CN115289647A - Method and device for controlling air conditioner, air conditioner and storage medium - Google Patents
Method and device for controlling air conditioner, air conditioner and storage medium Download PDFInfo
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- CN115289647A CN115289647A CN202210885154.8A CN202210885154A CN115289647A CN 115289647 A CN115289647 A CN 115289647A CN 202210885154 A CN202210885154 A CN 202210885154A CN 115289647 A CN115289647 A CN 115289647A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010257 thawing Methods 0.000 claims description 28
- 238000012937 correction Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 abstract description 39
- 239000007788 liquid Substances 0.000 description 41
- 230000001276 controlling effect Effects 0.000 description 25
- 230000006870 function Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate 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
- F24F11/70—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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances and discloses a method for controlling an air conditioner, wherein the air conditioner comprises the following steps: an outdoor variable split heat exchanger; a control valve is arranged on at least one heat exchange branch of the outdoor variable flow-dividing heat exchanger; the method comprises the following steps: determining an operation mode of an air conditioner; determining a target opening degree of the control valve according to the operation mode; and controlling the control valve to be opened to the target opening degree. In the case where the outdoor heat exchanger has the variable bypass function, a target opening degree of the control valve is determined based on an operation mode of the air conditioner so that the target opening degree matches the operation mode. The target opening degree of the control valve is different, so that the amount of the refrigerant flowing into the heat exchange branch is different. Therefore, the flow of the refrigerant flowing into the outdoor heat exchanger is controlled, so that the heat exchange performance of the outdoor heat exchanger is matched with the operation mode of the air conditioner, and the operation of the air conditioner reaches a better state. The application also discloses a device for controlling the air conditioner, the air conditioner and a storage medium.
Description
Technical Field
The present application relates to the field of intelligent household appliance technologies, and for example, to a method and an apparatus for controlling an air conditioner, and a storage medium.
Background
Currently, when the air conditioner operates in different modes, such as a cooling mode and a heating mode, the flow path is the same. The performance requirements of the heat exchanger in different working modes cannot be guaranteed.
Disclosed in the related art is a heat exchanger including: a gas collecting pipe; the first end of the first heat exchange passage is connected with the first pipe orifice of the gas collecting pipe, and the second end of the first heat exchange passage is connected with the first flow dividing element; a first end of the first heat exchange passage is connected with a first pipe orifice of the gas collecting pipe, and a second end of the first heat exchange passage is connected with the first flow dividing element; a third heat exchange path having a first end connected to the second flow dividing element and a second end connected to the first flow dividing element; a fourth heat exchange path having a first end connected to the second flow dividing element and a second end connected to the third flow dividing element; a first bypass line connecting the first shunt element and the third shunt element; the second bypass pipeline is connected with the second shunt element and the gas collecting pipe; a first check valve provided in the first bypass line, and a communication direction of the first check valve being defined so as to flow from the third branching element to the first branching element; the second one-way valve is arranged on the second bypass pipeline, and the conduction direction of the second one-way valve is limited to be from the second shunt element to the gas collecting pipe; and the first control valve is arranged on a communication pipeline of the fourth heat exchange passage and the third flow dividing element.
The heat exchanger has a variable flow dividing function, so that the flow direction of a refrigerant in the heat exchanger can be changed in different operation modes, and the flow direction of the refrigerant is matched with the operation modes. But only the flow direction of the cooling medium can be controlled to be matched with the operation mode, and the operation of the air conditioner cannot reach a better state.
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 method and a device for controlling an air conditioner, the air conditioner and a storage medium, so that the operation of the air conditioner reaches a better state.
In some embodiments, the air conditioner includes: an outdoor variable split heat exchanger; at least one heat exchange branch of the outdoor variable flow-dividing heat exchanger is provided with a control valve; the method comprises the following steps: determining an operation mode of the air conditioner; determining a target opening degree of the control valve according to the operation mode; and controlling the control valve to be opened to a target opening degree.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to, upon execution of the program instructions, perform the aforementioned method for controlling an air conditioner.
