Starting system and starting method of compressor and air conditioner

Abstract

The starting system comprises a frequency conversion power supply module, a control module, an adjustable capacitor module and a power supply coil in the compressor, the power supply coil is arranged in the compressor, and the two ends of the power supply coil are connected with the two power supply ends of the compressor correspondingly; one end of the variable-frequency power supply module is connected with the power supply coil through a first power supply end of the compressor, the other end of the variable-frequency power supply module is connected with a first end of the adjustable capacitor module, a second end of the adjustable capacitor module is connected with the power supply coil through a second power supply end of the compressor, and a third end of the adjustable capacitor module is connected with the control module; the power supply coil is used for forming an LC resonance circuit with the adjustable capacitor module to heat the compressor; the controller is used for controlling the compressor to be started after the compressor is heated to the preset starting temperature. By means of the technical scheme, the technical problem that in the prior art, energy consumption of a compressor starting method is high is solved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor starting system and method, and an air conditioner. Background Art

[0002] During the startup process, compressors often face technical difficulties in cold starts, especially in low-temperature environments. The viscosity of the refrigeration oil is high, which can easily cause wear of the internal components of the compressor, thereby increasing the difficulty of starting and affecting the service life and performance of the compressor.

[0003] In the prior art, in order to improve the starting efficiency of the compressor, an external heating device (such as an electric heater) is usually used to preheat the compressor. However, these methods have problems such as high energy consumption and slow heating speed, and it is difficult to meet the requirements for rapid starting. Summary of the invention

[0004] The present application provides a compressor starting system and method, and an air conditioner, so as to at least solve the technical problem of high energy consumption in the compressor starting method in the prior art.

[0005] In a first aspect, the present application provides a compressor starting system, characterized in that the starting system comprises a variable frequency power supply module, a control module, an adjustable capacitor module, and a power supply coil inside the compressor, wherein two ends of the power supply coil are respectively connected to two power supply ends of the compressor;

[0006] One end of the variable frequency power supply module is connected to the power supply coil through the first power supply end of the compressor, the other end of the variable frequency power supply module is connected to the first end of the adjustable capacitor module, the second end of the adjustable capacitor module is connected to the power supply coil through the second power supply end of the compressor, and the third end of the adjustable capacitor module is connected to the control module;

[0007] The variable frequency power supply module is used to output an output voltage with a variable frequency; the power supply coil is used to form an LC resonant circuit with the adjustable capacitor module to heat the compressor; and the controller is used to control the compressor to start after the compressor is heated to a preset starting temperature.

[0008] In a feasible embodiment of the present application, the adjustable capacitor module includes a plurality of capacitors and a plurality of controllable switches, the number of the capacitors is the same as the number of the controllable switches, and the capacitance values ​​of the capacitors are different;

[0009] One end of the capacitor is connected to one end of the variable frequency power supply module as the first end of the adjustable capacitor module, the other end of the capacitor is connected to the first end of the controllable switch, the second end of the controllable switch is connected to the power supply coil as the second end of the adjustable capacitor module, and the third end of the controllable switch is connected to the control module as the third end of the adjustable capacitor module.

[0010] In a feasible embodiment of the present application, the control module includes:

[0011] A first acquisition unit, configured to acquire a model parameter of the compressor in response to the operation of the variable frequency power supply module;

[0012] A first generating unit, configured to generate a first control instruction according to the model parameter; wherein the first control instruction is used to control the initial switch state of each of the controllable switches, thereby controlling the initial capacitance value of the adjustable capacitor module;

[0013] The first sending unit is used to send the first control instruction to the adjustable capacitor module.

[0014] In a feasible embodiment of the present application, the control module further includes:

[0015] A second acquisition unit, configured to acquire operating parameters of the compressor; wherein the operating parameters at least include an internal temperature and an inductance value of the power supply coil;

[0016] a second generating unit, configured to generate a second control instruction according to the operating parameter in response to a change in the operating parameter; wherein the second control instruction is used to control the operating switch state of each of the controllable switches, thereby controlling the operating capacitance value of the adjustable capacitor module;

[0017] The second sending unit is used to send the second control instruction to the adjustable capacitor module.

