CN110469991B - Control method and device for defrosting of air conditioner and air conditioner - Google Patents
Control method and device for defrosting of air conditioner and air conditioner Download PDFInfo
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- 238000010257 thawing Methods 0.000 title claims abstract description 114
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- 230000008569 process Effects 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims description 40
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- 238000010168 coupling process Methods 0.000 description 3
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- 238000007791 dehumidification Methods 0.000 description 3
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- 238000005485 electric heating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient temperatures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application relates to the technical field of air conditioner defrosting, and discloses a control method for air conditioner defrosting. The control method comprises the following steps: in the process of the air conditioner running heating mode, the indoor air inlet temperature of an indoor unit, the indoor coil temperature and the upper shell temperature of an outdoor heat exchanger are obtained; and after the condition of meeting the defrosting entrance condition is determined according to the indoor air inlet temperature, the indoor coil temperature and the upper shell temperature, adjusting one or two of an outdoor fan and an indoor fan of the air conditioner to the corresponding defrosting operation rotating speed. The control method can judge whether the air conditioner meets defrosting entry conditions according to the obtained indoor air inlet temperature, the obtained indoor coil temperature and the obtained upper shell temperature of the outdoor heat exchanger, and improves the control precision of controlling the air conditioner to defrost; and the aggravation influence of the temperature environment on the frost condensation degree of the outdoor heat exchanger is reduced by adjusting the rotating speeds of the indoor fan and the outdoor fan. The application also discloses a controlling means and air conditioner for the air conditioner defrosting.
Description
Technical Field
The application relates to the technical field of air conditioner defrosting, for example, to a control method and device for air conditioner defrosting and an air conditioner.
Background
At present, most of main flow machine types of air conditioners have a heat exchange function of a refrigeration and refrigeration double mode, and here, under a low-temperature area or a climate condition with large wind and snow, a user generally adjusts the air conditioner to a heating mode so as to utilize the air conditioner to increase the temperature of an indoor environment; in the operation and heating process of the air conditioner, the outdoor heat exchanger of the outdoor unit plays a role of an evaporator absorbing heat from the outdoor environment, and is affected by the temperature and the humidity of the outdoor environment, more frost is easily condensed on the outdoor heat exchanger, and the heating capacity of the air conditioner is lower and lower when the frost is condensed to a certain thickness, so that the outdoor heat exchanger needs to be defrosted in order to ensure the heating effect and avoid excessive frost condensation.
Here, the defrosting of the outdoor heat exchanger is mainly performed in the following ways: firstly, reverse cycle defrosting is carried out, when the air conditioner carries out reverse cycle defrosting, a high-temperature refrigerant discharged by a compressor firstly flows through an outdoor heat exchanger so as to melt frost by using the heat of the refrigerant; secondly, an electric heating device is added on a refrigerant pipeline of the air conditioner, the electric heating device is used for heating the refrigerant flowing into the outdoor heat exchanger, and then the heat of the refrigerant is used for melting the frost condensed on the outdoor heat exchanger; and thirdly, adjusting the operation parameters of the air-conditioning components such as the compressor, the electronic expansion valve and the like to change the temperature and the pressure state of the refrigerant in the refrigerant pipeline, so that the refrigerant pipeline can also have the function of defrosting the outdoor heat exchanger.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
because the defrosting process of the defrosting mode of the outdoor heat exchanger shown in the embodiment has more or less influence on the normal heating performance of the air conditioner, the air conditioner carries out defrosting judgment before defrosting, and then controls whether the air conditioner carries out defrosting according to the judgment result; in the related art, defrosting judgment is generally performed by comparing numerical values between outdoor environment temperature and frost point temperature, and because a frosting device of an outdoor heat exchanger is influenced by various factors such as outdoor environment, self running state and the like, the defrosting judgment mode is too rough, and the requirement of an air conditioner for accurately triggering defrosting action is difficult to meet.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and device for air conditioner defrosting and an air conditioner, and aims to solve the technical problem of low air conditioner defrosting judgment accuracy in the related art.
In some embodiments, the control method for defrosting an air conditioner includes:
acquiring the indoor air inlet temperature of an indoor unit, the indoor coil temperature and the upper shell temperature of an outdoor heat exchanger in the process of the air conditioner operation heating mode;
and after the condition of meeting the defrosting entrance condition is determined according to the indoor air inlet temperature, the indoor coil temperature and the upper shell temperature, adjusting one or two of an outdoor fan and an indoor fan of the air conditioner to the corresponding defrosting operation rotating speed.
