Low-temperature start-up method, device, air conditioner and storage medium for compressor

Abstract

This invention discloses a method, apparatus, air conditioner, and storage medium for low-temperature compressor startup. The method includes: responding to a startup command and determining the current ambient temperature; determining the compressor's open-loop startup current and open-loop startup time based on the current ambient temperature, wherein the open-loop startup current and open-loop startup time are inversely correlated with the current ambient temperature; and controlling the compressor to start based on the open-loop startup current during the open-loop startup time. This method determines the compressor's open-loop startup current and open-loop startup time based on the current ambient temperature, and the open-loop startup current and open-loop startup time vary with the current ambient temperature, ensuring that the compressor can start normally in low-temperature environments while reducing pipeline vibration and startup noise during compressor startup.

Description

Technical Field

[0001] This application relates to the field of compressor control technology, and in particular to a method, apparatus, air conditioner and storage medium for low-temperature starting of a compressor. Background Technology

[0002] In related technologies, the viscosity of compressor oil varies under different ambient temperatures; the lower the ambient temperature, the more viscous the compressor oil. Therefore, the starting current required by the compressor varies under different ambient temperatures. Due to the uncertainty of the environment in which the air conditioning compressor operates, if the starting current is too high, it will cause excessive vibration in the pipeline during startup, posing a safety risk, and will also increase startup noise; if the starting current is too low, the compressor will not be able to start normally. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a low-temperature start-up method for a compressor, which determines the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature, and the compressor's open-loop start-up current and open-loop start-up time change with the current ambient temperature. This ensures that the compressor can start normally in low-temperature environments while reducing pipeline vibration and start-up noise during compressor startup.

[0004] A second objective of this invention is to provide a computer-readable storage medium.

[0005] The third objective of this invention is to provide an air conditioner.

[0006] The fourth objective of this invention is to provide a low-temperature start-up device for a compressor.

[0007] To achieve the above objectives, a low-temperature start-up method for a compressor is proposed according to a first aspect embodiment of the present invention, comprising: determining the current ambient temperature in response to a start-up command; determining the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature, wherein the open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature; and controlling the compressor to start according to the open-loop start-up current during the open-loop start-up time.

[0008] According to the low-temperature start-up method for a compressor of the present invention, in response to a start-up command, the current ambient temperature is determined, and the open-loop start-up current and open-loop start-up time of the compressor are determined based on the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. Therefore, the lower the current ambient temperature, the more viscous the compressor oil, the greater the open-loop start-up current, and the longer the open-loop start-up time, thus enabling normal compressor start-up in low-temperature environments. Furthermore, when the current ambient temperature rises, the viscosity of the compressor oil decreases, the open-loop start-up current decreases, and the open-loop start-up time shortens, reducing pipeline vibration and start-up noise during compressor start-up, thereby reducing safety risks.

[0009] According to one embodiment of the present invention, determining the open-loop starting current and open-loop starting time of the compressor based on the current ambient temperature includes: determining the difference between the current ambient temperature and a preset temperature threshold; and determining the open-loop starting current and open-loop starting time based on the difference, a preset starting current value, and a preset starting time.

[0010] According to one embodiment of the present invention, the open-loop starting current is calculated according to the following formula: I = (T - T0) * K + I0, where I is the open-loop starting current, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient and K < 0, and I0 is the preset starting current value.

[0011] According to an embodiment of the present invention, the open-loop start-up time is calculated according to the following formula: t=(T-T0)*K+t0, where t is the open-loop start-up time, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient and K<0, and t0 is the preset start-up time.

[0012] According to one embodiment of the present invention, determining the open-loop starting current and open-loop starting time of the compressor based on the current ambient temperature includes: determining the temperature range in which the current ambient temperature is located; and determining the corresponding open-loop starting current and open-loop starting time based on the temperature range in which the current ambient temperature is located, wherein different temperature ranges correspond to different open-loop starting currents and open-loop starting times.

