Compressor control methods, circuits, air conditioners, and storage media

Abstract

This invention discloses a compressor control method, circuit, air conditioner, and storage medium. The compressor control method includes: setting the current of each current axis according to a pre-stored initial line current to obtain the corresponding current line voltage based on the current of each current axis; obtaining the current line resistance value based on the current line voltage and the current of each current axis, and determining the current temperature based on the current line resistance value and the relationship formula between temperature and line resistance; obtaining the target temperature, and adjusting the current of each current axis according to the deviation between the target temperature and the current temperature to adjust the heating power of the line resistance and stabilize the compressor temperature to the target temperature. The technical solution of this invention aims to adaptively preheat for different compressors and their operating currents, thereby enabling the air conditioner compressor to start smoothly at low temperatures.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a compressor control method, circuit, air conditioner, and storage medium. Background Technology

[0002] Currently, there are two ways to solve the problem of air conditioner compressors easily starting abnormally at low temperatures. One is to use an external electric heating element to heat the compressor, but this method requires adding an electric heating element and a control relay, which increases the cost significantly, and the electric heating element requires a large amount of power to heat up quickly in a short time. The other is to heat the compressor's own windings. However, existing winding heating cannot control the temperature for different compressors and their operating currents, and additional cooling is required through a fan. Summary of the Invention

[0003] The main objective of this invention is to provide a compressor control method, circuit, air conditioner, and storage medium, which aims to adaptively preheat for different compressors and their operating currents, thereby enabling the air conditioner compressor to start smoothly at low temperatures.

[0004] To achieve the above objectives, the present invention proposes a compressor control method, wherein the compressor is provided with multiple current shafts, and the multiple power lines of the compressor have line resistance. The control method includes:

[0005] The current of each current axis is set according to the pre-stored initial line current, so as to obtain the corresponding current line voltage according to the current of each current axis;

[0006] The current line resistance value is obtained based on the current line voltage and the current of each current axis, and the current temperature is determined based on the current line resistance value and the formula relating temperature to the line resistance.

[0007] The target temperature is obtained, and the current of each current axis is adjusted according to the deviation between the target temperature and the current temperature to regulate the heating power of the line resistance and stabilize the temperature of the compressor to the target temperature.

[0008] In some embodiments, adjusting the quadrature current based on the deviation between a pre-stored target temperature and the current temperature includes:

[0009] The temperature deviation value is obtained by subtracting the target temperature from the current temperature;

[0010] The line current is fed back based on the temperature deviation value to obtain the target line current corresponding to the temperature deviation value.

[0011] The target current of the quadrature axis is determined based on the target line current, and the current of the quadrature axis is fed back based on the target current.

[0012] In some embodiments, after performing feedback processing on the line current based on the temperature deviation value to obtain the target line current corresponding to the deviation, the method further includes:

[0013] The target line current is limited according to the pre-stored current limit range to control the heating power of the line resistor within the preset temperature range.

[0014] In some embodiments, the current limiting process for the target line current based on a pre-stored current limiting range includes:

[0015] Match the target line current with a pre-stored current limit range;

[0016] When the target line current is greater than the current limit range, the maximum critical value of the current limit range is updated to the target line current output.

[0017] When the target line current is less than the current limit range, the minimum threshold value of the current limit range is updated to the target line current output.

[0018] When the target line current is within the current limit range, the target line current is directly output.

[0019] In some embodiments, the current axis includes a quadrature axis, and the step of determining the target current of the quadrature axis based on the target line current and performing feedback processing on the current of the quadrature axis based on the target current specifically includes:

[0020] The target line current is used as the target current of the quadrature axis, and the current of the quadrature axis is fed back based on the target current.

[0021] In some embodiments, the current axis includes a quadrature axis and a direct axis, and setting the current of each current axis according to the initial line current specifically includes:

[0022] Set the current value of the quadrature axis to the initial line current value, and set the current value of the direct axis to zero.

