CN115451622B - Method and device for fault detection, drying system and storage medium - Google Patents
Method and device for fault detection, drying system and storage medium Download PDFInfo
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- CN115451622B CN115451622B CN202211012983.1A CN202211012983A CN115451622B CN 115451622 B CN115451622 B CN 115451622B CN 202211012983 A CN202211012983 A CN 202211012983A CN 115451622 B CN115451622 B CN 115451622B
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 238000001035 drying Methods 0.000 title claims abstract description 30
- 238000001704 evaporation Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 9
- 230000003111 delayed effect Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007602 hot air drying Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- F25B49/022—Compressor control arrangements
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
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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
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The application relates to the technical field of heat pump drying, and discloses a method for fault detection, which comprises the following steps: acquiring the temperature of a condensing coil; acquiring the temperature of the evaporating coil under the condition that the temperature of the condensing coil is larger than a first temperature threshold; the operating state of the compressor is controlled according to the condensing coil temperature and the evaporating coil temperature. And judging the overload degree of the current compressor through the temperature of the condensing coil. When the condensing coil temperature is greater than the first temperature threshold, the compressor is considered to be severely overloaded. At the same time, the evaporating coil temperature is obtained to further confirm the overload degree of the compressor. Therefore, the coil temperature of the condenser and the coil temperature of the evaporator can be combined, the overload condition of the current compressor can be determined, and the running state of the compressor can be adjusted to reduce the occurrence of overload. The accuracy of compressor overload condition judgment is effectively improved. The application also discloses a device for fault detection, a drying system and a storage medium.
Description
Technical Field
The present application relates to the field of heat pump drying technologies, for example, to a method and apparatus for fault detection, a drying system, and a storage medium.
Background
Currently, the drying machines adopted in the market mainly comprise a hot air drying machine and a dehumidifying heat pump drying machine, wherein the dehumidifying heat pump drying machine is compared with the hot air drying machine, and under the condition that the action space is consistent and the drying objects are the same, the drying time of the dehumidifying heat pump drying machine is shorter and the electricity consumption is lower than half of that of the hot air drying machine.
The control scheme for preventing the overload of the compressor in the heating mode of the heat pump air conditioner system in the related technology is as follows: in the heating mode (comprising starting and running processes), the high-temperature refrigerant saturation temperature is detected through the temperature sensor, and compared with the system overload protection temperature preset by a program after being input into the controller, the system high-pressure refrigerant pressure and the compressor load are in a corresponding relation, so that whether the compressor load is overlarge is judged through the refrigerant pressure corresponding to the high-temperature refrigerant saturation temperature. If the maximum working load of the compressor is reached or exceeded, the operation of the outdoor fan is stopped, the outdoor evaporation temperature and pressure are also reduced rapidly by reducing the refrigerant evaporation rapidly, so that the indoor high-pressure refrigerant temperature and pressure are reduced rapidly to carry out load unloading of the compressor, and then after the compressor load is reduced to a certain degree, the outdoor fan is started to exit protection to enter normal heating. Therefore, the control of the heat pump air conditioner system on the overload prevention of the heat of the compressor ensures that the compressor works in a normal area, and has a vital significance on the long-term reliability of the operation of the compressor.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the practical application process, the temperature change of the high-temperature refrigerant detected by the temperature sensor is delayed from the pressure change of the refrigerant, so that the overload protection of the compressor is delayed by temperature detection when the compressor in a heating state is started and stably operated, and the accuracy of judging the overload condition of the compressor by the system is poor.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for fault detection, a drying system and a storage medium, so as to improve the accuracy of judging the overload condition of a compressor.
In some embodiments, the above method comprises: acquiring the temperature of a condensing coil; acquiring the temperature of the evaporating coil under the condition that the temperature of the condensing coil is larger than a first temperature threshold; the operating state of the compressor is controlled according to the condensing coil temperature and the evaporating coil temperature.
Optionally, controlling the operation state of the compressor according to the condensing coil temperature and the evaporating coil temperature includes: calculating a temperature ratio value of the temperature of the condensing coil to the temperature of the evaporating coil; and controlling the compressor to stop running under the condition that the temperature proportion value is greater than or equal to the proportion threshold value.
Optionally, after the condensing coil temperature is obtained, the method further comprises: controlling the condensing fan to operate in a strong mode under the condition that the temperature of the condensing coil is greater than a second temperature threshold; wherein the second temperature threshold is less than the first temperature threshold.
Optionally, controlling the condensing fan to operate in a power mode includes: and controlling the condensing fan to run continuously at a set wind speed.