In some embodiments, the air conditioner includes: the outdoor variable flow-dividing heat exchanger is provided with a control valve on at least one heat exchange branch; further comprising: such as the aforementioned apparatus for controlling an air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the aforementioned method for controlling an air conditioner.
The method and the device for controlling the air conditioner, the air conditioner and the storage medium provided by the embodiment of the disclosure can achieve the following technical effects:
in the case where the outdoor heat exchanger has the variable bypass function, a target opening degree of the control valve is determined based on an operation mode of the air conditioner so that the target opening degree matches the operation mode. The target opening degree of the control valve is different, the refrigerant amount flowing into the heat exchange branch is different. Therefore, the flow of the refrigerant flowing into the outdoor heat exchanger is controlled, so that the heat exchange performance of the outdoor heat exchanger is matched with the operation mode of the air conditioner, and the operation of the air conditioner reaches a better state.
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 diagram of an air conditioner refrigerant circulation loop according to an embodiment of the disclosure;
FIG. 2 is a schematic illustration of a compressor torque versus discharge pressure/return pressure curve provided by an embodiment of the present disclosure;
FIG. 3 is a schematic illustration of another compressor torque versus discharge pressure/return pressure curve provided by an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of another method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram of another method for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of an apparatus for controlling an air conditioner according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of another apparatus for controlling an air conditioner according to an embodiment of the present disclosure.
Reference numerals:
10. a compressor; 20. an indoor heat exchanger; 30. an outdoor variable split flow heat exchanger; 31. a first liquid separator; 32. a second liquid separator; 33. a third liquid distributor; 34. a fourth liquid distributor; 35. a first heat exchange branch; 36. a second heat exchange branch; 37. a third heat exchange branch; 38. a first bypass line; 381. a first check valve; 39. a second bypass line; 391. a second one-way valve; 40. a four-way valve; 50. a first main tube; 51. a first electronic expansion valve; 60. a second main pipe; 70. and (4) controlling the valve.
Detailed Description
So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. 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.
The terms "first," "second," and the like in the description and claims of the embodiments of the disclosure and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate for the embodiments of the disclosure described herein. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponding to B refers to an association or binding relationship between a and B.
Referring to fig. 1, an embodiment of the present disclosure provides an air conditioner. This air conditioner includes: a compressor 10, an indoor heat exchanger 20, an outdoor variable-split heat exchanger 30, and a four-way valve 40. The compressor 10, the indoor heat exchanger 20, the outdoor variable-split heat exchanger 30, and the four-way valve 40 are connected to form a refrigerant circulation circuit.
The outdoor variable split flow heat exchanger 30 (hereinafter simply referred to as "outdoor heat exchanger") includes: a first liquid separator 31, a second liquid separator 32, a third liquid separator 33, a fourth liquid separator 34 and a heat exchange pipeline.
The heat exchange pipeline includes: a first heat exchange branch 35, a second heat exchange branch 36 and a third heat exchange branch 37.
The liquid collecting end of the first liquid separator 31 communicates with the indoor heat exchanger 20 through the first main pipe 50. The first main pipe 50 is provided with a first electronic expansion valve 51.
The liquid separating end of the first liquid separator 31 is communicated with the first end of the first heat exchange branch 35. The liquid separating end of the first liquid separator 31 is also communicated with the liquid collecting end of the second liquid separator 32 through a first bypass line 38. The first bypass line 38 is provided with a first check valve 381 for limiting the refrigerant in the first bypass line 38 to flow only from the first liquid separator 31 to the second liquid separator 32.
The liquid separating end of the second liquid separator 32 is in communication with a first end of a second heat exchange branch 36. The liquid separating end of the second liquid separator 32 is also communicated with the first end of the third heat exchange branch 37.
And the second end of the first heat exchange branch 35 is communicated with the liquid separating end of the third liquid distributor 33. And the second end of the second heat exchange branch 36 is communicated with the liquid separating end of the third liquid distributor 33. The liquid collecting end of the third liquid distributor 33 is communicated with the liquid separating end of the fourth liquid distributor 34 through a second bypass pipeline 39. The second bypass line 39 is provided with a second check valve 391 for limiting the refrigerant in the second bypass line 39 to flow only from the third liquid separator 33 to the fourth liquid separator 34.