[0023] The present invention also proposes a control circuit for a compressor, comprising:

[0024] A feedback control loop is used to connect to the motor and perform feedback processing on the motor's line current;

[0025] The controller is electrically connected to the feedback control loop;

[0026] The controller is configured to set the current of each current axis according to a pre-stored initial line current, so as to obtain the corresponding current line voltage according to the current of each current axis; obtain the current line resistance value according to the current line voltage and the initial line current, and determine the current temperature according to the relationship formula between the current line resistance value and the temperature; and,

[0027] The target temperature is obtained, and the feedback control loop is controlled to adjust the quadrature current according to the deviation between the target temperature and the current temperature, so as to adjust the current temperature corresponding to the current line resistance value to the target temperature.

[0028] In some embodiments, the control circuit further includes:

[0029] An interactive component, electrically connected to the controller, is used to output a corresponding target temperature to the controller based on the received interactive signal.

[0030] The present invention also proposes an air conditioner, which includes a compressor and a control circuit for the compressor.

[0031] The present invention also proposes a storage medium including the above-described compressor control method.

[0032] This invention addresses the issue of compressor preheating by setting a pre-stored initial line current. Based on the feedback of actual currents across each current axis, the current and line voltage values ​​are obtained, leading to the calculation of the current line resistance value using Ohm's law. Therefore, this invention can determine the current temperature based on the current line resistance value and the relationship between temperature and line resistance. Furthermore, this invention accepts an externally input target temperature and adjusts the currents across each current axis according to the deviation between the target temperature and the current temperature. This regulates the heating power of the line resistance, stabilizing the compressor temperature to the target temperature. This solves the problem of current compressors not being able to adaptively preheat based on their specific conditions and operating currents. The invention allows for real-time adjustment of the compressor's preheating temperature via resistance feedback, controlling the heating power of the line resistance and enabling stable startup of different compressors at low temperatures. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating an embodiment of the compressor control method of the present invention;

[0035] Figure 2 This is a flowchart illustrating an embodiment of step S300 in the present invention;

[0036] Figure 3 This is a flowchart illustrating an embodiment of step S340 in the present invention;

[0037] Figure 4 This is a schematic diagram of the control circuit of the compressor of the present invention according to one embodiment;

[0038] Figure 5 This is a schematic diagram of another embodiment of the control circuit of the compressor of the present invention;

[0039] Figure 6 This is a schematic diagram of the feedback of each current axis in the feedback control loop of the present invention;

[0040] Figure 7 This is a schematic diagram of the temperature feedback in the feedback control loop of the present invention.

[0041] Explanation of icon numbers:

[0042] label name label name 410 Feedback control loop 420 Interactive components 420 controller RT Current line resistance value

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] This invention proposes a control method for compressors, which is applied to compressors.

[0047] It should be noted that a compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. It is commonly used in temperature-regulating equipment such as air conditioners. A compressor typically includes a motor, inlet duct, and outlet duct. Controlling a compressor usually refers to controlling the motor within the compressor. Figure 4 As shown, an air conditioner typically has a feedback control loop 410 for PID control of the compressor motor, and a controller 420 for outputting target parameters to the feedback control loop 410. The target parameters can be set parameters such as target speed and target temperature T_ref, depending on the actual application.

[0048] Reference Figure 1 In one embodiment, the compressor is provided with multiple current shafts, and there is a line resistance between every two phase input terminals of the compressor. The compressor control method includes:

[0049] S100. Set the current of each current axis according to the pre-stored initial line current is, so as to obtain the corresponding current line voltage Us according to the current of each current axis.

[0050] In this embodiment, the initial line current is is is determined by the R&D personnel during production based on the intermediate value of the preheating current of commonly available compressors. In other embodiments, it can also be set to other values ​​according to the actual situation.

