Driving control method and device of single-cylinder high-speed rotor compressor, air conditioner and medium

Abstract

The invention discloses a driving control method and device for a single-cylinder high-speed rotor compressor, an air conditioner and a medium, and the method comprises the steps that when a compressor rotating speed frequency interval switching instruction is received, motor winding scheme information of a current rotating speed frequency interval and a target rotating speed frequency interval is obtained; and on the basis of the motor winding scheme information, double motors of the compressor are subjected to opposite operation control according to the same rotating speed change rate. The low-frequency operation stability and low-frequency energy efficiency of the compressor are improved, and the high-frequency operation frequency range of the compressor is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a drive control method and device for a single-cylinder high-speed rotor compressor, an air conditioner and a medium. Background Art

[0002] Due to the significant cost competitive advantage brought by the miniaturization of traditional single-cylinder variable-frequency rotor compressors, single-cylinder high-speed rotor compressors have become a research hotspot for domestic and foreign manufacturers.

[0003] Since the speed operating range of traditional single-cylinder high-speed rotor compressors is relatively wide, in order to achieve the high-frequency operation capability of the compressor, the existing solutions include the motor body design adopting a low back electromotive force solution, a low pole logarithm solution, and a small moment of inertia solution. These solutions cause the problem of reduced control stability when the compressor is driven at a low frequency and heavy load due to the decrease in operating electrical frequency, or the compressor speed fluctuation becomes larger, thereby causing the problem of reduced control stability when the compressor is driven at a low frequency and heavy load. These solutions all lead to the problem of reduced low-frequency energy efficiency of the compressor. There are also some existing solutions that require the addition of a low-frequency torque compensation control algorithm when the compressor is driven at a low frequency and heavy load, but this will also cause the problem of reduced low-frequency energy efficiency of the compressor. Therefore, there is an urgent need for a drive control method for a single-cylinder high-speed rotor compressor to improve the low-frequency operation stability and low-frequency energy efficiency of the compressor and broaden the high-frequency operating frequency range of the compressor. Summary of the invention

[0004] The embodiments of the present invention provide a drive control method, device, air conditioner and medium for a single-cylinder high-speed rotor compressor to improve the low-frequency operation stability and low-frequency energy efficiency of the compressor and broaden the high-frequency operation frequency range of the compressor.

[0005] In a first aspect, an embodiment of the present invention provides a drive control method for a single-cylinder high-speed rotor compressor, comprising:

[0006] When receiving a compressor speed frequency interval switching instruction, obtaining motor winding scheme information of a current speed frequency interval and a target speed frequency interval;

[0007] Based on the motor winding scheme information, the dual motors of the compressor are controlled to operate in opposite directions at the same speed change rate.

[0008] In a second aspect, an embodiment of the present invention provides a drive control device for a single-cylinder high-speed rotor compressor, comprising:

[0009] A speed frequency interval switching unit, for obtaining motor winding scheme information of a current speed frequency interval and a target speed frequency interval when receiving a compressor speed frequency interval switching instruction;

[0010] The motor winding operation unit is used to control the dual motors of the compressor to operate in opposite directions at the same speed change rate based on the motor winding scheme information.

[0011] In a third aspect, an embodiment of the present invention provides an air conditioner, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the drive control method for the single-cylinder high-speed rotor compressor described in the first aspect is implemented.

[0012] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor executes the drive control method for the single-cylinder high-speed rotor compressor described in the first aspect above.

[0013] The embodiment of the present invention provides a driving control method, device, air conditioner and medium for a single-cylinder high-speed rotor compressor, the method comprising: when receiving a compressor speed frequency interval switching instruction, obtaining the motor winding scheme information of the current speed frequency interval and the target speed frequency interval; based on the motor winding scheme information, the dual motors of the compressor are controlled to operate in opposite directions at the same speed change rate. The embodiment of the present invention controls the dual motors of the compressor to operate in opposite directions at the same speed change rate when the compressor needs to switch the speed frequency interval, thereby realizing the switching of the frequency and the control of the winding scheme of the dual motors of the compressor, which is beneficial to improving the low-frequency operation stability and low-frequency energy efficiency of the compressor and widening the high-frequency operation frequency range of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0015] Figure 1 A schematic flow chart of a driving control method for a single-cylinder high-speed rotor compressor provided by an embodiment of the present invention;

[0016] Figure 2 A schematic flow chart of a driving control method for a single-cylinder high-speed rotor compressor provided by another embodiment of the present invention;

[0017] Figure 3 A schematic diagram of a first sub-process of a driving control method for a single-cylinder high-speed rotor compressor provided by an embodiment of the present invention;

[0018] Figure 4A schematic diagram of a second sub-process of the drive control method for a single-cylinder high-speed rotor compressor provided in an embodiment of the present invention;

[0019] Figure 5 A schematic diagram of a third sub-process of the drive control method for a single-cylinder high-speed rotor compressor provided by an embodiment of the present invention;