A second end of the third heat exchange branch 37 is communicated with the liquid separating end of the fourth liquid separator 34. The liquid collecting end of the fourth liquid distributor 34 is communicated with the four-way valve 40 through a second main pipe 60.
When the air conditioner operates in the heating mode, the refrigerant flows in from the first main pipe 50. Under the action of the liquid separation of the first liquid separator 31 and the second liquid separator 32, the liquid flows into the first heat exchange branch 35, the second heat exchange branch 36 and the third heat exchange branch 37, respectively. Then, they join in second main pipe 60 and flow into four-way valve 40. Thus, all the heat exchange branches are connected in parallel.
When the air conditioner operates in the cooling mode, the refrigerant flows in from the second main pipe 60. Under the blocking action of the first check valve 381 and the second check valve 391, the water flows into the third heat exchange branch 37, the second heat exchange branch 36 and the first heat exchange branch 35 in sequence. And finally flows into the indoor heat exchanger 20 through the first main pipe 50. Thus, all the heat exchange branches are connected in series.
It should be noted that the heat exchange pipeline may include more heat exchange branches and liquid distributors, and the specific connection manner may be as described above, so as to implement parallel connection of more heat exchange branches in the heating mode and serial connection of more heat exchange branches in the cooling mode.
The existing defrosting modes of the outdoor unit comprise stop defrosting and non-stop defrosting.
The shutdown defrosting refers to: firstly, the compressor and the fan motor are stopped. The flow direction of the refrigerant is then switched by the four-way valve. Namely, the air conditioner is enabled to work in a refrigerating state (but the motors of the outdoor fan and the indoor fan do not rotate), high-temperature and high-pressure refrigerant discharged by the compressor enters the outdoor heat exchanger, and frost on the surface of the outdoor heat exchanger is melted in a gasification heat dissipation mode, so that the aim of defrosting is fulfilled. Most of the cooling and heating type air conditioners adopt the defrosting mode.
The defrosting without stopping the machine is that: in the heating state of the air conditioner, a part of high-temperature and high-pressure refrigerant discharged from the compressor flows into the outdoor heat exchanger through the bypass electromagnetic valve to complete defrosting. Only a small part of cooling and heating type air conditioners adopt the defrosting mode.
When defrosting of the outdoor variable bypass heat exchanger 30 provided in the embodiment of the present disclosure is performed without stopping, the first electronic expansion valve 51 does not perform a throttling function. This is because: the front and rear connection pipes of the conventional electronic expansion valve are connected by capillary tubes, but the structure of the first electronic expansion valve 51 in this embodiment is changed (the structure of the first electronic expansion valve 51 in this embodiment is not the focus of this embodiment, and is not described here again), and the capillary tubes need to be removed. When the opening degree of the first electronic expansion valve 51 is adjusted to the maximum, the refrigerant flow rate is the maximum, and therefore the first electronic expansion valve 51 does not perform the throttling function. The system does not have an evaporator during non-stop defrost. When the defrosting is not stopped during operation, the exhaust temperature is reduced, and the return temperature is increased. As shown in fig. 2, the abscissa of the coordinate system represents the torque of the compressor 10, and the ordinate represents the discharge pressure/return pressure. If the moment of the compressor 10 before defrosting without stopping is the moment corresponding to the point A, the moment after opening the bypass electromagnetic valve may be changed into the moment corresponding to the point B. The exhaust temperature then remains substantially unchanged or even rises slightly back. The return air temperature rises, and the moment will become the moment corresponding to the point C. And the torque corresponding to the point A is restored after the bypass electromagnetic valve is closed. After point B, the moments are all larger than the moments corresponding to point A. The power of the compressor increases. If the duration is longer, the discharge pressure and the return pressure become higher, which may result in a loss of reliability of the compressor 10.