[0013] According to one embodiment of the present invention, when the current ambient temperature is greater than or equal to a first preset temperature, the open-loop starting current is determined to be a first preset current, and the open-loop starting time is determined to be a first preset time; when the current ambient temperature is less than the first preset temperature but greater than or equal to a second preset temperature, the open-loop starting current is determined to be a second preset current, and the open-loop starting time is determined to be a second preset time, wherein the second preset current is greater than the first preset current, and the second preset time is greater than the first preset time; when the current ambient temperature is less than the second preset temperature but greater than or equal to a third preset temperature, the open-loop starting current is determined to be a third preset current, and the open-loop starting time is determined to be a third preset time, wherein the third preset current is greater than the second preset current, and the third preset time is greater than the second preset time; when the current ambient temperature is less than the third preset temperature, the open-loop starting current is determined to be a fourth preset current, and the open-loop starting time is determined to be a fourth preset time, wherein the fourth preset current is greater than the third preset current, and the fourth preset time is greater than the third preset time.

[0014] According to one embodiment of the present invention, the open-loop starting current is less than or equal to a preset limiting starting current, and the open-loop starting time is less than or equal to a preset time threshold, wherein the preset limiting starting current is determined based on the demagnetizing current of the compressor.

[0015] To achieve the above objectives, a computer-readable storage medium is provided according to a second aspect of the present invention, having stored thereon a low-temperature start-up program for a compressor, which, when executed by a processor, implements the low-temperature start-up method for a compressor according to any of the foregoing embodiments.

[0016] According to the computer-readable storage medium of the present invention, by executing the computer program of the above-described low-temperature start-up method for the compressor, the open-loop start-up current and open-loop start-up time of the compressor are determined according to the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. The open-loop start-up current and open-loop start-up time of the compressor change with the current ambient temperature, which ensures that the compressor can start normally in a low-temperature environment, while reducing pipeline vibration and start-up noise during compressor start-up.

[0017] To achieve the above objectives, an air conditioner is provided according to a third aspect of the present invention, comprising: a memory, a processor, and a low-temperature start-up program for a compressor stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the low-temperature start-up method for the compressor of any of the foregoing embodiments.

[0018] According to an embodiment of the present invention, the air conditioner executes a computer program for the low-temperature start-up method of the compressor by a processor, and determines the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. The open-loop start-up current and open-loop start-up time of the compressor change with the current ambient temperature, which ensures that the compressor can start normally in a low-temperature environment, while reducing pipeline vibration and start-up noise during compressor start-up.

[0019] To achieve the above objectives, a low-temperature start-up device for a compressor is provided according to a fourth aspect of the present invention, comprising: a first determining module for determining the current ambient temperature in response to a start-up command; a second determining module for determining the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature, wherein the open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature; and a control module for controlling the compressor to start according to the open-loop start-up current during the open-loop start-up time.

[0020] According to an embodiment of the present invention, a low-temperature start-up device for a compressor determines the current ambient temperature in response to a start-up command via a first determining module, and determines the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature via a second determining module. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. Therefore, the lower the current ambient temperature, the more viscous the compressor oil, the greater the open-loop start-up current, and the longer the open-loop start-up time, thus enabling normal compressor start-up in low-temperature environments. Furthermore, when the current ambient temperature rises, the viscosity of the compressor oil decreases, the open-loop start-up current decreases, and the open-loop start-up time shortens, reducing pipeline vibration and start-up noise during compressor start-up, thereby reducing safety risks.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a waveform diagram of the compressor starting current according to an embodiment of the present invention;

[0023] Figure 2 This is a timing diagram of the compressor starting current according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic flowchart of a low-temperature start-up method for a compressor according to an embodiment of the present invention;

[0025] Figure 4This is a schematic flowchart of a low-temperature start-up method for a compressor employing staged control according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic flowchart of a low-temperature start-up method for a compressor employing linear control according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of an air conditioner system according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of a low-temperature start-up device for a compressor according to an embodiment of the present invention. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] It should be noted that this application is based on the inventor's understanding and research into the following issues:

