CN108019890B - Air conditioner energy efficiency control method and device and air conditioner system - Google Patents
Air conditioner energy efficiency control method and device and air conditioner system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000003507 refrigerant Substances 0.000 claims abstract description 98
- 239000007788 liquid Substances 0.000 claims abstract description 61
- 238000005057 refrigeration Methods 0.000 claims description 21
- 238000004378 air conditioning Methods 0.000 claims description 18
- 238000004781 supercooling Methods 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 238000013021 overheating Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 description 6
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Abstract
The invention discloses an air conditioner energy efficiency control method, an air conditioner energy efficiency control device and an air conditioner system, wherein the method comprises the following steps: sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device; acquiring the energy efficiency variation of the unit according to a preset time interval; and sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the stored refrigerant and the discharged refrigerant of the liquid accumulator. The invention optimizes the refrigerant circulation quantity and improves the energy efficiency of the unit.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner energy efficiency control method and device and an air conditioner system.
Background
Based on the basic national conditions of the energy industry in China, the development and utilization of clean, safe and efficient energy and energy utilization devices are more and more emphasized in the energy policy in China. The renewable energy is vigorously developed, and the renewable energy is an important aspect of the energy development strategy in China instead of the conventional fossil fuel energy. The heat pump technology is one of effective technologies utilizing low-temperature renewable energy sources, can well solve the contradiction between energy consumption and environmental protection, and conforms to the requirements of scientific energy utilization in modern society. The heat pump is an energy-saving device which uses high-level energy to make heat flow from a low-level heat source to a high-level heat source, and the heat supplied to a user is the sum of the consumed high-level heat energy and the absorbed low-level heat energy. Practice proves that the heat pump heating technology can achieve optimal combination of energy efficiency and benefit, and is a model for scientifically configuring energy.
However, with the popularization and application of the air conditioning system, the consumption of energy is not reduced, and the application and practical value of the air conditioning system are greatly reduced. And the energy saving and the optimization control work of the air conditioning system are very important. The reason that the total energy consumption of the existing heating ventilation air conditioner is high is generally summarized as low operation efficiency and high energy consumption of the system. With the progress of the technology, the traditional air-conditioning system is developed from fixed frequency to variable frequency, so that the air conditioner can adjust the frequency of the compressor per se according to different loads, and the aim of improving the energy efficiency is fulfilled; however, the common frequency conversion system only changes the operating frequency of the unit, and the refrigerant quantity in the whole air conditioning system is unchanged under different loads, which seriously affects the improvement of the energy efficiency of the air conditioner. Along with the requirement of people on the energy efficiency of the air conditioner is higher and higher, the energy efficiency standard of each country is also continuously improved, the energy consumption can be reduced by improving the energy efficiency, and the comfort experience of a user can be improved.
Therefore, how to optimize the refrigerant circulation amount and improve the energy efficiency of the unit becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention provides an air conditioner energy efficiency control method, an air conditioner energy efficiency control device and an air conditioner system, which are used for optimizing at least refrigerant circulation quantity and improving the energy efficiency of a unit.
To solve the above technical problem, according to a first aspect of the embodiments of the present disclosure, the present invention provides an air conditioner energy efficiency control method, including:
sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device; acquiring the energy efficiency variation of the unit according to a preset time interval; and sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the stored refrigerant and the discharged refrigerant of the liquid accumulator.
Optionally, the sending the switching control signal to the control valve according to the magnitude of the energy efficiency variation includes: judging whether the energy efficiency variation is larger than a preset value; and if the energy efficiency variation is larger than the preset value, sending a maintaining signal for representing the maintenance of the current channel state to the control valve.
Optionally, if the energy efficiency variation is smaller than a preset value, a switching signal for indicating to switch the current channel state is sent to the control valve.
