Compressor startup control method, compressor, air conditioner, storage medium and electronic equipment

Abstract

The present invention provides a compressor startup control method, a compressor, an air conditioner, a storage medium and an electronic device, wherein the method comprises: in the first startup phase of the compressor, detecting the real-time current of the compressor; terminating the first startup phase according to the real-time current, and calculating the target switching time of the compressor from the first startup phase to the second startup phase according to the real-time current; and controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching time. The technical problem of excessive impact current during compressor startup switching in the related art is solved, and the failure of circuit breaker tripping when the compressor switches to the second startup phase is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor startup control method, a compressor, an air conditioner, a storage medium and an electronic device. Background Art

[0002] In related technologies, compressors may be started in stages. For example, star-delta starting is a common starting method for compressors such as chillers. This method can effectively reduce the starting impact current when the compressor starts. Currently, the star-delta switching time on chillers is a fixed value. If there is a fluctuation in the power grid or the compressor is started under load, the starting impact current will be too large, causing the circuit breaker to trip, affecting circuit stability and power safety.

[0003] With respect to the above-mentioned problems existing in the related technologies, no efficient and accurate solutions have been found yet. Summary of the invention

[0004] The present invention provides a compressor startup control method, a compressor, an air conditioner, a storage medium and an electronic device to solve the technical problem of excessive impact current when the compressor is started and switched in the related art.

[0005] According to one embodiment of the present invention, a startup control method for a compressor is provided, comprising: in a first startup phase of the compressor, detecting a real-time current of the compressor; terminating the first startup phase according to the real-time current, and calculating a target switching duration for the compressor to switch from the first startup phase to the second startup phase according to the real-time current; and controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration.

[0006] Optionally, terminating the first startup phase according to the real-time current, and calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current includes: determining whether the real-time current is a stable current; if the real-time current is a stable current, terminating the first startup phase, and obtaining the preset safety current of the compressor in the first startup phase; calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current and the preset safety current.

[0007] Optionally, determining whether the real-time current is a stable current includes: obtaining a first real-time current of the compressor at a first time and a second real-time current at a second time in the first startup phase, wherein the real-time current includes the first real-time current and the second real-time current; using the first real-time current and the second real-time current to calculate a current change slope of the compressor in the first startup phase; determining whether the current change slope is less than a preset slope; if the current change slope is less than a preset slope, determining that the real-time current is a stable current.

[0008] Optionally, calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase based on the real-time current and the preset safety current includes: judging whether the real-time current is greater than the preset safety current; if the real-time current is less than or equal to the preset safety current, determining a preset switching time range, and selecting a first target switching time within the switching time range; if the real-time current is greater than the preset safety current, selecting a second target switching time within the switching time range, wherein the first target switching time is greater than the second target switching time, the upper boundary of the switching time range is the maximum switching time, and the lower boundary is the minimum switching time.

[0009] Optionally, selecting the second target switching duration within the switching duration range includes: calculating the current difference between the real-time current and the preset safety current; calculating the initial switching duration based on the current difference and the maximum switching duration; determining whether the initial switching duration is less than the minimum switching duration; if the initial switching duration is greater than or equal to the minimum switching duration, determining the initial switching duration as the second target switching duration.

[0010] Optionally, after determining whether the initial switching duration is less than the minimum switching duration, the method further includes: if the initial switching duration is less than the minimum switching duration, controlling the compressor to stop; calculating the overload amount of the compressor based on the real-time current and the full-load current, wherein the full-load current is the current value of the compressor when it is running at full load in the first startup phase; after the compressor unloads the overload amount, controlling the compressor to enter the first startup phase again.

[0011] Optionally, controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration includes: monitoring the disconnection duration of the main contactor and the star contactor of the compressor; after the disconnection duration reaches the target switching duration, controlling the main contactor and the delta contactor of the compressor to be attracted, wherein the first startup phase is the star startup phase, and the second startup phase is the delta startup phase.

[0012] According to another embodiment of the present invention, a compressor is provided, comprising: a detection module, used to detect the real-time current of the compressor in a first startup phase of the compressor; a calculation module, used to terminate the first startup phase according to the real-time current, and calculate a target switching duration for the compressor to switch from the first startup phase to the second startup phase according to the real-time current; and a control module, used to control the compressor to switch from the first startup phase to the second startup phase based on the target switching duration.

