CN110736207B - Control method and control device for defrosting of air conditioner and air conditioner - Google Patents
Control method and control device for defrosting of air conditioner and air conditioner Download PDFInfo
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- CN110736207B CN110736207B CN201910917962.6A CN201910917962A CN110736207B CN 110736207 B CN110736207 B CN 110736207B CN 201910917962 A CN201910917962 A CN 201910917962A CN 110736207 B CN110736207 B CN 110736207B
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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
- 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
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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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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- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
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: acquiring air supplement flow when the air conditioner enters a reverse circulation defrosting mode and supplements air to the compressor; and controlling the heating operation of the liquid inlet refrigerant of the gas-liquid separator based on the air supply flow. The control method provided by the embodiment of the disclosure can control the heating operation of the liquid inlet refrigerant of the gas-liquid separator according to the air supply flow control for supplying air to the compressor when the air conditioner runs in the bypass defrosting mode, not only can directly adjust the temperature and the flow of the refrigerant which becomes gaseous after being heated and is then divided out for supplying air, but also can improve the temperature of the refrigerant flowing into the outdoor heat exchanger to improve the defrosting effect, thereby effectively reducing the problem that the defrosting capacity of the air conditioner is reduced along with the time caused by running in the bypass defrosting mode. The application also discloses a controlling means and air conditioner for the air conditioner defrosting.
Description
Technical Field
The present application relates to the field of air conditioner defrosting technologies, and for example, to a control method and a control device for air conditioner defrosting, and an air conditioner.
Background
With the development of science and technology, an air conditioner, which is a necessary electrical appliance for ordinary people's daily life, has been gradually developed from an initial single-cooling type to an advanced type capable of having more functions such as cooling, heating and defrosting, and here, an important problem inevitably faced by air-conditioning products operating in low-temperature areas or in climates with heavy wind and snow is the problem of frosting of the outdoor unit of the air conditioner, the outdoor heat exchanger of the outdoor unit functions as an evaporator for absorbing heat from the outdoor environment, and is affected by the temperature and humidity of the outdoor environment in winter, and much frost is easily condensed on the outdoor heat exchanger, when the frost is formed to a certain thickness, the heating capacity of the air conditioner will be lower and lower, so the defrosting function is also an important research topic in the air conditioning field gradually in order to ensure the heating effect and avoid excessive frost condensation.
In the prior art, the defrosting mode of the outdoor heat exchanger mainly comprises the following modes: firstly, in a reverse cycle defrosting mode, when the air conditioner performs 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; and secondly, a bypass defrosting mode is adopted, when the air conditioner is in normal heating operation, the high-temperature refrigerant discharged by the compressor can be conveyed to the outdoor heat exchanger through the independently arranged bypass branch, and the purpose of melting frost by using the heat of the refrigerant can also be realized.
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:
for the above reverse circulation defrosting mode, because the indoor heat exchanger is generally in a heat absorption state, in order to avoid discomfort to users caused by indoor cooling under a heating working condition, the heat absorption efficiency of the indoor heat exchanger is mostly inhibited by adopting modes of closing a fan, closing a small air deflector and the like; under the condition, because a large amount of refrigerants directly flow to the outdoor for heat exchange to defrost, the refrigerants after heat release are changed from gaseous state to liquid state, and meanwhile, the refrigerant evaporation function of the indoor heat exchanger is inhibited, so that more and more liquid refrigerants and less gaseous refrigerants are contained in the refrigerant circulation loop of the air conditioner, the temperature and flow of returned air and sucked air of the compressor are further reduced, and finally the defrosting capacity of the whole air conditioner is reduced along with the time.
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 a control device for defrosting of an air conditioner and the air conditioner, so as to solve the technical problem that the defrosting capacity of a reverse cycle defrosting mode in the related art is reduced along with time.
In some embodiments, a control method for defrosting an air conditioner includes:
acquiring air supplement flow when the air conditioner enters a reverse circulation defrosting mode and supplements air to the compressor; the air supplement comprises controlling at least part of the refrigerant circulation loop to flow back to the compressor along an air supplement branch through the gas-liquid separator;
and controlling the heating operation of the liquid inlet refrigerant of the gas-liquid separator based on the air supply flow.
In some embodiments, a control 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 in some of the foregoing embodiments.
In some embodiments, an 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;
one end of the air supplementing branch is communicated with an air supplementing port of the compressor, and the other end of the air supplementing branch is communicated with an air-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger; the air supply branch is provided with a control valve;
the heating device is arranged on the refrigerant liquid inlet pipeline of the gas-liquid separator in the reverse circulation defrosting mode and is configured to heat the refrigerant flowing through the refrigerant liquid inlet pipeline;
the control device for defrosting the air conditioner as in some embodiments of the foregoing is electrically connected with the control valve and the heating device.