Optionally, after sending the switching control signal to the control valve according to the magnitude of the energy efficiency change amount, the method further includes: judging whether the times of a channel state switching period reach preset times or not, wherein the channel state switching period is from the time when a liquid storage device stores a refrigerant channel to the time when a refrigerant channel is closed to discharge the refrigerant; and if the number of times of the channel state switching period reaches the preset number of times, sending a shutoff signal for representing the shutoff of the control valve to the control valve so as to shut off the liquid storage device storage refrigerant channel and the discharge refrigerant channel.
Optionally, after sending a shut-off signal to the control valve for characterizing the shut-off of the control valve, the method further includes: obtaining current refrigeration parameters of an internal machine; and outputting an opening degree adjusting signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameters.
Optionally, the unit is currently operating in a cooling mode; the method for acquiring the current refrigeration parameters of the internal machine comprises the following steps: acquiring the current overheating value of the internal machine; outputting an opening degree adjustment signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameter comprises: judging whether the superheat value is within a preset interval or not; if the superheat value exceeds the maximum value of the preset interval, outputting an adjusting signal for reducing the opening of the expansion valve to an expansion valve of the indoor unit so as to enable the adjusted superheat value to be in the preset interval; and if the superheat value is smaller than the minimum value of the preset interval, outputting an adjusting signal for increasing the opening of the expansion valve to an expansion valve of the indoor unit so as to enable the adjusted superheat value to be in the preset interval.
Optionally, the unit is currently operating in a heating mode; the method for acquiring the current refrigeration parameters of the internal machine comprises the following steps: acquiring the current supercooling value of the internal machine; outputting an opening degree adjustment signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameter comprises: judging whether the supercooling value is within a preset interval or not; if the supercooling value exceeds the maximum value of the preset interval, respectively outputting adjusting signals for reducing the opening degree of the expansion valve of the inner machine and the opening degree of the expansion valve of the outer machine to the expansion valve of the inner machine and the expansion valve of the outer machine so as to enable the adjusted superheat value to be in the preset interval; if the supercooling value is smaller than the minimum value of the preset interval, adjusting signals for increasing the opening degree of the expansion valve of the inner machine and adjusting the opening degree of the expansion valve of the outer machine are respectively output to the expansion valve of the inner machine and the expansion valve of the outer machine, so that the adjusted overheating value is in the preset interval.
According to a second aspect of the embodiments of the present disclosure, there is provided an air conditioner energy efficiency control apparatus including:
the initial module is used for sending a storage control signal to the control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to the liquid storage device; the energy efficiency acquisition module is used for acquiring the energy efficiency variation of the unit according to a preset time interval; and the switching module is used for sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the liquid storage device for storing the refrigerant and discharging the refrigerant.
According to a third aspect of embodiments of the present disclosure, there is provided a computer apparatus comprising: comprising a processor for executing a computer program stored in a memory to implement the method of:
sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device; acquiring the energy efficiency variation of the unit according to a preset time interval; and sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the stored refrigerant and the discharged refrigerant of the liquid accumulator.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having a computer program stored thereon, a processor for executing the computer program stored in the storage medium to implement the following method:
sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device; acquiring the energy efficiency variation of the unit according to a preset time interval; and sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the stored refrigerant and the discharged refrigerant of the liquid accumulator.
According to a fifth aspect of an embodiment of the present disclosure, there is provided an air conditioning system including:
the indoor unit and the outdoor unit are used for realizing indoor temperature adjustment; the liquid storage device is used for providing a refrigerant for the inner machine and the outer machine; the control valve is used for switching on or switching off a passage for storing the refrigerant and discharging the refrigerant between the liquid storage device and the inner machine as well as between the outer machine and the inner machine; the electronic expansion valve is used for respectively adjusting the opening degrees of the inner machine passage and the outer machine passage; a controller for implementing the method of any one of the above first aspects.
