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.
The embodiment of the present disclosure provides a control method for defrosting an air conditioner, as shown in fig. 1, including the following steps:
s101: and under the condition that the air conditioner needs defrosting, controlling the heating of the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger of the air conditioner.
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.
Optionally, whether the air conditioner needs defrosting is judged by comparing the outdoor environment temperature with the frost point temperature. When the outdoor environment temperature is lower than the frost point temperature, the air conditioner is considered to need defrosting; when the outdoor ambient temperature is higher than the frost point temperature, the air conditioner is considered to be not required to defrost.
The defrosting operation of the air conditioner comprises the step of controlling the heating of the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger of the air conditioner so as to improve the temperature of the refrigerant flowing into the outdoor heat exchanger, and at the moment, because the temperature of the refrigerant flowing into the outdoor heat exchanger is higher, the heat is transferred to one side of the outdoor environment, and the frost of the outdoor heat exchanger can be melted by the heat of the refrigerant with the improved temperature.
Optionally, a heating device is disposed at a refrigerant liquid inlet pipeline of the air conditioner outdoor heat exchanger, and the heating device is configured to controllably heat the refrigerant flowing through the refrigerant liquid inlet pipeline. Under the condition that the air conditioner needs defrosting, the heating device can be controlled to be started; and under the condition that the air conditioner does not need heating, the off state of the heating device is kept.
In one embodiment, the heating device is an electromagnetic heating device, which heats the refrigerant pipeline by using the principle of electromagnetic induction heating, and then conducts heat to the refrigerant flowing through the refrigerant pipeline by using the refrigerant pipeline, so as to heat the refrigerant.
The electromagnetic heating device mainly comprises an induction coil and a power supply module, wherein the induction coil is wound on the refrigerant pipeline section, and the power supply module can provide alternating current for the induction coil; when the induction coil is electrified, alternating current flowing through the induction coil generates an alternating magnetic field passing through the refrigerant pipe section, and the alternating magnetic field can generate eddy currents in the refrigerant pipe section, so that the heating and warming effects can be realized by means of the energy of the eddy currents.
It should be understood that the type of the heating device for heating the refrigerant is not limited to the above electromagnetic heating device, and other types of heating devices capable of directly or indirectly heating the refrigerant in the related art may also apply the technical solution of the present application and are covered by the protection scope of the present application.
S102: and obtaining the temperature, the heating times and the heating duration of the outdoor coil of the outdoor heat exchanger.
Optionally, a first temperature sensor is disposed at a coil position of an outdoor heat exchanger of the outdoor unit of the air conditioner, and the first temperature sensor may be configured to detect a real-time temperature of the coil position. Thus, the outdoor coil temperature acquired in step S102 may be the real-time temperature of the coil position detected by the first temperature sensor.
The temperature change of the coil pipe position of the outdoor heat exchanger can visually reflect the temperature change condition of the refrigerant pipeline of the outdoor heat exchanger under the joint influence of the external outdoor environment temperature and the internal refrigerant temperature, and in addition, the temperature change condition is generally a pipeline part of the outdoor heat exchanger, which is easy to cause the frosting problem. Therefore, the acquired temperature of the outdoor coil can be used as a reference factor for measuring the frosting influence of the inside and the outside of the air conditioner on the outdoor heat exchanger.
The heating times are the heating times for heating the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger of the air conditioner within the preset time; the heating time is the heating time for heating the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger of the air conditioner at the last time.
The method comprises the steps of controlling the heating of the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger of the air conditioner, and increasing the temperature of the refrigerant flowing into the outdoor heat exchanger so as to melt the frost of the outdoor heat exchanger by utilizing the heat of the refrigerant after the temperature is increased. In the case of incomplete defrosting, frequent heating defrosting and prolonged defrosting time by single heating may be caused. Therefore, the heating times and the heating time can be used as reference factors for whether the heating defrosting operation is thorough in defrosting.
S103: and under the condition that the temperature, the heating times and the defrosting time of the outdoor coil meet first preset conditions, controlling the air conditioner to enter a reverse circulation defrosting mode.
The reverse circulation defrosting mode comprises the step of controlling the flow direction of a refrigerant of the air conditioner to be switched to the flow direction opposite to the heating mode; in the mode flow, the high-temperature refrigerant discharged by the compressor firstly flows through the outdoor heat exchanger, so that the defrosting operation of the outdoor heat exchanger can be realized by utilizing the heat of the high-temperature refrigerant.