[0018] In a feasible embodiment of the present application, the startup system further includes an offline identification module;

[0019] The offline identification module is connected to the compressor and the control module respectively; the offline identification module is used to obtain the model parameters of the compressor before the compressor is actually operated.

[0020] In a feasible embodiment of the present application, the startup system further includes an online identification module;

[0021] The online identification module is connected to the compressor and the control module respectively; the online identification module is used to obtain the working parameters of the compressor after the compressor is actually running.

[0022] In a second aspect, the present application provides a method for starting a compressor, the method being applied to a compressor starting system according to any one of the embodiments of the first aspect, the method comprising:

[0023] In response to the operation of the variable frequency power supply module, obtaining model parameters of the compressor;

[0024] Generate a first control instruction according to the model parameter; wherein the first control instruction is used to control the initial switch state of each controllable switch in the adjustable capacitor module, thereby controlling the initial capacitance value of the adjustable capacitor module;

[0025] The first control instruction is sent to the adjustable capacitor module, so that the adjustable capacitor module and the power supply coil of the compressor form an LC resonant circuit to heat the compressor.

[0026] In a feasible embodiment of the present application, generating a first control instruction according to the model parameter includes:

[0027] Calling a model parameter-resonance frequency mapping table; wherein the model parameter-resonance frequency mapping table stores a plurality of the model parameters and a plurality of heating resonant frequencies, and one model parameter corresponds to only one heating resonant frequency;

[0028] Determine the heating resonant frequency of the LC resonant circuit in the model parameter-resonant frequency mapping table;

[0029] Determining the initial capacitance value of the adjustable capacitor module according to the heating resonant frequency;

[0030] The first control instruction is generated according to the initial capacitance value.

[0031] In a feasible embodiment of the present application, after sending the first control instruction to the adjustable capacitor module, the method further includes:

[0032] Acquire the operating parameters of the compressor; wherein the operating parameters at least include the internal temperature of the compressor and the inductance value of the power supply coil;

[0033] In response to the change of the operating parameter, a second control instruction is generated according to the operating parameter; wherein the second control instruction is used to control the operating switch state of each of the controllable switches, thereby controlling the operating capacitance value of the adjustable capacitor module;

[0034] The second control instruction is sent to the adjustable capacitor module to control the operating capacitance value of the adjustable capacitor module, thereby controlling the actual resonant frequency of the LC resonant circuit to be the heating resonant frequency.

[0035] In a third aspect, the present application provides an air conditioner, comprising a compressor starting system as described in any one of the embodiments of the first aspect above and a compressor, wherein the compressor is connected to the compressor starting system.

[0036] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0037] In the technical solution provided by the present application, the adjustable capacitor module and the power supply coil inside the compressor form an LC resonant circuit, and the compressor can be directly preheated without the need to set up an external heating device for the compressor. At the same time, the LC resonant circuit has low energy consumption, and because the power supply coil is directly heated inside the compressor, the heating efficiency of the technical solution provided by the present application is high. The technical solution provided by the present application at least solves the technical problem of high energy consumption in the compressor starting method in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0040] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0041] Figure 1 A schematic structural diagram of a compressor starting system provided in an embodiment of the present application;

[0042] Figure 2 Another structural schematic diagram of a compressor starting system provided in an embodiment of the present application;

[0043] Figure 3 A schematic flow chart of a compressor startup method provided in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of another flow chart of a compressor starting method provided in an embodiment of the present application;

[0045] Figure 5 A schematic diagram of the structure of an air conditioner provided in an embodiment of the present application.

[0046] Explanation of the accompanying drawings: 1. variable frequency power supply module; 2. control module; 3. adjustable capacitor module; 31. capacitor; 32. controllable switch; 4. power supply coil; 5. offline identification module; 6. online identification module. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0048] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0049] In order to solve the technical problem of high energy consumption in the compressor starting method in the prior art, the present application provides a compressor starting system and starting method, and an air conditioner, which can reduce the energy consumption of heating the compressor when the compressor is started.

