Starting control method and device of single-rotor compressor, air conditioning equipment and medium

Abstract

The invention discloses a starting control method and device of a single-rotor compressor, air conditioning equipment and a medium, and the starting control method of the single-rotor compressor comprises the steps that in response to a starting instruction used for starting the single-rotor compressor, an inductance value measured value of the single-rotor compressor on any phase of motor winding is obtained; based on off-line calibration data and the inductance value measurement value, the current rotor stop position of the single-rotor compressor is determined, and the off-line calibration data represents the corresponding relation between the rotor position and the winding inductance; and controlling the single-rotor compressor to perform closed-loop starting based on the rotor stop position. According to the invention, the technical problems that the starting time of the single-rotor compressor is long and the on-load starting is easy to fail are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a startup control method, device, air-conditioning equipment and medium for a single-rotor compressor. Background Art

[0002] When the air conditioner compressor is started, the initial position of the rotor is unknown and needs to be positioned. Therefore, the compressor needs to use a three-stage start when starting.

[0003] like Figure 1 As shown in the figure, the three-stage starting process of the compressor includes: 1. Rotor positioning: that is, given a voltage vector and angle, forcing the rotor to rotate to a given position; 2. Open-loop starting, that is, giving a gradually accelerating rotating voltage vector to force the motor to rotate; 3. Closed-loop operation: When the motor rotates to a certain speed, the voltage and current of the motor can be read through the position estimation signal, and the position angle and speed of the motor can be calculated, and the closed-loop operation state can be entered through a certain method. The starting torque of the three-stage starting is small, and it is easy to fail to start under load; and the many starting links lead to a long starting time. Summary of the invention

[0004] The present invention provides a startup control method, device, air conditioning equipment and medium for a single-rotor compressor, which are used to solve the technical problems of long startup time of the compressor and easy startup failure during load startup.

[0005] In a first aspect of the present invention, a start-up control method for a single-rotor compressor is provided, comprising: in response to a start-up instruction for starting the single-rotor compressor, obtaining an inductance measurement value of the single-rotor compressor on any phase motor winding; determining a current rotor stop position of the single-rotor compressor based on offline calibration data and the inductance measurement value, wherein the offline calibration data characterizes a correspondence between a rotor position and a winding inductance; and based on the rotor stop position, controlling the single-rotor compressor to perform a closed-loop start-up.

[0006] In some embodiments, obtaining the measured inductance value of any phase motor winding of the single-rotor compressor includes: injecting a first pulse voltage into any phase motor winding of the single-rotor compressor; obtaining the maximum phase current and discharge duration of the phase motor winding under the action of the first pulse voltage; and determining the measured inductance value of the single-rotor compressor on the phase motor winding based on the maximum phase current and the discharge duration.

[0007] In some embodiments, determining the current rotor stop position of the single-rotor compressor based on the offline calibration data and the inductance measurement value includes: determining a target inductance interval where the inductance measurement value is located from M inductance intervals, wherein the offline calibration data is a one-to-one correspondence between M rotor angle intervals and the M inductance intervals, and the M rotor angle intervals are formed by dividing the rotor stop angle range of the single-rotor compressor, and M is an integer greater than 5; obtaining the rotor angle interval corresponding to the target inductance interval as the current rotor stop position of the single-rotor compressor.

[0008] In some embodiments, the offline calibration data is obtained in advance through offline testing through the following steps: selecting multiple electrical angles from the rotor stop angle range as target electrical angles; injecting a second pulse voltage into any phase motor winding of the single-rotor compressor when the rotor of the single-rotor compressor is at the target electrical angle; obtaining an inductance sample of the phase motor winding under the action of the second pulse voltage; and constructing the offline calibration data based on the multiple electrical angles and the inductance samples corresponding to each of the electrical angles.

