Disclosure of Invention
The invention provides a frequency adjusting method and device for a heat pump frequency conversion unit, and solves the technical problem that in the prior art, due to the lack of flexibility in voltage protection value setting, the use safety of a user is reduced.
The invention provides a frequency adjusting method of a heat pump frequency conversion unit, which comprises the following steps:
acquiring an input voltage value of a heat pump frequency conversion unit according to a preset period;
calculating a fluctuation amplitude of the input voltage value when the input voltage value fluctuates within a first predetermined period of time;
adjusting the operating frequency of the heat pump frequency conversion unit at the current moment according to a first adjustment rate corresponding to the fluctuation amplitude;
and if the fluctuation rate of the input voltage value in a second preset time period is smaller than the rate threshold corresponding to the fluctuation amplitude, the operating frequency is adjusted back according to a preset second adjustment rate.
Optionally, the step of calculating the fluctuation amplitude of the input voltage value when the input voltage value fluctuates within a first predetermined time period includes:
when the input voltage value fluctuates in a first preset time period, acquiring the maximum voltage value and the minimum voltage value of the input voltage value in the first preset time period;
and calculating the difference value of the maximum voltage value and the minimum voltage value as the fluctuation amplitude of the input voltage value in a first preset time period.
Optionally, the step of adjusting the current operating frequency of the heat pump frequency converter set according to the first adjustment rate corresponding to the fluctuation amplitude includes:
determining a target fluctuation interval in which the fluctuation amplitude is located according to a matching result of the fluctuation amplitude and a plurality of preset fluctuation intervals;
acquiring a first adjustment rate corresponding to the target fluctuation interval;
and adjusting the current operating frequency of the heat pump frequency conversion unit at the current moment by adopting the first adjustment rate until the operating frequency is adjusted to the lowest frequency value corresponding to the target fluctuation interval.
Optionally, if the fluctuation rate of the input voltage value in the second predetermined period of time is smaller than the rate threshold corresponding to the fluctuation amplitude, the step of adjusting back the operating frequency according to a preset second adjustment rate includes:
if the fluctuation rate of the input voltage value in a second preset time period is smaller than the rate threshold value corresponding to the fluctuation amplitude, stopping adjusting the operating frequency of the heat pump frequency conversion unit according to the first adjustment rate; the speed threshold corresponding to the fluctuation amplitude is the minimum interval value of the target fluctuation interval;
and the operating frequency is adjusted back according to a preset second adjusting rate until the operating frequency at the current moment is adjusted.
Optionally, before the step of acquiring the input voltage value of the heat pump inverter group according to the predetermined period, the method further includes:
when the heat pump frequency conversion unit is electrified, acquiring the input voltage value in real time;
determining a preset input voltage interval according to the change trend of the input voltage value in a third preset time period;
and adjusting the operating frequency to a target operating frequency corresponding to the preset input voltage interval, and starting the heat pump frequency conversion unit.
The invention also provides a frequency adjusting device of the heat pump frequency conversion unit, which comprises:
the input voltage value acquisition module is used for acquiring the input voltage value of the heat pump frequency conversion unit according to a preset period;
the fluctuation amplitude calculation module is used for calculating the fluctuation amplitude of the input voltage value when the input voltage value fluctuates in a first preset time period;
the operation frequency adjusting module is used for adjusting the operation frequency of the heat pump frequency conversion unit at the current moment according to a first adjusting rate corresponding to the fluctuation amplitude;
and the operation frequency callback module is used for calling back the operation frequency according to a preset second adjustment rate if the fluctuation rate of the input voltage value in a second preset time period is smaller than the rate threshold corresponding to the fluctuation amplitude.
Optionally, the fluctuation amplitude calculation module includes:
the voltage maximum value acquisition submodule is used for acquiring the voltage maximum value and the voltage minimum value of the input voltage value in a first preset time period when the input voltage value fluctuates in the first preset time period;
and the amplitude calculation submodule is used for calculating the difference value of the maximum voltage value and the minimum voltage value as the fluctuation amplitude of the input voltage value in a first preset time period.