After the control valve 70 is additionally arranged on the heat exchange branch, the heat exchange branch provided with the control valve 70 plays a role of an evaporator. Therefore, the outlet temperature of the outdoor heat exchanger, that is, the return air temperature can be reduced. As shown in fig. 3, the torque of the compressor 10 is changed to a torque corresponding to a → D → E, which is lower than the original torque corresponding to a → B → C. Compressor power is reduced and reliability is improved.
Optionally, a control valve 70 is provided in at least one of the heat exchange branches.
If the air conditioner operates in the heating mode, the refrigerant inflow side of the outdoor heat exchanger is the right side of the outdoor heat exchanger in fig. 1. If the air conditioner operates in the cooling mode, the refrigerant inflow side of the outdoor heat exchanger is the left side of the outdoor heat exchanger in fig. 1.
If only one heat exchange branch is provided with the control valve 70, the heat exchange branch is the uppermost branch. Taking the outdoor heat exchanger provided in fig. 1 as an example, the control valve 70 is disposed on the third heat exchange branch 37. This is because if the control valve 70 is provided in the middle or lower heat exchange branch, the melted upper frost layer may flow to the non-defrosted portion. The temperature of the part without defrosting is low, so that the defrosting water can be frozen, and the subsequent heating and defrosting are influenced. When the control valve 70 is disposed in the uppermost heat exchange branch, the control valve 70 is controlled to open after the defrosting process is completed. After the frost is melted, the defrosting water can rapidly flow down and leave the outdoor heat exchanger.
Alternatively, a control valve 70 is provided on each heat exchange branch on the refrigerant inflow side of the outdoor heat exchanger in the hot mode of operation.
Optionally, the control valve 70 is a second electronic expansion valve.
As shown in fig. 4, an embodiment of the present disclosure provides a method for controlling an air conditioner, including:
s401, the air conditioner determines its operation mode.
And S402, determining the target opening of the control valve by the air conditioner according to the operation mode.
And S403, opening the air conditioner control valve to a target opening degree.
When the air conditioner is operated, an operation mode of the air conditioner is determined, for example, a defrosting mode, a cooling mode or a heating mode without stopping the operation of the air conditioner is determined. Specifically, when the air conditioner processor receives the instruction, the instruction is analyzed, so that the related control content is obtained. The processor determines the current operating mode by parsing the content obtained in the past. And different operation modes correspond to different target opening degrees of the control valve. And after the target opening degree is determined, the control valve is controlled to be opened to the target opening degree.
In the embodiment of the present disclosure, in the case where the outdoor heat exchanger has the variable bypass function, the target opening degree of the control valve is determined based on the operation mode of the air conditioner so that the target opening degree matches the operation mode. The target opening degree of the control valve is different, the refrigerant amount flowing into the heat exchange branch is different. Therefore, the flow of the refrigerant flowing into the outdoor heat exchanger is controlled, so that the heat exchange performance of the outdoor heat exchanger is matched with the operation mode of the air conditioner, and the operation of the air conditioner reaches a better state.
Referring to fig. 5, another method for controlling an air conditioner according to an embodiment of the present disclosure includes:
s401, the air conditioner determines the operation mode of the air conditioner.
And S412, after the air conditioner executes the step S401, under the condition that the operation mode is the non-stop defrosting mode or the heating mode, determining the operation frequency of the compressor.
And S422, after the air conditioner executes the step S412, determining the target opening degree of the control valve according to the operation frequency.
And S432, after the air conditioner executes the step S401, when the operation mode is the cooling mode or the dehumidification mode, determining the maximum opening of the control valve as the target opening.
And S403, opening the air conditioner control valve to a target opening degree.
And if the operation mode of the air conditioner is determined to be the non-stop defrosting mode or the heating mode, further determining the operation frequency of the compressor. Then, a target opening degree of the control valve is determined according to the operating frequency of the compressor. This is because: when the air conditioner operates in the heating mode, the outdoor ambient temperature is generally low. At the moment, the outdoor heat exchanger is easy to frost during operation and refrigeration. Accordingly, the target opening degree of the control valve is determined based on the operating frequency of the compressor so that the refrigerant flowing into the outdoor heat exchanger matches the operating frequency of the compressor. The excessive refrigerant is prevented from flowing into the outdoor heat exchanger, the frosting risk of the outdoor heat exchanger is increased, and therefore the normal operation of the air conditioner is guaranteed.
