CN114688683B - Air conditioner and defrosting control method thereof - Google Patents
Air conditioner and defrosting control method thereof Download PDFInfo
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- CN114688683B CN114688683B CN202210254088.4A CN202210254088A CN114688683B CN 114688683 B CN114688683 B CN 114688683B CN 202210254088 A CN202210254088 A CN 202210254088A CN 114688683 B CN114688683 B CN 114688683B
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- 238000010257 thawing Methods 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
Classifications
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, and aims to solve the problems that the defrosting start control method of the existing air conditioner is unreasonable and frost is not removed or frost-free defrosting is frequently generated. Obtaining the distance between the distance measuring device and the surface of the indoor heat exchanger during refrigeration; selectively controlling the air conditioner to enter a defrosting mode according to the distance, and entering a first defrosting mode if the distance is smaller than a first preset distance; if the distance is larger than or equal to the first preset distance and smaller than the second preset distance, acquiring the air outlet temperature at the air outlet; if the air outlet temperature is smaller than the first preset temperature and larger than or equal to the second preset temperature, entering a second defrosting mode; if the air outlet temperature is smaller than the second preset temperature, entering a third defrosting mode, and pertinently defrosting according to the frosting thickness and the air outlet temperature, so that the defrosting starting control method is more reasonable.
Description
Technical Field
The invention relates to the technical field of air conditioners, and particularly provides an air conditioner and a defrosting control method thereof.
Background
In general, when the outdoor ambient temperature is high, the air conditioner is controlled to operate in a cooling mode so as to deliver cool air into the room to reduce the indoor temperature. In the existing air conditioner, under the refrigeration mode, the situation that moisture in the air is condensed on the evaporator to form frost occurs, and the frost further hinders the circulation of the air to form ice, so that the refrigeration effect is easily affected when the evaporator is frosted. The existing scheme is to reduce the frequency of the compressor according to the detected temperature on the evaporator coil so that the temperature of the evaporator is not too low (freezing protection), namely, when the temperature of the evaporator is lower than zero, the compressor is turned off, so that the operation of the compressor is stopped until the frost on the surface of the evaporator is removed, and then the refrigeration is restarted. However, the defrosting start control method is unreasonable, and the situation that frost is not removed or frost-free defrosting often occurs, for example, in practical application, an evaporator often freezes, but the temperature detected by a sensor is 7 ℃, and the freezing protection condition is not achieved, so that the refrigerating effect of the air conditioner is affected, and the use experience of a user is reduced.
Accordingly, there is a need in the art for a new solution to the problems of the prior art.
Disclosure of Invention
The invention aims to solve the technical problems that the defrosting starting control method of the existing air conditioner is unreasonable, and the problem that the existing frost is not removed or frost-free defrosting is often caused.
The invention provides a defrosting control method of an air conditioner, the air conditioner comprises an indoor heat exchanger and an air outlet for guiding air flow flowing through the indoor heat exchanger into a room, a distance measuring device is arranged at the air outlet, the distance measuring device is used for detecting the distance between the air outlet and the position, opposite to the distance measuring device, on the surface of the indoor heat exchanger, the control method comprises the following steps:
Acquiring the distance between the ranging device and the position, facing the ranging device, on the surface of the indoor heat exchanger when the air conditioner is in a refrigerating mode;
and selectively controlling the air conditioner to enter a defrosting mode according to the distance.
According to the defrosting control method, when the air conditioner is in the refrigerating mode, in order to judge whether a frost layer exists on the indoor heat exchanger and whether the frost layer needs to be defrosted or not more accurately, the distance measuring device is arranged at the air outlet and used for detecting the distance between the distance measuring device and the position, which is opposite to the distance measuring device, on the surface of the indoor heat exchanger, of the air conditioner, so that whether the indoor heat exchanger of the air conditioner frosts or not and the frosting thickness of the air conditioner are reliably estimated according to the detected distance, the air conditioner is selectively controlled to enter the defrosting mode, whether the air conditioner frosts or not is judged only by detecting the temperature of the air outlet is avoided, the air conditioner can defrost timely and effectively, meanwhile, the defrosting starting control method of the air conditioner is more reasonable, the situation that the air conditioner frosts are not removed or frostless defrosted can be avoided, the refrigerating effect of the air conditioner is improved, and the use experience and comfort of a user are remarkably improved.
