CN112594864A - Control method for surge judgment and optimization, controller, cross-flow fan and air conditioner - Google Patents
Control method for surge judgment and optimization, controller, cross-flow fan and air conditioner Download PDFInfo
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0025—Cross-flow or tangential fans
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/40—Damper positions, e.g. open or closed
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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
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Abstract
The invention belongs to the technical field of surge judgment optimization, and discloses a control method for surge judgment and optimization, a controller, a cross-flow fan and an air conditioner, wherein detection is made and surge phenomenon judgment is judged according to the principle, characteristics and phenomenon that a cross-flow fan blade generates surge, when the surge is judged, a fault code is output in time to remind a user of cleaning a system in time, the maintenance direction and reasons can be conveniently locked after sale, and the possibility of permanent damage of the cross-flow fan blade is reduced; meanwhile, the surge condition is avoided and improved by a principle control optimizing mode, and the user experience is greatly improved. The invention aims at the unfavorable condition of surge in the using process of a user, judges and optimizes the surge phenomenon, and improves the user experience. According to the invention, by judging surge, adding a surge judging function of the air conditioner and outputting fault codes, a user can conveniently carry out self-check and after-sale maintenance; after identification, according to the reason of surge, the program is adjusted, the surge condition is improved, optimized and even solved, and the user experience is improved.
Description
Technical Field
The invention belongs to the technical field of surge judgment optimization, and particularly relates to a control method, a controller, a cross-flow fan and an air conditioner for surge judgment and optimization.
Background
At present, with social progress and continuous improvement of life quality, the requirement of people on air conditioner comfort is also improved, and noise is just one of key influence factors of the air conditioner comfort. Wall-mounted air conditioners generally adopt cross-flow blades for air supply, and the cross-flow blades have the characteristics of smooth air outlet, low noise and the like and are very household. However, the wind resistance of the cross-flow fan blade is relatively poor, and under some special conditions, a surge phenomenon (surge refers to periodic air outlet and backflow of a fan) is easily generated, indirect airflow pulsation and little noise are shown, and the comfort use experience of a user on an air conditioner is influenced.
The main causes of surge formation are as follows:
1. internal cause: the pneumatic parameters (such as the position of the eccentric vortex core) of the cross-flow fan are not matched with the structural parameters (such as the molded line, the radius, various gaps and the like of the volute tongue); the air outlet at two ends of the whole air duct system is less, the air speed is low, the local pressure difference is too large, and the air flow operation is unstable. Through retrieval, many patents are optimized by front end design from pneumatic parameters and structural parameters, so as to improve the surge condition.
2. External factors: the cross-flow fan blade and the like are matched and shaped, and operate for a long time under the working condition of an unstable area. Especially, in the case of a small flow rate due to a large intake resistance, a low wind speed (medium-low wind level), a low pressure of the outlet wind, and a surge easily occurs, for example: 1. the filter screen is dirty and blocked and the like in the using process has large air inlet resistance; 2. the evaporator is dirty and blocked, or the operation is high frequency, the wind speed is too low, the water hanging of the evaporator is serious, the wind resistance is large, and the flow is low.
The surge characteristic is as follows: the air outlet and the backflow occur periodically, the noise is large, the vibration is large, the fluctuation of the rotating speed of a motor of the transmission fan is large, and the periodic change is realized.
Meanwhile, the commonly used cross-flow fan blade of the air conditioner also has a surge phenomenon, and the surge damage is more, such as noise increase and vibration increase, and in severe cases, the fan blade structure can be damaged. Through search, a plurality of existing patents about surge and cross-flow fan blades are mainly optimized and reduced in the structural form, and cannot be substantially optimized and reduced in the surge phenomenon from control logic. For example: CN110486322A, an anti-surge through-flow fan blade and air conditioner disclose: the cross-flow fan blade can compensate air quantity and air speed at two ends by arranging the pressure difference balancing component, balance pressure difference and achieve the purpose of resisting surge of the whole machine.
Through the above analysis, the problems and defects of the prior art are as follows: the existing methods for reducing surge and optimizing cross-flow fan blades mainly optimize and reduce the occurrence of surge in structural form, and cannot actually optimize and reduce the surge phenomenon from control logic.
In the prior art, the optimization of surging exists in a development stage, the design of the cross-flow fan blade and the matching of the air duct and the volute tongue do not have judgment of corresponding functional logic for inspection after batch production, only the cost can be increased, and the optimization is performed by adding parts.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a control method for surge judgment and optimization, a controller, a cross-flow fan and an air conditioner.