Optionally, the operating frequency adjusting module includes:
the target fluctuation interval determining submodule is used for determining a target fluctuation interval where the fluctuation amplitude is located according to the matching result of the fluctuation amplitude and a plurality of preset fluctuation intervals;
the first rate obtaining submodule is used for obtaining a first adjusting rate corresponding to the target fluctuation interval;
and the frequency adjusting submodule is used for adjusting the current operating frequency of the heat pump frequency conversion unit at the first adjusting rate until the operating frequency is adjusted to the lowest frequency value corresponding to the target fluctuation interval.
Optionally, the operating frequency callback module includes:
a stopping adjustment submodule, configured to stop adjusting the operating frequency of the heat pump frequency conversion unit according to the first adjustment rate if a fluctuation rate of the input voltage value in a second predetermined period is smaller than a rate threshold corresponding to the fluctuation amplitude; the speed threshold corresponding to the fluctuation amplitude is the minimum interval value of the target fluctuation interval;
and the call-back submodule is used for calling back the operating frequency according to a preset second adjustment rate until the operating frequency at the current moment is adjusted.
Optionally, the apparatus further comprises:
the real-time voltage value acquisition module is used for acquiring the input voltage value in real time when the heat pump frequency conversion unit is electrified;
the input voltage interval determining module is used for determining a preset input voltage interval according to the change trend of the input voltage value in a third preset time period;
and the target operating frequency adjusting module is used for adjusting the operating frequency to a target operating frequency corresponding to the preset input voltage interval and starting the heat pump frequency conversion unit.
According to the technical scheme, the invention has the following advantages:
the invention can collect the input voltage value of the heat pump frequency conversion unit according to the preset period, if the input voltage value has voltage fluctuation in the first preset period, the fluctuation amplitude of the voltage fluctuation can be calculated by adopting the input voltage value collected in the first preset period, the operating frequency of the heat pump frequency conversion unit at the current moment is gradually adjusted according to the first adjusting rate corresponding to the fluctuation amplitude, meanwhile, the input voltage value is continuously collected, if the fluctuation rate of the input voltage value in the second preset period is less than the rate threshold corresponding to the fluctuation amplitude, the adjusted operating frequency can be adjusted back according to the second adjusting rate, so as to solve the technical problem of sudden shutdown caused by that the traditional heat pump frequency conversion unit only sets a fixed voltage value, and reduce the problem of fault rate rise of the heat pump frequency conversion unit due to unstable voltage shutdown, the service life of the equipment is prolonged.
Detailed Description
The embodiment of the invention provides a frequency adjusting method and device for a heat pump frequency conversion unit, which are used for solving the technical problem that in the prior art, the use safety of a user is reduced due to the lack of flexibility in voltage protection value setting.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for adjusting a frequency of a heat pump inverter set according to an embodiment of the present invention.
The invention provides a frequency adjusting method of a heat pump frequency conversion unit, which comprises the following steps:
step 101, collecting an input voltage value of a heat pump frequency conversion unit according to a preset period;
the heat pump frequency conversion unit is a unit which mainly comprises a refrigeration compressor, a condenser, an air cooler, an electromagnetic valve, a frequency converter and the like, and is additionally provided with an oil separator, a liquid storage barrel, an oil sight glass, a diaphragm type hand valve, an air return filter and the like.
In the embodiment of the invention, in order to accurately monitor the voltage fluctuation of the heat pump frequency conversion unit, the input voltage value of the heat pump frequency conversion unit can be acquired according to a preset period.
Step 102, when the input voltage value fluctuates in a first preset time period, calculating the fluctuation amplitude of the input voltage value;
when the input voltage value is detected to fluctuate within the first preset time period, which indicates that the input voltage is unstable at the moment and may cause the shutdown of the heat pump frequency conversion unit, the fluctuation amplitude of the input voltage value within the first preset time period can be calculated based on the input voltage value collected within the first preset time period.
In order to reduce the false determination probability while ensuring higher accuracy, the first predetermined period may be set to be an integral multiple of the predetermined period, for example, the first predetermined period may be set to 1s, and the predetermined period is set to 1 ms.