In the above preferred technical solution of the control method, the step of "selectively controlling the air conditioner to enter the defrosting mode according to the distance" includes:
and if the distance is smaller than a first preset distance, controlling the air conditioner to enter a first defrosting mode.
By the defrosting control method, the detected distance between the distance measuring device and the position, opposite to the distance measuring device, on the surface of the indoor heat exchanger is compared with the first preset distance, if the distance is smaller than the first preset distance, the fact that a frost layer exists on the surface of the indoor heat exchanger is indicated, and then the air conditioner is controlled to enter a first defrosting mode.
In the above preferred technical solution of the control method, the step of "selectively controlling the air conditioner to enter the defrosting mode according to the distance" includes:
If the distance is larger than or equal to the first preset distance and smaller than the second preset distance, acquiring the air outlet temperature at the air outlet;
and selectively controlling the air conditioner to enter a defrosting mode according to the air outlet temperature.
Through the defrosting control method, if the detected distance between the ranging device and the position, which is opposite to the ranging device, on the surface of the indoor heat exchanger is larger than or equal to the first preset distance and smaller than the second preset distance, then the situation that the distance between the ranging device and the surface of the indoor heat exchanger is larger than or equal to the first preset distance is indicated, the air outlet temperature at the air outlet is further obtained, whether the obstacle is a frost layer or not is judged according to the air outlet temperature, the air conditioner is further selectively controlled to enter a defrosting mode based on the air outlet temperature, the situation that the air conditioner misjudges dust as the frost layer and performs defrosting is avoided, the phenomenon that the air conditioner does not have frost and defrosting is caused is avoided, the air outlet temperature at the air outlet is comprehensively analyzed while the distance between the surface of the indoor heat exchanger and the ranging device is detected, whether the air conditioner frosts and the frosts degree are judged, and the rationality and the accuracy of the defrosting starting control method of the air conditioner are further improved.
In the above preferred technical solution of the control method, the step of selectively controlling the air conditioner to enter the defrosting mode according to the outlet air temperature includes:
and if the air outlet temperature is smaller than the first preset temperature, controlling the air conditioner to enter a defrosting mode.
By the defrosting control method, the acquired air outlet temperature at the air outlet is compared with the first preset temperature, if the air outlet temperature is smaller than the first preset temperature, the obstacle on the indoor heat exchanger is indicated to be a frost layer, so that defrosting time is accurately determined, and the air conditioner is controlled to enter a defrosting mode.
In the above preferred technical solution of the control method, the step of selectively controlling the air conditioner to enter the defrosting mode according to the outlet air temperature includes:
and if the air outlet temperature is not less than the first preset temperature, controlling the air conditioner to enter a self-cleaning mode.
By the defrosting control method, the acquired air outlet temperature at the air outlet is compared with the first preset temperature, if the air outlet temperature is not less than the first preset temperature, the air outlet temperature indicates that the obstacle on the indoor heat exchanger is dust, and then the air conditioner is controlled to enter a self-cleaning mode, so that the air conditioner is prevented from misjudging the dust as a frost layer to defrost, the condition of wasting energy is caused, and the defrosting control and the self-cleaning control intellectualization of the air conditioner are improved.
In the above preferred technical solution of the control method, the step of controlling the air conditioner to enter the defrosting mode if the outlet air temperature is less than a first preset temperature includes:
If the air outlet temperature is smaller than the first preset temperature and is larger than or equal to the second preset temperature, controlling the air conditioner to enter a second defrosting mode;
And if the air outlet temperature is smaller than the second preset temperature, controlling the air conditioner to enter a third defrosting mode.
