CN108224678A - A kind of air-conditioning and defrosting control method - Google Patents
A kind of air-conditioning and defrosting control method Download PDFInfo
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- CN108224678A CN108224678A CN201711464037.XA CN201711464037A CN108224678A CN 108224678 A CN108224678 A CN 108224678A CN 201711464037 A CN201711464037 A CN 201711464037A CN 108224678 A CN108224678 A CN 108224678A
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- defrosting
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- 238000010257 thawing Methods 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004378 air conditioning Methods 0.000 title abstract description 6
- 239000003507 refrigerant Substances 0.000 claims description 100
- 238000004891 communication Methods 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 230000008569 process Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a kind of air-conditioning and defrosting control methods, belong to air-conditioning technical field.The outdoor heat exchanger of air-conditioning includes at least one superposed first heat exchanger fin group and at least one the second heat exchanger fin group positioned at lower part；Air-conditioning further includes controller, and controller is used for：Judge whether to meet preset Defrost operation condition；If it is satisfied, then control operation of air conditioner defrosting mode, wherein, when being run with defrosting mode, the connection of control the first heat exchanger fin group of conducting and medium circulation pipeline blocks the connection of the second heat exchanger fin group and medium circulation pipeline；After the defrosting of the first heat exchanger fin group is completed, control blocks the connection of the first heat exchanger fin group and medium circulation pipeline, and the connection of the second heat exchanger fin group and medium circulation pipeline is connected.By first up and then down defrosting sequence, the whole defrosting time of outdoor heat exchanger can be shortened, and can be to avoid appearance of the frost water that the heat exchanger fin group on top is melted the heat exchanger fin group regelation of lower part the problem of.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a defrosting control method.
Background
The multi-connected air conditioner has the characteristics of flexible connection, hidden installation of an internal machine, high performance and the like, and is generally applied to commercial places such as large-scale shopping malls, office buildings, hotels and the like; a plurality of indoor units of the multi-connected air conditioner generally share the same large outdoor unit, more frost is easily condensed on a heat exchanger of the outdoor unit with a larger volume under winter or severe cold weather conditions, so that the heat exchange efficiency of the heat exchanger is influenced, at the moment, the air conditioner needs to operate a defrosting mode to defrost the heat exchanger of the outdoor unit, generally, the control modes of the outdoor heat exchanger during defrosting operation of the air conditioner are basically the same, namely, the refrigerant flow of all heat exchanger flow paths of the outdoor unit during defrosting operation is almost the same and the outdoor heat exchanger is synchronously started and stopped; for the lower half part of the heat exchanger, frost water after defrosting mainly drops on the chassis, and for the upper half part of the heat exchanger, melted frost water can drop on the chassis only through the lower half part, and the flow path is longer; therefore, when the air conditioner stops operating the defrosting mode, the melted frost water in the upper half part is easily influenced by the outdoor temperature and is condensed in the lower half part again, so the actual defrosting effect of the defrosting control mode of synchronous start and stop is not good, and the problem that the frost condensation in the lower half part of the outdoor heat exchanger is increased is easily caused.
Disclosure of Invention
The invention provides an air conditioner and a defrosting control method, and aims to solve the problem that the frost condensation of the lower half part of an outdoor heat exchanger is increased easily in a conventional air conditioner defrosting control mode. 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 a first aspect of the invention, an air conditioner is provided, wherein an outdoor heat exchanger of the air conditioner comprises at least one first heat exchange fin group positioned at the upper part and at least one second heat exchange fin group positioned at the lower part, and the first heat exchange fin group and the second heat exchange fin group are respectively communicated with a refrigerant circulating pipeline of the air conditioner;
the air conditioner further includes a controller for: judging whether a preset defrosting operation condition is met or not; if the first heat exchange fin group and the second heat exchange fin group are communicated, controlling the air conditioner to operate in a defrosting mode, wherein when the air conditioner operates in the defrosting mode, the first heat exchange fin group is controlled to be communicated with the refrigerant circulation pipeline, and the second heat exchange fin group is controlled to be blocked from being communicated with the refrigerant circulation pipeline; after the defrosting of the first heat exchange fin group is finished, the communication between the first heat exchange fin group and the refrigerant circulating pipeline is blocked, and the communication between the second heat exchange fin group and the refrigerant circulating pipeline is conducted.
In an alternative embodiment, the preset defrost operating conditions include: receiving a control instruction of an air conditioner operation defrosting mode input by a user; alternatively, the outdoor ambient temperature is below the set temperature threshold.