[0051] like Figure 6 As shown, in order to obtain good control characteristics, a rotating coordinate system is usually established on the motor rotor. This coordinate system rotates synchronously with the rotor. The direction of the rotor magnetic field is taken as the direct axis, and the direction perpendicular to the rotor magnetic field is taken as the quadrature axis. Thus, when controlling the AC motor, the controller 420 inputs the pre-stored initial current into the feedback control loop 410 of the compressor. Through the feedback control loop 410, the line current used to input the compressor is decoupled from the quadrature axis and the direct axis, so as to perform PARK transformation on the quadrature axis current iq and the direct axis current id respectively, thereby obtaining the corresponding quadrature axis voltage Uq and the direct axis voltage Ud, and obtaining the corresponding line voltage based on the quadrature axis voltage Uq and the direct axis voltage Ud.

[0052] S200. Obtain the current line resistance value RT based on the current line voltage Us and the initial line current is, and determine the current temperature T based on the relationship between the current line resistance value RT and the temperature and the current of each of the current axes.

[0053] It should be noted that when the compressor is connected to a three-phase power supply, the number of power lines can be three or four, depending on the power source. When the compressor is powered on and current flows through the power lines, there will be line resistance between the power lines. According to the characteristics of resistance, the greater the resistance, the stronger the heating capacity, thus a linear formula between resistance and temperature can be obtained. The current temperature T is determined based on the obtained line resistance value. In this embodiment, the current of the current axis is set by setting an initial line current is. Since the feedback control loop 410 does not directly output the initial line current is, but rather there is a gradual approximation process, when calculating the actual line current, it is necessary to calculate the current line current based on the actual output current of each current axis. Then, based on the line current and the current line voltage Us obtained from the current transformation of each current axis, the line resistance of the three-phase power supply input to the motor can be calculated, thereby obtaining the current temperature T of the compressor at the beginning of preheating.

[0054] Furthermore, the relationship between the current line resistance value RT and the temperature and the current of each of the current axes is given by the formula R. T =R0(1+(T-T0)), where R T R0 is the current line resistance value RT, T is the line resistance value at the reference temperature, T is the current temperature T, and T0 is the reference temperature.

[0055] S300. Obtain the target temperature T_ref, and adjust the current of each current axis according to the deviation between the target temperature T_ref and the current temperature T, so as to adjust the heating power of the line resistance and stabilize the temperature of the compressor to the target temperature T_ref.

[0056] In this embodiment, the target temperature T_ref is the rated preheating temperature of the compressor to which the control method is applied, which can be set by the user through interactive components 430 such as touch screen, button panel, and remote control.

[0057] It should be noted that, in order to better control the motor, a rotating coordinate system is usually established on the motor rotor. This coordinate system rotates synchronously with the rotor. The direction of the rotor magnetic field is taken as the direct axis, and the direction perpendicular to the rotor magnetic field is taken as the quadrature axis. In this way, the initial line current is is decoupled from the direct axis at the quadrature axis. By feedback control of the quadrature axis current iq and the direct axis current id respectively, the heating power of the line resistance is changed.

[0058] During compressor preheating, the line current corresponding to the currents of each current axis is converted and input to the compressor. This causes the compressor's line resistance to heat up under the action of the line current. The controller 420 calculates the resistance value of the line resistance and obtains the current temperature T under the current environment, thus enabling it to... Figure 7As shown, the preset target temperature T_ref is subtracted from the current temperature T to obtain the corresponding deviation. This deviation is then input into the feedback control loop 410, causing the loop to adjust the current of each current axis based on the acquired deviation. This ensures that the corresponding line current after conversion can also be adjusted according to the deviation value. It should be noted that the deviation between the target temperature T_ref and the current temperature T is positively correlated with the line current. A larger deviation indicates a lower current temperature T and a greater distance from the target temperature T_ref. Therefore, the controller 420 adjusts the deviation between the target temperature T_ref and the current temperature T... After the temperature T deviation is input into the feedback control loop 410, the feedback control loop 410 will increase the current of each current axis to increase the converted line voltage, thereby increasing the heating power of the resistor. The smaller the deviation, the higher the current temperature T. When the deviation is negative, it means that the current temperature T is higher than the target temperature T_ref. Therefore, after the controller 420 inputs the deviation between the target temperature T_ref and the current temperature T into the feedback control loop 410, the feedback control loop 410 will decrease the current of each current axis to decrease the converted line voltage, thereby reducing the heating power of the resistor and lowering the preheating temperature of the compressor.

