CN107990499B - air conditioning system control method and air conditioning system - Google Patents
air conditioning system control method and air conditioning system Download PDFInfo
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- CN107990499B CN107990499B CN201711133273.3A CN201711133273A CN107990499B CN 107990499 B CN107990499 B CN 107990499B CN 201711133273 A CN201711133273 A CN 201711133273A CN 107990499 B CN107990499 B CN 107990499B
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Abstract
the invention discloses an air conditioning system control method and an air conditioning system, wherein the air conditioning system control method comprises the following steps: acquiring environmental parameters and setting parameters of a user, wherein the setting parameters of the user comprise parameters of indoor units set to be started by the user, and the number of the indoor units set to be started by the user is recorded as a first preset number; acquiring the operating load of the air conditioning system according to the environmental parameters and the set parameters; when the operation load is smaller than the lowest normal work load, controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree; wherein the lowest normal workload corresponds to the first degree of superheat, the first predetermined number being less than the second predetermined number. The technical scheme of the invention improves the stability of the operation of the air conditioning system.
Description
Technical Field
the invention relates to the technical field of air conditioners, in particular to an air conditioner system control method and an air conditioner system.
background
in an air conditioning system, particularly a multi-split air conditioning system and other central air conditioning systems, after an outdoor unit is started, if the load of an indoor unit is low and can be small, the condition of insufficient superheat degree occurs in the air conditioning system, and a compressor is difficult to normally operate. The existing scheme for solving the problem of insufficient superheat degree of the air conditioning system is to execute fault protection measures after the condition of insufficient superheat degree lasts for a set time, and usually, after the fault protection measures are continuously executed for three times, the air conditioning system needs to be powered off and restarted to be enabled to recover operation. However, if the operation load of the air conditioning system is always low and correspondingly the superheat degree is also always low, the air conditioning system is likely to always automatically execute the fault protection measure, and the superheat degree of the air conditioning system is still difficult to be effectively improved, so that a user needs to frequently restart the air conditioning system, the operation is very inconvenient, and the normal operation of the compressor is also difficult to be guaranteed, so that the operation of the air conditioning system is very unstable.
Disclosure of Invention
the invention mainly aims to provide an air conditioning system control method, which aims to solve the technical problem that the superheat degree of the air conditioning system is always low under the condition of small load and improve the running stability of the air conditioning system.
the air conditioning system comprises an outdoor unit and at least two indoor units, and in order to achieve the purpose, the air conditioning system control method provided by the invention comprises the following steps:
acquiring environmental parameters and setting parameters of a user, wherein the setting parameters of the user comprise parameters of indoor units set to be started by the user, and the number of the indoor units set to be started by the user is recorded as a first preset number;
acquiring the operating load of the air conditioning system according to the environmental parameters and the set parameters;
when the operation load is smaller than the lowest normal work load, controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree;
Wherein the lowest normal workload corresponds to the first degree of superheat, the first predetermined number being less than the second predetermined number.
Preferably, after the step of controlling the operation of the second preset number of indoor units, the air conditioning system control method further includes the steps of:
Accumulating the running duration of a second preset number of the indoor units;
and when the duration time is greater than or equal to a first preset time, controlling the indoor units of a first preset number to operate.
preferably, after the step of controlling the operation of the second preset number of indoor units, the air conditioning system control method further includes the steps of:
Acquiring the superheat degree of the air conditioning system;
when the superheat degree is larger than or equal to a second superheat degree, gradually reducing the number of the running indoor units according to the superheat degree until the number of the running indoor units reaches the first preset number;
wherein the second degree of superheat is greater than or equal to the first degree of superheat.
preferably, after the step of acquiring the degree of superheat of the air conditioning system, the air conditioning system control method further includes the steps of:
when the superheat degree is smaller than a third superheat degree, controlling the air conditioning system to stop running and generating a prompt signal;
wherein the third degree of superheat is less than the second degree of superheat.
Preferably, the environmental parameter comprises an environmental temperature, and the setting parameter comprises a setting temperature;
the step of obtaining the operating load of the air conditioning system according to the environmental parameters and the set parameters comprises the following steps:
judging whether the continuous shutdown time of the air conditioning system before the current operation is less than or equal to a second preset time or not;
If so, judging that the operation load is greater than or equal to the preset load;
if not, judging whether the absolute value of the difference between the current environment temperature and the set temperature is greater than or equal to a preset temperature difference;
if so, judging that the operation load is greater than or equal to the preset load;
if not, judging whether the ratio of the sum of the capacities of the indoor units of a first preset number to the capacity of the outdoor unit is greater than or equal to a preset ratio or not;
If so, judging that the operation load is greater than or equal to the preset load;
If not, the operation load is judged to be smaller than the preset load.
