiment of the present invention, by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0081] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the air conditioner operation control method of the first aspect embodiment, for example, to execute Figure 2 Steps S210 to S230 of the method or execution Figure 5 Flowchart of the method in .

[0082] According to the computer-readable storage medium provided by the embodiment of the present invention, by obtaining the preset switching power of the PFC circuit, and then matching the preset switching power and the ambient temperature with the preset corresponding relationship, the compressor switching frequency is obtained, so that the air conditioner can control the operation mode of the PFC circuit according to the compressor switching frequency; compared with the prior art in which the operation mode of the PFC circuit is switched by judging the magnitude of the input current, the present solution adopts the parameters on the load side for control, and there is no need to perform complex calculations on the sampled data. The switching judgment can be realized by detecting the real-time speed of the compressor and converting it into the real-time frequency or converting the compressor switching frequency into the compressor switching speed, and there is no need to increase the control configuration; in addition, the determination of the compressor switching frequency also takes into account the influence of the ambient temperature, and a reasonable preset corresponding relationship can be set according to data such as experimental data and historical operation data; the control method adopts the method of obtaining the compressor switching frequency according to the ambient temperature and controlling the operation mode of the PFC circuit according to the compressor switching frequency, which can improve the real-time and accuracy of the PFC circuit control, thereby achieving efficient and energy-saving control.

[0083] It will be appreciated by those skilled in the art that all or some of the steps and systems in the method disclosed above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium or a non-transitory medium and a communication medium or a temporary medium. As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0084] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An operation control method for an air conditioner, characterized in that: The air conditioner comprises a PFC circuit and a load module powered by the PFC circuit, the load module comprises a compressor, and the method comprises: Acquire a preset switching power and an ambient temperature, wherein the preset switching power is a critical power at which the PFC circuit needs to switch to high-frequency switch control; Matching the preset switching power and the ambient temperature with a preset corresponding relationship to obtain a compressor switching frequency at which the PFC circuit needs to switch to high-frequency switch control; An operation mode of the PFC circuit is controlled according to the compressor switching frequency.

2. The operation control method according to claim 1, characterized in that: The ambient temperature includes the outdoor temperature, and the preset corresponding relationship includes a first corresponding relationship in which the matching parameters are the preset switching power and the outdoor temperature, and the matching result is the compressor switching frequency. When the air conditioner operates in the cooling mode, the preset switching power and the outdoor temperature are matched with the first corresponding relationship.

3. The operation control method according to claim 1, characterized in that: The ambient temperature includes the indoor temperature, and the preset corresponding relationship includes a second corresponding relationship in which the matching parameters are the preset switching power and the indoor temperature and the matching result is the compressor switching frequency. When the air conditioner operates in the heating mode, the preset switching power and the indoor temperature are matched with the second corresponding relationship.

4. The operation control method according to any one of claims 1 to 3, characterized in that: The preset corresponding relationship is any one of the following: a parameter comparison table; a function formula; a corresponding relationship curve diagram.

5. The operation control method according to claim 1, characterized in that: The controlling the operation mode of the PFC circuit according to the compressor switching frequency includes: Acquire the real-time rotation speed of the compressor and convert it into the real-time frequency of the compressor; The operation mode of the PFC circuit is controlled according to the real-time frequency and the compressor switching frequency.

6. The operation control method according to claim 5, characterized in that: The controlling the operation mode of the PFC circuit according to the real-time frequency and the compressor switching frequency includes: When the real-time frequency is greater than the compressor switching frequency, the PFC circuit is controlled to operate in the high-frequency switch control; when the real-time frequency is less than the compressor switching frequency, the PFC circuit is controlled to operate in the synchronous rectification control.

7. The operation control method according to claim 1, characterized in that: The controlling the operation mode of the PFC circuit according to the compressor switching frequency includes: converting the compressor switching frequency into a compressor switching speed; Obtaining the real-time rotation speed of the compressor; The operation mode of the PFC circuit is controlled according to the real-time rotation speed and the compressor switching rotation speed.

8. The operation control method according to claim 7, characterized in that: The controlling the operation mode of the PFC circuit according to the real-time speed and the compressor switching speed includes: When the real-time speed is greater than the compressor switching speed, the PFC circuit is controlled to operate in the high-frequency switch control; when the real-time speed is less than the compressor switching speed, the PFC circuit is controlled to operate in the synchronous rectification control.

9. The operation control method according to claim 1, characterized in that: The preset switching power is set according to the inductance of the PFC circuit.

10. An operation control device, characterized in that: The invention comprises 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 operation control method of the air conditioner as claimed in any one of claims 1 to 4.

11. An air conditioner, characterized in that: Includes the operation control device as claimed in claim 11.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the operation control method of the air conditioner according to any one of claims 1 to 9.

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