In some embodiments, the apparatus for defrosting an air conditioner includes:
a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, perform a control method for air conditioner defrosting as described in some embodiments above.
In some embodiments, the air conditioner includes:
the refrigerant circulating loop is formed by connecting an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor through refrigerant pipelines;
an indoor fan configured to drive an indoor airflow in heat exchange with the indoor heat exchanger;
an outdoor fan configured to drive an outdoor airflow to exchange heat with the outdoor heat exchanger;
the control device for defrosting the air conditioner in some embodiments is electrically connected with the indoor fan and the outdoor fan.
The control method and device for defrosting of the air conditioner and the air conditioner provided by the embodiment of the disclosure can achieve the following technical effects:
the control method for defrosting the air conditioner can comprehensively judge whether the air conditioner meets defrosting entry conditions according to the acquired parameters of the indoor air inlet temperature, the indoor coil temperature and the upper shell temperature of the outdoor heat exchanger, so that the control precision of controlling the air conditioner to defrost can be effectively improved; the heat exchange rates of the heat exchangers corresponding to the indoor fan and the outdoor fan and the external environment are changed through adjusting the rotating speed of the indoor fan and the rotating speed of the outdoor fan, so that the temperature and the pressure of the refrigerant in the refrigerant circulation loop can be adjusted, the refrigerant which finally flows into the outdoor heat exchanger for defrosting can achieve a good defrosting effect, the temperature environment around the outdoor heat exchanger can be improved, and the aggravation influence of the temperature environment on the defrosting degree of the outdoor heat exchanger is reduced.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic flowchart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a control method for defrosting an air conditioner according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control device for defrosting of an air conditioner according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
Fig. 1 is a schematic flow chart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure.
As shown in fig. 1, an embodiment of the present disclosure provides a control method for defrosting an air conditioner, which can be used to solve the problem that when the air conditioner operates in rain and snow or under low-temperature and severe cold conditions, an outdoor heat exchanger frosts and affects the normal heating performance of the air conditioner; in an embodiment, the main flow steps of the control method include:
s101, in the process of an air conditioner running heating mode, acquiring the indoor air inlet temperature of an indoor unit, the indoor coil temperature and the upper shell temperature of an outdoor heat exchanger;
in an embodiment, when the outdoor heat exchanger of the outdoor unit of the air conditioner has a frosting problem, the outdoor environment is mostly in a severe working condition with a low temperature and a high humidity, and at this time, a user generally sets the air conditioner to operate in a heating mode so as to heat and raise the temperature of the indoor environment by using the air conditioner. Therefore, the control method for defrosting the air conditioner provided by the embodiment of the disclosure is a control flow which is started when the air conditioner operates in a heating mode.
When the air conditioner operates in other modes such as a cooling mode and a dehumidification mode, because the problem of frosting of the outdoor unit of the air conditioner generally does not occur under the outdoor working conditions corresponding to the modes, optionally, when the air conditioner operates in other non-heating modes, the flow control process corresponding to the control method is not started, so that the situation that the defrosting action aiming at the outdoor heat exchanger is mistakenly triggered in the modes such as the cooling mode and the dehumidification mode of the air conditioner is avoided, and the normal cooling or dehumidification working process of the air conditioner is influenced is avoided.
In an optional embodiment, the indoor unit of the air conditioner is provided with a first temperature sensor, and the first temperature sensor can be used for detecting the inlet air temperature of the inlet air flow of the indoor unit in real time; therefore, the indoor intake air temperature obtained in step S101 may be the real-time temperature of the indoor unit intake air flow detected by the first temperature sensor;
optionally, the first temperature sensor is disposed on an air outlet grille of an air inlet of the indoor unit or an air inlet duct, so that the first temperature sensor is located on an air outlet path of an air inlet flow of the indoor unit, thereby improving detection accuracy of indoor air temperature.
In addition, the indoor unit of the air conditioner is provided with a second temperature sensor which can be used for detecting the real-time temperature of the position of the coil of the indoor heat exchanger of the indoor unit; therefore, the indoor coil temperature obtained in step S101 may be the real-time temperature at the coil-entering position of the indoor unit detected by the second temperature sensor;
in the embodiment of the disclosure, when the outdoor environment is severe, the low temperature of the outdoor environment affects the heating performance of the air conditioner and the temperature of the indoor environment, so that the heating performance of the air conditioner is reduced, the temperature of the refrigerant flowing into the indoor heat exchanger is reduced, and the indoor environment is reduced; the influence of outdoor environment change on the heating performance of the air conditioner is more obvious, so that the severity of the outdoor environment can be judged according to the change condition of the temperature difference between the temperature of the indoor coil and the temperature of indoor inlet air, and whether the outdoor heat exchanger has the problem of frost condensation is judged; the obtained indoor air inlet temperature and the indoor coil temperature can be used as reference factors for measuring the frosting degree of the outdoor heat exchanger.
