CN109812920B - Method and device for controlling starting and stopping of multiple compressors of air conditioner and multi-split system - Google Patents
Method and device for controlling starting and stopping of multiple compressors of air conditioner and multi-split system Download PDFInfo
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Abstract
The invention provides a method and a device for controlling starting and stopping of multiple compressors of an air conditioner and a multi-split system, wherein the control method comprises the following steps: after a starting instruction of a compressor to be started is detected, judging the running states of all compressors in the same system; if the compressor is in the stop state, adjusting the compressor to be started; starting the compressor to be started after the operation parameters of the compressor to be started fall into a first preset range; if the part is in the opening state, reducing the running frequency of the compressor in the opening state; adjusting the compressor to be started; and starting the compressor to be started after the operation parameter falls into a third preset range. The control method of the invention can start the compressor to be started when the compressor to be started meets the starting condition by detecting the factors influencing the starting, such as the running parameters of the compressor to be started and the compressor in the starting state, thereby greatly reducing the possibility of desynchronizing the compressor to be started.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a method and a device for controlling starting and stopping of multiple compressors of an air conditioner and a multi-split system.
Background
Along with the rapid development of the economy of China in recent years, the living standard of people is increasingly improved, and the use of air conditioners is more and more common. The air conditioner system with multiple compressors has large refrigerating and heating capacity, can meet the requirements of large-scale places on refrigerating and heating, and is widely applied to places such as hotels, restaurants, schools, theaters, markets, office buildings, residential buildings, hospitals and the like.
However, in this air conditioner system, if the compressor is improperly controlled, the compressor is likely to be out of step if installed in the same system, which greatly affects the service life of the compressor.
Disclosure of Invention
In view of this, the present invention is directed to a method for controlling start and stop of multiple compressors of an air conditioner to solve the problem that the compressors are prone to step out.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a control method for starting and stopping multiple compressors of an air conditioner comprises the following steps:
after a starting instruction of a compressor to be started is detected, judging the running states of all compressors in the same system;
if all the compressors are in a shutdown state, judging the operation parameters of the compressors to be started and adjusting the compressors to be started according to the judgment;
starting the compressor to be started after the operation parameters of the compressor to be started fall into a first preset range;
if part of all the compressors is in an open state, reducing the running frequency of the compressors in the open state;
judging the operation parameters of the compressor to be started and adjusting the compressor to be started according to the judgment after the operation frequency of the compressor in the starting state falls into a second preset range;
and starting the compressor to be started after the operating parameter of the compressor to be started falls into a third preset range.
Further, the method also comprises the following steps:
after a stop instruction of a compressor to be closed is detected, reducing the running frequency of the compressor in an opening state;
and closing the compressor to be closed after the running frequency of the compressor in the opening state falls into a fourth preset range.
Further, the operation parameters of the compressor to be started at least include any one of the following: high pressure, high and low pressure difference, exhaust temperature and shutdown protection time.
Further, the determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination includes:
acquiring the high pressure and the high-low pressure difference of the compressor to be started;
judging whether the high-pressure and the high-low pressure difference fall into the first preset range or not;
if not, communicating the exhaust pipeline of the compressor to be started with an air return pipeline, and returning to the step of judging whether the high-pressure and the high-low pressure difference fall into the first preset range.
Further, the determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination includes:
acquiring the exhaust temperature of the compressor to be started;
judging whether the exhaust temperature falls into the first preset range or not;
if not, the outer fan is started;
and after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range.
Further, the determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination includes:
acquiring the exhaust temperature of the compressor to be started;
judging whether the exhaust temperature falls into the first preset range or not;
if not, acquiring the running mode of the air conditioner and judging;
if the operation mode of the air conditioner is a refrigeration mode, the air speed of an outer fan is increased;
after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range;
if the operation mode of the air conditioner is a heating mode, reducing the wind speed of the outer fan;
and after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range.
Compared with the prior art, the method for controlling the starting and the stopping of the multiple compressors of the air conditioner has the following advantages:
(1) the method for controlling the starting and the stopping of the multiple compressors of the air conditioner can start the compressor to be started when the compressor to be started meets the starting condition by detecting the factors influencing the starting, such as the running parameters of the compressor to be started and the compressor in the starting state and the like when the multiple compressors exist in the air conditioner system, thereby greatly reducing the probability of the starting failure of the compressor to be started, ensuring the successful starting of the compressor and further eliminating the service life influence caused by the starting failure of the compressor in the system.
