CN111577638B - Fan overload protection control method and device and fan overload protection circuit - Google Patents
Fan overload protection control method and device and fan overload protection circuit Download PDFInfo
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- CN111577638B CN111577638B CN202010331413.3A CN202010331413A CN111577638B CN 111577638 B CN111577638 B CN 111577638B CN 202010331413 A CN202010331413 A CN 202010331413A CN 111577638 B CN111577638 B CN 111577638B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application discloses a fan overload protection control method, a fan overload protection control device and a fan overload protection circuit, wherein the method comprises the following steps: detecting an overload switch of any fan in the unit; when the overload switch is detected to be disconnected, controlling a compressor of the unit to stop running; and under the state of controlling the compressor to stop running, the fan disconnected by the overload switch is controlled to restart for many times, and when the disconnection of the overload switch is detected in each restarting process, the fan disconnected by the overload switch is determined to have a fault. Compared with the prior art, this embodiment is through detecting overload switch in the fan to after detecting overload switch and taking place to close the compressor when transshipping, the state of controlling the compressor to close gets off and restarts the fan many times and carries out overload detection, realizes can detect under the prerequisite of fan trouble when the fan takes place to transship, need not to restart the compressor many times, and then effectively avoids fan and compressor because the fan takes place to transship the damage that causes.
Description
Technical Field
The application relates to the technical field of refrigeration equipment, in particular to a fan overload protection control method and device and a fan overload protection circuit.
Background
The fan and the compressor are components of a heat pump type refrigeration system. In the existing heat pump type refrigerating system, the main control machine controls the starting mode of the fan and the compressor to be synchronous starting or starting successively, for example, when a heat pump type air conditioner heats, the compressor is started first, and the fan is started later. When the fan is subjected to overload protection, the main control computer of the existing refrigeration equipment cannot receive overload protection information, so that the fan can be frequently restarted due to frequent overload protection. And under the influence of a starting mode, the compressor is frequently restarted along with the fan under the condition, and the service lives of the fan and the compressor are further influenced.
Disclosure of Invention
The technical problem that this application embodiment will solve lies in, solves because the fan frequently carries out overload protection and leads to the compressor to frequently open to influence fan and compressor life's problem.
In order to solve the above problem, an embodiment of the present application provides a fan overload protection control method, which is suitable for being executed in a computing device, and at least includes the following steps:
detecting an overload switch of any fan in the unit;
when the overload switch is detected to be disconnected, controlling a compressor of the unit to stop running;
and under the state of controlling the compressor to stop running, controlling the fan with the disconnected overload switch to restart for multiple times, and determining that the fan with the disconnected overload switch breaks down when the disconnection of the overload switch is detected in each restarting process.
Further, after controlling the compressor of the unit to stop operating, the method further comprises:
and when the compressor stopping time is detected to reach the preset time, closing each fan in the unit.
Further, after detecting that the overload switch is turned off, the method further includes:
first fault information indicating that the overload switch is in an open state is generated and stored.
Further, the repeatedly controlling the fan with the overload switch disconnected to restart, and determining that the fan with the overload switch disconnected has a fault when the overload switch disconnected is detected in each restarting process includes:
controlling the fan disconnected by the overload switch to restart for multiple times, and detecting the working state of the overload switch when restarting every time; when detecting that the overload switch is normal in any restart, controlling the fan disconnected by the overload switch to stop restarting and controlling each fan and the compressor in the unit to operate, otherwise, when detecting that the restart times of the fans reach the preset times, controlling the fan disconnected by the overload switch to stop operating and determining that the fan disconnected by the overload switch fails.
Further, the method for detecting the normal state of the overload switch comprises the following steps:
and judging that the overload switch is normal when the closing duration of the overload switch is detected to exceed the preset duration in any restart.
Further, after it is determined that the fan with the overload switch disconnected fails, the method further includes:
and generating and storing second fault information for indicating that the overload fault occurs to the fan with the overload switch disconnected.
Further, the method also comprises the following steps: and when the second fault information is detected to be removed, controlling the operation of each fan and the compressor in the unit.