In an alternative embodiment, the outdoor unit of the air conditioner is further provided with a third temperature sensor, and the third temperature sensor can be used for detecting the real-time temperature of the refrigerant pipeline flowing through the upper shell or the upper part of the outdoor heat exchanger; therefore, the upper case temperature acquired in step S101 may be a real-time temperature detected by the third temperature sensor;
in this embodiment, the refrigerant liquid inlet pipeline of the outdoor heat exchanger is disposed at the lower portion, and the refrigerant liquid outlet pipeline of the outdoor heat exchanger is disposed at the upper portion, so that the refrigerant flows into the outdoor heat exchanger from the lower portion and flows out of the outdoor heat exchanger from the upper portion in the heating mode; therefore, the temperature of the upper shell is influenced by the temperature of the refrigerant which flows through most pipelines of the outdoor heat exchanger and exchanges heat with the outdoor environment, and the heat exchange efficiency of the refrigerant under different frosting conditions can be reflected; under the condition that the air conditioner is not frosted, the refrigerant absorbs more heat from the outdoor environment, so the temperature of the upper shell influenced by the refrigerant is higher; in the case of frost formation in the air conditioner, the refrigerant absorbs less heat from the outdoor environment, and therefore the upper casing temperature is also lower. Therefore, compared with the temperature of the outdoor coil pipe at the lower part of the outdoor heat exchanger, the temperature of the upper shell of the outdoor heat exchanger can more accurately reflect the frosting degree of the outdoor heat exchanger.
S102, after the condition of meeting the defrosting entrance is determined according to the indoor air inlet temperature, the indoor coil temperature and the upper shell temperature, one or two of an outdoor fan and an indoor fan of the air conditioner are adjusted to the corresponding defrosting operation rotating speed.
The air conditioner is preset with a defrosting entry condition, and whether the air conditioner meets the defrosting entry condition can be judged according to the acquired parameters when the air conditioner operates in a heating mode; if so, the air conditioner needs to defrost the outdoor heat exchanger; if not, the air conditioner does not need to defrost the outdoor heat exchanger.
In the embodiment of the present disclosure, the air conditioner determines whether the defrosting entry condition is satisfied according to the three parameters of the indoor air inlet temperature of the indoor unit, the indoor coil temperature, and the upper casing temperature of the outdoor heat exchanger, which are obtained in step S101; therefore, the embodiment of the disclosure integrates the three factor parameters to judge whether the air conditioner has the frosting problem, and can greatly improve the judgment precision of the air conditioner defrosting, so that the defrosting operation triggered by the air conditioner can better accord with the real-time frosting condition of the air conditioner.
In an alternative embodiment, the defrost entry condition in step S102 includes:
△Tmax-△T≥△T1，Tupper casing max-TUpper shell≥△T2；
Wherein, Delta TmaxThe maximum difference between the indoor coil temperature and the outdoor air outlet temperature recorded after the air conditioner is started up and operated at this time, delta T is the heat exchange temperature difference between the indoor coil temperature and the outdoor air outlet temperature, TUpper casing maxThe maximum value of the temperature of the upper shell, T, of the outdoor heat exchanger recorded after the air conditioner is started up and operated at this timeUpper shellThe temperature of the upper shell of the outdoor heat exchanger is shown, the delta T1 is a preset first temperature difference threshold value, and the delta T2 is a preset second temperature difference threshold value.
In the defrosting entering condition, the indoor heat exchange efficiency under different frosting conditions can be reflected by the maximum difference between the indoor coil temperature and the indoor air inlet temperature and the temperature difference between the heat exchange temperature difference between the indoor coil temperature and the indoor air inlet temperature; for example, in the case of no frosting of the air conditioner, the temperature of the indoor coil and the temperature of the indoor inlet air are both high, so delta TmaxThe temperature control device can be generally used for indicating the difference upper limit of the indoor coil temperature and the indoor inlet air temperature under the condition that the air conditioner is not frosted; under the condition that the air conditioner is frosted, the influence of the outdoor environment on the air conditioner is more obvious, so that the difference between the temperature of the indoor coil and the indoor inlet air temperature is increased and is more than the difference upper limit under the previous non-frosting condition. Like this, one of the defrosting admission condition of this application is according to the temperature variation speed of indoor air inlet temperature under the different outdoor operating mode promptly and judges that defrosting.
