CN109323368B - Air conditioner and defrosting method and device thereof - Google Patents
Air conditioner and defrosting method and device thereof Download PDFInfo
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- CN109323368B CN109323368B CN201811163184.8A CN201811163184A CN109323368B CN 109323368 B CN109323368 B CN 109323368B CN 201811163184 A CN201811163184 A CN 201811163184A CN 109323368 B CN109323368 B CN 109323368B
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- air conditioner
- temperature
- defrosting
- air
- frosting
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses an air conditioner and a defrosting method and device thereof, which comprise the following steps: when the air conditioner operates in a heating mode, acquiring a second temperature of an air inlet of the outdoor heat exchanger and a first humidity of a refrigerant outlet of the outdoor heat exchanger; determining a current frosting interval where the air conditioner is located according to the second temperature and the first humidity, identifying that the air conditioner is in a frosting state according to the frosting interval, and detecting the air conditioning capacity of the air conditioner within a preset time length; judging whether the current frosting speed of the air conditioner exceeds a preset frosting speed or not according to the detected air conditioner capacity; when the current frosting speed exceeds the preset frosting speed, the air conditioner is controlled to enter the defrosting process, the frosting condition is judged according to the air conditioner capacity, the defrosting process can be timely entered, and the defrosting effect is effectively improved under the condition that the air conditioning heat effect is ensured.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a defrosting method and device thereof.
Background
In the heating operation process of the air conditioner, the outdoor heat exchanger operates as a condenser, and at the moment, because the outdoor temperature is too low, the outdoor heat exchanger is easy to frost due to heat absorption and condensation of the outdoor heat exchanger, and therefore defrosting operation needs to be carried out on the outdoor heat exchanger.
In the related art, in order to control the air conditioner to perform a defrosting process, it is generally determined whether the temperature of the outdoor heat exchanger reaches a preset temperature. However, the related art has the problems that due to different environmental factors of the air conditioner, it is difficult to unify the judgment conditions of the defrosting operation, so that the air conditioner is in use, or the air conditioner enters the defrosting operation too early to affect the user experience due to the reduction of the heating efficiency of the air conditioner, or enters the defrosting operation too late to cause the outdoor heat exchanger to frost too thick, the time for complete defrosting is longer, the sensible temperature fluctuation of the user is larger, and meanwhile, due to the frosting too thick, if the defrosting is not thorough, the problem that the longer the heating time of the air conditioner is, the worse the heating effect is caused is easily caused, and even the air conditioner is damaged.
Disclosure of Invention
The embodiment of the application provides a defrosting method of an air conditioner, solves the problem that in the prior art, the defrosting opportunity cannot be accurately judged, and the frosting condition can be judged according to the temperature and the humidity, so that a defrosting process can be timely entered, and the defrosting effect is effectively improved under the condition that the air conditioning heat effect is ensured.
The embodiment of the application provides a defrosting method of an air conditioner, which comprises the following steps: when the air conditioner operates in a heating mode, acquiring a second temperature of an air inlet of the outdoor heat exchanger and a first humidity of a refrigerant outlet of the outdoor heat exchanger; determining a current frosting interval where the air conditioner is located according to the second temperature and the first humidity, identifying that the air conditioner is in a frosting state according to the frosting interval, and detecting the air conditioning capacity of the air conditioner within a preset time length; judging whether the current frosting speed of the air conditioner exceeds a preset frosting speed or not according to the detected air conditioner capacity; and when the current frosting speed exceeds the preset frosting speed, controlling the air conditioner to enter a defrosting process.
According to one embodiment of the invention, a first temperature sensor, a second temperature sensor, a third temperature sensor and a first humidity sensor are arranged on an outdoor heat exchanger of the air conditioner; the first temperature sensor and the first humidity sensor are arranged at a refrigerant outlet of the outdoor heat exchanger, and the second temperature sensor is arranged at an air inlet of the outdoor heat exchanger; the third temperature sensor is disposed at an air outlet of the air conditioner, the method further comprising: and acquiring a second temperature of the second temperature sensor and a first humidity of the first humidity sensor.
According to an embodiment of the present invention, before detecting the air conditioning capacity of the air conditioner within the preset time period, the method further includes: and adjusting the operating frequency of a compressor in the air conditioner according to the current frosting interval, and controlling the air conditioner to operate at a preset interval.
According to an embodiment of the present invention, before acquiring the second temperature of the second temperature sensor and the first humidity of the first humidity sensor, the method further includes: acquiring a first temperature of the first temperature sensor and a third temperature of the third temperature sensor; judging whether the first temperature is lower than a preset temperature threshold value or not; judging whether the third temperature is in a first temperature range or not; and if the first temperature is lower than a preset temperature threshold value and the third temperature is in the first temperature range, triggering to acquire the second temperature of the second temperature sensor and the first humidity of the first humidity sensor.