Preferably, the outdoor unit includes a compressor;
when the operation load is smaller than the lowest normal work load, the step of controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree comprises the following steps:
acquiring a target frequency of the compressor according to the environmental parameters and the set parameters;
Controlling the compressor to operate at a preset frequency;
Wherein the preset frequency is greater than the target frequency.
preferably, the air conditioning system comprises control valves connected between the outdoor unit and the indoor units, and the control valves are arranged in one-to-one correspondence with the indoor units;
when the operation load is smaller than the lowest normal work load, the step of controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree comprises the following steps:
acquiring a first preset opening degree of the control valve corresponding to a first preset number of indoor units according to the environment parameter and the set parameter;
controlling the control valves corresponding to the indoor units with the first preset number to be opened at a first preset opening degree, and controlling the control valves corresponding to the indoor units with the third preset number to be opened at a second preset opening degree;
The second preset opening degree is smaller than the first preset opening degree, and the third preset number is equal to the difference between the second preset number and the first preset number.
preferably, when the operation load is less than the lowest normal operation load, the step of controlling a second preset number of the indoor units to operate so that the degree of superheat of the air conditioning system is greater than or equal to a first degree of superheat further comprises:
Detecting whether the third preset number of indoor units generate condensation or not;
When no condensation is generated in the third preset number of indoor units, maintaining the opening degree of each control valve corresponding to the third preset number of indoor units; or increasing the opening degree of the control valve corresponding to at least part of the indoor units with a third preset number, reducing the number of the running indoor units, and updating the second preset number and the third preset number according to the number of the running indoor units;
when condensation is generated in a part of the indoor units in a third preset number of indoor units, reducing the opening of a control valve corresponding to the indoor unit generating the condensation, and increasing the opening of a control valve corresponding to the indoor unit not generating the condensation;
when the third preset number of indoor units generate condensation, the opening degree of each control valve corresponding to the third preset number of indoor units is reduced, the number of the running indoor units is increased, and the second preset number and the third preset number are updated according to the number of the running indoor units.
The invention also provides an air conditioning system, which comprises an outdoor unit, at least two indoor units, a memory, a processor and an air conditioning system control program which is stored on the memory and can be operated on the processor, wherein the air conditioning system control program realizes the steps of the air conditioning system control method when being executed by the processor, and the air conditioning system control method comprises the following steps: acquiring environmental parameters and setting parameters of a user, wherein the setting parameters of the user comprise parameters of indoor units set to be started by the user, and the number of the indoor units set to be started by the user is recorded as a first preset number; acquiring the operating load of the air conditioning system according to the environmental parameters and the set parameters; when the operation load is smaller than the lowest normal work load, controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree; wherein the lowest normal workload corresponds to the first degree of superheat, the first predetermined number being less than the second predetermined number.
preferably, the air conditioning system comprises control valves connected between the outdoor unit and the indoor units, and the control valves are arranged in one-to-one correspondence with the indoor units; the outdoor unit comprises a compressor and a low-pressure liquid storage tank, and the low-pressure liquid storage tank is arranged at a suction end of the compressor.
the air conditioning system in the technical scheme of the invention comprises an outdoor unit and at least two indoor units; the air conditioning system control method comprises the following steps: acquiring environmental parameters and setting parameters of a user, wherein the setting parameters of the user comprise parameters of indoor units set to be opened by the user, and the number of the indoor units set to be opened by the user is recorded as a first preset number, namely, the indoor units required to be opened by the user are determined through the setting parameters; acquiring the operation load of the air conditioning system according to the environmental parameter and the setting parameter, wherein generally, when the difference between the same physical quantity in the environmental parameter and the setting parameter is larger, such as temperature and the like, the operation load of the air conditioning system is larger, and of course, the operation load of the air conditioning system is also related to the number of started indoor units, the area size of a room regulated and controlled by the air conditioning system and other factors; when the operation load is smaller than the lowest normal work load, controlling a second preset number of indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to the first superheat degree; the lowest normal work load corresponds to the first superheat degree, the first preset number is smaller than the second preset number, the number of the indoor units which actually run is increased to the second preset number, so that the refrigerants in the air conditioning system flow to the indoor units more, the superheat degree of the air conditioning system is increased, on one hand, the situation that the compressor cannot normally work due to liquid impact is avoided, on the other hand, the problem that the superheat degree is always insufficient due to the fact that the load of the air conditioning system is too small, the air conditioning system cannot normally run is also avoided, and the running stability of the air conditioning system is improved.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an air conditioning system according to the present invention;
FIG. 2 is a schematic flow chart illustrating a control method of an air conditioning system according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a control method of an air conditioning system according to a second embodiment of the present invention;
FIG. 4 is a flowchart illustrating a control method of an air conditioning system according to a third embodiment of the present invention;
FIG. 5 is a flowchart illustrating a fourth embodiment of a method for controlling an air conditioning system according to the present invention;
Fig. 6 is a schematic flowchart of step S200 in a fifth embodiment of the air conditioning system control method according to the present invention;
fig. 7 is a partial flowchart of step S300 in a sixth embodiment of a method for controlling an air conditioning system according to the present invention;
Fig. 8 is a partial flowchart of step S300 in a seventh embodiment of the air conditioning system control method according to the present invention;
fig. 9 is a partial flowchart of step S300 in an eighth embodiment of the air conditioning system control method according to the present invention;
Fig. 10 is a partial flowchart of step S300 in the ninth embodiment of the air conditioning system control method according to the present invention.
the reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | name (R) |
| 100 | outdoor machine | 110 | Compressor with a compressor housing having a plurality of compressor blades |
| 120 | low-pressure liquid storage tank | 200 | indoor machine |
| 300 | Control valve | 400 | Memory device |
| 500 | processor with a memory having a plurality of memory cells |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments 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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
in addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
the invention provides an air conditioning system control method.
as shown in fig. 1, the air conditioning system of the present invention includes an outdoor unit 100 and at least two indoor units 200. In the embodiment of the present invention, as shown in fig. 2, the air conditioning system control method includes the following steps:
s100, acquiring environmental parameters and setting parameters of a user;
generally, in an air conditioning system, each outdoor unit 100 is disposed corresponding to at least two indoor units 200, and different indoor units 200 are installed in different spatial regions to achieve regulation and control of parameters such as temperature in the spatial regions. The user controls the indoor unit 200 corresponding to the specific spatial region to operate according to the user's own needs. The environmental parameters include the environmental temperature, the area of the space region, the heat exchange condition with the external region and other parameters. For example, the ambient temperature generally includes an outdoor temperature, an indoor temperature, and the like, and the corresponding indoor temperature is substantially equal to the outdoor temperature immediately after the indoor unit 200 of the air conditioning system is turned on. The set parameters of the user include parameters of the indoor units set to be opened by the user, specifically, the set parameters include numbers, positions and the like of the indoor units set to be opened, so that the air conditioning system can control the corresponding indoor units to operate according to the parameters such as the numbers, the positions and the like, and the number of the indoor units set to be opened by the user is recorded as a first preset number. Of course, the setting parameters may also include the operation mode of the indoor unit set by the user, such as a cooling mode, a heating mode, and the like, and the setting temperature of the user. In the embodiment of the present invention, the control method of the air conditioning system will be specifically described by taking the cooling mode as an example, and the control method in the heating mode can be adjusted correspondingly with reference to the condition of the cooling mode.
s200, acquiring the operation load of the air conditioning system according to the environmental parameters and the set parameters;
the operating load of the air conditioning system is related to the environmental parameters and the setting parameters. For example, when the absolute value of the difference between the ambient temperature and the set temperature is large, the operation load of the air conditioning system also increases accordingly; or when the area of the space region regulated and controlled by the air conditioning system is increased, or when the heat exchange between the space region and the external region is increased, the operation load of the air conditioning system is also increased correspondingly. The operation load can be obtained by combining the environmental parameters and the set parameters through theoretical calculation, fitting, table look-up and the like.
And step S300, when the operation load is less than the lowest normal work load, controlling a second preset number of indoor units to operate so as to enable the superheat degree of the air conditioning system to be greater than or equal to the first superheat degree.
the superheat degree of an air conditioning system is a difference between a superheat temperature and a saturation temperature of a refrigerant at the same evaporation pressure in a refrigeration cycle of the air conditioning system. In order to ensure the safe operation of the compressor in the air conditioning system and prevent the compressor from being damaged by liquid impact, a certain superheat degree needs to be ensured in the operation process of the air conditioning system. With the increase of the operation load of the air conditioning system, the amount of the gaseous refrigerant in the refrigerant circuit is increased, and the amount of the liquid refrigerant is reduced, namely, the superheat degree of the air conditioning system is increased. In this embodiment, the lowest normal workload of the air conditioning system corresponds to the first superheat degree, and more refrigerants circulate to more indoor units in a gaseous form by controlling the operation of a second preset number of indoor units, which is greater than the first preset number set by a user, so that the superheat degree of the system is increased and is greater than or equal to the first superheat degree corresponding to the lowest normal workload, thereby reducing the risk that the compressor suffers from liquid impact due to too low superheat degree, enabling the air conditioning system to operate normally and stably without starting fault protection measures, and enabling the user to avoid frequently handling abnormal conditions caused by starting of the fault protection measures, thereby facilitating the use of the user and enabling the operation of the air conditioning system to be more stable.