(2) According to the control method for starting and stopping the multiple compressors of the air conditioner, the compressor to be started is closed when the compressor to be closed meets the closing condition, so that the probability of invalid closing of the compressor to be started is greatly reduced, the effective closing of the compressor is ensured, and the influences of service life and the like caused by (greatly reduced) invalid closing of the compressor in the system are eliminated.
The invention also aims to provide a control device for starting and stopping multiple compressors of an air conditioner, so as to solve the problem that the compressors are easy to step out.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a controlling means that air conditioner multiple compressor opened and stops, it includes:
the controller is used for judging the running states of all the compressors in the same system after detecting a starting instruction of the compressor to be started;
if all the compressors are in a shutdown state, the controller judges the operation parameters of the compressors to be started and adjusts the compressors to be started according to the judgment;
after the operating parameters of the compressor to be started fall into a first preset range, the controller starts the compressor to be started;
if part of all the compressors is in an open state, the controller reduces the running frequency of the compressors in the open state;
after the operating frequency of the compressor in the starting state falls into a second preset range, the controller judges the operating parameters of the compressor to be started and adjusts the compressor to be started according to the judgment;
and after the operating parameters of the compressor to be started fall into a third preset range, the controller starts the compressor to be started.
Further, the method also comprises the following steps:
the controller is also used for reducing the running frequency of the compressor in the starting state after detecting a stop instruction of the compressor to be closed;
and after the running frequency of the compressor in the starting state falls into a fourth preset range, the controller closes the compressor to be closed.
Further, the controller judges the operating parameters of the compressor to be started and adjusts the compressor to be started according to the judgment, including:
the acquisition unit acquires the high-pressure and the high-low pressure difference of the compressor to be started;
the controller judges whether the high-pressure and the high-low pressure difference fall into the first preset range or not;
if not, the controller communicates the exhaust pipeline of the compressor to be started with the air return pipeline, and judges whether the high-pressure and the high-low pressure difference fall into the first preset range again.
Further, the controller judges the operating parameters of the compressor to be started and adjusts the compressor to be started according to the judgment, including:
the obtaining unit obtains the exhaust temperature of the compressor to be started;
the controller judges whether the exhaust temperature falls into the first preset range;
if not, the controller starts the outer fan;
after the first preset time, the controller judges whether the exhaust temperature falls into the first preset range again.
Compared with the prior art, the control device for starting and stopping the multiple compressors of the air conditioner has the same advantages as the control method for starting and stopping the multiple compressors of the air conditioner, and the detailed description is omitted.
Another objective of the present invention is to provide a multi-split system to solve the problem that the compressor is prone to step-out.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a multi-split system comprises the control device for starting and stopping the multiple compressors of the air conditioner.
Compared with the prior art, the multi-split system and the control device for starting and stopping the multiple compressors of the air conditioner have the same advantages, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a first flowchart of a method for controlling starting and stopping of multiple compressors of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a method for controlling the start and stop of multiple compressors of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a first flowchart illustrating the adjustment of a compressor to be started according to an embodiment of the present invention;
FIG. 4 is a second flowchart illustrating the adjustment of the compressor to be started according to the embodiment of the present invention;
fig. 5 is a flowchart of adjusting a compressor to be started according to embodiment 2 of the present invention;
fig. 6 is a block diagram of a control device for starting and stopping multiple compressors of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
1-controller, 2-acquisition unit.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Fig. 1 is a first flowchart of a method for controlling starting and stopping of multiple compressors of an air conditioner according to an embodiment of the present invention; the method for controlling the starting and stopping of the multiple compressors of the air conditioner comprises the following steps:
in the same system, a plurality of compressors are provided, and the compressor needing to be started is called as a compressor to be started; after a starting instruction of a compressor to be started is detected, the compressor to be started needs to be started, and at the moment, the running states of all compressors in a system need to be judged firstly; the judgment can be carried out in a traversing mode or other modes, mainly judges whether all compressors in the system are in a stop state or an opening state or partially in the stop state or the opening state, and then carries out different subsequent controls according to different states.
when all the compressors are in a stop state, namely the compressor to be started is the compressor which is started in the whole system firstly, for this purpose, the operation parameters of the compressor to be started are directly obtained, if the operation parameters can not meet the starting conditions, the operation parameters of the compressor to be started are adjusted through the control system until the starting conditions are met.
When the compressor is started, the influences of the pressure of the air inlet and the air outlet, the exhaust temperature and the like (parameters which need to be considered specifically, based on actual judgment conditions) need to be considered, if the parameters do not meet the starting conditions, the starting may fail or the starting is incomplete if the starting is directly carried out, and then the compressor is damaged, so that the service life of the compressor is influenced.