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 of the air conditioner, provided by the embodiment of the disclosure, can control the heating operation of the liquid inlet refrigerant of the gas-liquid separator according to the air supply flow rate for supplying air to the compressor when the air conditioner runs in the bypass defrosting mode, can directly adjust the temperature and the flow rate of the refrigerant which becomes gaseous after being heated and is then divided out for supplying air, and can also improve the temperature of the refrigerant flowing into the outdoor heat exchanger so as to improve the defrosting effect, thereby effectively reducing the problem that the defrosting capacity of the air conditioner is reduced along with the time due to the running of the bypass defrosting mode.
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 structural diagram of a control device for defrosting an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an air conditioner provided in 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, the embodiment of the present disclosure provides a control method for defrosting an air conditioner, which can be used to solve the problem that the defrosting capability of the air conditioner gradually decreases when the air conditioner operates in a defrosting mode under rainy or snowy or low-temperature and severe cold conditions; in an embodiment, the main flow steps of the control method include:
s101, acquiring air supplement flow when the air conditioner enters a reverse circulation defrosting mode and supplements air to a compressor;
in the embodiment of the disclosure, the reverse-circulation defrosting mode is to control the refrigerant in the refrigerant circulation loop of the air conditioner to flow in the same flow direction as the heating mode, at this time, the high-temperature refrigerant discharged by the compressor firstly flows through the outdoor heat exchanger, and the heat carried by the refrigerant can be conducted to the outdoor heat exchanger, so that the frost condensed on the outer surface of the outdoor heat exchanger can absorb heat to melt, thereby achieving the purpose of defrosting the outdoor heat exchanger.
In the embodiment of the present disclosure, the air is supplemented to the compressor in step S101, and the temperature and the flow rate of the gaseous refrigerant in the refrigerant flowing back to the compressor can be increased by the way of supplementing air, so that the air supplementing operation applied to the defrosting process and the heating operation in the above embodiment can jointly ensure the defrosting capacity of the reverse cycle defrosting mode, so that a better defrosting effect can be achieved when the air conditioner operates the reverse cycle defrosting mode.
Optionally, the air conditioner is provided with an air supplement branch, one end of the air supplement branch is communicated with an air supplement port of the compressor, and the other end of the air supplement branch is communicated with a gas-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger; the air supply branch is provided with a control valve; therefore, the air supply operation performed on the compressor in step S101 can be performed by the air supply branch and the related accessories, and the air supply includes controlling at least a portion of the refrigerant in the refrigerant circulation loop to flow back to the compressor through the air-liquid separator along the air supply branch.
Here, the supplement air flow rate acquired in step S101 is a target supplement air flow rate capable of satisfying the compression performance requirement of the compressor or the defrosting capability of the air conditioner.
In some alternative embodiments, the make-up air flow is derived from the return air temperature of the compressor.
Here, the return air temperature of the compressor is a temperature of a refrigerant after a branch refrigerant flowing back to the compressor via the air supply branch and a main refrigerant flowing back to the compressor via the refrigerant circulation circuit are mixed, and is also an initial temperature of a refrigerant actually sucked and compressed by the compressor, and under the condition that the power of the compressor is not changed, the temperature and other parameters of an exhaust refrigerant of the compressor can be influenced by the level of the initial temperature, so that the defrosting capacity in the subsequent reverse cycle defrosting mode operation process can be influenced. Therefore, the flow rate of the supplied air is obtained according to the return air temperature of the compressor.
Optionally, obtaining the air supply flow according to the return air temperature of the compressor includes: and searching the corresponding air supply flow from the correlation according to the return air temperature of the compressor.
Here, the correlation includes a correspondence between one or more return air temperatures and the flow rate of the supplied air. Illustratively, an alternative return air temperature T is shown in Table 1Return airThe correspondence with the flow rate of the supplied air, as shown in the following table,
TABLE 1
In the corresponding relationship, the flow rate of the supplied air and the return air temperature TReturn airIs a negative correlation. I.e. return air temperature TReturn airThe smaller the value of (b) is, the lower the performance of the compressor and the defrosting capacity of the air conditioner are, so that the higher the make-up air flow rate is set to increase the temperature and flow rate of the return air refrigerant of the compressor.
Therefore, when the operation of acquiring the make-up air flow rate in step S101 is performed, the make-up air flow rate can be determined from the return air temperature.
Optionally, a temperature sensor is disposed at an air return port of the compressor, and the temperature sensor may be configured to detect a real-time temperature of a refrigerant flowing through the air return port; therefore, the present embodiment can use the temperature data detected by the temperature sensor as the return air temperature for determining the amount of make-up air flow.