The time when the air conditioner enters the reverse circulation defrosting mode is comprehensively judged by using the parameters of the temperature of the outdoor coil of the outdoor heat exchanger, the heating times of the heating device and the heating duration, the air conditioner is controlled to enter the reverse circulation defrosting mode under the condition that the outdoor heat exchanger is frosted and the heating defrosting operation cannot be completely defrosted, the control precision for controlling the air conditioner to enter the reverse circulation defrosting mode is improved, and the condition that the air conditioner runs the reverse circulation defrosting mode when the outdoor heat exchanger needs defrosting is avoided, so that the normal heating performance of the air conditioner is greatly influenced.
Optionally, the first preset condition is:
T1≤T01,t1≥t01,N1≥N01and t is2≥t02
Wherein, T1Is the outdoor coil temperature, T, of the outdoor heat exchanger01Is a first predetermined temperature, t1Is T1≤T01Duration of (d), t01For a first predetermined duration, N1Number of times of heating for heating refrigerant flowing through refrigerant inlet line of outdoor heat exchanger, N01For a predetermined number of heating times, t2Is the Nth1The heating time t for heating the refrigerant flowing through the refrigerant inlet pipeline of the outdoor heat exchanger02Is a second preset duration.
Optionally, the first predetermined temperature is in the range of [3 ℃, 6 ℃ (DEG C: centigrade), e.g., 3 ℃, 4 ℃, 5 ℃, 6 ℃; the value range of the first preset time length is [50s, 70s ] (s: s), for example, 50s, 60s, 70 s; the value range of the second preset time is [2min, 4min ] (min: min), for example, 2min, 3min, 4 min; the preset heating times range from [2, 4 ], for example, 2, 3, 4.
For example, when the temperature of the outdoor coil is not more than 5 degrees for 60 seconds continuously, the heating times are more than 3 times, and the 3 rd humidifying time is more than 3 minutes, the air conditioner is controlled to enter the reverse cycle defrosting mode.
Optionally, the controlling of the heating of the refrigerant flowing through the refrigerant inlet line of the outdoor heat exchanger includes:
determining heating parameters for heating according to the temperature difference value between the initial outdoor coil temperature of the outdoor heat exchanger and the temperature of the outdoor coil;
controlling the heating of the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger according to the heating parameters;
wherein the heating parameter comprises a target heating rate, a target heating time length or a target heating discontinuous time length.
When the air conditioner needs defrosting, the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger is controlled to be heated, and the initial outdoor coil temperature of the outdoor heat exchanger is the outdoor coil temperature under the frosting condition of the outdoor heat exchanger. As the heating defrost operation progresses, the outdoor coil temperature of the outdoor heat exchanger gradually increases. Therefore, the temperature difference between the initial outdoor coil temperature of the outdoor heat exchanger and the outdoor coil temperature may reflect the defrosting condition of the air conditioner. If the temperature difference is small, the frosting degree of the outdoor heat exchanger of the air conditioner is serious, and at the moment, the heating rate needs to be improved, the heating time length needs to be increased, the heating interruption time length needs to be shortened, and the defrosting needs to be accelerated; if the temperature difference is large, the frosting degree of the outdoor heat exchanger of the air conditioner is low, the heating rate can be properly reduced, the heating time is shortened, the heating interruption time is prolonged, and the energy-saving effect is achieved. Thus, the heating parameters for heating can be determined from the temperature difference. Heating is carried out according to corresponding heating parameters, and the running power consumption of a heating device for heating a refrigerant is reduced as much as possible under the condition of ensuring the normal defrosting of the air conditioner, so that the energy-saving effect is achieved.
Optionally, determining the target heating rate according to the temperature difference comprises:
and according to the temperature difference, acquiring a corresponding heating rate from the heating rate association relation and taking the heating rate as a target heating rate.
The heating rate correlation includes a correspondence between one or more temperature differences and a heating rate. For example, table 1 shows an alternative temperature difference versus heating rate (where Δ T ═ T)1-TInitialDelta T is the temperature difference between the initial outdoor coil temperature and the outdoor coil temperature of the outdoor heat exchanger, TInitialInitial outdoor coil temperature for outdoor heat exchanger):
table 1: correlation of heating rates
In the heating rate correlation, the heating rate is inversely related to the temperature difference. That is, the greater the temperature difference, the smaller the heating rate; the smaller the temperature difference, the greater the heating rate.