[0020] Figure 6 A schematic diagram of a fourth sub-process of the drive control method for a single-cylinder high-speed rotor compressor provided by an embodiment of the present invention;

[0021] Figure 7 A schematic diagram of a fifth sub-process of the drive control method for a single-cylinder high-speed rotor compressor provided by an embodiment of the present invention;

[0022] Figure 8 A schematic block diagram of a drive control device for a single-cylinder high-speed rotor compressor provided by an embodiment of the present invention;

[0023] Fig. 9 A schematic block diagram of an air conditioner provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0026] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] See also Figure 1 , Figure 1A schematic flow chart of a driving control method for a single-cylinder high-speed rotor compressor provided in an embodiment of the present invention. The driving control method for a single-cylinder high-speed rotor compressor provided in an embodiment of the present invention is applied to air conditioners.

[0029] S1. When a compressor speed frequency interval switching instruction is received, motor winding scheme information of a current speed frequency interval and a target speed frequency interval is obtained.

[0030] Specifically, when a compressor speed frequency interval switching instruction is received, that is, the compressor needs to switch from the current speed frequency interval to another speed frequency interval, the motor winding scheme information of the current speed frequency interval and the target speed frequency interval is obtained from the pre-constructed winding scheme table.

[0031] Among them, the motor winding scheme information includes the target maximum speed, target winding scheme and target motor corresponding to the target speed frequency interval, and also includes the current maximum speed, current winding scheme and current motor corresponding to the current speed frequency interval.

[0032] See also Figure 2 , Figure 2 A specific implementation method before step S1 is shown, which is described in detail as follows:

[0033] S11: Constructing first scheme information of the first motor according to a first speed frequency interval, a first maximum speed and a star winding scheme.

[0034] S12: Constructing second scheme information of the first motor according to the second speed frequency interval, the second maximum speed and the triangle winding scheme.

[0035] S13: Constructing first scheme information of the second motor according to the third speed frequency interval, the third maximum speed and the star winding scheme.

[0036] S14: Constructing second scheme information of the second motor according to a fourth speed frequency interval, a fourth maximum speed and a triangle winding scheme.

[0037] S15: constructing a winding scheme table based on the first scheme information of the first motor, the second scheme information of the first motor, the first scheme information of the second motor, and the second scheme information of the second motor.

[0038] Specifically, the dual motors of the compressor are respectively a first motor and a second motor. The parameter values ​​of the second motor are higher than those of the first motor, and the parameter values ​​are respectively the back electromotive force, pole pair number and moment of inertia of the motor. The pole pair number of the first motor and the second motor is set according to the actual situation, and the range is generally between 1 and 5, but the pole pair number of the first electrode is lower than that of the second electrode. The moment of inertia of the first motor and the second motor is set according to the actual situation, and the range is generally between 233Kg.mm2 and 320Kg.mm2, but the moment of inertia of the first electrode is lower than that of the second electrode. The schemes of the two motors both include a motor winding switching device that enables the motor winding to be freely switched to star connection and triangle connection.

[0039] In the embodiment of the present application, the speed frequency region in which the compressor can operate stably is set, which are respectively the first speed frequency interval, the second speed frequency interval, the third speed frequency interval, and the fourth speed frequency interval. The first speed frequency interval is an extremely low frequency operation interval, the second speed frequency interval is a low frequency operation interval, the third speed frequency interval is a high frequency operation interval, and the fourth speed frequency interval is an extremely high frequency operation interval, that is, the frequency intervals of the first speed frequency interval, the second speed frequency interval, the third speed frequency interval, and the fourth speed frequency interval are set to increase in sequence. The first maximum speed, the second maximum speed, the third maximum speed, and the fourth maximum speed are set, and the first maximum speed to the fourth maximum speed increase in sequence. Then, the first scheme information of the first motor is constructed according to the first speed frequency interval, the first maximum speed and the star winding scheme; the second scheme information of the first motor is constructed according to the second speed frequency interval, the second maximum speed and the triangle winding scheme; the first scheme information of the second motor is constructed according to the third speed frequency interval, the third maximum speed and the star winding scheme; the second scheme information of the second motor is constructed according to the fourth speed frequency interval, the fourth maximum speed and the triangle winding scheme; the winding scheme table is constructed based on the first scheme information of the first motor, the second scheme information of the first motor, the first scheme information of the second motor and the second scheme information of the second motor. The winding scheme table provided in this application is shown in Table 1 below:

[0040] Table 1

[0041]

[0042] Furthermore, a table of speed frequency regions from 0-speed startup to stable operation and corresponding motors and their winding solutions can be constructed, as shown in Table 2.

[0043] Table 2

[0044]

[0045]

[0046] It can be seen from Table 1 and Table 2 that the operating ranges and operating schemes of the two tables are the same. When viewing the motor winding scheme in the future, you can view only one table. Among them, the star winding scheme refers to the star connection scheme of the motor winding, and the delta winding scheme refers to the delta connection scheme of the motor winding.