[0031] like Figure 1 and Figure 2 As shown, the compressor startup is divided into three stages: positioning, open-loop startup, and closed-loop startup. If the compressor temperature is too low or the compressor oil viscosity is too high during the open-loop stage, and if the compressor's open-loop current amplitude A and open-loop running time T are too small, the compressor will fail to start. If the compressor's open-loop current amplitude A and open-loop running time T are too large, the compressor startup noise will be too loud.

[0032] Based on this, embodiments of the present invention provide a method, apparatus, air conditioner, and storage medium for low-temperature start-up of a compressor. The open-loop start-up current and open-loop start-up time of the compressor are determined according to the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. The open-loop start-up current and open-loop start-up time of the compressor change with the current ambient temperature, which ensures that the compressor can start normally in a low-temperature environment, while reducing pipeline vibration and start-up noise during compressor start-up.

[0033] The following description, with reference to the accompanying drawings, describes a low-temperature start-up method, apparatus, air conditioner, and storage medium for a compressor according to embodiments of the present invention.

[0034] Figure 3 This is a schematic flowchart of a low-temperature start-up method for a compressor according to an embodiment of the present invention. Figure 3 As shown, the low-temperature start-up method for the compressor includes the following steps:

[0035] S101, in response to the startup command, determines the current ambient temperature.

[0036] Specifically, the current ambient temperature is the outdoor ambient temperature. When the compressor is placed outdoors, the compressor oil will become more viscous due to the low outdoor temperature, which will prevent the compressor from starting normally.

[0037] It should be noted that the compressor can be a variable frequency compressor assembly in an air conditioning system. The air conditioning system includes an evaporator, a condenser, a variable frequency compressor assembly, and an electronic expansion valve (or capillary tube). The variable frequency compressor assembly includes a variable frequency compressor and a variable frequency drive controller. The method in this embodiment can be applied to a variable frequency drive controller.

[0038] S102, based on the current ambient temperature, determine the compressor's open-loop starting current and open-loop starting time, wherein the open-loop starting current and open-loop starting time are inversely correlated with the current ambient temperature.

[0039] In other words, the lower the ambient temperature, the more viscous the compressor oil, and the greater the compressor's starting load. Therefore, it is necessary to increase the compressor's open-loop starting current and extend the open-loop starting time to ensure that the compressor can start normally. If only the open-loop starting current is increased while the open-loop starting time is too short, the compressor oil may not be able to circulate properly due to insufficient open-loop starting time, resulting in the compressor failing to start normally. Conversely, the higher the ambient temperature, the lower the viscosity of the compressor oil, and the smaller the compressor's starting load. Therefore, it is necessary to reduce the compressor's open-loop starting current and shorten the open-loop starting time.

[0040] In some embodiments, determining the compressor's open-loop starting current and open-loop starting time based on the current ambient temperature includes: determining the difference between the current ambient temperature and a preset temperature threshold; and determining the open-loop starting current and open-loop starting time based on the difference, a preset starting current value, and a preset starting time.

[0041] Specifically, the open-loop starting current and open-loop starting time corresponding to the preset temperature threshold are the preset starting current value and preset starting time, respectively. The open-loop starting current and open-loop starting time are determined based on the difference between the current ambient temperature and the preset temperature threshold, so as to avoid the open-loop starting current and open-loop starting time being too large or too small, which would affect the compressor starting.

[0042] In some embodiments, the open-loop starting current is calculated according to the following formula (1):

[0043] I = (T - T0) * K + I0 (1)

[0044] Where I is the open-loop starting current, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient, and K < 0, and I0 is the preset starting current value.

