CN107906808B - Method and device for controlling defrosting of air conditioner - Google Patents
Method and device for controlling defrosting of air conditioner Download PDFInfo
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- CN107906808B CN107906808B CN201711049795.5A CN201711049795A CN107906808B CN 107906808 B CN107906808 B CN 107906808B CN 201711049795 A CN201711049795 A CN 201711049795A CN 107906808 B CN107906808 B CN 107906808B
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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
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
Abstract
The invention discloses a method for controlling defrosting of an air conditioner, and belongs to the technical field of air conditioners. The method comprises the following steps: acquiring a first temperature variation of the outer coil in a reference defrosting interval duration; determining the defrosting interval compensation time length according to the first temperature variation; and when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length and the defrosting interval compensation time length, controlling the air conditioner to start the defrosting process. The method for controlling the defrosting of the air conditioner determines the time interval between two continuously executed defrosting processes according to the variation of the temperature of the external coil detected by the defrosting sensor, so that the change of the frosting condition of the air conditioner caused by the factors such as the operation of the air conditioner, the external environment and the like can be considered, the time interval between two adjacent defrosting processes can be matched with the actual defrosting requirement, the control is more accurate, and the operation energy efficiency of the air conditioner in severe cold and low temperature weather is ensured.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling defrosting of an air conditioner.
Background
Along with the improvement of living standard of people, air conditioning equipment has also gone into thousands of households, the use of domestic air conditioners and central air conditioners is more and more common, the requirement of users on the comfort level of the air conditioners is more and more high, the problems existing in the use process of the air conditioners are also gradually exposed, and one of the problems is the problem that an outdoor unit of the air conditioner is frosted and frozen when the air conditioner operates in severe cold climate.
When the air conditioner operates in a low-temperature area or an area with large wind and snow, the condensed water flow on the outer surface of the condenser of the outdoor unit can drop on the base plate, the condenser and the base plate of the air conditioner can be frozen under the condition that the air conditioner operates for a long time, the condensed ice layer on the outdoor unit can obstruct the heat exchange between the internal refrigerant and the outdoor environment, the refrigerating efficiency of the air conditioner is reduced, in order to ensure the heating effect of the air conditioner, the air conditioner has to operate with increased power, and the extra consumption of electric energy and the use cost of a user are increased.
Therefore, some conventional air conditioners have a defrosting function to solve the problem of frost and ice formation of an outdoor unit of the air conditioner, for example, heating the outdoor unit by a heating device provided in the outdoor unit, or defrosting and melting ice in an outdoor heat exchanger by a refrigerant discharged from a compressor. Generally, in order to not affect the normal heating operation of the air conditioner, the time for the air conditioner to start the defrosting function is short, and therefore, in order to ensure the defrosting effect of the air conditioner, the air conditioner may perform a defrosting process for a plurality of times. However, due to the influence of various factors such as the change of the operating power of the air conditioner and the change of the outdoor air temperature, the ice layer condensed on the outdoor unit of the air conditioner at different times often has various conditions, so that the conventional manner of starting the defrosting process at a fixed time interval often cannot meet the defrosting requirement of the air conditioner, for example, when the outdoor temperature rises back, the frosting and icing condition of the outdoor unit is slowed down, the influence on the air conditioning heat operation is small, and if the outdoor unit is still defrosted at the fixed time interval, the defrosting frequency is obviously too many, which causes the additional energy consumption and the use cost of the air conditioner to be increased.
Disclosure of Invention
The invention discloses a method and a device for adjusting defrosting control, and aims to solve the problem that a fixed time interval cannot be matched with an actual defrosting requirement when an air conditioner continuously executes a defrosting process. 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 and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to the first aspect of the present invention, there is also provided a method of defrosting control of an air conditioner, including: acquiring a first temperature variation of the outer coil in a reference defrosting interval duration; determining the defrosting interval compensation time length according to the first temperature variation; and when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length and the defrosting interval compensation time length, controlling the air conditioner to start the defrosting process.
In an alternative embodiment, obtaining a first amount of temperature change of the outer coil over a baseline defrost interval duration comprises: acquiring a plurality of temperature values in a set duration within a reference defrosting interval duration, calculating temperature difference values between adjacent sequence of temperature values in the set duration, and determining a temperature difference mean value of the temperature difference values;
determining a defrost interval compensation duration based on the first temperature variation, comprising: and determining the defrosting interval compensation time length according to the comparison result of the temperature difference mean value and the set temperature difference threshold value.