Further, still provide a fan overload protection controlling means, include:
the detection module is used for detecting an overload switch of a fan in the unit;
the first control module is used for controlling the compressor of the unit to stop running when the overload switch is detected to be disconnected;
and the second control module is used for controlling the fan to restart for multiple times under the condition of controlling the compressor to stop running, and determining that the fan breaks down when the overload switch is detected to be disconnected in each restarting process.
Further, a controller is provided, which includes a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to execute the steps of the fan overload protection control method in the foregoing embodiment.
Further, a fan overload protection circuit is provided, which comprises a wire holder, a fan with an overload switch, a compressor and the controller in the embodiment;
the wire holder comprises a plurality of I/O ports;
the overload switch is connected with the input end of the I/O port; wherein the I/O port accessed by the overload switch is not connected in series with the rest I/O ports in the wire holder;
the output end of each group of the I/O interface is connected to the controller, and the controller is connected with the fan and the compressor.
Compared with the prior art, this embodiment is through detecting overload switch in the fan to after detecting overload switch and taking place to close the compressor when transshipping, the state of controlling the compressor to close gets off and restarts the fan many times and carries out overload detection, realizes can detect under the prerequisite of fan trouble when the fan takes place to transship, need not to restart the compressor many times, and then effectively avoids fan and compressor because the fan takes place to transship the damage that causes.
Drawings
Fig. 1 is a schematic structural diagram of a fan overload protection control method according to an embodiment;
fig. 2 is a schematic flow chart of a fan overload protection control method according to an embodiment;
fig. 3 is a schematic structural diagram of a fan overload protection control device according to yet another embodiment;
FIG. 4 is a schematic diagram of a controller according to an embodiment;
FIG. 5 is a block diagram of a fan overload protection circuit according to an exemplary embodiment;
FIG. 6 is a prior art partial circuit structure diagram of a fan overload protection circuit;
fig. 7 is a partial circuit structure diagram of a fan overload protection circuit according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
The existing fan overload protection system has the advantages that the existing main control machine cannot receive overload protection information, so that the fan can be frequently subjected to overload protection, and frequent restarting is caused. And because the starting mode of the fan and the compressor is synchronous starting or sequential starting, when the fan frequently carries out overload protection, the compressor can be frequently restarted. Although there is a method of protecting the compressor by turning off the compressor when the compressor is overloaded in the prior art, the method cannot stop the operation of the compressor when the fan is overloaded since the compressor is not overloaded at this time. The frequent starting of the compressor can lead the compressor to continuously pump the refrigeration oil in the compressor into the pipeline in the frequent starting and stopping process, and the refrigeration oil in the pipeline can not effectively flow back into the compressor, so that the compressor is easy to run due to oil shortage, the compressor is burnt out, and the service life of the compressor is influenced.
To solve the above problem, as shown in fig. 1, the method is an architectural schematic diagram of a fan overload protection control method according to an embodiment, and includes: a controller 1, a fan 2 and a compressor 3. The controller 1 is connected with a fan 2 and a compressor 3. The connection may be an electrical connection or a wireless connection. It is understood that the controller 1 may be used to separately execute the fan overload protection control method provided in the embodiment of the present application. Specifically, in one embodiment, the controller 1 detects an overload switch of any one of the fans 2 in the unit. Wherein, fan 2 in the unit can be one, also can be a plurality of fan 2, and every fan 2 all has an overload switch. When the controller 1 detects that the overload switch of any fan 2 in the unit is disconnected, the compressor 3 of the unit is controlled to stop running, such as the power supply of the compressor 3 is cut off. Meanwhile, after detecting that the compressor 3 keeps a state of stopping running, the controller 1 controls the fan 2 with the overload switch disconnected for a plurality of times to restart, and determines that the fan 2 breaks down when detecting that the overload switch of the fan 2 is disconnected in each restarting process. Through detecting overload switch in the fan to after detecting overload switch and taking place to close the compressor when transshipping, the state of closing at the control compressor gets off to restart the fan many times and carries out overload detection, realizes can detecting under the prerequisite of fan trouble when the fan takes place to transship, need not to restart the compressor many times, and then effectively avoids fan and compressor because the fan takes place to transship the damage that causes.
In one embodiment, a fan overload protection control method is provided. The embodiment is exemplified by the method being executed by a computer device, wherein the computer device may specifically be the controller 1 in fig. 1. As shown in fig. 2, the fan overload protection control method includes:
and step S11, detecting an overload switch of any fan in the unit.