When the air conditioner is operated in the defrosting mode without stopping, the outdoor unit operates to heat, and meanwhile, the indoor unit also operates to heat all the time. As described above, after the bypass solenoid valve is opened, the discharge temperature and the return pressure of the compressor become high, thereby affecting the reliability of the compressor. Therefore, the opening degree of the control valve is matched with the operation frequency of the compressor, namely the refrigerant quantity for defrosting is controlled to be matched with the operation frequency of the compressor, so that the exhaust temperature and the return temperature are reduced, and the reliability of the compressor is ensured.
If it is determined that the operation mode of the air conditioner is the cooling mode or the dehumidifying mode, it indicates that the outdoor ambient temperature is relatively high. There is no risk of frost formation in the outdoor heat exchanger. Therefore, the maximum opening degree of the control valve is determined as a target opening degree so that as much refrigerant as possible flows into the outdoor heat exchanger. In this way, the indoor refrigeration/dehumidification effect is guaranteed to be optimal.
Optionally, in step S422, when the operation mode of the air conditioner is the heating mode, determining a target opening degree of the control valve according to the operation frequency includes:
S＝a*F+b (1)
wherein S is the target opening of the control valve, F is the operating frequency of the compressor, and a and b are constants.
When the air conditioner operates in a heating mode, the first electronic expansion valve performs primary throttling on the refrigerant. Therefore, the control valve only has the function of fine adjustment on the refrigerant flow. The refrigerant quantity of the branch where the regulating control valve is located is increased, so that the refrigerant is uniformly distributed. The higher the operating frequency of the compressor is, the higher the heating capacity of the air conditioner is, and the faster the indoor temperature reaches the set temperature. Therefore, the opening degree of the control valve needs to be controlled to increase accordingly. Specifically, the target opening degree of the control valve is calculated according to the above formula (1). Alternatively, a = 1.2-1.8, b = 200-300.
Optionally, in step S422, when the operation mode of the air conditioner is the non-stop defrosting mode, determining the target opening of the control valve according to the operation frequency includes:
the air conditioner determines an initial target opening degree of the control valve according to the operation frequency.
The air conditioner determines the maximum opening degree of the control valve as the final target opening degree under the condition that the control valve maintains the initial target opening degree for a first preset time.
In the refrigerant circulation circuit, when the first electronic expansion valve is fully opened, the control valve is the only throttling part.
If the operation mode of the air conditioner is the non-stop defrosting mode, the initial target opening degree of the control valve is determined according to the operation frequency of the air conditioner. The larger the operating frequency, the larger the initial target opening degree. Specifically, the initial target opening degree is calculated according to formula (2).
S＝F+c (2)
Where S is an initial target opening degree of the control valve, F is an operation frequency of the compressor, and c is a constant. Optionally, c =100 to 150.
Thus, the target opening degree of the control valve is different, and the refrigerant amount flowing into the heat exchange branch is different. The amount of refrigerant affects the heat exchange performance of the outdoor heat exchanger, and thus affects the discharge temperature and the return temperature of the compressor. Thus, the opening degree of the control valve is adaptively increased/decreased as the operating frequency of the compressor increases/decreases. After the control valve is opened to the initial target opening degree, the uppermost heat exchange branch still plays the role of an evaporator to reduce the outlet temperature of the outdoor heat exchanger, namely, the return air temperature. This results in a reduction in the overall power of the compressor, while at the same time improving the reliability of the compressor.
And after the first preset time, determining the maximum opening of the control valve as the final target opening of the control valve. At this time, the control valve is fully opened in order to defrost the uppermost heat exchange branch. Optionally, the first preset time period is 1 to 2 minutes.