By the defrosting control method, the acquired air outlet temperature at the air outlet is compared with the first preset temperature and the second preset temperature, and the air conditioner is selectively controlled to enter the second defrosting mode or the third defrosting mode according to different comparison results, so that the air conditioner can select the defrosting mode corresponding to the frosting degree according to the frosting degree and control the air conditioner to defrost, intelligent defrosting can be performed by the air conditioner according to the actual frosting degree of the indoor heat exchanger, defrosting times and redundant defrosting consumption are reduced, and user experience is improved.
In the above preferred technical solution of the control method, the first defrosting mode includes controlling a compressor and an external fan of the air conditioner to stop, and controlling an internal fan of the air conditioner to operate at a first rotational speed;
the second defrosting mode comprises the steps of controlling a compressor and an external fan of the air conditioner to stop, and controlling an internal fan of the air conditioner to operate according to a second rotating speed;
The third defrosting mode comprises the steps of controlling a compressor and an external fan of the air conditioner to stop, and controlling an internal fan of the air conditioner to operate according to a third rotating speed;
Wherein the third rotational speed is greater than the second rotational speed and less than the first rotational speed.
By the defrosting control method, when the air conditioner is defrosted, the compressor and the outer fan of the air conditioner are controlled to stop, the indoor heat exchanger can be prevented from continuously frosting, the inner fan of the air conditioner is controlled to blow frost on the surface of the indoor heat exchanger according to the preset rotating speed, the frost layer on the surface of the indoor heat exchanger is enabled to be melted under the action of wind power of the inner fan in an accelerating mode, the inner fan can blow part of cold air into the room by utilizing low temperature of the frost layer, the air conditioner can achieve a certain refrigerating effect when defrosting, the air conditioner can judge the frosting degree of the indoor heat exchanger according to the detected distance between the ranging device and the position, which is opposite to the ranging device, on the surface of the indoor heat exchanger and the air outlet temperature of the air outlet, and the inner fan is controlled to operate according to different rotating speeds according to different frosting degrees, so that the air conditioner can defrost pertinently, and the intelligent air conditioner is further improved.
In the above preferred technical solution of the control method, after the first preset duration of the defrosting mode of the air conditioner is operated, the air conditioner is controlled to exit the defrosting mode.
In a preferred embodiment of the above control method, the distance measuring device is an infrared distance sensor.
In another aspect, the present invention also provides an air conditioner, the air conditioner including a memory and a processor, the memory storing a computer program configured to be executed by the processor to implement the defrosting control method of the air conditioner in the above technical scheme.
It should be noted that the air conditioner has all the technical effects of the defrosting control method of the air conditioner, and will not be described herein.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a flowchart of a defrosting control method of an air conditioner of the present invention;
Fig. 2 is a flowchart of a defrost control method of an air conditioner in one embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
The invention provides an air conditioner and a defrosting control method thereof, which aim to more accurately judge whether a frost layer exists on an indoor heat exchanger and whether the frost layer reaches the degree of defrosting needs or not, and selectively control the air conditioner to enter a defrosting mode, so that the air conditioner can defrost timely and effectively, and meanwhile, the defrosting start control method of the air conditioner is more reasonable, the situation that the air conditioner does not remove frost or does not defrost can be avoided, and the use experience and comfort of a user are obviously improved.
The defrosting control method of the air conditioner of the present invention will be described in detail with reference to fig. 1 and 2. Wherein, FIG. 1 is a flowchart of a defrosting control method of an air conditioner of the present invention; fig. 2 is a flowchart of a defrost control method of an air conditioner in one embodiment of the present invention.