According to an embodiment of the present invention, the determining whether the current frosting speed of the air conditioner exceeds a preset frosting speed according to the detected air conditioner capacity includes: judging whether the air conditioning capacity is attenuating or not according to the air conditioning capacity at any adjacent time within the preset time length; if the air conditioning capacity is attenuating, acquiring the attenuation rate of the air conditioning capacity at the current moment; and comparing the attenuation rate of the current moment with an attenuation rate threshold, and if the attenuation rate of the current moment is greater than the attenuation rate threshold, determining that the current frosting speed exceeds the preset frosting speed.
According to an embodiment of the present invention, before comparing the decay rate of the current time with the decay rate threshold, the method further includes: and acquiring the attenuation rate threshold of the air conditioner according to the type of the air conditioner.
According to an embodiment of the present invention, the determining whether the air conditioning capacity is attenuating according to the air conditioning capacity at any adjacent time within the preset time period includes: and continuously comparing the air conditioning capacity at the adjacent moments, and determining that the air conditioning capacity is attenuating if the air conditioning capacity at the previous moment is higher than the air conditioning capacity at the later moment.
According to an embodiment of the present invention, the obtaining of the decay rate of the air conditioning capacity at the current time includes: obtaining the attenuation values of the air conditioning capacity at the current moment and the air conditioning capacity at the previous moment; and obtaining the attenuation rate of the current moment according to the difference value between the attenuation value and the attenuation value of the previous moment.
According to an embodiment of the present invention, after controlling the air conditioner to enter the defrosting process, the method further includes: detecting the temperature of a temperature detection point on the air conditioner, judging whether the air conditioner needs to exit the defrosting process or not according to the temperature, and controlling the air conditioner to exit the defrosting process when the air conditioner needs to exit the defrosting process; or detecting the change of the air conditioner capacity, judging whether the defrosting process needs to be exited or not according to the change of the air conditioner capacity, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. when the air conditioner is in a frosting state, the frosting condition is judged according to the air conditioner capacity, the defrosting process can be timely started, and the defrosting effect is effectively improved under the condition that the air conditioning heat effect is ensured.
2. The interval division is carried out on the humidity, namely the interval which is easy to frost and the interval which is not easy to frost are distinguished, so that the defrosting judgment logic is effectively simplified, and the calculated amount of the air conditioner is reduced.
Drawings
FIG. 1 is a schematic diagram of an air conditioner system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an air conditioner control system according to an embodiment of the present invention;
fig. 3 is a flowchart of a defrosting method of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a graph of outdoor relative humidity/outdoor temperature versus a level of frost susceptibility according to one embodiment of the present invention;
fig. 5 is a flowchart of a defrosting method of an air conditioner according to an embodiment of the present invention;
fig. 6 is a block schematic view of a defrosting apparatus of an air conditioner according to an embodiment of the present invention;
fig. 7 is a block schematic view of a defrosting apparatus of an air conditioner according to an embodiment of the present invention;
fig. 8 is a block diagram schematically illustrating an air conditioner according to an embodiment of the present invention.
Detailed Description
The invention provides a defrosting method of an air conditioner, aiming at solving the problem that the defrosting time cannot be accurately judged in the prior art, and the method is used for determining the current defrosting speed of the air conditioner by detecting the air conditioning capacity of the air conditioner when the air conditioner is in a frosting state, judging whether to enter a defrosting process according to the frosting speed of the air conditioner, so that the defrosting process can be entered in time, and effectively improving the defrosting effect under the condition of ensuring the air conditioning heat effect.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, a defrosting method of an air conditioner according to an embodiment of the present invention is directed to an air conditioner system and an air conditioner control system described below.
Specifically, as shown in fig. 1, an air conditioner system 100 on which the present invention is based includes: the air conditioner comprises a compressor 1, a four-way valve 2, an outdoor fan 31, an outdoor heat exchanger 32, a throttling component 4, an indoor fan 51 and an indoor heat exchanger 52, wherein the indoor fan 51 and the indoor heat exchanger 52 are correspondingly arranged and are arranged on the indoor side, and the outdoor fan 31 and the outdoor heat exchanger 32 are correspondingly arranged and are arranged on the outdoor side.
Wherein, the outlet of the outdoor heat exchanger 32 is connected with the inlet of the indoor heat exchanger 52 through the throttle part 4, the outlet of the indoor heat exchanger 52 is connected with the first end of the four-way valve 2, the second end of the four-way valve 2 is connected with the inlet of the compressor 1, the third end of the four-way valve 2 is connected with the outlet of the compressor 1, and the fourth end of the four-way valve 2 is connected with the inlet of the outdoor heat exchanger 32.
Therefore, the defrosting method of the air conditioner provided by the invention is based on the air conditioner system, and can realize the heating operation of the air conditioner through the transmission of the refrigerant. The outdoor heat exchanger 32 further has an air inlet, so that the outdoor heat exchanger 32 can perform heat absorption condensation when the air conditioner performs heating, that is, the outdoor heat exchanger 32 absorbs heat of outside air to perform condensation.