[0050] Figure 1 A schematic diagram of a compressor startup system provided in an embodiment of the present application, referring to Figure 1 A compressor starting system provided in an embodiment of the present application includes a variable frequency power supply module 1, a control module 2, an adjustable capacitor module 3, and a power supply coil 4 inside the compressor, wherein two ends of the power supply coil 4 are respectively connected to two power supply ends of the compressor;

[0051] One end of the variable frequency power supply module 1 is connected to the power supply coil 4 through the first power supply end of the compressor, the other end of the variable frequency power supply module 1 is connected to the first end of the adjustable capacitor module 3, the second end of the adjustable capacitor module 3 is connected to the power supply coil 4 through the second power supply end of the compressor, and the third end of the adjustable capacitor module 3 is connected to the control module 2;

[0052] The variable frequency power supply module 1 is used to output an output voltage with a variable frequency; the power supply coil 4 is used to form an LC resonant circuit with the adjustable capacitor module 3 to heat the compressor; and the controller is used to control the compressor to start after the compressor is heated to a preset starting temperature.

[0053] Specifically, the variable frequency power supply module 1 can be a variable frequency power supply, which can be a power supply with built-in frequency conversion function, or a power supply composed of a fixed frequency power supply and a frequency converter. The variable frequency power supply module 1 only needs to be able to achieve variable frequency of the output voltage, and will not be elaborated here.

[0054] There is a power supply coil 4 inside the compressor, which is essentially an inductor. The two ends of the power supply coil 4 are respectively connected to the two power supply ends of the compressor, and can be connected to external electrical equipment through the two power supply ends of the compressor.

[0055] The adjustable capacitor module 3 is controlled by the control module 2 by being connected to the control module 2 . Under the control instruction output by the control module 2 to the adjustable capacitor module 3 , the capacitance value of the adjustable capacitor module 3 can be changed.

[0056] Based on the connection method of a compressor starting system provided in the present application, it can be known that the power supply module, the adjustable capacitor module 3 and the power supply coil 4 actually constitute an LC resonant circuit. When the power supply module starts to supply power, an oscillation signal is formed in the LC resonant circuit, causing the power supply coil 4 to heat up, thereby heating the compressor.

[0057] In a feasible embodiment of the present application, in order to realize the function of adjusting the capacitance value of the adjustable capacitor module 3, the adjustable capacitor module 3 includes a plurality of capacitors 31 and a plurality of controllable switches 32, the number of the capacitors 31 is the same as the number of the controllable switches 32, and the capacitance values ​​of the capacitors 31 are different;

[0058] One end of the capacitor 31 is connected to one end of the variable frequency power supply module 1 as the first end of the adjustable capacitor module 3, the other end of the capacitor 31 is connected to the first end of the controllable switch 32, the second end of the controllable switch 32 is connected to the power supply coil 4 as the second end of the adjustable capacitor module 3, and the third end of the controllable switch 32 is connected to the control module 2 as the third end of the adjustable capacitor module 3.

[0059] Specifically, Figure 2 Another structural schematic diagram of a compressor starting system provided in an embodiment of the present application, referring to Figure 2 The adjustable capacitor module 3 specifically includes a plurality of capacitors 31 and a plurality of controllable switches 32, wherein the capacitance values ​​of the capacitors 31 are different.

[0060] A capacitor 31 and a controllable switch 32 are connected in series to form a path, one end of multiple paths is connected to one end of the variable frequency power supply module 1, the other end of multiple paths is connected to the power supply coil 4, and the third end of each controllable switch 32 is connected to the control module 2.

[0061] The switching state of the controllable switch 32 can be controlled by the control module 2. When the control module 2 controls any controllable switch 32 to be closed, the path where the controllable switch 32 is located is connected. At this time, the currently connected path-the variable frequency power supply module 1-the power supply coil 4 forms an LC resonant circuit, and the capacitance value of the capacitor 31 in the currently connected path is the capacitance value of the adjustable capacitor module 3.

[0062] When the control module 2 controls different controllable switches 32 to close, since the capacitors 31 on the paths where different controllable switches 32 are located are different, the controller can determine which capacitor 31 is effective by controlling the switching state of the controllable switch 32, thereby realizing control of the capacitance value of the adjustable capacitor module 3.

[0063] In the technical solution provided by the present application, the adjustable capacitor module 3 and the power supply coil 4 inside the compressor form an LC resonant circuit, and the compressor can be directly preheated without the need to set up an external heating device for the compressor. At the same time, the LC resonant circuit has low energy consumption, and because the power supply coil 4 is directly heated inside the compressor, the heating efficiency of the technical solution provided by the present application is high. The technical solution provided by the present application at least solves the technical problem of high energy consumption of the compressor starting method in the prior art.