[0047] S2. Based on the motor winding scheme information, the dual motors of the compressor are controlled to operate in opposite directions at the same speed change rate.

[0048] Specifically, according to the motor winding scheme information, the dual motors of the compressor are controlled to operate in opposite directions according to the same speed change rate, so that the target motor runs at the target maximum speed through the target winding scheme, and in order to ensure that the motor is stably wound, the other motor in the compressor is stopped. Thereby, a single-cylinder high-speed winding switching compressor can be operated stably and continuously in the full frequency band without stopping, and the cooling capacity of the compressor before and after the motor winding is switched can be minimized or remain unchanged and the energy efficiency is optimal. Among them, the speed change rate is set according to the actual situation, and the storage is not limited.

[0049] See also Figure 3 , Figure 3 The first specific implementation of step S2 is shown, which is described in detail as follows:

[0050] S2011: If the current speed frequency interval is the first speed frequency interval and the target speed frequency interval is the second speed frequency interval, the first motor is decelerated from the first maximum speed to stop at the speed change rate according to the star winding scheme, and the second motor is accelerated from stop to the first maximum speed at the speed change rate according to the star winding scheme.

[0051] S2012: When the first motor stops running and the rotation speed of the second motor reaches the first maximum rotation speed, the first motor is switched to the triangle winding scheme.

[0052] S2013: Accelerate the first motor from stop to the first maximum speed and decelerate the second motor from the first maximum speed to stop at the speed change rate according to the delta winding scheme, and decelerate the second motor from the first maximum speed to stop at the speed change rate according to the star winding scheme.

[0053] S2014: When the first motor is accelerated to the first maximum speed and the second motor stops running, the first motor is accelerated to the second maximum speed and continues to run at the second maximum speed.

[0054] Specifically, if the current speed frequency interval is the first speed frequency interval and the target speed frequency interval is the second speed frequency interval, that is, the current maximum speed is the first maximum speed, the current winding scheme is the star winding scheme, and the current motor is the first electrode; the target maximum speed is the second maximum speed, the target winding scheme is the triangle winding scheme, and the current motor is the first electrode. Therefore, the first motor is decelerated from the first maximum speed to stop running at the speed change rate according to the star winding scheme, and the second motor is accelerated from stop to the first maximum speed at the speed change rate according to the star winding scheme. When the first motor stops running and the speed of the second motor reaches the first maximum speed, the first motor is switched to the triangle winding scheme. Then the first motor is accelerated from stop to the first maximum speed at the speed change rate according to the triangle winding scheme, and the second motor is decelerated from the first maximum speed to stop at the speed change rate according to the star winding scheme. When the first motor accelerates to the first maximum speed and the second motor stops running, the first motor is accelerated to the second maximum speed and continues to run at the second maximum speed.

[0055] The first motor and the second motor are both controlled to operate in opposite directions at the same speed change rate. When both motors are accelerating or decelerating, both motors are kept in the winding state. When both motors are stable, that is, they stop running or reach the corresponding maximum speed, the operation control of the following scheme is performed.

[0056] Further, if the current speed frequency interval is the third speed frequency interval and the target speed frequency interval is the fourth speed frequency interval, the embodiment of the present application adopts an operation control scheme similar to step S2011 to step S2014. Specifically: the first motor is accelerated from stop to the second highest speed at a speed change rate according to the triangle winding scheme and the second motor is decelerated from the third highest speed to stop at a speed change rate according to the star winding scheme. When the second motor stops running and the speed of the first motor reaches the second highest speed, the second motor is switched to the triangle winding scheme. The first motor is decelerated from the second highest speed to stop at a speed change rate according to the triangle winding scheme and the second motor is accelerated from stop to the second highest speed at a speed change rate according to the triangle winding scheme. When the speed of the second motor reaches the second highest speed and the first motor stops running, the second motor is accelerated to the fourth highest speed according to the triangle winding scheme and continues to run at the fourth highest speed.

[0057] See also Figure 4 , Figure 4 A second specific implementation of step S2 is shown, which is described in detail as follows:

[0058] S2021: If the current speed frequency interval is the second speed frequency interval and the target speed frequency interval is the first speed frequency interval, the first motor is decelerated from the second maximum speed to stop at the speed change rate according to the triangle winding scheme, and the second motor is accelerated from stop to the second maximum speed at the speed change rate according to the star winding scheme.

[0059] S2022: When the first motor stops running and the speed of the second motor reaches the second maximum speed, the first motor is switched to the star winding scheme.

[0060] S2023: decelerate the second motor from the second maximum speed to the first maximum speed at the speed change rate according to the star winding scheme.