In an optional embodiment, the first heat exchange fin group is arranged on a first outdoor heat exchange branch communicated with the refrigerant circulation pipeline, the second heat exchange fin group is arranged on a second outdoor heat exchange branch communicated with the refrigerant circulation pipeline, and the first outdoor heat exchange branch is connected with the second outdoor heat exchange branch in parallel, wherein a first control valve is arranged on the first outdoor heat exchange branch, and a second control valve is arranged on the second outdoor heat exchange branch;
the controller is specifically configured to: the first control valve is used for controlling the opening of the first outdoor heat exchange branch and the second control valve is used for controlling the closing of the second outdoor heat exchange branch; and the first control valve is used for controlling the closing of the first outdoor heat exchange branch and the second control valve is used for controlling the opening of the second outdoor heat exchange branch.
In an optional embodiment, the air conditioner further comprises a four-way valve for controlling the flow direction of the refrigerant in the refrigerant circulation pipeline, wherein the four-way valve is provided with a first valve position for communicating the exhaust port of the compressor with the outdoor heat exchanger and communicating the suction port with the indoor heat exchanger, and a second valve position for communicating the exhaust port of the compressor with the indoor heat exchanger and communicating the suction port with the outdoor heat exchanger;
the controller is specifically configured to: and controlling the four-way valve to be switched to be in a first valve position state.
In an alternative embodiment, the controller is further configured to:
acquiring the accumulated time of the defrosting mode of the air conditioner;
and when the accumulated time reaches a preset time threshold value, judging that the defrosting of the first heat exchange plate group is finished.
According to a second aspect of the present invention, the present invention further provides an air conditioner defrosting control method, where an outdoor heat exchanger of an air conditioner includes at least one first heat exchanger fin group located at an upper portion and at least one second heat exchanger fin group located at a lower portion, and the first heat exchanger fin group and the second heat exchanger fin group are respectively communicated with a refrigerant circulation pipeline of the air conditioner;
the control method comprises the following steps: judging whether a preset defrosting operation condition is met or not; if the first heat exchange fin group and the second heat exchange fin group are communicated, controlling the air conditioner to operate in a defrosting mode, wherein when the air conditioner operates in the defrosting mode, the first heat exchange fin group is controlled to be communicated with the refrigerant circulation pipeline, and the second heat exchange fin group is controlled to be blocked from being communicated with the refrigerant circulation pipeline; after the defrosting of the first heat exchange fin group is finished, the communication between the first heat exchange fin group and the refrigerant circulating pipeline is blocked, and the communication between the second heat exchange fin group and the refrigerant circulating pipeline is conducted.
In an alternative embodiment, the preset defrost operating conditions include: receiving a control instruction of an air conditioner operation defrosting mode input by a user; alternatively, the outdoor ambient temperature is below the set temperature threshold.
In an optional embodiment, the first heat exchange fin group is arranged on a first outdoor heat exchange branch communicated with the refrigerant circulation pipeline, the second heat exchange fin group is arranged on a second outdoor heat exchange branch communicated with the refrigerant circulation pipeline, and the first outdoor heat exchange branch is connected with the second outdoor heat exchange branch in parallel, wherein a first control valve is arranged on the first outdoor heat exchange branch, and a second control valve is arranged on the second outdoor heat exchange branch;
control switches on first fin group and refrigerant circulation pipeline's intercommunication, blocks second fin group and refrigerant circulation pipeline's intercommunication, includes: the first control valve is used for controlling the opening of the first outdoor heat exchange branch and the second control valve is used for controlling the closing of the second outdoor heat exchange branch; control blocks the intercommunication of first fin group and refrigerant circulation pipeline, switches on the intercommunication of second fin group and refrigerant circulation pipeline, includes: and the first control valve of the first outdoor heat exchange branch is controlled to be closed, and the second control valve of the second outdoor heat exchange branch is controlled to be opened.
In an optional embodiment, the air conditioner further comprises a four-way valve for controlling the flow direction of the refrigerant in the refrigerant circulation pipeline, wherein the four-way valve is provided with a first valve position for communicating the exhaust port of the compressor with the outdoor heat exchanger and communicating the suction port with the indoor heat exchanger, and a second valve position for communicating the exhaust port of the compressor with the indoor heat exchanger and communicating the suction port with the outdoor heat exchanger;
controlling the air conditioner to operate in a defrosting mode, comprising: and controlling the four-way valve to be switched to be in a first valve position state.
In an optional embodiment, before controlling to block the communication between the first fin group and the refrigerant circulation pipeline and to conduct the communication between the second fin group and the refrigerant circulation pipeline, the control method further includes:
acquiring the accumulated time of the defrosting mode of the air conditioner;
and when the accumulated time reaches a preset time threshold value, judging that the defrosting of the first heat exchange plate group is finished.