The invention is realized in such a way, a control method for surge judgment and optimization is applied to an air conditioner, and the control method for surge judgment and optimization comprises the following steps:
when the fan reaches a set rotating speed, reading the current wind shield, reading a built-in rotating speed value Z of the wind shield, and continuously detecting and recording an absolute value delta Z of a difference value between the actual rotating speed of the fan and Z;
judging whether the fluctuation of the rotating speed of the fan is abnormal or not, judging whether delta Z is larger than a C value or not, and if N times are met, judging surging;
if the rotating speed of the fan is stable, the fan continues to operate and monitors whether the rotating speed of the inner fan is abnormal or not;
if the surge is judged, outputting a fault code to remind a user of repairing after sale or reminding of cleaning a filter screen or an evaporator;
detecting whether the current gear is the highest or not by optimizing surge operation logic; if the wind gear is the highest, stopping the machine for processing;
if judging that the wind gear is not the highest rotating speed, the wind gear is lifted, and whether surging occurs or not is judged; meanwhile, the first gear rotating speed is increased, the number of the previous recorded times is reset, whether the new rotating speed surges or not is judged, and the operating frequency maintains the operating frequency of the previous gear;
if the surge is judged, the machine is stopped; if the non-surge is judged, a fault code is output, the operation is continued, and whether the rotating speed of the inner fan is abnormal or not is monitored.
Further, after the fan is started and operated for 5min, the fan reaches a set rotating speed, the current wind shield is read, and a built-in rotating speed value Z of the wind shield is read;
the value of C is 200;
recording is performed 1 time each time the condition is met, and if the condition is met 6 times, surging is judged.
Further, the continuing to operate and monitoring whether the rotating speed of the inner fan is abnormal comprises: and (3) detecting and comparing the fluctuation of the rotating speed of the motor, and simultaneously detecting through electric parameters of current and power, or detecting relevant feedback surge information by using air volume.
Further, the optimized surge operation logic comprises:
detecting whether the current gear is the highest, and if the gear is the highest, stopping the machine;
if the wind gear is not at the highest rotating speed, the wind outlet pressure is increased by increasing the wind gear and increasing the flow, the backflow surge is reduced or avoided, and meanwhile, the operation frequency is kept at the operation frequency of the previous wind gear, and the frequency is increased without increasing the wind gear.
And further, the wind gear is lifted or replaced by iterative gear lifting, and the fan is continuously maintained to operate until the wind gear is lifted to the highest wind gear.
Another object of the present invention is to provide a controller applied to an air conditioner for operating the surge determination and optimized control method.
Another object of the present invention is to provide a cross-flow fan which is mounted on a wall and which performs the above-described surge determination and optimization control method.
Another object of the present invention is to provide an air conditioner equipped with the cross-flow fan, which performs the surge determination and optimization after performing a self-cleaning function.
It is another object of the present invention to provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the surge determination and optimized control method.
Another object of the present invention is to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the surge determination and optimized control method.
By combining all the technical schemes, the invention has the advantages and positive effects that: the surge judgment and optimization control method and the air conditioner thereof provided by the invention can judge and optimize the surge phenomenon aiming at the unfavorable condition of surge in the using process of a user, thereby improving the user experience. According to the invention, by judging surge, adding a surge judging function of the air conditioner and outputting fault codes, a user can conveniently carry out self-check and after-sale maintenance; after identification, according to the reason of surge, the program is adjusted, the surge condition is improved, optimized and even solved, and the user experience is improved.
Meanwhile, according to the principle, the characteristics and the phenomenon of the surge condition of the cross-flow fan blade, detection is made and the judgment of the surge phenomenon is judged, when the surge is judged, a fault code is output in time, a user is reminded to clean the system in time, the maintenance direction and the reason are conveniently locked after sale, and the possibility of permanent damage of the cross-flow fan blade is reduced; meanwhile, the surge condition is avoided and improved by a principle control optimizing mode, and the user experience is greatly improved.
In addition, the invention identifies the surge condition, namely the newly added function, and records the fault code, thereby facilitating the after-sale judgment and maintenance.
The invention provides a principle control optimizing mode, which can be used subsequently under the condition of effective optimizing, thereby avoiding shutdown and influencing the use of users.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart of a control method for surge determination and optimization according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the invention provides a control method for surge determination and optimization, a controller, a cross-flow fan and an air conditioner, and the invention is described in detail with reference to the accompanying drawings.
