CN110906501A - Control method and system and air conditioner - Google Patents
Control method and system and air conditioner Download PDFInfo
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- CN110906501A CN110906501A CN201911272295.7A CN201911272295A CN110906501A CN 110906501 A CN110906501 A CN 110906501A CN 201911272295 A CN201911272295 A CN 201911272295A CN 110906501 A CN110906501 A CN 110906501A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention provides a control method, a control system and an air conditioner, which are used for controlling the starting state of a fixed-frequency compressor of the air conditioner, and the method comprises the following steps: acquiring the actual high-pressure of the air conditioner at the current moment; judging whether the actual high-pressure is larger than the target load-shedding high-pressure of the air conditioner or not, and if so, closing the fixed-frequency compressor; when the fixed-frequency compressor is started again, recording the first time required for the actual high-pressure to reach the target load shedding high-pressure again; and judging whether the first time exceeds a preset value, if not, adjusting the target loading high-pressure of the air conditioner, and keeping the actual high-pressure to be between the adjusted target loading high-pressure and the target unloading high-pressure, wherein the second time exceeds the preset value. The method, the system and the air conditioner can avoid frequent start and stop of the fixed-frequency compressor, and improve the service life of the fixed-frequency compressor and the comfort of users.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and system and an air conditioner.
Background
For a variable-frequency and fixed-frequency multi-compressor air conditioning system, under a high-temperature working condition, the system load demand is large, the compressor outputs according to the system load demand, but the high-pressure is high at the moment, in order to ensure the reliability of the system and a compressor module, the traditional control is to execute frequency reduction or reduce the load output, and after the high-pressure frequency limit is removed, the compressor load is normally loaded.
However, the target high-pressure loaded by the compressor is usually not changed, the frequency of the fixed-frequency compressor cannot be adjusted, only the starting and closing states exist, the high-pressure loaded compressor is allowed to be started when the air conditioner reaches the target loading high-pressure, and the high-pressure unloaded compressor is closed when the air conditioner reaches the target unloading high-pressure. If the compressor runs under the high-temperature working condition, the actual high-pressure changes constantly, the compressor needs to be loaded or unloaded to meet the requirements of an air conditioning system, and the constant-frequency compressor is started or stopped frequently, so that the system output fluctuates frequently, and the service life of the compressor and the comfort of customers are seriously influenced.
Disclosure of Invention
The present invention provides a control method, a control system and an air conditioner, which are used for at least partially solving the technical problems.
In order to solve the above problems, an aspect of the present invention provides a control method for controlling an on state of a constant frequency compressor of an air conditioner, including: acquiring the actual high-pressure of the air conditioner at the current moment; judging whether the actual high-pressure is larger than the target load shedding high-pressure of the air conditioner or not, and if so, closing the fixed-frequency compressor; when the fixed-frequency compressor is started again, recording the first time required for the actual high-pressure to reach the target load shedding high-pressure again; and judging whether the first time exceeds a preset value, if not, adjusting the target loading high-pressure of the air conditioner, and keeping the actual high-pressure at a second time between the adjusted target loading high-pressure and the target unloading high-pressure to exceed the preset value.
Therefore, the target loading high-pressure of the air conditioning system is corrected, and compared with the condition before correction, the pressure of the air conditioning system can reach the target loading high-pressure in advance, so that the time that the fixed-frequency compressor is in a starting state is prolonged, frequent starting and stopping of the fixed-frequency compressor are avoided, the service life of the fixed-frequency compressor is prolonged, and the comfort of a user is improved.
Optionally. The adjusting the target loading high pressure of the air conditioner so that the actual high pressure is maintained at the second time between the adjusted target loading high pressure and the target unloading high pressure to exceed the preset value comprises: monitoring an actual high pressure of the air conditioner; when the actual high-pressure reaches the adjusted target loading high-pressure, recording a second time when the actual high-pressure is kept between the adjusted target loading high-pressure and the target unloading high-pressure; and judging whether the second time exceeds the preset value, if not, continuing to adjust the target loading high-pressure of the air conditioner, repeating the step of monitoring the actual high-pressure of the air conditioner, and judging and adjusting until the second time exceeds the preset value.
Optionally, the adjusting the target loading high-pressure of the air conditioner includes: by Pd1′＝Pd1-P0Adjusting target loading high pressure of the air conditioner by N, wherein Pd1Loading the target with high pressure, Pd1' Loading the adjusted target with high pressure, P0The high-voltage correction value is N, and the adjustment times are N.