Optionally, determining the target heating time period according to the temperature difference comprises:
and according to the temperature difference, acquiring the corresponding heating time length from the correlation of the heating time lengths and taking the heating time length as the target heating time length.
The heating duration correlation includes a correspondence between one or more temperature differences and the heating duration. For example, table 2 shows an alternative temperature difference versus heating time period:
table 2: correlation of heating duration
Temperature difference (Unit:. degree. C.)
|
Heating time (unit: min)
|
a1<ΔT≤a2 |
t11 |
a2<ΔT≤a3 |
t12 |
a3<ΔT
|
t13 |
In the correlation relationship of the heating time length, the heating time length and the temperature difference value are in negative correlation. That is, the larger the temperature difference, the smaller the heating time period; the smaller the temperature difference, the longer the heating period.
Optionally, determining the target heating intermittent duration according to the temperature difference comprises:
and according to the temperature difference, acquiring the corresponding heating discontinuous time length from the correlation of the heating discontinuous time lengths and taking the heating discontinuous time length as the target heating discontinuous time length.
The heating interruption time length correlation comprises a corresponding relation between one or more temperature difference values and the heating interruption time length. For example, table 3 shows an alternative temperature difference versus heating interval duration:
table 3: correlation of heating interruption time
Temperature difference (Unit:. degree. C.)
|
Heating interruption time (unit: min)
|
a1<ΔT≤a2 |
t21 |
a2<ΔT≤a3 |
t22 |
a3<ΔT
|
t23 |
In the correlation relationship of the heating interruption time length, the heating interruption time length is in positive correlation with the temperature difference. That is, the larger the temperature difference is, the longer the heating interruption time is; the smaller the temperature difference, the shorter the heating interruption period.
In some embodiments, after controlling the heating of the refrigerant flowing through the refrigerant inlet line of the outdoor heat exchanger, the method further includes:
obtaining the refrigerant inlet liquid temperature of the outdoor heat exchanger;
and under the condition that the liquid inlet temperature of the refrigerant meets a second preset condition, controlling to stop heating the refrigerant flowing through the liquid inlet pipeline of the refrigerant of the outdoor heat exchanger.
Optionally, a second temperature sensor is disposed in the outdoor heat exchanger of the outdoor unit, and the second temperature sensor may be configured to detect a real-time temperature of the refrigerant flowing through the refrigerant inlet line of the outdoor heat exchanger. Therefore, the acquired refrigerant inlet liquid temperature of the outdoor heat exchanger may be a real-time temperature of the refrigerant detected by the second temperature sensor. Here, the refrigerant liquid inlet line is a line through which the refrigerant flows into the outdoor heat exchanger when the air conditioner operates in the heating mode.
The flow sequence of the refrigerant discharged by the compressor in the heating mode in the refrigerant circulation loop is as follows: the air flows through the indoor heat exchanger, then flows through the throttling device for throttling, then flows into the outdoor heat exchanger, and finally flows back to the compressor. Before the refrigerant flows into the outdoor heat exchanger, the temperature of the refrigerant is gradually reduced under the combined influence of the heat exchange process of the indoor heat exchanger and the throttling action of the throttling device; under different outdoor working conditions, the temperature of the refrigerant flowing into the outdoor heat exchanger obviously also differs. For example, when the air conditioner has a frosting problem, the temperature of the refrigerant discharged by the compressor is lower than that of the refrigerant without frosting, meanwhile, the indoor environment is influenced by the outdoor severe environment, and the heat released by the refrigerant after flowing through the indoor heat exchanger is more, so that the temperature of the refrigerant finally flowing into the outdoor heat exchanger is a lower value, and the refrigerant inlet temperature can reflect the frosting condition of the air conditioner from the side.
Optionally, the second preset condition is:
T2≥T02and t is3≥t03
Wherein, T2Is the refrigerant inlet liquid temperature, T, of the outdoor heat exchanger02Is a second predetermined temperature, t3Is T2≥T02Duration of (d), t03A third preset duration.
In the second preset condition, the refrigerant inlet temperature of the outdoor heat exchanger is greater than the second preset temperature, and the duration is greater than the third preset duration, so that the condition that the heating performance of the outdoor heat exchanger recovers at least frost or no frost can be reflected. Therefore, the heating of the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger of the air conditioner can be stopped, the power consumption of the heating device for heating the refrigerant is reduced, and the running cost of the air conditioner is reduced.
Fig. 2 is a schematic flow chart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure.
