CN114893884B - Control method for refrigerating overload protection of fixed-frequency air conditioner and air conditioner - Google Patents
Control method for refrigerating overload protection of fixed-frequency air conditioner and air conditioner Download PDFInfo
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- CN114893884B CN114893884B CN202210434529.9A CN202210434529A CN114893884B CN 114893884 B CN114893884 B CN 114893884B CN 202210434529 A CN202210434529 A CN 202210434529A CN 114893884 B CN114893884 B CN 114893884B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F2140/20—Heat-exchange fluid temperature
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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 embodiment of the application provides a control method for refrigerating overload protection of a fixed-frequency air conditioner and the air conditioner. The control method for refrigerating overload protection of the fixed-frequency air conditioner comprises the following steps: after the air conditioner operates for a first preset time in a stable refrigeration mode, the rotating speed of the indoor fan is obtained; and controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil under the condition that the rotating speed of the indoor fan is larger than the rotating speed threshold of the indoor fan. The application solves the technical problems that in the process of refrigerating a fixed-frequency air conditioner, when the temperature of an outer ring is increased, a unit cannot be correspondingly changed in time, so that the load of the unit is too high to cause the abrasion of a compressor, and the service life of the unit is reduced.
Description
Technical Field
The application relates to the technical field of air conditioner control, in particular to a control method for refrigerating overload protection of a fixed-frequency air conditioner and the air conditioner.
Background
With the development of technology and the increasing level of living of people, air conditioners become an indispensable home appliance in the life of people. With the gradual maturity of the technology in the household appliances and the gradual and competitive trend, the quality requirements of consumers on the air conditioner are also higher.
However, in the process of refrigerating the fixed-frequency air conditioner, when the temperature of the outer ring is increased, the unit cannot be correspondingly changed in time, so that the compressor is worn due to overhigh load of the unit, and the service life of the unit is reduced.
Disclosure of Invention
In order to solve the problems that in the refrigerating process of a fixed-frequency air conditioner, when the temperature of an outer ring is increased, a unit cannot be changed correspondingly in time, so that the load of the unit is too high, the compressor is worn, and the service life of the unit is reduced, the application provides a control method for refrigerating overload protection of the fixed-frequency air conditioner, which comprises the following steps: after the air conditioner operates for a first preset time in a stable refrigeration mode, the rotating speed of the indoor fan is obtained; and controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil under the condition that the rotating speed of the indoor fan is larger than the rotating speed threshold of the indoor fan.
The technical effect achieved after the technical scheme is adopted is as follows: when the fixed-frequency air conditioner is in refrigeration operation under a high-temperature environment, if the rotating speed of the indoor fan is larger than the rotating speed threshold value of the indoor fan, the operation load of the current air conditioner is higher, so that the operation state of the indoor fan is controlled by combining the change trend of the temperature of the indoor coil and the temperature of the outdoor coil, and the operation state of the indoor fan is correspondingly adjusted in time on the premise of ensuring the operation reliability of the air conditioner so as to control the operation load of the air conditioner, prolong the operation time of a unit and prolong the service life of the unit.
In this embodiment, the controlling the operating state of the indoor fan according to the outdoor coil temperature change rate and the indoor coil temperature includes: controlling the running state of the indoor fan according to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold of the outdoor coil; and/or controlling the running state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold.
The technical effect achieved after the technical scheme is adopted is as follows: according to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold of the outdoor coil, the change trend of the temperature of the outdoor coil and the change trend of the running load of the air conditioner can be known, so that the running state of the indoor fan can be timely and accurately adjusted according to the change trend of the running load of the air conditioner. According to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil, whether the indoor coil is in a state of easy condensation or easy icing can be known, and therefore accurate judgment basis can be provided for adjustment of the running state of the indoor fan.
In this embodiment, if K is smaller than B, after the indoor fan is controlled to continue to stably run at the current rotation speed for the first preset period of time, the operation of obtaining the rotation speed of the indoor fan is performed in a circulating manner; wherein K is the temperature change rate of the outdoor coil; b is a first outdoor coil temperature rate of change threshold.
The technical effect achieved after the technical scheme is adopted is as follows: if K is smaller than B, the running load of the current air conditioner does not develop towards the high load direction, so that the indoor fan is controlled to continue to run stably for a first preset time at the current rotating speed, and then the operation of acquiring the rotating speed of the indoor fan is executed in a circulating mode to perform periodic circulating control.
In the embodiment, if B is not less than K is not less than C, controlling the running state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold; wherein K is the temperature change rate of the outdoor coil; b is a first outdoor coil temperature change rate threshold; c is a second outdoor coil temperature change rate threshold; b is less than C.