[0061] S2024: Accelerate the first motor from stop operation to the second maximum speed at the speed change rate according to the star winding scheme, and decelerate the second motor from the second maximum speed to stop operation at the speed change rate according to the star winding scheme;

[0062] S2025: When the rotation speed of the first motor reaches the first maximum rotation speed and the second motor stops running, the first motor continues to run at the first maximum rotation speed.

[0063] Specifically, if the current speed frequency interval is the second speed frequency interval and the target speed frequency interval is the first speed frequency interval, that is, the current maximum speed is the second maximum speed, the current winding scheme is the triangle winding scheme, and the current motor is the first electrode; the target maximum speed is the first maximum speed, the target winding scheme is the star winding scheme, and the current motor is the first electrode. Therefore, the first motor is decelerated from the second maximum speed to stop running at the speed change rate according to the triangle winding scheme, and the second motor is accelerated from stop to the second maximum speed at the speed change rate according to the star winding scheme. When the first motor stops running and the speed of the second motor reaches the second maximum speed, the first motor is switched to the star winding scheme. The second motor is decelerated from the second maximum speed to the first maximum speed at the speed change rate according to the star winding scheme. The first motor is accelerated from stop running to the second maximum speed at the speed change rate according to the star winding scheme, and the second motor is decelerated from the second maximum speed to stop running at the speed change rate according to the star winding scheme; when the speed of the first motor reaches the first maximum speed and the second motor stops running, the first motor continues to run at the first maximum speed.

[0064] Further, if the current speed frequency interval is the fourth speed frequency interval and the target speed frequency interval is the third speed frequency interval, the embodiment of the present application adopts an operation control scheme similar to steps S2021 to S2025. Specifically: the first motor is accelerated from stop to the second highest speed at a speed change rate according to the triangle winding scheme and the second motor is decelerated from the fourth highest speed to stop at a speed change rate according to the triangle winding scheme. When the second motor stops running and the speed of the first motor reaches the second highest speed, the second motor is switched to a star winding scheme. The first motor is decelerated from the second highest speed to stop at a speed change rate according to the triangle winding scheme and the second motor is accelerated from stop to the second highest speed at a speed change rate according to the star winding scheme. When the speed of the second motor reaches the second highest speed and the first motor stops running, the second motor is accelerated to the third highest speed according to the star winding scheme and continues to run at the third highest speed.

[0065] See also Figure 5 , Figure 5 A third specific implementation of step S2 is shown, which is described in detail as follows:

[0066] S2031: If the current speed frequency interval is the third speed frequency interval and the target speed frequency interval is the first speed frequency interval, the second motor is decelerated from the third maximum speed to the first maximum speed at the speed change rate according to the star winding scheme.

[0067] S2032: Accelerate the first motor from stop operation to the first maximum speed at the speed change rate according to the star winding scheme, and decelerate the second motor from the first maximum speed to stop operation at the speed change rate according to the star winding scheme.

[0068] S2033: When the rotation speed of the first motor reaches the first maximum rotation speed and the second motor stops running, the first motor continues to run at the first maximum rotation speed according to the star winding scheme.

[0069] Specifically, if the current speed frequency interval is the third speed frequency interval and the target speed frequency interval is the first speed frequency interval, that is, the current maximum speed is the third maximum speed, the current winding scheme is the star winding scheme, and the current motor is the second electrode; the target maximum speed is the first maximum speed, the target winding scheme is the star winding scheme, and the current motor is the first electrode. Therefore, the second motor is decelerated from the third maximum speed to the first maximum speed at the speed change rate according to the star winding scheme. When the second electrode is running stably at the first maximum speed, the first motor is accelerated from stopping to the first maximum speed at the speed change rate according to the star winding scheme, and the second motor is decelerated from the first maximum speed to stopping at the speed change rate according to the star winding scheme. When the speed of the first motor reaches the first maximum speed and the second motor stops running, the first motor continues to run at the first maximum speed according to the star winding scheme.

[0070] Further, if the current speed frequency interval is the fourth speed frequency interval and the target speed frequency interval is the first speed frequency interval, the embodiment of the present application adopts an operation control scheme similar to steps S2031 to S2033. Specifically: the second motor is decelerated from the fourth maximum speed to the first maximum speed at a speed change rate according to the triangle winding scheme. When the second motor is stably operating at the first maximum speed, the first motor is accelerated from stopping operation to the first maximum speed at a speed change rate according to the star winding scheme, and the second motor is decelerated from the first maximum speed to stopping operation at a speed change rate according to the triangle winding scheme. When the speed of the first motor reaches the first maximum speed and the second motor stops running, the first motor continues to run at the first maximum speed according to the star winding scheme.

[0071] See also Figure 6 , Figure 6 A fourth specific implementation of step S2 is shown, which is described in detail as follows:

[0072] S2041: If the current speed frequency interval is the fourth speed frequency interval and the target speed frequency interval is the second speed frequency interval, the second motor is decelerated from the fourth maximum speed to the second maximum speed at the speed change rate according to the triangle winding scheme.