Alternatively, after the control valve is opened to the initial target opening degree, the outlet temperature Ta of the outdoor heat exchanger may also be detected. And if the Ta is more than or equal to T and lasts for the first preset time, determining the final target opening of the control valve as the maximum opening of the control valve. Wherein T is a temperature threshold and can be 3-5 ℃. Therefore, on the basis that the opening degree of the control valve is the initial target opening degree and the first preset time is maintained, whether the control valve needs to be completely opened or not is further judged by combining the outlet temperature of the outdoor heat exchanger. When Ta is more than or equal to T, the temperature of the refrigerant in the outdoor heat exchanger is higher. At this time, the control valve is fully opened, so that more refrigerant flows into the outdoor heat exchanger. On one hand, the outlet temperature of the outdoor heat exchanger can be reduced, so that the reliability of the compressor is ensured. On the other hand, the refrigerant with higher temperature can be used for defrosting the outdoor heat exchanger.
Referring to fig. 6, another method for controlling an air conditioner according to an embodiment of the present disclosure includes:
s601, the air conditioner determines the operation mode of the air conditioner.
And S602, determining the operating frequency of the compressor when the operating mode of the air conditioner is the heating mode.
And S603, determining the target opening of the control valve by the air conditioner according to the running frequency.
And S604, opening the air conditioner control valve to a target opening degree.
S605, the air conditioner obtains the outlet temperature difference between the uppermost heat exchange branch and the adjacent lower heat exchange branch.
And S606, the air conditioner corrects the target opening according to the outlet temperature difference.
And S607, opening the air conditioner control valve to the corrected target opening.
When the air conditioner operates in a heating mode and only the uppermost heat exchange branch positioned on the refrigerant input side is provided with the control valve, the outlet temperature difference delta T between the heat exchange branch and the adjacent lower heat exchange branch is obtained. And correcting the target opening according to the outlet temperature difference. The processor of the air conditioner is pre-stored with the correlation between the outlet temperature difference and the opening correction value. The correlation includes a correspondence between one or more outlet temperature differences and the opening correction value. The larger the outlet temperature difference is, the larger the correction value for the target opening degree is.
Optionally, when the outlet temperature difference is in the first temperature range, the opening correction value is the first correction value. And when the outlet temperature difference is in a second temperature interval, the opening correction value is a second correction value. And when the temperature difference is in a third temperature interval, the opening correction value is a third correction value. And when the temperature difference is in a fourth temperature interval, the opening correction value is a fourth correction value. And when the temperature difference is in a fifth temperature interval, the opening correction value is a fifth correction value. Wherein, the lower limit value of the former temperature interval is larger than the upper limit value of the latter temperature interval from the first temperature interval to the fifth temperature interval. The first to fifth correction values decrease in order. Alternatively, the first correction value and the second correction value are positive values. The fourth correction value and the fifth correction value are negative values. Specifically, the correlation between the outlet temperature difference and the opening correction value can be seen in table 1.
TABLE 1 correlation between outlet temperature difference and corrected opening value
| Exit temperature difference Δ T (. Degree. C.) | Opening correction value (step) |
| ΔT>3℃ | 6 |
| 1℃<ΔT≤3℃ | 2 |
| -1℃<ΔT≤1℃ | 0 |
| -3℃<ΔT≤-1℃ | -2 |
| ΔT≤-3℃ | -6 |
For example, if the outlet temperature difference is 2 ℃, the opening correction value is 2, and the corrected target opening of the control valve is increased by 2 steps. And if the outlet temperature difference is 0.5 ℃, the opening correction value is 0, and the target opening of the control valve is kept unchanged. If the outlet temperature is-2 ℃, the opening correction value is-2, and the corrected target opening of the control valve is reduced by 2 steps.
It should be noted that the corresponding relationship in table 1 may be adaptively adjusted according to actual needs.