[0045] It is understandable that when the current ambient temperature is less than the preset temperature threshold, T-T0 < 0, the preset proportional coefficient K < 0, therefore, (T-T0)*K > 0, and the open-loop starting current I increases; when the current ambient temperature is greater than or equal to the preset temperature threshold, T-T0 ≥ 0, the preset proportional coefficient K < 0, therefore, (T-T0)*K ≤ 0, and the open-loop starting current I remains unchanged or decreases.

[0046] In some embodiments, the open-loop startup time is calculated according to the following formula (2):

[0047] t=(T-T0)*K+t0 (2)

[0048] Where t is the open-loop start-up time, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient, and K < 0, t0 is the preset start-up time.

[0049] It is understandable that when the current ambient temperature is less than the preset temperature threshold, T-T0 < 0, the preset proportional coefficient K < 0, therefore, (T-T0)*K > 0, and the open-loop start-up time t increases; when the current ambient temperature is greater than or equal to the preset temperature threshold, T-T0 ≥ 0, the preset proportional coefficient K < 0, therefore, (T-T0)*K ≤ 0, and the open-loop start-up time t remains unchanged or decreases.

[0050] It should be noted that the preset proportional coefficient K can be calibrated according to the actual situation.

[0051] In one optional implementation, when the open-loop starting current I is less than a preset starting current value I0, the open-loop starting current I is the preset starting current value I0; when the open-loop starting current I is greater than a preset starting current threshold, the open-loop starting current I is the preset starting current threshold. When the open-loop starting time t is less than a preset starting time t0, the open-loop starting time t is the preset starting time t0; when the open-loop starting time t is greater than a preset starting time threshold, the open-loop starting time t is the preset starting time threshold.

[0052] In the above embodiments, linear control is used to determine the open-loop starting current and open-loop starting time, making the open-loop starting current and open-loop starting time more accurate and avoiding excessively large or small open-loop starting current and open-loop starting time, which would affect the normal start-up of the compressor.

[0053] In some embodiments, determining the compressor's open-loop starting current and open-loop starting time based on the current ambient temperature includes: determining the temperature range of the current ambient temperature; and determining the corresponding open-loop starting current and open-loop starting time based on the temperature range of the current ambient temperature, wherein different temperature ranges correspond to different open-loop starting currents and open-loop starting times.

[0054] It is understood that the above embodiments use linear control to determine the open-loop start-up current and open-loop start-up time, while this embodiment uses staged control to determine the open-loop start-up current and open-loop start-up time.

[0055] Specifically, different temperature ranges correspond to different open-loop start-up currents and open-loop start-up times. The open-loop start-up current and open-loop start-up time are determined based on the temperature range of the current environment.

[0056] In some embodiments, when the current ambient temperature is greater than or equal to a first preset temperature, the open-loop starting current is determined to be a first preset current, and the open-loop starting time is determined to be a first preset time; when the current ambient temperature is less than the first preset temperature but greater than or equal to a second preset temperature, the open-loop starting current is determined to be a second preset current, and the open-loop starting time is determined to be a second preset time, wherein the second preset current is greater than the first preset current, and the second preset time is greater than the first preset time; when the current ambient temperature is less than the second preset temperature but greater than or equal to a third preset temperature, the open-loop starting current is determined to be a third preset current, and the open-loop starting time is determined to be a third preset time, wherein the third preset current is greater than the second preset current, and the third preset time is greater than the second preset time; when the current ambient temperature is less than the third preset temperature, the open-loop starting current is determined to be a fourth preset current, and the open-loop starting time is determined to be a fourth preset time, wherein the fourth preset current is greater than the third preset current, and the fourth preset time is greater than the third preset time.

[0057] In other words, the first preset temperature is greater than the second preset temperature, the second preset temperature is greater than the third preset temperature, the first preset current is less than the second preset current, the second preset current is less than the third preset current, the third preset current is less than the fourth preset current, the first preset time is less than the second preset time, the second preset time is less than the third preset time, the third preset time is less than the fourth preset time, and the lower the current ambient temperature, the greater the preset current and preset time.