The operation parameter in this step is a parameter that satisfies an operation condition when the compressor is started (i.e., a parameter in the operation condition that needs to be satisfied when the compressor is started), and the operation parameter is obtained in order to determine whether the compressor under the operation parameter satisfies the start condition and can be started, so that the operation parameter must be a parameter that satisfies the operation condition when the compressor is started.
Preferably, the operation parameter may be frequency, exhaust temperature, high pressure, low pressure, high-low pressure difference, etc., and the specific operation parameter is subject to actual conditions.
the first preset range is a starting condition of the compressor to be started, if the operating parameters of the compressor to be started fall into the first preset range, the compressor to be started accords with the starting condition, and the compressor to be started can be started.
some of all the compressors are in an on state, that is, the compressor to be started is not the compressor which is started first in the whole system, so that the starting of the compressor to be started is influenced by the compressor to be started, and the compressor to be started not only comprises the operating parameters of the compressor to be started, but also comprises the operating parameters of the compressor in the on state. For the compressor to be started, the operation frequency of the compressor is the most influential of the operation parameters of the compressor in the on state; if the operation frequency is too high, the starting of the compressor to be started is easy to fail, namely, the compressor is out of step, so that the service life of the compressor to be started is greatly influenced. At this time, the operating frequency of the compressor in the on state needs to be adjusted by the control system until the starting condition of the compressor to be started is satisfied.
the second preset range is one of starting conditions of the compressor to be started, if the operating frequency of the compressor in the starting state falls into the second preset range, the compressor to be started meets one of the starting conditions, the compressor to be started can be started on the basis of meeting other starting conditions, whether the operating parameters of the compressor to be started meet the starting conditions or not can be judged on the basis of meeting the starting conditions, and if the operating parameters cannot meet the starting conditions, the operating parameters of the compressor to be started are adjusted through the control system until the starting conditions are met.
The operating frequency of the compressor in the starting state falls into a second preset range, which means that the operating frequency of the compressor in the starting state is smaller than a frequency preset value. The value range of the frequency preset value is 20Hz-30Hz, and the value can be determined according to the actual situation, so that the compressor can be prevented from being started under the condition of heavy pressure, and the possibility of starting failure is reduced.
And 600, starting the compressor to be started after the operation parameters of the compressor to be started fall into a third preset range.
The third preset range is a starting condition of the compressor to be started, if the operating parameter of the compressor to be started falls into the third preset range, the compressor to be started meets one of the starting conditions, and the compressor to be started can be started on the basis of the starting condition that the operating frequency of the compressor in the starting state falls into the third preset range.
Therefore, when a plurality of compressors exist in the air conditioner system, the to-be-started compressor can be started when the to-be-started compressor meets the starting condition by detecting the starting influence factors such as the running parameters of the to-be-started compressor and the compressor in the starting state, so that the probability of the starting failure of the to-be-started compressor is greatly reduced, the successful starting of the compressor is ensured, and the service life influence caused by the (greatly reduced) starting failure of the compressor in the system is eliminated.
Preferably, as shown in fig. 2, the method for controlling starting and stopping of multiple compressors of an air conditioner further includes:
in the same system, a plurality of compressors are provided, and the compressor needing to be shut down is called a compressor to be shut down; after a stop instruction of a compressor to be closed is detected, the compressor to be closed needs to be closed, and at the moment, for the compressor to be closed, the operation frequency of the compressor in an opening state is the most influenced in the operation parameters of the compressor; if the operation frequency is too high, the compressor to be shut down cannot be shut down effectively, and therefore the service life of the compressor to be shut down is greatly influenced. At this time, the operating frequency of the compressor in the on state needs to be adjusted by the control system until the off condition of the compressor to be turned off is satisfied.
And 800, closing the compressor to be closed after the running frequency of the compressor in the starting state falls into a fourth preset range.
The fourth preset range is a closing condition of the compressor to be closed, and if the operating frequency of the compressor in the opening state falls into the fourth preset range, the compressor to be closed meets the closing condition, and the compressor to be closed can be closed.
When a plurality of compressors exist in the air conditioner system, the compressors to be closed can be closed when the compressors to be closed accord with the closing condition by detecting the factors influencing the compressors to be closed, such as the operating parameters of the compressors in the opening state and the like, so that the probability of invalid closing of the compressors to be closed is greatly reduced, the effective closing of the compressors is ensured, and the influences of the service life and the like caused by the invalid closing of the compressors (greatly reduced) in the system are eliminated.
Preferably, the operating parameters of the compressor to be started at least include any one of the following: high pressure, high and low pressure difference, exhaust temperature and shutdown protection time.