Further, a plurality of temperature sensors and a humidity sensor may be provided on the air conditioner system 100. For example, the air conditioner system 100 may include at least a first temperature sensor 61, a second temperature sensor 62, a third temperature sensor 63, and a first humidity sensor 70, wherein the first temperature sensor 61 may be disposed at an outlet of the outdoor heat exchanger 32 to detect an outlet temperature of the outdoor heat exchanger 32, the second temperature sensor 62 may be disposed at an air inlet of the outdoor heat exchanger 32 to detect a suction air temperature when the outdoor heat exchanger 32 performs a condensation operation, the third temperature sensor 63 may be disposed at an air outlet of the compressor 1 to detect a temperature of the refrigerant before the refrigerant enters the outdoor heat exchanger 32 after being compressed by the compressor 1, and the first humidity sensor 70 may be disposed on a casing of the outdoor heat exchanger 32 to detect a current outdoor relative humidity.
Still further, the air conditioner system 100 may be further provided with a fourth temperature sensor 64 and a fifth temperature sensor 65 at the inlet and inside of the outdoor heat exchanger 32, respectively; a sixth temperature sensor 66, a seventh temperature sensor 67, an eighth temperature sensor 68, and a ninth temperature sensor 69 may be further provided at the inlet, the outlet, the interior, and the housing of the indoor heat exchanger 52, respectively. It should be understood that the temperature sensor may also be located at any point where temperature is to be sensed, such as at the inlet of the compressor and the housing.
It should be noted that the air conditioner system may also be controlled by an air conditioner control system, where, as shown in fig. 2, the air conditioner control system 200 may include: an acquisition module 21, an analysis feedback module 22, a control module 23, a transmission module 24 and a storage module 25.
The obtaining module 21 may be configured to obtain real-time parameters of the air conditioner, such as a current operation rate and an air conditioning capacity of the air conditioner; the analysis feedback module 22 is connected with the acquisition module 21, and the analysis feedback module 22 can acquire data through the acquisition module 21, analyze the data to generate state information of the air conditioner, and feed the state information back to the transmission display module 24 and/or the control module 23; the transmission module 24 is connected to the analysis feedback module 22, and is configured to communicate with a user terminal, so as to send the air conditioner state information obtained by the analysis feedback module 22 to the user terminal and receive a control instruction fed back by the user terminal, where the user terminal may be a mobile terminal, a computer terminal, or a cloud terminal, which enables a user to receive the state information of the current air conditioner and/or send a control instruction; the control module 23 may be connected to the analysis feedback module 22 and the transmission module 24, respectively, to control the air conditioner according to the status information sent by the analysis feedback module 22 and/or according to the control instruction fed back by the transmission module 24; the storage module 25 may be connected to the obtaining module 21 and the transmission module 24, respectively, and is configured to store real-time parameters and control commands of the air conditioner.
That is, the air conditioner system 100 may be operated under the control of the air conditioner control system 200, including the control system 100 performing a heating operation under the control of the air conditioner control system 200. During the heating operation of the air conditioning system 100, the outdoor heat exchanger 32 is used as a condenser to absorb heat, and since the outdoor temperature is low in winter, the outdoor heat exchanger 32 is prone to frosting during the condensation process, thereby further affecting the further heating effect of the air conditioner.
Based on this, the embodiment of the invention provides a defrosting method of an air conditioner.
Example one
Due to the problems of the installation position of the air conditioner and the smoothness of an air duct during installation, the temperature of the collected area is reduced quickly, or due to the fact that when the outdoor temperature is low, deviation exists among the actual voltage, current and the collected voltage and current, the collected temperature is deviated. That is, even though a drop in temperature at the temperature detection point is detected, the outdoor heat exchanger may not be frosted in practice. According to statistics, when 27% of air conditioners enter into defrosting in the winter of Beijing area every year, the air conditioners do not frost, and when 68% of air conditioners defrost, the frost layer on the surface of the outdoor heat exchanger is very thin, and the air conditioning capacity cannot be influenced to a large extent. Therefore, the embodiment of the invention increases the judgment of the humidity so as to judge whether the air conditioner needs defrosting more accurately.
Fig. 3 is a flowchart of a defrosting method of an air conditioner according to the present invention. As shown in fig. 3, the defrosting method of an air conditioner according to an embodiment of the present invention includes the following steps:
s101: when the air conditioner operates in a heating mode, a second temperature of the air inlet of the outdoor heat exchanger and a first humidity of the refrigerant outlet of the outdoor heat exchanger are obtained.
The air conditioner runs in a heating mode, and a first temperature sensor, a second temperature sensor, a third temperature sensor and a first humidity sensor are arranged on an outdoor heat exchanger of the air conditioner; the first temperature sensor and the first humidity sensor are arranged at a refrigerant outlet of the outdoor heat exchanger and used for detecting a first temperature and a first humidity at the refrigerant outlet of the outdoor heat exchanger, and the second temperature sensor is arranged at an air inlet of the outdoor heat exchanger and used for detecting a second temperature at the air inlet of the outdoor heat exchanger; the third temperature sensor is arranged at an air outlet of the air conditioner. Wherein, whether the air conditioner is in a heating mode can be determined by the state of the four-way valve or the outlet temperature of the outdoor heat exchanger.