[0073] S2042: Accelerate the first motor from stop operation to the second maximum speed at the speed change rate according to the triangle winding scheme, and decelerate the second motor from the second maximum speed to stop operation at the speed change rate according to the triangle winding scheme.

[0074] S2043: When the rotation speed of the first motor reaches the second maximum rotation speed and the second motor stops running, the first motor continues to run at the second maximum rotation speed according to the triangle winding scheme.

[0075] Specifically, if the current speed frequency interval is the fourth speed frequency interval and the target speed frequency interval is the second speed frequency interval, that is, the current maximum speed is the fourth maximum speed, the current winding scheme is the triangle winding scheme, and the current motor is the second electrode; the target maximum speed is the second maximum speed, the target winding scheme is the triangle winding scheme, and the current motor is the first electrode. Therefore, the second motor is decelerated from the fourth maximum speed to the second maximum speed at the speed change rate according to the triangle winding scheme. When the second electrode is running stably at the second maximum speed, the first motor is accelerated from stopping to the second maximum speed at the speed change rate according to the triangle winding scheme, and the second motor is decelerated from the second maximum speed to stopping at the speed change rate according to the triangle winding scheme. When the speed of the first motor reaches the second maximum speed and the second motor stops running, the first motor continues to run at the second maximum speed according to the triangle winding scheme.

[0076] Further, if the current speed frequency interval is the third speed frequency interval and the target speed frequency interval is the second speed frequency interval, the embodiment of the present application adopts an operation control scheme similar to steps S2041 to S2043. Specifically: the second motor is decelerated from the third maximum speed to the second maximum speed at a speed change rate according to the star winding scheme. When the second motor is stably operating at the second maximum speed, the first motor is accelerated from stopping operation to the second maximum speed at a speed change rate according to the triangle winding scheme and the second motor is decelerated from the second maximum speed to stopping operation at a speed change rate according to the star winding scheme. When the speed of the first motor reaches the second maximum speed and the second motor stops running, the first motor continues to run at the second maximum speed according to the triangle winding scheme.

[0077] See also Figure 7 , Figure 7 A fifth specific implementation of step S2 is shown, which is described in detail as follows:

[0078] S2051: If the current speed frequency interval is smaller than the target speed frequency interval and the current motor and the target motor are different motors, decelerate the current motor from the current maximum speed to stop running at the speed change rate according to the current winding scheme.

[0079] S2052: Accelerate the target motor from the stop to the target maximum speed at the speed change rate according to the target winding scheme.

[0080] S2053: If the current motor stops running and the rotation speed of the target motor reaches the target maximum rotation speed, the target motor continues to run at the target maximum rotation speed.

[0081] Specifically, if the current speed frequency interval is smaller than the target speed frequency interval and the current motor and the target motor are different motors, it can be switched from the first speed frequency interval to the third speed frequency interval, from the first speed frequency interval to the fourth speed frequency interval, from the second speed frequency interval to the third speed frequency interval, and from the second speed frequency interval to the fourth speed frequency interval.

[0082] Therefore, the embodiment of the present application decelerates the current motor from the current maximum speed to stop running at the speed change rate according to the current winding scheme. Accelerates the target motor from stop to the target maximum speed at the speed change rate according to the target winding scheme. If the current motor stops running and the speed of the target motor reaches the target maximum speed, the target motor continues to run at the target maximum speed.

[0083] In a specific embodiment, if the first speed frequency interval is switched to the third speed frequency interval, the first motor is decelerated from the first maximum speed to stop operation at a speed change rate according to the star winding scheme, and the third motor is accelerated from stop to the third maximum speed at a speed change rate according to the star winding scheme. When the first motor stops operating and the second motor stably operates at the third maximum speed, the compressor only uses the second motor in the third speed interval to continue to operate stably at the third maximum speed according to the star winding scheme.

[0084] In an embodiment of the present application, when a compressor speed frequency interval switching instruction is received, the motor winding scheme information of the current speed frequency interval and the target speed frequency interval is obtained; based on the motor winding scheme information, the dual motors of the compressor are controlled to operate in opposite directions at the same speed change rate. In an embodiment of the present invention, when the compressor needs to switch the speed frequency interval, the dual motors of the compressor are controlled to operate in opposite directions at the same speed change rate, thereby achieving frequency switching and winding scheme control for the dual motors of the compressor, which is beneficial to improving the low-frequency operation stability and low-frequency energy efficiency of the compressor and widening the high-frequency operating frequency range of the compressor. The embodiment of the present application also realizes that a single-cylinder high-speed winding switching compressor can operate in the full frequency band without stopping, can operate stably and continuously, and can ensure that the cooling capacity of the compressor before and after the motor winding switching is minimized, or remains unchanged and has the best energy efficiency.