[0064] In order to realize the control of the LC resonant circuit composed of the adjustable capacitor module 3, the power supply coil 4 and the variable frequency power supply module 1, so that the LC resonant circuit works at a more suitable resonant frequency, in a feasible embodiment of the present application, the compressor starting system also includes an offline identification module 5 and an online identification module 6, specifically referring to Figure 2 , the connection mode of the offline identification module 5 and the online identification module 6 with other devices in the system is as follows:

[0065] The offline identification module 5 is connected to the compressor and the control module 2 respectively; the offline identification module 5 is used to obtain the model parameters of the compressor before the compressor is actually operated.

[0066] The online identification module 6 is connected to the compressor and the control module 2 respectively; the online identification module 6 is used to obtain the working parameters of the compressor after the compressor is actually running.

[0067] By setting up an offline identification module 5 and an online identification module 6 in the system, the model parameters and operating parameters of the compressor can be monitored, and the control module 2 can adaptively adjust the LC resonant circuit based on the model parameters and operating parameters.

[0068] In a feasible embodiment of the present application, the control module 2 includes:

[0069] A first acquisition unit, used for acquiring model parameters of the compressor in response to the operation of the variable frequency power supply module 1;

[0070] A first generating unit, used to generate a first control instruction according to the model parameter; wherein the first control instruction is used to control the initial switch state of each controllable switch 32, thereby controlling the initial capacitance value of the adjustable capacitor module 3;

[0071] The first sending unit is used to send a first control instruction to the adjustable capacitor module 3 .

[0072] Specifically, after the variable frequency power supply module 1 starts to operate and supply power, the control module 2 obtains the model parameters of the compressor from the offline identification module 5, and the model parameters are used to describe the actual model of the compressor.

[0073] It is understandable that different actual models of the compressor affect the actual parameters of the internal electrical components of the compressor, such as internal resistance, internal capacitance, etc. The offline identification module 5 measures the internal electrical components of the compressor through a preset offline identification algorithm. When the variable frequency power supply module 1 starts to supply power, the offline identification module 5 sends the actual parameters of the internal electrical components of the compressor to the control module 2. The control module 2 determines the model parameters of the compressor based on the corresponding relationship between the actual parameters of the internal electrical components of the compressor and the model parameters of the compressor.

[0074] The LC resonant circuit can be matched with compressors of different models by changing the resonant frequency, thereby achieving a better heating effect. For compressors with different actual model parameters, the control module 2 generates a corresponding first control instruction according to the model parameters of the compressor, and the initial switch state of each controllable switch 32 can be controlled through the first control instruction, and the adjustable capacitor module 3 is set to different initial capacitance values.

[0075] After determining the initial capacitance value corresponding to the compressor, the control module 2 sends the generated first control instruction to the adjustable capacitor module 3, and the LC resonant circuit heats the compressor at a preferred resonant frequency.

[0076] In a feasible embodiment of the present application, the control module 2 further includes:

[0077] A second acquisition unit is used to acquire the operating parameters of the compressor; wherein the operating parameters at least include the internal temperature and the inductance value of the power supply coil 4;

[0078] A second generating unit, for generating a second control instruction according to the operating parameter in response to a change in the operating parameter; wherein the second control instruction is used to control the operating switch state of each controllable switch 32, thereby controlling the operating capacitance value of the adjustable capacitor module 3;

[0079] The second sending unit is used to send a second control instruction to the adjustable capacitor module 3.

[0080] Specifically, since the LC resonant circuit continuously heats the compressor, the working state of the compressor will change to a certain extent. In order to ensure that the LC resonant circuit has a good heating effect, we hope to maintain the resonant frequency of the LC resonant circuit at the preferred resonant frequency initially determined.

[0081] When the compressor starts to actually operate, the online identification module 6 starts to work, and the online identification module continuously collects the working parameters of the compressor, and the working parameters at least include the internal temperature of the compressor and the inductance value of the power supply coil 4 of the compressor.