Optionally, the current outlet temperature difference is obtained at intervals of a second preset time. And correcting the target opening of the control valve again according to the current outlet temperature difference. For example, if the outlet temperature difference is 2 ℃, the opening correction value is 2, and the opening of the control valve is increased by 2 steps. And after the second preset time interval, acquiring the outlet temperature difference again. And if the outlet temperature difference is 2 ℃, controlling the opening of the control valve to increase by 2 steps. Optionally, the second preset time period is 15 to 30 seconds.
Optionally, if control valves are arranged on the plurality of heat exchange branches, when the air conditioner operates in a heating mode, the control valves are arranged on the refrigerant inflow side of the outdoor heat exchanger, the uppermost heat exchange branch and the middle heat exchange branch; or the uppermost heat exchange branch and the lowermost heat exchange branch are provided with control valves; or the uppermost heat exchange branch, the middle heat exchange branch and the lowermost heat exchange branch are provided with control valves.
When the control valves are controlled to be fully opened, the control valves are sequentially controlled to be fully opened at fixed time intervals in the order from bottom to top. That is, the lower control valve is preferably fully opened, and the upper control valve is fully opened later. This is because, if the upper control valve is opened first, the upper heat exchange branch is defrosted first. The defrosted water generated after defrosting flows to the part which is not defrosted, and the frost can be generated. Therefore, the freezing condition can be avoided in the mode, and the subsequent heating and defrosting effects are ensured.
As shown in fig. 7, an embodiment of the present disclosure provides another apparatus for controlling an air conditioner, including: a first determination module 71, a second determination module 72, and a control module 73. The first determination module 71 is configured to determine an operation mode of the air conditioner. The second determination module 72 is configured to determine a target opening of the control valve based on the operating mode. The control module 73 is configured to control the control valve to open to a target opening.
By adopting the device for controlling the air conditioner, the target opening degree of the control valve can be determined based on the operation mode of the air conditioner under the condition that the outdoor heat exchanger has the variable flow dividing function, so that the target opening degree is matched with the operation mode. The target opening degree of the control valve is different, the refrigerant amount flowing into the heat exchange branch is different. Therefore, the flow of the refrigerant flowing into the outdoor heat exchanger is controlled, so that the heat exchange performance of the outdoor heat exchanger is matched with the operation mode of the air conditioner, and the operation of the air conditioner reaches a better state.
As shown in fig. 8, an embodiment of the present disclosure provides an apparatus for controlling an air conditioner, including a processor (processor) 80 and a memory (memory) 81. Optionally, the apparatus may also include a Communication Interface 82 and a bus 83. The processor 80, the communication interface 82 and the memory 81 can communicate with each other through the bus 83. Communication interface 82 may be used for information transfer. The processor 80 may call logic instructions in the memory 81 to perform the method for controlling the air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 81 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 81 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 80 executes functional applications and data processing, i.e., implements the method for controlling the air conditioner in the above-described embodiment, by executing program instructions/modules stored in the memory 81.
The memory 81 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 81 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for controlling the air conditioner.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for controlling an air conditioner.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable 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. Furthermore, the words used in the specification are words of description for example only and are not limiting upon 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 a" \8230; "does not exclude the presence of additional like elements in a process, method or apparatus comprising 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 disclosure, 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 position, or may be distributed on multiple 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 (10)
1. A method for controlling an air conditioner, the air conditioner comprising: an outdoor variable split heat exchanger; a control valve is arranged on at least one heat exchange branch of the outdoor variable flow-dividing heat exchanger; characterized in that the method comprises:
determining an operation mode of the air conditioner;
determining a target opening degree of the control valve according to an operation mode;
and controlling the control valve to be opened to a target opening degree.
2. The method of claim 1, wherein the operation mode is a non-stop defrost mode or a heating mode; the determining the target opening degree of the control valve according to the operation mode includes:
determining an operating frequency of the compressor;
and determining the target opening degree of the control valve according to the operation frequency.
3. The method according to claim 2, wherein the determining the target opening degree of the control valve according to the operation frequency in the case that the operation mode is the non-stop defrosting mode includes:
determining an initial target opening degree of the control valve according to the operation frequency;
and under the condition that the control valve maintains the initial target opening for a preset time, determining the maximum opening of the control valve as the final target opening.