As shown in fig. 1, the surge determination and optimization control method and the air conditioner thereof provided by the embodiment of the invention comprise the following steps:
s101, starting up, after running for t time, enabling the fan to reach a set rotating speed, reading a current wind shield, reading a built-in rotating speed value Z of the wind shield, and continuously detecting and recording an absolute value delta Z of a difference value between the actual rotating speed of the fan and Z;
s102, judging whether the fan rotating speed is abnormal in fluctuation or not, judging whether delta Z is larger than a C value or not, recording for 1 time when the delta Z is satisfied once, and judging surging if the delta Z is satisfied for N times;
s103, if the rotating speed of the fan stably runs and the fan is in a non-surge condition, continuing to run and monitoring whether the rotating speed of the inner fan is abnormal;
s104, if the surge is judged, outputting a fault code, reminding a user to report after-sale maintenance or reminding the user to clean a filter screen or an evaporator, and enabling after-sale professional to judge whether the filter screen or the evaporator is abnormal or not in time and stopping loss in time;
s105, through a logic function, whether the surge condition can be optimized or not is judged; detecting whether the current gear is the highest; if the wind gear is the highest, stopping the machine for processing;
s106, if judging that the wind gear is not the highest rotating speed, increasing the speed, and judging whether surging occurs; meanwhile, the first gear rotating speed is increased, the number of the previous recorded times is reset, whether the new rotating speed surges or not is judged, and the operating frequency maintains the operating frequency of the previous gear;
s107, if surging is judged, stopping the machine; if the non-surge is judged, a fault code is output, the operation is continued, and whether the rotating speed of the inner fan is abnormal or not is monitored.
The present invention will be further described with reference to the following examples.
The main causes of surge formation are as follows:
(1) internal cause: the pneumatic parameters (such as the position of the eccentric vortex center) of the cross-flow fan are not matched with the structural parameters (such as the volute tongue-shaped line, the radius, various gaps and the like); the air outlet at two ends of the whole air duct system is less, the air speed is low, the local pressure difference is too large, and the air flow operation is unstable. Through retrieval, many patents are optimized by front end design from pneumatic parameters and structural parameters, so as to improve the surge condition.
(2) External factors: the cross-flow fan blade and the like are matched and shaped, and operate for a long time under the working condition of an unstable area. Especially, the surge condition is easily generated under the conditions of small flow, low wind speed (medium and low wind gear), low pressure of outlet wind and the like caused by large air inlet resistance, and the like, as follows: 1. when the evaporator is used, the filter screen is dirty and blocked, and the like, and the air inlet resistance is large 2. the evaporator is dirty and blocked, or the evaporator runs at high frequency and has too low air speed, the water hanging of the evaporator is serious, the wind resistance is large, and the flow is low, and the like.
The surge characteristic is as follows: the air outlet and the backflow occur periodically, the noise is large, the vibration is large, the fluctuation of the rotating speed of a motor of the transmission fan is large, and the periodic change is realized.
According to the principle and the introduction, when the surge condition occurs, keywords relevant to the patent are extracted
In connection with the determination: the periodicity and the fluctuation are large, namely the fluctuation of the noise rotating speed of the fan motor is large, and the fluctuation of the current power and the like is large.
In connection with the optimization improvement: reminding, namely inputting a fault code and reminding a user of physically cleaning a filter screen, an evaporator and the like; speed regulation, speed (wind gear) lifting, evaporator tube temperature lifting, evaporator water hanging reduction (limiting frequency rising, effective in a refrigeration mode, principle for reducing indoor unit water hanging, reducing wind resistance).
The invention is further described with reference to specific examples.
Examples
A surge judgment and optimization control logic and an air conditioner implementing method thereof are as follows:
starting the wind turbine, after running for t time (the fan reaches a set rotating speed), for example, after 5min, reading a current wind gear, reading a built-in rotating speed value Z of the wind gear (according to a normal production condition, an actual rotating speed is executed according to a target rotating speed, and the difference value is small), and continuously detecting and recording an absolute value delta Z of the difference value between the actual rotating speed of the fan and Z; judging whether the rotating speed of the fan fluctuates abnormally or not, judging whether the delta Z is larger than a C value or not, for example, the C value is 200, recording for 1 time when the C value is satisfied once, judging surging if the N times is satisfied, for example, the N value is 6, judging that the surging is generated, the surging noise is large, the vibration is large, the blade is seriously damaged or even damaged, and continuing to operate and monitoring whether the rotating speed of the inner fan is abnormal or not if the rotating speed of the fan is stably operated and the non-surging condition exists; if the surge is judged, outputting a fault code, reminding a user to report after-sale maintenance or reminding the user to clean a filter screen or an evaporator, and timely judging whether the after-sale specialty is abnormal or not and stopping loss in time; meanwhile, through a logic function, whether the surge condition can be optimized or not is judged, the user experience is improved, and the complaint of the user is avoided.
The optimization operation is as follows: and detecting whether the current gear is the highest or not, and if so, stopping the machine. If the wind gear is not at the highest rotating speed, the wind gear is lifted through lifting flow, the air outlet pressure is lifted, backflow surge is reduced or avoided, meanwhile, the operation frequency is kept at the operation frequency of the previous wind gear, the operation is not carried out along with the lifting of the wind gear, and the frequency is increased.