[0013] Optionally, the calculation module includes: a judgment unit, used to judge whether the real-time current is a stable current; a processing unit, used to terminate the first startup phase if the real-time current is a stable current, and obtain the preset safety current of the compressor in the first startup phase; a calculation unit, used to calculate the target switching time of the compressor from the first startup phase to the second startup phase based on the real-time current and the preset safety current.

[0014] Optionally, the judgment unit includes: an acquisition subunit, used to acquire a first real-time current of the compressor at a first time and a second real-time current at a second time in the first startup phase, wherein the real-time current includes the first real-time current and the second real-time current; a calculation subunit, used to calculate the current change slope of the compressor in the first startup phase using the first real-time current and the second real-time current; a judgment subunit, used to judge whether the current change slope is less than a preset slope; and a determination subunit, used to determine that the real-time current is a stable current if the current change slope is less than a preset slope.

[0015] Optionally, the calculation unit includes: a first judgment subunit, used to judge whether the real-time current is greater than the preset safety current; a selection subunit, used to determine a preset switching duration range if the real-time current is less than or equal to the preset safety current, and select a first target switching duration within the switching duration range; if the real-time current is greater than the preset safety current, select a second target switching duration within the switching duration range, wherein the first target switching duration is greater than the second target switching duration, the upper boundary of the switching duration range is the maximum switching duration, and the lower boundary is the minimum switching duration.

[0016] Optionally, the selection subunit is also used to: calculate the current difference between the real-time current and the preset safety current; calculate the initial switching duration based on the current difference and the maximum switching duration; determine whether the initial switching duration is less than the minimum switching duration; if the initial switching duration is greater than or equal to the minimum switching duration, determine the initial switching duration as the second target switching duration.

[0017] Optionally, the selection subunit is also used for: after the second judgment subunit determines whether the initial switching duration is less than the minimum switching duration, if the initial switching duration is less than the minimum switching duration, controlling the compressor to stop; calculating the overload amount of the compressor based on the real-time current and the full-load current, wherein the full-load current is the current value of the compressor when it is running at full load in the first startup phase; after the compressor unloads the overload amount, controlling the compressor to enter the first startup phase again.

[0018] Optionally, the control module includes: a monitoring unit for monitoring the disconnection time of the main contactor and the star contactor of the compressor; a control unit for controlling the main contactor and the delta contactor of the compressor to be attracted after the disconnection time reaches the target switching time, wherein the first starting stage is the star starting stage, and the second starting stage is the delta starting stage.

[0019] According to another embodiment of the present invention, an air conditioner is provided, comprising the compressor described in the above embodiment.

[0020] According to another aspect of an embodiment of the present application, a storage medium is further provided, which includes a stored program, and the above steps are executed when the program is run.

[0021] According to another aspect of an embodiment of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; wherein: the memory is used to store computer programs; and the processor is used to execute the steps in the above method by running the program stored in the memory.

[0022] According to yet another embodiment of the present invention, a storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above-mentioned device embodiments when running.

[0023] Through the embodiments of the present invention, in the first startup phase of the compressor, the real-time current of the compressor is detected; the first startup phase is terminated according to the real-time current, and the target switching time for the compressor to switch from the first startup phase to the second startup phase is calculated according to the real-time current; the compressor is controlled to switch from the first startup phase to the second startup phase based on the target switching time, and the target switching time for switching to the second startup phase is calculated according to the real-time current of the compressor in the first startup phase, thereby achieving flexible switching of the compressor in adjacent startup phases, reducing the impact current caused by long-term startup switching, solving the technical problem of excessive impact current during compressor startup switching in the related art, and avoiding the failure of circuit breaker tripping when the compressor switches to the second startup phase. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 is a hardware structure block diagram of a compressor according to an embodiment of the present invention;

[0026] Figure 2 is a flow chart of a compressor startup control method according to an embodiment of the present invention;

[0027] Figure 3 Schematic diagram of star-delta starting in an embodiment of the present invention;

[0028] Figure 4 is a start-up control flow chart in an embodiment of the present invention;

[0029] Figure 5 It is a structural block diagram of a compressor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application 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 interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Example 1

