CN112013502B - Defrosting method of air conditioner heat exchanger and air conditioner - Google Patents
Defrosting method of air conditioner heat exchanger and air conditioner Download PDFInfo
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- CN112013502B CN112013502B CN201910464215.1A CN201910464215A CN112013502B CN 112013502 B CN112013502 B CN 112013502B CN 201910464215 A CN201910464215 A CN 201910464215A CN 112013502 B CN112013502 B CN 112013502B
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor 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
- F24F11/30—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
- 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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Abstract
The invention discloses a defrosting method of an air conditioner heat exchanger and an air conditioner, wherein the method comprises the following steps: detecting a first rotating speed of an impeller of an air conditioner external unit; calculating a first change value of the first rotating speed and the initial rotating speed; and when the first change value meets a first preset condition, controlling the air conditioner to switch to a defrosting mode to defrost. According to the invention, the first rotating speed of the impeller of the air conditioner external unit is obtained, the first rotating speed and the first change value of the initial rotating speed are obtained, the thickness change value of the frost layer on the surface of the heat exchanger can be determined according to the first change value, and whether the defrosting mode needs to be started or not is determined according to the thickness change value, so that the defrosting accuracy is improved, the defrosting misoperation is avoided, and the reduction of the heating capacity of the air conditioner and the energy waste caused by the defrosting misoperation are avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting method of an air conditioner heat exchanger and an air conditioner.
Background
When the air conditioner operates in the heating mode, the outdoor heat exchanger of the air conditioner absorbs heat in air to reduce the surface temperature of the outdoor heat exchanger, so that the surface of the outdoor heat exchanger is frosted. And along with the continuous operation of the air conditioner, the thickness of the frost layer on the surface of the outdoor heat exchanger can be gradually increased, so that the heat exchange efficiency of the outdoor heat exchanger is influenced. Therefore, after the air conditioner operates in the heating mode for a certain period of time, it is necessary to defrost the outdoor heat exchanger.
The existing defrosting method of the air conditioner generally adopts a temperature-time method, namely a temperature sensor is arranged on an outdoor heat exchanger, and when the surface temperature of the heat exchanger detected by the temperature sensor is lower than a set value and the running time of the air conditioner in a heating mode reaches a preset time, the defrosting operation is started. However, the frosting speed of the outdoor heat exchanger is influenced by various factors such as the surface temperature of the heat exchanger, the relative humidity of outdoor air, the wind speed and the like, so that the frosting severity of the outdoor heat exchanger cannot be accurately judged by the air conditioner, the problems of frosting absence, early or delayed frosting and the like occur, the heating capacity of the air conditioner is reduced, and energy waste is caused.
Disclosure of Invention
The invention provides a defrosting method of an air conditioner heat exchanger and an air conditioner, aiming at overcoming the defects of the prior art and solving the problems of reduced heating capacity and energy waste of the air conditioner caused by the defrosting method of the prior air conditioner heat exchanger.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a defrosting method of an air conditioner heat exchanger is applied to the heating operation process of an air conditioner and comprises the following steps:
acquiring an initial rotating speed of an impeller of an air conditioner external unit, and detecting a first rotating speed of the impeller of the air conditioner external unit;
Calculating a first variation value of the first rotating speed and the initial rotating speed;
and when the first change value meets a first preset condition, controlling the air conditioner to switch to a defrosting mode to defrost.
The defrosting method of the air conditioner heat exchanger comprises the following steps of obtaining the initial rotating speed of an impeller of an air conditioner outer unit, and detecting the first rotating speed of the impeller of the air conditioner outer unit:
detecting the environment temperature of the environment where the air conditioner outdoor unit is located, and judging whether the environment temperature is in a preset temperature range or not;
and when the environment temperature is in the preset temperature range, acquiring the initial rotating speed of the impeller of the air conditioner outer unit, and detecting the first rotating speed of the impeller of the air conditioner outer unit.
The defrosting method of the air conditioner heat exchanger includes the steps of obtaining an initial rotating speed of an air conditioner outer unit impeller when the environment temperature is within the preset temperature range, and detecting a first rotating speed of the air conditioner outer unit impeller specifically includes:
when the ambient temperature is in the preset temperature interval, monitoring a first duration that the ambient temperature is continuously in the preset temperature interval;
when the first time reaches a first preset time, acquiring a second rotating speed of the impeller of the air conditioner external unit;
And taking the second rotating speed as the initial rotating speed, and detecting the first rotating speed of the impeller of the air conditioner external unit.
The defrosting method of the air conditioner heat exchanger comprises the following steps of obtaining an initial rotating speed of an impeller of an air conditioner outer unit and detecting a first rotating speed of the impeller of the air conditioner outer unit:
acquiring a set temperature of the air conditioner, and determining a rotating speed corresponding to the set temperature;
and taking the rotating speed corresponding to the set temperature as the initial rotating speed, and detecting the first rotating speed of the impeller of the air conditioner external unit.