[0059] The technical solution of this invention sets a pre-stored initial line current is, causing the compressor to start preheating first. Then, based on the actual currents of each current axis fed back, the current line current and current line voltage Us are obtained, and subsequently, the current line resistance value R can be obtained according to Ohm's law. T Therefore, the present invention can determine the current line resistance value R based on the current line resistance value R. T The current temperature T is determined by the formula relating temperature to the resistance of the line resistor. Furthermore, this application can accept an externally input target temperature T_ref, thereby adjusting the current of each current axis based on the deviation between the target temperature T_ref and the current temperature T, regulating the heating power of the line resistor, and stabilizing the compressor temperature to the target temperature T_ref. This solves the problem that current compressors cannot adaptively preheat according to the actual conditions and operating current of different compressors during preheating. It enables the compressor's preheating temperature to be adjusted in real time via resistance feedback to regulate the current of the current axis, thereby controlling the heating power of the line resistor and achieving stable startup of different compressors at low temperatures.

[0060] Reference Figures 1 to 2 In one embodiment, adjusting the quadrature-axis current based on the deviation between the pre-stored target temperature T_ref and the current temperature T includes:

[0061] S310. Subtract the target temperature T_ref from the current temperature T to obtain the temperature deviation value;

[0062] S320. Feedback processing is performed on the line current based on the temperature deviation value to obtain the target line current is_ref corresponding to the temperature deviation value;

[0063] S330. Determine the target current of each current axis based on the target line current is_ref, and perform feedback processing on the current of each current axis based on the target current.

[0064] In this embodiment, the controller 420 obtains the corresponding current line resistance value R based on the acquired current of each current axis and its corresponding current line voltage Us. T The system can calculate the current temperature T based on the formula relating line resistance to temperature. It can then calculate the temperature deviation by subtracting the target temperature T_ref from the current temperature T, and input this deviation into the feedback control loop 410. When adjusting various parameters of the input motor (such as current and voltage), the feedback control loop 410 uses PID control. Therefore, based on the positive correlation between the temperature deviation and the line current, the feedback loop can obtain the target line current is_ref corresponding to the temperature deviation. Thus, when the target line current is_ref increases based on the temperature deviation, the feedback control loop 410 increases the current in each current axis; conversely, when the target line current is_ref decreases based on the temperature deviation, the feedback control loop 410 decreases the current in each current axis.

[0065] Reference Figures 2 to 7 In one embodiment, after performing feedback processing on the line current based on the temperature deviation value to obtain the target line current is_ref corresponding to the deviation, the method further includes:

[0066] S340. The target line current is_ref is limited according to the pre-stored current limit range so as to control the heating power of the line resistor within the preset temperature range.

[0067] It should be noted that in practical applications, since the compressor also houses a controller 420 or other heat-sensitive functional loads, if the compressor's preheating temperature reaches a high temperature, such as 70 or 75 degrees Celsius, the controller 420 may burn out, causing the compressor to malfunction during operation. Therefore, in this embodiment, the preset temperature range is the normal operating temperature range of the controller 420, such as -40 to 65 degrees Celsius. Since the compressor preheats by adjusting the heating power of the resistor, thereby adjusting the compressor's preheating temperature, this embodiment also includes a corresponding current limit in the feedback control loop 410. When the current limiting circuit obtains the target line current is_ref, it limits the excessive target line current is_ref to control the heating power of the line resistor within the preset temperature range.

[0068] Reference Figures 1 to 3 In one embodiment, the current limiting process for the target line current is_ref based on a pre-stored current limit range includes:

[0069] S341. Match the target line current is_ref with the pre-stored current limit range;

[0070] S342. When the target line current is_ref is greater than the current limit range, update the maximum critical value of the current limit range to the target line current is_ref and output it.