The invention adopts the technical scheme and has the beneficial effects that:
the air conditioner provided by the invention considers that the frost water generated by defrosting can flow from top to bottom under the influence of gravity, so that the on-off control of the refrigerant flow of different heat exchange plate groups of the outdoor heat exchanger is performed from top to bottom, and the heat absorbed by the outer heat exchanger and the heat generated by the compressor can more intensively defrost the heat exchange plate group which is conducted by the current pipeline by sequentially switching and conducting or blocking the corresponding refrigerant loop, and more directly defrost the part of the heat exchanger; in addition, through the defrosting sequence from top to bottom, the frost water melted by the heat exchange plate group at the upper part can continuously flow downwards along the outdoor heat exchanger, the defrosting action of the heat exchange plate group at the lower part can be extracted and preheated, and the frost water generated by the defrosting of the heat exchange plate group at the upper part can melt a part of the frost of the heat exchange plate group at the lower part, so that the whole defrosting time of the outdoor heat exchanger can be shortened, and the problem that the frost water melted by the heat exchange plate group at the upper part is re-condensed at the heat exchange plate group at the lower part can be avoided.
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 schematic structural view of an air conditioner of the present invention according to an exemplary embodiment;
FIG. 2 is a flow chart illustrating the defrost control method of the present invention according to one exemplary embodiment.
Wherein, 1, indoor unit; 11. an indoor heat exchanger;
2. an outdoor unit; 21. an outdoor heat exchanger; 211. a first heat exchanger fin group; 212. the second heat exchange plate group; 22. a compressor; 23. a four-way valve;
3. a refrigerant circulation line; 31. a first outdoor heat exchange branch; 32. a second outdoor heat exchange branch;
41. a first control valve; 42. a second control valve.
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 schematic structural view of an air conditioner of the present invention according to an exemplary embodiment.
As shown in fig. 1, the present invention provides an air conditioner, which includes an indoor unit set 1 and an outdoor unit set 2, wherein the indoor unit set 1 includes one or more independent indoor units, each indoor unit has an indoor heat exchanger 11, the outdoor unit set 2 includes an outdoor unit, and the outdoor unit includes an outdoor heat exchanger 21; the indoor heat exchangers 11 of the indoor units are connected in parallel to the refrigerant circulation line 3 of the air conditioner, and can perform high and low temperature refrigerant circulation exchange with the outdoor heat exchanger 21 of the outdoor unit through the refrigerant circulation line 3, respectively. The indoor units may be disposed in different or the same indoor scene, and the outdoor unit is disposed in an outdoor scene, in the following embodiments, the multi-unit air conditioner composed of the indoor units and the outdoor unit is mainly explained.
Here, the outdoor heat exchanger 21 of the air conditioner includes a plurality of heat exchanger fin groups, including at least one first heat exchanger fin group 211 located at the upper part and at least one second heat exchanger fin group 212 located at the lower part, where the upper part and the lower part refer to the arrangement relationship of the two heat exchanger fin groups at the spatial height position in the outdoor unit, and the second heat exchanger fin group 212 is located below the first heat exchanger fin group 211; of course, the air conditioner applicable to the present invention is not limited to the structural form of the outdoor heat exchanger 21 with the upper and lower layers, and can also be applied to the form of the outdoor heat exchanger 21 including the heat exchange plate group in the middle position, such as the heat exchange plate group with the upper, middle and lower layers. Here, for the structural form of the outdoor heat exchanger 21 with more than two layers, one or more heat exchanger fin groups above may be divided into the first heat exchanger fin group 211, and the others are divided into the second heat exchanger fin group 212, for example, the upper and middle heat exchanger fin groups are divided into the first heat exchanger fin group 211, and the lower heat exchanger fin group is divided into the second heat exchanger fin group 212; or, one or more heat exchanger fin groups located below are divided into the second heat exchanger fin group 212, and the others are divided into the first heat exchanger fin group 211, for example, the middle and lower heat exchanger fin groups are divided into the second heat exchanger fin group 212, and the upper heat exchanger fin group is divided into the first heat exchanger fin group 211.
In this embodiment, the first fin group 211 and the second fin group 212 are respectively communicated with a refrigerant circulation pipeline 3 of the air conditioner, and a refrigerant in the refrigerant circulation pipeline 3 can respectively flow through the first fin group 211 and the second fin group 212, and can respectively defrost by using heat of the refrigerant flowing through different fin groups when the air conditioner operates in a defrosting mode.
In an alternative embodiment, the defrosting mode of the air conditioner operation is a conventional defrosting mode, specifically, the defrosting mode includes that a refrigerant circulation flow path of the air conditioner is switched to a refrigerant flow direction same as that of the refrigeration mode, that is, the refrigerant discharged from an exhaust port of the compressor 22 flows through the outdoor heat exchanger 21 first, then flows to the indoor heat exchanger 11, and finally flows back to a suction port of the compressor 22 from the indoor heat exchanger 11; in this process, the temperature of the refrigerant discharged from the discharge port carries a lot of heat, and the temperature is high, so that when the refrigerant passes through the outdoor heat exchanger 21, the heat of the high-temperature refrigerant is transferred to the outer surface of the outdoor heat exchanger 21, so that the frost condensed on the outer surface of the outdoor heat exchanger 21 absorbs the heat and then melts, thereby achieving the purpose of defrosting.