[0082] The control module 2 obtains the operating parameters of the compressor from the online identification module 6, and controls the capacitance value of the adjustable capacitor module 3 when the operating parameters change, so that the resonant frequency of the LC resonant circuit can be maintained at the preferred resonant frequency determined at the beginning.

[0083] Figure 3 A flowchart of a compressor startup method provided in an embodiment of the present application is provided. A compressor startup method provided in an embodiment of the present application is applied to the compressor startup system described in any one of the above system embodiments, which can be specifically implemented in the control module 2 of the compressor startup system, referring to Figure 3 A compressor starting method provided in an embodiment of the present application specifically includes the following steps:

[0084] S31: in response to the operation of the variable frequency power supply module 1, obtaining model parameters of the compressor;

[0085] S32: Generate a first control instruction according to the model parameter; wherein the first control instruction is used to control the initial switch state of each controllable switch 32 in the adjustable capacitor module 3, thereby controlling the initial capacitance value of the adjustable capacitor module 3;

[0086] S33: Sending a first control instruction to the adjustable capacitor module 3, so that the adjustable capacitor module 3 and the power supply coil 4 of the compressor form an LC resonant circuit to heat the compressor.

[0087] Specifically, when the variable frequency power supply module 1 starts to supply power, the control module 2 obtains the model parameters of the compressor from the offline identification module 5 connected to the compressor, and the model parameters are used to describe the actual model of the compressor.

[0088] It is understandable that different actual models of the compressor affect the actual parameters of the internal electrical components of the compressor, such as internal resistance, internal capacitance, etc. The offline identification module 5 measures the internal electrical components of the compressor through a preset offline identification algorithm. When the variable frequency power supply module 1 starts to supply power, the offline identification module 5 sends the actual parameters of the internal electrical components of the compressor to the control module 2. The control module 2 determines the model parameters of the compressor based on the corresponding relationship between the actual parameters of the internal electrical components of the compressor and the model parameters of the compressor.

[0089] After determining the model parameters of the compressor, the control module 2 generates a first control instruction according to the model parameters. In a feasible embodiment of the present application, generating the first control instruction according to the model parameters includes:

[0090] Calling a model parameter-resonance frequency mapping table; wherein the model parameter-resonance frequency mapping table stores a plurality of model parameters and a plurality of heating resonant frequencies, and one model parameter corresponds to only one heating resonant frequency;

[0091] Determine the heating resonant frequency of the LC resonant circuit in the model parameter-resonant frequency mapping table;

[0092] Determining the initial capacitance value of the adjustable capacitor module 3 according to the heating resonant frequency;

[0093] A first control instruction is generated according to the initial capacitance value.

[0094] Specifically, a model parameter-resonance frequency mapping table is preset inside the control module 2, and the model parameter-resonance frequency mapping table stores multiple model parameters and multiple heating resonant frequencies. One model parameter corresponds to only one heating resonant frequency. The model parameter-resonance frequency mapping table can be actually calibrated and measured by technicians.

[0095] After the control module 2 obtains the model parameters of the compressor from the offline identification module 5, it searches the model parameter-resonance frequency mapping table to determine the heating resonant frequency corresponding to the current model parameters. The determined heating resonant frequency is the resonant frequency that best matches the current compressor.

[0096] After determining the heating resonant frequency, the control module 2 determines the initial capacitance value of the adjustable capacitor module 3 according to the heating resonant frequency. Based on the resonant frequency calculation formula of the LC resonant circuit, it can be known that F=1 / 2πlc (F is the resonant frequency of the LC resonant circuit; l is the inductance value of the LC resonant circuit, that is, the inductance value of the power supply coil 4; c is the capacitance value of the LC resonant circuit, that is, the capacitance value of the adjustable capacitor module 3). When the heating resonant frequency and the inductance value of the power supply coil 4 are known, the control module 2 determines the initial capacitance value of the adjustable capacitor module 3.

[0097] After determining the initial capacitance value of the adjustable capacitor module 3, the control module 2 generates a corresponding first control instruction and sends the first control instruction to the adjustable capacitor module. In a feasible embodiment of the present application, the first control instruction can be a plurality of level signals of different levels. Since the control module 2 is connected to each controllable switch 32 in the adjustable capacitor module 3, level signals of different levels can be sent to different controllable switches 32, and the capacitance value of the adjustable capacitor module 3 connected to the LC resonant circuit is controlled by controlling the switch state of the controllable switch 32.