[0058] In the above embodiments, the open-loop start-up current and open-loop start-up time are determined by stage control. Although stage control is not as precise as linear control, it is simpler and easier to implement.

[0059] S103 controls the compressor to start based on the open-loop starting current during the open-loop start-up time.

[0060] In the above embodiments, the open-loop starting current and open-loop starting time of the compressor are determined based on the current ambient temperature. The open-loop starting current and open-loop starting time are inversely correlated with the current ambient temperature. The open-loop starting current and open-loop starting time of the compressor change with the current ambient temperature, which ensures that the compressor can start normally in a low-temperature environment, while reducing pipeline vibration and starting noise during compressor startup.

[0061] In some embodiments, the open-loop starting current is less than or equal to a preset limiting starting current, and the open-loop starting time is less than or equal to a preset time threshold, wherein the preset limiting starting current is determined based on the compressor's demagnetizing current.

[0062] It should be noted that the preset starting current limit is 90% of the compressor's demagnetizing current. The preset time threshold is generally 60 seconds.

[0063] The technical solution of this application will be further described in detail below with reference to specific implementation methods:

[0064] like Figure 4 As shown, the low-temperature start-up method for the compressor includes the following steps:

[0065] S201 receives the compressor start command.

[0066] S202, detects the current ambient temperature.

[0067] S203, determine whether the current ambient temperature is greater than or equal to the first preset temperature T1. If the current ambient temperature is greater than or equal to the first preset temperature T1, proceed to step S204. If the current ambient temperature is less than the first preset temperature T1, proceed to step S205.

[0068] S204, determine the open-loop starting current as the first preset current I1, and determine the open-loop starting time as the first preset time t1.

[0069] S205, determine whether the current ambient temperature is less than the first preset temperature T1 and greater than or equal to the second preset temperature T2. If the current ambient temperature is less than the first preset temperature T1 and greater than or equal to the second preset temperature T2, then execute step S206. If the current ambient temperature is less than the second preset temperature T2, then execute step S207.

[0070] S206, determine the open-loop starting current as the second preset current I2, and determine the open-loop starting time as the second preset time t2, wherein the second preset current I2 is greater than the first preset current I1, and the second preset time t2 is greater than the first preset time t1.

[0071] S207, determine whether the current ambient temperature is less than the second preset temperature T2 and greater than or equal to the third preset temperature T3. If the current ambient temperature is less than the second preset temperature T2 and greater than or equal to the third preset temperature T3, proceed to step S208. If the current ambient temperature is less than the third preset temperature T3, proceed to step S209.

[0072] S208, determine the open-loop starting current as the third preset current I3, and determine the open-loop starting time as the third preset time t3, wherein the third preset current I3 is greater than the second preset current I2, and the third preset time t3 is greater than the second preset time t2.

[0073] S209, determine the open-loop starting current as the fourth preset current I4, and determine the open-loop starting time as the fourth preset time t4, wherein the fourth preset current I4 is greater than the third preset current I3, and the fourth preset time t4 is greater than the third preset time t3.

[0074] S210 controls the compressor to start based on the open-loop starting current during the open-loop start-up time.

[0075] In this embodiment, a staged control method is adopted. The open-loop starting current and open-loop starting time are determined according to the current ambient temperature. The lower the current ambient temperature, the larger the open-loop starting current and the longer the open-loop starting time, ensuring that the compressor can start normally in low-temperature environments. The higher the current ambient temperature, the smaller the open-loop starting current and the shorter the open-loop starting time, reducing pipeline vibration and starting noise during compressor startup. Furthermore, the staged control method is relatively simple and easy to implement.

[0076] like Figure 5 As shown, the low-temperature start-up method for the compressor includes the following steps:

[0077] S301 receives the compressor start command.

[0078] S302, detects the current ambient temperature.

[0079] S303, based on the current ambient temperature T, preset temperature threshold T0, preset starting current I0 and preset starting time t0, and using formulas (1) and (2), calculate the open-loop starting current and open-loop starting time.