Specifically, the air conditioner of the present invention further includes a controller (not shown in the drawings) for controlling a defrosting operation of the outdoor heat exchanger 21; the controller is used for:
judging whether a preset defrosting operation condition is met or not;
in one embodiment, the predetermined defrost operating conditions include: and receiving a control instruction of the defrosting mode of the air conditioner operation input by a user. Generally, when the amount of condensed ice on the outdoor heat exchanger 21 of the outdoor unit of the air conditioner is too much, the amount of heat exchange between the outdoor heat exchanger 21 and the outdoor environment is reduced, and the heating performance of the air conditioner itself is reduced, so that a user can send a control instruction for starting a defrosting mode to the air conditioner main body through air conditioner accessories such as a remote controller and a control panel, and after receiving the control, the air conditioner can determine that a preset defrosting operation condition is satisfied.
Alternatively, in another embodiment, the outdoor unit of the air conditioner is generally provided with an outdoor ambient temperature sensor for detecting the outdoor ambient temperature; when the outdoor environment temperature is low, the icing and frost-condensation temperature occurs on the outdoor heat exchanger 21, so that the icing state on the outdoor heat exchanger 21 can be estimated to a certain extent according to the actual change condition of the outdoor environment temperature, and therefore, in the embodiment, the preset defrosting operation condition includes that the outdoor environment temperature is lower than the set temperature threshold; the set temperature threshold is a threshold parameter that is easily frozen in the outdoor heat exchanger 21 and is measured in advance through experiments and the like, and when the outdoor temperature reaches or is lower than the set temperature threshold, the outdoor heat exchanger 21 is frozen. Therefore, when the outdoor environment temperature detected by the outdoor environment temperature sensor is lower than the pre-stored set temperature threshold value through comparison of the controller, the condition that the preset defrosting operation condition is met can be judged.
Preferably, the air conditioner may further include a defrosting sensor for detecting a coil temperature of the outdoor heat exchanger 21, so as to determine whether the outer surface of the outdoor heat exchanger 21 is likely to freeze or frost according to an actual coil temperature of the outdoor heat exchanger 21; therefore, the controller can also preset a coil temperature threshold value so as to judge whether the preset defrosting operation condition is met or not according to the comparison result of the coil temperature threshold value and the actual coil temperature. Compared with the comparison mode of the outdoor environment temperature and the set temperature threshold value, the actual coil temperature detected by the defrosting sensor is closer to the outer surface temperature of the outdoor heat exchanger 21 with the problem of ice and frost condensation, so that the judgment and control precision can be effectively improved.
If the preset defrosting operation condition is met, controlling the air conditioner to operate in a defrosting mode, wherein when the air conditioner operates in the defrosting mode, a high-temperature refrigerant discharged by the compressor 22 flows to the outdoor heat exchanger 21 firstly; meanwhile, the communication between the first heat exchanger fin group 211 and the refrigerant circulation pipeline 3 is controlled to be conducted, at this time, the first heat exchanger fin group 211 is communicated with the refrigerant circulation pipeline 3, a high-temperature refrigerant discharged by the compressor 22 can flow through the first heat exchanger fin group, and the first heat exchanger fin group 211 is defrosted by the heat of the high-temperature refrigerant; and, the communication between the second heat exchanger fin group 212 and the refrigerant circulation pipeline 3 is blocked, at this time, the second heat exchanger fin group 212 is not communicated with the refrigerant circulation pipeline 3, and the high-temperature refrigerant discharged from the compressor 22 does not flow through the second heat exchanger fin group 212.
After defrosting of the first heat exchanger fin group 211 is completed, the communication between the first heat exchanger fin group 211 and the refrigerant circulation pipeline 3 is controlled to be blocked, at this time, the first heat exchanger fin group 211 is not communicated with the refrigerant circulation pipeline 3, and a high-temperature refrigerant discharged by the compressor 22 does not flow through the second heat exchanger fin group 212; and, the communication between the second heat exchanger fin group 212 and the refrigerant circulation pipeline 3 is conducted, at this time, the second heat exchanger fin group 212 is communicated with the refrigerant circulation pipeline 3, the high-temperature refrigerant discharged from the compressor 22 can flow through the second heat exchanger fin group, and the second heat exchanger fin group 212 is defrosted by the heat of the high-temperature refrigerant.