[0033] The method embodiment provided in the first embodiment of the present application can be executed in a compressor, an air conditioner, a compressor controller or a similar equipment management device. Taking running on a compressor as an example, Figure 1 1 is a hardware structure block diagram of a compressor according to an embodiment of the present invention. Figure 1 As shown, the compressor may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the compressor may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above compressor. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0034] The memory 104 can be used to store compressor programs, for example, software programs and modules of application software, such as a compressor program corresponding to a startup control method of a compressor in an embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the compressor program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the compressor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0035] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by the communication provider of the compressor. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] In this embodiment, a compressor startup control method is provided. Figure 2 is a flow chart of a compressor startup control method according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0037] Step S202, in the first startup phase of the compressor, detecting the real-time current of the compressor;

[0038] Optionally, the compressor may be a compressor that supports phased start, such as a chiller compressor, and the phased start may be star-delta start. The solution of this embodiment may also be applicable to other types of compressors. In addition to compressors, such as compressors that support reduced-voltage start, it may also be applied to other equipment equipped with compressors, such as asynchronous motors.

[0039] Optionally, a current transformer is used to detect the real-time current of the compressor.

[0040] Step S204, terminating the first startup phase according to the real-time current, and calculating a target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current;

[0041] In this embodiment, the second startup stage is a stage after the first startup stage, and the operating voltage of the compressor in the second startup stage is greater than the operating voltage of the compressor in the first startup stage. The second startup stage can be an intermediate stage or a final stage of the compressor startup process. If it is the final stage, the second startup stage is the full-pressure operation stage of the compressor, and the motor works at the rated voltage.

[0042] When the compressor is running in the first starting stage, the compressor is connected to the first starting circuit. Correspondingly, when the compressor is running in the second starting stage, the compressor is connected to the second starting circuit.

[0043] Step S206: Controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration.

[0044] Through the above steps, in the first startup stage of the compressor, the real-time current of the compressor is detected; the first startup stage is terminated according to the real-time current, and the target switching time for the compressor to switch from the first startup stage to the second startup stage is calculated according to the real-time current; the compressor is controlled to switch from the first startup stage to the second startup stage based on the target switching time, and the target switching time for switching to the second startup stage is calculated according to the real-time current of the compressor in the first startup stage, so that the compressor can be flexibly switched in adjacent startup stages, the impact current caused by long-term startup switching is reduced, the technical problem of excessive impact current when the compressor starts switching in the related technology is solved, and the failure of circuit breaker tripping when the compressor switches to the second startup stage is avoided.

[0045] In one implementation of the present embodiment, terminating the first startup phase according to the real-time current, and calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current include: determining whether the real-time current is a stable current; if the real-time current is a stable current, terminating the first startup phase, and obtaining the preset safety current of the compressor in the first startup phase; calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current and the preset safety current.

[0046] The stable current of this embodiment is the voltage after the compressor has completed the boosting. After the compressor starts and enters the first startup stage, the real-time current starts to rise from 0, and the current keeps increasing, and finally stabilizes, reaching 1 / 3~1 / 2 of the full voltage starting current (different compressor models, specifications, and starting circuits may be different).

[0047] The preset safety current of this embodiment is related to the maximum power of the compression type and the starting circuit of the first starting stage, and the preset safety current is the starting safety current of the first starting stage.

[0048] By adopting the solution of this embodiment, after the real-time current of the compressor rises to a stable current, the first startup phase is terminated and the switching phase is entered. At the same time, the target switching duration of the switching phase is calculated. The actual load condition of the compressor can be reflected according to the stable real-time current, and then the target switching duration is calculated based on the actual load condition, thereby improving the accuracy of the target switching duration.

[0049] In one example, determining whether the real-time current is a stable current includes: obtaining a first real-time current of the compressor at a first time and a second real-time current at a second time in the first startup phase, wherein the real-time current includes the first real-time current and the second real-time current; using the first real-time current and the second real-time current to calculate a current change slope of the compressor in the first startup phase; determining whether the current change slope is less than a preset slope; if the current change slope is less than the preset slope, determining that the real-time current is a stable current.