The defrosting method of the air conditioner heat exchanger, wherein when the first change value meets a first preset condition, the air conditioner is controlled to be switched to a defrosting mode to defrost, and the defrosting method specifically includes the following steps:
when the first change value meets a first preset condition, monitoring a second duration when the first change value continuously meets the first preset condition;
and when the second time length reaches a second preset time length, controlling the air conditioner to enter a defrosting mode.
The defrosting method of the air conditioner heat exchanger is characterized in that when the first change value meets a first preset condition, the method further comprises the following steps of controlling the air conditioner to be switched to a defrosting mode to defrost the air conditioner, wherein the defrosting method further comprises the following steps:
Detecting a third rotating speed of the impeller of the air conditioner external unit, and calculating a second change value of the third rotating speed and the initial speed;
when the second change value meets a second preset condition, monitoring a third duration when the second change value continuously meets the second preset condition;
and when the third time length reaches a third preset time length, controlling the air conditioner to exit the defrosting mode.
According to the defrosting method of the air conditioner heat exchanger, a rotating speed sensor is arranged on an air conditioner outer unit blade, and the rotating speed of the air conditioner outer unit blade is detected through the rotating speed sensor.
The defrosting method of the air conditioner heat exchanger comprises the following steps:
and when the first rotating speed is not detected within the preset time, prompting a user that the air conditioner breaks down.
An air conditioner, comprising: the device comprises a processor, a memory and a communication bus, wherein the memory is stored with a computer readable program which can be executed by the processor;
the communication bus realizes connection communication between the processor and the memory;
the processor, when executing the computer readable program, implements the steps of the defrosting method for an air conditioner heat exchanger as described in any one of the above.
The air conditioner further comprises a rotating speed sensor, the rotating speed sensor is arranged on the impeller of the air conditioner outer unit and communicated with the processor, and the rotating speed sensor transmits the detected rotating speed of the impeller of the air conditioner outer unit to the processor.
Has the advantages that: compared with the prior art, the invention provides a defrosting method of an air conditioner heat exchanger and an air conditioner, wherein the method is applied to the heating process of the air conditioner and specifically comprises the steps of detecting a first rotating speed of an impeller of an outer unit of the air conditioner; calculating a first change value of the first rotating speed and the initial rotating speed; and when the first change value meets a first preset condition, controlling the air conditioner to switch to a defrosting mode to defrost. According to the invention, the first rotating speed of the impeller of the air conditioner external unit is obtained, the first rotating speed and the first change value of the initial rotating speed are obtained, the thickness change value of the frost layer on the surface of the heat exchanger can be determined according to the first change value, and whether the defrosting mode needs to be started or not is determined according to the thickness change value, so that the defrosting accuracy is improved, the defrosting misoperation is avoided, and the reduction of the heating capacity of the air conditioner and the energy waste caused by the defrosting misoperation are avoided.
Drawings
FIG. 1 is a flow chart of a defrosting method for an air conditioner heat exchanger according to the present invention;
FIG. 2 is another flow chart of the defrosting method of the heat exchanger of the air conditioner provided by the invention;
FIG. 3 is a schematic diagram of an air conditioner to which the defrosting method of the heat exchanger of the air conditioner according to the present invention is applied;
FIG. 4 is a schematic structural diagram of an air conditioner to which the defrosting method of the heat exchanger of the air conditioner according to the present invention is applied;
fig. 5 is a flowchart illustrating an embodiment of step S10 in a defrosting method for an air conditioner heat exchanger according to the present invention;
fig. 6 is a flowchart illustrating another embodiment of step S10 in the defrosting method of the heat exchanger of the air conditioner according to the present invention;
fig. 7 is a flowchart of step S30 in the defrosting method of the air conditioner heat exchanger according to the present invention;
fig. 8 is a schematic structural diagram of an air conditioner according to the present invention.
Detailed Description
The invention provides a defrosting method of an air conditioner heat exchanger and an air conditioner, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and 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.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The invention will be further explained by the description of the embodiments in conjunction with the drawings.
The embodiment provides a defrosting method of an air conditioner heat exchanger, which is applied to the heating operation process of an air conditioner, and as shown in fig. 1 and 2, the method comprises the following steps:
s10, obtaining the initial rotating speed of the impeller of the air conditioner outer unit, and detecting the first rotating speed of the impeller of the air conditioner outer unit.
Specifically, when the air conditioner is operated for heating, the liquid refrigerant in the outdoor heat exchanger absorbs heat of outdoor air when evaporating in the outdoor heat exchanger, so that the surface temperature of the outdoor heat exchanger is reduced, and when the surface temperature of the outdoor heat exchanger is lower than zero, the surface of the outdoor heat exchanger is frosted. When the surface of the outdoor heat exchanger frosts, the frost layer can reduce the heat exchange efficiency of the liquid refrigerant in the outdoor heat exchanger, thereby influencing the heating efficiency of the air conditioner. Therefore, after the surface of the heat exchanger of the air conditioner external unit is frosted, the defrosting mode needs to be started to remove the frost layer on the surface of the heat exchanger externally connected with the air conditioner.