Optionally, the high pressure correction value is in the range of 0 < P0≤0.15Mpa。
Therefore, the target loading high-pressure of the air conditioner is adjusted in a multi-time fine adjustment mode, the situation that the current output of the fixed-frequency compressor cannot meet the requirement of an air conditioning system due to the fact that the single adjustment amplitude is too large can be prevented, and the comfort degree of use of a user is influenced.
Optionally, the method further comprises: and after the step of closing the fixed-frequency compressor, monitoring the actual high-pressure of the air conditioner, and if the actual high-pressure at a moment is less than the high-pressure value set by the air conditioner demand, opening the fixed-frequency compressor.
Optionally, the method further comprises: and when the second time exceeds the preset value, clearing the high-pressure correction value.
Optionally, before the obtaining the actual high pressure of the air conditioner at the current moment, the method further includes: and judging the working state of the air conditioner, and confirming the normal operation of the air conditioner and the opening of the constant-frequency compressor.
Optionally, the high-voltage correction value is cleared when the shutdown time or the continuous operation time of the air conditioner exceeds a preset time.
In another aspect of the present invention, there is provided a control system for controlling an on state of a fixed frequency compressor of an air conditioner, the system including: the acquisition module is used for acquiring the actual high-pressure of the air conditioner at the current moment; the first judgment module is used for judging whether the actual high-pressure is larger than the target load shedding high-pressure of the air conditioner; the execution module is used for closing the fixed-frequency compressor and starting the fixed-frequency compressor again according to the system requirement under the condition that the actual high-pressure is larger than the target load shedding high-pressure of the air conditioner; the recording module is used for recording the first time required for the actual high-pressure to reach the target load shedding high-pressure again when the fixed-frequency compressor is started again; the second judgment module is used for judging whether the first time exceeds a preset value; and the adjusting module is used for adjusting the target loading high-pressure of the air conditioner under the condition that the first time is less than a preset value, so that the actual high-pressure is kept at a second time between the adjusted target loading high-pressure and the target unloading high-pressure to exceed the preset value.
The control system has the same advantages as the control method, and the description is omitted.
Yet another aspect of the present invention provides an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read by the processor and when executed, implementing the method as described above.
The advantages of the air conditioner are the same as those of the control method, and the description is omitted.
Drawings
FIG. 1 is a flow chart that schematically illustrates a control method provided by an embodiment of the present invention;
FIG. 2 is a flow chart schematically illustrating a method for adjusting a target loading high pressure provided by an embodiment of the present invention;
FIG. 3 schematically illustrates a block diagram of a control system provided by an embodiment of the present invention;
FIG. 4 is a block diagram that schematically illustrates an adjustment module in the control system, provided by an embodiment of the present invention;
fig. 5 schematically shows a block diagram of an air conditioner provided by an embodiment of the present invention.
Detailed Description
In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Example one
Referring to fig. 1, fig. 1 schematically illustrates a flowchart of a control method provided in this embodiment, where the method may be used to control an on state of an air-conditioning fixed-frequency compressor, and the method may include operations S101 to S106, which are specifically as follows:
and S101, acquiring the actual high-pressure of the air conditioner at the current moment.
In operation S101, the air conditioner host and the indoor unit communicate with each other to determine a current operating state of the entire air conditioning system, and if the air conditioning unit is in a normal operating state and the fixed-frequency compressor is in an on state, an actual high pressure of the air conditioner at the current time is obtained. In one possible embodiment, for example, the pressure sensor may be used to monitor the actual high pressure of the air conditioner in real time.
S102, determining whether the actual high pressure is greater than the target load shedding high pressure of the air conditioner, if so, performing operation S103.
For an air conditioner, a target loading high-pressure and a target unloading high-pressure are generally preset, wherein the target loading high-pressure is smaller than the target unloading high-pressure. If the actual high-pressure of the air conditioner at a certain moment is monitored to be larger than the target load shedding high-pressure, the fact that the high-pressure of the air conditioner is too high at the moment is indicated, and the constant-frequency compressor needs to be closed to shed the load shedding high-pressure. If not, the high pressure is normal.
And S103, closing the fixed-frequency compressor.
And S104, when the fixed-frequency compressor is started again, recording the first time required for the actual high-pressure to reach the target load shedding high-pressure again.
When the fixed-frequency compressor is closed, the actual pressure of the air conditioner is reduced, and if the actual high-pressure of the air conditioner is monitored not to exceed the target load shedding high-pressure, the high pressure is normal. And if the actual high-pressure is reduced to be smaller than the high-pressure value set by the normal requirement of the air conditioner, starting the fixed-frequency compressor.