Optionally, in the case that the condensing coil temperature is greater than the second temperature threshold, further comprising: acquiring a new condensing coil temperature; and controlling the compressor to perform frequency-reducing operation under the condition that the temperature of the new condensing coil is greater than the first temperature threshold.
Optionally, controlling the compressor to run down, comprising: calculating a temperature difference value between the new condensing coil temperature and a first temperature threshold; and adjusting the operating frequency of the compressor according to the corrected proportion value corresponding to the temperature difference value.
Optionally, before controlling the down-conversion operation of the compressor, the method further comprises: acquiring the running state of a compressor; and stopping the up-conversion operation process under the condition that the compressor is in up-conversion operation.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to perform the above-described method for fault detection when the program instructions are executed.
In some embodiments, the drying system includes: the device for fault detection.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for fault detection described above.
The method and device for fault detection, the drying system and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
and judging the overload degree of the current compressor through the temperature of the condensing coil. When the condensing coil temperature is greater than the first temperature threshold, the compressor is considered to be severely overloaded. At the same time, the evaporating coil temperature is obtained to further confirm the overload degree of the compressor. Therefore, the coil temperature of the condenser and the coil temperature of the evaporator can be combined, the overload condition of the current compressor can be determined, and the running state of the compressor can be adjusted to reduce the occurrence of overload. The accuracy of compressor overload condition judgment is effectively improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic structural view of a drying system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a method for fault detection provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for fault detection provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for fault detection provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for fault detection provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another method for fault detection provided by an embodiment of the present disclosure;
fig. 7 is a schematic diagram of an apparatus for fault detection provided by an embodiment of the present disclosure.
Reference numerals:
10: a compressor; 20: a first indoor heat exchanger; 21: a second indoor heat exchanger; 22: an outdoor heat exchanger; 30: an electronic expansion valve; 40: a first four-way valve; 41: a second four-way valve; 100: a processor; 101: a memory; 102: a communication interface; 103: a bus.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Referring to fig. 1, the drying system includes a compressor 10, a first indoor heat exchanger 20, a second indoor heat exchanger 21, and an outdoor heat exchanger 22. The compressor 10 is disposed between a first end of the first four-way valve 40 and a third end of the second four-way valve 41, and is used for adjusting a flow rate of a refrigerant in the system. The first indoor heat exchanger 20 is disposed between the fourth end of the first four-way valve 40 and the first end of the second four-way valve 41, and is used for adjusting the temperature value in the drying room. The second end of the first four-way valve 40 is connected between the first end of the second four-way valve 41 and the first indoor heat exchanger 20, and the third end of the first four-way valve 40 is connected between the third end of the second four-way valve 41 and the suction port of the compressor 10. One end of the second indoor heat exchanger 21 is connected to the second end of the second four-way valve 41, and the other end is connected to the electronic expansion valve 30, so as to ensure the stability of the system operation. One end of the outdoor heat exchanger 22 is connected to the second indoor heat exchanger 21 through the electronic expansion valve 30, and the other end is connected to the fourth end of the second four-way valve 41.
The drying system comprises a heating mode, a cooling and dehumidifying mode and a heating and dehumidifying mode. In the case that the drying system operates in the heating mode, the first four-way valve 40 is controlled to be in a power-off state, and the second four-way valve 41 is controlled to be in a power-on state. At this time, the refrigerant flows out of the discharge port of the compressor 10, flows through the first and fourth ends of the first four-way valve 40, the first and second ends of the first and second indoor heat exchangers 20 and 41, the second indoor heat exchanger 21, the electronic expansion valve 30, the outdoor heat exchanger 22, and the fourth and third ends of the second four-way valve 41 in this order, and finally flows into the suction port of the compressor 10. That is, in case that the drying system operates in the heating mode, the first indoor heat exchanger 20 and the second indoor heat exchanger 21 perform the heating operation together, and the maximum heating efficiency is ensured. In the case that the drying system operates in the cooling and dehumidifying mode, the first four-way valve 40 is controlled to be in a power-on state, and the second four-way valve 41 is controlled to be in a power-off state. At this time, the refrigerant flows out of the discharge port of the compressor 10, flows through the first and second ends of the first four-way valve 40, the first and fourth ends of the second four-way valve 41, the outdoor heat exchanger 22, the electronic expansion valve 30, the second indoor heat exchanger 21, and the second and third ends of the second four-way valve 41 in this order, and finally flows into the suction port of the compressor 10. That is, in case that the drying system is operated in the cooling and dehumidifying mode, the first indoor heat exchanger 20 is not operated and the second indoor heat exchanger 21 performs a dehumidifying operation. In the case that the drying system is operated in the warm-up dehumidification mode, the first four-way valve 40 is controlled to be in a power-off state, and the second four-way valve 41 is controlled to be in a power-off state. At this time, the refrigerant flows out of the discharge port of the compressor 10, flows through the first and fourth ends of the first four-way valve 40, the first and fourth ends of the first indoor heat exchanger 20, the second four-way valve 41, the outdoor heat exchanger 22, the electronic expansion valve 30, the second indoor heat exchanger 21, the second and third ends of the second four-way valve 41 in this order, and finally flows into the suction port of the compressor 10. Namely, under the condition that the drying system operates in a heating mode, the first indoor heat exchanger 20 performs heating operation, and the second indoor heat exchanger 21 performs defrosting operation, so that the drying efficiency is effectively improved. In addition, the drying system is also provided with a controller electrically connected with each part.