According to the invention, the storage control signal is sent to the control valve after the unit is started to operate, the channel for storing the refrigerant in the liquid storage device is conducted, then, the energy efficiency variation of the unit is obtained, and the channel states of the refrigerant stored in the liquid storage device and the refrigerant discharged from the liquid storage device are switched according to the energy efficiency variation, so that the refrigerant is stored and released aiming at the energy efficiency variation through the liquid storage device and the control valve, and the refrigerant quantity circulating in the air-conditioning system can be adjusted, therefore, the energy efficiency of the system can be adjusted in real time, the unit operates under the optimized energy efficiency, the energy consumption is reduced, then, the refrigeration and heating effects of the air-conditioning unit are improved, and the.
Drawings
FIG. 1 is a flow chart of an air conditioner energy efficiency control method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioner energy efficiency control device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In order to optimize the refrigerant circulation amount and improve the energy efficiency of the unit, the present embodiment discloses an air conditioner energy efficiency control method, please refer to fig. 1, which is a flowchart of the air conditioner energy efficiency control method of the present embodiment, and the air conditioner energy efficiency control method includes:
and S100, sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit. In this embodiment, the unit can be started and operated in a cooling mode and also in a heating mode. In a specific embodiment, when the unit starts to operate, the storage control signal is sent to the control valve according to the start trigger signal for starting to operate, and the passage for storing the refrigerant in the liquid storage device is conducted, so that the liquid storage device works in a liquid storage state. Specifically, please refer to fig. 2, which is a schematic diagram of a structural principle of an air conditioning system disclosed in this embodiment, the air conditioning system includes: the indoor unit comprises an indoor unit 1, an outdoor unit 2, a liquid storage device 3, control valves (41, 42, 43 and 44) and electronic expansion valves (51 and 52), wherein the indoor unit 1 and the outdoor unit 2 are used for achieving indoor temperature regulation; the liquid accumulator 3 is used for providing a refrigerant for the inner machine and the outer machine; the control valves (41, 42, 43, 44) are used for switching on or switching off the channels between the liquid storage device and the inner machine and between the outer machine for storing the refrigerant and discharging the refrigerant; the electronic expansion valves (51, 52) are used for respectively adjusting the opening degrees of the internal machine passage and the external machine passage. In this embodiment, according to the start trigger signal, the control valve 42 is turned on, and the control valves 41 and 43 are turned off, so that the redundant refrigerant in the system is stored in the reservoir 3 through the control valve 42. In some embodiments, other valve bodies may be provided as desired, such as the four-way valve 8, the shut-off valves 91, 92, the check valve 93, and the like.
And step S200, acquiring the energy efficiency variation of the unit according to a preset time interval. In this embodiment, the preset time interval t1 may be determined empirically or obtained through theoretical analysis. Such as: when the system runs at 100% load, the difference between the optimal refrigerant quantity required by the system running at 100% load and the refrigerant quantity in the system is small, so that the time required by each liquid storage and drainage action is short, and the preset time interval t1 is 2 min; when the system runs at 50% load, because the difference between the optimal refrigerant quantity required by the system running at 50% load and the refrigerant quantity in the system is large, the time required by each liquid storage and drainage action is short, and the preset time interval t1 is 5 min; when the system is operated at 25% load, the difference between the optimal refrigerant quantity required by the system at 25% load operation and the refrigerant quantity in the system is larger, so that the time required by each liquid storage and discharge action is shorter, and the preset time interval t1 is 10 min. It should be noted that the specific values given in the above examples are not to be understood as constituting a limitation to the technical solution of the present application, but only to give an exemplary indication to the skilled person when determining the preset time interval t 1. In this embodiment, an energy efficiency variation Δ a of the unit is obtained according to a preset time interval t1, where the energy efficiency variation Δ a is an energy efficiency variation of a current sampling point relative to an energy efficiency variation of a previous sampling point.
And step S300, sending a switching control signal to the control valve according to the energy efficiency variation. In this embodiment, after the energy efficiency variation Δ a of the unit is obtained at preset time intervals, a variation trend of the energy efficiency variation Δ a may be determined, for example, when the energy efficiency is in an increasing trend, the current passage state may be maintained, and when the energy efficiency is in a decreasing trend, the passage state may be switched, specifically, the passage states of the liquid reservoir for storing the refrigerant and discharging the refrigerant are switched according to the magnitude of the energy efficiency variation. Thereby, an optimization of energy efficiency can be achieved.