[0085] The embodiment of the present invention further provides a drive control device for a single-cylinder high-speed rotor compressor, which is used to execute any embodiment of the drive control method for a single-cylinder high-speed rotor compressor. Figure 8 , Figure 8 A schematic block diagram of a drive control device for a single-cylinder high-speed rotor compressor provided in an embodiment of the present invention.

[0086] Among them, Figure 8As shown, the driving control device 3 of the single-cylinder high-speed rotor compressor includes a speed frequency interval switching unit 31 and a motor winding operation unit 32.

[0087] The speed frequency interval switching unit 31 is used to obtain the motor winding scheme information of the current speed frequency interval and the target speed frequency interval when receiving the compressor speed frequency interval switching instruction.

[0088] The motor winding operation unit 32 is used to control the dual motors of the compressor to operate in opposite directions at the same speed change rate based on the motor winding scheme information.

[0089] Furthermore, the dual motors of the compressor are respectively a first motor and a second motor, and the parameter value of the second motor is higher than that of the first motor; the speed frequency interval switching unit 31 includes:

[0090] A first scheme unit, configured to construct first scheme information of the first motor according to a first speed frequency interval, a first maximum speed and a star winding scheme;

[0091] A second scheme unit, configured to construct second scheme information of the first motor according to a second speed frequency interval, a second maximum speed and a triangle winding scheme;

[0092] A third scheme unit, configured to construct first scheme information of the second motor according to a third speed frequency interval, a third maximum speed and a star winding scheme;

[0093] a fourth scheme unit, configured to construct second scheme information of the second motor according to a fourth speed frequency interval, a fourth maximum speed and a triangle winding scheme;

[0094] The winding scheme table construction unit is used to construct a winding scheme table based on the first scheme information of the first motor, the second scheme information of the first motor, the first scheme information of the second motor, and the second scheme information of the second motor.

[0095] Furthermore, the motor winding operation unit 32 includes:

[0096] a first switching unit, configured to decelerate the first motor from the first maximum speed to stop running at the speed change rate according to the star winding scheme and accelerate the second motor from stop to the first maximum speed at the speed change rate according to the star winding scheme if the current speed frequency interval is the first speed frequency interval and the target speed frequency interval is the second speed frequency interval;

[0097] a first condition unit, configured to switch the first motor to the triangle winding scheme when the first motor stops running and the speed of the second motor reaches the first maximum speed;

[0098] a first operating unit, configured to accelerate the first motor from stop to the first maximum speed and decelerate at the speed change rate according to the delta winding scheme, and decelerate the second motor from the first maximum speed to stop at the speed change rate according to the star winding scheme;

[0099] The first operation result unit is used for accelerating the first motor to the second maximum speed and continuing to operate at the second maximum speed when the first motor is accelerated to the first maximum speed and the second motor stops operating.

[0100] Furthermore, the motor winding operation unit 32 further includes:

[0101] a second switching unit, configured to decelerate the first motor from the second maximum speed to stop at the speed change rate according to the triangle winding scheme and accelerate the second motor from stop to the second maximum speed at the speed change rate according to the star winding scheme if the current speed frequency interval is the second speed frequency interval and the target speed frequency interval is the first speed frequency interval;

[0102] a second condition unit, configured to switch the first motor to the star winding scheme when the first motor stops running and the speed of the second motor reaches the second maximum speed;

[0103] a second operating unit, configured to decelerate the second motor from the second maximum speed to the first maximum speed at the speed change rate according to the star winding scheme;

[0104] a third operating unit, configured to accelerate the first motor from stop operation to the second maximum speed at the speed change rate according to the star winding scheme, and decelerate the second motor from the second maximum speed to stop operation at the speed change rate according to the star winding scheme;

[0105] The second operation result unit is used to continue running the first motor at the first maximum speed when the speed of the first motor reaches the first maximum speed and the second motor stops running.

[0106] Furthermore, the motor winding operation unit 32 further includes:

[0107] a third switching unit, configured to decelerate the second motor from the third maximum speed to the first maximum speed at the speed change rate according to the star winding scheme if the current speed frequency interval is the third speed frequency interval and the target speed frequency interval is the first speed frequency interval;

[0108] a fourth operation unit, configured to accelerate the first motor from stop operation to the first maximum speed at the speed change rate according to the star winding scheme, and decelerate the second motor from the first maximum speed to stop operation at the speed change rate according to the star winding scheme;

[0109] The third operation result unit is used to operate the first motor at the first maximum speed according to the star winding scheme when the speed of the first motor reaches the first maximum speed and the second motor stops running.

[0110] Furthermore, the motor winding operation unit 32 further includes:

[0111] a fourth switching unit, configured to decelerate the second motor from the fourth maximum speed to the second maximum speed at the speed change rate according to the triangle winding scheme if the current speed frequency interval is the fourth speed frequency interval and the target speed frequency interval is the second speed frequency interval;

[0112] a fifth operating unit, configured to accelerate the first motor from stop operation to the second maximum speed at the speed change rate according to the delta winding scheme, and decelerate the second motor from the second maximum speed to stop operation at the speed change rate according to the delta winding scheme;

[0113] The fourth operation result unit is used to continue to operate the first motor at the second maximum speed according to the triangle winding scheme when the speed of the first motor reaches the second maximum speed and the second motor stops running.