[0009] In some embodiments, the multiple electrical angles include M+1 electrical angles; the offline calibration data is constructed based on the multiple electrical angles and the inductance samples corresponding to each of the electrical angles, including: determining a rotor angle interval based on every two adjacent electrical angles in the M+1 electrical angles to obtain the M rotor angle intervals; for each of the rotor angle intervals, based on two inductance samples corresponding to the two electrical angles forming the rotor angle interval, generating an inductance interval corresponding to the rotor angle interval.

[0010] In some embodiments, the interval length of each of the rotor angle intervals is no greater than 30°.

[0011] In some embodiments, controlling the single-rotor compressor to perform closed-loop starting based on the rotor stop position of the single-rotor compressor includes: determining an initial current phase angle of each phase motor winding according to the rotor stop position; applying a phase current that satisfies the initial current phase angle to each phase motor winding of the single-rotor compressor, so that the operating frequency of the single-rotor compressor gradually increases to the target frequency specified by the start instruction.

[0012] In a second aspect of the present invention, a start-up control device for a single-rotor compressor is provided, comprising: an inductance acquisition unit, for acquiring the inductance measurement value of the single-rotor compressor on any phase motor winding in response to a start-up instruction for starting the single-rotor compressor; a rotor position determination unit, for determining the current rotor stop position of the single-rotor compressor based on offline calibration data and the inductance measurement value, wherein the offline calibration data characterizes the correspondence between the rotor position and the winding inductance; and a closed-loop start-up control unit, for controlling the single-rotor compressor to perform closed-loop start-up based on the rotor stop position.

[0013] In a third aspect of the present invention, an air-conditioning device is provided, comprising 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 startup control method for the single-rotor compressor described in any embodiment of the first aspect is implemented.

[0014] In a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the startup control method of the single-rotor compressor described in any embodiment of the first aspect is implemented.

[0015] According to one or more embodiments provided by the present invention, at least the following technical effects or advantages are achieved:

[0016] In one or more embodiments provided by the present invention, in response to a start instruction for starting a single-rotor compressor, the measured inductance value of the single-rotor compressor on any phase motor winding is obtained; the current rotor stop position of the single-rotor compressor is determined based on offline calibration data and the obtained inductance measurement value, wherein the offline calibration data represents the corresponding relationship between the rotor position and the winding inductance; and the single-rotor compressor is controlled to perform closed-loop start-up based on the rotor stop position. The above technical scheme utilizes the fixed installation matching relationship between the rotor and the roller of the single-rotor compressor, and estimates the position of the rotor when it stops according to the measured inductance value on the motor winding, thus obtaining the initial position required for the rotor to start, thereby directly controlling the single-rotor compressor to perform closed-loop start-up, omitting the process of rotor positioning and open-loop start-up, saving the start-up time of the single-rotor compressor, and improving the starting torque, which can also improve the success rate of the single-rotor compressor under-load start-up. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is the current waveform diagram of the compressor's three-stage starting process;

[0019] Figure 2 is a flow chart of a startup control method for a single-rotor compressor in an embodiment of the present invention;

[0020] Figure 3 is a waveform diagram of the first pulse voltage and the generated current in an embodiment of the present invention;

[0021] Figure 4 The matching relationship between the compression chamber roller and the cylinder of a single-rotor compressor;

[0022] Figure 5 is a current waveform diagram of the starting process of a single-rotor compressor in an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the startup control device of the single-rotor compressor in an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the air conditioning device in the embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment 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.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] The present invention provides a startup control method for a single-rotor compressor, which can be applied to an electrical device with a built-in single-rotor compressor, and the electrical device can be an air-conditioning device, a refrigerator, a heat pump water heater, or the like. Figure 2FIG. 1 is a flow chart of a startup control method for a single-rotor compressor according to an embodiment of the present invention. Figure 2 As shown, the compressor startup control method includes the following steps S101 to S103.

[0028] S101: In response to a start instruction for starting a single-rotor compressor, obtain a measured value of the inductance of any phase motor winding of the single-rotor compressor.