In one embodiment, when an equipment operation instruction is received, a fan in a unit is started, and the starting time of the fan is detected. When the time for detecting the opening of the fan exceeds a first threshold value, the closing condition of an overload switch of the fan in the unit is detected. The unit is an integral unit, can be a unit with a single fan, and can also be a unit with a combination of multiple fans. The device operation instruction may be generated by a terminal, such as a remote controller, a mobile phone, or other remote control device, through a wireless transmission mode, or may be generated by a control key on the refrigeration system. The overload switch may be a common overload protection device such as a fuse or the like.
Because the current that needs the start is started to general fan, the fan that just starts receives the acting of external force current and begins to rotate the start, needs a period of time after the start just can stabilize, keeps balanced wind speed. Therefore, if the overload switch is directly detected when the fan is started, the overload protection is easily triggered under the condition that the fan is not stable, and the misjudgment is caused. For solving this problem, this embodiment is detecting that the fan is opened when long exceeding first threshold value for the fan is stable the back, just carries out overload switch's detection, avoids the erroneous judgement. Wherein the first threshold may be 50 s.
And step S12, when the overload switch is detected to be disconnected, controlling the compressor of the unit to stop running.
In one embodiment, when the air conditioner is started, the fan in the air conditioner set is controlled to be started for at least 1min in advance, and if the fan is detected to be overloaded before the compressor is started, the compressor is not started. And under the state that the compressor is normally controlled to be started, if the fact that the duration of disconnection of the overload switch reaches a second threshold value is detected, judging that the fan is subjected to overload protection, and controlling the compressor to stop running at the moment. In the detection process, the situation that whether the overload switch is actually in the off state or not can not be accurately judged due to signal fluctuation and other reasons, so that the judgment is carried out in a process quantity detection mode instead of a mode of detecting instantaneous quantity, and the detection result can be more accurate. In order to avoid that the process amount is too long to affect the subsequent control, the second threshold value is not too long, and optionally, the second threshold value may be set to 2 s.
In one embodiment, after the compressor of the unit is controlled to stop running, when the time for stopping running of the compressor is detected to reach the preset time, each fan in the unit is turned off. When the equipment is used for heating, the fins are used as evaporation sides, if the compressor is suddenly closed at the moment, a large amount of refrigerant rushes to the fins in the process that the refrigerant on the pipeline still flows dynamically to form liquid accumulation, and when the equipment is used for refrigerating, the fins are used as condensation sides, and if the compressor is suddenly closed at the moment, a large amount of heat sources can be generated to influence the performance of the unit. Therefore, the delayed closing of the fan is controlled, so that the evaporation effect of the fins can be prolonged when the equipment is heated, the phenomenon that liquid returns seriously when the next press is started is avoided, a large number of heat sources can be taken away in time during refrigeration, and the performance is improved. Optionally, the preset time period may be 2 min. It should be noted that, when the unit is a multi-fan combined unit, the overload switch of one of the fans is detected to be turned off, and the other fans are controlled to be turned off in a delayed manner.
In one embodiment, when the overload switch is detected to be disconnected, first fault information used for indicating that the overload switch is in a disconnected state and the unit enters a protection state is generated, and the first fault information is stored for fault troubleshooting in the following process.
And step S13, controlling the fan with the overload switch disconnected for a plurality of times to restart under the state that the compressor is controlled to stop running, and determining that the fan with the overload switch disconnected breaks down when the overload switch disconnected is detected in each restarting process.