The air conditioner system is provided with one or more air conditioner outdoor units, and one or more compressors are arranged in each air conditioner outdoor unit; for convenience of description, the compressors in the same air conditioner outdoor unit can be regarded as a group of compressors, so that an air conditioner system includes one or more groups of compressors, and the number of the compressors in each group is one or more.
The compressor is provided with an air outlet and an air inlet and mainly used for compressing low-pressure refrigeration steam into high pressure, so that the air inlet of the compressor is low pressure, and the air outlet of the compressor is high pressure. The high pressure in this application is the pressure at the compressor outlet; the low pressure in this application is the pressure at the compressor inlet; the high-low pressure difference in this application is the difference between the high pressure and the low pressure. And in the operation parameters of the compressor to be started, the high-pressure and the high-low pressure difference of the compressor in the same air-conditioning outdoor unit are the same. That is, the high pressure, the low pressure, and the high-low pressure differential pressure of the compressor are measured in the air conditioner outdoor unit as the minimum unit, and the measured high pressure, low pressure, and high-low pressure differential pressure are integrated data of all the compressors in the air conditioner outdoor unit, so that the high pressure and the high-low pressure differential pressure of the compressors (the same group of compressors) in the same air conditioner outdoor unit are the same.
Preferably, as shown in fig. 3, the determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination includes:
the high pressure falls into the first preset range, which means that the high pressure is smaller than a high pressure preset value, the value range of the high pressure preset value is 3.8-4.3Mpa, preferably, the high pressure preset value is 3.8Mpa, and the value can also be determined according to the actual situation. In this way, the compressor can be operated or started or shut down at a safe operating value, thereby preventing a failed start or ineffective shut down due to an excessively high pressure.
The high-pressure and low-pressure differential pressure falls into the first preset range, namely that the high-pressure and low-pressure differential pressure is smaller than a differential pressure preset value, the value range of the differential pressure preset value is 2-4Mpa, preferably, the differential pressure preset value is 2Mpa, and the value can also be determined according to actual conditions. In this way, the compressor can be operated or started or shut down at a safe operating value, thereby preventing a failed start or ineffective shut down due to an excessively high differential pressure between high and low pressures.
If not, the exhaust pipeline of the compressor to be started is communicated with the air return pipeline, and the step 020 is returned.
Through intercommunication exhaust pipe and return air pipeline, can be with high-pressure side and low pressure side intercommunication to make high-pressure side and low pressure side reach pressure balance rapidly, thereby reduce high-pressure and high-low pressure differential pressure, then through the mode of judging again, thereby make and wait to start the compressor high-pressure with high-low pressure differential pressure satisfies the start condition.
Wherein, the communication of exhaust pipe and return air pipeline can be accomplished through following mode:
a communicating pipeline is arranged between the exhaust pipeline and the air return pipeline to connect the exhaust pipeline and the air return pipeline; the communicating pipeline is provided with an electromagnetic valve to control the on-off of the communicating pipeline. Like this, when needs communicate high pressure side and low pressure side, open the solenoid valve, switch on the communicating pipe way to make exhaust pipe and return air pipe way intercommunication, make high pressure side and low pressure side reach pressure balance rapidly.
Preferably, as shown in fig. 4, the determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination further includes:
step 040 of obtaining the exhaust temperature of the compressor to be started;
the air conditioner system comprises one or more groups of compressors, the number of the compressors of each group of compressors is one or more than one, the exhaust temperature of each compressor is different, and the exhaust temperature needs to be measured independently.
050, judging whether the exhaust temperature falls into the first preset range or not;
the exhaust temperature falling within the first preset range means that the exhaust temperature is smaller than a preset temperature value.
When the compressor normally works, the exhaust temperature meets the requirement of the specification of the compressor, and if the exhaust temperature is too high, the compressor is easy to damage, so that the service life of the compressor is shortened. In addition, the higher the exhaust temperature of the compressor is, the demagnetization current of the corresponding compressor can be reduced, and the compressor is easy to generate large current when the start fails, so that the compressor is easy to demagnetize, and the service life of the compressor is shortened.
Wherein the value range of the temperature preset value is 70-120 ℃, and preferably, the temperature preset value is 80 ℃. The value of the preset temperature value can also be determined according to the actual situation. In this way, the compressor can be operated or started or shut down at a safe operating value, thereby preventing a failed start or an ineffective shut down or demagnetization of the compressor due to an excessively high discharge temperature.
by opening the outer fan, the exhaust temperature of the compressor can be reduced, so that the operation parameters of the compressor are adjusted, and the subsequent operation is facilitated.
And 070, returning to 050 after the first preset time.
Through setting up first preset time to make outer fan can operate first preset time, effectively reduce the exhaust temperature of compressor, then through the mode of judging again, thereby make and wait to start the compressor exhaust temperature satisfies the start condition.