In this embodiment, the air conditioning system includes an outdoor unit 100 and at least two indoor units 200; the air conditioning system control method comprises the following steps: acquiring environmental parameters and setting parameters of a user, wherein the setting parameters of the user comprise parameters of indoor units set to be opened by the user, and the number of the indoor units set to be opened by the user is recorded as a first preset number, namely, the indoor units required to be opened by the user are determined through the setting parameters; acquiring the operation load of the air conditioning system according to the environmental parameter and the setting parameter, wherein generally, when the difference between the same physical quantity in the environmental parameter and the setting parameter is larger, such as temperature and the like, the operation load of the air conditioning system is larger, and of course, the operation load of the air conditioning system is also related to the number of started indoor units, the area size of a room regulated and controlled by the air conditioning system and other factors; when the operation load is smaller than the lowest normal work load, controlling a second preset number of indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to the first superheat degree; the lowest normal work load corresponds to the first superheat degree, the first preset number is smaller than the second preset number, the number of the indoor units which actually run is increased to the second preset number, so that the refrigerants in the air conditioning system flow to the indoor units more, the superheat degree of the air conditioning system is increased, on one hand, the situation that the compressor cannot normally work due to liquid impact is avoided, on the other hand, the problem that the superheat degree is always insufficient due to the fact that the load of the air conditioning system is too small, the air conditioning system cannot normally run is also avoided, and the running stability of the air conditioning system is improved.
in a second embodiment of the present invention, as shown in fig. 3, after the step of controlling the operation of the second preset number of indoor units, the air conditioning system control method further includes the steps of:
Step S400, accumulating the running duration of the indoor units of a second preset number;
and S500, when the duration time is greater than or equal to a first preset time, controlling the indoor units with a first preset number to operate.
When the operation duration of the second preset number of indoor units is longer than or equal to the first preset time, enough liquid refrigerant in the air conditioning system is converted into gaseous refrigerant, the gaseous refrigerant circulates in the refrigerant loop, the superheat degree of the gaseous refrigerant is also longer than or equal to the first superheat degree, and the gaseous refrigerant can be stably maintained within a certain time. At the moment, the first preset number of indoor units are controlled to operate, namely, the indoor units which are not set by the user to operate in the second preset number of indoor units are closed, so that the normal operation of the air conditioning system is guaranteed, and meanwhile, the energy consumption of the air conditioning system can be effectively reduced. The first preset time is related to the first preset number, and the first preset time can be properly reduced along with the increase of the first preset number. Generally, the first preset time is set to be 15-30 minutes, in a specific example, the first preset time is set to be 20 minutes, that is, after the second preset number of indoor units are operated for 20 minutes, the operation of the first preset number of indoor units is controlled.
In a third embodiment of the present invention, as shown in fig. 4, after the step of controlling the operation of the second preset number of indoor units, the air conditioning system control method further includes the steps of:
S600, obtaining the superheat degree of an air conditioning system;
step S700, when the superheat degree is larger than or equal to a second superheat degree, gradually reducing the number of the running indoor units according to the superheat degree until the number of the running indoor units reaches a first preset number;
Wherein the second degree of superheat is greater than or equal to the first degree of superheat. In this embodiment, the degree of superheat of the air conditioning system is monitored after controlling the operation of the second preset number of indoor units. When the superheat degree is larger than or equal to the second superheat degree, the superheat degree of the air conditioning system is effectively improved by increasing the number of the operating indoor units, and further, the operating indoor units which are not set by a user are gradually closed, so that the normal operation of the air conditioning system is guaranteed, and the energy consumption of the air conditioning system is reduced. Meanwhile, the number of the running indoor units is gradually reduced, so that the running stability of the air conditioning system is further favorably ensured, and the compressor is prevented from being impacted due to sudden change of related parameters in a refrigerant loop, so that the service life of the compressor is prolonged. Specifically, the number of indoor units which are closed each time can be determined according to the change condition of the superheat degree, and if the superheat degree rises quickly, a plurality of indoor units can be closed at one time; if the superheat degree rises slowly, one indoor unit can be closed every time, and the time interval between two adjacent closing times is properly prolonged, so that the normal operation of the air conditioning system is guaranteed.
further, in the fourth embodiment of the present invention, as shown in fig. 5, after step S600, the air conditioning system control method further includes the steps of:
And step S800, when the superheat degree is smaller than the third superheat degree, controlling the air conditioning system to stop running and generating a prompt signal.
wherein the third degree of superheat is less than the second degree of superheat. In this embodiment, the degree of superheat of the air conditioning system is monitored after controlling the operation of the second preset number of indoor units. When the superheat degree is smaller than the third superheat degree, the effect of improving the superheat degree by increasing the number of the running indoor units is very limited, and under the condition, the air conditioning system may have other conditions, the air conditioning system is controlled to stop running so as to avoid the fault of the compressor caused by the excessively low superheat degree, and a prompt signal is generated so as to prompt related personnel to overhaul the air conditioning system.
In a fifth embodiment of the present invention, as shown in fig. 6, the environmental parameter includes an environmental temperature, and the setting parameter includes a setting temperature;
the step S200 includes:
step S210, judging whether the continuous shutdown time of the air conditioning system before the current operation is less than or equal to a second preset time;
if yes, executing step S221, and determining that the operation load is greater than or equal to the preset load;
when the continuous shutdown time of the air conditioning system before the secondary operation is less than or equal to the second preset time, the state change of the refrigerant in the system is usually small, so that the air conditioning system can be judged to be still in a working state meeting the condition that the operation load is greater than or equal to the preset load, and the normal operation of the indoor units with the first preset number can be controlled according to the setting of a user.