[0114] Furthermore, the motor winding operation unit 32 further includes:

[0115] a fifth switching unit, configured to decelerate the current motor from the current maximum speed to stop running at the speed change rate according to the current winding scheme if the current speed frequency interval is smaller than the target speed frequency interval and the current motor and the target motor are different motors;

[0116] a sixth operating unit, configured to accelerate the target motor from the stop to the target maximum speed at the speed change rate according to the target winding scheme;

[0117] The fifth operation result unit is used to, if the current motor stops running and the rotation speed of the target motor reaches the target maximum rotation speed, continue to run the target motor at the target maximum rotation speed.

[0118] The drive control device of the single-cylinder high-speed rotor compressor can be implemented in the form of a computer program. The computer program can be implemented in the form of a computer program. Fig. 9 The air conditioner shown is running.

[0119] See also Fig. 9 , Fig. 9 5 is a schematic block diagram of an air conditioner provided by an embodiment of the present invention. The air conditioner 500 includes a processor 502 , a memory and a network interface 505 connected via a device bus 501 , wherein the memory may include a storage medium 503 and an internal memory 504 .

[0120] The storage medium 503 can store an operating device 5031 and a computer program 5032. When the computer program 5032 is executed, the processor 502 can execute a driving control method for a single-cylinder high-speed rotor compressor.

[0121] The processor 502 is used to provide computing and control capabilities to support the operation of the entire air conditioner 500.

[0122] The internal memory 504 provides an environment for the operation of the computer program 5032 in the storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute a driving control method for a single-cylinder high-speed rotor compressor.

[0123] The network interface 505 is used for network communication, such as providing transmission of data information, etc. Those skilled in the art can understand that the structure shown in the embodiment of the present application is only a block diagram of a part of the structure related to the solution of the present invention, and does not constitute a limitation on the air conditioner 500 to which the solution of the present invention is applied. The specific air conditioner 500 may include more or less components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0124] The processor 502 is used to run the computer program 5032 stored in the memory to implement the driving control method of the single-cylinder high-speed rotor compressor disclosed in the embodiment of the present invention.

[0125] Those skilled in the art will appreciate that the embodiments of the air conditioner shown in the embodiments of the present application do not constitute a limitation on the specific configuration of the air conditioner. In other embodiments, the air conditioner may include more or fewer components than shown, or combine certain components, or arrange the components differently. For example, in some embodiments, the air conditioner may only include a memory and a processor. In such embodiments, the structure and function of the memory and the processor are consistent with the above-described embodiments, and will not be described in detail herein.

[0126] It should be understood that in the embodiment of the present invention, the processor 502 may be a central processing unit (CPU), and the processor 502 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0127] In another embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. The computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the drive control method of the single-cylinder high-speed rotor compressor disclosed in the embodiment of the present invention is implemented.

[0128] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the above-described equipment, devices and units can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. Those of ordinary skill in the art can appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0129] In the several embodiments provided by the present invention, it should be understood that the disclosed equipment, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. Units with the same function may also be combined into one unit. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices or units, or may be an electrical, mechanical or other form of connection.

[0130] 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 units may be selected according to actual needs to achieve the purpose of the embodiments of the present invention.

[0131] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0132] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a background server, or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), disk or optical disk and other media that can store program codes.

[0133] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A drive control method for a single-cylinder high-speed rotor compressor, characterized in that: include: When receiving a compressor speed frequency interval switching instruction, obtaining motor winding scheme information of a current speed frequency interval and a target speed frequency interval; Based on the motor winding scheme information, the dual motors of the compressor are controlled to operate in opposite directions at the same speed change rate.

2. The driving control method of a single-cylinder high-speed rotor compressor according to claim 1, characterized in that: The dual motors of the compressor are respectively a first motor and a second motor, and the parameter value of the second motor is higher than that of the first motor; When receiving the compressor speed frequency interval switching instruction, before obtaining the motor winding scheme information of the current speed frequency interval and the target speed frequency interval, the method includes: Constructing first scheme information of the first motor according to a first speed frequency interval, a first maximum speed and a star winding scheme; Constructing second scheme information of the first motor according to a second speed frequency interval, a second maximum speed and a triangle winding scheme; Constructing first scheme information of the second motor according to the third speed frequency interval, the third maximum speed and the star winding scheme; Constructing second scheme information of the second motor according to a fourth speed frequency interval, a fourth maximum speed and a triangle winding scheme; A winding scheme table is constructed based on the first scheme information of the first motor, the second scheme information of the first motor, the first scheme information of the second motor, and the second scheme information of the second motor.