The air conditioner mainly comprises an air conditioner outdoor unit and an air conditioner indoor unit, wherein the air conditioner outdoor unit is provided with a compressor and an outer fan, the air conditioner indoor unit comprises an indoor heat exchanger and an inner fan, the air conditioner indoor unit also comprises an air outlet for guiding air flow flowing through the indoor heat exchanger into a room, and the air flow enters the indoor unit under the driving of the inner fan and is blown out through the air outlet after being cooled by the indoor heat exchanger. The air outlet is provided with a distance measuring device which is used for detecting the distance between the air outlet and the position, opposite to the distance measuring device, on the surface of the indoor heat exchanger. The air conditioner includes a memory and a processor. The air conditioner of the invention can be a split type air conditioner or an integrated type air conditioner.
Specifically, as shown in fig. 1, the defrosting control method of the present invention includes the steps of:
step S10: when the air conditioner is in a refrigerating mode, acquiring the distance between the distance measuring device and the position, opposite to the distance measuring device, on the surface of the indoor heat exchanger;
In step S10, the indoor heat exchanger is a fin coil heat exchanger, including a plurality of fins sleeved on the hairpin tube, the ranging device may be a laser ranging sensor or an infrared ranging sensor, and the like, and since the temperature at the air outlet is lowest, the fins at the air outlet are most prone to frosting, so that the ranging device is arranged on the fins close to the air outlet, the distance between the position of the fins opposite to the ranging device and the ranging device can be detected, and whether a frost layer exists on the fins is judged through the distance.
Step S11: if the distance is smaller than the first preset distance, controlling the air conditioner to enter a first defrosting mode;
In step S11, the first preset distance may be set within a range of 0.5 to 1mm, and when the distance is smaller than the first preset distance, it indicates that frosting on the fins is serious, thereby controlling the air conditioner to perform the first defrosting mode.
The first defrosting mode is specifically to control the compressor and the external fan of the air conditioner to stop and control the internal fan of the air conditioner to run at a first rotating speed, which can be set to 1100-1200 rpm.
Step S12: if the distance is greater than or equal to the first preset distance and smaller than the second preset distance, acquiring the air outlet temperature at the air outlet;
In step S12, at least one temperature sensor for detecting the temperature of the fins is disposed at the air outlet of the indoor heat exchanger, the second preset distance may be set within a range of 1-1.5 mm, and when the distance is greater than or equal to the first preset distance and less than the second preset distance, it is unable to determine whether the obstacle on the fins is a frost layer or dust, and further obtain the air outlet temperature at the air outlet through the temperature sensor for subsequent determination.
Step S121: if the air outlet temperature is smaller than the first preset temperature and is larger than or equal to the second preset temperature, controlling the air conditioner to enter a second defrosting mode;
In step S121, the first preset temperature may be set within a range of 0-5 ℃, and when the air outlet temperature is less than the first preset temperature, the temperature on the current fin on the surface is lower, so that it can be determined that frost is being formed on the current fin, and the air conditioner is further controlled to enter a defrosting mode.
The second preset temperature may be set within a range of-5 to 0 ℃, when the air outlet temperature is less than the first preset temperature and greater than or equal to the second preset temperature, the temperature on the current fin is indicated to be lower, thereby judging that frosting is occurring on the current fin, controlling the air conditioner to enter a second defrosting mode, i.e., controlling the compressor and the outer fan of the air conditioner to stop, and controlling the inner fan of the air conditioner to operate at a second rotational speed, which may be set to 800 to 900rpm.
The climate temperature is quite different in different areas, especially the temperature difference in summer is quite large in the north and south, and the day and night temperature difference is quite large, for example, the average temperature is not higher than 30 ℃ in the outside of summer in some south areas, and the average temperature is close to 40 ℃ in the outside of summer in some north areas.
In view of this, the invention distinguishes according to the refrigerating season's environment in the area where the air conditioner is located, can give the appropriate first preset temperature to the ambient temperature in different areas, improve the judgement accuracy to defrosting opportunity.