Optionally, Δ TmaxThe maximum difference between the indoor coil temperature and the indoor inlet air temperature recorded in the set time of the air conditioner starting operation is generally adopted, and the frosting problem does not occur in the set time of the air conditioner starting operation, such as 5 minutes, 10 minutes and the like; namely, the maximum difference is the upper limit of the difference when the air conditioner has no frosting problem;
or, Delta TmaxOr the numerical value obtained by simulation experiment data of the air conditioner running at different temperatures before the air conditioner product leaves the factory.
In addition, the maximum value of the upper shell temperature of the outdoor heat exchanger and the upper shell temperature of the outdoor heat exchanger, which are recorded after the air conditioner is started and operated at this time, can reflect the heat absorption efficiency of the refrigerant in the outdoor heat exchanger under different frosting conditions, so that the maximum value of the upper shell temperature of the outdoor heat exchanger and the upper shell temperature of the outdoor heat exchanger can also be used as parameters for judging the frosting degree of the air conditioner.
Therefore, the defrosting entry condition in the embodiment of the disclosure comprehensively considers the influence of the parameters on the frosting of the outdoor heat exchanger under different working conditions, so that the judgment precision of the air conditioner defrosting can be effectively improved, and the problems of misjudgment, mistriggering and the like are reduced.
In the embodiment of the present disclosure, after it is determined that the defrosting entry condition is satisfied according to the indoor intake air temperature, the indoor coil temperature, and the upper case temperature, the defrosting operation of the air conditioner includes: and adjusting one or two of an outdoor fan and an indoor fan of the air conditioner to the corresponding defrosting operation rotating speed.
In the embodiment, by adjusting one or two of the outdoor fan and the indoor fan to the corresponding defrosting operation rotating speed, the heat exchange rate between the heat exchanger corresponding to the refrigerant and the surrounding environment can be changed, and the aim of defrosting and defrosting by utilizing the heat of the refrigerant is further fulfilled; for example, by reducing the rotating speed of an indoor fan of the air conditioner, the heat exchange rate between the indoor heat exchanger and the indoor environment can be reduced, so that the refrigerant flowing into the outdoor heat exchanger after flowing out of the indoor heat exchanger can retain more heat, the defrosting effect of the outdoor heat exchanger by using the heat of the refrigerant can be improved, and the running power consumption of the heating device for heating the refrigerant can be reduced; or, by shutting down the outdoor fan, the heat exchange rate between the outdoor heat exchanger and the outdoor environment can be reduced, the adverse temperature influence of the low-temperature condition of the outdoor environment on the frosting of the outdoor heat exchanger is reduced, and the heat dissipation of the refrigerant heat for defrosting is reduced, so that the actual defrosting effect in the defrosting process is ensured.
After the air conditioner is removed from defrosting, the running rotating speeds of the outdoor fan and the indoor fan of the air conditioner can be controlled to be recovered so as to meet the air volume requirement of normal heating operation of the air conditioner after the air conditioner is removed from defrosting.
In some alternative embodiments, the defrost operating speed is determined based on the temperature difference or the indoor coil temperature.
Wherein the temperature difference comprises: a first temperature difference between the maximum difference and the heat exchange temperature difference, or a second temperature difference between the maximum upper shell temperature and the upper shell temperature.
Optionally, determining the defrosting operation speed according to the temperature difference includes: and acquiring a corresponding first outer fan rotating speed and/or a first inner fan rotating speed from the first association relation according to the first temperature difference so as to adjust the outdoor fan according to the first outer fan rotating speed and adjust the indoor fan according to the first inner fan rotating speed.
Here, the first association relationship includes a correspondence relationship between one or more first temperature difference values and a rotation speed of the first outer fan, and/or a correspondence relationship between one or more first temperature difference values and a rotation speed of the first inner fan. For example, an alternative first temperature difference value versus first outer fan speed and first inner fan speed is shown in table 1, which shows,
| first temperature difference | First outer fan speed | First inner fan rotating speed |
| a1＜△Tmax-△T≤a2 | R11 | r11 |
| a2＜△Tmax-△T≤a3 | R12 | r12 |
| a3＜△Tmax-△T | R13 | r13 |
TABLE 1
In the first association relationship, the first temperature difference value and the rotating speed of the first outer fan are in negative correlation, and the first temperature difference value and the rotating speed of the first inner fan are in negative correlation. Namely, the larger the first temperature difference is, the smaller the rotating speed of the first outer fan is, and the smaller the rotating speed of the first inner fan is; and the smaller the first temperature difference value is, the larger the rotating speed of the first outer fan is, and the larger the rotating speed of the first inner fan is.
