CN114076383B - Air conditioner control method, air conditioner and computer storage medium - Google Patents
Air conditioner control method, air conditioner and computer storage medium Download PDFInfo
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- CN114076383B CN114076383B CN202010828311.2A CN202010828311A CN114076383B CN 114076383 B CN114076383 B CN 114076383B CN 202010828311 A CN202010828311 A CN 202010828311A CN 114076383 B CN114076383 B CN 114076383B
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- air conditioner
- air
- heat exchanger
- indoor heat
- indoor
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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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
Abstract
The invention discloses a control method of an air conditioner, the air conditioner and a computer storage medium, wherein the air conditioner comprises a first indoor heat exchanger and a second indoor heat exchanger which are connected in parallel, the first indoor heat exchanger is connected with a first electronic expansion valve in series, and the second indoor heat exchanger is connected with a second electronic expansion valve in series; the air conditioner further comprises an indoor fan and a first air return port, the first indoor heat exchanger is positioned between the indoor fan and the first air return port so as to exchange heat with the return air of the first air return port, and the second indoor heat exchanger is staggered with the return air direction of the indoor fan; the control method of the air conditioner comprises the following steps: when the air conditioner is detected to meet the defrosting condition, the first electronic expansion valve is closed; controlling the air conditioner to enter a refrigeration mode; and controlling the second electronic expansion valve to adjust to a preset opening, wherein the preset opening is larger than zero. The invention aims to blow hot air into the room while defrosting, and avoid the user from feeling larger cold and hot difference.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a control method of an air conditioner, and a computer storage medium.
Background
In winter, the air conditioner is usually in a heating mode, and if the outdoor temperature is too low, the surface of the heat exchanger of the outdoor unit is frosted. When frosting occurs, the air conditioner is usually controlled to be in a refrigerating mode to defrost, and at the moment, the indoor unit fan is usually in a stop operation state so as to avoid blowing cold air to indoor users, but hot air is not blown out in the defrosting process, and the users feel obvious cold and hot differences.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a control method of an air conditioner, the air conditioner and a computer storage medium, and aims to defrost and blow hot air indoors at the same time, so that a user is prevented from feeling larger cold and hot differences.
In order to achieve the above object, the present invention provides a control method of an air conditioner, where the air conditioner includes a first indoor heat exchanger and a second indoor heat exchanger connected in parallel, the first indoor heat exchanger is connected in series with a first electronic expansion valve, and the second indoor heat exchanger is connected in series with a second electronic expansion valve; the air conditioner further comprises an indoor fan and a first air return opening, the first indoor heat exchanger is positioned between the indoor fan and the first air return opening so as to exchange heat with the return air of the first air return opening, and the second indoor heat exchanger is staggered with the return air direction of the indoor fan; the control method of the air conditioner comprises the following steps:
closing the first electronic expansion valve when the air conditioner is detected to meet a defrosting condition;
controlling the air conditioner to enter a refrigeration mode;
and controlling the second electronic expansion valve to adjust to a preset opening, wherein the preset opening is larger than zero.
Optionally, the air conditioner further comprises a second air return port, and the second indoor heat exchanger is located between the second air return port and the indoor fan or located at the second air return port so as to exchange heat of return air of the second air return port; the air conditioner further comprises a movable baffle plate, wherein the movable baffle plate is positioned between the second indoor heat exchanger and the indoor fan, the movable baffle plate is used for adjusting the air return quantity passing through the second indoor heat exchanger, and the air conditioner further comprises the following steps after the step that the defrosting condition is met by the air conditioner is detected:
and controlling the movable baffle to move to a first preset position so as to reduce the air return quantity passing through the second indoor heat exchanger.
Optionally, the control method of the air conditioner further includes:
when the air conditioner is detected to exit the defrosting mode, the movable baffle is controlled to move to a second preset position so as to increase the return air quantity passing through the second indoor heat exchanger.
Optionally, when the air conditioner is detected to exit the defrosting mode, the step of controlling the movable baffle to move to a second preset position to increase the air return quantity passing through the second indoor heat exchanger further includes:
acquiring the ambient temperature and the operating frequency of the air conditioner;
acquiring a first opening value and a second opening value according to the ambient temperature and the operating frequency;
and adjusting the opening of the first electronic expansion valve according to the first opening value, and adjusting the opening of the second electronic expansion valve according to the second opening value.
Optionally, the control method of the air conditioner further includes:
when the air conditioner is detected to meet the defrosting condition, the rotating speed of the indoor fan is reduced;
increasing the operating frequency of the air conditioner;
and after the preset time period for increasing the operating frequency of the air conditioner, executing the step of closing the first electronic expansion valve.
Optionally, after the step of controlling the air conditioner to enter the cooling mode, the method further includes:
closing an outdoor fan of the air conditioner;
increasing the operating frequency of the air conditioner;
and executing the step of controlling the second electronic expansion valve to adjust to a preset opening degree.