103, adjusting the current operating frequency of the heat pump frequency conversion unit according to a first adjustment rate corresponding to the fluctuation amplitude;
in the embodiment of the invention, each fluctuation amplitude value can be associated with a first adjustment rate, and after the fluctuation amplitude value of the input voltage value in a first preset time period is obtained through calculation, the current operating frequency of the heat pump frequency conversion unit can be adjusted according to the first adjustment rate corresponding to the fluctuation amplitude value, so that the heat pump frequency conversion unit can be maintained to operate under the condition of unstable voltage.
And 104, if the fluctuation rate of the input voltage value in the second preset time period is less than the rate threshold corresponding to the fluctuation amplitude, adjusting back the operating frequency according to a preset second adjustment rate.
And when the operating frequency of the heat pump frequency conversion unit is adjusted, the input voltage value is continuously obtained according to a preset period so as to ensure the real-time adjustment of the operating frequency. Further, when a plurality of input voltage values of the second predetermined period of time are acquired, the calculation of the fluctuation rate of the input voltage values within the second predetermined period of time may be performed with the plurality of input voltage values and the second predetermined period of time. If the fluctuation rate is smaller than the rate threshold corresponding to the fluctuation amplitude, it is indicated that the voltage at the moment is stable, and at the moment, the operation frequency can be adjusted back according to a preset second adjustment rate, so as to recover the operation state of the heat pump frequency conversion unit before the adjustment of the first adjustment rate.
The second predetermined period is an integral multiple of the first predetermined period, for example, the first predetermined period is 1s, and the second predetermined period is 10 minutes, which is not limited in this embodiment of the present invention.
In the embodiment of the invention, the input voltage value of the heat pump frequency converter set can be collected according to a preset period, if the input voltage value has voltage fluctuation in a first preset period, the fluctuation amplitude of the voltage fluctuation can be calculated by adopting the input voltage value collected in the first preset period, the operating frequency of the heat pump frequency converter set at the current moment is gradually adjusted according to a first adjusting rate corresponding to the fluctuation amplitude, meanwhile, the input voltage value is continuously collected, if the fluctuation rate of the input voltage value in a second preset period is smaller than a rate threshold corresponding to the fluctuation amplitude, the adjusted operating frequency can be adjusted back according to a second adjusting rate, so that the technical problem of sudden shutdown caused by the fact that the traditional heat pump frequency converter set is only provided with a fixed voltage value is solved, and the problem of fault rate rise caused by the shutdown of the heat pump frequency converter set due to unstable voltage is reduced, the service life of the equipment is prolonged.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for adjusting a frequency of a heat pump inverter set according to a second embodiment of the present invention.
The invention provides a frequency adjusting method of a heat pump frequency conversion unit, which comprises the following steps:
step 201, collecting an input voltage value of a heat pump frequency conversion unit according to a preset period;
the heat pump frequency conversion unit is a unit which mainly comprises a refrigeration compressor, a condenser, an air cooler, an electromagnetic valve, a frequency converter and the like, and is additionally provided with an oil separator, a liquid storage barrel, an oil sight glass, a diaphragm type hand valve, an air return filter and the like.
In the embodiment of the invention, in order to accurately monitor the voltage fluctuation of the heat pump frequency conversion unit, the input voltage value of the heat pump frequency conversion unit can be acquired according to a preset period.
The predetermined period may be set to 1ms or 0.5ms, and may be specifically set according to an actual situation, which is not limited in this embodiment of the present invention.
Optionally, before step 201, the method may further comprise the following steps S11-S13:
s11, when the heat pump frequency conversion unit is electrified, acquiring an input voltage value in real time;
s12, determining a preset input voltage interval according to the change trend of the input voltage value in a third preset time period;
and S13, adjusting the operating frequency to a target operating frequency corresponding to the preset input voltage interval, and starting the heat pump frequency conversion unit.