[0071] S343. When the target line current is_ref is less than the current limit range, update the minimum critical value of the current limit range to the target line current is_ref output.

[0072] S344. When the target line current is_ref is within the current limit range, the target line current is_ref is directly output.

[0073] In this embodiment, when the current limiting circuit receives the target line current is_ref adjusted according to the temperature deviation value, it compares the target line current is_ref with the current limiting range. If the target line current is_ref is greater than the current limiting range, it indicates that the target line current is_ref may cause excessive heating power of the resistor, causing the compressor to run out of control at high temperatures. Therefore, the current limiting circuit outputs the maximum critical value of the current limiting range as the updated target line current is_ref. If the target line current is_ref is less than the current limiting range, it indicates that the target line current is_ref may cause insufficient heating power of the resistor, causing the compressor temperature to be lower than the preset temperature range. Therefore, the current limiting circuit outputs the minimum critical value of the current limiting range as the updated target line current is_ref. If the target line current is_ref is within the current limiting range, it indicates that the heating power of the line resistor under the target line current is_ref is sufficient to keep the compressor within the preset temperature range. Therefore, the current limiting circuit directly outputs the target line current is_ref.

[0074] Reference Figure 2 and Figure 6 In one embodiment, the current axis includes a cross axis, and the step of determining the target current of each current axis based on the target line current is_ref, and performing feedback processing on the current of each current axis based on the target current specifically includes:

[0075] S331. The target line current is_ref is used as the target current of the quadrature axis, and the current of the quadrature axis is fed back according to the target current.

[0076] It should be noted that during the preheating of the motor, the motor is not in normal operating condition; its rotor is stopped rotating, meaning the rotation angle of its rotational coordinate system is constant. Therefore, the line current input to the compressor at this time is the quadrature-axis current. Thus, in this embodiment, the controller 420, based on the obtained current line resistance value R... T After calculating the current temperature T, the difference between the target temperature T_ref and the current temperature T is calculated to obtain the temperature deviation value, which is then input into the quadrature-axis loop of the feedback control loop 410. When performing PID control on the quadrature-axis current, the quadrature-axis loop of the feedback control loop 410 obtains the target quadrature-axis current corresponding to the temperature deviation value based on the positive correlation between the temperature deviation value and the quadrature-axis current. Therefore, when the quadrature-axis current obtained from the temperature deviation value increases, the quadrature-axis loop of the feedback control loop 410 will increase the quadrature-axis output current; conversely, when the quadrature-axis current obtained from the temperature deviation value decreases, the quadrature-axis loop of the feedback control loop 410 will decrease the quadrature-axis output current.

[0077] Reference Figure 1 and Figure 6 In one embodiment, the current axis includes a quadrature axis and a direct axis, and setting the current of each current axis according to the initial line current is specifically includes:

[0078] S110. Set the current value of the quadrature axis to the current value of the initial line current is, and set the current value of the direct axis to zero.

[0079] It should be noted that during the preheating of the motor, the motor is not in normal working condition; its rotor is stopped rotating, meaning the rotation angle of its rotational coordinate system is a constant. This rotational coordinate system consists of a quadrature axis and a direct axis. The quadrature axis is used to control the motor's magnetic field, and the direct axis is used to control the motor's torque. When the rotor is stopped rotating, the torque is zero, meaning the preset line current is is entirely used as the quadrature axis current input. Therefore, in this embodiment, when the motor adjusts the current based on the deviation between the set target temperature T_ref and the current temperature T, it only needs to perform PID control on the quadrature axis through the feedback control loop 410.