When the compressor is started, the first time required for the actual high pressure to reach the target unloading high pressure from the target loading high pressure is recorded.
And S105, judging whether the first time exceeds a preset value, and if not, executing operation S106.
If the first time is larger than the preset value, it indicates that no operation is needed to be executed so as to adjust the target loading high-pressure.
And S106, adjusting the target loading high-pressure of the air conditioner, so that the actual high-pressure is kept at the second time between the adjusted target loading high-pressure and the target unloading high-pressure to exceed a preset value.
The air conditioner is allowed to be started when reaching the target loading high-pressure compressor, and is closed when reaching the target unloading high-pressure compressor, so that the first time is the starting time of the fixed-frequency compressor, and the longer the time is, the fewer the times of switching the compressor are. If the first time is less than the preset value, the range between the target loading high-pressure and the target unloading high-pressure is too narrow, and at the moment, the time that the fixed-frequency compressor is in a starting state needs to be prolonged, so that the fixed-frequency compressor runs for a long enough time and then stops.
In the embodiment, the target loading high-pressure of the air conditioner is adjusted, specifically, the target loading high-pressure is adjusted to be low, so that the compressor reaches the target loading high-pressure in advance next time, the second time when the actual high-pressure is kept between the adjusted target loading high-pressure and the target unloading high-pressure exceeds the preset value, and the time of the subject starting state of the fixed-frequency compressor is further prolonged. The preset value may be set according to an actual situation, for example, may be 30min, 45min, 1h, and the invention is not limited specifically.
Here, S101 to S106 will be described as a specific example. Setting target loading high pressure Pd of air conditioner13.4MPa, and the target relief high-pressure Pd2 is 3.85 MPa. If the actual high pressure Pd monitored at this time is 3.9MPa, the high pressure is over high, and the fixed-frequency compressor needs to be closed. The actual high pressure Pd is monitored to be 3.3Mpa or 3.5Mpa, namely Pd is less than or equal to Pd1Or Pd1Pd is less than or equal to Pd2, indicating that the high pressure is normal.
When the fixed-frequency compressor is closed, the actual high-pressure is reduced, and if the actual high-pressure is monitored to be 3.3MPa, the high-pressure is normal. When high pressure does not satisfy the air conditioning system demand, the fixed frequency compressor can be opened again, if the fixed frequency compressor opens after 5min, actual high pressure has surpassed Pd2 again: 3.85MPa, which means that the fixed-frequency compressor is started too short time and is frequently started, and Pd is reduced1: 3.4Mpa, so as to prolong the time for opening the fixed-frequency compressor, if the time reaches a preset value, such as 30min, the starting times of the fixed-frequency compressor can be greatly reduced.
In this embodiment, through revising air conditioning system's target loading high pressure, compare before not revising, air conditioning system's pressure can reach target loading high pressure in advance, and then prolongs the time that the fixed frequency compressor is in the starting condition, avoids frequently opening of fixed frequency compressor and stops, improves the life of fixed frequency compressor and the travelling comfort that the customer used.
Example two
Referring to fig. 2, fig. 2 schematically illustrates a flowchart of a method for adjusting a target loading high pressure according to the present embodiment, and as shown in fig. 2, the method may include operations S201 to S205, for example.
S201, adjusting the target loading high-pressure.
In one possible embodiment, Pd is used1′＝Pd1-P0Adjusting target loading high pressure of air conditioner by N, wherein Pd1Loading the target with high pressure, Pd1' Loading the adjusted target with high pressure, P0The high-voltage correction value is N, and the adjustment times are N.
The high-pressure correction value can be in the range 0 < P0The specific correction value is not more than 0.15Mpa, and the invention is not limited by the size of the correction value.
And S202, monitoring the actual high-pressure of the air conditioner.
In one possible embodiment, for example, the pressure sensor may be used to monitor the actual high pressure of the air conditioner in real time.
And S203, recording a second time when the actual high-pressure reaches the adjusted target loading high-pressure, wherein the actual high-pressure is kept between the adjusted target loading high-pressure and the target unloading high-pressure.
After one target load high pressure adjustment, the second time is extended compared to the first time. For example, after S201, the target loading high pressure value is changed from 3.4Mpa to 3.3Mpa, and if the actual pressure value is detected to be 3.4Mpa, the constant frequency compressor is allowed to be started, and the time for increasing the actual pressure value from 3.3Mpa to 3.85Mpa is obviously longer than the time for increasing the actual pressure value from 3.4Mpa to 3.85Mpa, which also indicates that the time for starting the constant frequency compressor is prolonged.