In the specific implementation, when the heat pump frequency conversion unit is powered on, for example, when an air conditioner is powered on, the input voltage value can be obtained in real time at the moment due to different variation trends of the input voltage value during access; determining a preset input voltage interval in which the input voltage value is positioned according to the change trend of the input voltage value in the third preset time period and the voltage stabilization value when the input voltage value is stable; and finally, adjusting the operating frequency of the heat pump frequency conversion unit to a target operating frequency corresponding to the preset input voltage interval.
The third predetermined period refers to a period from unstable input voltage to stable input voltage, and there may be a plurality of preset input voltage intervals.
If the variation trend of the input voltage value in the third predetermined period of time is an increasing trend, the corresponding relationship between the input voltage value and the target operating frequency of the preset input voltage interval may be as shown in table 1 below:
TABLE 1
If the variation trend of the input voltage value in the third predetermined period is a decreasing trend, the corresponding relationship between the input voltage value and the target operating frequency of the preset input voltage interval may be as shown in table 2 below:
presetting an input voltage interval
|
Highest frequency of refrigeration (Hz)
|
Heating highest frequency (Hz)
|
265V < input voltage
|
0
|
0
|
Input voltage is more than 255V and less than or equal to 265V
|
50
|
55
|
245V < input voltage ≤ 255V
|
65
|
70
|
Input voltage is more than 235V and less than or equal to 245V
|
80
|
85
|
Input voltage is more than 195V and less than or equal to 235V
|
95
|
100
|
Input voltage is more than 185V and less than or equal to 195V
|
95
|
100
|
Input voltage is more than 175V and less than or equal to 185V
|
75
|
80
|
Input voltage is more than 165V and less than or equal to 175V
|
60
|
65
|
Input voltage is more than 155V and less than or equal to 165V
|
45
|
50
|
145V < input voltage ≤ 155V
|
40
|
45
|
Input voltage is less than or equal to 145V
|
0
|
0 |
TABLE 2
Step 202, when the input voltage value fluctuates in a first preset time period, calculating the fluctuation amplitude of the input voltage value;
optionally, step 202 may include the following sub-steps S21-S22:
s21, when the input voltage value fluctuates in the first preset time period, acquiring the maximum voltage value and the minimum voltage value of the input voltage value in the first preset time period;
and S22, calculating the difference value of the maximum voltage value and the minimum voltage value as the fluctuation amplitude of the input voltage value in the first preset time period.
In the embodiment of the invention, if the input voltage value fluctuates in the first preset time period, the maximum voltage value and the minimum voltage value of the input voltage value in the first preset time period can be obtained, and then the difference value between the maximum voltage value and the minimum voltage value is calculated to be used as the fluctuation amplitude of the input voltage value in the first preset time period, so as to provide a data basis for subsequent operation frequency adjustment.
Step 203, determining a target fluctuation interval where the fluctuation amplitude is located according to the matching result of the fluctuation amplitude and a plurality of preset fluctuation intervals;
in the embodiment of the present invention, after the fluctuation amplitude within the first predetermined time period is obtained through calculation, the target fluctuation interval in which the fluctuation amplitude is located may be determined according to the result of matching the fluctuation amplitude with a plurality of preset fluctuation intervals.
It should be noted that the preset fluctuation interval may include, but is not limited to, (0, 5], (5, 10], (10, 15], (15, 20], and (20, + ∞), etc.
Step 204, acquiring a first adjustment rate corresponding to a target fluctuation interval;
in a specific implementation, different fluctuation intervals respectively correspond to different first adjustment rates, and after a target fluctuation interval is determined, the corresponding first adjustment rate may be obtained based on the target fluctuation interval.
For example, in the case where the fluctuation amplitude is 9, the target fluctuation interval is (5, 10), and at this time, the first adjustment rate 1Hz/s corresponding to (5, 10) may be obtained.
Step 205, adjusting the current operating frequency of the heat pump frequency conversion unit at the first adjustment rate until the operating frequency is adjusted to the lowest frequency value corresponding to the target fluctuation interval;
in the embodiment of the invention, after the first adjustment rate is obtained, the operation frequency of the heat pump frequency conversion unit at the current moment can be adjusted by adopting the first adjustment rate until the operation frequency is adjusted to the lowest frequency value corresponding to the target fluctuation interval.