In an alternative embodiment, the determining the defrosting interval compensation duration according to the comparison result of the temperature difference average value and the set temperature difference threshold value comprises: and when the average temperature difference value is larger than the first temperature difference threshold value, determining that the defrosting interval compensation time length is zero.
In an optional embodiment, the determining the defrosting interval compensation duration according to the comparison result between the temperature difference average value and the set temperature difference threshold value further includes: and when the mean temperature difference value is greater than the second temperature difference threshold value and less than or equal to the first temperature difference threshold value, determining the defrosting interval compensation time length as a first compensation time length.
In an optional embodiment, the determining the defrosting interval compensation duration according to the comparison result between the temperature difference average value and the set temperature difference threshold value further includes: when the mean temperature difference value is greater than a third temperature difference threshold value and less than or equal to a second temperature difference threshold value, determining the defrosting interval compensation time length as a second compensation time length; wherein the second compensation duration is greater than the first compensation duration.
In an optional embodiment, the method further comprises: acquiring a second temperature variation detected by the outer coil pipe within the defrosting interval compensation duration; determining the defrosting interval supplement duration according to the second temperature variation; and when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length, the defrosting interval compensation time length and the defrosting interval supplement time length, controlling the air conditioner to start the defrosting process.
According to a second aspect of the present invention, there is also provided an apparatus for defrosting control of an air conditioner, comprising: the first acquisition module is used for acquiring a first temperature variation of the outer coil in the reference defrosting interval duration; the first determining module is used for determining the defrosting interval compensation duration according to the first temperature variation; and the first main control module is used for controlling the air conditioner to start the defrosting process when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length and the defrosting interval compensation time length.
In an optional embodiment, the first obtaining module is specifically configured to: acquiring a plurality of temperature values in a set duration within a reference defrosting interval duration, calculating temperature difference values between adjacent sequence of temperature values in the set duration, and determining a temperature difference mean value of the temperature difference values; the first determining module is specifically configured to: and determining the defrosting interval compensation time according to the comparison result of the temperature difference mean value determined by the first acquisition module and the set temperature difference threshold.
In an alternative embodiment, the first determining module comprises a first determining submodule for: and when the average temperature difference value is larger than the first temperature difference threshold value, determining that the defrosting interval compensation time length is zero.
In an alternative embodiment, the first determination module comprises a second determination submodule for: and when the mean temperature difference value is greater than the second temperature difference threshold value and less than or equal to the first temperature difference threshold value, determining the defrosting interval compensation time length as a first compensation time length.
In an alternative embodiment, the first determination module comprises a third determination submodule for: when the mean temperature difference value is greater than a third temperature difference threshold value and less than or equal to a second temperature difference threshold value, determining the defrosting interval compensation time length as a second compensation time length; wherein the second compensation duration is greater than the first compensation duration.
In an alternative embodiment, the apparatus further comprises: the second acquisition module is used for acquiring a second temperature variation of the outer coil in the defrosting interval compensation duration; the second determining module is used for determining the defrosting interval supplement duration according to the second temperature variation; and the second main control module is used for controlling the air conditioner to start the defrosting process when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length, the defrosting interval compensation time length and the defrosting interval supplement time length.
The method for controlling the defrosting of the air conditioner determines the time interval between two continuously executed defrosting processes according to the detected variation of the temperature of the external coil, so that the change of the frosting condition of the air conditioner caused by the factors such as the operation of the air conditioner, the external environment and the like can be considered, the time interval between two adjacent defrosting processes can be matched with the actual defrosting requirement, the control is more accurate, and the operation energy efficiency of the air conditioner in severe cold and low temperature weather is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a first flowchart illustrating a defrost control method of the present invention according to an exemplary embodiment;
FIG. 2 is a block diagram I of the defrost control apparatus of the present invention shown in accordance with an exemplary embodiment;
fig. 3 is a block diagram ii showing the structure of the defrosting control means of the present invention according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention 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 embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. 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. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
FIG. 1 is a first flowchart illustrating a defrost control method of the present invention according to an exemplary embodiment.