In addition, the thickness of frost layer formed on the surface of the outdoor unit heat exchanger of the air conditioner is increased as the continuous operation time of the air conditioner is increased. The frost layer on the outer surface of the air conditioner heat exchanger causes the outdoor pressure of the outdoor fan chamber to be greater than the indoor pressure, thereby forming a pressure difference, and the pressure difference increases with the thickness of the frost layer. Meanwhile, the pressure difference enables the rotating speed of the impeller of the air conditioner external unit to change, when the pressure difference is increased, the rotating speed of the impeller of the air conditioner external unit is correspondingly increased, and the rotating speed of the impeller of the air conditioner external unit is larger than that of the impeller of the air conditioner external unit when the impeller is not frosted; when the pressure difference is reduced, the rotating speed of the outdoor unit impeller is reduced, so that the rotating speed of the external impeller of the air conditioner is gradually close to the rotating speed when frost is not formed. Therefore, the change of the frost layer thickness of the outdoor heat exchanger of the air conditioner can be determined according to the change of the rotating speed of the impeller of the outdoor unit of the air conditioner. Therefore, during the heating operation of the air conditioner, the first rotating speed of the impeller of the outer unit of the air conditioner can be detected, so that the thickness of the frost layer can be determined according to the first variation of the first rotating speed and the initial rotating speed. Preferably, in an embodiment of the present invention, the outdoor heat exchanger may be a finned heat exchanger, and during a heating operation of the finned heat exchanger, frost layers on the finned heat exchanger block air flow between fins of the heat exchanger, so that a pressure difference between an inside and an outside of a fan chamber of the outdoor unit changes, which causes a rotation speed of an impeller to change.
Meanwhile, in this embodiment, the air conditioner may be a heat pump type air conditioner, and when the air conditioner is in a heating mode, the air conditioner detects a first rotation speed of an impeller of an external unit of the air conditioner, which is configured by the air conditioner. In addition, when the air conditioner is in a refrigeration mode, a dehumidification mode or a ventilation mode, liquid refrigerants in outdoor heat exchange of the air conditioner do not need to absorb heat carried by outdoor air, namely, the surface of a heat exchanger of the air conditioner does not have a frosting phenomenon, and the air conditioner does not need to enter a defrosting mode, so that the air conditioner does not need to detect the first rotating speed of an impeller of an outer machine of the air conditioner. And the first rotating speed is the rotating speed of the impeller of the air conditioner external unit at the moment of detection.
Further, in one embodiment, as shown in fig. 3, the air conditioner includes a controller 104, a rotation speed sensor 102, an impeller 101, a temperature sensor 103, a fault indication device 106, and a defrosting system 105, wherein the rotation speed sensor 102 is disposed on the impeller 101, the temperature sensor 103 is disposed on the outdoor heat exchanger, and the rotation speed sensor 102, the temperature sensor 103, the fault indication device 106, and the defrosting system 105 are all connected to the controller. As shown in fig. 4, the impeller 1 of the air conditioner external unit is assembled in a mounting hole formed by a heat exchanger 3, a front panel 4, a middle partition plate 5 and a top cover plate of the air conditioner external unit, when the fan 2 of the air conditioner external unit operates, a pressure difference is formed on two sides of the mounting hole, the impeller 1 rotates under the action of the pressure difference, and the rotation speed sensor and the impeller 1 rotate synchronously and detect a first rotation speed of the impeller.
Further, in an embodiment, as shown in fig. 5, the obtaining an initial rotation speed of an impeller of an air conditioner external unit and detecting a first rotation speed of the impeller of the air conditioner external unit specifically includes:
s11, detecting the environment temperature of the environment where the air conditioner outdoor unit is located, and judging whether the environment temperature is in a preset temperature range;
and S12, when the environment temperature is within the preset temperature range, acquiring the initial rotating speed of the impeller of the air conditioner external unit, and detecting the first rotating speed of the impeller of the air conditioner external unit.
Specifically, the ambient temperature may be obtained by the temperature sensor 103, that is, the temperature sensor 103 disposed on the air conditioner external unit may be configured to detect the ambient temperature of the environment where the air conditioner external unit is located. After the temperature sensor detects the ambient temperature, the ambient temperature is sent to an air conditioner, the air conditioner receives the ambient temperature and judges whether the ambient temperature is in a preset temperature range or not, and therefore whether a first rotating speed of an impeller of an outer machine of the air conditioner is detected through a rotating speed sensor or not is determined. When the environment temperature is not in the preset temperature interval, the first rotating speed of the impeller of the outer machine of the air conditioner is not detected through the rotating speed sensor, namely, when the environment temperature is not in the preset temperature interval, a defrosting mode is not needed, and the first rotating speed of the impeller of the outer machine of the air conditioner is not needed to be detected. In addition, in the embodiment, the preset temperature range is preferably-25 ℃ to 20 ℃.