Before acquiring the second temperature of the second temperature sensor and the first humidity of the first humidity sensor, the method further includes: acquiring a first temperature of a first temperature sensor and a third temperature of a third temperature sensor; judging whether the first temperature is lower than a preset temperature threshold value or not; judging whether the third temperature is in the first temperature range or not; and if the first temperature is lower than a preset temperature threshold value and the third temperature is in a first temperature range, triggering to acquire a second temperature of the second temperature sensor and a first humidity of the first humidity sensor.
Wherein the preset temperature threshold value can be 1 ℃, namely, whether the first temperature is lower than 1 ℃ or not is judged, the first temperature range is-6 ℃ to 6 ℃, and the third temperature is judged to be in the temperature range of-6 ℃ to 6 ℃. In other words, when the first temperature is lower than 1 ℃ and the third temperature is in the temperature range of-6 ℃ to 6 ℃, the outdoor air is easy to frost, when the first temperature is higher than 1 ℃ or the third temperature is higher than 6 ℃, the whole temperature of the air conditioner is higher without defrosting judgment, and when the third temperature is lower than-6 ℃, the air conditioner can be directly controlled to operate at ultralow temperature.
When the air conditioner operates in the ultra-low temperature operation mode, the air conditioner can be controlled to inquire whether a user needs defrosting after the air conditioner operates for a preset time so as to carry out defrosting operation according to the instruction of the user.
S102: and determining the current frosting interval where the air conditioner is located according to the second temperature and the first humidity, identifying the frosting state of the air conditioner according to the frosting interval, and detecting the air conditioning capacity of the air conditioner within a preset time length.
As shown in fig. 4, the frosting degree of the air conditioner is not the same under different outdoor relative humidity and outdoor temperature, wherein the second temperature may correspond to the outdoor temperature in fig. 4, and the first humidity may correspond to the outdoor relative humidity in fig. 4.
It should be noted that, when the current frosting interval where the air conditioner is located is determined, the operating frequency of the compressor in the air conditioner is adjusted according to the current frosting interval, and the air conditioner is controlled to perform the preset interval. The preset interval may be a preset time interval, that is, the air conditioner is controlled to operate according to the adjusted operating frequency for the preset time interval.
Specifically, when the temperature and the humidity are in the slight frosting area I, the heating quantity in a certain room can be reduced, the preset heating time is prolonged, and the temperature fluctuation in the room can be controlled, so that the operating frequency of the compressor can be controlled to be increased, for example, to be increased by 3 Hz; when the temperature and the humidity are in the severe frosting area III, the frequency of the compressor needs to be properly increased so that the air conditioner is not easy to frost, and when the overall outdoor temperature of the air conditioning system is too low, a certain heating capacity is increased so as to be beneficial to reaching comfortable temperature in a room as soon as possible.
It should be understood that the operating frequency of the compressor in the air conditioner can be controlled to be adjusted by setting a fixed frequency value, and can also be set to be adjusted by setting a temperature-humidity related function so as to adjust the frequency under different temperature and humidity conditions.
S103: and judging whether the current frosting speed of the air conditioner exceeds a preset frosting speed or not according to the detected air conditioner capacity.
It should be understood that in the embodiment of the present invention, the air conditioning capacity may be indoor heating capacity, and may further include sensible heat capacity and latent heat capacity. The air conditioning capacity is related to the temperatures of the temperature detection points and the compressor frequency, that is, the temperatures detected by the temperature sensors and the compressor frequency are obtained through calculation.
It should be noted that, the frosting condition of the outdoor heat exchanger of the air conditioner is mainly the condition that the attenuation of the air conditioning capacity is large, so the current frosting speed of the air conditioner can be judged by detecting the air conditioning capacity.
Specifically, as shown in fig. 5, determining whether the frosting speed of the air conditioner exceeds a preset frosting speed according to the detected air conditioner capacity includes:
s201: and judging whether the air conditioning capacity is attenuating or not according to the air conditioning capacity at any adjacent moment in the preset time length.
Specifically, the air conditioning capacities at adjacent times are continuously compared, and if the air conditioning capacity at the previous time is higher than the air conditioning capacity at the latter time, it is determined that the air conditioning capacity is being attenuated.
S202: and if the air conditioning capacity is attenuating, acquiring the attenuation rate of the air conditioning capacity at the current moment.
S203: and comparing the attenuation rate at the current moment with an attenuation rate threshold, and determining that the current frosting speed exceeds a preset frosting speed if the attenuation rate at the current moment is greater than the attenuation rate threshold.
The method comprises the steps of obtaining an attenuation rate threshold value of the air conditioner according to the type of the air conditioner.
That is to say, after the decay rate at each moment in the preset duration is obtained, whether the decay rate at the latter moment is greater than the decay rate at the former moment is judged, if the decay rate at the latter moment is greater than the decay rate at the former moment, it is indicated that the frosting state of the outdoor heat exchanger begins to influence the overall heating efficiency of the air conditioner, whether the decay rate is greater than a decay rate threshold is further judged, so as to determine the defrosting time, that is, if the decay rate is greater than the decay rate threshold, it is determined that the current frosting speed exceeds the preset frosting speed.