Therefore, on the basis that the high-pressure and the high-low pressure difference meet the starting condition, the exhaust temperature meets the starting condition, so that the parameter factors influencing the starting can be eliminated, and the successful starting of the compressor to be started is ensured.
Preferably, the operation parameters of the compressor to be started further include shutdown protection time, and the shutdown protection time falls within a first preset range, which means that the shutdown protection time is greater than a time preset value. The value range of the time preset value is 3-6min, and can also be determined according to the actual situation.
Shutdown protection time, the shutdown protection time for each compressor is measured separately, and is timed from shutdown of one compressor until restart.
Such as: one compressor is turned to the closed state from the open state, and if the compressor is turned on again, the compressor is allowed to be opened only after the shutdown protection time is met, so that the internal pressure of the compressor caused by frequent starting and stopping of the compressor can be prevented from oscillating, and the problem that the service life is shortened due to pressure oscillation is avoided.
Preferably, the exhaust temperature can be determined directly through the step 040-.
Example 2
As shown in fig. 5, the method for controlling starting and stopping of multiple compressors of an air conditioner according to the present embodiment is different from the above method in that the determining the operating parameters of the compressor to be started and adjusting the compressor to be started according to the determining further includes:
051, judging whether the exhaust temperature falls into the first preset range;
the exhaust temperature falling within the first preset range means that the exhaust temperature is smaller than a preset temperature value.
When the compressor normally works, the exhaust temperature meets the requirement of the specification of the compressor, and if the exhaust temperature is too high, the compressor is easy to damage, so that the service life of the compressor is shortened. In addition, the higher the exhaust temperature of the compressor is, the demagnetization current of the corresponding compressor can be reduced, and the compressor is easy to generate large current when the start fails, so that the compressor is easy to demagnetize, and the service life of the compressor is shortened.
Wherein the value range of the temperature preset value is 70-120 ℃, and preferably, the temperature preset value is 80 ℃. The value of the preset temperature value can also be determined according to the actual situation. In this way, the compressor can be operated or started or shut down at a safe operating value, thereby preventing a failed start or an ineffective shut down or demagnetization of the compressor due to an excessively high discharge temperature.
081, after a first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range;
in this step, after the first preset time, the air conditioner starts from step 071, and operates for the first preset time after the wind speed of the external fan is increased; the specific implementation may be:
and starting timing after the step 071 is executed, then judging whether the timing time reaches the first preset time, and if so, executing the subsequent step of returning to judge whether the exhaust temperature falls into the first preset range.
Like this, through setting up this time quantum of first preset time, can expand the influence that improves the wind speed of outer fan to exhaust temperature to reach the purpose that reduces exhaust temperature (improve the wind speed of outer fan and can reach the purpose that reduces exhaust temperature, but this reduction effect needs certain time to realize, need pass through after the first preset time promptly, just can effectively reduce exhaust temperature).
The specific value range of the first preset time can be determined according to actual conditions.
and 001, returning to the step 051 after the first preset time.
Through setting the first preset time, the outer fan can operate for the first preset time at the adjusted wind speed, the exhaust temperature of the compressor is effectively reduced, and then the exhaust temperature of the compressor to be started meets the starting condition through a re-judgment mode.
Therefore, the exhaust temperature is adjusted by adopting different operation modes through judging the operation mode of the air conditioner, so that a better adjusting effect is achieved.
Preferably, the exhaust temperature can be determined directly through the step 041-.
Example 3
The method for controlling starting and stopping of multiple compressors of an air conditioner is different from the method in this embodiment in that the determining of the operating parameters of the compressor to be started and the adjusting of the compressor to be started according to the determining are corresponding contents in step 200; the specific process of the step 500 of determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination is the same as the specific process of the step 200 of determining the operation parameters of the compressor to be started and adjusting the compressor to be started according to the determination, and the difference is only that the first preset range and the third preset range have a certain difference.
Preferably, in order to facilitate the judgment of whether the operating parameters of the compressor to be started meet the starting conditions, the first preset range and the third preset range may be set to be the same preset range, so that the starting conditions of the compressors in all the starting states and the compressors in all the stopping states can be judged by using the same preset range, the judgment workload is reduced, and the judgment speed is increased.