[0050] The judgment condition for the stable operation of the compressor is to detect that the slope of the compressor current change within the △t time is less than X, △t, X are preset slopes, and △t is the judgment period), then start switching, the current is in a state of increasing after the compressor is started, and the current change slope of this embodiment refers to the change value of the current within the △t time. For example, the △t time is set to 2s, the current (first real-time current) is 10A when the compressor is started for 3s, and the current (second real-time current) is 20A when the compressor is started for 5s. Then the current change slope at this time is (20-10) / 2=5. When the compressor tends to be stable, the real-time current fluctuation is small, and the current change slope approaches 0.

[0051] When it is detected that the compressor current change slope within the △t time is less than X, the compressor speed has reached the rated speed and the compressor current has stabilized.

[0052] By adopting the solution of this embodiment, the real-time current of the compressor at different times in the first startup phase is obtained, and then the change slope of the real-time current is used to determine whether the current real-time current is a stable current, thereby achieving accurate judgment of the stability of the real-time current.

[0053] In one implementation of the present embodiment, calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase based on the real-time current and the preset safety current includes: determining whether the real-time current is greater than the preset safety current; if the real-time current is less than or equal to the preset safety current, determining a preset switching time range, and selecting a first target switching time within the switching time range; if the real-time current is greater than the preset safety current, selecting a second target switching time within the switching time range, wherein the first target switching time is greater than the second target switching time, the upper boundary of the switching time range is the maximum switching time, and the lower boundary is the minimum switching time.

[0054] In an example, I1 is the actual current, T2 is the switching time range, which is the allowable range of the target switching time of the compressor during normal startup, I is the preset safety current, Tmin≤T2≤Tmax, Tmin and Tmax are the minimum switching time of the lower boundary and the maximum switching time of the upper boundary, respectively, and Tmin and Tmax are parameters preset in advance.

[0055] Optionally, the first target switching duration is a maximum switching duration in the switching duration range.

[0056] In this implementation scenario, the real-time current I1 of the compressor is positively correlated with the current load of the compressor. If the actual current I1 of the compressor is ≤I, it means that the load of the compressor is light at this time. The target switching time T2 can be set to T2=Tmax, and the second startup phase can be entered after a longer switching phase.

[0057] By adopting the solution of this embodiment, when the real-time current of the compressor is small and the load is light, a longer target switching time is selected; when the real-time current of the compressor is large and the load is heavy, a shorter target switching time is selected. By shortening the switching time between the two starting stages, the starting impact current of the compressor is reduced, thereby improving the safety of the compressor.

[0058] In one implementation scenario, selecting the second target switching duration within the switching duration range includes: calculating the current difference between the real-time current and the preset safety current; calculating the initial switching duration based on the current difference and the maximum switching duration; determining whether the initial switching duration is less than the minimum switching duration; if the initial switching duration is greater than or equal to the minimum switching duration, determining the initial switching duration as the second target switching duration.

[0059] If the actual compressor current I1>I, it means that the compressor load is heavy at this time, and the compressor startup impact current can be reduced by shortening the target switching time.

[0060] Optionally, the initial switching duration is calculated by using the following formula = , where C is a constant coefficient, which is related to compressor parameters, voltage and other factors.

[0061] If the initial switching duration ≥ Tmin, the initial switching duration is determined as the second target switching duration, and the transition durations of the first startup phase and the second startup phase are executed.

[0062] By adopting the solution of this embodiment, the initial switching duration is calculated according to the current difference between the real-time current and the preset safety current, and the initial switching duration within the switching time range is determined as the second target switching duration. The second target switching duration can be flexibly adjusted according to the current difference between the real-time current and the preset safety current. The first startup stage and the second startup stage can be transitioned stably on the basis of reducing the compressor startup impact current, thereby improving the stability of the compressor while ensuring safety.

[0063] In another implementation scenario, after determining whether the initial switching duration is less than the minimum switching duration, it also includes: if the initial switching duration is less than the minimum switching duration, controlling the compressor to stop; calculating the overload amount of the compressor based on the real-time current and the full-load current, wherein the full-load current is the current value of the compressor when it is running at full load in the first startup phase; after the compressor unloads the overload amount, controlling the compressor to enter the first startup phase again.

[0064] In this implementation scenario, if the initial switching time is less than Tmin, the triangle start will not be switched, and the compressor will be controlled to shut down. After the shutdown, the main control board controls the compressor unloading valve to unload and remove the overload.