For example, the preset time period may be equally divided into a plurality of times, for example, a first time X1, a second time X2, a third time X3, …, and an nth time Xn, the heating amounts corresponding to the respective times are A, B, C and …, so that the attenuation amount of the heating amount at the respective times in the first preset time period may be obtained, for example, the attenuation amount at the second time is (B-a), the attenuation amount at the third time is (C-B), and so on, the attenuation amount at any time in the preset time period may be obtained, and since the preset time period is equally divided, the attenuation amount at each time is the attenuation rate of the heating amount at each time. It should be understood that the decay rate may also be obtained by other methods such as summing or differencing.
Then, it is determined whether the decay rate at any later time within the preset time period is greater than the decay rate at the previous time, for example, it is determined whether the decay rate (C-B) at the third time X3 is greater than the decay rate (B-a) at the second time X2, if the decay rate at the third time X3 is less than or equal to the decay rate at the second time X2, it indicates that the indoor heating amount at the third time X3 is not reduced or uniformly reduced with respect to the indoor heating amount at the second time X2, that is, the frosting degree of the outdoor heat exchanger does not affect the air conditioning capacity, at this time, the decay rate is continuously determined, if the decay rate at the third time X3 is greater than the decay rate at the second time X2, it indicates that the indoor heating amount at the third time X3 is significantly reduced with respect to the indoor heating amount at the second time X2, that the frosting degree of the outdoor heat exchanger already affects the air conditioning capacity, judging whether the frosting of the outdoor heat exchanger of the air conditioner has a deterioration trend, and further judging whether the frosting speed exceeds a preset frosting speed or not.
It should be noted that, because the intrinsic parameters of the air conditioners of different models are different, the attenuation rate threshold of the air conditioner can be obtained according to the models of the air conditioners, so as to determine whether the current frosting speed exceeds the preset frosting speed through the attenuation rate threshold, and prevent the air conditioner from defrosting too early or too late. Specifically, whether the attenuation rate at the current moment is greater than the attenuation rate threshold is judged to determine that the frosting degree of the outdoor heat exchanger seriously affects the air conditioning capacity, that is, when the current attenuation rate is less than or equal to the attenuation rate threshold, the current frosting speed does not exceed the preset frosting speed, and when the current attenuation rate is greater than the attenuation rate threshold, the current frosting speed exceeds the preset frosting speed.
Therefore, by detecting the attenuation rates at different moments and determining that the frosting speed exceeds the preset frosting speed when the attenuation rates are gradually increased and are larger than the preset attenuation threshold value, the frosting condition of the air conditioning system can be accurately determined when the air conditioner is in heating operation, and data guarantee is provided for the air conditioner to enter a defrosting process.
S104: and when the current frosting speed exceeds the preset frosting speed, controlling the air conditioner to enter a defrosting process.
It should be understood that when the current frosting speed does not exceed the preset frosting speed, the outdoor heat exchanger frosts, but the frosting speed is low or the frosting is thin and is not enough to start the defrosting operation, if the defrosting operation is started, the problem that the heating quantity is reduced too early due to the defrosting to influence the user experience can occur, when the current frosting speed exceeds the preset frosting speed, the frosting of the outdoor heat exchanger is serious, at the moment, the defrosting is performed, the defrosting time can be saved, the heating efficiency of the air conditioner can be ensured, and therefore when the current frosting speed is judged to exceed the preset frosting speed, the air conditioner is controlled to enter a defrosting process.
Further, after controlling the air conditioner to enter the defrosting process, the method further comprises the following steps: detecting the temperature of a temperature detection point on the air conditioner, judging whether the defrosting process needs to be exited or not according to the temperature, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited; or detecting the change of the air conditioner capacity, judging whether the defrosting process needs to be exited or not according to the change of the air conditioner capacity, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited.
It should be noted that, after the air conditioner enters the defrosting process, in order to save energy and ensure the heating requirement of the user, the air conditioner needs to be controlled to exit the defrosting process in time after the defrosting is finished.
Specifically, the temperature of a temperature detection point on the air conditioner is detected, for example, the temperature of any one or more temperature detection points on the air conditioner system is detected, whether the temperature of the temperature detection point reaches a preset temperature is judged, if so, it is determined that the air conditioner needs to exit the defrosting process, and the air conditioner is controlled to exit the defrosting process; if not, determining that the air conditioner still needs defrosting, and controlling the air conditioner to continue defrosting. In addition, the air conditioning capacity can be detected, and whether the defrosting process needs to be quitted or not is judged according to the change of the air conditioning capacity, namely the defrosting process is quitted when the air conditioning capacity is gradually recovered.