In a specific embodiment, when step S300 is executed, sending the switching control signal to the control valve according to the magnitude of the energy efficiency variation includes: judging whether the energy efficiency variation is larger than a preset value; and if the energy efficiency variation is larger than the preset value, sending a maintaining signal for representing the maintenance of the current channel state to the control valve. In this embodiment, the preset value may be, for example, 0, specifically, if the energy efficiency variation Δ a is greater than or equal to 0, it indicates that the system energy efficiency is increased, and the liquid storage operation is continued to store the refrigerant in the system into the liquid storage device.
Of course, if the energy efficiency variation is smaller than the preset value, a switching signal for indicating the current channel state is switched is sent to the control valve. Specifically, referring to fig. 2, if it is detected that the energy efficiency variation Δ a is smaller than 0, which indicates that the system energy efficiency is reduced, the liquid discharge operation is performed, at this time, the control valve 42 is turned off, the control valves 41 and 43 are turned on, the gaseous refrigerant coming out from the discharge end of the compressor 6 flows to the liquid reservoir 3 through the oil separator 7 and the control valve 41, and the refrigerant stored in the liquid reservoir 3 is discharged to the suction side of the compressor 6 through the control valve 42 from the bottom of the liquid reservoir by pressure, so that the refrigerant circulation amount in the system is increased.
It should be noted that after the current path state is switched, the energy efficiency variation Δ a of the unit may be continuously obtained according to a preset time interval, if the energy efficiency variation Δ a is greater than or equal to 0, it indicates that the system energy efficiency is increased, and the current path state is continuously maintained; and if the energy efficiency change quantity delta a is smaller than 0, which indicates that the energy efficiency of the system is reduced, switching the current passage state (such as liquid drainage) to another passage state (such as liquid storage). That is, the state of the passage of the liquid storage and the liquid discharge is switched according to the magnitude of the energy efficiency change Δ a.
In an alternative embodiment, after performing step S300, the method further includes:
step S400, determining whether the number of times of the channel state switching period reaches a preset number of times. In this embodiment, the period of the channel state switching is from when the refrigerant storage channel of the accumulator is turned on to when the refrigerant discharge channel is turned off. That is, a cycle of switching the passage state is from the time when the present accumulator storage refrigerant passage is turned on to the time when the next accumulator storage refrigerant passage is turned on. In a specific embodiment, it is determined whether the number n of times of the channel state switching period is greater than a preset number m, and if the number of times of the channel state switching period reaches the preset number (n > m), step S500 is executed; and if the number of times of the channel state switching cycle does not reach the preset number of times, continuously returning to execute the step S200, the step S300 and the step S400.
Step S500, a shut-off signal for indicating the shut-off of the control valve is sent to the control valve. Thereby, the accumulator storage refrigerant passage and the discharge refrigerant passage are shut off. Specifically, the control valves 41, 42, and 43 are closed, thereby completing the operation of the storage and discharge regulation of the refrigerant, so that the refrigerant amount approaches the optimum energy-efficient operation.