[0029] Taking the electrical equipment as an air conditioner as an example, the start instruction may be used to start any mode of the air conditioner that requires running its single rotor compressor. For example, the start instruction may be used to start the cooling mode, heating mode or dehumidification mode of the air conditioner.

[0030] In some embodiments, obtaining the inductance measurement value of any phase motor winding of a single-rotor compressor may include: injecting a first pulse voltage into any phase motor winding of the single-rotor compressor; after injecting the first pulse voltage into any phase motor winding of the single-rotor compressor, obtaining the maximum phase current and discharge duration of the phase motor winding under the action of the first pulse voltage; based on the obtained maximum phase current and discharge duration, determining the inductance measurement value of the single-rotor compressor on the phase motor winding.

[0031] Figure 3 : is a waveform diagram of the first pulse voltage and the generated current in the embodiment of the present invention. Figure 3 As shown, taking the injection of a first pulse voltage into the X-phase motor winding of a single-rotor compressor (the X-phase may be the A-phase, B-phase or C-phase in the three-phase motor winding of the single-rotor compressor) as an example, the first pulse voltage may be a square pulse with a set amplitude and a certain duration t'. After the first pulse voltage is injected into the X-phase motor winding, the phase current on the X-phase motor winding increases first and then decreases. It can be understood that after the first pulse voltage is injected into the X-phase motor winding of the single-rotor compressor, the current on the X-phase motor winding is sampled multiple times, and based on the current sampling values ​​of the X-phase motor winding obtained by multiple samplings, the maximum phase current i of the X-phase motor winding during the current change process can be determined. max And the discharge time t.

[0032] In some embodiments, the measured inductance value of the phase motor winding can be calculated by the relationship between voltage and inductance:

[0033]

[0034] Where L is the measured inductance of the motor winding of that phase, Represents the derivative of current with respect to time, indicating how fast the current changes, i max is the maximum phase current, t is the discharge time, V t(t) represents the voltage size of the first pulse voltage, that is, the amplitude of the first pulse voltage.

[0035] S102: Determine a current rotor stop position of the single-rotor compressor based on offline calibration data and an inductance measurement value, wherein the offline calibration data represents a corresponding relationship between a rotor position and a winding inductance.

[0036] In some implementations, the offline calibration data may be a one-to-one correspondence between M inductance intervals and M rotor angle intervals, where M is an integer greater than 5. The M rotor angle intervals are formed by dividing the rotor stop angle range of the single rotor compressor.

[0037] Figure 4 The relationship between the roller and cylinder of the compression chamber of a single-rotor compressor. It should be noted that because the installation relationship between the rotor and the roller of a single-rotor compressor is fixed, the position of the roller is related to the high and low pressures. Taking a three-pole single-rotor compressor as an example, since the pressure of a single-rotor compressor needs to be balanced after shutdown, the roller will stop at Figure 4 The rotor position is within the 60° mechanical angle range shown in the figure. Correspondingly, the rotor position is also within a mechanical angle range of no more than 60°. According to the relationship between the electrical angle and the mechanical angle, after a single-rotor compressor is shut down, the rotor will stop within an electrical angle range of 180°. Similarly, after a single-rotor compressor with other pairs of poles is shut down, the rotor will also stop within an electrical angle range of 180°, but the corresponding mechanical angle is no longer 60°. In other words, the rotor stop angle range of a single-rotor compressor refers to an electrical angle range of 180°.

[0038] It can be understood that the M rotor angle intervals are formed by dividing the electrical angle range of 180°, wherein the interval length of each rotor angle interval is not greater than 30°, and the interval lengths of the M rotor angle intervals can be the same. The interval length of the rotor angle interval can be set to 30°, 20°, 15° or even shorter. Taking the interval length of each rotor angle interval as 30°, the rotor stop angle range of the single rotor compressor can be divided into six rotor angle intervals: [0°, 30°), [30°, 60°), [60°, 90°), [90°, 120°), [120°, 150°) and [150°~180°]. More precisely, the rotor stop angle range of the single rotor compressor can be divided into nine rotor angle intervals with an interval length of 20°: [0°, 20°), [20°, 40°) ... [160°, 180°].