In summary, in the defrosting method of the air conditioner according to the embodiment of the present invention, the second temperature of the second temperature sensor and the first humidity of the first humidity sensor are first obtained, then the current frosting area where the air conditioner is located is determined according to the second temperature and the first humidity, if the current frosting area indicates that the air conditioner is in a frosting state, the air conditioning capacity of the air conditioner within a preset time duration is detected, then according to the detected air conditioning capacity, whether the current frosting speed of the air conditioner exceeds the preset frosting speed is determined, and when the current frosting speed exceeds the preset frosting speed, the air conditioner is controlled to enter a defrosting process. Therefore, the defrosting method of the air conditioner provided by the embodiment of the invention can judge the frosting condition according to the air conditioner capacity, timely enter the defrosting process, and effectively improve the defrosting effect under the condition of ensuring the air conditioning heat effect.
Based on the same inventive concept, the embodiment of the invention also provides a system corresponding to the method in the first embodiment, which is shown in the second embodiment.
Example two
Fig. 6 is a block diagram illustrating a defrosting apparatus of an air conditioner according to an embodiment of the present invention. The air conditioner runs in a heating mode, and is provided with a first temperature sensor, a second temperature sensor, a third temperature sensor and a first humidity sensor; the first temperature sensor and the first humidity sensor are arranged at a refrigerant outlet of the outdoor heat exchanger, and the second temperature sensor is arranged at an air inlet of the outdoor heat exchanger; the third temperature sensor is arranged at an air outlet of the air conditioner.
As shown in fig. 6, the defrosting apparatus 10 of an air conditioner according to an embodiment of the present invention includes: the device comprises an acquisition module 11, an interval determination module 12, a detection module 13, a judgment module 14 and a control module 15.
The acquiring module 11 is configured to acquire a second temperature of the second temperature sensor and a first humidity of the first humidity sensor; the interval determining module 12 is configured to determine a current frosting interval where the air conditioner is located according to the second temperature and the first humidity; the detection module 13 is configured to detect the air conditioning capacity of the air conditioner within a preset time period when the current frosting interval indicates that the air conditioner is in a frosting state; the judging module 14 is configured to judge whether a current frosting speed of the air conditioner exceeds a preset frosting speed according to the detected air conditioner capacity; the control module 15 is configured to control the air conditioner to enter a defrosting process when the current defrosting speed exceeds a preset defrosting speed.
Further, the control module 15 is specifically configured to: and adjusting the operating frequency of a compressor in the air conditioner according to the current frosting interval, and controlling the air conditioner to operate for a preset interval.
Further, the obtaining module 11 is specifically configured to: acquiring a first temperature of a first temperature sensor and a third temperature of a third temperature sensor; judging whether the first temperature is lower than a preset temperature threshold value or not; judging whether the third temperature is in the first temperature range or not; and if the first temperature is lower than a preset temperature threshold value and the third temperature is in a first temperature range, triggering to acquire a second temperature of the second temperature sensor and a first humidity of the first humidity sensor.
Further, as shown in fig. 7, the second determining module 14 further includes: a judging unit 141, an acquiring unit 142, and a determining unit 143.
The judging unit 141 is configured to judge whether the air-conditioning capacity is attenuating according to the air-conditioning capacity at any adjacent time within a preset time length; the obtaining unit 142 is configured to obtain an attenuation rate of the air conditioning capacity at the current time when the air conditioning capacity is attenuating; the determining unit 143 is configured to compare the attenuation rate at the current time with an attenuation rate threshold, and determine that the current frosting speed degree of the air conditioner exceeds a preset frosting speed degree if the attenuation rate at the current time is greater than the attenuation rate threshold.
Further, the determining unit 143 is further configured to: and before comparing the attenuation rate at the current moment with the attenuation rate threshold, acquiring the attenuation rate threshold of the air conditioner according to the type of the air conditioner.
Further, the judging unit 141 is further configured to: and continuously comparing the air conditioning capacity of the adjacent time, and determining that the air conditioning capacity is attenuating if the air conditioning capacity of the previous time is higher than that of the latter time.
Further, the obtaining unit 142 is specifically configured to: obtaining the attenuation values of the air conditioning capacity at the current moment and the air conditioning capacity at the previous moment; and obtaining the attenuation rate of the current moment according to the difference between the attenuation value and the attenuation value of the previous moment.
Further, as shown in fig. 7, the defrosting device 10 of the air conditioner further includes: the defrosting monitoring module 16 is used for detecting the temperature of a temperature detection point on the air conditioner after the air conditioner is controlled to enter defrosting, judging whether the defrosting process needs to be exited or not according to the temperature, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited; or detecting the change of the air conditioner capacity, judging whether the defrosting process needs to be exited or not according to the change of the air conditioner capacity, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited.
Since the apparatus described in the second embodiment of the present invention is an apparatus used for implementing the method of the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, those skilled in the art can understand the specific structure and the variations of the system, and thus the details are not described herein. All the devices adopted in the method of the first embodiment of the present invention belong to the protection scope of the present invention.
In order to achieve the above object, an embodiment of the present invention further provides an air conditioner, as shown in fig. 8, the air conditioner 300 includes a defrosting apparatus 10 of the air conditioner.