After the adjustment of the steps, the rough adjustment of the energy efficiency optimization operation of the system is completed. In order to further improve the system energy efficiency and perform fine adjustment on the system refrigerant circulation amount, in an optional embodiment, after performing step S500, the method may further include: obtaining current refrigeration parameters of an internal machine; and outputting an opening degree adjusting signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameters. In this embodiment, the refrigeration parameter includes a degree of superheat or a degree of supercooling, specifically:
in one embodiment, the unit is currently operating in a cooling mode; the method for acquiring the current refrigeration parameters of the internal machine comprises the following steps: acquiring the current overheating value kt of the internal machine; outputting an opening degree adjustment signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameter comprises: judging whether the superheat value kt is within a preset interval or not; if the superheat value exceeds the maximum value of the preset interval, outputting an adjusting signal for reducing the opening of the expansion valve to an expansion valve of the indoor unit so as to enable the adjusted superheat value to be in the preset interval; and if the superheat value is smaller than the minimum value of the preset interval, outputting an adjusting signal for increasing the opening of the expansion valve to an expansion valve of the indoor unit so as to enable the adjusted superheat value to be in the preset interval. Specifically, a preset interval can be determined empirically, for example, the preset interval of the superheat degree is [ k-2, k +2], where k is a positive integer, and if the heat value kt belongs to [ k-2, k +2], it is determined that the refrigerant flowing through the indoor unit at this time is uniformly distributed and appropriate, and the energy efficiency is high; if the superheat degree kt belongs to (— infinity, k-2), the superheat degree is smaller than the minimum value of the preset interval, so that the amount of the refrigerant flowing through the indoor unit at the moment can be judged to be too large, and the opening p of the electronic expansion valve 51 corresponding to the indoor unit is reduced until kt belongs to [ k-2, k +2 ]; if the degree of superheat kt ∈ (k + 2), the degree of superheat exceeds the maximum value of the preset interval, and thus it can be determined that the amount of refrigerant flowing through the indoor unit at this time is small, and the opening p of the electronic expansion valve 51 corresponding to the indoor unit is increased until kt ∈ [ k-2, k +2 ]. Through the control, the refrigerant circulation volume of the system is in an optimal state, and the unit operates under the optimal energy efficiency.
In another embodiment, the unit is currently operating in a heating mode; the method for acquiring the current refrigeration parameters of the internal machine comprises the following steps: acquiring the current supercooling value of the internal machine; outputting an opening degree adjustment signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameter comprises: judging whether the supercooling value is within a preset interval or not; if the supercooling value exceeds the maximum value of the preset interval, respectively outputting adjusting signals for reducing the opening degree of the expansion valve of the inner machine and the opening degree of the expansion valve of the outer machine to the expansion valve of the inner machine and the expansion valve of the outer machine so as to enable the adjusted superheat value to be in the preset interval; if the supercooling value is smaller than the minimum value of the preset interval, adjusting signals for increasing the opening degree of the expansion valve of the inner machine and adjusting the opening degree of the expansion valve of the outer machine are respectively output to the expansion valve of the inner machine and the expansion valve of the outer machine, so that the adjusted overheating value is in the preset interval. Specifically, a preset interval can be determined empirically, for example, the preset interval of the supercooling degree is [ k-2, k +2], where k is a positive integer, and if the supercooling degree jt belongs to [ k-2, k +2], it is determined that the refrigerant flowing through the indoor unit at this time is uniformly distributed and in a proper amount, and the energy efficiency is high; if the supercooling degree jt belongs to (— infinity, k-2), the superheat value is smaller than the minimum value of the preset interval, so that the amount of the refrigerant flowing through the indoor unit at the moment can be judged to be excessive, and the opening p1 of the electronic expansion valve 51 corresponding to the indoor unit and the opening p2 of the electronic expansion valve 52 corresponding to the outdoor unit are reduced until jt belongs to [ k-2, k +2 ]; if the supercooling degree jt ∈ (k + 2), the supercooling degree value exceeds the maximum value of the preset interval, and thus it can be determined that the amount of refrigerant flowing through the indoor unit is small at this time, and the opening degree p1 of the electronic expansion valve 51 corresponding to the indoor unit and the opening degree p2 of the electronic expansion valve 52 corresponding to the outdoor unit are increased until jt ∈ [ k-2, k +2 ]. Through the control, the refrigerant circulation volume of the system is in an optimal state, and the unit operates under the optimal energy efficiency.