If not, executing step S222, and determining whether the absolute value of the difference between the current ambient temperature and the set temperature is greater than or equal to the preset temperature difference;
when the last shutdown time of the air conditioning system is long, the refrigerant in the refrigerant circuit usually recovers to the initial state, and at this time, it is necessary to determine the operating load of the air conditioning system according to the environmental parameters and the setting parameters. Specifically, the difference between the ambient temperature and the set temperature is first determined.
If yes, executing step S221, and determining that the operation load is greater than or equal to the preset load;
When the ambient temperature is greatly different from the set temperature, the air conditioning system is usually loaded more to regulate the temperature of the space region.
if not, executing the step S232, and judging whether the ratio of the sum of the capacities of the first preset number of indoor units to the capacity of the outdoor unit is greater than or equal to the preset ratio or not;
and when the difference between the ambient temperature and the set temperature is smaller, further judging the load of the air conditioning system according to the total capacity of the indoor unit to be operated.
If yes, executing step S221, and determining that the operation load is greater than or equal to the preset load;
When the ratio of the sum of the capacities of the first preset number of indoor units to the capacity of the outdoor unit is greater than or equal to the preset ratio, the load of the air conditioning system is correspondingly greater.
if not, step S242 is executed to determine that the operation load is smaller than the preset load.
on the contrary, if the ratio of the sum of the capacities of the first preset number of indoor units to the capacity of the outdoor unit is smaller than the preset ratio, the load of the air conditioning system is also smaller.
In a sixth embodiment of the present invention, the outdoor unit includes a compressor, as shown in fig. 7, step S300 includes;
step S310, acquiring a target frequency of the compressor according to the environmental parameters and the setting parameters;
step S320, controlling the compressor to run at a preset frequency;
wherein the preset frequency is greater than the target frequency. In this embodiment, when the operation of the second preset number of indoor units is controlled, the operation frequency of the compressor is increased, so that the compressor actually operates at the preset frequency higher than the target frequency, which is beneficial to further accelerating the circulation flow of the refrigerant in the refrigerant loop, thereby improving the superheat degree of the system and making the operation of the air conditioning system more stable.
in a seventh embodiment of the present invention, as shown in fig. 1, the air conditioning system includes a control valve 300 connected between the outdoor unit 100 and the indoor unit 200, the control valve 300 is disposed in one-to-one correspondence with the indoor unit 200, and the control valve 300 is typically an electronic expansion valve to control the flow rate of the refrigerant flowing into the indoor unit 200. As shown in fig. 8, step S300 includes:
Step S330, acquiring a first preset opening degree of control valves corresponding to a first preset number of indoor units according to the environmental parameters and the setting parameters;
step S340, controlling the control valves corresponding to the first preset number of indoor units to be opened at a first preset opening degree, and controlling the control valves corresponding to the third preset number of indoor units to be opened at a second preset opening degree.
the second preset opening degree is smaller than the first preset opening degree, and the third preset number is equal to the difference of the second preset number minus the first preset number. In this embodiment, the control valves corresponding to the first preset number of indoor units are controlled to be opened at the first preset opening degree, so as to ensure that the refrigerating capacity of the first preset number of indoor units meets the requirement of a user, and the control valves corresponding to the third preset number of indoor units are controlled to be opened at the second preset opening degree, so as to reduce the refrigerant flow in the indoor units which are opened for improving the superheat degree of the air conditioning system, on one hand, the energy consumption of the air conditioning system is reduced, and on the other hand, the generation of condensation on the indoor units can be avoided to a certain extent.
further, in the eighth embodiment of the present invention, as shown in fig. 9, step S300 further includes:
step S350, detecting whether a third preset number of indoor units generate condensation or not;
Step S361, when the third preset number of indoor units do not generate condensation, maintaining the opening degree of each control valve corresponding to the third preset number of indoor units;
Step S362, when condensation occurs in part of the indoor units in the third preset number of indoor units, reducing the opening of the control valve corresponding to the indoor unit which generates condensation, and increasing the opening of the control valve corresponding to the indoor unit which does not generate condensation;
and step 363, when the third preset number of indoor units generate condensation, reducing the opening degree of each control valve corresponding to the third preset number of indoor units, increasing the number of the running indoor units, and updating the second preset number and the third preset number according to the number of the running indoor units.