The technical effect achieved after the technical scheme is adopted is as follows: if B is less than or equal to K is less than or equal to C, the operation load of the current air conditioner is developed towards the high load direction, but the operation load which can be born by the air conditioner is not exceeded, and therefore the operation state of the indoor fan is controlled according to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil.
In this embodiment, if C is less than K, the air conditioner is controlled to start overload protection so as to control the indoor fan to stop running; wherein K is the temperature change rate of the outdoor coil; c is a second outdoor coil temperature rate of change threshold.
The technical effect achieved after the technical scheme is adopted is as follows: if C is less than K, the operation load of the current air conditioner is rapidly increased, and the operation load possibly exceeds the operation load born by the air conditioner at any time, so that the air conditioner is controlled to start overload protection, and the indoor fan is controlled to stop operation, so that the problems of compressor abrasion and unit service life reduction caused by overhigh unit load are avoided.
In this embodiment, the controlling the operation state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold includes: if T Inner disc And if not less than D, reducing the rotating speed of the indoor fan according to the rotating speed threshold of the indoor fan, the temperature change rate threshold of the first outdoor coil and the temperature change rate of the outdoor coil; wherein T is Inner disc The temperature of the indoor coil pipe is set; d is the indoor coil temperature threshold.
The technical effect achieved after the technical scheme is adopted is as follows: if T Inner disc And if the temperature of the indoor coil is not very low, the rotating speed of the indoor fan can be properly reduced, so that the rotating speed of the indoor fan is reduced according to the rotating speed threshold of the indoor fan, the temperature change rate threshold of the first outdoor coil and the temperature change rate of the outdoor coil, and the rotating speed of the indoor fan is accurately adjusted.
In this embodiment, the reducing the indoor fan speed according to the indoor fan speed threshold, the first outdoor coil temperature change rate threshold, and the outdoor coil temperature change rate includes: m=n- (N-A) × (C-K); wherein A is the threshold value of the rotating speed of the indoor fan; n is the rotation speed of the indoor fan before adjustment; m is the rotation speed of the indoor fan after adjustment.
The technical effect achieved after the technical scheme is adopted is as follows: the larger the difference between the indoor fan rotating speed before adjustment and the indoor fan rotating speed threshold value is, the larger the space for reducing the indoor fan rotating speed is; the greater the difference between the outdoor coil temperature change rate and the second outdoor coil temperature change rate threshold value, the faster the operating load of the air conditioner is developing toward a high load direction, so the lower the adjusted indoor fan speed.
In this embodiment, the controlling the operation state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold further includes: if T Inner disc If the rotational speed of the indoor fan is less than D, controlling the indoor fan to continue to stably operate for the first preset time period at the current rotational speed, and circularly executing the operation for acquiring the rotational speed of the indoor fan; wherein T is Inner disc The temperature of the indoor coil pipe is set; d is the indoor coil temperature threshold.
The technical effect achieved after the technical scheme is adopted is as follows: if T Inner disc And D, indicating that the temperature of the current indoor coil is lower, and if the indoor coil is in a state of easy condensation or easy icing, controlling the indoor fan to continue to stably run at the current rotating speed for the first preset time period so as to acquire the rotating speed of the indoor fan, and performing periodic circulation control.
In this embodiment, the control method for refrigeration overload protection of a fixed-frequency air conditioner further includes: and under the condition that the rotating speed of the indoor fan is equal to the rotating speed threshold value of the indoor fan, controlling the indoor fan to continuously and stably operate at the current rotating speed for the first preset time period, and circularly executing the operation of acquiring the rotating speed of the indoor fan.
The technical effect achieved after the technical scheme is adopted is as follows: if the rotation speed of the indoor fan is equal to the threshold value of the rotation speed of the indoor fan, the current indoor fan is operated at the lowest rotation speed capable of running stably, so that the indoor fan is controlled to continue to run stably at the current rotation speed for the first preset time period, and then the operation of acquiring the rotation speed of the indoor fan is executed circularly.
The embodiment of the application provides an air conditioner, which comprises: the acquisition module is used for acquiring the rotating speed of the indoor fan after the air conditioner operates for a first preset time in a stable refrigeration mode; and the control module is used for controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil under the condition that the rotating speed of the indoor fan is larger than the rotating speed threshold of the indoor fan.
The embodiment of the application provides an air conditioner, which comprises: a computer readable storage medium storing a computer program and a packaged IC, the computer program when read and run by the packaged IC, the air conditioner implementing the control method of fixed frequency air conditioner refrigeration overload protection as described in any one of the previous embodiments.