Fig. 3 is a schematic structural diagram of the air-conditioning energy efficiency control device disclosed in this embodiment, where the air-conditioning energy efficiency control device includes: an initial module 100, an energy efficiency acquisition module 200 and a switching module 300, wherein:
the initial module 100 is configured to send a storage control signal to a control valve according to a start trigger signal for characterizing the start operation of the unit, so as to open a path for storing a refrigerant in a liquid reservoir; the energy efficiency acquisition module 200 is used for acquiring the energy efficiency variation of the unit according to a preset time interval; the switching module 300 is configured to send a switching control signal to the control valve according to the energy efficiency variation, so as to switch the passage states of the refrigerant stored in the liquid reservoir and the refrigerant discharged from the liquid reservoir.
Referring to fig. 2, a schematic structural diagram of an air conditioning system is shown, where the air conditioning system includes: the indoor unit 1, the outdoor unit 2, the liquid reservoir 3, the control valves (41, 42, 43, 44), the electronic expansion valves (51, 52) and the controller (reference numerals are not shown in the figure), and specifically, the functions of the respective components can be referred to the above description, and are not described again. In this embodiment, the controller is configured to implement the method disclosed in any of the above embodiments.
According to the invention, the storage control signal is sent to the control valve after the unit is started to operate, the channel for storing the refrigerant in the liquid storage device is conducted, then, the energy efficiency variation of the unit is obtained, and the channel states of the refrigerant stored in the liquid storage device and the refrigerant discharged from the liquid storage device are switched according to the energy efficiency variation, so that the refrigerant is stored and released aiming at the energy efficiency variation through the liquid storage device and the control valve, and the refrigerant quantity circulating in the air-conditioning system can be adjusted, therefore, the energy efficiency of the system can be adjusted in real time, the unit operates under the optimized energy efficiency, the energy consumption is reduced, then, the refrigeration and heating effects of the air-conditioning unit are improved, and the.
Furthermore, an embodiment of the present invention further provides a computer apparatus, including a processor, where the processor is configured to execute a computer program stored in a memory to implement the following method: sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device; acquiring the energy efficiency variation of the unit according to a preset time interval; and sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the stored refrigerant and the discharged refrigerant of the liquid accumulator.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like. The computer processor is used to execute a computer program stored in a storage medium to implement the following method: sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device; acquiring the energy efficiency variation of the unit according to a preset time interval; and sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the stored refrigerant and the discharged refrigerant of the liquid accumulator.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. An air conditioner energy efficiency control method is characterized by comprising the following steps:
sending a storage control signal to a control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to a liquid storage device;
acquiring the energy efficiency variation of the unit according to a preset time interval;
sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the liquid accumulator for storing the refrigerant and discharging the refrigerant;
which comprises the following steps: judging whether the energy efficiency variation is larger than a preset value; if the energy efficiency variation is larger than a preset value, sending a maintaining signal for representing and maintaining the current path state to the control valve; if the energy efficiency variation is smaller than a preset value, sending a switching signal for representing the current channel switching state to the control valve;
after the switching control signal is sent to the control valve according to the energy efficiency variation, the method further includes: judging whether the number of times of the channel state switching period reaches a preset number of times, wherein the channel state switching period is from the time when the liquid reservoir stores the refrigerant channel to the time when the liquid reservoir discharges the refrigerant channel; and if the number of times of the channel state switching period reaches a preset number, sending a shutoff signal for indicating to shut off the control valve to a control valve so as to shut off the liquid storage device storage refrigerant channel and the discharge refrigerant channel.
2. The air conditioner energy efficiency control method according to claim 1, further comprising, after the sending of the shut-off signal indicating the shut-off of the control valve to the control valve:
obtaining current refrigeration parameters of an internal machine;
and outputting an opening degree adjusting signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameters.