In order to achieve the above object, an embodiment of the present invention further provides an electronic device, including a memory and a processor; the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the defrosting method of the air conditioner.
To achieve the above object, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the foregoing defrosting method of an air conditioner.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the invention
With clear spirit and scope. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (17)
1. A defrosting method of an air conditioner is characterized by comprising the following steps:
when the air conditioner operates in a heating mode, acquiring a second temperature of an air inlet of the outdoor heat exchanger and a first humidity of a refrigerant outlet of the outdoor heat exchanger;
determining a current frosting interval where the air conditioner is located according to the second temperature and the first humidity, identifying that the air conditioner is in a frosting state according to the frosting interval, and detecting the air conditioning capacity of the air conditioner within a preset time length;
judging whether the current frosting speed of the air conditioner exceeds a preset frosting speed or not according to the detected air conditioner capacity;
when the current frosting speed exceeds the preset frosting speed, controlling the air conditioner to enter a defrosting process,
a first temperature sensor, a second temperature sensor, a third temperature sensor and a first humidity sensor are arranged on an outdoor heat exchanger of the air conditioner; the first temperature sensor and the first humidity sensor are arranged at a refrigerant outlet of the outdoor heat exchanger, and the second temperature sensor is arranged at an air inlet of the outdoor heat exchanger; the third temperature sensor is disposed at an air outlet of the air conditioner, the method further comprising:
acquiring a second temperature of the second temperature sensor and a first humidity of the first humidity sensor;
before the obtaining of the second temperature sensor and the first humidity of the first humidity sensor, the method further includes:
acquiring a first temperature of the first temperature sensor and a third temperature of the third temperature sensor;
judging whether the first temperature is lower than a preset temperature threshold value or not;
judging whether the third temperature is in a first temperature range or not;
and if the first temperature is lower than a preset temperature threshold value and the third temperature is in the first temperature range, triggering to acquire the second temperature of the second temperature sensor and the first humidity of the first humidity sensor.
2. The defrosting method of an air conditioner according to claim 1, before the detecting the air conditioning capacity of the air conditioner for a preset time period, further comprising:
and adjusting the operating frequency of the air conditioner compressor according to the current frosting interval, and controlling the air conditioner to operate at a preset interval.
3. The defrosting method of an air conditioner according to claim 1, wherein the determining whether the current frosting speed of the air conditioner exceeds a preset frosting speed according to the detected air conditioner capacity comprises:
judging whether the air conditioning capacity is attenuating or not according to the air conditioning capacity at any adjacent time within the preset time length;
if the air conditioning capacity is attenuating, acquiring the attenuation rate of the air conditioning capacity at the current moment;
and comparing the attenuation rate of the current moment with an attenuation rate threshold, and if the attenuation rate of the current moment is greater than the attenuation rate threshold, determining that the current frosting speed exceeds the preset frosting speed.
4. The defrosting method of an air conditioner according to claim 3, wherein before comparing the decay rate of the current time with a decay rate threshold, further comprising:
and acquiring the attenuation rate threshold of the air conditioner according to the type of the air conditioner.
5. The defrosting method of an air conditioner according to claim 3, wherein the judging whether the air conditioning capacity is attenuating according to the air conditioning capacity at any adjacent time within the preset time period comprises:
and continuously comparing the air conditioning capacity at the adjacent moments, and determining that the air conditioning capacity is attenuating if the air conditioning capacity at the previous moment is higher than the air conditioning capacity at the later moment.
6. The defrosting method of an air conditioner according to claim 5, wherein the obtaining of the rate of decay of the air conditioning capacity at the current time comprises:
obtaining the attenuation values of the air conditioning capacity at the current moment and the air conditioning capacity at the previous moment;
and obtaining the attenuation rate of the current moment according to the difference value between the attenuation value and the attenuation value of the previous moment.
7. The defrosting method of an air conditioner according to any one of claims 1 to 6, further comprising, after the controlling the air conditioner to enter a defrosting process:
detecting the temperature of a temperature detection point on the air conditioner, judging whether the air conditioner needs to exit the defrosting process or not according to the temperature, and controlling the air conditioner to exit the defrosting process when the air conditioner needs to exit the defrosting process; alternatively, the first and second electrodes may be,
and detecting the change of the air conditioner capacity, judging whether the defrosting process needs to be exited or not according to the change of the air conditioner capacity, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited.