And S102, controlling the heating operation of the liquid inlet refrigerant of the gas-liquid separator based on the air supply flow.
In the embodiment of the disclosure, by heating the liquid refrigerant of the gas-liquid separator, part of the liquid refrigerant which is heat-released and liquefied in the outdoor heat exchanger in the reverse cycle defrosting mode can absorb heat and vaporize again before flowing into the gas-liquid separator, so that the temperature and the flow of the gaseous refrigerant in the refrigerant which flows back to the compressor through the gas supplementing branch are changed; under the condition, the flow rate of the refrigerant which is divided to the air supply branch by the gas-liquid separator can be larger than or equal to the air supply flow rate through the heating operation of the liquid inlet refrigerant of the gas-liquid separator, so that the requirements for improving the compression performance of the compressor and the defrosting performance of the air conditioner are met.
In some embodiments, the air conditioner is provided with a heating device at the refrigerant liquid inlet pipeline of the gas-liquid separator in the reverse circulation defrosting mode, and the heating device is configured to controllably heat the refrigerant flowing through the refrigerant liquid inlet pipeline; therefore, in step S102, the heating operation of the heating device may be turned on based on the make-up gas flow control.
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.
In some optional embodiments, the controlling the heating operation of the liquid-in-refrigerant of the gas-liquid separator based on the make-up air flow rate in step S102 includes: and searching corresponding heating parameters from the heating association relation according to the air supply flow, and controlling the heating operation according to the heating parameters.
Under the condition of controlling the heating operation according to the heating parameters, the flow of the refrigerant which is divided to the air supplementing branch by the gas-liquid separator is greater than or equal to the air supplementing flow.
Optionally, the heating parameter comprises a heating rate or a heating time period.
The heating association relationship comprises a corresponding relationship between one or more gas supply flow rates and heating parameters. Illustratively, an alternative supplemental air flow rate versus heating parameter is shown in table 2, which, as shown below,
TABLE 2
In the corresponding relation, the heating rate and the air supply flow are positively correlated, and the heating time length and the air supply flow are positively correlated. That is, the more the make-up air flow rate required to be reached by the current working condition is, the more the gaseous refrigerant generated after heating is required to be heated, so that the heating rate and the heating time period are set to be higher values so as to increase the amount of the gaseous refrigerant generated by vaporization after heating.
Therefore, when the heating operation of the liquid-in-refrigerant of the gas-liquid separator is controlled in step S102, the heating parameter may be determined according to the make-up air flow rate in step S101, and then the heating operation may be adjusted according to the heating parameter.
In some optional embodiments, the control method for defrosting an air conditioner further comprises: and when the air conditioner runs in the reverse cycle defrosting mode, if the defrosting exit condition is met, controlling to exit the reverse cycle defrosting mode, and after the heating is continued for a set time, exiting the heating.
Here, when it is determined that the defrosting exit condition is satisfied, it indicates that the defrosting of the outdoor heat exchanger by the air conditioner is completed, and no frost or only a small amount of frost is formed on the outdoor heat exchanger of the air conditioner, so that the reverse cycle defrosting mode is controlled to exit, so as to avoid that the normal heating function of the indoor environment by the air conditioner is affected due to too much time occupied by the reverse cycle defrosting mode.
In the embodiment of the present disclosure, after the reverse cycle defrosting mode is exited, the air conditioner switches back to the heating mode again, and therefore the refrigerant flow directions in the refrigerant circulation circuit before and after switching are opposite, in the embodiment of the present disclosure, after the reverse cycle defrosting mode is exited, before the heating mode is switched back again, the heating is continuously maintained for a set time period, so that the refrigerant flowing in the flow direction defined by the reverse cycle defrosting mode can flow back to the compressor at a higher temperature before the mode switching, which not only can increase the temperature of the refrigerant for heating initially discharged by the compressor after the mode switching back to the heating mode, but also can effectively avoid the problems of pipeline vibration and the like caused by the collision of the flow directions of different refrigerants which are easy to occur when the two modes are switched.
In some alternative embodiments, the control unit may stop supplying air to the compressor when the air conditioner exits the reverse cycle defrosting mode.
In some alternative embodiments, the control may stop supplying air to the compressor when the set time is reached. In this way, the air conditioner can still keep the air replenishing operation on the compressor within the set time length so as to further improve the compression performance of the compressor when the heating mode is switched later.