Example 4
As described above, the method for controlling starting and stopping of multiple compressors of an air conditioner in this embodiment is a corresponding apparatus for controlling starting and stopping of multiple compressors of an air conditioner, as shown in fig. 6, the method includes:
the controller 1 is used for judging the running states of all the compressors in the same system after detecting a starting instruction of the compressor to be started;
if all the compressors are in a shutdown state, the controller 1 judges the operation parameters of the compressors to be started and adjusts the compressors to be started according to the judgment;
after the operating parameters of the compressor to be started fall into a first preset range, the controller 1 starts the compressor to be started;
if part of all the compressors is in an open state, the controller 1 reduces the operating frequency of the compressor in the open state;
after the operating frequency of the compressor in the starting state falls into a second preset range, the controller 1 judges the operating parameters of the compressor to be started and adjusts the compressor to be started according to the judgment;
and after the operating parameters of the compressor to be started fall into a third preset range, the controller 1 starts the compressor to be started.
Therefore, when a plurality of compressors exist in the air conditioner system, the to-be-started compressor can be started when the to-be-started compressor meets the starting condition by detecting the starting influence factors such as the running parameters of the to-be-started compressor and the compressor in the starting state, so that the probability of the starting failure of the to-be-started compressor is greatly reduced, the successful starting of the compressor is ensured, and the service life influence caused by the (greatly reduced) starting failure of the compressor in the system is eliminated.
Example 5
As above-mentioned controlling means that many compressors of air conditioner open and stop, this embodiment lies in rather than the difference, the controlling means that many compressors of air conditioner open and stop still includes:
the controller 1 is further configured to reduce the operating frequency of the compressor in an on state after detecting a stop instruction of the compressor to be turned off;
and after the running frequency of the compressor in the starting state falls into a fourth preset range, the controller 1 closes the compressor to be closed.
When a plurality of compressors exist in the air conditioner system, the compressors to be closed can be closed when the compressors to be closed accord with the closing condition by detecting the factors influencing the compressors to be closed, such as the operating parameters of the compressors in the opening state and the like, so that the probability of invalid closing of the compressors to be closed is greatly reduced, the effective closing of the compressors is ensured, and the influences of the service life and the like caused by the invalid closing of the compressors (greatly reduced) in the system are eliminated.
Example 6
As described above, this embodiment differs from the above control device for starting and stopping multiple compressors of an air conditioner in that the controller 1 determines the operating parameters of the compressor to be started and adjusts the compressor to be started according to the determination, including:
the acquisition unit 2 acquires the high-pressure and the high-low pressure difference of the compressor to be started;
the controller 1 judges whether the high pressure and the high-low pressure difference fall into the first preset range;
if not, the controller 1 communicates the exhaust pipeline of the compressor to be started with the air return pipeline, and judges whether the high-pressure and the high-low pressure difference fall into the first preset range again.
Through intercommunication exhaust pipe and return air pipeline, can be with high-pressure side and low pressure side intercommunication to make high-pressure side and low pressure side reach pressure balance rapidly, thereby reduce high-pressure and high-low pressure differential pressure, then through the mode of judging again, thereby make and wait to start the compressor high-pressure with high-low pressure differential pressure satisfies the start condition.
Example 7
As described above, this embodiment differs from the above control device for starting and stopping multiple compressors of an air conditioner in that the controller 1 determines the operating parameters of the compressor to be started and adjusts the compressor to be started according to the determination, including:
the acquiring unit 2 acquires the exhaust temperature of the compressor to be started;
the controller 1 judges whether the exhaust temperature falls within the first preset range;
if not, the controller 1 starts an outer fan;
after the first preset time, the controller 1 judges again whether the exhaust temperature falls within the first preset range.
Through setting up first preset time to make outer fan can operate first preset time, effectively reduce the exhaust temperature of compressor, then through the mode of judging again, thereby make and wait to start the compressor exhaust temperature satisfies the start condition.
Therefore, on the basis that the high-pressure and the high-low pressure difference meet the starting condition, the exhaust temperature meets the starting condition, so that the parameter factors influencing the starting can be eliminated, and the successful starting of the compressor to be started is ensured.
Example 8
As described above, this embodiment differs from the above control device for starting and stopping multiple compressors of an air conditioner in that the operation parameters of the to-be-started compressor are determined and the to-be-started compressor is adjusted according to the determination, which includes:
the acquiring unit 2 acquires the exhaust temperature of the compressor to be started;
the controller 1 judges whether the exhaust temperature falls within the first preset range;
if not, the operation mode of the air conditioner is obtained through the obtaining unit 2 and judged;
if the operation mode of the air conditioner is a refrigeration mode, the controller 1 increases the wind speed of the outer fan;
after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range;
if the operation mode of the air conditioner is a heating mode, the controller 1 reduces the wind speed of the outer fan;
and after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range.
Through setting the first preset time, the outer fan can operate for the first preset time at the adjusted wind speed, the exhaust temperature of the compressor is effectively reduced, and then the exhaust temperature of the compressor to be started meets the starting condition through a re-judgment mode.