The embodiment of the present disclosure provides a control method for defrosting an air conditioner, as shown in fig. 2, including the following steps:
s201: and judging whether the air conditioner needs to be defrosted or not.
S202: under the condition that the air conditioner needs defrosting, obtaining the temperature difference value between the initial outdoor coil temperature of the outdoor heat exchanger and the temperature of the outdoor coil;
s203: and determining heating parameters of heating according to the temperature difference.
S204: and controlling the heating of the refrigerant flowing through the refrigerant liquid inlet pipeline of the outdoor heat exchanger according to the heating parameters.
S205: and obtaining the liquid inlet temperature of the refrigerant of the outdoor heat exchanger.
S206: and judging whether the liquid inlet temperature of the refrigerant meets a second preset condition.
S207: and under the condition that the liquid inlet temperature of the refrigerant meets a second preset condition, controlling to stop heating the refrigerant flowing through the liquid inlet pipeline of the refrigerant of the outdoor heat exchanger.
S208: and obtaining the temperature, the heating times and the heating duration of the outdoor coil of the outdoor heat exchanger.
S209: and judging whether the temperature, the heating times and the defrosting time of the outdoor coil meet first preset conditions or not.
S210: and under the condition that the temperature, the heating times and the defrosting time of the outdoor coil meet first preset conditions, controlling the air conditioner to enter a reverse circulation defrosting mode.
In the embodiment, the time when the air conditioner enters the reverse-circulation defrosting mode is comprehensively judged by using the parameters of the temperature of the outdoor coil of the outdoor heat exchanger, the heating times of the heating device and the heating duration, the air conditioner is controlled to enter the reverse-circulation defrosting mode under the condition that the air conditioner is frosted and other defrosting modes with small influence on normal heating of the air conditioner are not defrosted completely, the control precision for controlling the air conditioner to enter the reverse-circulation defrosting mode is improved, and the large influence on the normal heating performance of the air conditioner caused by the fact that the air conditioner runs the reverse-circulation defrosting mode when the outdoor heat exchanger needs defrosting is avoided.
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)30 and a memory (memory)31, and may further include a Communication Interface (Communication Interface)32 and a bus 33. The processor 30, the communication interface 32 and the memory 31 may communicate with each other through a bus 33. Communication interface 32 may be used for information transfer. The processor 30 may call logic instructions in the memory 31 to perform the control method for air conditioner defrosting of the above-described embodiment.
In addition, the logic instructions in the memory 31 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 31 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 30 executes functional applications and data processing by executing program instructions/modules stored in the memory 31, that is, implements the control method for defrosting an air conditioner in the above-described method embodiment.
The memory 31 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 31 may include a high-speed random access memory, and may also include a nonvolatile memory.
Fig. 4 is a schematic structural diagram of an air conditioner provided in an embodiment of the present disclosure.
An embodiment of the present disclosure provides an air conditioner, as shown in fig. 4, including:
a refrigerant circulation circuit formed by connecting an outdoor heat exchanger 41, an indoor heat exchanger 42, a throttling device 43 and a compressor 44 through refrigerant pipelines;
a heating device 45 disposed on the refrigerant inlet pipeline of the outdoor heat exchanger 41 in the heating mode, and configured to heat the refrigerant flowing through the refrigerant inlet pipeline;
the control device 46 for defrosting the air conditioner is electrically connected to the heating device 45.
In the embodiment, the time when the air conditioner enters the reverse circulation defrosting mode is comprehensively judged by using the parameters of the temperature of the outdoor coil of the outdoor heat exchanger, the heating times of the heating device and the heating duration, so that the control precision for controlling the air conditioner to enter the reverse circulation defrosting mode is improved, and the great influence on the normal heating performance of the air conditioner caused by the fact that the air conditioner runs the reverse circulation defrosting mode when the outdoor heat exchanger needs defrosting is avoided; the temperature of the refrigerant flowing into the outdoor heat exchanger is increased by heating the refrigerant flowing through the refrigerant liquid inlet pipeline, condensed frost is melted by using the heat of the refrigerant, the defrosting operation of the air conditioner is realized under the condition that the normal heating operation state of the air conditioner is not broken, and the use experience of users is improved.
The embodiment of the disclosure provides a computer-readable storage medium storing computer-executable instructions configured to execute the control method for defrosting an air conditioner.
An embodiment of the present disclosure provides a computer program product including a computer program stored on a computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to execute the above control 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.