[0080] Reference Figures 1 to 4 In one embodiment, the present invention also provides a control circuit for a compressor, comprising:

[0081] Feedback control loop 410 is used to connect to the motor and perform feedback processing on the line current of the motor;

[0082] Controller 420 is electrically connected to the feedback control loop 410;

[0083] The controller 420 is configured to set the current of each current axis according to a pre-stored initial line current is, so as to obtain the corresponding current line voltage Us according to the current of each current axis; obtain the current line resistance value RT according to the current line voltage Us and the initial line current is, and determine the current temperature T according to the current line resistance value RT and the formula relating temperature and line resistance value; and,

[0084] The target temperature T_ref is obtained, and the feedback control loop 410 is controlled to adjust the quadrature current according to the deviation between the target temperature T_ref and the current temperature T, so as to adjust the current temperature T corresponding to the current line resistance value RT to the target temperature T_ref.

[0085] In this embodiment, as Figure 6As shown, during compressor preheating, controller 420 inputs the pre-stored initial current into the feedback control loop 410 controlling the compressor. The feedback control loop 410 decouples the line current input to the compressor from the quadrature axis to the direct axis, using the quadrature axis current iq and the direct axis current id as PARK transformations to obtain the corresponding quadrature axis voltage Uq and direct axis voltage Ud. Based on these voltages, the current line voltage Us is obtained. When calculating the actual line current, the current line current is calculated based on the actual output currents of each current axis. Then, based on the line current and the current line voltage Us obtained from the current transformations of each current axis, the line resistance of the three-phase power supply input to the motor is calculated, thus obtaining the current temperature T when the initial line current is is input.

[0086] Specifically, the line currents corresponding to the converted currents of each current axis are input to the compressor, causing the compressor's line resistance to heat up under the action of the line current. The controller 420 calculates the resistance value of the line resistance, obtains the current temperature T under the current environment, and calculates the difference between the preset target temperature T_ref and the current temperature T to obtain the corresponding temperature deviation value. This temperature deviation value is then input to the feedback control loop 410, which adjusts the current of each current axis according to the obtained temperature deviation value, so that the corresponding line currents after conversion can also be adjusted according to the temperature deviation value. It should be noted that the temperature deviation value is positively correlated with the line current. The larger the value, the lower the current temperature T and the farther away it is from the target temperature T_ref. Therefore, after the controller 420 inputs the temperature deviation value into the feedback control loop 410, the feedback control loop 410 will increase the current of each current axis to increase the converted line voltage, thereby increasing the heating power of the resistor. The smaller the temperature deviation value, the higher the current temperature T. When the temperature deviation value is negative, it means that the current temperature T is higher than the target temperature T_ref. Therefore, after the controller 420 inputs the temperature deviation value into the feedback control loop 410, the feedback control loop 410 will decrease the current of each current axis to decrease the converted line voltage, thereby reducing the heating power of the resistor and lowering the preheating temperature of the compressor.

[0087] Reference Figures 1 to 5 In one embodiment, the control circuit further includes:

[0088] The interaction component 430 is electrically connected to the controller 420. The interaction component 430 is used to output the corresponding target temperature T_ref to the controller 420 according to the received interaction signal.

[0089] In this embodiment, the interactive component 430 can be a touch screen, a button panel, a remote control, etc.

[0090] Taking the touchscreen as an example, the explanation is similar for other interactive devices:

[0091] When preheating the compressor, the user touches the touch screen to output a corresponding trigger signal, causing the touch screen to output a corresponding numerical information value to the controller 420 according to the trigger signal. After receiving the numerical information, the controller 420 uses the corresponding value as the temperature value of the target temperature T_ref, and then calculates the temperature deviation value between the target temperature T_ref and the current temperature T.