Step S122: if the air outlet temperature is smaller than the second preset temperature, controlling the air conditioner to enter a third defrosting mode;
In step S122, when the air outlet temperature is less than the second preset temperature, it indicates that the temperature on the current fin is low, and the frosting situation on the current fin is serious, and the air conditioner is controlled to enter a third defrosting mode, i.e. the compressor and the external fan of the air conditioner are controlled to stop, and the internal fan of the air conditioner is controlled to operate according to the third rotation speed.
The third rotation speed may be set to 900 to 1100rpm.
Step S123: if the air outlet temperature is not less than the first preset temperature, controlling the air conditioner to enter a self-cleaning mode;
in step S123, when the temperature of the air outlet is greater than or equal to the first preset temperature, it indicates that the current fin has an obstacle, but the temperature of the fin is not reduced, so as to determine that the obstacle on the current fin is dust, and control the air conditioner to execute the self-cleaning mode.
Step S20: and after the air conditioner operates in the defrosting mode for a first preset time, controlling the air conditioner to exit the defrosting mode.
In step S20, the first preset duration is a preset value of the system, which may be any value in the range of 10 to 60 minutes. If the compressor and the external fan are closed for a long time, only the internal fan is opened, so that the indoor environment temperature is higher, and the use experience of a user is influenced. Therefore, the defrosting mode operation time period of the air conditioner can be adjusted to a fixed value according to the actual usage habit, for example, the first preset time period can be set to 20 minutes, 30 minutes, or the like.
In the step S20, the operation duration of the defrosting mode may be controlled differently according to the specific frosting degree, for example, in a possible embodiment, when the current defrosting mode is the first defrosting mode, the inner fan may be controlled to operate at the first rotational speed for 30 minutes; when the current defrosting mode is the second defrosting mode, the inner fan can be controlled to run for 10 minutes at the second rotating speed; when the current defrosting mode is the third defrosting mode, the inner fan can be controlled to run for 20 minutes at the third rotating speed.
After the operation of step S20 is finished, the distance between the fins at the air outlet and the distance measuring device can be detected again by using the distance measuring device, so as to judge whether the frost layer on the indoor heat exchanger is completely removed, and avoid the phenomenon that the frost on the indoor heat exchanger is not completely removed and the air conditioner exits the defrosting mode.
According to the defrosting control method of the air conditioner, when the air conditioner is in the refrigerating mode, the distance between the distance measuring device and the position, opposite to the distance measuring device, on the surface of the indoor heat exchanger can be detected by the distance measuring device arranged at the air outlet, so that whether frosting and frosting thickness on the fins at the air outlet are reliably estimated according to the detected distance.
If the distance exceeds the first preset distance, which indicates that the frost layer is thick, judging that the frost is seriously formed on the fins at the air outlet, and directly controlling the air conditioner to execute a first defrosting mode without acquiring the temperature of the fins;
if the distance is greater than or equal to the first preset distance and smaller than the second preset distance, acquiring the current fin temperature, and when the fin temperature is greater than or equal to the first preset temperature and greater than or equal to the second preset temperature, judging that frosting on the fins at the air outlet is not serious, and that a frost layer is not thick, and controlling the air conditioner to execute a second defrosting mode;
And if the current fin temperature is smaller than the second preset temperature, which indicates that the current fin frosts seriously, controlling the air conditioner to enter a third defrosting mode. The air conditioner can be judged based on the surface condition of the current indoor heat exchanger and the temperature of the fins at the air outlet, so that the defrosting start control method is more reasonable, and the air conditioner can defrost timely and effectively.
In a possible implementation manner, the defrosting control method of the air conditioner may be further adjusted to only detect a distance between the ranging device and a position on the surface of the indoor heat exchanger, where the position is opposite to the ranging device, selectively control the air conditioner to enter a defrosting mode according to the distance, and if the distance is smaller than a first preset distance, control the air conditioner to enter the first defrosting mode; if the distance is not smaller than the first preset distance, the fact that the current indoor heat exchanger is not frosted or the frosting degree is not serious is indicated, and defrosting can be not performed.