3. The air conditioner energy efficiency control method according to claim 2, wherein the unit is currently operating in a cooling mode;
the obtaining of the current refrigeration parameters of the internal machine comprises the following steps: acquiring the current overheating value of the internal machine;
the outputting an opening degree adjusting signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameter comprises:
judging whether the superheat value is within a preset interval or not;
if the superheat value exceeds the maximum value of a preset interval, outputting an adjusting signal for reducing the opening degree of the expansion valve to an expansion valve of the indoor unit so as to enable the adjusted superheat value to be in the preset interval;
and if the superheat value is smaller than the minimum value of a preset interval, outputting an adjusting signal for increasing the opening degree of the expansion valve to an expansion valve of the internal machine so as to enable the adjusted superheat value to be in the preset interval.
4. The air conditioner energy efficiency control method according to claim 3, wherein the unit is currently operating in a heating mode;
the obtaining of the current refrigeration parameters of the internal machine comprises the following steps: acquiring the current supercooling value of the internal machine;
the outputting an opening degree adjusting signal for adjusting the opening degree of the expansion valve to the expansion valve according to the refrigeration parameter comprises:
judging whether the supercooling value is within a preset interval or not;
if the supercooling value exceeds the maximum value of a preset interval, respectively outputting adjusting signals for reducing the opening degree of the expansion valve of the inner machine and reducing the opening degree of the expansion valve of the outer machine to the expansion valve of the inner machine and the expansion valve of the outer machine so as to enable the adjusted superheat value to be in the preset interval;
if the supercooling value is smaller than the minimum value of the preset interval, adjusting signals for increasing the opening degree of the expansion valve of the inner machine and increasing the opening degree of the expansion valve of the outer machine are respectively output to the expansion valve of the inner machine and the expansion valve of the outer machine, so that the adjusted superheat value is in the preset interval.
5. An air conditioner energy efficiency control device, characterized by comprising:
the initial module is used for sending a storage control signal to the control valve according to a starting trigger signal for representing the starting operation of the unit so as to conduct a channel for storing a refrigerant to the liquid storage device;
the energy efficiency acquisition module is used for acquiring the energy efficiency variation of the unit according to a preset time interval;
the switching module is used for sending a switching control signal to the control valve according to the energy efficiency variation so as to switch the passage states of the liquid storage device for storing the refrigerant and discharging the refrigerant; then, judging whether the number of times of the channel state switching period reaches a preset number of times, wherein the channel state switching period is from the time when the liquid reservoir storage refrigerant channel is switched on to the time when the discharge refrigerant channel is closed; if the number of times of the channel state switching period reaches a preset number of times, sending a shutoff signal for indicating to shut off the control valve to shut off the liquid storage device to store a refrigerant channel and discharge the refrigerant channel;
which comprises the following steps: judging whether the energy efficiency variation is larger than a preset value; if the energy efficiency variation is larger than a preset value, sending a maintaining signal for representing and maintaining the current path state to the control valve; and if the energy efficiency variation is smaller than a preset value, sending a switching signal for representing the current channel switching state to the control valve.
6. A computer arrangement comprising a processor for executing a computer program stored in a memory to implement the method of any of claims 1-4.
7. A computer-readable storage medium, on which a computer program is stored, characterized in that a processor is adapted to execute the computer program stored in the storage medium to implement the method according to any of claims 1-4.
8. An air conditioning system, comprising:
the indoor unit and the outdoor unit are used for realizing indoor temperature adjustment;
the liquid storage device is used for providing a refrigerant for the inner machine and the outer machine;
the control valve is used for switching on or switching off a passage for storing the refrigerant and discharging the refrigerant between the liquid storage device and the inner machine as well as between the outer machine and the inner machine;
the electronic expansion valve is used for respectively adjusting the opening degrees of the inner machine passage and the outer machine passage;
a controller for implementing the method of any one of claims 1 to 4.
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| CN108518808B (en) * | 2018-06-12 | 2020-08-04 | 广东美的暖通设备有限公司 | Control method and device of air conditioner and air conditioner with control device |
| CN112944617B (en) * | 2021-01-29 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner and air conditioner |
| CN112944613B (en) * | 2021-01-29 | 2022-11-15 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner and air conditioner |
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