Through the defrosting sequence from top to bottom, the frost water melted by the upper heat exchange plate group can continuously flow downwards along the outdoor heat exchanger 21, preheating can be extracted for the defrosting action of the lower heat exchange plate group, and the frost water generated by the defrosting of the upper heat exchange plate group can melt a part of the frost of the lower heat exchange plate group, so that the overall defrosting time of the outdoor heat exchanger 21 can be shortened, and the problem that the frost water melted by the upper heat exchange plate group is re-condensed in the lower heat exchange plate group can be avoided.
In the air conditioning structure shown in the present invention, the first heat exchanger fin group 211 is disposed on the first outdoor heat exchange branch 31 communicated with the refrigerant circulation pipeline 3, the second heat exchanger fin group 212 is disposed on the second outdoor heat exchange branch 32 communicated with the refrigerant circulation pipeline 3, the first outdoor heat exchange branch 31 is connected in parallel with the second outdoor heat exchange branch 32, wherein the first outdoor heat exchange branch 31 is provided with a first control valve 41, and the second outdoor heat exchange branch 32 is provided with a second control valve 42; in an embodiment, the first control valve 41 is disposed on one side of the liquid inlet end of the first heat exchanger plate group 211, and the second outdoor heat exchange branch 32 is disposed on one side of the liquid inlet end of the second heat exchanger plate group 212.
Thus, in the first stage of defrosting first heat exchanger fin group 211, the controller is specifically configured to: a first control valve 41 for controlling the opening of the first outdoor heat exchange branch 31 and a second control valve 42 for controlling the closing of the second outdoor heat exchange branch 32; in a second stage of defrosting second heat exchanger pack 212, the controller is specifically configured to: the first control valve 41 of the first outdoor heat exchange branch 31 is controlled to be closed, and the second control valve 42 of the second outdoor heat exchange branch 32 is controlled to be opened.
In the embodiment of the present invention, the air conditioner further includes a four-way valve 23 for controlling the flow direction of the refrigerant in the refrigerant circulation pipeline 3, the four-way valve 23 has a first valve position for communicating the exhaust port of the compressor 22 with the outdoor heat exchanger 21 and communicating the suction port with the indoor heat exchanger 11, and a second valve position for communicating the exhaust port of the compressor 22 with the indoor heat exchanger 11 and communicating the suction port with the outdoor heat exchanger 21;
thus, when the air conditioner needs to operate in the defrosting mode, the controller can control the four-way valve 23 to be switched to the state of the first valve position, so that the exhaust port of the compressor 22 is communicated with the outdoor heat exchanger 21, the suction port is communicated with the indoor heat exchanger 11, that is, the refrigerant circulation pipeline 3 can be switched to the refrigerant flow direction same as that of the refrigerating mode, and the high-temperature refrigerant discharged by the compressor 22 firstly flows through the outdoor heat exchanger 21 and defrosts the outdoor heat exchanger 21.
In an embodiment of the present invention, the controller is further configured to determine whether the first heat exchanger group 211 completes defrosting, so as to switch to defrosting the second heat exchanger group 212 after the first heat exchanger group 211 completes defrosting; specifically, the process that the controller determines that the first heat exchanger group 211 completes defrosting includes:
acquiring the accumulated time of the defrosting mode of the air conditioner;
generally, when the air conditioner satisfies a preset defrosting operation condition, the air conditioner is switched from a heating mode to a defrosting mode, and at this time, the controller performs timing.
When the accumulated time reaches a preset time threshold, it is determined that the defrosting of the first heat exchanger group 211 is completed.
The controller of the present invention further pre-stores one or more time thresholds, where the time thresholds are the defrosting durations required by the first heat exchanger set 211 to substantially complete defrosting under different outdoor temperature conditions determined in advance through experiments, and therefore, by comparing the accumulated time of the air conditioner operation defrosting mode with the preset time threshold, it can be determined whether the first heat exchanger set 211 substantially completes defrosting under the current outdoor temperature condition; when it is determined that first heat exchanger fin group 211 substantially completes defrosting, it may switch to defrosting second heat exchanger fin group 212.
Or, in another embodiment of the present invention, the controller may further determine whether defrosting is completed according to the current coil temperature of the first heat exchanger; specifically, the process that the controller determines that the first heat exchanger group 211 completes defrosting includes: acquiring the current coil temperature of the first heat exchanger plate group 211 detected by the defrosting sensor; when the current coil temperature reaches the preset temperature threshold, it is determined that defrosting of first heat exchanger group 211 is completed.