In summary, the foregoing embodiments of the present application may have one or more of the following advantages or benefits:
(1) When the fixed-frequency air conditioner is in refrigeration operation under a high-temperature environment, if the rotating speed of the indoor fan is larger than the rotating speed threshold value of the indoor fan, the operation load of the current air conditioner is higher, so that the operation state of the indoor fan is controlled by combining the change trend of the temperature of the indoor coil and the temperature of the outdoor coil, and the operation state of the indoor fan is correspondingly adjusted in time on the premise of ensuring the operation reliability of the air conditioner so as to control the operation load of the air conditioner, prolong the operation time of a unit and prolong the service life of the unit.
(2) According to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold of the outdoor coil, the change trend of the temperature of the outdoor coil and the change trend of the running load of the air conditioner can be known, so that the running state of the indoor fan can be timely and accurately adjusted according to the change trend of the running load of the air conditioner. According to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil, whether the indoor coil is in a state of easy condensation or easy icing can be known, and therefore accurate judgment basis can be provided for adjustment of the running state of the indoor fan.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a control method for refrigerating overload protection of a fixed-frequency air conditioner according to a first embodiment of the present application.
Fig. 2 is a schematic diagram of a specific flow chart of a control method for refrigerating overload protection of the fixed-frequency air conditioner in fig. 1.
Fig. 3 is a schematic block diagram of an air conditioner according to a second embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
[ first embodiment ]
Referring to fig. 1, a flow chart of a control method for refrigeration overload protection of a fixed-frequency air conditioner according to a first embodiment of the present application is shown. The control method for refrigerating overload protection of the fixed-frequency air conditioner comprises the following steps: after the air conditioner operates for a first preset time in a stable refrigeration mode, the rotating speed of the indoor fan is obtained; and controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil under the condition that the rotating speed of the indoor fan is larger than the rotating speed threshold of the indoor fan. The indoor fan rotating speed threshold value is the lowest rotating speed of the indoor fan capable of running stably; the rotating speed of the indoor fan is the conventional rotating speed of the indoor fan when the air conditioner is in conventional operation. For example, the preferred value of the first preset duration is 5min; the rotating speed threshold of the indoor fan is marked as A, and the rotating speed of the indoor fan is marked as N; a has a value ranging from 200 to 600, and A has a preferred value of 400; n has a value in the range of 400-1600 and N has a preferred value of 1200.
It can be understood that when the fixed-frequency air conditioner is in refrigeration operation under a high-temperature environment, if the rotation speed of the indoor fan is greater than the rotation speed threshold value of the indoor fan, the operation load of the current air conditioner is higher, so that the operation state of the indoor fan is controlled by combining the change trend of the temperature of the indoor coil and the temperature of the outdoor coil, and the operation state of the indoor fan is correspondingly adjusted in time on the premise of ensuring the operation reliability of the air conditioner so as to control the operation load of the air conditioner, prolong the operation time of a unit and prolong the service life of the unit.
Further, the controlling the operation state of the indoor fan according to the change rate of the outdoor coil temperature and the indoor coil temperature includes: controlling the running state of the indoor fan according to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold of the outdoor coil; and/or controlling the running state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold.
It can be understood that according to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold of the outdoor coil, the change trend of the temperature of the outdoor coil and the change trend of the running load of the air conditioner can be known, so that the running state of the indoor fan can be timely and accurately adjusted according to the change trend of the running load of the air conditioner. According to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil, whether the indoor coil is in a state of easy condensation or easy icing can be known, and therefore accurate judgment basis can be provided for adjustment of the running state of the indoor fan.
Further, if K is smaller than B, the indoor fan is controlled to continue to stably run for the first preset time period at the current rotation speed, and then the operation of obtaining the rotation speed of the indoor fan is circularly executed; wherein K is the temperature change rate of the outdoor coil; b is a first outdoor coil temperature rate of change threshold. For example, K isThe first outdoor coil temperature change rate threshold B has a value ranging from 0 to 10, with a preferred value of 2.
It can be understood that if K is smaller than B, it indicates that the current operation load of the air conditioner does not develop toward the high load direction, so that the indoor fan is controlled to continue to stably operate at the current rotation speed for a first preset period of time, and then the operation of obtaining the rotation speed of the indoor fan is performed in a recycling manner, so as to perform periodic cycle control.
Further, if B is less than or equal to K is less than or equal to C, controlling the running state of the indoor fan according to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil; wherein K is the temperature change rate of the outdoor coil; b is a first outdoor coil temperature change rate threshold; c is a second outdoor coil temperature change rate threshold; b is less than C. For example, the second outdoor coil temperature change rate threshold C may have a value ranging from 5 to 10, with a preferred value of 10 for the second outdoor coil temperature change rate threshold C.