[0080] S304. Determine whether the open-loop starting current is less than the preset starting current value I0. If the open-loop starting current is less than the preset starting current value I0, proceed to step S305. If the open-loop starting current is greater than or equal to the preset starting current value I0, proceed to step S306.

[0081] S305, determine the open-loop starting current to the preset starting current value I0.

[0082] S306, determine whether the open-loop starting current is greater than the preset starting current threshold I4. If the open-loop starting current is greater than the preset starting current threshold I4, proceed to step S307. If the open-loop starting current is less than or equal to the preset starting current threshold I4, proceed to step S308.

[0083] S307, determine the open-loop starting current as the preset starting current threshold I4.

[0084] S308, determine whether the open-loop startup time is less than the preset startup time t0. If the open-loop startup time is less than the preset startup time t0, execute step S309. If the open-loop startup time is greater than or equal to the preset startup time t0, execute step S310.

[0085] S309, determine the open-loop start time as the preset start time t0.

[0086] S310, determine whether the open-loop startup time is greater than the preset startup time threshold t4. If the open-loop startup time is greater than the preset startup time threshold t4, execute step S311. If the open-loop startup time is less than or equal to the preset startup time threshold t4, execute step S312.

[0087] S311, determine the open-loop start time as the preset start time threshold t4.

[0088] S312 controls the compressor to start based on the open-loop starting current during the open-loop start-up time.

[0089] In this embodiment, a linear control method is adopted to determine the open-loop starting current and open-loop starting time based on the current ambient temperature. The lower the current ambient temperature, the larger the open-loop starting current and the longer the open-loop starting time, ensuring that the compressor can start normally in low-temperature environments. The higher the current ambient temperature, the smaller the open-loop starting current and the shorter the open-loop starting time, reducing pipeline vibration and starting noise during compressor startup. Furthermore, the open-loop starting current and open-loop starting time obtained by the linear control method are more accurate, avoiding excessively large or small open-loop starting current and open-loop starting time, which could affect the normal startup of the compressor.

[0090] In summary, according to the low-temperature start-up method of the compressor according to the embodiments of the present invention, the lower the current ambient temperature, the more viscous the compressor oil, the larger the open-loop start-up current of the compressor, and the longer the open-loop start-up time, thus realizing normal start-up of the compressor in a low-temperature environment; and when the current ambient temperature rises, the viscosity of the compressor oil decreases, the open-loop start-up current of the compressor decreases, and the open-loop start-up time is shortened, reducing pipeline vibration and start-up noise during compressor start-up, thereby reducing safety risks.

[0091] Corresponding to the above embodiments, embodiments of the present invention also provide a computer-readable storage medium storing a low-temperature start-up program for a compressor, which, when executed by a processor, implements the low-temperature start-up method for a compressor in any of the foregoing embodiments.

[0092] According to the computer-readable storage medium of the present invention, by executing the computer program of the above-described low-temperature start-up method for the compressor, the open-loop start-up current and open-loop start-up time of the compressor are determined according to the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. The open-loop start-up current and open-loop start-up time of the compressor change with the current ambient temperature, which ensures that the compressor can start normally in a low-temperature environment, while reducing pipeline vibration and start-up noise during compressor start-up.

[0093] Corresponding to the above embodiments, embodiments of the present invention also provide an air conditioner. For example... Figure 6 As shown, the air conditioner 100 includes: a memory 110, a processor 120, and a low-temperature start program for the compressor stored in the memory 110 and executable on the processor 120. When the processor 120 executes the program, it implements the low-temperature start method for the compressor in any of the aforementioned embodiments.

[0094] According to an embodiment of the present invention, the air conditioner executes a computer program for the low-temperature start-up method of the compressor by a processor, and determines the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. The open-loop start-up current and open-loop start-up time of the compressor change with the current ambient temperature, which ensures that the compressor can start normally in a low-temperature environment, while reducing pipeline vibration and start-up noise during compressor start-up.