In one embodiment, the fan which controls the overload switch to be disconnected is restarted for multiple times, and the working state of the overload switch is detected at each restart. When detecting that the overload switch is normal in any restart, controlling each fan and each compressor in the unit to operate, otherwise, when detecting that the restart times of the fans reach the preset times, controlling the fans disconnected by the overload switch to stop operating, and determining that the fans disconnected by the overload switch have faults. In one embodiment, when the overload switch is detected to be closed in any restart, the overload switch is judged to be normal, and the first fault information is removed. As an improvement of the above embodiment, when it is detected that the closing time period of the overload switch exceeds the preset time period in any restart, it is determined that the overload switch is normal, and the first failure information is removed. The duration interval of each restart may be 5 min. As an example of the embodiment, within 30min, if it is detected that the overload switch is closed for more than 5s at a certain restart, the overload switch is determined to be normal, and at this time, the fan and the compressor are controlled to operate according to the currently selected mode. It can be understood that, in order to operate the selected mode, it is inevitable to control whether the fan corresponding to the overload switch is turned off first and then operated according to the selected mode, for example, in the heating or cooling mode of the heat pump type refrigeration system, the fan corresponding to the overload switch is controlled to be turned off first and then operated first, so that cooling or heating can be completed, which is determined by the operating mode of the refrigeration system. If the unit is a multi-fan combined unit, after the fan corresponding to the overload switch is closed, the operation of each fan and the compressor is controlled according to the currently selected mode. And if the fan which is disconnected by the overload switch is detected to be restarted for 3 times continuously and the overload switch is still in the disconnected state when the fan is restarted every time, controlling the fan which is disconnected by the overload switch to stop running and determining that the fan breaks down. As the improvement of the embodiment, after the fan is restarted each time, the closing condition of the overload switch of the fan in the unit is detected when the time for detecting the opening of the fan exceeds the first threshold value, so that the detection accuracy is ensured. Secondly, if the unit is a multi-fan combined unit, only the fan with the overload switch disconnected is controlled to be restarted in the restarting process, and other fans are in a closed state.
In one embodiment, after the fan with the disconnected overload switch is determined to have a fault, second fault information used for indicating that the fan with the disconnected overload switch has the overload fault is generated and stored, so that fault troubleshooting can be carried out subsequently. After the first fault information and the second fault information are generated, the unit is not started again until the equipment operation instruction is received again, and whether the second fault information is removed or not is detected; and if the second fault information is removed, indicating that the fault is removed, controlling each fan and each compressor in the unit to operate according to the selected operation mode, and continuously detecting the fan overload switch. The removing method of the second fault information may include: 1. and when the overload switch of the fan corresponding to the second fault information is detected to be closed, the second fault information is removed. 2. And when an equipment operation instruction is received, starting the fan corresponding to the second fault information, and removing the second fault information when detecting that the closing time of an overload switch of the fan exceeds a preset time length. As an improvement of the above embodiment, for better overload protection, when it is detected that both the first fault information and the second fault information are removed, the fan and the compressor in the unit are started according to the selected operation mode. The removing method of the first fault information and the second fault information may include: 1. and when the overload switch of the fan is detected to be closed, the second fault information is removed, the fan is started, the overload switch is continuously detected, and the first fault information is removed when the overload switch is detected to be closed for more than a preset time. 2. And when an equipment operation instruction is received, starting the fan corresponding to the second fault information, and removing the first fault information and the second fault information when detecting that the overload switch of the fan is closed for more than a preset time.
In yet another embodiment, a fan overload protection control device is provided. As shown in fig. 3, includes:
and the detection module 101 is used for detecting an overload switch of a fan in the unit.
And the first control module 102 is used for controlling the compressor of the unit to stop running when the overload switch is detected to be disconnected.
In an embodiment, the first control module 102 is further configured to turn off each fan in the unit when the compressor stop operation duration is detected to reach a preset duration.
In an embodiment, the first control module 102 is further configured to, after detecting that the overload switch is turned off, generate and store first fault information indicating that the overload switch is in an off state and the unit enters a protection state.
And the second control module 103 is used for controlling the fan to restart for multiple times in a state of controlling the compressor to stop running, and determining that the fan breaks down when the overload switch is detected to be disconnected in each restarting process.
In an embodiment, the second control module 103 is further configured to, in a state where the compressor is controlled to stop operating, control the fan that is turned off by the overload switch to restart for multiple times, and detect a working state of the overload switch at each restart; when detecting that the overload switch is normal in any restart, controlling the fan disconnected by the overload switch to stop restarting and controlling each fan and each compressor in the unit to operate, otherwise, when detecting that the restart times of the fans reach the preset times, controlling the fan disconnected by the overload switch to stop operating and determining that the fan disconnected by the overload switch fails. The method for detecting the normal state of the overload switch comprises the following steps: and judging that the overload switch is normal when the closing duration of the overload switch is detected to exceed the preset duration in any restart.