It can be understood that if B is less than or equal to K is less than or equal to C, it indicates that the current operation load of the air conditioner is developing toward high load, but the operation load that the air conditioner can bear is not exceeded, so that the operation state of the indoor fan is controlled according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold.
Further, if C is smaller than K, controlling the air conditioner to start overload protection so as to control the indoor fan to stop running; wherein K is the temperature change rate of the outdoor coil; c is a second outdoor coil temperature rate of change threshold.
It can be understood that if C is less than K, it indicates that the current operation load of the air conditioner is rapidly increasing, and is possible to exceed the operation load that the air conditioner can bear at any time, so that the air conditioner is controlled to start overload protection, and the indoor fan is controlled to stop running, so as to avoid the problems of compressor wear and reduced service life caused by overhigh unit load.
Further, the controlling the operation state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold value includes: if T Inner disc And if not less than D, reducing the rotating speed of the indoor fan according to the rotating speed threshold of the indoor fan, the temperature change rate threshold of the first outdoor coil and the temperature change rate of the outdoor coil; wherein T is Inner disc The temperature of the indoor coil pipe is set; d is the indoor coil temperature threshold. For example, the indoor coil temperature threshold D may have a value ranging from 0 to 8, with a preferred value of 4.
It will be appreciated that if T Inner disc And if the temperature of the indoor coil is not very low, the rotating speed of the indoor fan can be properly reduced, so that the rotating speed of the indoor fan is reduced according to the rotating speed threshold of the indoor fan, the temperature change rate threshold of the first outdoor coil and the temperature change rate of the outdoor coil, and the rotating speed of the indoor fan is accurately adjusted.
Further, the reducing the indoor fan speed according to the indoor fan speed threshold, the first outdoor coil temperature change rate threshold, and the outdoor coil temperature change rate includes: m=n- (N-A) × (C-K); wherein A is the threshold value of the rotating speed of the indoor fan; n is the rotation speed of the indoor fan before adjustment; m is the rotation speed of the indoor fan after adjustment.
It can be understood that the larger the difference between the indoor fan rotation speed before adjustment and the indoor fan rotation speed threshold value, the larger the space for showing that the indoor fan rotation speed can be reduced; the greater the difference between the outdoor coil temperature change rate and the second outdoor coil temperature change rate threshold value, the faster the operating load of the air conditioner is developing toward a high load direction, so the lower the adjusted indoor fan speed.
Further, the controlling the operation state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold value further includes: if T Inner disc If the rotational speed of the indoor fan is less than D, controlling the indoor fan to continue to stably operate for the first preset time period at the current rotational speed, and circularly executing the operation for acquiring the rotational speed of the indoor fan; wherein T is Inner disc The temperature of the indoor coil pipe is set; d is the indoor coil temperature threshold.
It will be appreciated that if T Inner disc And D, indicating that the temperature of the current indoor coil is lower, and if the indoor coil is in a state of easy condensation or easy icing, controlling the indoor fan to continue to stably run at the current rotating speed for the first preset time period so as to acquire the rotating speed of the indoor fan, and performing periodic circulation control.
Further, the control method for refrigerating overload protection of the fixed-frequency air conditioner further comprises the following steps: and under the condition that the rotating speed of the indoor fan is equal to the rotating speed threshold value of the indoor fan, controlling the indoor fan to continuously and stably operate at the current rotating speed for the first preset time period, and circularly executing the operation of acquiring the rotating speed of the indoor fan.
It can be understood that if the rotational speed of the indoor fan is equal to the threshold value of the rotational speed of the indoor fan, it is indicated that the current indoor fan is running at the lowest rotational speed capable of running stably, so that the operation of obtaining the rotational speed of the indoor fan is performed in a circulating manner after the indoor fan is controlled to continue to run stably at the current rotational speed for the first preset period.
[ second embodiment ]
A second embodiment of the present application provides an air conditioner. Referring to fig. 2, the air conditioner 100 includes, for example: the obtaining module 110 is configured to obtain a rotational speed of the indoor fan after the air conditioner operates for a first preset period of time in a stable refrigeration mode; the control module 120 is configured to control an operation state of the indoor fan according to the outdoor coil temperature change rate and the indoor coil temperature when the indoor fan rotation speed is greater than the indoor fan rotation speed threshold.
In one embodiment, the obtaining module 110 and the control module 120 cooperate with each other to implement the control method for refrigeration overload protection of the fixed-frequency air conditioner according to any one of the embodiments described in the first embodiment, which is not described herein.