In the embodiment, the condensation generation on the indoor units which are opened for improving the superheat degree of the air conditioning system is monitored, and the opening degree of each control valve and the number of the opened indoor units are adjusted to reduce the condensation generation. Specifically, when the opening of the control valve is increased, the flow rate of the refrigerant in the corresponding indoor unit is large, the temperature is low, and when hot air in the environment meets the indoor unit, water vapor in the indoor unit meets condensation and is condensed to generate condensation, so that the user experience is influenced. Therefore, when condensation is generated, the opening degree of the corresponding control valve is reduced to reduce the refrigerant flow, and meanwhile, the shortage of superheat degree in the air conditioning system is made up by transferring part of the refrigerant flow to other indoor units or properly increasing the number of the opened indoor units, so that the normal operation of the air conditioning system is guaranteed.
In the ninth embodiment of the present invention, as shown in fig. 10, step S300 further includes:
Step S350, detecting whether a third preset number of indoor units generate condensation or not;
step S364, when no condensation is generated in the third preset number of indoor units, increasing the opening degree of a control valve corresponding to at least part of the third preset number of indoor units, reducing the number of the running indoor units, and updating the second preset number and the third preset number according to the number of the running indoor units;
step S362, when condensation occurs in part of the indoor units in the third preset number of indoor units, reducing the opening of the control valve corresponding to the indoor unit which generates condensation, and increasing the opening of the control valve corresponding to the indoor unit which does not generate condensation;
And step 363, when the third preset number of indoor units generate condensation, reducing the opening degree of each control valve corresponding to the third preset number of indoor units, increasing the number of the running indoor units, and updating the second preset number and the third preset number according to the number of the running indoor units.
In this embodiment, when no condensation is generated in each indoor unit, the number of the operating indoor units is reduced by increasing the opening degree of the control valve corresponding to at least a part of the third preset number of indoor units, so as to reduce the energy consumption of the operation of the air conditioning system. When the condensation is monitored to be generated on at least part of the indoor units, the opening of each control valve and the number of the opened indoor units are adjusted to reduce the generation of the condensation. Specifically, when the opening of the control valve is increased, the flow rate of the refrigerant in the corresponding indoor unit is large, the temperature is low, and when hot air in the environment meets the indoor unit, water vapor in the indoor unit meets condensation and is condensed to generate condensation, so that the user experience is influenced. Therefore, when condensation is generated, the opening degree of the corresponding control valve is reduced to reduce the refrigerant flow, and meanwhile, the shortage of superheat degree in the air conditioning system is made up by transferring part of the refrigerant flow to other indoor units or properly increasing the number of the opened indoor units, so that the normal operation of the air conditioning system is guaranteed.
the present invention further provides an air conditioning system, as shown in fig. 1, the air conditioning system includes an outdoor unit 100, at least two indoor units 200, a memory 400, a processor 500, and an air conditioning system control program stored in the memory 400 and operable on the processor 500.
Further, the air conditioning system includes control valves 300 connected between the outdoor unit 100 and the indoor units 200, and the control valves 300 are disposed in one-to-one correspondence with the indoor units 200 to control the refrigerant flow rate of each indoor unit 200, thereby controlling parameters such as cooling capacity of each indoor unit. The outdoor unit 100 includes a compressor 110 and a low pressure liquid tank 120, the low pressure liquid tank 120 is disposed at a suction end of the compressor 110, and the low pressure liquid tank 120 may store liquid refrigerant mixed in gaseous refrigerant before the refrigerant enters the compressor 110, so as to prevent the compressor from being hit by liquid. The superheat degree of the air conditioning system can also be determined by the liquid level of the liquid refrigerant in the low-pressure liquid storage tank 120, when the liquid level of the low-pressure liquid storage tank 120 is higher, the superheat degree of the air conditioning system is correspondingly lower, otherwise, when the liquid level of the low-pressure liquid storage tank 120 is lower, it is indicated that more refrigerants exist in a gaseous state, and the superheat degree of the air conditioning system is higher.
the processor 500 calls the air conditioning system control program stored in the memory 400 to perform the following operations:
acquiring environmental parameters and set parameters of a user;
acquiring the operating load of the air conditioning system according to the environmental parameters and the set parameters;
when the operation load is smaller than the lowest normal work load, controlling a second preset number of indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to the first superheat degree;
wherein the lowest normal workload corresponds to a first degree of superheat, the first predetermined number being less than the second predetermined number.
the processor 500 calls the air conditioning system control program stored in the memory 400, and after controlling the operation of the second preset number of indoor units, further performs the following operations:
Accumulating the operation duration of the indoor units of the second preset number;
and when the duration time is greater than or equal to a first preset time, controlling the indoor units with a first preset number to operate.
the processor 500 calls the air conditioning system control program stored in the memory 400, and after controlling the operation of the second preset number of indoor units, further performs the following operations:
acquiring the superheat degree of an air conditioning system;
When the superheat degree is larger than or equal to the second superheat degree, gradually reducing the number of the running indoor units according to the superheat degree until the number of the running indoor units reaches a first preset number;
Wherein the second degree of superheat is greater than or equal to the first degree of superheat.
the processor 500 calls the air conditioning system control program stored in the memory 400, and after the operation of acquiring the degree of superheat of the air conditioning system, further performs the following operations:
when the superheat degree is smaller than a third superheat degree, controlling the air conditioning system to stop running and generating a prompt signal;
Wherein the third degree of superheat is less than the second degree of superheat.