[0092] The present invention also proposes an air conditioner, which includes a compressor and a control circuit for the compressor as described above. The specific structure of the control circuit for the compressor is as described in the above embodiments. Since the air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0093] The present invention also proposes a storage medium, which includes the above-described compressor control method. The specific structure of the compressor control method is as described in the above embodiments. Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0094] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control method for a compressor, wherein the compressor is provided with multiple current shafts, and the multiple power lines of the compressor have line resistance, characterized in that, The control method includes: The current of each current axis is set according to the pre-stored initial line current, so as to obtain the corresponding current line voltage according to the current of each current axis; The current line resistance value is obtained based on the current line voltage and the current of each current axis, and the current temperature is determined based on the current line resistance value and the formula relating temperature to the line resistance. The target temperature is obtained, and the current of each current axis is adjusted according to the deviation between the target temperature and the current temperature to regulate the heating power of the line resistance and stabilize the temperature of the compressor to the target temperature. The step of adjusting the current of each current axis based on the deviation between the target temperature and the current temperature includes: subtracting the target temperature from the current temperature to obtain a temperature deviation value; performing feedback processing on the line current based on the temperature deviation value to obtain a target line current corresponding to the temperature deviation value; determining the target current of each current axis based on the target line current, and performing feedback processing on the current of each current axis based on the target current. The step of processing the line current based on the temperature deviation value to obtain the target line current corresponding to the deviation further includes: performing current limiting processing on the target line current according to a pre-stored current limit range to control the heating power of the line resistor within a preset temperature range. The current limiting process for the target line current based on the pre-stored current limit range includes: matching the target line current with the pre-stored current limit range; when the target line current is greater than the current limit range, updating the maximum threshold value of the current limit range to the target line current output; when the target line current is less than the current limit range, updating the minimum threshold value of the current limit range to the target line current output; and when the target line current is within the current limit range, directly outputting the target line current.

2. The compressor control method as described in claim 1, characterized in that, The current axis includes a cross axis. The process of determining the target current for each current axis based on the target line current and performing feedback processing on the current of each current axis based on the target current specifically includes: The target line current is used as the target current of the quadrature axis, and the current of the quadrature axis is fed back based on the target current.

3. The compressor control method as described in claim 1, characterized in that, The current axes include a quadrature axis and a direct axis. Setting the current of each current axis based on the pre-stored initial line current specifically includes: Set the current value of the quadrature axis to the initial line current value, and set the current value of the direct axis to zero.

4. A control circuit for a compressor, wherein the compressor is provided with multiple current shafts, and the multiple power lines of the compressor have line resistance, characterized in that, include: A feedback control loop is used to connect to the motor and to provide feedback processing for the line current of the compressor; The controller is electrically connected to the feedback control loop; The controller is used to set the current of each current axis according to the pre-stored initial line current, so as to obtain the corresponding current line voltage according to the current of each current axis. The current line resistance value is obtained based on the current line voltage and the current of each current axis, and the current temperature is determined based on the current line resistance value and the formula relating temperature to the line resistance. as well as, The target temperature is obtained, and the feedback control loop is controlled to adjust the current of each current axis according to the deviation between the target temperature and the current temperature, so as to adjust the heating power of the line resistance and stabilize the temperature of the compressor to the target temperature. The step of adjusting the current of each current axis based on the deviation between the target temperature and the current temperature includes: subtracting the target temperature from the current temperature to obtain a temperature deviation value; performing feedback processing on the line current based on the temperature deviation value to obtain a target line current corresponding to the temperature deviation value; determining the target current of each current axis based on the target line current, and performing feedback processing on the current of each current axis based on the target current. The step of processing the line current based on the temperature deviation value to obtain the target line current corresponding to the deviation further includes: performing current limiting processing on the target line current according to a pre-stored current limit range to control the heating power of the line resistor within a preset temperature range. The current limiting process for the target line current based on the pre-stored current limit range includes: matching the target line current with the pre-stored current limit range; when the target line current is greater than the current limit range, updating the maximum threshold value of the current limit range to the target line current output; when the target line current is less than the current limit range, updating the minimum threshold value of the current limit range to the target line current output; and when the target line current is within the current limit range, directly outputting the target line current.

5. The control circuit of the compressor as described in claim 4, characterized in that, The control circuit also includes: An interactive component, electrically connected to the controller, is used to output a corresponding target temperature to the controller based on the received interactive signal.

6. An air conditioner, characterized in that, The air conditioner includes a compressor and a control circuit for the compressor as described in any one of claims 4-5.

7. A storage medium, characterized in that, This includes the compressor control method as described in any one of claims 1-3.

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