4. The method of claim 3, wherein said determining an initial target opening of the control valve based on the operating frequency comprises:
the larger the operating frequency, the larger the initial target opening degree of the control valve.
5. The method of claim 1, wherein the heat exchange branch positioned below and adjacent to the uppermost heat exchange branch is an adjacent lower heat exchange branch; after the controlling the control valve to be opened to the target opening degree, the method includes:
acquiring the outlet temperature difference of the uppermost heat exchange branch and the adjacent lower heat exchange branch;
correcting the target opening according to the outlet temperature difference;
and controlling the control valve to be opened to the corrected target opening.
6. The method of claim 5, wherein the correcting the target opening based on the outlet temperature difference comprises:
the larger the outlet temperature difference is, the larger the correction value for the target opening degree is.
7. The method according to any one of claims 1 to 6, wherein the operation mode is a cooling mode or a dehumidifying mode; the determining the target opening degree of the control valve according to the operation mode includes:
and determining the maximum opening degree of the control valve as a target opening degree.
8. An apparatus for controlling an air conditioner, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to perform the method for controlling an air conditioner according to any one of claims 1 to 7 when executing the program instructions.
9. An air conditioner, comprising:
the outdoor variable flow-dividing heat exchanger is characterized in that at least one heat exchange branch of the outdoor variable flow-dividing heat exchanger is provided with a control valve;
it is characterized by also comprising:
the apparatus for controlling an air conditioner as claimed in claim 8.
10. A storage medium storing program instructions, characterized in that the program instructions, when executed, perform a method for controlling an air conditioner according to any one of claims 1 to 7.
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| CN202210885154.8A CN115289647A (en) | 2022-07-26 | 2022-07-26 | Method and device for controlling air conditioner, air conditioner and storage medium |
| PCT/CN2022/138604 WO2024021439A1 (en) | 2022-07-26 | 2022-12-13 | Method and apparatus for controlling air conditioner, air conditioner, and storage medium |
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| CN202210885154.8A CN115289647A (en) | 2022-07-26 | 2022-07-26 | Method and device for controlling air conditioner, air conditioner and storage medium |
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| WO2024021439A1 (en) * | 2022-07-26 | 2024-02-01 | 郑州海尔空调器有限公司 | Method and apparatus for controlling air conditioner, air conditioner, and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654193A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioner and air conditioner |
| CN113834201A (en) * | 2021-09-06 | 2021-12-24 | 美的集团武汉暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN114383217A (en) * | 2021-12-14 | 2022-04-22 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
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| CN115289647A (en) * | 2022-07-26 | 2022-11-04 | 郑州海尔空调器有限公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654193A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioner and air conditioner |
| CN113834201A (en) * | 2021-09-06 | 2021-12-24 | 美的集团武汉暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN114383217A (en) * | 2021-12-14 | 2022-04-22 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024021439A1 (en) * | 2022-07-26 | 2024-02-01 | 郑州海尔空调器有限公司 | Method and apparatus for controlling air conditioner, air conditioner, and storage medium |
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Inventor after: Zhang Xinyi Inventor after: Wang Fei Inventor after: Xu Wenming Inventor after: Li Xiwu Inventor after: Zhang Long Inventor after: Wu Changying Inventor after: Li Yang Inventor after: Lin Chao Inventor before: Zhang Xinyi Inventor before: Wang Fei Inventor before: Xu Wenming Inventor before: Li Yang Inventor before: Lin Chao |
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Effective date of registration: 20231107 Address after: 230000 Haier Industrial Park, No.200, Fanhua Avenue, Hefei Economic and Technological Development Zone, Hefei City, Anhui Province Applicant after: HEFEI HAIER AIR CONDITIONER Co.,Ltd. Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 450048 No.188, 22nd Street, Zhengzhou Economic and Technological Development Zone, Henan Province Applicant before: ZHENGZHOU HAIER AIR CONDITIONER Co.,Ltd. Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Applicant before: Haier Zhijia Co.,Ltd. |