Therefore, the exhaust temperature is adjusted by adopting different operation modes through judging the operation mode of the air conditioner, so that a better adjusting effect is achieved.
Example 9
As described above, the present embodiment provides a computer-readable storage medium, which stores instructions, and when the instructions are loaded and executed by a processor, the method for controlling starting and stopping of multiple compressors of an air conditioner described in the foregoing method embodiments may be implemented.
The technical solution of the embodiment of the present invention substantially or partly contributes to the prior art, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiment of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Example 10
A multi-split system comprises the control device for starting and stopping the multiple compressors of the air conditioner in any one of the above embodiments.
Therefore, the starting of the compressor to be started can be started when the starting condition of the compressor to be started is met by detecting the starting influence factors such as the running parameters of the compressor to be started and the compressor in the starting state, so that the probability of the starting failure of the compressor to be started is greatly reduced, the successful starting of the compressor is ensured, and the service life influence caused by the starting failure of the compressor in the system is eliminated (greatly reduced).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A control method for starting and stopping multiple compressors of an air conditioner is characterized by comprising the following steps:
after a starting instruction of a compressor to be started is detected, judging the running states of all compressors in the same system; the system comprises at least two groups of compressors, and the same group of compressors is positioned in the same air conditioner outdoor unit;
if all the compressors are in a shutdown state, judging the operation parameters of the compressors to be started and adjusting the compressors to be started according to the judgment, wherein the operation parameters of the compressors to be started at least comprise any one of the following parameters: high pressure, high-low pressure difference, exhaust temperature and shutdown protection time; the low pressure, the high pressure and the high-low pressure difference of the compressor are measured by taking an air conditioner outdoor unit as a minimum unit, and the low pressure, the high pressure and the high-low pressure difference of the air conditioner outdoor unit are obtained by integrating the operation parameters of all the compressors in the air conditioner outdoor unit;
starting the compressor to be started after the operation parameters of the compressor to be started fall into a first preset range;
if part of compressors in all the compressors are in an open state, reducing the running frequency of the compressors in the open state;
judging the operation parameters of the compressor to be started and adjusting the compressor to be started according to the judgment after the operation frequency of the compressor in the starting state falls into a second preset range;
starting the compressor to be started after the operation parameter of the compressor to be started falls into a third preset range;
the judging the operation parameters of the compressor to be started and adjusting the compressor to be started according to the judgment comprises the following steps:
acquiring the high pressure and the high-low pressure difference of the compressor to be started;
judging whether the high-pressure and the high-low pressure difference fall into the first preset range or not;
if not, communicating the exhaust pipeline of the compressor to be started with an air return pipeline, and returning to the step of judging whether the high-pressure and the high-low pressure difference fall into the first preset range.
2. The method for controlling the start and stop of the multiple compressors of the air conditioner according to claim 1, further comprising:
after a stop instruction of a compressor to be closed is detected, reducing the running frequency of the compressor in an opening state in the same system;
and closing the compressor to be closed after the running frequency of the compressor in the opening state falls into a fourth preset range.
3. The method for controlling the start and stop of the multiple compressors of the air conditioner according to claim 1, wherein the step of judging the operation parameters of the compressors to be started and adjusting the compressors to be started according to the judgment comprises the following steps:
acquiring the exhaust temperature of the compressor to be started;
judging whether the exhaust temperature falls into the first preset range or not;
if not, the outer fan is started;
and after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range.
4. The method for controlling the start and stop of the multiple compressors of the air conditioner according to claim 1, wherein the step of judging the operation parameters of the compressors to be started and adjusting the compressors to be started according to the judgment comprises the following steps:
acquiring the exhaust temperature of the compressor to be started;
judging whether the exhaust temperature falls into the first preset range or not;
if not, acquiring the running mode of the air conditioner and judging;
if the operation mode of the air conditioner is a refrigeration mode, the air speed of an outer fan is increased;
after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range;
if the operation mode of the air conditioner is a heating mode, reducing the wind speed of the outer fan;
and after the first preset time, returning to the step of judging whether the exhaust temperature falls into the first preset range.