Fig. 2 is a schematic structural diagram of a control device for defrosting 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. 2 and includes:
a processor (processor)200 and a memory (memory)201, and may further include a Communication Interface (Communication Interface)202 and a bus 203. The processor 200, the communication interface 202 and the memory 201 can communicate with each other through the bus 203. The communication interface 202 may be used for information transfer. The processor 200 may call logic instructions in the memory 201 to perform the control method for defrosting the air conditioner of the above embodiment.
In addition, the logic instructions in the memory 201 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 201 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 200 executes functional applications and data processing by executing program instructions/modules stored in the memory 201, that is, implements the control method for defrosting an air conditioner in the above-described method embodiment.
The memory 201 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 201 may include a high-speed random access memory, and may also include a nonvolatile memory.
Fig. 3 is a schematic structural diagram of an air conditioner provided in an embodiment of the present disclosure.
As shown in fig. 3, the present disclosure also provides an air conditioner, including:
the refrigerant circulation loop is formed by connecting an outdoor heat exchanger 11, an indoor heat exchanger 12, a throttling device 13 and a compressor 14 through refrigerant pipelines;
an air supplement branch 21, one end of which is communicated with an air supplement port of the compressor 14, and the other end of which is communicated with a gas-liquid separator 22 arranged between the indoor heat exchanger 12 and the outdoor heat exchanger 11; the air supply branch 21 is provided with a control valve 23;
the heating device 3 is arranged on the refrigerant liquid inlet pipeline of the gas-liquid separator 22 in the reverse cycle defrosting mode and is configured to heat the refrigerant flowing through the refrigerant liquid inlet pipeline;
and a control device (not shown in the figure) for defrosting the air conditioner, which is electrically connected with the control valve 23 and the heating device 3. Here, the control device for air conditioner defrosting is the control device shown in the foregoing embodiment.
The air conditioner adopting the structural design can perform heating operation on the liquid inlet refrigerant of the gas-liquid separator by controlling the air supply flow for supplying air to the compressor according to the air conditioner running bypass defrosting mode, not only can directly adjust the temperature and the flow of the refrigerant which becomes gaseous after heating and is then divided to be used for supplying air, but also can improve the temperature of the refrigerant flowing into the outdoor heat exchanger so as to improve the defrosting effect, thereby effectively reducing the problem that the defrosting capacity of the air conditioner is reduced along with the time caused by the running bypass defrosting mode.
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 air supplement flow when the air conditioner enters a reverse circulation defrosting mode and supplements air to a compressor; wherein, the air supplement comprises that at least part of the refrigerant circulation loop is controlled to flow back to the compressor along the air supplement branch through the gas-liquid separator; the air supply flow is obtained according to the return air temperature of the compressor, and the air supply flow and the return air temperature are in a negative correlation relationship;
controlling the heating operation of the liquid inlet refrigerant of the gas-liquid separator based on the air supply flow so that the flow of the refrigerant which is divided to an air supply branch by the gas-liquid separator is greater than or equal to the air supply flow; wherein the heating parameter of the heating operation is in positive correlation with the air supply flow.
2. The control method of claim 1, wherein the make-up air flow is obtained according to a return air temperature of the compressor, and comprises:
and searching the corresponding air supply flow from the association relation according to the return air temperature of the compressor.
3. The control method according to claim 1 or 2, wherein the controlling of the heating operation of the liquid refrigerant entering the gas-liquid separator based on the make-up air flow rate comprises:
and searching corresponding heating parameters from the heating association relation according to the air supply flow, and controlling the heating operation according to the heating parameters.
4. The control method according to claim 3, wherein the heating parameter includes a heating rate or a heating time period.
5. The control method according to claim 1, characterized by further comprising:
and when the air conditioner runs in a reverse cycle defrosting mode, if a defrosting exit condition is met, controlling to exit the reverse cycle defrosting mode, and after the heating is continued for a set time length, exiting the heating.
6. The control method according to claim 5, characterized by further comprising:
and when the set time is reached, controlling to stop supplying air to the compressor.
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;
one end of the air supplementing branch is communicated with an air supplementing port of the compressor, and the other end of the air supplementing branch is communicated with a gas-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger; the air supply branch is provided with a control valve;
the heating device is arranged on a refrigerant liquid inlet pipeline of the gas-liquid separator in a reverse circulation defrosting mode and is configured to heat a refrigerant flowing through the refrigerant liquid inlet pipeline;
a control for defrosting an air conditioner in accordance with claim 7 electrically connected to said control valve and said heating means.
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| CN113639491B (en) * | 2021-07-07 | 2023-03-31 | 青岛海尔空调电子有限公司 | Method and device for defrosting heat pump equipment and hot water unit |
| CN113685969B (en) * | 2021-07-26 | 2023-03-21 | 重庆海尔空调器有限公司 | Method and device for controlling defrosting of air conditioner and air conditioner |
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