[0098] Through the compressor startup method described in the above embodiment, when the variable frequency power supply module 1 supplies power to the compressor, the control module 2 obtains the model parameters of the compressor read by the offline identification module 5, and the control module 2 identifies the heating resonant frequency required by the current compressor based on the model parameters, generates a corresponding first control instruction based on the heating resonant frequency, controls the controllable switch 32 in the adjustable capacitor module 3, and adjusts the capacitance value of the adjustable capacitor module 3 to the desired initial capacitor 31. The adjustable capacitor module 3 and the power supply coil 4 inside the compressor form an LC resonant circuit to start heating the compressor.

[0099] However, during the heating process of the compressor, the working state of the compressor will change. Due to the rapid change in the internal temperature of the compressor, the inductance value of the power supply coil 4 will change, which will cause the current LC resonant circuit to be unable to maintain the predetermined heating resonant frequency, affecting the starting speed of the compressor.

[0100] Figure 4 Another schematic diagram of a compressor startup method provided in an embodiment of the present application is shown in FIG. Figure 4 In order to prevent the change of the working state of the compressor from affecting the starting effect of the compressor, in a feasible embodiment of the present application, after the compressor starts running, the capacitance value of the adjustable capacitor module 3 is adjusted in real time based on the working parameters of the compressor. In this embodiment, after sending the first control instruction to the adjustable capacitor module 3, the method further includes:

[0101] S41: Acquire the working parameters of the compressor; wherein the working parameters at least include the internal temperature of the compressor and the inductance value of the power supply coil 4;

[0102] S42: In response to the change of the operating parameter, generate a second control instruction according to the operating parameter; wherein the second control instruction is used to control the operating switch state of each controllable switch 32, thereby controlling the operating capacitance value of the adjustable capacitor module 3;

[0103] S43: Sending a second control instruction to the adjustable capacitor module 3 to control the operating capacitance value of the adjustable capacitor module 3, thereby controlling the actual resonant frequency of the LC resonant circuit to be the heating resonant frequency.

[0104] When the compressor starts to actually operate, the online identification module 6 starts to work, and the online identification module continuously collects the working parameters of the compressor, and the working parameters at least include the internal temperature of the compressor and the inductance value of the power supply coil 4 of the compressor.

[0105] The control module 2 obtains the operating parameters of the compressor from the online identification module 6, and controls the capacitance value of the adjustable capacitor module 3 when the operating parameters change, so that the resonant frequency of the LC resonant circuit can be maintained at the heating resonant frequency determined at the beginning.

[0106] In a feasible embodiment of the present application, the control module 2 can calculate the real-time resonant frequency of the LC resonant circuit based on the current capacitance value of the adjustable capacitor module 3 and the inductance value of the power supply coil 4, compare the real-time resonant frequency with the heating resonant frequency, and generate a second control instruction to adjust the capacitance value of the adjustable capacitor module 3 when the difference between the two is greater than the set difference threshold.

[0107] By using the compressor starting method described in the above embodiment, the LC resonant circuit is monitored and adjusted in real time, so that the LC resonant circuit is affected as little as possible by changes in the compressor working state during the starting process, thereby effectively optimizing the starting efficiency and ensuring overall stability.

[0108] Figure 5 A schematic diagram of the structure of an air conditioner provided in an embodiment of the present application, referring to Figure 5 The air conditioner at least includes a compressor starting system and a compressor as described in any one of the above system embodiments, and the compressor starting system is connected to the compressor.

[0109] 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 shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0111] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A compressor starting system, characterized in that: The starting system includes a variable frequency power supply module, a control module, an adjustable capacitor module and a power supply coil inside the compressor, and the two ends of the power supply coil are respectively connected to the two power supply ends of the compressor; One end of the variable frequency power supply module is connected to the power supply coil through the first power supply end of the compressor, the other end of the variable frequency power supply module is connected to the first end of the adjustable capacitor module, the second end of the adjustable capacitor module is connected to the power supply coil through the second power supply end of the compressor, and the third end of the adjustable capacitor module is connected to the control module; The variable frequency power supply module is used to output an output voltage with a variable frequency; the power supply coil is used to form an LC resonant circuit with the adjustable capacitor module to heat the compressor; and the controller is used to control the compressor to start after the compressor is heated to a preset starting temperature.