In connection with the drying system shown in fig. 1, embodiments of the present disclosure provide a method for fault detection. As shown in fig. 2, the method includes:
s01, the controller acquires the temperature of the condensing coil.
S02, when the temperature of the condensing coil is larger than a first temperature threshold value, the controller acquires the temperature of the evaporating coil.
S03, the controller controls the running state of the compressor according to the temperature of the condensing coil and the temperature of the evaporating coil.
By adopting the method for fault detection provided by the embodiment of the disclosure, the overload degree of the current compressor can be judged through the temperature of the condensing coil. When the condensing coil temperature is greater than the first temperature threshold, the compressor is considered to be severely overloaded. At the same time, the evaporating coil temperature is obtained to further confirm the overload degree of the compressor. The overload condition of the current compressor can be determined by combining the coil temperature of the condenser and the coil temperature of the evaporator. The accuracy of compressor overload condition judgment is effectively improved. The condenser is a heat exchanger which performs the function of the condenser in the first indoor heat exchanger, the second indoor heat exchanger and the outdoor heat exchanger. The evaporator is a heat exchanger which performs the function of the evaporator in all the first indoor heat exchanger, the second indoor heat exchanger and the outdoor heat exchanger.
Optionally, the controller controls the operation state of the compressor according to the condensing coil temperature and the evaporating coil temperature, including: the controller calculates a temperature ratio of the condensing coil temperature to the evaporating coil temperature. And under the condition that the temperature proportion value is greater than or equal to the proportion threshold value, the controller controls the compressor to stop running.
In this way, the degree of overload of the compressor can be better judged. The temperature ratio value of the temperature of the condensing coil and the temperature of the evaporating coil is more accurate compared with the single numerical value. In the case where the temperature proportional value is greater than or equal to the proportional threshold value, it is determined that the compressor is severely overloaded, and a shutdown process is necessary. At this time, the compressor is controlled to stop, and corresponding overload fault information is sent to the user. The sending of the corresponding overload fault information to the user may be performed by sending the overload fault information to the user side to perform popup window prompt, text message prompt, audio prompt, or the like, or may be performed by components in the system, so long as the purpose of reminding the user can be achieved, which is not limited herein.
As shown in connection with fig. 3, an embodiment of the present disclosure provides another method for fault detection, comprising:
s01, the controller acquires the temperature of the condensing coil.
And S04, controlling the condensing fan to operate in a strong mode by the controller under the condition that the temperature of the condensing coil is greater than a second temperature threshold.
Wherein the second temperature threshold is less than the first temperature threshold.
By adopting the method for fault detection provided by the embodiment of the disclosure, different processing modes can be determined according to different working conditions of the compressor. In the event that the condensing coil temperature is greater than the second temperature threshold, the compressor is considered to be at risk of overload. At the moment, the fan operation powerful mode corresponding to the condenser is controlled, so that the time for overload of the compressor is delayed as much as possible or the compressor is prevented from being overloaded. Because the second temperature threshold is smaller than the first temperature threshold, the size relation between the temperature of the condensing coil and the second temperature threshold is judged first, and then the size relation between the temperature of the condensing coil and the first temperature threshold is judged.
Optionally, the controller controls the condensing fan to operate in a power mode, including: the controller controls the condensing fan to set the wind speed to run uninterruptedly.
In this way, the compressor overload time can be better delayed or avoided. The set wind speed can be automatically determined by the controller according to the difference between the temperature of the condensing coil and the second temperature threshold value, or can be set in advance by a user according to use experience.