[0065] In one example, the overload amount is unloaded based on the unloading time, and the unloading time is set to T3, T3= , where I0 is the full load current of the preset compressor running at full load, The current overload of the compressor can be obtained. T4 is the time required to unload each unit load. T4 is preset according to the compressor specifications. After the overload is unloaded after T3 time, the compressor is controlled to start again. In addition, U*I1-U*I0 can also be used to calculate the overload, where U is the rated voltage of the first startup stage and T3= .

[0066] By adopting the solution of this embodiment, when the initial switching time is too short and the load on the compressor is too large, the overload load is calculated and the compressor is restarted after unloading, thereby avoiding overload failure when the compressor starts and preventing the circuit breaker from tripping due to the compressor starting under load.

[0067] In one implementation of the present embodiment, controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration includes: monitoring the disconnection duration of the main contactor and the star contactor of the compressor; after the disconnection duration reaches the target switching duration, controlling the main contactor and the delta contactor of the compressor to be attracted, wherein the first startup phase is the star startup phase, and the second startup phase is the delta startup phase.

[0068] In the implementation scenario of the above embodiment, the first startup phase is a star startup phase, the second startup phase is a delta startup phase, and the switching between the first startup phase and the second startup phase is a star-delta switching.

[0069] Figure 3 It is a schematic diagram of star-delta starting in an embodiment of the present invention. When starting, the main contactor and the star contactor are energized. After time T1, the star contactor is disconnected. This is the first starting stage. After time T2, the delta contactor is closed, the star-delta switching is completed, and the second starting stage is entered. Wherein T1 is the star operation time, and T2 is the star-delta switching time; T1 and T2 are both variable values. When the compressor star operation is stable, the delta switching begins. The T1 time is the period from the star contactor energizing to the star contactor disconnecting. The star contactor energizing condition is the unit starting, and the star contactor disconnecting condition is that the current change slope is less than X; the T2 time is the period from the star contactor disconnecting to the delta contactor energizing, and T2 changes according to the set conditions.

[0070] By adopting the solution of this embodiment, the star-delta switching time of the compressor is adjusted during star-delta starting, which can prevent the compressor from tripping due to excessive impact current during star-delta starting.

[0071] Figure 4 1 is a start-up control flow chart in an embodiment of the present invention. Taking the first start-up stage as the star start-up stage and the second start-up stage as the delta start-up stage as an example, after the unit obtains the start-up command, the unit satisfies the start-up conditions and performs star start-up. After the compressor star operation is stable; if the actual current of the compressor I1≤I, it means that the compressor load is light at this time, then the star-delta switching time T2 is set to T2=Tmax, and then the compressor performs star-delta switching; if the actual current of the compressor I1>I, it means that the compressor load is heavy at this time, then the compressor startup impact current can be reduced by shortening the star-delta switching time. At this time, the star-delta switching time T2 is set to T2= ; If T2 ≥ Tmin, the triangle switching start is performed; if T2 < Tmin, the triangle switching start is not performed, and the compressor is controlled to stop processing; after the shutdown, the main control board controls the compressor unloading valve to unload, and the unloading time is set to T3, T3 = , (where I0 is the preset compressor full load star operation current value, The current compressor load size can be obtained, T4 is the time value required to unload each unit load, which is set according to the compressor specifications and models). After unloading for T3 time, the compressor is controlled to start again.

[0072] The solution of this embodiment provides a control method for star-delta starting of a chiller, which can adjust the star operation time and star-delta switching time of the star-delta starting according to the current state of the compressor, and prevent the problem of excessive impact current causing tripping when the compressor is started by detecting the star operation current. At the same time, the compressor unloading and restarting time are controlled according to the star operation current.

[0073] The solution of this embodiment solves the problem that the star-delta start time cannot be adjusted and the problem that the compressor star-delta start causes the circuit breaker to trip when the power grid fluctuates. It can also solve the problem that the compressor starts with load and causes the circuit breaker to trip. The star-delta start time is adjustable. The compressor unit and the load are protected.