As shown in fig. 1, the present invention provides a method for controlling defrosting of an air conditioner, which can be used for controlling and adjusting a time interval of a defrosting process performed by the air conditioner when the air conditioner is operated in a winter or in a severe cold climate, where frosting and icing of an outdoor unit are easily caused, and specifically, the flow steps of the control method include:
s101, acquiring a first temperature variation of the outer coil in a reference defrosting interval duration;
in an optional embodiment, when the outdoor unit of the air conditioner applied in the present invention has an icing problem, whether a condition that the defrosting process needs to be executed is determined by detecting an icing thickness, power consumption of the compressor, and the like, and if the condition is satisfied, the air conditioner is controlled to execute the defrosting process so as to perform defrosting and defrosting processing on the outdoor unit; the above-mentioned judgment condition of the air conditioner executing the defrosting process and the specific defrosting control manner when executing the defrosting process can adopt the technology disclosed in the prior art, and the invention is not limited thereto.
For example, one conventional air conditioner determining condition is to detect the temperature of the external coil and calculate the condensation temperature of the current outdoor environment, and when the temperature of the external coil is lower than the calculated condensation temperature, it may be determined that the outdoor environment may have a frosting and icing temperature, and at this time, the air conditioner may execute a defrosting process.
Specifically, one implementation manner of executing the defrosting process at the air conditioner is as follows: and the air conditioner is switched to a refrigeration mode for operation. When the air conditioner executes a refrigeration mode, the flow direction of the high-temperature refrigerant discharged by the compressor firstly flows through the outdoor heat exchanger, then flows into the indoor heat exchanger, and finally flows back to the compressor, and the flow mode is performed circularly. Therefore, the heat of the high-temperature refrigerant flowing through the outdoor heat exchanger is transferred to the outer surface of the outdoor heat exchanger, and the condensed ice layer can be melted into liquid water drops to drip or be directly sublimated, so that the aim of reducing the thickness of the ice layer on the outer surface of the outdoor unit by using the heat of the high-temperature refrigerant of the compressor and even completely removing frost is fulfilled.
Generally, the conventional outdoor unit defrosting process is mostly performed under the condition of sacrificing part of indoor heating effect, for example, when the air conditioner performs the defrosting process by using the above-mentioned refrigeration mode, the refrigerant of the indoor unit in the process is in a low-temperature state, which cannot raise the indoor temperature, or even causes the reduction of the indoor temperature, which obviously causes discomfort to the indoor user, so that the single defrosting process of the common indoor unit is mostly short in time, so as to reduce the adverse effect on the indoor temperature. In this case, the air conditioner needs to repeatedly execute the defrosting process for many times, and the defrosting control method of the invention is exemplified by one cycle of the defrosting process executed by the air conditioner for many times; specifically, the cycle duration of the control method of the invention is from the end of the previous defrosting process to the end of the current defrosting process.
In the embodiment of the present invention, in the two consecutive defrosting processes, when the previous defrosting process is finished, at least a certain time (i.e. the reference defrosting interval duration in the embodiment of the present invention) is required to be separated to perform the next defrosting process again, so as to ensure that the indoor temperature is increased again to the heating temperature comfortable for the user from the temperature reduced when the defrosting process is executed within the reference defrosting interval duration, that is, between the two consecutive defrosting processes, a buffer time for the air conditioner to increase the indoor temperature back to the target heating temperature set by the user needs to be reserved, so as to avoid the disadvantage that the indoor temperature is continuously decreased due to the too short interval duration of the two consecutive defrosting processes.
In this embodiment and the following embodiments of the present invention, a split type air conditioner is taken as an example, and the split type air conditioner mainly includes an indoor unit and an outdoor unit, wherein the indoor unit is disposed in indoor areas such as a living room and a bedroom, and the outdoor unit is disposed in outdoor areas such as an outer wall and a roof of a building. The outdoor unit is provided with a defrosting sensor, the defrosting sensor is located at an outer coil of the outdoor unit and can sense the temperature change of the outer coil, therefore, in the step S101, the temperature of the outer coil can be detected by the temperature sensor and is used as the temperature parameter of the outer coil of the current control process, and a first temperature change amount can be further calculated according to the temperature of the outer coil.