[0039] In the case where the off-line calibration data is a one-to-one correspondence between M inductance intervals and M rotor angle intervals, there may be a variety of implementations for determining the current rotor stop position of the single-rotor compressor.

[0040] In some embodiments, a target inductance interval where the inductance measurement value is located can be determined from the M inductance intervals, and a rotor angle interval corresponding to the target inductance interval can be obtained as the current rotor stop position of the single-rotor compressor. In other words, the current rotor stop position of the single-rotor compressor is an angle interval, and as long as the interval length of the divided M rotor angle intervals is not greater than 30°, it is sufficient to accurately control the single-rotor compressor to start in a closed loop from zero speed, thereby reducing the time consumption of the test process.

[0041] In other embodiments, a target inductance interval where the inductance measurement value is located is determined from the M inductance intervals, and a target rotor angle interval corresponding to the target inductance interval is obtained from the M standard rotor angle intervals; interpolation calculation is performed based on the target inductance interval and the corresponding target rotor angle interval to obtain a rotor angle that matches the inductance measurement value within the target rotor angle interval as the current rotor stop position of the single-rotor compressor. In other words, the current rotor stop position of the single-rotor compressor is a specific electrical angle value, which is more accurate, so that the initial phase angle of the phase current given when the compressor is closed-loop started is more accurate.

[0042] In some embodiments, the offline calibration data may be obtained in advance through offline testing through the following steps: selecting multiple electrical angles from the rotor stop angle range as target electrical angles, and injecting a second pulse voltage into any phase motor winding of the single-rotor compressor when the rotor of the single-rotor compressor is at the target electrical angle; obtaining an inductance sample of the phase motor winding under the action of the second pulse voltage; and constructing offline calibration data based on the multiple electrical angles and the inductance samples corresponding to each electrical angle.

[0043] It should be noted that the second pulse voltage and the first pulse voltage may be the same or different pulse voltages.

[0044] During offline testing, it is necessary to inject a second pulse voltage into any phase motor winding of the single-rotor compressor each time the rotor of the single-rotor compressor is rotated to the target electrical angle currently selected, so as to obtain an inductance sample of the motor winding of the phase under the action of the second pulse voltage, as the inductance sample corresponding to the target electrical angle currently selected. In the case where the offline calibration data is a one-to-one correspondence between M rotor angle intervals and M inductance intervals, it is necessary to select M+1 electrical angles within the rotor stop angle range, including the two end point electrical angles and M-1 intermediate electrical angles within the rotor stop angle range. Taking the selection of seven electrical angles within the rotor stop angle range as an example, seven inductance samples can be obtained in one-to-one correspondence: L0, L1, L2, L3, L4, L5, L6. Taking a single-rotor compressor with three pairs of poles as an example, the rotor of the single-rotor compressor needs to be rotated to mechanical angles of 0°, 10°, 20°, 30°, 40°, 50° and 60° in sequence, so that the electrical angle of the rotor is 0°, 30°, 60°, 90°, 120°, 150° and 180° in sequence.

[0045] It should be understood that each time after the rotor of the single-rotor compressor is rotated to the target electrical angle selected for the current time, obtaining an inductance sample of the phase motor winding under the action of the second pulse voltage may include: obtaining a phase current maximum value sample and a discharge time sample of the phase motor winding under the action of the second pulse voltage; based on the phase current maximum value sample and the discharge time sample, determining the inductance of the single-rotor compressor on the phase motor winding as the inductance sample corresponding to the target electrical angle selected for the current time. It should be noted that more implementation details of obtaining each inductance sample through offline testing can refer to the aforementioned process of obtaining the inductance test value, which will not be repeated here.