FIG. 2 is a first flowchart of the defrost control method of the present invention shown in accordance with an exemplary embodiment;
the invention also provides an air conditioner defrosting control method, wherein an applied outdoor heat exchanger of the air conditioner comprises at least one first heat exchange fin group positioned at the upper part and at least one second heat exchange fin group positioned at the lower part, and the first heat exchange fin group and the second heat exchange fin group are respectively communicated with a refrigerant circulating pipeline of the air conditioner;
the control method comprises the following steps:
s201, judging whether preset defrosting operation conditions are met, if so, executing the step S202, and if not, repeatedly executing the step S201;
s202, controlling the air conditioner to operate in a defrosting mode,
s203, controlling and conducting communication between the first heat exchange plate set and the refrigerant circulating pipeline, and blocking communication between the second heat exchange plate set and the refrigerant circulating pipeline;
s204, judging whether defrosting is finished in the first heat exchange plate group, if yes, executing the step S205, if not, keeping the on-off state of the step S203 unchanged, and repeating the judging process;
s205, controlling to block the communication between the first heat exchange plate group and the refrigerant circulating pipeline and conduct the communication between the second heat exchange plate group and the refrigerant circulating pipeline;
and the air conditioner exits the defrosting mode and is switched to the heating mode again to operate until the second heat exchange plate group finishes defrosting.
In the embodiment of the present invention, the defrosting operation conditions preset in the determination process of step S201 include:
receiving a control instruction of an air conditioner operation defrosting mode input by a user; or,
the outdoor environment temperature is lower than the set temperature threshold.
In the embodiment of the invention, a heat exchange plate group of a second air conditioner is arranged on a first outdoor heat exchange branch communicated with a refrigerant circulating pipeline, a second heat exchange plate group is arranged on a second outdoor heat exchange branch communicated with the refrigerant circulating pipeline, the first outdoor heat exchange branch is connected with the second outdoor heat exchange branch in parallel, wherein a first control valve is arranged on the first outdoor heat exchange branch, and a second control valve is arranged on the second outdoor heat exchange branch;
therefore, the step S203 of controlling to communicate the first heat exchanger fin group with the refrigerant circulation pipeline and blocking the communication between the second heat exchanger fin group and the refrigerant circulation pipeline includes: the first control valve is used for controlling the opening of the first outdoor heat exchange branch and the second control valve is used for controlling the closing of the second outdoor heat exchange branch;
in step S205, blocking the communication between the first heat exchanger fin group and the refrigerant circulation pipeline and conducting the communication between the second heat exchanger fin group and the refrigerant circulation pipeline includes: and the first control valve of the first outdoor heat exchange branch is controlled to be closed, and the second control valve of the second outdoor heat exchange branch is controlled to be opened.
In the embodiment of the invention, the air conditioner also comprises a four-way valve for controlling the flow direction of the refrigerant in a refrigerant circulating pipeline, wherein the four-way valve is provided with a first valve position for communicating an exhaust port of the compressor with the outdoor heat exchanger and communicating an air suction port with the indoor heat exchanger, and a second valve position for communicating the exhaust port of the compressor with the indoor heat exchanger and communicating the air suction port with the outdoor heat exchanger;
therefore, the controlling of the air conditioner operation defrosting mode in step S202 includes: and controlling the four-way valve to be switched to be in a first valve position state.
In the embodiment of the present invention, the step of determining whether the defrosting of the first heat exchanger group is completed in step S204 further includes:
acquiring the accumulated time of the defrosting mode of the air conditioner;
and when the accumulated time reaches a preset time threshold value, judging that the defrosting of the first heat exchange plate group is finished.
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 (10)
1. An air conditioner is characterized in that an outdoor heat exchanger of the air conditioner comprises at least one first heat exchange fin group positioned at the upper part and at least one second heat exchange fin group positioned at the lower part, and the first heat exchange fin group and the second heat exchange fin group are respectively communicated with a refrigerant circulating pipeline of the air conditioner; the air conditioner further includes a controller for:
judging whether a preset defrosting operation condition is met or not;
if the defrosting mode is met, controlling an air conditioner to operate in a defrosting mode, wherein when the air conditioner operates in the defrosting mode, the communication between the first heat exchange plate set and the refrigerant circulating pipeline is controlled to be conducted, and the communication between the second heat exchange plate set and the refrigerant circulating pipeline is blocked; after the defrosting of the first heat exchange plate group is finished, the communication between the first heat exchange plate group and the refrigerant circulating pipeline is blocked, and the communication between the second heat exchange plate group and the refrigerant circulating pipeline is conducted.
2. The air conditioner of claim 1, wherein the preset defrost operating conditions include:
receiving a control instruction of an air conditioner operation defrosting mode input by a user; or,
the outdoor environment temperature is lower than the set temperature threshold.
3. The air conditioner according to claim 1, wherein the first heat exchanger fin set is disposed on a first outdoor heat exchanging branch communicated with the refrigerant circulating line, the second heat exchanger fin set is disposed on a second outdoor heat exchanging branch communicated with the refrigerant circulating line, and the first outdoor heat exchanging branch is connected in parallel with the second outdoor heat exchanging branch, wherein a first control valve is disposed on the first outdoor heat exchanging branch, and a second control valve is disposed on the second outdoor heat exchanging branch;
the controller is specifically configured to:
the first control valve of the first outdoor heat exchange branch is controlled to be opened, and the second control valve of the second outdoor heat exchange branch is controlled to be closed; and
and the first control valve of the first outdoor heat exchange branch is controlled to be closed, and the second control valve of the second outdoor heat exchange branch is controlled to be opened.