5. The utility model provides a controlling means that many compressors of air conditioner started and stops which characterized in that includes:
the controller (1) is used for judging the running states of all the compressors in the same system after detecting a starting instruction of the compressor to be started; the system comprises at least two groups of compressors, and the same group of compressors is positioned in the same air conditioner outdoor unit;
if all the compressors are in a shutdown state, the controller (1) judges the operation parameters of the compressors to be started and adjusts the compressors to be started according to the judgment, and the operation parameters of the compressors to be started at least comprise any one of the following parameters: high pressure, high-low pressure difference, exhaust temperature and shutdown protection time; the low pressure, the high pressure and the high-low pressure difference of the compressor are measured by taking an air conditioner outdoor unit as a minimum unit, and the low pressure, the high pressure and the high-low pressure difference of the air conditioner outdoor unit are obtained by integrating the operation parameters of all the compressors in the air conditioner outdoor unit;
after the operating parameters of the compressor to be started fall into a first preset range, the controller (1) starts the compressor to be started;
if part of all the compressors is in an open state, the controller (1) reduces the running frequency of the compressors in the open state;
after the operating frequency of the compressor in the starting state falls into a second preset range, the controller (1) judges the operating parameters of the compressor to be started and adjusts the compressor to be started according to the judgment;
after the operating parameters of the compressor to be started fall into a third preset range, the controller (1) starts the compressor to be started;
the controller (1) is further configured to: acquiring the high pressure and the high-low pressure difference of the compressor to be started; judging whether the high-pressure and the high-low pressure difference fall into the first preset range or not; if not, communicating the exhaust pipeline of the compressor to be started with an air return pipeline, and re-executing the judgment of whether the high-pressure and the high-low pressure difference fall into the first preset range.
6. An air conditioner multi-compressor start-stop control device according to claim 5, characterized by further comprising:
the controller (1) is further used for reducing the running frequency of the compressor in an opening state after detecting a stop instruction of the compressor to be closed;
and after the running frequency of the compressor in the starting state falls into a fourth preset range, the controller (1) closes the compressor to be closed.
7. A computer readable storage medium storing instructions, wherein the instructions are loaded and executed by a processor to implement the method for controlling start and stop of multiple compressors of an air conditioner according to any one of claims 1 to 4.
8. A multi-split system characterized by comprising the control device for starting and stopping the air conditioner multi-compressor of claim 5 or 6.
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| CN110160126B (en) * | 2019-04-18 | 2021-02-09 | 广东智科电子股份有限公司 | Variable-frequency heating multi-split control method, device, equipment and storage medium |
| CN110332670A (en) * | 2019-07-16 | 2019-10-15 | 珠海格力电器股份有限公司 | Compressor control method and control device and refrigerant system |
| CN111121227B (en) * | 2019-12-30 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Fault detection method and device under low-voltage pressure switch protection mode and air conditioner |
| CN111397167B (en) * | 2020-03-23 | 2021-11-05 | 广东海悟科技有限公司 | Double-frequency conversion system, control method of frequency conversion compressor of double-frequency conversion system and storage medium |
| CN113154624B (en) * | 2021-04-16 | 2022-05-06 | 宁波奥克斯电气股份有限公司 | Air conditioner compressor starting control method and air conditioner |
| CN113405212B (en) * | 2021-06-30 | 2024-08-27 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, control method and device thereof and storage medium |
| CN113352844A (en) * | 2021-07-13 | 2021-09-07 | 青岛海信网络能源股份有限公司 | Parking air conditioner and control method thereof |
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| FR2521272B1 (en) * | 1982-02-09 | 1985-12-13 | Bonnet Ets | CONTROL PROGRAMMER FOR MULTI-COMPRESSOR REFRIGERATION PLANT |
| JPH08121893A (en) * | 1994-10-27 | 1996-05-17 | Hitachi Ltd | Heat pump |
| CN100570226C (en) * | 2007-11-08 | 2009-12-16 | 无锡同方人工环境有限公司 | A kind of control method of modular multi-connection operation |
| CN201382636Y (en) * | 2009-02-08 | 2010-01-13 | 广东美的电器股份有限公司 | Start-up auxiliary device of shunt-wound compressor |
| CN104847638B (en) * | 2015-03-17 | 2018-06-05 | 广东美的暖通设备有限公司 | The startup method and starter of compressor |
| CN105299836A (en) * | 2015-11-09 | 2016-02-03 | 南京天加空调设备有限公司 | Control method for multi-split air conditioning system |
| CN105650817B (en) * | 2016-01-25 | 2018-09-04 | 美的集团武汉制冷设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN107345514B (en) * | 2016-05-06 | 2020-02-07 | 中国石油化工股份有限公司 | Compressor starting system and method |
| CN106288237B (en) * | 2016-10-10 | 2019-04-23 | 芜湖美智空调设备有限公司 | A kind of halt control method of air conditioner, control device and air conditioner |
| CN107036245B (en) * | 2017-04-25 | 2020-01-07 | 广东美的暖通设备有限公司 | Multi-split air conditioner system and control device and method of outdoor compressor thereof |
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