[0046] In some embodiments, M+1 electrical angles are selected from the rotor stop angle range; and offline calibration data is constructed based on multiple electrical angles and inductance samples corresponding to each electrical angle, which may include: determining a rotor angle interval based on every two adjacent electrical angles in the M+1 electrical angles, thereby obtaining M rotor angle intervals; for each rotor angle interval in the M rotor angle intervals, based on two inductance samples corresponding to the two electrical angles forming the rotor angle interval, generating an inductance interval corresponding to the rotor angle interval, thereby obtaining M inductance intervals corresponding one-to-one to the M rotor angle intervals.

[0047] Taking the six rotor angle intervals divided from the rotor stop angle range of 180° as an example, the offline calibration data formed can refer to the one-to-one correspondence between the rotor angle interval and the inductance interval as shown in Table 1 below:

[0048] Table 1

[0049] Inductance range Rotor angle range [L0, L1) [0°，30°) [L1, L2) [30°，60°) [L2, L3) [60°，90°) [L3, L4) [90°，120°) [L4, L5) [120°，150°) [L5, L6] [150°，180°]

[0050] In other embodiments, based on the selected multiple electrical angles and the inductance samples corresponding to each electrical angle, the constructed offline calibration data can also be a one-to-one correspondence between multiple electrical angles and multiple inductance samples. Taking nine electrical angles selected within the rotor stop angle range of 180° as an example, the determined offline calibration data can be referred to as shown in the following Table 2:

[0051] Table 2

[0052] Inductance Sample Electrical angle L0 0° L1 20° L2 40° L3 60° L4 80° L5 100° L6 120° L7 140° L8 160° L9 180°

[0053] Based on the one-to-one correspondence between multiple electrical angles and multiple inductance samples, two inductance samples adjacent to the inductance measurement value on the phase motor winding and their corresponding two electrical angle samples are obtained for interpolation calculation to obtain the rotor angle of the single-rotor compressor, and the calculated rotor angle is used as the current rotor stop position of the single-rotor compressor. The current rotor stop position of the single-rotor compressor is a specific electrical angle value, which is more accurate, making the initial phase angle of the phase current given when the compressor is closed-loop started more accurate.

[0054] S103: Based on the rotor stop position, control the single-rotor compressor to perform closed-loop startup.

[0055] In some embodiments, the initial phase angle of the current of each phase motor winding of the single-rotor compressor is determined according to the rotor stop position; a phase current satisfying the initial phase angle of the current is applied to each phase motor winding of the single-rotor compressor, so that the operating frequency of the single-rotor compressor is gradually increased to the target frequency specified by the start instruction. For example, if the target frequency is 10 Hz, the operating frequency of the single-rotor compressor is gradually increased from zero to 10 Hz by controlling the closed-loop start of the single-rotor compressor.

[0056] Figure 5 : is a current waveform diagram of the startup process of a single rotor compressor in an embodiment of the present invention. Figure 5 As shown, in the start-up control method for a single-rotor compressor provided by the present invention, the current directly enters a closed-loop operation state after a short-time change of first increasing and then decreasing occurs under the action of the first pulse voltage, thereby reducing the start-up link.

[0057] Based on the same inventive concept, the present invention also provides a startup control device for a single-rotor compressor. Figure 6 FIG. 1 is a schematic diagram of the structure of the startup control device of the single-rotor compressor in an embodiment of the present invention. Figure 6As shown, the start-up control device of the single-rotor compressor includes: an inductance acquisition unit 601, which is used to obtain the inductance measurement value of the single-rotor compressor on any phase motor winding in response to a start-up instruction for starting the single-rotor compressor; a rotor position determination unit 602, which is used to determine the current rotor stop position of the single-rotor compressor based on offline calibration data and the inductance measurement value, wherein the offline calibration data characterizes the corresponding relationship between the rotor position and the winding inductance; and a closed-loop start-up control unit 603, which is used to control the single-rotor compressor to perform closed-loop start-up based on the rotor stop position.