And S204, judging whether the second time exceeds a preset value.
If not, the operations S201 to S204 are repeatedly executed, and the fine adjustment is repeatedly performed for a plurality of times until the time for starting the compressor reaches the time set in the practical application.
If yes, operation S205 is executed to terminate the adjustment.
S205, the correction function is cleared.
And when the second time exceeds a preset value (namely the time set in practical application), clearing the high-voltage correction value and clearing the correction function. And when the shutdown time or the continuous operation time of the air conditioner exceeds the preset time, clearing the high-voltage correction value and clearing the correction function.
In this embodiment, the target loading high-pressure of the air conditioner is adjusted by adopting a repeated fine adjustment mode for many times, so that the condition that the current output of the fixed-frequency compressor cannot meet the requirement of an air conditioning system due to the fact that the single adjustment amplitude is too large can be prevented, and the comfort level of use of a user is influenced.
EXAMPLE III
Referring to fig. 3, fig. 3 schematically illustrates a block diagram of the control system provided in the present embodiment, as shown in fig. 3, the control system 300 may include, for example, an obtaining module 310, a first determining module 320, an executing module 330, a recording module 340, a second determining module 350, and an adjusting module 360.
The obtaining module 310 is configured to obtain an actual high pressure of the air conditioner at the current time.
The first determining module 320 is configured to determine whether the actual high pressure is greater than a target load shedding high pressure of the air conditioner.
And the execution module 330 is configured to close the fixed-frequency compressor and re-open the fixed-frequency compressor according to the system requirement under the condition that the actual high-pressure is greater than the target load shedding high-pressure of the air conditioner.
And the recording module 340 is used for recording the first time required for the actual high-pressure to reach the target unloading high-pressure again when the fixed-frequency compressor is started again.
A second determining module 350, configured to determine whether the first time exceeds a preset value.
And an adjusting module 360, configured to adjust the target loading high-pressure of the air conditioner when the first time is less than the preset value, so that the actual high-pressure is maintained at a second time between the adjusted target loading high-pressure and the target unloading high-pressure, which exceeds the preset value.
In a feasible manner of this embodiment, as shown in fig. 4, fig. 4 schematically illustrates a block diagram of an adjusting module 360 provided in the embodiment, and the adjusting module 360 may include, for example, an adjusting unit 361, a monitoring unit 362, a recording unit 363, a judging unit 364, and a clearing unit 365.
And an adjusting unit 361 for adjusting the target loading high-pressure.
And a monitoring unit 362 for monitoring the actual high pressure of the air conditioner.
And the recording unit 363 is used for recording a second time when the actual high-pressure reaches the adjusted target loading high-pressure, wherein the actual high-pressure is kept between the adjusted target loading high-pressure and the target unloading high-pressure.
The determining unit 364 is configured to determine whether the second time exceeds a preset value.
A zero unit 365 for zero-clearing the correction function
For some embodiments of the system, please refer to the above method embodiments for details, which have the same advantages as the above control method, and are not repeated herein.
Referring to fig. 5, fig. 5 schematically shows a block diagram of an air conditioner provided in the present embodiment. The air conditioner 500 may include, for example, a processor 510 and a computer readable storage medium 520 storing a computer program 521.
In particular, processor 510 may include, for example, a general purpose microprocessor, an instruction set processor and/or related chip set and/or a special purpose microprocessor (e.g., an Application Specific Integrated Circuit (ASIC)), and/or the like. The processor 510 may also include on-board memory for caching purposes. Processor 510 may be a single processing unit or a plurality of processing units for performing different actions of a method flow according to embodiments of the disclosure.
Computer-readable storage media 520, for example, may be non-volatile computer-readable storage media, specific examples including, but not limited to: magnetic storage systems, such as magnetic tape or Hard Disk Drives (HDDs); optical storage systems, such as compact discs (CD-ROMs); memory such as Random Access Memory (RAM) or flash memory, etc.
The computer-readable storage medium 520 may include a computer program 521, which computer program 521 may include code/computer-executable instructions that, when executed by the processor 510, cause the processor 510 to perform a method according to an embodiment of the disclosure, or any variation thereof.
The computer program 521 may be configured with, for example, computer program code comprising computer program modules. For example, in an example embodiment, code in computer program 521 may include one or more program modules, including for example, modules 521A, 521B, … …. It should be noted that the division and number of modules are not fixed, and those skilled in the art may use suitable program modules or program module combinations according to actual situations, and when these program modules are executed by the processor 510, the processor 510 may execute the method according to the embodiment of the present disclosure or any variation thereof.