4. The air conditioner according to claim 1, further comprising a four-way valve for controlling a flow direction of the refrigerant in the refrigerant circulation line, the four-way valve having a first valve position for communicating an exhaust port of the compressor with the outdoor heat exchanger and a suction port with the indoor heat exchanger, and a second valve position for communicating the exhaust port of the compressor with the indoor heat exchanger and the suction port with the outdoor heat exchanger;
the controller is specifically configured to:
and controlling the four-way valve to be switched to be in the first valve position.
5. The air conditioner of claim 1, wherein the controller is further configured to:
acquiring the accumulated time of the air conditioner in the defrosting mode;
and when the accumulated time reaches a preset time threshold value, judging that the defrosting of the first heat exchange plate set is finished.
6. The defrosting control method of the air conditioner is characterized in that an outdoor heat exchanger of the air conditioner comprises at least one first heat exchange fin group positioned at the upper part and at least one second heat exchange fin group positioned at the lower part, wherein the first heat exchange fin group and the second heat exchange fin group are respectively communicated with a refrigerant circulating pipeline of the air conditioner; the control method comprises the following steps:
judging whether a preset defrosting operation condition is met or not;
if the defrosting mode is met, controlling an air conditioner to operate in a defrosting mode, wherein when the air conditioner operates in the defrosting mode, the communication between the first heat exchange plate set and the refrigerant circulating pipeline is controlled to be conducted, and the communication between the second heat exchange plate set and the refrigerant circulating pipeline is blocked; after the defrosting of the first heat exchange plate group is finished, the communication between the first heat exchange plate group and the refrigerant circulating pipeline is blocked, and the communication between the second heat exchange plate group and the refrigerant circulating pipeline is conducted.
7. The control method of claim 6, wherein the preset defrost operating conditions include:
receiving a control instruction of an air conditioner operation defrosting mode input by a user; or,
the outdoor environment temperature is lower than the set temperature threshold.
8. The control method according to claim 6, wherein the first heat exchanger fin set is disposed on a first outdoor heat exchange branch communicated with the refrigerant circulation pipeline, the second heat exchanger fin set is disposed on a second outdoor heat exchange branch communicated with the refrigerant circulation pipeline, and the first outdoor heat exchange branch is connected in parallel with the second outdoor heat exchange branch, wherein a first control valve is disposed on the first outdoor heat exchange branch, and a second control valve is disposed on the second outdoor heat exchange branch;
the control switches on the communication between the first heat exchange plate group and the refrigerant circulating pipeline, and blocks the communication between the second heat exchange plate group and the refrigerant circulating pipeline, and the control method comprises the following steps:
the first control valve of the first outdoor heat exchange branch is controlled to be opened, and the second control valve of the second outdoor heat exchange branch is controlled to be closed;
the control blocks the first heat exchange sheet group and the refrigerant circulation pipeline's intercommunication, switches on the second heat exchange sheet group with the refrigerant circulation pipeline's intercommunication includes:
and the first control valve of the first outdoor heat exchange branch is controlled to be closed, and the second control valve of the second outdoor heat exchange branch is controlled to be opened.
9. The control method according to claim 6, wherein the air conditioner further comprises a four-way valve for controlling a flow direction of the refrigerant in the refrigerant circulation line, the four-way valve having a first valve position for communicating the discharge port of the compressor with the outdoor heat exchanger and communicating the suction port with the indoor heat exchanger, and a second valve position for communicating the discharge port of the compressor with the indoor heat exchanger and communicating the suction port with the outdoor heat exchanger;
the defrosting mode for controlling the operation of the air conditioner comprises the following steps:
and controlling the four-way valve to be switched to be in the first valve position.