Further, in an embodiment, the obtaining an initial rotation speed of an impeller of an air conditioner external unit when the ambient temperature is in the preset temperature range, and detecting the first rotation speed of the impeller of the air conditioner external unit specifically includes:
when the ambient temperature is in the preset temperature interval, monitoring a first duration that the ambient temperature is continuously in the preset temperature interval;
when the first time reaches a first preset time, acquiring a second rotating speed of the impeller of the air conditioner external unit;
and taking the second rotating speed as the initial rotating speed, and detecting the first rotating speed of the impeller of the air conditioner external unit.
Specifically, the initial speed is the rotating speed at the detection moment detected by a rotating speed sensor configured for the air conditioner after the air conditioner is operated for a first preset time period in the heating mode and the environment temperature is within a preset temperature range. The initial speed is detected by a rotating speed sensor on an external impeller of the air conditioner, and when the initial rotating speed is detected, the initial rotating speed is recorded. The first preset time length can be determined by periodically acquiring the rotating speed of the impeller of the air conditioner outdoor unit when the air conditioner operates in a heating mode for the first time and the environment temperature is in a preset temperature range, and the specific process can be that when the air conditioner operates in the heating mode and the environment temperature is in the preset temperature range, the fourth rotating speed of the impeller of the air conditioner outdoor unit is acquired and recorded, the fifth rotating speed of the impeller of the air conditioner outdoor unit is acquired again after the interval set time, and the fifth rotating speed and the fourth rotating speed are compared; if the fifth rotating speed is greater than the fourth rotating speed, acquiring an acquiring moment corresponding to the fourth rotating speed, calculating a time interval between the acquiring moment and an initial moment when the air conditioner is in a heating mode and the environment temperature is in a preset temperature interval, taking the calculated time interval as a first preset duration, and storing the first preset duration; if the fifth rotating speed is equal to the fourth rotating speed, recording the fifth rotating speed and the acquiring time of the fifth rotating speed, and repeating the operation of acquiring the rotating speed of the impeller of the outdoor unit of the air conditioner at intervals of preset time until the fifth rotating speed is greater than the fourth rotating speed; and if the fifth rotating speed is less than the fourth rotating speed, not storing the fifth rotating speed. Therefore, after the air conditioner is operated for the first preset time period under the condition that the air conditioner is in the heating mode and the environment temperature is in the preset temperature range, the impeller of the outer unit of the air conditioner is not frosted, the obtained initial speed is the rotating speed of the impeller of the outer unit of the air conditioner when the impeller of the outer unit of the air conditioner is not frosted, the accuracy of the first change value obtained through calculation according to the initial speed is improved, and the accuracy of the moment when the air conditioner enters the defrosting mode is improved. Certainly, in practical application, when the air conditioner is in the heating mode and the ambient temperature is in the preset temperature range each time, the obtaining process of the first preset time duration is executed, so that the accuracy of the first preset time duration is further improved. Further, in practical applications, the initial speed may be pre-stored.
Further, in an embodiment of the present invention, since the outdoor environment temperature may change during the operation of the air conditioner for the first preset time period, and the time periods for the surfaces of the heat exchangers corresponding to different outdoor environment temperatures to start frosting are different, if the fixed first preset time period is adopted, the rotation speed may be obtained when the initial speed is not the frosting condition of the impeller of the external unit of the air conditioner, so that the time for entering the defrosting mode may be determined inaccurately according to the first rotation speed and the first change value of the initial rotation speed. For example, when the ambient temperature is-15 ℃, the frosting start time of the outer surface of the heat exchanger of the air conditioner is 15 minutes, when the outdoor ambient temperature is-16 ℃, the frosting start time of the outer surface of the heat exchanger of the air conditioner is 10 minutes, and in the process of the air conditioner running for the first preset time, the outdoor ambient temperature is reduced from-15 ℃ to-16 ℃, so that when the air conditioner runs for the first preset time, the obtained initial speed is the rotating speed of the impeller of the outdoor unit of the air conditioner after frosting and is not the rotating speed of the impeller of the outdoor unit of the air conditioner when not frosting. Therefore, when the air conditioner operates in the heating mode and the ambient temperature is within the preset temperature range, the outdoor ambient temperature can be periodically acquired, and when the outdoor ambient temperature acquired in the current period is lower than the outdoor ambient temperature acquired in the previous period, the first preset time length is replaced by the preset time length A corresponding to the outdoor ambient temperature acquired in the current period. Of course, in practical application, before the first preset duration is replaced by the preset duration a corresponding to the outdoor ambient temperature obtained in the current period, it may be determined whether the operation duration of the air conditioner in the heating mode and in the case that the ambient temperature is in the preset temperature range reaches the preset duration a, if so, the initial rotation speed of the impeller is directly obtained, and if not, the first preset duration is replaced by the preset duration a.