At least one of the obtaining module 310, the first judging module 320, the executing module 330, the recording module 340, the second judging module 350 and the adjusting module 360 according to the embodiment of the present disclosure may be implemented as a computer program module described with reference to fig. 5, which, when being executed by the processor 510, may implement the corresponding operations described above.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A control method is used for controlling the opening state of a fixed frequency compressor of an air conditioner, and is characterized by comprising the following steps:
acquiring the actual high-pressure of the air conditioner at the current moment;
judging whether the actual high-pressure is larger than the target load shedding high-pressure of the air conditioner or not, and if so, closing the fixed-frequency compressor;
when the fixed-frequency compressor is started again, recording the first time required for the actual high-pressure to reach the target load shedding high-pressure again;
and judging whether the first time exceeds a preset value, if not, adjusting the target loading high-pressure of the air conditioner, and keeping the actual high-pressure at a second time between the adjusted target loading high-pressure and the target unloading high-pressure to exceed the preset value.
2. The control method according to claim 1, wherein the adjusting the target loading high pressure of the air conditioner such that the actual high pressure is maintained at the second time between the adjusted target loading high pressure and the target unloading high pressure exceeding the preset value comprises:
monitoring an actual high pressure of the air conditioner;
when the actual high-pressure reaches the adjusted target loading high-pressure, recording a second time when the actual high-pressure is kept between the adjusted target loading high-pressure and the target unloading high-pressure;
and judging whether the second time exceeds the preset value, if not, continuing to adjust the target loading high-pressure of the air conditioner, repeating the step of monitoring the actual high-pressure of the air conditioner, and judging and adjusting until the second time exceeds the preset value.
3. The control method according to claim 1 or 2, wherein the adjusting the target loading high-pressure of the air conditioner includes:
by Pd1′＝Pd1-P0Adjusting target loading high pressure of the air conditioner by N, wherein Pd1Loading the target with high pressure, Pd1' Loading the adjusted target with high pressure, P0The high-voltage correction value is N, and the adjustment times are N.
4. The control method according to claim 1, characterized in that the method further comprises: and after the step of closing the fixed-frequency compressor, monitoring the actual high-pressure of the air conditioner, and if the actual high-pressure at a moment is less than the high-pressure value set by the air conditioner demand, opening the fixed-frequency compressor.
5. The control method according to claim 3, characterized in that the method further comprises:
and when the second time exceeds the preset value, clearing the high-pressure correction value.
6. The control method according to claim 1, wherein the obtaining of the actual high pressure of the air conditioner at the present time further comprises:
and judging the working state of the air conditioner, and confirming the normal operation of the air conditioner and the opening of the constant-frequency compressor.
7. The control method according to claim 3, wherein the high-voltage correction value is cleared when the air conditioner off time or the continuous operation time exceeds a preset time.
8. Control method according to claim 3, characterized in that the high pressure correction value ranges from 0 < P0≤0.15Mpa。
9. A control system for controlling the on-state of a fixed frequency compressor of an air conditioner, comprising:
the acquisition module is used for acquiring the actual high-pressure of the air conditioner at the current moment;
the first judgment module is used for judging whether the actual high-pressure is larger than the target load shedding high-pressure of the air conditioner;
the execution module is used for closing the fixed-frequency compressor and starting the fixed-frequency compressor again according to the air conditioner requirement under the condition that the actual high-pressure is larger than the target load shedding high-pressure of the air conditioner;
the recording module is used for recording the first time required for the actual high-pressure to reach the target load shedding high-pressure again when the fixed-frequency compressor is started again;
the second judgment module is used for judging whether the first time exceeds a preset value;
and the adjusting module is used for adjusting the target loading high-pressure of the air conditioner under the condition that the first time is less than a preset value, so that the actual high-pressure is kept at a second time between the adjusted target loading high-pressure and the target unloading high-pressure to exceed the preset value.
10. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method according to any one of claims 1 to 8.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115540276A (en) * | 2022-10-17 | 2022-12-30 | 中创美纵信息科技(重庆)有限公司 | Control method and device for fan of air conditioning unit and air conditioning equipment |
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| CN105156313A (en) * | 2011-12-02 | 2015-12-16 | 株式会社日立产机系统 | Air compressor |
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Cited By (1)
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| CN115540276A (en) * | 2022-10-17 | 2022-12-30 | 中创美纵信息科技(重庆)有限公司 | Control method and device for fan of air conditioning unit and air conditioning equipment |
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