As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for fault detection, comprising:
s01, the controller acquires the temperature of the condensing coil.
And S04, controlling the condensing fan to operate in a strong mode by the controller under the condition that the temperature of the condensing coil is greater than a second temperature threshold.
S05, the controller acquires a new condensing coil temperature.
And S06, controlling the compressor to run in a down-conversion mode by the controller under the condition that the temperature of the new condensing coil is greater than the first temperature threshold.
By adopting the method for fault detection provided by the embodiment of the disclosure, the possibility of overload fault of the compressor can be further determined. The new condensing coil temperature can be obtained through a real-time monitoring mode. The detection and judgment can be performed after the time length is set at intervals, the time length can be the time length set by a user, or the time length corresponding to the time length can be determined according to the temperature of the condensing coil, and the like, and the method is not particularly limited. The new condensing coil temperature during a period of time may also be engaged by collecting several new condensing coil temperatures during that period of time. And judging the actual effect of the operation powerful mode of the condensing fan according to the temperature change curve after engagement. Compared with a direct comparison mode, the method can effectively avoid the problem of repeated conversion control mode caused by partial temperature mutation through a mode of meshing a temperature change curve.
Optionally, the controller controls the compressor to run down, including: the controller calculates a new temperature difference between the condensing coil temperature and the first temperature threshold. The controller adjusts the operating frequency of the compressor according to the corrected ratio value corresponding to the temperature difference value.
In this way, the compressor overload time can be better delayed or avoided. A temperature difference is calculated for the new condensing coil temperature and the first temperature threshold. And determining a correction proportion value through a preset corresponding relation corresponding to the temperature difference value. The product of the correction proportion value and the current operating frequency is set to be the target frequency value of the down-conversion operation, so that the time for generating overload of the compressor can be effectively delayed or the compressor can be prevented from generating overload. In addition, for a system with lower cost, the frequency-reducing operation of the compressor can be realized by adopting a mode of presetting a frequency-reducing value.
As shown in conjunction with fig. 5, an embodiment of the present disclosure provides another method for fault detection, comprising:
s01, the controller acquires the temperature of the condensing coil.
And S04, controlling the condensing fan to operate in a strong mode by the controller under the condition that the temperature of the condensing coil is greater than a second temperature threshold.
S05, the controller acquires a new condensing coil temperature.
S07, when the temperature of the new condensing coil is greater than the first temperature threshold, the controller obtains the running state of the compressor.
S08, under the condition that the compressor is in the frequency-raising operation, stopping the frequency-raising operation process of the compressor.
By adopting the method for fault detection provided by the embodiment of the disclosure, the time for overload of the compressor can be delayed or the overload of the compressor can be avoided. When the condensing coil temperature is detected to be greater than the first temperature threshold, it is determined that the compressor overload is likely to be greater. At this time, if the compressor is in the frequency-increasing operation state, the compressor is controlled to be switched to the frequency-decreasing operation. In the case that the compressor is originally in the down-conversion operation, it is judged whether the operation frequency of the compressor needs to be reduced again.
As shown in connection with fig. 6, an embodiment of the present disclosure provides another method for fault detection, comprising:
s01, the controller acquires the temperature of the condensing coil.
S200, the controller judges whether the temperature of the condensing coil is greater than a second temperature threshold. If yes, go to step S210; if not, return to step S01.
S210, the controller judges whether the temperature of the condensing coil is greater than a first temperature threshold. If yes, go to step S240; if not, step S220 is performed.
S220, a condensing coil fan operates in a strong mode.
S230, the controller acquires the temperature of the condensing coil again.
S231, the controller judges whether the temperature of the condensing coil is greater than a first temperature threshold. If yes, go to step S240; if not, return to step S230.
S240, the compressor is operated in a down-conversion mode.
S250, the controller acquires the temperature of the evaporating coil, and calculates a temperature proportion value of the temperature of the condensing coil and the temperature of the evaporating coil.
S251, the controller judges whether the temperature ratio is smaller than a ratio threshold. If yes, return to step S230; if not, step S260 is performed.
And S260, stopping the operation of the compressor and sending fault information to a user.