Further, in another embodiment, as shown in fig. 6, the acquiring an initial rotation speed of an impeller of an outer unit of an air conditioner and detecting a first rotation speed of the impeller of the outer unit of the air conditioner specifically includes:
s11a, acquiring the set temperature of the air conditioner, and determining the rotating speed corresponding to the set temperature;
and S12a, taking the rotating speed corresponding to the set temperature as the initial rotating speed, and detecting the first rotating speed of the impeller of the air conditioner external unit.
Specifically, the set temperature is a heating temperature of an air conditioner configuration, that is, the set temperature may be a temperature to which heating is required, which is set by a user. And the rotating speeds of the air conditioning fans are different for different set temperatures, and correspondingly, the initial rotating speeds of the air conditioners are different when the air conditioners are not frosted. Therefore, before the first change value of the first rotating speed and the initial rotating speed is calculated, the set temperature of the current configuration of the air conditioner can be obtained, and the corresponding initial rotating speed is determined according to the set temperature, so that the accuracy of the first change value of the first rotating speed and the initial rotating speed can be improved, and the accuracy of defrosting judgment is improved. In this embodiment, the air conditioner may store a corresponding relationship between a set temperature and an initial rotation speed in advance, for example, when the set temperature is 23 ℃, the initial rotation speed is n1, and when the set temperature is 24 ℃, the initial rotation speed is 1.1n1, and the like.
And S20, calculating a first change value of the first rotating speed and the initial rotating speed.
Specifically, the initial speed is a reference for calculating the first variation value, and the initial speed is preferably the rotating speed of the impeller when the air-conditioning heat exchanger is in a heating mode and the air-conditioning heat exchanger is not frosted. The first rotating speed is the rotating speed of the impeller of the air conditioner external unit after the air conditioner heat exchanger operates for a period of time in a heating mode and the environment temperature is in a preset temperature range. The first change value is used for judging the frost layer thickness of the air conditioner heat exchanger, and the first change value is increased along with the increase of the frost layer thickness, namely the first change value and the frost layer thickness are in a linear relation. In this embodiment, the first variation value is preferably a ratio of the first rotation speed to the initial rotation speed, for example, the first rotation speed is n2, the initial rotation speed is n1, and then the first variation value = n2/n 1.
And S30, when the first change value meets a first preset condition, controlling the air conditioner to switch to a defrosting mode to defrost.
Specifically, the first preset condition is a preset condition for determining to start the defrosting mode, wherein the first preset condition is preferably that a first variation value is greater than or equal to a first preset value, and the first preset value may be any one of values from 1.1 to 2.5. Meanwhile, when the first preset value is different in value, the fact that the thickness of the frost layer is different when the defrosting mode is started is indicated, so that the thickness of the frost layer when the defrosting mode is started can be adjusted by changing the first preset value, the air conditioner can start the defrosting mode according to different thicknesses of the frost layer, and the flexibility of the defrosting mode of the air conditioner heat exchanger is improved.
Further, in an embodiment, as shown in fig. 7, when the first variation value satisfies a first preset condition, the controlling the air conditioner to switch to the defrosting mode to defrost specifically includes:
s31, monitoring a second duration when the first change value continuously meets a first preset condition when the first change value meets the first preset condition;
and S32, when the second time length reaches a second preset time length, controlling the air conditioner to enter a defrosting mode.
Specifically, the second preset duration is a duration in which a first change value of the first rotation speed and the initial rotation speed satisfies a first preset condition, and the first change is continued to satisfy the first preset condition. Wherein the second preset time period may be 3 minutes. In addition, in the process of monitoring the second duration when the first change value continuously meets the first preset condition, whether the set time of the air conditioner is changed or not can be monitored in real time, and when the set temperature is not changed, the initial rotating speed corresponding to the set temperature is continuously adopted as a comparison object of the first rotating speed; and when the set temperature changes, acquiring an initial rotating speed corresponding to the changed set temperature, and taking the acquired initial speed after the change as a comparison object of the first rotating speed. For example, when the set temperature is changed from 23 ℃ to 24 ℃, an initial rotation speed corresponding to 24 ℃ is acquired, and the initial rotation speed corresponding to 24 ℃ is taken as a comparison object of the first rotation speed. That is, in the process of monitoring the second duration in which the first variation value continuously satisfies the first preset condition, the initial rotation speed serving as a comparison object of the first rotation speed may be varied according to the set temperature variation of the air conditioner, and when the set temperature is varied, if the first variation value of the first rotation speed and the varied initial rotation speed satisfies the first preset condition, the second duration in which the first variation value continuously satisfies the first preset condition is continuously recorded. That is, in the process of monitoring the second time period in which the first variation value continuously satisfies the first preset condition, the variation of the initial rotation speed does not affect the second time period, and only if the first variation value does not satisfy the first preset condition, the variation of the initial rotation speed affects the second time period.