It is worth mentioning that the correspondence relationship among the fluctuation interval, the first adjustment rate and the frequency minimum value is as follows
Shown in Table 3:
TABLE 3
Taking the refrigeration mode of the heat pump frequency conversion unit as an example, when the sudden change of the input voltage is more than or equal to 5V within 1S, the operating frequency of the heat pump frequency conversion unit is reduced to the original frequency of-5 Hz at the rate of 1Hz/S, and is reduced to 60Hz at the lowest.
And step 206, if the fluctuation rate of the input voltage value in the second preset time period is smaller than the rate threshold corresponding to the fluctuation amplitude, the operating frequency is adjusted back according to a preset second adjustment rate.
Further, step 206 may include the following sub-steps S31-S32:
s31, if the fluctuation rate of the input voltage value in the second preset time period is smaller than the rate threshold value corresponding to the fluctuation amplitude, stopping adjusting the operating frequency of the heat pump frequency conversion unit according to the first adjustment rate; wherein, the rate threshold value corresponding to the fluctuation amplitude is the interval minimum value of the target fluctuation interval;
and S32, calling back the operation frequency according to a preset second adjustment rate until the operation frequency is adjusted to the current operation frequency.
In one example of the present invention, it is possible to continue to acquire the input voltage value at a predetermined cycle and calculate the fluctuation rate using the entire input voltage value and the second predetermined period when the predetermined cycle satisfies the second predetermined period. At this time, if the fluctuation rate is smaller than the rate threshold corresponding to the fluctuation amplitude, the operation frequency of the heat pump frequency conversion unit can be stopped being adjusted by adopting the first adjustment rate, and then the operation frequency can be adjusted back according to the preset second adjustment rate until the operation frequency is adjusted to the initial state.
The velocity threshold corresponding to the fluctuation amplitude is the minimum interval value of the target fluctuation interval, for example, if the fluctuation amplitude is 9, the target fluctuation interval is (5, 10), and the velocity threshold is 5V/s.
In the embodiment of the invention, the input voltage value of the heat pump frequency converter set can be collected according to a preset period, if the input voltage value has voltage fluctuation in a first preset period, the fluctuation amplitude of the voltage fluctuation can be calculated by adopting the input voltage value collected in the first preset period, the operating frequency of the heat pump frequency converter set at the current moment is gradually adjusted according to a first adjusting rate corresponding to the fluctuation amplitude, meanwhile, the input voltage value is continuously collected, if the fluctuation rate of the input voltage value in a second preset period is smaller than a rate threshold corresponding to the fluctuation amplitude, the adjusted operating frequency can be adjusted back according to a second adjusting rate, so that the technical problem of sudden shutdown caused by the fact that the traditional heat pump frequency converter set is only provided with a fixed voltage value is solved, and the problem of fault rate rise caused by the shutdown of the heat pump frequency converter set due to unstable voltage is reduced, the service life of the equipment is prolonged.
As shown in fig. 3, fig. 3 is a flowchart illustrating steps of a frequency adjustment method for a heat pump inverter unit according to a third embodiment of the present invention;
1) acquiring an input voltage value of the heat pump frequency conversion unit every 10 ms;
2) calculating the difference value of the maximum voltage value and the minimum voltage value of the input voltage in every 1s as a fluctuation amplitude value;
3) if the fluctuation amplitude is less than 5V, the frequency of the heat pump frequency conversion unit is not adjusted; if the fluctuation amplitude is less than 10V and less than or equal to 5V, downloading the data to the running frequency of-5 Hz according to a first adjusting rate of 1Hz/s, wherein the lowest value can refer to a table 3; if the voltage is not suddenly changed within 10 minutes and is more than or equal to 5V/s, canceling the voltage fluctuation frequency limitation, and then recovering the previous state at the rate of 1 Hz/s;
4) if the fluctuation amplitude is less than or equal to 10V and less than 15V, downloading the voltage to the running frequency of-10 Hz according to a first adjusting rate of 2Hz/s, wherein the lowest value can refer to the table 3, and if the voltage does not suddenly change within 10 minutes and is more than or equal to 10V/s, canceling the voltage fluctuation frequency limitation, and then recovering the previous state at the rate of 1 Hz/s;
5) if the fluctuation amplitude is less than or equal to 15V and less than 20V, downloading the voltage to the running frequency of-30 Hz at a first adjusting rate of 5Hz/s, wherein the lowest value can refer to the table 3, and if the voltage does not suddenly change within 10 minutes and is more than or equal to 15V/s, canceling the voltage fluctuation frequency limitation, and then recovering the previous state at the rate of 1 Hz/s;
6) if the fluctuation amplitude is less than or equal to 20V, downloading the voltage to the running frequency of-5 Hz at a first regulation rate of 7Hz/s, wherein the lowest value can refer to the table 3, and if the voltage does not suddenly change within 10 minutes and is more than or equal to 20V/s, canceling the voltage fluctuation frequency limitation, and then recovering the previous state at the rate of 1 Hz/s.