In the embodiment, the first temperature change amount is a value of temperature increase or decrease in a set unit time period.
In an optional embodiment, in step S101, a temperature variation of the external coil in the reference defrosting interval duration is obtained, and the step mainly includes: acquiring a plurality of temperature values in a set duration within a reference defrosting interval duration, calculating temperature difference values between adjacent sequence of temperature values in the set duration, and determining a temperature difference mean value of the temperature difference values; the mean temperature difference value is used as the first temperature variation in step S101.
The set duration can be used as the set unit duration, and the specific duration can be determined according to actual measurement needs, such as 2 minutes, 5 minutes, and the like.
For example, in an alternative embodiment, the set duration is 2 minutes, the temperature of the external coil is detected every 30 seconds within 2 minutes, the detected temperature parameters of the external coil include 3.1 ℃ (time 0 s), 3 ℃ (time 30 s), 2.7 ℃ (time 1 min), 2.6 ℃ (time 1 min 30 s) and 2.4 ℃ (time 2 min), and then the temperature difference values between adjacent temperature values are calculated, and the obtained temperature difference values are 0.1 ℃, 0.3 ℃, 0.1 ℃ and 0.2 ℃ in sequence; then, the average of the temperature differences of the four temperature differences was found to be (0.1+0.3+0.1+0.2)/4 — 0.175 ℃.
Or, the temperature of the external coil pipe may be detected at any two time points within the set duration, and the temperature difference between the temperatures of the external coil pipes corresponding to the two time points may be used as the first temperature variation.
For example, in another alternative embodiment, the set duration is 2 minutes, and the temperature of the outer coil is detected once at the 0 s-th time point and the 2 nd minute time point within the 2 minutes, and the difference between the two outer coil temperatures is calculated and used as the first temperature variation.
S102, determining the defrosting interval compensation duration according to the first temperature variation;
in an embodiment of the present invention, the determining the defrosting interval compensation duration according to the first temperature variation in step S102 includes: and determining the defrosting interval compensation time length according to the comparison result of the temperature difference mean value and the set temperature difference threshold value.
For example, when the mean temperature difference is greater than the first temperature difference threshold, the defrosting interval compensation time length is determined to be zero;
when the temperature difference average value is larger than the second temperature difference threshold value and smaller than or equal to the first temperature difference threshold value, determining the defrosting interval compensation time length as a first compensation time length;
when the mean temperature difference value is greater than a third temperature difference threshold value and less than or equal to a second temperature difference threshold value, determining the defrosting interval compensation time length as a second compensation time length; wherein the second compensation duration is greater than the first compensation duration.
Specifically, the air conditioner is prestored with at least one correlation relationship, wherein the correlation relationship correlates the first temperature variation with a preset defrosting interval compensation duration, and if the temperature variation range of the first temperature variation is [ X1, + ∞ ], the corresponding defrosting interval compensation duration is 0 minute; when the temperature variation range of the first temperature variation is [ X2, X1 ], the corresponding defrosting interval compensation time length is 20 minutes; when the temperature variation range of the first temperature variation amount is [ X3, X2 ], the corresponding defrosting interval compensation time period is 30 minutes, and so on.
In the correlation, X1, X2, X3, etc. can be used as relatives to set temperature difference threshold values, wherein X1 is a first temperature difference threshold value, X2 is a second temperature difference threshold value, X3 is a third temperature difference threshold value, and so on.
In the correlation, the larger the value of the temperature variation range of the first temperature variation (the temperature variation is generally mostly reduced in winter or severe cold climate), the shorter the corresponding defrosting interval compensation duration is, i.e. the faster the temperature of the external coil is reduced, the shorter the defrosting interval compensation duration determined according to the above-mentioned pipeline relationship is, and therefore, the shorter the total interval duration of the two consecutive defrosting processes is, in the embodiment, the total interval duration of the two consecutive defrosting processes is the above-mentioned reference defrosting interval duration. Therefore, the air conditioner can execute the defrosting process for a plurality of times in a short time under the condition that the temperature of the external coil pipe is greatly changed, so as to avoid excessive frost or excessive thickness of the condensed frost on the outdoor unit.