In an embodiment, the second control module 103 is further configured to, after determining that the fan with the overload switch off has an overload fault, generate and store second fault information indicating that the fan with the overload switch off has the overload fault.
In an embodiment, the second control module 103 is further configured to control operation of each of the fans and the compressors in the unit when it is detected that the second failure information is removed. Or when the first fault information and the second fault information are detected to be removed, controlling the operation of each fan and each compressor in the unit.
The fan overload protection control device of the embodiment detects the overload switch in the fan, and closes the compressor when detecting the overload switch and overloading, and restarts the fan for many times to overload and detect the state of the compressor closing, so that the fan can detect fan faults when overloading, and the compressor is not required to be restarted for many times, and further the fan and the compressor are effectively prevented from being damaged due to overload of the fan.
In one embodiment, a schematic diagram of a controller is provided. As shown in fig. 4, the controller includes a processor, a memory, an input/output interface, and a database connected by a system bus. Wherein the processor of the controller is configured to provide computational and control capabilities. The memory of the controller comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the controller is used for connecting with an external database to receive the component data in the database. The controller is executed by the processor to implement the fan overload protection control method described in the above embodiments. Those skilled in the art will appreciate that the configuration shown in fig. 4 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation on the controller to which the present application is applied, and that a particular controller may include more or fewer components than those shown, or combine certain components, or have a different arrangement of components.
In one embodiment, a structural diagram of a fan overload protection circuit is provided. As shown in fig. 5, includes: a wire holder 201, a fan 202 with an overload switch, a compressor 203, and a controller 204 as described in the above embodiments. The wire holder 201 includes a plurality of I/O ports, and the overload switch of the fan 202 is connected to the input terminals of the I/O ports. Wherein, the I/O port connected by the overload switch is not connected in series with the rest I/O ports in the wire holder 201. The output end of each group of I/O interfaces is connected to a controller 204, and the controller 204 is connected with the fan 202 and the compressor 203.
Since the existing heat pump and air conditioner handles fan overload by connecting the fan overload switch and the water flow switch in series, as shown in fig. 6, the FOHP1 and the FOHP2 are the overload switches of the fans, the FS is the water flow switch, and the interfaces 9 and 14 are connected to the controller 204. And if any fan is overloaded, the whole machine is stopped. However, the method is not suitable for complex machine types such as double-air-cavity machine types, triple co-generation machine types and the like, and because the machine halt caused by the water flow switch or the fan overload switch cannot be distinguished, misjudgment is easily caused, and the problem of a unit is inconvenient to investigate and analyze. Therefore, in an embodiment, in the protection circuit, the I/O port connected to the overload switch is not connected in series with the remaining I/O ports in the wire holder, as shown in fig. 7, the ports 7, 8, 9, 10, 11, and 12 are independent of each other, the input end is used for connecting to the FOHP and the FS, and the output end is used for connecting to the controller 204, so that when overload protection occurs, it can be clearly determined whether the water flow switch is overloaded or the fan is overloaded, thereby facilitating subsequent troubleshooting and analysis of the unit problem.
The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.
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 may be implemented by a computer program, which may be stored in a computer readable storage medium and executed by a computer to implement 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.
Claims (8)
1. A fan overload protection control method is characterized by comprising the following steps:
detecting an overload switch of any fan in a unit, wherein when the time for detecting the opening of the fan exceeds a first threshold value, the closing state of the overload switch of the fan in the unit is detected;
when the overload switch is detected to be disconnected, controlling the compressor of the unit to stop running when the duration of the disconnection of the overload switch reaches a second threshold value;
when the unit is a multi-fan combined unit, detecting that an overload switch of one fan is disconnected, and controlling all the other fans to be turned off in a delayed manner;
when the time length of the compressor stopping operation is detected to reach the preset time length, closing all fans in the unit;
under the state that the compressor is controlled to stop running, the fan with the disconnected overload switch is controlled to restart for many times, and when the disconnection of the overload switch is detected in each restarting process, the fan with the disconnected overload switch is determined to have a fault, and the method comprises the following steps:
the method comprises the steps of controlling the fans disconnected by the overload switch to restart for multiple times, detecting the working state of the overload switch when restarting every time, detecting the closing state of the overload switch only when the time for detecting the opening of the fans exceeds a first threshold value after restarting every time, controlling the fans disconnected by the overload switch to restart and other fans to be in the closing state in the restarting process when the unit is a multi-fan combination, controlling the fans and the compressor in the unit to operate when detecting that the overload switch is normal in any restarting, and otherwise, controlling the fans disconnected by the overload switch to stop operating when detecting that the restarting times of the fans reach preset times, and determining that the fans disconnected by the overload switch have faults.