3. The driving control method of a single-cylinder high-speed rotor compressor according to claim 2, characterized in that: The controlling the dual motors of the compressor to perform opposite operation at the same speed change rate based on the motor winding scheme information includes: If the current speed frequency interval is the first speed frequency interval and the target speed frequency interval is the second speed frequency interval, the first motor is decelerated from the first maximum speed to stop operation at the speed change rate according to the star winding scheme, and the second motor is accelerated from stop to the first maximum speed at the speed change rate according to the star winding scheme; When the first motor stops running and the speed of the second motor reaches the first maximum speed, the first motor is switched to the triangle winding scheme; Accelerate the first motor from stop to the first maximum speed at the speed change rate according to the delta winding scheme and decelerate the second motor from the first maximum speed to stop at the speed change rate according to the star winding scheme; When the first motor is accelerated to the first maximum speed and the second motor stops running, the first motor is accelerated to the second maximum speed and continues to run at the second maximum speed.

4. The driving control method of a single-cylinder high-speed rotor compressor according to claim 2, characterized in that: The step of controlling the dual motors of the compressor to perform opposite operations at the same speed change rate based on the motor winding scheme information further includes: If the current speed frequency interval is the second speed frequency interval and the target speed frequency interval is the first speed frequency interval, the first motor is decelerated from the second maximum speed to stop at the speed change rate according to the triangle winding scheme and the second motor is accelerated from stop to the second maximum speed at the speed change rate according to the star winding scheme; When the first motor stops running and the speed of the second motor reaches the second maximum speed, the first motor is switched to the star winding scheme; decelerating the second motor from the second maximum speed to the first maximum speed at the speed change rate according to the star winding scheme; Accelerating the first motor from a stop to the second maximum speed at the speed change rate according to the star winding scheme and decelerating the second motor from the second maximum speed to a stop at the speed change rate according to the star winding scheme; When the rotation speed of the first motor reaches the first maximum rotation speed and the second motor stops running, the first motor continues to run at the first maximum rotation speed.

5. The driving control method of a single-cylinder high-speed rotor compressor according to claim 2, characterized in that: The step of controlling the dual motors of the compressor to perform opposite operations at the same speed change rate based on the motor winding scheme information further includes: If the current speed frequency interval is the third speed frequency interval and the target speed frequency interval is the first speed frequency interval, decelerating the second motor from the third maximum speed to the first maximum speed at the speed change rate according to the star winding scheme; Accelerating the first motor from a stop to the first maximum speed at the speed change rate according to the star winding scheme and decelerating the second motor from the first maximum speed to a stop at the speed change rate according to the star winding scheme; When the rotation speed of the first motor reaches the first maximum rotation speed and the second motor stops running, the first motor continues to run at the first maximum rotation speed according to the star winding scheme.

6. The driving control method of a single-cylinder high-speed rotor compressor according to claim 2, characterized in that: The step of controlling the dual motors of the compressor to perform opposite operations at the same speed change rate based on the motor winding scheme information further includes: If the current speed frequency interval is the fourth speed frequency interval and the target speed frequency interval is the second speed frequency interval, decelerating the second motor from the fourth maximum speed to the second maximum speed at the speed change rate according to the triangle winding scheme; Accelerating the first motor from stop to the second maximum speed at the speed change rate according to the delta winding scheme and decelerating the second motor from the second maximum speed to stop at the speed change rate according to the delta winding scheme; When the rotation speed of the first motor reaches the second maximum rotation speed and the second motor stops running, the first motor continues to run at the second maximum rotation speed according to the delta winding scheme.

7. The driving control method of a single-cylinder high-speed rotor compressor according to any one of claims 1 to 6, characterized in that: The motor winding scheme information includes a current maximum speed, a current winding scheme, a current motor, a target maximum speed, a target winding scheme, and a target motor; and the step of controlling the dual motors of the compressor to perform opposite operation at the same speed change rate based on the motor winding scheme information also includes: If the current speed frequency interval is less than the target speed frequency interval and the current motor and the target motor are different motors, decelerating the current motor from the current maximum speed to stopping operation at the speed change rate according to the current winding scheme; accelerating the target motor from the stop to the target maximum speed at the speed change rate according to the target winding scheme; If the current motor stops running and the rotation speed of the target motor reaches the target maximum rotation speed, the target motor continues to run at the target maximum rotation speed.

8. A drive control device for a single-cylinder high-speed rotor compressor, characterized in that: include: A speed frequency interval switching unit, for obtaining motor winding scheme information of a current speed frequency interval and a target speed frequency interval when receiving a compressor speed frequency interval switching instruction; The motor winding operation unit is used to control the dual motors of the compressor to operate in opposite directions at the same speed change rate based on the motor winding scheme information.

9. An air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the drive control method of the single-cylinder high-speed rotor compressor according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by a processor, enables the processor to execute the drive control method for a single-cylinder high-speed rotor compressor according to any one of claims 1 to 7.

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