In another embodiment of the present invention, after controlling the air conditioner to switch to the defrosting mode to defrost when the first variation value satisfies a first preset condition, the method further includes:
detecting a third rotating speed of the impeller of the air conditioner external unit, and calculating a second change value of the third rotating speed and the initial speed;
when the second change value meets a second preset condition, monitoring a third duration when the second change value continuously meets the second preset condition;
and when the third time length reaches a third preset time length, controlling the air conditioner to exit the defrosting mode.
Specifically, after the air conditioner enters the defrosting mode, the frost layer of the heat exchanger is continuously melted, the pressure difference between the inner side and the outer side of the impeller is continuously reduced, and the rotating speed of the impeller is continuously reduced relative to the rotating speed before the air conditioner enters the defrosting mode, so that whether the air conditioner exits the defrosting mode can be determined according to the third rotating speed of the impeller. And the third rotating speed is the rotating speed of the impeller at the detection moment detected by the rotating speed sensor after the air conditioner enters the defrosting mode. After the third rotation speed is obtained, a second variation value of the third rotation speed and the initial rotation speed may be calculated. In this embodiment, the second variation value is a ratio of the third rotation speed to the initial rotation speed, and the second preset condition is that the second variation value is smaller than a second preset value. For example, the third rotation speed is recorded as n3, the first change value of the third rotation speed n3 and the initial rotation speed n1 is n3/n1, and when the third time when n3/n1 is less than or equal to the second preset value A2 and n3/n1 is continuously less than the second preset value A2 is as long as the third preset time, the defrosting operation mode is exited and the normal heating operation is switched to. Wherein, the second preset value is preferably any value of 1.0-1.2.
Further, in one embodiment, the defrosting method of the air conditioner heat exchanger further comprises the following steps:
and when the first rotating speed is not detected within the preset time, prompting a user that the air conditioner breaks down.
Specifically, the air conditioner is provided with a fault prompting device 106, and the fault prompting device 106 is configured to generate a prompt when the rotation speed sensor sends a fault, that is, when the air conditioner does not receive the first rotation speed sent by the rotation speed sensor, the air conditioner determines that the rotation speed sensor or an outdoor unit impeller provided with the rotation speed sensor has a fault, and prompts fault information of the fault to a user to inform the user that the air conditioner has the fault. Therefore, on one hand, the fault can be prompted, and on the other hand, the defrosting failure caused by the fault of the rotating speed sensor can be avoided, so that the defrosting accuracy is improved. The fault prompting device can prompt the fault of the defrosting device in various modes such as sound, characters and the like.
Based on the defrosting method of the air conditioner heat exchanger, the invention provides a computer readable storage medium storing one or more programs, which are executable by one or more processors to implement the steps in the defrosting method of the air conditioner heat exchanger as described above.
Based on the defrosting method of the heat exchanger of the air conditioner, as shown in fig. 8, the present invention provides an air conditioner, which includes at least one processor (processor) 20, a memory (memory) 22, and a rotation speed sensor 24, where the rotation speed sensor 24 is connected to the processor 20, and the processor 20 can call logic instructions in the memory 22 to execute the method in the above embodiment.
Furthermore, the logic instructions in the memory 22 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 22, which is a computer-readable storage medium, may be configured to store a software program, a computer-executable program, such as program instructions or modules corresponding to the methods in the embodiments of the present disclosure. The processor 20 executes the functional application and data processing, i.e. implements the method in the above-described embodiments, by executing the software program, instructions or modules stored in the memory 22.
The memory 22 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 22 may include a high speed random access memory and may also include a non-volatile memory. For example, a variety of media that can store program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, may also be transient storage media.