Conversely, the smaller the value of the temperature variation range of the first temperature variation, the longer the corresponding defrosting interval compensation time, i.e. the slower the temperature of the external coil is reduced, the longer the defrosting interval compensation time determined according to the above-mentioned pipeline relationship, and therefore, the longer the total interval time of two consecutive defrosting processes. Therefore, the air conditioner can execute the defrosting process for multiple times at a longer total time interval under the condition that the temperature change of the outer coil pipe is smaller, and the extra power consumption of the air conditioner caused by executing the defrosting process is reduced under the condition that the defrosting effect is not influenced.
S103, judging whether the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length and the defrosting interval compensation time length, if so, executing the step S104, and if not, repeatedly executing the judging step of the step S103;
in the embodiment of the present invention, when the control flow of the current cycle is executed, the air conditioner starts timing when the previous defrosting flow is ended.
Preferably, the set duration selected in the foregoing embodiment is generally selected as the last period of the reference defrosting interval duration, and if the reference defrosting interval duration is 45 minutes and the set duration is 2 minutes, the step of detecting the temperature parameters of the plurality of external coils is performed from 43 minutes to 45 minutes, so that when the defrosting interval compensation duration determined according to the first temperature variation is not zero, the defrosting interval compensation duration can be directly and continuously timed when the reference defrosting interval duration is over, and the timing is accumulated to the accumulated duration, thereby ensuring the accuracy of air conditioner time measurement, and improving the time accuracy of the air conditioner in executing the defrosting process.
And S104, controlling the air conditioner to start a defrosting process.
The method for controlling the air conditioner defrosting determines the time interval between two continuously executed defrosting processes according to the temperature variation detected by the defrosting sensor, so that the change of the frosting condition of the air conditioner caused by the factors such as the operation of the air conditioner, the external environment and the like can be considered, the time interval between two adjacent defrosting processes can be matched with the actual defrosting requirement, the control is more accurate, and the operation energy efficiency of the air conditioner in severe cold and low temperature weather is ensured.
In addition, in the foregoing control flow, the corresponding defrosting interval compensation time length is mainly increased after the temperature change condition within the reference defrosting interval time length is considered; and when the air conditioner operates in the time period of the defrosting interval compensation duration, the temperature of the external coil still changes to a certain extent, so that in order to further improve the control precision of the method for controlling the time interval between the defrosting processes, the method can also comprise the following steps:
acquiring a second temperature variation of the outer coil in the defrosting interval compensation duration;
in this embodiment, the obtaining manner of the second temperature variation may refer to the obtaining manner of the first temperature variation in the foregoing embodiment, which is not described herein again;
determining the defrosting interval supplement duration according to the second temperature variation;
in this embodiment, the air conditioner may further have a pre-stored correlation in which the second temperature variation is correlated with the preset defrosting interval compensation time period, and the air conditioner may further determine the defrosting interval supplement time period by the first temperature variation and the correlation. The setting of the association relationship in this embodiment may refer to the association relationship between the first temperature variation and the defrosting interval compensation duration in the foregoing embodiment, which is not described herein again.
And when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length, the defrosting interval compensation time length and the defrosting interval supplement time length, controlling the air conditioner to start the defrosting process.
Fig. 2 is a first block diagram showing the structure of the defrosting control apparatus of the present invention according to an exemplary embodiment.
As shown in fig. 2, the present invention further provides a device for controlling defrosting of an air conditioner, which can be applied to the flow of the defrosting control method in the foregoing embodiment to control and regulate the defrosting flow performed by the air conditioner, specifically, the control device 200 includes:
a first obtaining module 210, configured to obtain a first temperature variation of the external coil in a reference defrosting interval duration;
in the embodiment of the present invention, the control device is applied to an air conditioner, the outdoor unit of the air conditioner is provided with a defrost sensor for detecting the temperature of the external coil, and the defrost sensor performs data communication with the first obtaining module 210. Thus, the defrost sensor may determine a first temperature variation within the reference defrost interval duration according to the detected temperature of the external coil, and send the first temperature variation to the first obtaining module 210; alternatively, the defrost sensor sends the detected temperature parameter of the external coil to the first obtaining module 210, and then the first obtaining module 210 calculates and determines the first temperature variation.