2. The fan overload protection control method according to claim 1, further comprising, after detecting that the overload switch is turned off:
and generating and storing first fault information for indicating that the overload switch is in an off state and the unit enters a protection state.
3. The fan overload protection control method according to claim 1, wherein the method for detecting the normal state of the overload switch comprises the following steps:
and judging that the overload switch is normal when the closing duration of the overload switch is detected to exceed the preset duration in any restart.
4. The fan overload protection control method according to claim 1, further comprising, after determining that the fan with the overload switch off has a fault:
and generating and storing second fault information for indicating that the overload fault occurs to the fan with the overload switch disconnected.
5. The fan overload protection control method according to claim 4, further comprising: and when the second fault information is detected to be removed, controlling the operation of each fan and the compressor in the unit.
6. The utility model provides a fan overload protection controlling means which characterized in that includes:
the detection module is used for detecting an overload switch of a fan in the unit, wherein when the time for detecting the opening of the fan exceeds a first threshold value, the closing state of the overload switch of the fan in the unit is detected;
the first control module is used for controlling the compressor of the unit to stop running when the continuous time for detecting the disconnection of the overload switch reaches a second threshold value when the disconnection of the overload switch is detected;
the second control module is used for controlling the fan to restart for multiple times in a state of controlling the compressor to stop running, and determining that the fan breaks down when the overload switch is detected to be disconnected in each restarting process, and the method comprises the following steps:
the method comprises the steps of controlling the fans disconnected by the overload switch to restart for multiple times, detecting the working state of the overload switch when restarting every time, detecting the closing state of the overload switch only when the time for detecting the opening of the fans exceeds a first threshold value after restarting every time, controlling the fans disconnected by the overload switch to restart and other fans to be in the closing state in the restarting process when the unit is a multi-fan combination, controlling the fans and the compressor in the unit to operate when detecting that the overload switch is normal in any restarting, and otherwise, controlling the fans disconnected by the overload switch to stop operating when detecting that the restarting times of the fans reach preset times, and determining that the fans disconnected by the overload switch have faults.
7. A controller, comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the method according to any one of claims 1 to 5.
8. A fan overload protection circuit comprising a wire holder, a fan with an overload switch, a compressor, and a controller as claimed in claim 7;
the wire holder comprises a plurality of I/O ports;
the overload switch is connected with the input end of the I/O port; wherein the I/O port accessed by the overload switch is not connected in series with the rest I/O ports in the wire holder;
and the output end of each group of I/O ports is connected to the controller, and the controller is connected with the fan and the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112594902B (en) * | 2020-12-03 | 2022-10-28 | 重庆海尔空调器有限公司 | Control method and system of air conditioner |
| CN113446236B (en) * | 2021-07-08 | 2022-11-29 | 上海威派格智慧水务股份有限公司 | Centrifugal pump idle protection method and device and edge gateway |
| CN115159025A (en) * | 2022-07-18 | 2022-10-11 | 天地(榆林)开采工程技术有限公司 | Control method and device of belt conveyor and belt conveyor |
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| KR20060036726A (en) * | 2004-10-26 | 2006-05-02 | 삼성전자주식회사 | Drying apparatus and control method thereof |
| JP4572813B2 (en) * | 2005-11-14 | 2010-11-04 | 株式会社デンソー | Control device |
| CN101089501A (en) * | 2006-06-16 | 2007-12-19 | 乐金电子(天津)电器有限公司 | Air conditioner and its control method |
| CN205160470U (en) * | 2015-11-23 | 2016-04-13 | 顺德中山大学太阳能研究院 | Multi -angle photovoltaic data vasculum |
| CN108565828A (en) * | 2018-05-30 | 2018-09-21 | 珠海格力电器股份有限公司 | Share the circuit of overload protection and the air-conditioner set with the circuit |
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