Therefore, when the operation rotation speed of the outdoor fan and/or the indoor fan is adjusted in step S102, the first outer fan rotation speed and/or the first inner fan rotation speed corresponding to the first temperature difference may be determined according to the first association relationship, and then the outdoor fan may be adjusted according to the first outer fan rotation speed, and/or the indoor fan may be adjusted according to the first inner fan rotation speed.
Optionally, determining the defrosting operation speed according to the temperature difference includes: and acquiring the corresponding second outer fan rotating speed and/or second inner fan rotating speed from the second incidence relation according to the second temperature difference value so as to adjust the outdoor fan according to the second outer fan rotating speed and adjust the indoor fan according to the second inner fan rotating speed.
Here, the second association relationship includes a correspondence relationship between one or more second temperature difference values and a rotation speed of the second outer fan, and/or a correspondence relationship between one or more second temperature difference values and a rotation speed of the second inner fan. For example, table 2 shows an alternative second temperature difference value corresponding to the second outer fan speed and the second inner fan speed, as shown in the following table,
| second temperature difference | Second outer fan speed | Second inner fan speed |
| b1＜TUpper casing max-TUpper shell≤b2 | R21 | r21 |
| b2＜TUpper casing max-TUpper shell≤b3 | R22 | r22 |
| b3＜TUpper casing max-TUpper shell | R23 | r23 |
TABLE 2
In the second incidence relation, the second temperature difference value and the rotating speed of the second outer fan are in negative correlation, and the second temperature difference value and the rotating speed of the second inner fan are in negative correlation. Namely, the larger the second temperature difference is, the smaller the rotating speed of the second outer fan is, and the smaller the rotating speed of the second inner fan is; and the smaller the second temperature difference value is, the larger the rotating speed of the second outer fan is, and the larger the rotating speed of the second inner fan is.
Therefore, when the operation rotation speed of the outdoor fan and/or the indoor fan is adjusted in step S102, the second outer fan rotation speed and/or the second inner fan rotation speed corresponding to the second temperature difference may be determined according to the second association relationship, and then the outdoor fan may be adjusted according to the second outer fan rotation speed, and/or the indoor fan may be adjusted according to the second inner fan rotation speed.
In some alternative embodiments, determining the defrost operating speed based on the indoor coil temperature comprises: and according to the temperature of the indoor coil, acquiring the corresponding third outer fan rotating speed and/or third inner fan rotating speed from the third correlation, so as to adjust the outdoor fan according to the third outer fan rotating speed and adjust the indoor fan according to the third inner fan rotating speed.
Here, the third correlation includes a correspondence between one or more indoor coil temperatures and a third outer fan rotation speed, and/or a correspondence between one or more indoor coil temperatures and a third inner fan rotation speed. For example, table 3 shows an alternative indoor coil temperature versus third outer fan speed, third inner fan speed, as shown in the following table,
| indoor coil temperature | Third outer fan speed | Third inner fan speed |
| c1＜Tp≤c2 | R31 | r31 |
| c2＜Tp≤c3 | R32 | r32 |
| c3＜Tp | R33 | r33 |
TABLE 3
In the third correlation, the indoor coil temperature and the third outer fan rotation speed are in negative correlation, and the indoor coil temperature and the third inner fan rotation speed are in negative correlation. Namely, the higher the temperature of the indoor coil pipe is, the lower the rotating speed of the third outer fan is and the lower the rotating speed of the third inner fan is; and the smaller the temperature of the indoor coil pipe is, the larger the rotating speed of the third outer fan is, and the larger the rotating speed of the third inner fan is.
Therefore, when the operation rotation speed of the outdoor fan and/or the indoor fan is adjusted in step S102, the third outer fan rotation speed and/or the third inner fan rotation speed corresponding to the temperature of the indoor coil may be determined according to the third correlation, and then the outdoor fan may be adjusted according to the third outer fan rotation speed, and/or the indoor fan may be adjusted according to the third inner fan rotation speed.
In the above embodiment, since the degree of frosting of the outdoor heat exchanger has different influences on the thermal performance of the air conditioner, and further has different influences on the first temperature difference, the second temperature difference and the temperature change of the indoor coil temperature, the air conditioner is provided with a separate association relationship respectively, and the air conditioner can select one of the association relationships to determine the corresponding heating rate according to actual needs.