In addition, the specific processes loaded and executed by the instruction processors in the storage medium and the air conditioner are described in detail in the method, and are not stated herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The defrosting method of the heat exchanger of the air conditioner is characterized in that the method is applied to the heating operation process of the air conditioner, and comprises the following steps:
the method comprises the steps of obtaining an initial rotating speed of an impeller of an air conditioner external unit, and detecting a first rotating speed of the impeller of the air conditioner external unit, wherein the initial rotating speed is the rotating speed of the impeller when an air conditioner heat exchanger runs in a heating mode and the air conditioner heat exchanger is not frosted;
calculating a first change value of the first rotating speed and the initial rotating speed;
When the first change value meets a first preset condition, controlling the air conditioner to switch to a defrosting mode to defrost;
the method includes the steps of obtaining an initial rotating speed of an outer machine impeller of an air conditioner, detecting a first rotating speed of the outer machine impeller of the air conditioner, and specifically including:
detecting the environment temperature of the environment where the air conditioner outdoor unit is located, and judging whether the environment temperature is in a preset temperature range or not;
when the environment temperature is in the preset temperature range, acquiring the initial rotating speed of an impeller of an air conditioner external unit, and detecting the first rotating speed of the impeller of the air conditioner external unit;
wherein, when ambient temperature is in when presetting the temperature interval, acquire the initial rotational speed of outer quick-witted impeller of air conditioner, and detect the first rotational speed of outer quick-witted impeller of air conditioner specifically includes:
when the ambient temperature is in the preset temperature interval, monitoring a first duration that the ambient temperature is continuously in the preset temperature interval;
when the first time reaches a first preset time, acquiring a second rotating speed of the impeller of the air conditioner external unit;
taking the second rotating speed as the initial rotating speed, and detecting the first rotating speed of the impeller of the air conditioner external unit;
the determination process of the first preset time length is as follows: when the air conditioner is in a heating mode and the environment temperature is in a preset temperature range, acquiring and recording a fourth rotating speed of an impeller of an air conditioner external unit, acquiring a fifth rotating speed of the impeller of the air conditioner external unit again after a set time interval, and comparing the fifth rotating speed with the fourth rotating speed; if the fifth rotating speed is greater than the fourth rotating speed, acquiring an acquiring moment corresponding to the fourth rotating speed, calculating a time interval between the acquiring moment and an initial moment when the air conditioner is in a heating mode and the environment temperature is in a preset temperature interval, taking the calculated time interval as a first preset duration, and storing the first preset duration; if the fifth rotating speed is equal to the fourth rotating speed, recording the fifth rotating speed and the acquiring time of the fifth rotating speed, and repeating the operation of acquiring the rotating speed of the impeller of the outdoor unit of the air conditioner at intervals of preset time until the fifth rotating speed is greater than the fourth rotating speed; if the fifth rotating speed is less than the fourth rotating speed, the fifth rotating speed is not saved; and periodically acquiring the outdoor environment temperature, and replacing the first preset time length with the preset time length A corresponding to the outdoor environment temperature acquired in the current period when the running time length of the air conditioner in the heating mode and the environment temperature in the preset temperature interval does not reach the preset time length A and the outdoor environment temperature acquired in the current period is less than the outdoor environment temperature acquired in the previous period.
2. The defrosting method for an air conditioner heat exchanger according to claim 1, wherein the obtaining of the initial rotation speed of the impeller of the air conditioner external unit and the detecting of the first rotation speed of the impeller of the air conditioner external unit specifically include:
acquiring a set temperature of the air conditioner, and determining a rotating speed corresponding to the set temperature;
and taking the rotating speed corresponding to the set temperature as the initial rotating speed, and detecting the first rotating speed of the impeller of the air conditioner external unit.
3. The defrosting method of an air conditioner heat exchanger according to claim 1, wherein when the first variation value satisfies a first preset condition, the controlling the air conditioner to switch to a defrosting mode to defrost specifically comprises:
when the first change value meets a first preset condition, monitoring a second duration when the first change value continuously meets the first preset condition;
and when the second time length reaches a second preset time length, controlling the air conditioner to enter a defrosting mode.
4. The defrosting method of an air conditioner heat exchanger according to claim 1, wherein after controlling the air conditioner to switch to a defrosting mode for defrosting when the first variation value satisfies a first preset condition, the method further comprises:
Detecting a third rotating speed of the impeller of the air conditioner external unit, and calculating a second change value of the third rotating speed and the initial rotating speed;
when the second change value meets a second preset condition, monitoring a third duration when the second change value continuously meets the second preset condition;
and when the third time length reaches a third preset time length, controlling the air conditioner to exit the defrosting mode.
5. The defrosting method for a heat exchanger of an air conditioner according to any one of claims 1 to 4, wherein a rotation speed sensor is provided to the outer blade of the air conditioner, and the method further comprises:
and detecting the rotating speed of the blades of the air conditioner external unit through a rotating speed sensor.
6. The defrosting method of an air conditioner heat exchanger according to any one of claims 1 to 4, characterized in that the method further comprises:
and when the first rotating speed is not detected within the preset time, prompting a user that the air conditioner breaks down.
7. An air conditioner, characterized in that it comprises: the device comprises a processor, a memory and a communication bus, wherein the memory is stored with a computer readable program which can be executed by the processor;
the communication bus realizes connection communication between the processor and the memory;
the processor, when executing the computer readable program, performs the steps of the method for defrosting an air conditioner heat exchanger as recited in any one of claims 1 to 6.