2. The starting system according to claim 1, characterized in that: The adjustable capacitor module includes a plurality of capacitors and a plurality of controllable switches, the number of the capacitors is the same as the number of the controllable switches, and the capacitance values ​​of the capacitors are different; One end of the capacitor is connected to one end of the variable frequency power supply module as the first end of the adjustable capacitor module, the other end of the capacitor is connected to the first end of the controllable switch, the second end of the controllable switch is connected to the power supply coil as the second end of the adjustable capacitor module, and the third end of the controllable switch is connected to the control module as the third end of the adjustable capacitor module.

3. The starting system according to claim 2, characterized in that: The control module comprises: A first acquisition unit, configured to acquire a model parameter of the compressor in response to the operation of the variable frequency power supply module; A first generating unit, configured to generate a first control instruction according to the model parameter; wherein the first control instruction is used to control the initial switch state of each of the controllable switches, thereby controlling the initial capacitance value of the adjustable capacitor module; The first sending unit is used to send the first control instruction to the adjustable capacitor module.

4. The starting system according to claim 2, characterized in that: The control module also includes: A second acquisition unit, configured to acquire operating parameters of the compressor; wherein the operating parameters at least include an internal temperature and an inductance value of the power supply coil; a second generating unit, configured to generate a second control instruction according to the operating parameter in response to a change in the operating parameter; wherein the second control instruction is used to control the operating switch state of each of the controllable switches, thereby controlling the operating capacitance value of the adjustable capacitor module; The second sending unit is used to send the second control instruction to the adjustable capacitor module.

5. The starting system according to claim 3, characterized in that: The startup system also includes an offline identification module; The offline identification module is connected to the compressor and the control module respectively; the offline identification module is used to obtain the model parameters of the compressor before the compressor is actually operated.

6. The starting system according to claim 4, characterized in that: The startup system also includes an online identification module; The online identification module is connected to the compressor and the control module respectively; the online identification module is used to obtain the working parameters of the compressor after the compressor is actually running.

7. A method for starting a compressor, characterized in that: The starting method is applied to a starting system of a compressor as described in any one of claims 1 to 6 above, and the method comprises: In response to the operation of the variable frequency power supply module, obtaining model parameters of the compressor; Generate a first control instruction according to the model parameter; wherein the first control instruction is used to control the initial switch state of each controllable switch in the adjustable capacitor module, thereby controlling the initial capacitance value of the adjustable capacitor module; The first control instruction is sent to the adjustable capacitor module, so that the adjustable capacitor module and the power supply coil of the compressor form an LC resonant circuit to heat the compressor.

8. The startup method according to claim 7, characterized in that: Generating a first control instruction according to the model parameter includes: Calling a model parameter-resonance frequency mapping table; wherein the model parameter-resonance frequency mapping table stores a plurality of the model parameters and a plurality of heating resonant frequencies, and one model parameter corresponds to only one heating resonant frequency; Determine the heating resonant frequency of the LC resonant circuit in the model parameter-resonant frequency mapping table; Determining the initial capacitance value of the adjustable capacitor module according to the heating resonant frequency; The first control instruction is generated according to the initial capacitance value.

9. The startup method according to claim 8, characterized in that: After sending the first control instruction to the adjustable capacitor module, the method further includes: Acquire the operating parameters of the compressor; wherein the operating parameters at least include the internal temperature of the compressor and the inductance value of the power supply coil; In response to the change of the operating parameter, a second control instruction is generated according to the operating parameter; wherein the second control instruction is used to control the operating switch state of each of the controllable switches, thereby controlling the operating capacitance value of the adjustable capacitor module; The second control instruction is sent to the adjustable capacitor module to control the operating capacitance value of the adjustable capacitor module, thereby controlling the actual resonant frequency of the LC resonant circuit to be the heating resonant frequency.

10. An air conditioner, characterized in that: The air conditioner comprises a compressor starting system as claimed in any one of claims 1 to 6 and a compressor, and the compressor is connected to the compressor starting system.

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