[0058] In some embodiments, the inductance acquisition unit 601 may include: a first injection subunit, used to inject a first pulse voltage into any phase motor winding of the single-rotor compressor; a parameter acquisition subunit, used to obtain the maximum phase current and discharge duration of the phase motor winding under the action of the first pulse voltage; and an inductance determination subunit, used to determine the inductance measurement value of the single-rotor compressor on the phase motor winding based on the maximum phase current and the discharge duration.

[0059] In some embodiments, the rotor position determination unit 602 may include: a first interval determination subunit, used to determine the target inductance interval where the inductance measurement value is located from M inductance intervals, wherein the offline calibration data is a one-to-one correspondence between M rotor angle intervals and the M inductance intervals, and the M rotor angle intervals are divided by the rotor stop angle range of the single-rotor compressor, and M is an integer greater than 5; a second interval determination subunit, used to obtain the rotor angle interval corresponding to the target inductance interval as the current rotor stop position of the single-rotor compressor.

[0060] In some embodiments, the device also includes: a calibration unit, which is used to perform offline testing in advance to obtain offline calibration data; wherein, the calibration unit includes: an angle selection subunit, which is used to select multiple electrical angles from the rotor stop angle range as target electrical angles; a second injection subunit, which is used to inject a second pulse voltage into any phase motor winding of the single-rotor compressor when the rotor of the single-rotor compressor is at the target electrical angle; a sample acquisition subunit, which is used to obtain an inductance sample of the phase motor winding under the action of the second pulse voltage; a data construction subunit, which is used to construct the offline calibration data based on the multiple electrical angles and the inductance samples corresponding to each of the electrical angles.

[0061] In some embodiments, the multiple electrical angles include M+1 electrical angles; the data construction subunit can be used to: determine a rotor angle interval based on every two adjacent electrical angles in the M+1 electrical angles to obtain the M rotor angle intervals; for each of the rotor angle intervals, based on two inductance samples corresponding to the two electrical angles forming the rotor angle interval, generate an inductance interval corresponding to the rotor angle interval.

[0062] In some embodiments, the interval length of each of the rotor angle intervals is no greater than 30°.

[0063] In some embodiments, the closed-loop starting control unit 603 may include: a phase determination subunit, used to determine the initial phase angle of the current of each phase motor winding according to the rotor stop position; a control subunit, used to apply a phase current that satisfies the initial current phase angle to each phase motor winding of the single-rotor compressor, so that the operating frequency of the single-rotor compressor gradually increases to the target frequency specified by the starting instruction.

[0064] The starting control device of the single-rotor compressor can be used to implement the starting control method of the single-rotor compressor mentioned above. More implementation details of the starting control device of the single-rotor compressor can refer to the starting control method of the single-rotor compressor mentioned above. For the sake of brevity of the specification, they will not be repeated here.

[0065] Based on the same inventive concept, the present invention also provides an air-conditioning device, including a single-rotor compressor. Figure 7 FIG. 2 shows a schematic diagram of the structure of an air conditioning device in an embodiment of the present invention. Figure 7 As shown, the air conditioning device also includes: a memory 704, a processor 702, and a computer program stored in the memory 704 and executable on the processor 702. When the processor 702 executes the program, the startup control method of the single-rotor compressor of any of the aforementioned embodiments is implemented.

[0066] Among them, Figure 7In the embodiment of the present invention, a bus architecture (represented by bus 700) is shown, which may include any number of interconnected buses and bridges, and bus 700 links various circuits including one or more processors represented by processor 702 and memory represented by memory 704. Bus 700 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 705 provides an interface between bus 700 and receiver 701 and transmitter 703. Receiver 701 and transmitter 703 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 702 is responsible for managing bus 700 and general processing, while memory 704 may be used to store data used by processor 702 when performing operations.

[0067] Based on the same inventive concept, the present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the startup control method of the single-rotor compressor described in any of the aforementioned embodiments is implemented.