8. The air conditioner as claimed in claim 7, further comprising a rotation speed sensor disposed on the impeller of the outdoor unit of the air conditioner and communicated with the processor, wherein the rotation speed sensor transmits the detected rotation speed of the impeller of the outdoor unit of the air conditioner to the processor.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106745A (en) * | 2009-11-18 | 2011-06-02 | Daikin Industries Ltd | Outdoor unit of air conditioner |
| CN103557651A (en) * | 2013-10-25 | 2014-02-05 | 周晓明 | Intelligent defrosting method for air-cooled heat pump air conditioner |
| CN203550069U (en) * | 2012-11-02 | 2014-04-16 | 大金工业株式会社 | Outdoor unit for air conditioning device |
| CN104061650A (en) * | 2013-03-19 | 2014-09-24 | 约克广州空调冷冻设备有限公司 | Frosting judgment method of air-cooled heat pump air conditioner |
| CN105066276A (en) * | 2015-08-27 | 2015-11-18 | 珠海格力电器股份有限公司 | Outdoor unit |
| CN105318492A (en) * | 2014-07-30 | 2016-02-10 | 广东美的集团芜湖制冷设备有限公司 | Defrosting control method and device for air conditioner |
| CN105953365A (en) * | 2016-05-16 | 2016-09-21 | 广东美的制冷设备有限公司 | Air conditioner and defrosting control method thereof |
| CN106288144A (en) * | 2016-07-26 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner and Defrost method thereof |
| JP2018128194A (en) * | 2017-02-08 | 2018-08-16 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN108507127A (en) * | 2018-02-14 | 2018-09-07 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN109724225A (en) * | 2019-01-02 | 2019-05-07 | 四川长虹空调有限公司 | The method of raising DC frequency converting air-conditioner outdoor unit heat exchange property based on temperature difference detection |
| CN109780683A (en) * | 2019-01-24 | 2019-05-21 | 青岛海尔空调电子有限公司 | Air conditioner control method, device and air conditioner |
| CN110762747A (en) * | 2018-07-10 | 2020-02-07 | 青岛海尔空调电子有限公司 | Defrost control method of air conditioner |
| CN211903092U (en) * | 2020-04-02 | 2020-11-10 | 江西浩金欧博空调制造有限公司 | Integrated air conditioning unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775993B2 (en) * | 2002-07-08 | 2004-08-17 | Dube Serge | High-speed defrost refrigeration system |
| CN102003842B (en) * | 2010-11-04 | 2013-04-10 | 三花控股集团有限公司 | Evaporator and refrigeration system with same |
| CN104501350A (en) * | 2014-11-17 | 2015-04-08 | 广东美的制冷设备有限公司 | Air conditioner control method and air conditioner |
| CN105737389B (en) * | 2014-12-10 | 2019-06-18 | 青岛经济技术开发区海尔热水器有限公司 | Efficient defrosting method and device combining fan speed and pressure control |
| CN105066363B (en) * | 2015-08-26 | 2018-01-19 | Tcl空调器(中山)有限公司 | Defrosting control method and device of air conditioner |
| CN106052021B (en) * | 2016-05-27 | 2018-10-23 | 深圳市英维克科技股份有限公司 | A kind of defrosting judgment method |
| CN106288230B (en) * | 2016-09-22 | 2019-03-12 | Tcl空调器(中山)有限公司 | Defrosting control method and device for window type air conditioner |
| CN109442679B (en) * | 2018-11-06 | 2020-10-30 | 广东美的制冷设备有限公司 | Control method and system of air conditioner and air conditioner |
-
2019
- 2019-05-30 CN CN201910464215.1A patent/CN112013502B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011106745A (en) * | 2009-11-18 | 2011-06-02 | Daikin Industries Ltd | Outdoor unit of air conditioner |
| CN203550069U (en) * | 2012-11-02 | 2014-04-16 | 大金工业株式会社 | Outdoor unit for air conditioning device |
| CN104061650A (en) * | 2013-03-19 | 2014-09-24 | 约克广州空调冷冻设备有限公司 | Frosting judgment method of air-cooled heat pump air conditioner |
| CN103557651A (en) * | 2013-10-25 | 2014-02-05 | 周晓明 | Intelligent defrosting method for air-cooled heat pump air conditioner |
| CN105318492A (en) * | 2014-07-30 | 2016-02-10 | 广东美的集团芜湖制冷设备有限公司 | Defrosting control method and device for air conditioner |
| CN105066276A (en) * | 2015-08-27 | 2015-11-18 | 珠海格力电器股份有限公司 | Outdoor unit |
| CN105953365A (en) * | 2016-05-16 | 2016-09-21 | 广东美的制冷设备有限公司 | Air conditioner and defrosting control method thereof |
| CN106288144A (en) * | 2016-07-26 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner and Defrost method thereof |
| JP2018128194A (en) * | 2017-02-08 | 2018-08-16 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN108507127A (en) * | 2018-02-14 | 2018-09-07 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN110762747A (en) * | 2018-07-10 | 2020-02-07 | 青岛海尔空调电子有限公司 | Defrost control method of air conditioner |
| CN109724225A (en) * | 2019-01-02 | 2019-05-07 | 四川长虹空调有限公司 | The method of raising DC frequency converting air-conditioner outdoor unit heat exchange property based on temperature difference detection |
| CN109780683A (en) * | 2019-01-24 | 2019-05-21 | 青岛海尔空调电子有限公司 | Air conditioner control method, device and air conditioner |
| CN211903092U (en) * | 2020-04-02 | 2020-11-10 | 江西浩金欧博空调制造有限公司 | Integrated air conditioning unit |
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|---|---|
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