The operation duration of the defrost mode may be determined according to the frosting degree and the defrosting condition of the air conditioner.
In one embodiment, the distance measuring device adopts an infrared distance sensor, the infrared distance sensor is fixed on the fin at the air outlet, and the infrared distance sensor can detect frosting on the surface of the fin at the air outlet.
Specifically, as shown in fig. 2, the defrosting control method of the present invention includes the steps of:
Step S10: when the air conditioner is in a refrigerating mode, acquiring the distance between the infrared distance sensor and the fins at the air outlet;
Step S11: if the distance is less than 1mm, controlling the air conditioner to enter a first defrosting mode;
In step S11, a first defrosting mode is entered, that is, the compressor and the external fan of the air conditioner are controlled to stop, and the internal fan of the air conditioner is controlled to operate at 1200rpm, that is, when the frost layer is thicker, the distance between the infrared distance sensor and the fins at the air outlet is smaller than 1mm, the current frosting degree is judged to be serious frosting, and when the first defrosting mode is operated, the air conditioner stops refrigerating for a period of time, and the purpose of defrosting is achieved by using the high-speed rotation of the indoor unit of the air conditioner.
Step S12: if the distance is more than or equal to 1mm and less than 1.5mm, acquiring the air outlet temperature at the air outlet;
Specifically, a temperature sensor is arranged on the fin at the air outlet and is used for detecting the real-time temperature of the fin at the air outlet.
The temperature sensor can continuously detect the temperature of the fins at the current air outlet, and the detected temperatures are sent to a memory of the air conditioner for further calculation and processing, and the final current temperature of the fins is the average value or the lowest value of the temperatures detected by the temperature sensor.
The outlet air temperature in the step S12 is the lowest value of the plurality of current fin temperatures.
Step S121: if the temperature of the air outlet is less than 3 ℃ and greater than or equal to 0 ℃, controlling the air conditioner to enter a second defrosting mode;
In step S121, 3 ℃ and 0 ℃ are only exemplary, and do not limit the protection scope of the present invention, and in practical application, the user may flexibly set according to different defrosting requirements. When the air outlet temperature is less than 3 ℃ and greater than or equal to 0 ℃, judging that the current frosting degree is primary frosting, controlling the air conditioner to enter a second defrosting mode, namely controlling the compressor and the outer fan of the air conditioner to stop, and controlling the inner fan of the air conditioner to operate according to 800 rpm;
step S122: if the temperature of the air outlet is less than 0 ℃, controlling the air conditioner to enter a third defrosting mode;
In step S122, when the air outlet temperature is less than 0 ℃, judging that the current frosting degree is medium frosting, controlling the air conditioner to enter a third defrosting mode, namely controlling the compressor and the external fan of the air conditioner to stop, and controlling the internal fan of the air conditioner to operate according to 1000 rpm;
step S123: if the temperature of the air outlet is not less than 3 ℃, controlling the air conditioner to enter a self-cleaning mode;
Step S20: and after the air conditioner operates in the defrosting mode for 30 minutes, controlling the air conditioner to exit the defrosting mode.
In summary, the defrosting control method of the air conditioner disclosed by the invention comprehensively judges whether the air conditioner executes the defrosting mode or not by measuring the distance between the indoor heat exchanger and the distance measuring device and acquiring the air outlet temperature at the air outlet, and not only judges whether the air conditioner frosts or not by detecting the air outlet temperature at the air outlet, but also can accurately judge the time when the air conditioner enters the defrosting mode, thereby avoiding the occurrence of the condition that frost is not removed or frost is not removed as much as possible, and ensuring the timeliness and the effectiveness of the defrosting of the air conditioner.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (10)
1. A defrosting control method for an air conditioner is characterized in that the air conditioner comprises an indoor heat exchanger and an air outlet for guiding air flow flowing through the indoor heat exchanger into a room, a distance measuring device is arranged at the air outlet and used for detecting the distance between the air outlet and the position, opposite to the distance measuring device, on the surface of the indoor heat exchanger,
The control method comprises the following steps:
Acquiring the distance between the ranging device and the position, facing the ranging device, on the surface of the indoor heat exchanger when the air conditioner is in a refrigerating mode;
and selectively controlling the air conditioner to enter a defrosting mode according to the distance.