In the invention, the expansion scheme comprises the following steps:
1) the motor speed fluctuation detection and comparison can be carried out by detecting electric parameters such as current, power and the like, or relevant feedback surge information is detected by using air volume;
2) as the flow chart mainly considers refrigeration, the frequency optimization scheme mainly aims at refrigeration, reduces the water hanging condition of the evaporator, and does not need the wind gear limitation of frequency operation during heating;
3) and (4) wind gear lifting optimization can be carried out iteratively until the position of the highest wind gear is reached, and only one gear is lifted for optimization without limitation.
4) If the air conditioner has the functions of self-cleaning and the like, reminding and optimization can be carried out after the self-cleaning function is executed.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A control method for surge judgment and optimization is applied to an air conditioner, and comprises the following steps:
when the fan reaches a set rotating speed, reading the current wind shield, reading a built-in rotating speed value Z of the wind shield, and continuously detecting and recording an absolute value delta Z of a difference value between the actual rotating speed of the fan and Z;
judging whether the fluctuation of the rotating speed of the fan is abnormal or not, judging whether delta Z is larger than a C value or not, and if N times are met, judging surging;
if the rotating speed of the fan is stable, the fan continues to operate and monitors whether the rotating speed of the inner fan is abnormal or not;
if the surge is judged, outputting a fault code to remind a user of repairing after sale or reminding of cleaning a filter screen or an evaporator;
detecting whether the current gear is the highest or not by optimizing surge operation logic; if the wind gear is the highest, stopping the machine for processing;
if judging that the wind gear is not the highest rotating speed, the wind gear is lifted, and whether surging occurs or not is judged; meanwhile, the first gear rotating speed is increased, the number of the previous recorded times is reset, whether the new rotating speed surges or not is judged, and the operating frequency maintains the operating frequency of the previous gear;
if the surge is judged, the machine is stopped; if the non-surge is judged, a fault code is output, the operation is continued, and whether the rotating speed of the inner fan is abnormal or not is monitored.
2. The surge determination and optimization control method according to claim 1, wherein after starting up and running for 5min, the fan reaches a predetermined rotation speed, reads the current wind gear and reads a built-in rotation speed value Z of the wind gear;
the value of C is 200;
recording is performed 1 time each time the condition is met, and if the condition is met 6 times, surging is judged.
3. The surge determination and optimized control method according to claim 1, wherein said continuing to operate and monitoring the inner fan speed for anomalies comprises: and (3) detecting and comparing the fluctuation of the rotating speed of the motor, and simultaneously detecting through electric parameters of current and power, or detecting relevant feedback surge information by using air volume.
4. The surge determination and optimized control method of claim 1, wherein the optimized surge operation logic comprises:
detecting whether the current gear is the highest, and if the gear is the highest, stopping the machine;
if the wind gear is not at the highest rotating speed, the wind outlet pressure is increased by increasing the wind gear and increasing the flow, the backflow surge is reduced or avoided, and meanwhile, the operation frequency is kept at the operation frequency of the previous wind gear, and the frequency is increased without increasing the wind gear.
5. The surge determination and optimized control method according to claim 4, wherein the raising of the wind shift is replaced by an iterative shift-up until the wind shift is raised to the highest wind shift position, and the fan operation is maintained.
6. A controller applied to an air conditioner for operating the surge determination and optimization control method according to any one of claims 1 to 5.
7. A crossflow blower which is a wall-mounted type, on which a controller according to claim 6 is mounted, and which implements a control method for surge determination and optimization according to any one of claims 1 to 5.
8. An air conditioner, characterized in that the air conditioner is provided with the cross-flow fan of claim 7, and after the self-cleaning function is executed, the surge judgment and optimization control method of any one of claims 1 to 5 is performed.
9. A computer readable storage medium storing instructions which, when executed on a computer, cause the computer to perform a surge determination and optimized control method as claimed in any one of claims 1 to 5.
10. A computer device, characterized in that the computer device comprises a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to carry out the surge determination and optimized control method of any one of claims 1-5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883672A (en) * | 2021-09-13 | 2022-01-04 | Tcl空调器(中山)有限公司 | Noise type identification method, air conditioner and computer readable storage medium |
| CN115682299A (en) * | 2022-10-25 | 2023-02-03 | 珠海格力电器股份有限公司 | Filter screen filth blockage treatment method and device and air conditioner |
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| JP2000016056A (en) * | 1998-07-06 | 2000-01-18 | Matsushita Electric Ind Co Ltd | Cooling unit for automobile |
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| CN113883672B (en) * | 2021-09-13 | 2022-11-15 | Tcl空调器(中山)有限公司 | Noise type identification method, air conditioner and computer readable storage medium |
| CN115682299A (en) * | 2022-10-25 | 2023-02-03 | 珠海格力电器股份有限公司 | Filter screen filth blockage treatment method and device and air conditioner |
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