A first determining module 220, configured to determine a defrosting interval compensation duration according to the first temperature variation;
the first main control module 230 is configured to control the air conditioner to start the defrosting process when an accumulated time length after a previous defrosting process of the air conditioner is finished reaches a sum of the reference defrosting interval time length and the defrosting interval compensation time length.
The method for controlling the air conditioner defrosting determines the time interval between two continuously executed defrosting processes according to the temperature variation detected by the defrosting sensor, so that the change of the frosting condition of the air conditioner caused by the factors such as the operation of the air conditioner, the external environment and the like can be considered, the time interval between two adjacent defrosting processes can be matched with the actual defrosting requirement, the control is more accurate, and the operation energy efficiency of the air conditioner in severe cold and low temperature weather is ensured.
Fig. 3 is a first block diagram of the defrost control apparatus of the present invention according to an exemplary embodiment.
The present invention further provides a device for controlling defrosting of an air conditioner, where the device can be used to control and adjust the rotation speed of an outdoor fan of the air conditioner by applying the control method in the above embodiments, and specifically, the control device 300 includes a first obtaining module 310, a first determining module 320, and a first main control module 330.
In this embodiment, the first obtaining module 310 is specifically configured to: the method comprises the steps of obtaining a plurality of temperature values in a set duration within a reference defrosting interval duration, calculating temperature difference values between adjacent sequence of temperature values in the set duration, and determining a temperature difference mean value of the temperature difference values.
The first determining module 320 is specifically configured to: and determining the defrosting interval compensation time according to the comparison result of the temperature difference mean value determined by the first acquisition module and the set temperature difference threshold.
In this embodiment, the first determining module 320 includes a first determining submodule 321, and the first determining submodule 321 is configured to: and when the average temperature difference value is larger than the first temperature difference threshold value, determining that the defrosting interval compensation time length is zero.
In this embodiment, the first determining module 320 includes a second determining submodule 322, and the second determining submodule 322 is configured to: and when the mean temperature difference value is greater than the second temperature difference threshold value and less than or equal to the first temperature difference threshold value, determining the defrosting interval compensation time length as a first compensation time length.
In this embodiment, the first determining module 320 includes a third determining submodule 323, and the third determining submodule 323 is configured to: when the mean temperature difference value is greater than a third temperature difference threshold value and less than or equal to a second temperature difference threshold value, determining the defrosting interval compensation time length as a second compensation time length; wherein the second compensation duration is greater than the first compensation duration.
In this embodiment, the control device further includes:
a second obtaining module 340, configured to obtain a second temperature variation of the external coil during the defrosting interval compensation duration;
a second determining module 350, configured to determine the defrosting interval supplement duration according to the second temperature variation;
and the second main control module 360 is configured to control the air conditioner to start the defrosting process when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length, the defrosting interval compensation time length and the defrosting interval supplement time length.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A method for controlling defrosting of an air conditioner, comprising:
acquiring a first temperature variation of the outer coil in a reference defrosting interval duration;
determining the defrosting interval compensation time length according to the first temperature variation;
when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length and the defrosting interval compensation time length, controlling the air conditioner to start the defrosting process;
the reference defrosting interval duration is the buffering time which is reserved between two continuous defrosting processes and is used for the air conditioner to raise the indoor temperature to the target heating temperature set by the user again.
2. The method of claim 1,
obtaining a first temperature variation of the outer coil over a baseline defrost interval duration, comprising: acquiring a plurality of temperature values in a set duration within the reference defrosting interval duration, calculating temperature difference values between the temperature values in adjacent sequences in the set duration, and determining a temperature difference average value of the temperature difference values;
determining a defrost interval compensation duration based on the first temperature variation, comprising: and determining the defrosting interval compensation time length according to the comparison result of the temperature difference mean value and the set temperature difference threshold value.
3. The method of claim 2, wherein determining a defrost interval compensation duration based on the comparison of the temperature difference average to a set temperature difference threshold comprises:
and when the temperature difference average value is larger than a first temperature difference threshold value, determining that the defrosting interval compensation time length is zero.
4. The method of claim 3, wherein determining a defrost interval compensation duration based on the comparison of the temperature difference average to a set temperature difference threshold further comprises:
and when the temperature difference average value is greater than a second temperature difference threshold value and less than or equal to the first temperature difference threshold value, determining that the defrosting interval compensation time length is a first compensation time length.