By adopting the method for fault detection provided by the embodiment of the disclosure, the overload degree of the current compressor can be judged through the temperature of the condensing coil. When the condensing coil temperature is greater than the second temperature threshold, the compressor is considered to be at risk of overload. At this time, the condensing coil temperature is compared with a first temperature threshold value, and the overload degree of the compressor is further judged. And controlling the compressor to perform frequency-reducing operation when the temperature of the condensing coil is greater than a first temperature threshold. And meanwhile, the temperature of the evaporating coil is obtained, and the temperature proportion value of the temperature of the condensing coil and the temperature of the evaporating coil is calculated so as to carry out further judgment. When the temperature of the condensing coil is smaller than or equal to the first temperature threshold, the fan corresponding to the condenser operates in a strong mode, so that the time for overload of the compressor is delayed as much as possible or the overload of the compressor is avoided. After the fan operates in the power mode, the condensing coil temperature is periodically detected. When the condensing coil temperature is detected to be greater than the first temperature threshold, it is determined that the compressor overload is likely to be greater. At this time, if the compressor is in the frequency-increasing operation state, the compressor is controlled to be switched to the frequency-decreasing operation. And meanwhile, the temperature of the evaporating coil is obtained, and the temperature proportion value of the temperature of the condensing coil and the temperature of the evaporating coil is calculated so as to carry out further judgment. When the temperature ratio is greater than or equal to the ratio threshold, the compressor is judged to be severely overloaded, and shutdown processing is necessary. At this time, the compressor is controlled to stop, and corresponding overload fault information is sent to the user.
Optionally, when the temperature of the condensing coil is detected to be greater than the first temperature threshold, the controller acquires the temperature of the condensing coil again after controlling the down-conversion operation of the compressor for a set period of time. The controller calculates a temperature ratio value of the condensing coil temperature and the evaporating coil temperature, and judges whether the compressor stops running or not according to the temperature ratio value.
In this way, there is less likelihood of a change in condensing coil temperature than would be possible if it were directly determined. The accuracy of judging after the compressor is in the down-conversion operation for a period of time is higher, and the reliability of judging the overload degree of the compressor is improved. The preset time may be determined according to the temperature of the condensing coil, or may be set in advance by a user according to experience, which is not limited herein.
As shown in connection with fig. 7, an embodiment of the present disclosure provides an apparatus for fault detection, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. Processor 100 may invoke logic instructions in memory 101 to perform the method for fault detection of the above-described embodiments.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by running program instructions/modules stored in the memory 101, i.e. implements the method for fault detection in the above-described embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a drying system, which comprises the device for detecting faults.
The disclosed embodiments provide a storage medium storing computer-executable instructions configured to perform the above-described method for fault detection.
The storage medium may be a transitory storage medium or a non-transitory storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (7)
1. A method for fault detection, comprising:
acquiring the temperature of a condensing coil;
acquiring the temperature of the evaporating coil under the condition that the temperature of the condensing coil is larger than a first temperature threshold value;
controlling the running state of the compressor according to the temperature of the condensing coil and the temperature of the evaporating coil;
wherein after the obtaining the condensing coil temperature, further comprises:
controlling a condensing fan to operate in a powerful mode under the condition that the temperature of the condensing coil is greater than a second temperature threshold; acquiring a new condensing coil temperature; controlling the compressor to run in a frequency-reducing mode under the condition that the temperature of the new condensing coil is larger than a first temperature threshold value; wherein the second temperature threshold is less than the first temperature threshold;
the controlling the operation state of the compressor according to the condensing coil temperature and the evaporating coil temperature comprises the following steps:
calculating a temperature ratio of the condensing coil temperature to the evaporating coil temperature; and controlling the compressor to stop running under the condition that the temperature proportion value is greater than or equal to the proportion threshold value.
2. The method of claim 1, wherein controlling the condensing fan operation power mode comprises:
and controlling the condensing fan to run continuously at a set wind speed.
3. The method of claim 1, wherein said controlling the compressor to run down comprises:
calculating a temperature difference between the new condensing coil temperature and the first temperature threshold;
and adjusting the operation frequency of the compressor according to the corrected proportion value corresponding to the temperature difference value.
4. The method of claim 3, further comprising, prior to said controlling the compressor to run down:
acquiring the running state of a compressor;
and stopping the up-conversion operation process under the condition that the compressor is in up-conversion operation.
5. An apparatus for fault detection comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for fault detection of any of claims 1 to 4 when the program instructions are run.
6. A drying system comprising the apparatus for fault detection as claimed in claim 5.
7. A storage medium storing program instructions which, when executed, perform the method for fault detection of any one of claims 1 to 4.
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| CN202211012983.1A CN115451622B (en) | 2022-08-23 | 2022-08-23 | Method and device for fault detection, drying system and storage medium |
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| CN202211012983.1A CN115451622B (en) | 2022-08-23 | 2022-08-23 | Method and device for fault detection, drying system and storage medium |
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