10. The control method according to claim 6, wherein before the controlling blocks the communication between the first fin group and the refrigerant circulation pipeline and conducts the communication between the second fin group and the refrigerant circulation pipeline, the control method further comprises:
acquiring the accumulated time of the air conditioner in the defrosting mode;
and when the accumulated time reaches a preset time threshold value, judging that the defrosting of the first heat exchange plate set is finished.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464037.XA CN108224678A (en) | 2017-12-28 | 2017-12-28 | A kind of air-conditioning and defrosting control method |
| PCT/CN2018/108680 WO2019128356A1 (en) | 2017-12-28 | 2018-09-29 | Air conditioner and defrosting control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711464037.XA CN108224678A (en) | 2017-12-28 | 2017-12-28 | A kind of air-conditioning and defrosting control method |
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| WO (1) | WO2019128356A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109539477A (en) * | 2018-10-31 | 2019-03-29 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its defrosting control method |
| WO2019128356A1 (en) * | 2017-12-28 | 2019-07-04 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method therefor |
| CN110030757A (en) * | 2019-03-26 | 2019-07-19 | 青岛海尔空调电子有限公司 | Multi-gang air-conditioner and its control method |
| CN110332653A (en) * | 2019-07-10 | 2019-10-15 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method, device and equipment |
| CN110762746A (en) * | 2018-07-10 | 2020-02-07 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method thereof |
| CN111397097A (en) * | 2020-04-03 | 2020-07-10 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner and air conditioner |
| CN112628887A (en) * | 2020-11-24 | 2021-04-09 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method, storage medium and control device thereof |
| CN113357843A (en) * | 2020-03-04 | 2021-09-07 | 青岛海尔空调电子有限公司 | Air conditioning system and defrosting control method thereof |
Families Citing this family (2)
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| CN112539520B (en) * | 2020-12-17 | 2021-10-22 | 珠海格力电器股份有限公司 | Defrosting control method and device and multi-split air conditioner |
| CN115419965B (en) * | 2022-09-14 | 2024-08-09 | 珠海格力电器股份有限公司 | Air conditioner and control method and device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09318206A (en) * | 1996-05-28 | 1997-12-12 | Sanyo Electric Co Ltd | Heat pump type air conditioner |
| CN105627432A (en) * | 2015-12-25 | 2016-06-01 | 珠海格力电器股份有限公司 | Air conditioning system and defrosting control method thereof |
| WO2016166801A1 (en) * | 2015-04-13 | 2016-10-20 | 三菱電機株式会社 | Air conditioning device |
| CN106369750A (en) * | 2016-09-08 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and defrosting control device of air conditioner and air conditioner |
| CN106871477A (en) * | 2017-03-13 | 2017-06-20 | 合肥美的暖通设备有限公司 | Defroster, source pump and its Defrost method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001059664A (en) * | 1999-08-20 | 2001-03-06 | Fujitsu General Ltd | Air conditioner |
| CN102721149A (en) * | 2012-05-08 | 2012-10-10 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN108224678A (en) * | 2017-12-28 | 2018-06-29 | 青岛海尔空调电子有限公司 | A kind of air-conditioning and defrosting control method |
-
2017
- 2017-12-28 CN CN201711464037.XA patent/CN108224678A/en active Pending
-
2018
- 2018-09-29 WO PCT/CN2018/108680 patent/WO2019128356A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09318206A (en) * | 1996-05-28 | 1997-12-12 | Sanyo Electric Co Ltd | Heat pump type air conditioner |
| WO2016166801A1 (en) * | 2015-04-13 | 2016-10-20 | 三菱電機株式会社 | Air conditioning device |
| CN105627432A (en) * | 2015-12-25 | 2016-06-01 | 珠海格力电器股份有限公司 | Air conditioning system and defrosting control method thereof |
| CN106369750A (en) * | 2016-09-08 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and defrosting control device of air conditioner and air conditioner |
| CN106871477A (en) * | 2017-03-13 | 2017-06-20 | 合肥美的暖通设备有限公司 | Defroster, source pump and its Defrost method |
Cited By (11)
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|---|---|---|---|---|
| WO2019128356A1 (en) * | 2017-12-28 | 2019-07-04 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method therefor |
| CN110762746A (en) * | 2018-07-10 | 2020-02-07 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method thereof |
| CN110762746B (en) * | 2018-07-10 | 2021-05-25 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method thereof |
| CN109539477A (en) * | 2018-10-31 | 2019-03-29 | 青岛海尔空调电子有限公司 | Multi-online air-conditioning system and its defrosting control method |
| CN110030757A (en) * | 2019-03-26 | 2019-07-19 | 青岛海尔空调电子有限公司 | Multi-gang air-conditioner and its control method |
| CN110332653A (en) * | 2019-07-10 | 2019-10-15 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method, device and equipment |
| CN110332653B (en) * | 2019-07-10 | 2020-07-24 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method, device and equipment |
| CN113357843A (en) * | 2020-03-04 | 2021-09-07 | 青岛海尔空调电子有限公司 | Air conditioning system and defrosting control method thereof |
| CN111397097A (en) * | 2020-04-03 | 2020-07-10 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner and air conditioner |
| CN111397097B (en) * | 2020-04-03 | 2022-12-27 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner and air conditioner |
| CN112628887A (en) * | 2020-11-24 | 2021-04-09 | 青岛海尔空调电子有限公司 | Air conditioner and defrosting control method, storage medium and control device thereof |
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Application publication date: 20180629 |