5. The method of claim 4, wherein determining a defrost interval compensation duration based on the comparison of the temperature difference average to a set temperature difference threshold further comprises:
when the temperature difference average value is larger than a third temperature difference threshold value and smaller than or equal to a second temperature difference threshold value, determining the defrosting interval compensation time length as a second compensation time length;
wherein the second compensation duration is greater than the first compensation duration.
6. The method of claim 1, further comprising:
acquiring a second temperature variation of the outer coil in the defrosting interval compensation duration;
determining the defrosting interval supplement duration according to the second temperature variation;
and when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length, the defrosting interval compensation time length and the defrosting interval supplement time length, controlling the air conditioner to start the defrosting process.
7. An apparatus for controlling defrosting of an air conditioner, comprising:
the first acquisition module is used for acquiring a first temperature variation detected by the outer coil pipe within a reference defrosting interval duration;
the first determining module is used for determining the defrosting interval compensation duration according to the first temperature variation;
the first main control module is used for controlling the air conditioner to start a defrosting process when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length and the defrosting interval compensation time length;
the reference defrosting interval duration is the buffering time which is reserved between two continuous defrosting processes and is used for the air conditioner to raise the indoor temperature to the target heating temperature set by the user again.
8. The apparatus of claim 7,
the first obtaining module is specifically configured to: acquiring a plurality of temperature values in a set duration within the reference defrosting interval duration, calculating temperature difference values between the temperature values in adjacent sequences in the set duration, and determining a temperature difference average value of the temperature difference values;
the first determining module is specifically configured to: and determining the defrosting interval compensation time according to the comparison result of the temperature difference mean value determined by the first acquisition module and a set temperature difference threshold value.
9. The apparatus of claim 8, wherein the first determining module comprises a first determining submodule configured to:
and when the temperature difference average value is larger than a first temperature difference threshold value, determining that the defrosting interval compensation time length is zero.
10. The apparatus of claim 9, wherein the first determining module comprises a second determining submodule configured to:
and when the temperature difference average value is greater than a second temperature difference threshold value and less than or equal to the first temperature difference threshold value, determining that the defrosting interval compensation time length is a first compensation time length.
11. The apparatus of claim 10, wherein the first determination module comprises a third determination submodule configured to:
when the temperature difference average value is larger than a third temperature difference threshold value and smaller than or equal to a second temperature difference threshold value, determining the defrosting interval compensation time length as a second compensation time length;
wherein the second compensation duration is greater than the first compensation duration.
12. The apparatus of claim 7, further comprising:
the second acquisition module is used for acquiring a second temperature variation of the outer coil in the defrosting interval compensation duration;
the second determining module is used for determining the defrosting interval supplement duration according to the second temperature variation;
and the second main control module is used for controlling the air conditioner to start the defrosting process when the accumulated time length after the previous defrosting process of the air conditioner is finished reaches the sum of the reference defrosting interval time length, the defrosting interval compensation time length and the defrosting interval supplement time length.
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| CN111895600B (en) * | 2019-05-06 | 2022-06-14 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895601A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895594A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895598B (en) * | 2019-05-06 | 2022-04-19 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895591B (en) * | 2019-05-06 | 2021-12-21 | 重庆海尔空调器有限公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN110469969B (en) * | 2019-07-25 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN112815587A (en) * | 2019-11-15 | 2021-05-18 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting exit control method and device, electronic equipment and storage medium |
| CN114811715A (en) * | 2022-04-27 | 2022-07-29 | 浙江中广电器集团股份有限公司 | Energy-saving control method for heat pump EVI waterless floor heating multi-split air conditioner |
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| JPS62218748A (en) * | 1986-03-19 | 1987-09-26 | Matsushita Electric Ind Co Ltd | Defrosting controller for air-conditioning machine |
| CN104165486B (en) * | 2013-05-17 | 2016-09-14 | 广东美的集团芜湖制冷设备有限公司 | The Defrost method of air-conditioner |
| CN106152643B (en) * | 2015-04-17 | 2018-09-11 | 陈则韶 | Air source hot pump water heater Defrost method |
| CN107300240A (en) * | 2017-05-17 | 2017-10-27 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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