[0095] Corresponding to the above embodiments, embodiments of the present invention also provide a low-temperature start-up device for a compressor. For example... Figure 7 As shown, the low-temperature start-up device for the compressor includes: a first determining module 10, a second determining module 20, and a control module 30.

[0096] The first determining module 10 is used to determine the current ambient temperature in response to the start command; the second determining module 20 is used to determine the open-loop start current and open-loop start time of the compressor based on the current ambient temperature, wherein the open-loop start current and open-loop start time are inversely correlated with the current ambient temperature; and the control module 30 is used to control the compressor to start according to the open-loop start current during the open-loop start time.

[0097] In some embodiments, the second determining module 20 is further configured to: determine the difference between the current ambient temperature and a preset temperature threshold; and determine the open-loop starting current and the open-loop starting time based on the difference, the preset starting current value, and the preset starting time.

[0098] In some embodiments, the open-loop starting current is calculated according to the following formula: I=(T-T0)*K+I0, where I is the open-loop starting current, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient and K<0, and I0 is the preset starting current value.

[0099] In some embodiments, the open-loop start-up time is calculated according to the following formula: t=(T-T0)*K+t0, where t is the open-loop start-up time, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient and K<0, and t0 is the preset start-up time.

[0100] In some embodiments, the second determining module 20 is further configured to: determine the temperature range of the current ambient temperature; and determine the corresponding open-loop start-up current and open-loop start-up time based on the temperature range of the current ambient temperature, wherein different temperature ranges correspond to different open-loop start-up currents and open-loop start-up times.

[0101] In some embodiments, when the current ambient temperature is greater than or equal to a first preset temperature, the open-loop starting current is determined to be a first preset current, and the open-loop starting time is determined to be a first preset time; when the current ambient temperature is less than the first preset temperature but greater than or equal to a second preset temperature, the open-loop starting current is determined to be a second preset current, and the open-loop starting time is determined to be a second preset time, wherein the second preset current is greater than the first preset current, and the second preset time is greater than the first preset time; when the current ambient temperature is less than the second preset temperature but greater than or equal to a third preset temperature, the open-loop starting current is determined to be a third preset current, and the open-loop starting time is determined to be a third preset time, wherein the third preset current is greater than the second preset current, and the third preset time is greater than the second preset time; when the current ambient temperature is less than the third preset temperature, the open-loop starting current is determined to be a fourth preset current, and the open-loop starting time is determined to be a fourth preset time, wherein the fourth preset current is greater than the third preset current, and the fourth preset time is greater than the third preset time.

[0102] In some embodiments, the open-loop starting current is less than or equal to a preset limiting starting current, and the open-loop starting time is less than or equal to a preset time threshold, wherein the preset limiting starting current is determined based on the compressor's demagnetizing current.

[0103] It should be noted that the specific implementation of the low-temperature start-up device of the compressor in this embodiment corresponds one-to-one with the specific implementation of the low-temperature start-up method of the compressor in the foregoing embodiment of this invention, and will not be repeated here.

[0104] According to an embodiment of the present invention, a low-temperature start-up device for a compressor determines the current ambient temperature in response to a start-up command via a first determining module, and determines the open-loop start-up current and open-loop start-up time of the compressor based on the current ambient temperature via a second determining module. The open-loop start-up current and open-loop start-up time are inversely correlated with the current ambient temperature. Therefore, the lower the current ambient temperature, the more viscous the compressor oil, the greater the open-loop start-up current, and the longer the open-loop start-up time, thus enabling normal compressor start-up in low-temperature environments. Furthermore, when the current ambient temperature rises, the viscosity of the compressor oil decreases, the open-loop start-up current decreases, and the open-loop start-up time shortens, reducing pipeline vibration and start-up noise during compressor start-up, thereby reducing safety risks.