[0074] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a compressor, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0075] Example 2

[0076] In this embodiment, a compressor and an air conditioner are also provided, and the device is used to implement the above-mentioned embodiment and preferred implementation mode, and the descriptions that have been made are not repeated. As used below, the term "module" can implement a combination of software and hardware of the reservation function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, can also be conceived.

[0077] Figure 5 is a structural block diagram of a compressor according to an embodiment of the present invention, such as Figure 5 As shown, the compressor comprises:

[0078] The detection module 50 is used to detect the real-time current of the compressor in the first startup phase of the compressor;

[0079] a calculation module 52, configured to terminate the first startup phase according to the real-time current, and calculate a target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current;

[0080] The control module 54 is configured to control the compressor to switch from the first startup phase to the second startup phase based on the target switching duration.

[0081] Optionally, the calculation module includes: a judgment unit, used to judge whether the real-time current is a stable current; a processing unit, used to terminate the first startup phase if the real-time current is a stable current, and obtain the preset safety current of the compressor in the first startup phase; a calculation unit, used to calculate the target switching time of the compressor from the first startup phase to the second startup phase based on the real-time current and the preset safety current.

[0082] Optionally, the judgment unit includes: an acquisition subunit, used to acquire a first real-time current of the compressor at a first time and a second real-time current at a second time in the first startup phase, wherein the real-time current includes the first real-time current and the second real-time current; a calculation subunit, used to calculate the current change slope of the compressor in the first startup phase using the first real-time current and the second real-time current; a judgment subunit, used to judge whether the current change slope is less than a preset slope; and a determination subunit, used to determine that the real-time current is a stable current if the current change slope is less than a preset slope.

[0083] Optionally, the calculation unit includes: a first judgment subunit, used to judge whether the real-time current is greater than the preset safety current; a selection subunit, used to determine a preset switching duration range if the real-time current is less than or equal to the preset safety current, and select a first target switching duration within the switching duration range; if the real-time current is greater than the preset safety current, select a second target switching duration within the switching duration range, wherein the first target switching duration is greater than the second target switching duration, the upper boundary of the switching duration range is the maximum switching duration, and the lower boundary is the minimum switching duration.

[0084] Optionally, the selection subunit is also used to: calculate the current difference between the real-time current and the preset safety current; calculate the initial switching duration based on the current difference and the maximum switching duration; determine whether the initial switching duration is less than the minimum switching duration; if the initial switching duration is greater than or equal to the minimum switching duration, determine the initial switching duration as the second target switching duration.

[0085] Optionally, the selection subunit is also used for: after the second judgment subunit determines whether the initial switching duration is less than the minimum switching duration, if the initial switching duration is less than the minimum switching duration, controlling the compressor to stop; calculating the overload amount of the compressor based on the real-time current and the full-load current, wherein the full-load current is the current value of the compressor when it is running at full load in the first startup phase; after the compressor unloads the overload amount, controlling the compressor to enter the first startup phase again.

[0086] Optionally, the control module includes: a monitoring unit for monitoring the disconnection time of the main contactor and the star contactor of the compressor; a control unit for controlling the main contactor and the delta contactor of the compressor to be attracted after the disconnection time reaches the target switching time, wherein the first starting stage is the star starting stage, and the second starting stage is the delta starting stage.

[0087] This embodiment further provides an air conditioner, which includes the compressor described in the above embodiment. In addition to air conditioners, the solution of this embodiment can also be applied to any electrical equipment including a compressor.

[0088] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0089] Example 3

[0090] An embodiment of the present invention further provides a storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0091] Optionally, in this embodiment, the above storage medium may be configured to store a computer program for executing:

[0092] S1, in the first startup phase of the compressor, detecting the real-time current of the compressor;

[0093] S2, terminating the first startup phase according to the real-time current, and calculating a target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current;

[0094] S3: Controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration.

[0095] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

[0096] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0097] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0098] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0099] S1, in the first startup phase of the compressor, detecting the real-time current of the compressor;

[0100] S2, terminating the first startup phase according to the real-time current, and calculating a target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current;

[0101] S3: Controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration.

[0102] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0103] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0104] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0105] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0106] 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 solution of this embodiment.

[0107] In addition, each functional unit in each embodiment of the present application 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.

[0108] 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 computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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 a number of instructions to enable a computer device (which can be a personal computer, controller or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., various media that can store program codes.