[ third embodiment ]
A third embodiment of the present application provides an air conditioner. The air conditioner includes: the control method for refrigerating overload protection of the constant-frequency air conditioner provided by the first embodiment of the application is realized by the air conditioner when the computer program is read and run by the packaged IC.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (5)
1. The control method for refrigerating overload protection of the fixed-frequency air conditioner is characterized by comprising the following steps of:
after the air conditioner operates for a first preset time in a stable refrigeration mode, the rotating speed of the indoor fan is obtained;
controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil under the condition that the rotating speed of the indoor fan is larger than the rotating speed threshold of the indoor fan;
the controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil comprises the following steps:
controlling the running state of the indoor fan according to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold of the outdoor coil; and/or, the number of the groups,
controlling the running state of the indoor fan according to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil;
the controlling the running state of the indoor fan according to the magnitude relation between the temperature change rate of the outdoor coil and the temperature change rate threshold value of the outdoor coil comprises:
if K is smaller than B, controlling the indoor fan to continue to stably run at the current rotating speed for the first preset time period, and circularly executing the operation of acquiring the rotating speed of the indoor fan;
wherein K is the temperature change rate of the outdoor coil; b is a first outdoor coil temperature change rate threshold;
if B is less than or equal to K is less than or equal to C, controlling the running state of the indoor fan according to the magnitude relation between the temperature of the indoor coil and the temperature threshold value of the indoor coil;
wherein K is the temperature change rate of the outdoor coil; b is a first outdoor coil temperature change rate threshold; c is a second outdoor coil temperature change rate threshold; b is less than C;
if C is less than K, controlling the air conditioner to start overload protection;
wherein K is the temperature change rate of the outdoor coil; c is a second outdoor coil temperature change rate threshold;
the controlling the running state of the indoor fan according to the magnitude relation between the indoor coil temperature and the indoor coil temperature threshold value comprises the following steps:
if T Inner disc And if not less than D, reducing the rotating speed of the indoor fan according to the rotating speed threshold of the indoor fan, the temperature change rate threshold of the first outdoor coil and the temperature change rate of the outdoor coil;
wherein T is Inner disc The temperature of the indoor coil pipe is set; d is the temperature threshold of the indoor coil;
if T Inner disc If the rotational speed of the indoor fan is less than D, controlling the indoor fan to continue to stably operate for the first preset time period at the current rotational speed, and circularly executing the operation for acquiring the rotational speed of the indoor fan;
wherein T is Inner disc The temperature of the indoor coil pipe is set; d is the indoor coil temperature threshold.
2. The method of claim 1, wherein said reducing the indoor fan speed based on the indoor fan speed threshold, the first outdoor coil temperature change rate threshold, and the outdoor coil temperature change rate comprises:
M=N-(N-A)*(C-K)；
wherein A is the threshold value of the rotating speed of the indoor fan; n is the rotation speed of the indoor fan before adjustment; m is the rotation speed of the indoor fan after adjustment.
3. The control method for refrigerating overload protection of a fixed-frequency air conditioner according to claim 1, wherein the control method for refrigerating overload protection of a fixed-frequency air conditioner further comprises:
and under the condition that the rotating speed of the indoor fan is equal to the rotating speed threshold value of the indoor fan, controlling the indoor fan to continuously and stably operate at the current rotating speed for the first preset time period, and circularly executing the operation of acquiring the rotating speed of the indoor fan.
4. An air conditioner, characterized in that the air conditioner realizes the control method of the constant-frequency air conditioner refrigeration overload protection according to any one of claims 1 to 3, and the air conditioner comprises:
the acquisition module is used for acquiring the rotating speed of the indoor fan after the air conditioner operates for a first preset time in a stable refrigeration mode;
and the control module is used for controlling the running state of the indoor fan according to the temperature change rate of the outdoor coil and the temperature of the indoor coil under the condition that the rotating speed of the indoor fan is larger than the rotating speed threshold of the indoor fan.
5. An air conditioner, characterized in that the air conditioner comprises: a memory storing a computer program and a packaged IC, the computer program realizing the control method of the constant frequency air conditioner refrigeration overload protection according to any one of claims 1-3 when being read by the packaged IC and run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210434529.9A CN114893884B (en) | 2022-04-24 | 2022-04-24 | Control method for refrigerating overload protection of fixed-frequency air conditioner and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210434529.9A CN114893884B (en) | 2022-04-24 | 2022-04-24 | Control method for refrigerating overload protection of fixed-frequency air conditioner and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114893884A CN114893884A (en) | 2022-08-12 |
| CN114893884B true CN114893884B (en) | 2023-10-03 |
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