8. The defrosting device of the air conditioner is characterized in that the air conditioner runs in a heating mode, and a first temperature sensor, a second temperature sensor, a third temperature sensor and a first humidity sensor are arranged on the air conditioner; the first temperature sensor and the first humidity sensor are arranged at a refrigerant outlet of the outdoor heat exchanger, and the second temperature sensor is arranged at an air inlet of the outdoor heat exchanger; the third temperature sensor is arranged at an air outlet of the air conditioner;
the defrosting device of the air conditioner includes:
the acquisition module is used for acquiring a second temperature of the second temperature sensor and a first humidity of the first humidity sensor;
the interval determining module is used for determining the current frosting interval of the air conditioner according to the second temperature and the first humidity;
the detection module is used for detecting the air conditioning capacity of the air conditioner within a preset time length when the current frosting interval indicates that the air conditioner is in a frosting state;
the judging module is used for judging whether the current frosting speed of the air conditioner exceeds a preset frosting speed or not according to the detected air conditioner capacity;
the control module is used for controlling the air conditioner to enter a defrosting process when the current defrosting speed exceeds a preset defrosting speed;
the obtaining module is specifically configured to:
acquiring a first temperature of the first temperature sensor and a third temperature of the third temperature sensor;
judging whether the first temperature is lower than a preset temperature threshold value or not;
judging whether the third temperature is in a first temperature range or not;
and if the first temperature is lower than a preset temperature threshold value and the third temperature is in the first temperature range, triggering to acquire the second temperature of the second temperature sensor and the first humidity of the first humidity sensor.
9. The defrosting apparatus of an air conditioner according to claim 8, wherein the control module is specifically configured to:
and adjusting the operating frequency of the air conditioner compressor according to the current frosting interval, and controlling the air conditioner to operate at a preset interval.
10. The defrosting device of an air conditioner according to claim 8, wherein the judging module specifically includes:
the judging unit is used for judging whether the air conditioning capacity is attenuating or not according to the air conditioning capacity at any adjacent moment in the preset time length;
the acquiring unit is used for acquiring the attenuation rate of the air conditioning capacity at the current moment when the air conditioning capacity is attenuating;
and the determining unit is used for comparing the attenuation rate at the current moment with an attenuation rate threshold, and if the attenuation rate at the current moment is greater than the attenuation rate threshold, determining that the current frosting speed degree of the air conditioner exceeds the preset frosting speed degree.
11. The defrosting apparatus of an air conditioner according to claim 10, wherein the determining unit is further configured to:
and before comparing the attenuation rate of the current moment with an attenuation rate threshold, acquiring the attenuation rate threshold of the air conditioner according to the type of the air conditioner.
12. The defrosting apparatus of an air conditioner according to claim 10, wherein the judging unit is further configured to:
and continuously comparing the air conditioning capacity at the adjacent moments, and determining that the air conditioning capacity is attenuating if the air conditioning capacity at the previous moment is higher than the air conditioning capacity at the later moment.
13. The defrosting apparatus of an air conditioner according to claim 12, wherein the obtaining unit is specifically configured to:
obtaining the attenuation values of the air conditioning capacity at the current moment and the air conditioning capacity at the previous moment;
and obtaining the attenuation rate of the current moment according to the difference value between the attenuation value and the attenuation value of the previous moment.
14. The defrosting apparatus of an air conditioner according to any one of claims 8 to 13, further comprising:
the defrosting monitoring module is used for detecting the temperature of a temperature detection point on the air conditioner after the air conditioner is controlled to enter defrosting, judging whether the air conditioner needs to exit a defrosting process according to the temperature, and controlling the air conditioner to exit the defrosting process when the air conditioner is judged to exit the defrosting process; or detecting the change of the air conditioner capacity, judging whether the defrosting process needs to be exited or not according to the change of the air conditioner capacity, and controlling the air conditioner to exit the defrosting process when the defrosting process needs to be exited.
15. An air conditioner, comprising: the defrosting apparatus of an air conditioner as claimed in any one of claims 8 to 14.
16. An electronic device comprising a memory, a processor;
wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the defrosting method of the air conditioner as set forth in any one of claims 1 to 7.
17. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements a defrosting method of an air conditioner according to any one of claims 1 to 7.
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| CN112050353B (en) * | 2019-06-06 | 2022-09-09 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112539515A (en) * | 2019-09-20 | 2021-03-23 | 青岛海尔空调器有限总公司 | Method and device for defrosting of air conditioner and air conditioner |
| CN112212468B (en) * | 2020-09-14 | 2021-12-14 | 海信（山东）空调有限公司 | Control method of air conditioner |
| CN113587485B (en) * | 2021-07-30 | 2023-03-24 | 美的集团武汉暖通设备有限公司 | Method for acquiring installation position of temperature detection device, air conditioner and storage medium |
| CN114216213B (en) * | 2021-12-10 | 2022-11-11 | 珠海格力电器股份有限公司 | Defrosting control method of air conditioner and air conditioner |
| CN114608144A (en) * | 2022-03-04 | 2022-06-10 | 宁波奥克斯电气股份有限公司 | Outdoor unit defrosting detection method and device and air conditioner |
| CN114893866B (en) * | 2022-06-21 | 2023-07-21 | 珠海格力电器股份有限公司 | Defrosting control method and device and air conditioner |
| CN115289731A (en) * | 2022-08-05 | 2022-11-04 | 珠海格力电器股份有限公司 | Defrosting control method and device and heat pump unit |
| CN115451528A (en) * | 2022-09-26 | 2022-12-09 | 宁波奥克斯电气股份有限公司 | Defrosting control method, control device and air conditioner heat exchange system |
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