The voltage fluctuation frequency limitation refers to a process of gradually adjusting the operating frequency of the heat pump frequency conversion unit at the current moment according to a first adjustment rate corresponding to the fluctuation amplitude.
Referring to fig. 4, fig. 4 is a block diagram of a frequency adjustment device of a heat pump frequency converter set according to a fourth embodiment of the present invention.
The embodiment of the invention provides a frequency adjusting device of a heat pump frequency conversion unit, which comprises:
the input voltage value acquisition module 401 is used for acquiring an input voltage value of the heat pump frequency conversion unit according to a preset period;
a fluctuation amplitude calculation module 402, configured to calculate a fluctuation amplitude of the input voltage value when the input voltage value fluctuates within a first predetermined time period;
the operating frequency adjusting module 403 is configured to adjust the operating frequency of the heat pump frequency conversion unit at the current moment according to a first adjustment rate corresponding to the fluctuation amplitude;
and an operation frequency callback module 404, configured to, if the fluctuation rate of the input voltage value in the second predetermined time period is smaller than the rate threshold corresponding to the fluctuation amplitude, callback the operation frequency according to a preset second adjustment rate.
Optionally, the fluctuation amplitude calculation module 402 includes:
the voltage maximum value acquisition submodule is used for acquiring the voltage maximum value and the voltage minimum value of the input voltage value in a first preset time period when the input voltage value fluctuates in the first preset time period;
and the amplitude calculation submodule is used for calculating the difference value of the maximum voltage value and the minimum voltage value as the fluctuation amplitude of the input voltage value in the first preset time period.
Optionally, the operation frequency adjusting module 403 includes:
the target fluctuation interval determining submodule is used for determining a target fluctuation interval where the fluctuation amplitude is located according to the matching result of the fluctuation amplitude and a plurality of preset fluctuation intervals;
the first rate obtaining submodule is used for obtaining a first adjusting rate corresponding to the target fluctuation interval;
and the frequency adjusting submodule is used for adjusting the current operating frequency of the heat pump frequency conversion unit at the first adjusting rate until the operating frequency is adjusted to the lowest frequency value corresponding to the target fluctuation interval.
Optionally, the running frequency callback module 404 includes:
the stopping adjustment submodule is used for stopping adjusting the operation frequency of the heat pump frequency conversion unit according to the first adjustment rate if the fluctuation rate of the input voltage value in the second preset time period is smaller than the rate threshold value corresponding to the fluctuation amplitude; wherein, the rate threshold value corresponding to the fluctuation amplitude is the interval minimum value of the target fluctuation interval;
and the call-back submodule is used for calling back the running frequency according to a preset second adjusting rate until the running frequency at the current moment is adjusted.
Optionally, the apparatus further comprises:
the real-time voltage value acquisition module is used for acquiring an input voltage value in real time when the heat pump frequency conversion unit is electrified;
the input voltage interval determining module is used for determining a preset input voltage interval according to the change trend of the input voltage value in a third preset time period;
and the target operating frequency adjusting module is used for adjusting the operating frequency to a target operating frequency corresponding to the preset input voltage interval and starting the heat pump frequency conversion unit.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.