[0109] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A compressor startup control method, characterized in that: include: In a first startup phase of the compressor, detecting a real-time current of the compressor; Determining whether the real-time current is a stable current; If the real-time current is a stable current, the first startup phase is terminated, and a preset safety current of the compressor in the first startup phase is obtained; Calculating a target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current and the preset safety current; Controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration; Among them, calculating the target switching time for the compressor to switch from the first starting stage to the second starting stage based on the real-time current and the preset safety current includes: judging whether the real-time current is greater than the preset safety current; if the real-time current is greater than the preset safety current, selecting a second target switching time in a preset switching time range, the upper boundary of the switching time range being the maximum switching time, and the lower boundary being the minimum switching time; wherein selecting the second target switching time in the preset switching time range includes: calculating the current difference between the real-time current and the preset safety current; calculating the initial switching time based on the current difference and the maximum switching time; judging whether the initial switching time is less than the minimum switching time; if the initial switching time is greater than or equal to the minimum switching time, determining the initial switching time as the second target switching time.

2. The method according to claim 1, characterized in that Determining whether the real-time current is a stable current includes: Acquire a first real-time current of the compressor at a first time and a second real-time current at a second time in the first startup phase, wherein the real-time current includes the first real-time current and the second real-time current; Calculating a current change slope of the compressor in the first startup phase by using the first real-time current and the second real-time current; Determining whether the current change slope is less than a preset slope; If the current change slope is less than a preset slope, it is determined that the real-time current is a stable current.

3. The method according to claim 1, characterized in that: Calculating the target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current and the preset safety current includes: Determining whether the real-time current is greater than the preset safety current; If the real-time current is less than or equal to the preset safety current, a first target switching duration is selected from the switching duration range; wherein the first target switching duration is greater than the second target switching duration.

4. The method according to claim 1, characterized in that: After determining whether the initial switching duration is less than the minimum switching duration, the method further includes: If the initial switching time is less than the minimum switching time, controlling the compressor to stop; Calculating the overload amount of the compressor according to the real-time current and the full-load current, wherein the full-load current is the current value of the compressor when it runs at full load in the first startup phase; After the compressor unloads the overload amount, the compressor is controlled to enter the first startup phase again.

5. The method according to claim 1, characterized in that Controlling the compressor to switch from the first startup phase to the second startup phase based on the target switching duration includes: Monitoring the disconnection time of the main contactor and the star contactor of the compressor; After the disconnection time reaches the target switching time, the main contactor and the delta contactor of the compressor are controlled to be attracted, wherein the first starting stage is the star starting stage, and the second starting stage is the delta starting stage.

6. A compressor, characterized in that: The compressor comprises: A detection module, used for detecting the real-time current of the compressor in the first startup phase of the compressor; a judging unit, configured to judge whether the real-time current is a stable current; a processing unit, configured to terminate the first startup phase if the real-time current is a stable current, and obtain a preset safety current of the compressor in the first startup phase; a calculating unit, configured to calculate a target switching time for the compressor to switch from the first startup phase to the second startup phase according to the real-time current and the preset safety current; A control module, configured to control the compressor to switch from the first startup phase to the second startup phase based on the target switching duration; Wherein, the calculation unit includes: a first judgment subunit, used to judge whether the real-time current is greater than the preset safety current; a selection subunit, used to select a second target switching duration in a preset switching duration range if the real-time current is greater than the preset safety current, the upper boundary of the switching duration range is the maximum switching duration, and the lower boundary is the minimum switching duration; wherein the selection subunit is also used to: calculate the current difference between the real-time current and the preset safety current; calculate the initial switching duration according to the current difference and the maximum switching duration; judge whether the initial switching duration is less than the minimum switching duration; if the initial switching duration is greater than or equal to the minimum switching duration, determine the initial switching duration as the second target switching duration.

7. An air conditioner, characterized in that: The air conditioner includes the compressor according to claim 6.

8. A storage medium, characterized in that: A computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the compressor startup control method according to any one of claims 1 to 5 when running.

9. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface, and the memory communicate with each other via a communication bus; wherein: Memory, used to store computer programs; A processor, configured to execute the steps of the compressor startup control method according to any one of claims 1 to 5 by running a program stored in a memory.

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