[0068] Although some embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

[0069] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A startup control method for a single-rotor compressor, characterized in that: include: In response to a start instruction for starting a single-rotor compressor, obtaining a measured value of the inductance of any one-phase motor winding of the single-rotor compressor; Determining a current rotor stop position of the single-rotor compressor based on offline calibration data and the inductance measurement value, wherein the offline calibration data represents a corresponding relationship between the rotor position and the winding inductance; Based on the rotor stop position, the single rotor compressor is controlled to perform closed-loop startup.

2. The method according to claim 1, characterized in that The obtaining of the inductance measurement value of the single-rotor compressor on any phase motor winding comprises: Injecting a first pulse voltage into any one-phase motor winding of the single-rotor compressor; Obtaining the maximum phase current and discharge duration of the phase motor winding under the action of the first pulse voltage; Based on the phase current maximum value and the discharge duration, a measured value of the inductance of the single-rotor compressor on the motor winding of the phase is determined.

3. The method according to claim 1, characterized in that The determining the current rotor stop position of the single-rotor compressor based on the offline calibration data and the inductance measurement value comprises: Determine a target inductance interval where the inductance measurement value is located from the M inductance intervals, wherein the offline calibration data is a one-to-one correspondence between M rotor angle intervals and the M inductance intervals, the M rotor angle intervals are formed by dividing the rotor stop angle range of the single rotor compressor, and M is an integer greater than 5; A rotor angle interval corresponding to the target inductance interval is obtained as a current rotor stop position of the single-rotor compressor.

4. The method according to claim 3, characterized in that The offline calibration data is obtained in advance by offline testing in the following steps: Selecting a plurality of electrical angles from the rotor stop angle range as target electrical angles; In the state where the rotor of the single-rotor compressor is at the target electrical angle, injecting a second pulse voltage into any one-phase motor winding of the single-rotor compressor; Obtaining an inductance sample of the phase motor winding under the action of the second pulse voltage; The offline calibration data is constructed based on the multiple electrical angles and the inductance samples corresponding to each of the electrical angles.

5. The method according to claim 4, characterized in that The multiple electrical angles include M+1 electrical angles; The step of constructing the offline calibration data based on the multiple electrical angles and the inductance samples corresponding to each electrical angle includes: Determine a rotor angle interval based on every two adjacent electrical angles in the M+1 electrical angles to obtain the M rotor angle intervals; For each of the rotor angle intervals, an inductance interval corresponding to the rotor angle interval is generated based on two inductance samples corresponding to two electrical angles forming the rotor angle interval.

6. The method according to claim 3, characterized in that The interval length of each rotor angle interval is no greater than 30°.

7. The method according to claim 1, characterized in that The controlling the single-rotor compressor to perform closed-loop startup based on the rotor stop position of the single-rotor compressor comprises: Determining the initial phase angle of the current of each phase motor winding according to the rotor stop position; A phase current satisfying the initial current phase angle is applied to each phase motor winding of the single-rotor compressor, so that the operating frequency of the single-rotor compressor is gradually increased to the target frequency specified by the start-up instruction.

8. A startup control device for a single-rotor compressor, characterized in that: include: an inductance acquisition unit, for acquiring a measured value of the inductance of any one-phase motor winding of the single-rotor compressor in response to a start instruction for starting the single-rotor compressor; a rotor position determination unit, configured to determine a current rotor stop position of the single-rotor compressor based on offline calibration data and the inductance measurement value, wherein the offline calibration data represents a corresponding relationship between the rotor position and the winding inductance; A closed-loop start control unit is used to control the single-rotor compressor to perform closed-loop start based on the rotor stop position.

9. An air conditioning device, characterized in that: It includes a single-rotor compressor, and also includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the startup control method for the single-rotor compressor described in any one of claims 1-7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the startup control method of the single-rotor compressor described in any one of claims 1-7 is implemented.

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