[0105] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0106] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0107] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0108] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0109] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A low temperature starting method of a compressor, characterized by, include: In response to the startup command, determine the current ambient temperature; Based on the current ambient temperature, the open-loop starting current and open-loop starting time of the compressor are determined, wherein the open-loop starting current and open-loop starting time are inversely correlated with the current ambient temperature; During the open-loop start-up time, the compressor is started according to the open-loop start-up current; Based on the current ambient temperature, determine the compressor's open-loop start-up current and open-loop start-up time, including: Determine the difference between the current ambient temperature and the preset temperature threshold; The open-loop starting current and the open-loop starting time are determined based on the difference, the preset starting current value, and the preset starting time.

2. The method according to claim 1, characterized in that, The open-loop starting current is calculated according to the following formula: I = (T - T0) * K + I0 Where I is the open-loop starting current, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient, and K < 0, and I0 is the preset starting current value.

3. The method according to claim 1, characterized in that, The open-loop start-up time is calculated according to the following formula: t = (T - T0) * K + t0 Where t is the open-loop start-up time, T is the current ambient temperature, T0 is the preset temperature threshold, K is the preset proportional coefficient, and K < 0, and t0 is the preset start-up time.

4. The method according to claim 1, characterized in that, Based on the current ambient temperature, determine the compressor's open-loop start-up current and open-loop start-up time, including: Determine the temperature range within which the current ambient temperature falls; Based on the temperature range of the current ambient temperature, the corresponding open-loop start-up current and open-loop start-up time are determined, wherein different temperature ranges correspond to different open-loop start-up currents and open-loop start-up times.

5. The method according to claim 4, characterized in that, When the current ambient temperature is greater than or equal to a first preset temperature, the open-loop start-up current is determined to be the first preset current, and the open-loop start-up time is determined to be the first preset time; When the current ambient temperature is less than a first preset temperature and greater than or equal to a second preset temperature, the open-loop start-up current is determined to be the second preset current, and the open-loop start-up time is determined to be the second preset time, wherein the second preset current is greater than the first preset current, and the second preset time is greater than the first preset time; When the current ambient temperature is less than the second preset temperature and greater than or equal to the third preset temperature, the open-loop start-up current is determined to be the third preset current, and the open-loop start-up time is determined to be the third preset time, wherein the third preset current is greater than the second preset current, and the third preset time is greater than the second preset time; When the current ambient temperature is less than the third preset temperature, the open-loop start-up current is determined to be the fourth preset current, and the open-loop start-up time is determined to be the fourth preset time, wherein the fourth preset current is greater than the third preset current, and the fourth preset time is greater than the third preset time.

6. The method according to any one of claims 1-5, characterized in that, The open-loop starting current is less than or equal to a preset limiting starting current, and the open-loop starting time is less than or equal to a preset time threshold, wherein the preset limiting starting current is determined based on the demagnetizing current of the compressor.

7. A computer-readable storage medium, characterized in that, It stores a low-temperature start-up program for the compressor, which, when executed by the processor, implements the low-temperature start-up method for the compressor according to any one of claims 1-6.

8. An air conditioner, characterized in that, include: A memory, a processor, and a low-temperature start-up program for a compressor stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the low-temperature start-up method for a compressor according to any one of claims 1-6.

9. A low-temperature start-up device for a compressor, characterized in that, include: The first determining module is used to determine the current ambient temperature in response to the start command; The second determining module is used to determine the open-loop starting current and open-loop starting time of the compressor based on the current ambient temperature, wherein the open-loop starting current and open-loop starting time are inversely correlated with the current ambient temperature; The control module is used to control the compressor to start according to the open-loop start-up current during the open-loop start-up time. Based on the current ambient temperature, determine the compressor's open-loop start-up current and open-loop start-up time, including: Determine the difference between the current ambient temperature and the preset temperature threshold; The open-loop starting current and the open-loop starting time are determined based on the difference, the preset starting current value, and the preset starting time.

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