The environmental parameter comprises an environmental temperature, and the setting parameter comprises a setting temperature;
The operation of the processor 500 calling the air conditioning system control program stored in the memory 400 to obtain the operation load of the air conditioning system according to the environmental parameter and the setting parameter includes:
Judging whether the continuous shutdown time of the air conditioning system before the current operation is less than or equal to a second preset time or not;
if so, judging that the operation load is greater than or equal to the preset load;
if not, judging whether the absolute value of the difference between the current environment temperature and the set temperature is greater than or equal to the preset temperature difference;
if so, judging that the operation load is greater than or equal to the preset load;
if not, judging whether the ratio of the sum of the capacities of the indoor units with the first preset number to the capacity of the outdoor unit is greater than or equal to the preset ratio or not;
if so, judging that the operation load is greater than or equal to the preset load;
If not, the operation load is judged to be smaller than the preset load.
The outdoor unit comprises a compressor;
the operation of the processor 500 calling the air conditioning system control program stored in the memory 400, and controlling a second preset number of indoor units to operate when the operation load is less than the lowest normal work load, so that the degree of superheat of the air conditioning system is greater than or equal to the first degree of superheat, includes:
acquiring a target frequency of the compressor according to the environmental parameters and the set parameters;
controlling the compressor to operate at a preset frequency;
wherein the preset frequency is greater than the target frequency.
the air conditioning system comprises control valves connected between the outdoor unit and the indoor units, and the control valves and the indoor units are arranged in a one-to-one correspondence manner;
The operation of the processor 500 calling the air conditioning system control program stored in the memory 400, and controlling a second preset number of indoor units to operate when the operation load is less than the lowest normal work load, so that the degree of superheat of the air conditioning system is greater than or equal to the first degree of superheat, includes:
Acquiring a first preset opening degree of control valves corresponding to a first preset number of indoor units according to the environmental parameters and the setting parameters;
Controlling control valves corresponding to a first preset number of indoor units to be opened at a first preset opening degree, and controlling control valves corresponding to a third preset number of indoor units to be opened at a second preset opening degree;
the second preset opening degree is smaller than the first preset opening degree, and the third preset number is equal to the difference of the second preset number minus the first preset number.
the operation of the processor 500 calling the air conditioning system control program stored in the memory 400, and controlling a second preset number of indoor units to operate when the operation load is less than the lowest normal work load, so that the degree of superheat of the air conditioning system is greater than or equal to the first degree of superheat, further includes:
Detecting whether a third preset number of indoor units generate condensation or not;
when the third preset number of indoor units do not generate condensation, maintaining the opening degree of each control valve corresponding to the third preset number of indoor units; or increasing the opening degree of control valves at least partially corresponding to the third preset number of indoor units, reducing the number of the running indoor units, and updating the second preset number and the third preset number according to the number of the running indoor units;
when condensation is generated in a part of the indoor units in the third preset number of indoor units, the opening degree of a control valve corresponding to the indoor unit generating the condensation is reduced, and the opening degree of a control valve corresponding to the indoor unit not generating the condensation is increased;
when the third preset number of indoor units generate condensation, the opening degree of each control valve corresponding to the third preset number of indoor units is reduced, the number of the running indoor units is increased, and the second preset number and the third preset number are updated according to the number of the running indoor units.
the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. the control method of the air conditioning system is characterized in that the air conditioning system comprises an outdoor unit and at least two indoor units;
the air conditioning system control method includes the steps of:
acquiring environmental parameters and setting parameters of a user, wherein the setting parameters of the user comprise parameters of indoor units set to be started by the user, and the number of the indoor units set to be started by the user is recorded as a first preset number;
acquiring the operating load of the air conditioning system according to the environmental parameters and the set parameters;
when the operation load is smaller than the lowest normal work load, controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree;
wherein the lowest normal workload corresponds to the first degree of superheat, the first predetermined number being less than the second predetermined number.
2. the air conditioning system control method as claimed in claim 1, wherein after the step of controlling the operation of the second preset number of the indoor units, the air conditioning system control method further comprises the steps of:
Accumulating the running duration of a second preset number of the indoor units;
And when the duration time is greater than or equal to a first preset time, controlling the indoor units of a first preset number to operate.
3. the air conditioning system control method as claimed in claim 1, wherein after the step of controlling the operation of the second preset number of the indoor units, the air conditioning system control method further comprises the steps of:
acquiring the superheat degree of the air conditioning system;
when the superheat degree is larger than or equal to a second superheat degree, gradually reducing the number of the running indoor units according to the superheat degree until the number of the running indoor units reaches the first preset number;
Wherein the second degree of superheat is greater than or equal to the first degree of superheat.