Optionally, the specifically selected association relationship may also be determined according to the heating requirement of the current user, for example, when the heating requirement of the current user is low, the second association relationship is selected, and at this time, the influence of the outdoor unit parameters such as the upper casing temperature corresponding to the second temperature difference value on the defrosting effect is mainly considered; and when the heating demand of the current user is higher, the first association relation and the third association relation are selected, and the change condition of the heat exchange efficiency of the refrigerant between the indoor heat exchanger and the indoor environment caused by the influence of the frosting of the outdoor heat exchanger is mainly considered at the moment so as to ensure the heating performance.
Here, the heating demand of the current user may be determined by setting a target heating temperature for the air conditioner; for example, a heating temperature threshold is preset in the air conditioner, and when the target heating temperature actually set by the user is smaller than the heating temperature threshold, it indicates that the heating demand of the user is low at this time; and when the target heating temperature actually set by the user is greater than or equal to the heating temperature threshold, the heating requirement of the user is high or low at the moment.
Like this, in this embodiment of the disclosure not only can be according to the actual defrosting condition of air conditioner in time trigger the defrosting operation of air conditioner to outdoor heat exchanger, can also take into account user's requirement of heating when carrying out the defrosting operation to indoor fan and outdoor fan simultaneously to fully guarantee the air conditioner in the defrosting in-process to the control requirement of user's comfort level.
Fig. 2 is a flowchart illustrating a control method for defrosting an air conditioner according to another embodiment of the present disclosure.
As shown in fig. 2, the embodiment of the present disclosure provides another control method for defrosting an air conditioner, and the control steps mainly include:
s201, starting an air conditioner and operating in a heating mode;
in this embodiment, a general user of the air conditioner sets the heating mode to be the current mode for starting up operation under the condition of low temperature and severe cold weather.
S202, detecting indoor air inlet temperature T of indoor unitAir intakeIndoor coil temperature TpAnd the upper shell temperature T of the outdoor heat exchangerUpper shell；
S203, judging whether delta T existsmax-△T≥△T1，TUpper casing max-TUpper shellΔ T2, if yes, executing step S204, if no, returning to execute step S202;
in the disclosed embodiment, Δ Tmax-△T≥△T1，TUpper casing max-TUpper shellΔ T2 together constitute the preset defrost entry condition.
After the air conditioner is started to operate, the temperature sensor detects the temperature of the upper shell in real time, and the detected temperatures of the plurality of upper shells are used as historical data to be stored; therefore, when the determination step of step S203 is executed, a plurality of upper casing temperatures in the history data may be retrieved, and the maximum value T of the upper casing temperature may be determined by comparisonUpper casing max；
If the defrosting entry condition is met, the problem that the outdoor heat exchanger of the air conditioner frosts at the moment is solved; and if the defrosting entering condition is not met, the problem that the outdoor heat exchanger of the air conditioner is frosted does not exist at the moment.
S204 according to the delta TmaxAcquiring corresponding first outer fan rotating speed and first inner fan rotating speed from the first association relation;
in the embodiment of the present disclosure, reference may be made to the foregoing embodiment for a specific implementation manner of step S204, which is not described herein again.
S205, adjusting the outdoor fan according to the rotating speed of the first outer fan, and adjusting the indoor fan according to the rotating speed of the first inner fan; the flow ends.
The control method for defrosting the air conditioner can comprehensively judge whether the air conditioner meets defrosting entry conditions according to the acquired parameters of the indoor air inlet temperature, the indoor coil temperature and the upper shell temperature of the outdoor heat exchanger, so that the control precision of controlling the air conditioner to defrost can be effectively improved; the heat exchange rates of the heat exchangers corresponding to the indoor fan and the outdoor fan and the external environment are changed through adjusting the rotating speed of the indoor fan and the rotating speed of the outdoor fan, so that the temperature and the pressure of the refrigerant in the refrigerant circulation loop can be adjusted, the refrigerant which finally flows into the outdoor heat exchanger for defrosting can achieve a good defrosting effect, the temperature environment around the outdoor heat exchanger can be improved, and the aggravation influence of the temperature environment on the defrosting degree of the outdoor heat exchanger is reduced.
In some optional embodiments, after adjusting one or both of the outdoor fan and the indoor fan of the air conditioner to the corresponding defrosting operation rotation speed, the method further includes: acquiring state parameters in the process of operating a heating mode of an air conditioner; and after the condition that the defrosting exit condition is met is determined according to the state parameters, the defrosting operation rotating speed is exited.