2. The defrosting control method as set forth in claim 1, wherein the step of selectively controlling the air conditioner to enter a defrosting mode according to the distance includes:
and if the distance is smaller than a first preset distance, controlling the air conditioner to enter a first defrosting mode.
3. The defrosting control method as set forth in claim 2, wherein the step of selectively controlling the air conditioner to enter a defrosting mode according to the distance includes:
If the distance is larger than or equal to the first preset distance and smaller than the second preset distance, acquiring the air outlet temperature at the air outlet;
and selectively controlling the air conditioner to enter a defrosting mode according to the air outlet temperature.
4. The defrosting control method as set forth in claim 3, wherein the step of selectively controlling the air conditioner to enter a defrosting mode according to the outlet air temperature includes:
and if the air outlet temperature is smaller than the first preset temperature, controlling the air conditioner to enter a defrosting mode.
5. The defrosting control method as set forth in claim 4, wherein the step of selectively controlling the air conditioner to enter a defrosting mode according to the outlet air temperature includes:
and if the air outlet temperature is not less than the first preset temperature, controlling the air conditioner to enter a self-cleaning mode.
6. The defrosting control method as set forth in claim 4, wherein the step of controlling the air conditioner to enter the defrosting mode if the outlet air temperature is less than a first preset temperature includes:
If the air outlet temperature is smaller than the first preset temperature and is larger than or equal to the second preset temperature, controlling the air conditioner to enter a second defrosting mode;
And if the air outlet temperature is smaller than the second preset temperature, controlling the air conditioner to enter a third defrosting mode.
7. The defrost control method of claim 6, wherein the first defrost mode comprises controlling a compressor and an external fan of the air conditioner to be stopped and controlling an internal fan of the air conditioner to operate at a first rotational speed;
the second defrosting mode comprises the steps of controlling a compressor and an external fan of the air conditioner to stop, and controlling an internal fan of the air conditioner to operate according to a second rotating speed;
The third defrosting mode comprises the steps of controlling a compressor and an external fan of the air conditioner to stop, and controlling an internal fan of the air conditioner to operate according to a third rotating speed;
Wherein the third rotational speed is greater than the second rotational speed and less than the first rotational speed.
8. The defrosting control method according to any one of claims 2 to 7, characterized in that the air conditioner is controlled to exit the defrosting mode after a first preset period of time for the air conditioner to operate in the defrosting mode.
9. The defrosting control method according to any one of claims 1 to 7, characterized in that the distance measuring device is an infrared distance sensor.
10. An air conditioner characterized by comprising a memory and a processor, the memory storing a computer program configured to be executed by the processor to implement the defrosting control method of an air conditioner according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210254088.4A CN114688683B (en) | 2022-03-15 | 2022-03-15 | Air conditioner and defrosting control method thereof |
| PCT/CN2022/132738 WO2023173788A1 (en) | 2022-03-15 | 2022-11-18 | Air conditioner and defrosting control method thereof |
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| CN202210254088.4A CN114688683B (en) | 2022-03-15 | 2022-03-15 | Air conditioner and defrosting control method thereof |
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| CN114688683B (en) * | 2022-03-15 | 2024-05-24 | 青岛海尔空调器有限总公司 | Air conditioner and defrosting control method thereof |
| CN115654661A (en) * | 2022-08-19 | 2023-01-31 | 珠海格力电器股份有限公司 | Air conditioner anti-freezing control method and air conditioner |
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| CN114688683A (en) | 2022-07-01 |
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