4. the air conditioning system control method as claimed in claim 3, wherein after the step of acquiring the degree of superheat of the air conditioning system, the air conditioning system control method further comprises the steps of:
when the superheat degree is smaller than a third superheat degree, controlling the air conditioning system to stop running and generating a prompt signal;
wherein the third degree of superheat is less than the second degree of superheat.
5. the air conditioning system control method according to any one of claims 1 to 4, wherein the environmental parameter includes an environmental temperature, and the set parameter includes a set temperature;
the step of obtaining the operating load of the air conditioning system according to the environmental parameters and the set parameters comprises the following steps:
Judging whether the continuous shutdown time of the air conditioning system before the current operation is less than or equal to a second preset time or not;
if so, determining that the operation load is greater than or equal to the lowest normal work load;
If not, judging whether the absolute value of the difference between the current environment temperature and the set temperature is greater than or equal to a preset temperature difference;
if so, determining that the operation load is greater than or equal to the lowest normal work load;
If not, judging whether the ratio of the sum of the capacities of the indoor units of a first preset number to the capacity of the outdoor unit is greater than or equal to a preset ratio or not;
if so, determining that the operation load is greater than or equal to the lowest normal work load;
and if not, judging that the operation load is less than the lowest normal work load.
6. The air conditioning system control method of any one of claims 1 to 4, wherein the outdoor unit includes a compressor;
when the operation load is smaller than the lowest normal work load, the step of controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree comprises the following steps:
acquiring a target frequency of the compressor according to the environmental parameters and the set parameters;
Controlling the compressor to operate at a preset frequency;
wherein the preset frequency is greater than the target frequency.
7. The air conditioning system control method according to any one of claims 1 to 4, wherein the air conditioning system includes control valves connected between the outdoor unit and the indoor units, the control valves being provided in one-to-one correspondence with the indoor units;
when the operation load is smaller than the lowest normal work load, the step of controlling a second preset number of the indoor units to operate so that the superheat degree of the air conditioning system is larger than or equal to a first superheat degree comprises the following steps:
acquiring a first preset opening degree of the control valve corresponding to a first preset number of indoor units according to the environment parameter and the set parameter;
controlling the control valves corresponding to the indoor units with the first preset number to be opened at a first preset opening degree, and controlling the control valves corresponding to the indoor units with the third preset number to be opened at a second preset opening degree;
the second preset opening degree is smaller than the first preset opening degree, and the third preset number is equal to the difference between the second preset number and the first preset number.
8. The air conditioning system controlling method as claimed in claim 7, wherein the step of controlling a second preset number of the indoor units to operate so that the degree of superheat of the air conditioning system is greater than or equal to a first degree of superheat when the operation load is less than a lowest normal operation load further comprises:
Detecting whether the third preset number of indoor units generate condensation or not;
When no condensation is generated in the third preset number of indoor units, maintaining the opening degree of each control valve corresponding to the third preset number of indoor units; or increasing the opening degree of the control valve corresponding to at least part of the indoor units with a third preset number, reducing the number of the running indoor units, and updating the second preset number and the third preset number according to the number of the running indoor units;
when condensation is generated in a part of the indoor units in a third preset number of indoor units, reducing the opening of a control valve corresponding to the indoor unit generating the condensation, and increasing the opening of a control valve corresponding to the indoor unit not generating the condensation;
When the third preset number of indoor units generate condensation, the opening degree of each control valve corresponding to the third preset number of indoor units is reduced, the number of the running indoor units is increased, and the second preset number and the third preset number are updated according to the number of the running indoor units.
9. an air conditioning system comprising an outdoor unit, at least two indoor units, a memory, a processor and an air conditioning system control program stored in the memory and executable on the processor, wherein the air conditioning system control program when executed by the processor implements the steps of the air conditioning system control method of any one of claims 1 to 8.
10. The air conditioning system as claimed in claim 9, wherein the air conditioning system includes control valves connected between the outdoor unit and the indoor units, the control valves being provided in one-to-one correspondence with the indoor units;
The outdoor unit comprises a compressor and a low-pressure liquid storage tank, and the low-pressure liquid storage tank is arranged at a suction end of the compressor.
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| CN111595001B (en) * | 2020-05-18 | 2022-07-19 | 广东美的暖通设备有限公司 | Air conditioning system, control method thereof, control device thereof and readable storage medium |
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| CN1707189A (en) * | 2004-06-07 | 2005-12-14 | 无锡小天鹅中央空调有限公司 | Multiple air conditioner indoor machine operating control method |
| CN106288488A (en) * | 2016-08-29 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner system and the control method of air-conditioner system |
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| CN1707189A (en) * | 2004-06-07 | 2005-12-14 | 无锡小天鹅中央空调有限公司 | Multiple air conditioner indoor machine operating control method |
| CN106288488A (en) * | 2016-08-29 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner system and the control method of air-conditioner system |
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