Here, after the defrosting operation rotation speed is exited, the indoor fan and/or the outdoor fan is controlled to switch to the heating operation rotation speed.
Here, the state parameters during the air conditioner operation heating mode are at least one or more of the following parameter types: outdoor environment temperature, refrigerant inlet temperature, refrigerant outlet temperature and outdoor coil temperature. It should be understood that the status parameters obtained in the present application are not limited to the types of parameters shown in the above embodiments.
Correspondingly, the defrosting exit condition is preset according to the specifically obtained parameter type, generally, when the air conditioner meets the defrosting exit condition, the defrosting of the outdoor heat exchanger is finished, no frost or only a small amount of frost exists on the outdoor heat exchanger, and the influence on the normal heating performance of the air conditioner is low; for example, when the parameter type is the outdoor ambient temperature, an optional defrost exit condition is that the outdoor ambient temperature is greater than or equal to a preset outer loop temperature threshold.
Judging whether the defrosting exit condition is met or not according to the outdoor environment temperature after the outdoor environment temperature is obtained; if so, controlling and recovering the heating operation rotating speed of the indoor fan and/or the outdoor fan; if not, the current operation state is maintained unchanged.
In the embodiment of the disclosure, in the process of controlling the adjustment of the operating speed of the indoor fan and/or the outdoor fan, the air conditioner performs the judgment operation on the defrosting exit condition in real time according to the parameters of the air conditioner, so as to stop the indoor fan and/or the outdoor fan from operating at the defrosting operating speed under the condition that the defrosting exit condition is met, and thus the operating speed of the air conditioner in the normal heating state can be timely switched back, so as to reduce the influence of the defrosting operation on the normal heating work of the air conditioner.
Fig. 3 is a schematic structural diagram of a control device for defrosting of an air conditioner according to an embodiment of the present disclosure.
The embodiment of the present disclosure provides a control device for defrosting of an air conditioner, which is structurally shown in fig. 3 and includes:
a processor (processor)300 and a memory (memory)301, and may further include a Communication Interface 302 and a bus 303. The processor 300, the communication interface 302 and the memory 301 may communicate with each other via a bus 303. The communication interface 302 may be used for information transfer. The processor 300 may call logic instructions in the memory 301 to perform the control method for defrosting the air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 301 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 301 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 300 executes functional applications and data processing by executing program instructions/modules stored in the memory 301, that is, implements the control method for defrosting an air conditioner in the above-described method embodiment.
The memory 301 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 301 may include a high-speed random access memory, and may also include a nonvolatile memory.
The disclosed implementation also provides an air conditioner, including:
the refrigerant circulating loop is formed by connecting an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor through refrigerant pipelines;
an indoor fan configured to drive an indoor airflow to exchange heat with the indoor heat exchanger;
an outdoor fan configured to drive an outdoor airflow to exchange heat with the outdoor heat exchanger;
and the control device for defrosting of the air conditioner is electrically connected with the indoor fan and the outdoor fan. Here, the control device for air conditioner defrosting is the control device shown in the foregoing embodiment.
The air conditioner in the embodiment of the disclosure can accurately detect and judge whether the air conditioner has the frosting problem, and under the condition that the frosting problem exists in the air conditioner, the control device, the indoor fan and the outdoor fan are utilized to perform corresponding defrosting operation, so that the amount of frost condensed on an outdoor heat exchanger of the air conditioner is reduced, the air conditioner can be ensured to normally heat an indoor environment under the low-temperature severe cold climate condition, and the use experience of a user is improved.
Embodiments of the present disclosure also provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for defrosting an air conditioner.
Embodiments of the present disclosure also provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described method for defrosting an air conditioner.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, 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. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (8)
1. A control method for defrosting of an air conditioner is characterized by comprising the following steps:
acquiring the indoor air inlet temperature of an indoor unit, the indoor coil temperature and the upper shell temperature of an outdoor heat exchanger in the process of the air conditioner operation heating mode;
after determining that the defrosting entry condition is met according to the indoor air inlet temperature, the indoor coil temperature and the upper shell temperature, adjusting one or two of an outdoor fan and an indoor fan of the air conditioner to the corresponding defrosting operation rotating speed;
wherein the defrost entry conditions include:
△Tmax-△T≥△T1，Tupper casing max-TUpper shell≥△T2；
Wherein, Delta TmaxThe maximum difference between the indoor coil temperature and the indoor air inlet temperature recorded after the air conditioner is started up and operated at this time, delta T is the heat exchange temperature difference between the indoor coil temperature and the indoor air inlet temperature, and T is the temperature difference between the indoor coil temperature and the indoor air inlet temperatureUpper casing maxThe maximum value of the temperature of the upper shell, T, of the outdoor heat exchanger recorded after the air conditioner is started up and operated at this timeUpper shellThe temperature of an upper shell of the outdoor heat exchanger is shown, delta T1 is a preset first temperature difference threshold value, and delta T2 is a preset second temperature difference threshold value;
the defrosting operation rotating speed is determined according to the temperature difference or the indoor coil temperature and a preset incidence relation; wherein the temperature difference comprises: a first temperature difference between the maximum difference and the heat exchange temperature difference, or a second temperature difference between the maximum upper shell temperature and the upper shell temperature; the preset association relationship is one selected from a first association relationship, a second association relationship and a third association relationship according to the heating requirement of the current user; the first correlation is the corresponding relation between a first temperature difference value and the rotating speed of a first outer fan and the rotating speed of a first inner fan, and the second correlation is the corresponding relation between a second temperature difference value and the rotating speed of a second outer fan and the rotating speed of a second inner fan; the third relation is the corresponding relation between the temperature of the indoor coil pipe and the rotating speed of the third outer fan and the rotating speed of the third inner fan.
2. The control method of claim 1, wherein determining the defrost operating speed based on the temperature difference comprises:
acquiring a corresponding first outer fan rotating speed and/or a first inner fan rotating speed from a first incidence relation according to the first temperature difference, so as to adjust the outdoor fan according to the first outer fan rotating speed and adjust the indoor fan according to the first inner fan rotating speed;
and acquiring a corresponding second outer fan rotating speed and/or a second outer fan rotating speed from a second incidence relation according to the second temperature difference value, so as to adjust the outdoor fan according to the second outer fan rotating speed and adjust the indoor fan according to the second inner fan rotating speed.
3. The control method according to claim 2, wherein in the first correlation, the first temperature difference value is negatively correlated with the first outer fan rotation speed, and the first temperature difference value is negatively correlated with the first inner fan rotation speed;
in the second incidence relation, the second temperature difference value and the second outer fan rotating speed are in negative correlation, and the second temperature difference value and the second inner fan rotating speed are in negative correlation.
4. The control method of claim 1, wherein determining the defrost operating speed based on an indoor coil temperature comprises:
and acquiring a corresponding third outer fan rotating speed and/or a third inner fan rotating speed from a third correlation according to the indoor coil temperature, so as to adjust the outdoor fan according to the third outer fan rotating speed and adjust the indoor fan according to the third inner fan rotating speed.
5. The control method of claim 4, wherein the third correlation relates the indoor coil temperature negatively to the third outer and inner fan speeds.
6. The control method according to any one of claims 1 to 5, further comprising, after adjusting an outdoor fan and an indoor fan of the air conditioner to a defrosting operation rotation speed:
acquiring state parameters in the process of operating a heating mode of an air conditioner;
and after the condition that the defrosting exit condition is met is determined according to the state parameters, controlling to exit the defrosting operation rotating speed.
7. A control apparatus for air conditioner defrosting comprising a processor and a memory having stored thereon program instructions, characterized in that the processor is configured to execute the control method for air conditioner defrosting according to any one of claims 1 to 6 when executing the program instructions.
8. An air conditioner, comprising:
the refrigerant circulating loop is formed by connecting an outdoor heat exchanger, an indoor heat exchanger, a throttling device and a compressor through refrigerant pipelines;
an indoor fan configured to drive an indoor airflow in heat exchange with the indoor heat exchanger;
an outdoor fan configured to drive an outdoor airflow to exchange heat with the outdoor heat exchanger;
the control device for defrosting of an air conditioner as set forth in claim 7, electrically connected to said indoor fan and said outdoor fan.
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| CN114251784A (en) * | 2020-09-22 | 2022-03-29 | 广东美的制冷设备有限公司 | Air conditioner and indoor unit control method thereof |
| CN113280472A (en) * | 2021-06-16 | 2021-08-20 | 四川长虹空调有限公司 | Control method of air conditioner heating mode and air conditioning system |
| CN113847707B (en) * | 2021-08-26 | 2022-11-22 | 青岛海尔空调电子有限公司 | Air conditioner defrosting control method and device and air conditioner |
| CN115978718B (en) * | 2022-12-06 | 2024-08-09 | 珠海格力电器股份有限公司 | Defrosting control method and device, electronic equipment and storage medium |
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