Optionally, before the step of controlling the second electronic expansion valve to adjust to a preset opening, the method further includes:
acquiring a capacity output nominal value of the air conditioner;
and obtaining the preset opening according to the output nominal value of the capacity of the air conditioner.
Optionally, the defrost condition includes at least one of:
the temperature of the coil pipe of the outdoor unit of the air conditioner is smaller than the preset temperature;
receiving a defrosting instruction;
the air conditioner is in a heating mode, and the heating operation time length of the air conditioner is longer than the preset time length.
In addition, in order to achieve the above object, the present invention also provides an air conditioner including: the control method comprises the steps of a memory, a processor and a control program of an air conditioner which is stored in the memory and can run on the processor, wherein the control program of the air conditioner is executed by the processor to realize the control method of the air conditioner.
In addition, in order to achieve the above object, the present invention also provides a computer storage medium having stored thereon a control program of an air conditioner, which when executed by a processor, implements the steps of the control method of an air conditioner as described above.
According to the control method of the air conditioner, the air conditioner and the computer storage medium, the air conditioner comprises a first indoor heat exchanger and a second indoor heat exchanger which are connected in parallel, wherein the first indoor heat exchanger is connected with a first electronic expansion valve in series, and the second indoor heat exchanger is connected with a second electronic expansion valve in series; the air conditioner further comprises an indoor fan and a first air return opening, the first indoor heat exchanger is located between the indoor fan and the first air return opening to exchange heat with air returned from the first air return opening, the second indoor heat exchanger is staggered with the air return direction of the indoor fan, when the fact that the air conditioner meets defrosting conditions is detected, the first electronic expansion valve is closed, the air conditioner is controlled to enter a refrigerating mode, the second electronic expansion valve is controlled to be adjusted to a preset opening, and the preset opening is larger than zero. According to the invention, by arranging the two parallel indoor heat exchangers, when defrosting is needed, the refrigerant flows through the second indoor heat exchanger instead of flowing through the first indoor heat exchanger during indoor refrigeration, and hot air is blown into the room by the residual heat of the refrigerant in the first indoor heat exchanger, so that a user is prevented from feeling larger cold and hot difference.
Drawings
FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flow chart of an embodiment of a control method of an air conditioner according to the present invention;
FIG. 3 is a flow chart of another embodiment of a control method of an air conditioner according to the present invention;
FIG. 4 is a flow chart illustrating a control method of an air conditioner according to another embodiment of the present invention;
FIG. 5 is a schematic view illustrating a structure of an indoor unit of an air conditioner according to the present invention;
fig. 6 is a schematic diagram of a connection relationship of an air conditioner according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a solution, by arranging two indoor heat exchangers in parallel, when defrosting is needed, a refrigerant flows through the second indoor heat exchanger instead of the first indoor heat exchanger during indoor refrigeration, and hot air is blown into the room by the residual heat of the refrigerant in the first indoor heat exchanger, so that a user is prevented from feeling larger cold and hot difference.
As shown in fig. 1, fig. 1 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is a control device of the air conditioner.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a memory 1004. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The memory 1004 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1004 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the terminal structure shown in fig. 1 is not limiting of the terminal and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, a memory 1004, which is a kind of computer storage medium, may include a user interface module and a control program of an air conditioner.
In the terminal shown in fig. 1, the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be used to call a control program of the air conditioner stored in the memory 1004 and perform the following operations:
closing the first electronic expansion valve when the air conditioner is detected to meet a defrosting condition;
controlling the air conditioner to enter a refrigeration mode;
and controlling the second electronic expansion valve to adjust to a preset opening, wherein the preset opening is larger than zero.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
and controlling the movable baffle to move to a first preset position so as to reduce the air return quantity passing through the second indoor heat exchanger.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
when the air conditioner is detected to exit the defrosting mode, the movable baffle is controlled to move to a second preset position so as to increase the return air quantity passing through the second indoor heat exchanger.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
acquiring the ambient temperature and the operating frequency of the air conditioner;
acquiring a first opening value and a second opening value according to the ambient temperature and the operating frequency;
and adjusting the opening of the first electronic expansion valve according to the first opening value, and adjusting the opening of the second electronic expansion valve according to the second opening value.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
when the air conditioner is detected to meet the defrosting condition, the rotating speed of the indoor fan is reduced;
increasing the operating frequency of the air conditioner;
and after the preset time period for increasing the operating frequency of the air conditioner, executing the step of closing the first electronic expansion valve.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
closing an outdoor fan of the air conditioner;
increasing the operating frequency of the air conditioner;
and executing the step of controlling the second electronic expansion valve to adjust to a preset opening degree.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
acquiring a capacity output nominal value of the air conditioner;
and obtaining the preset opening according to the output nominal value of the capacity of the air conditioner.
Further, the processor 1001 may call a control program of the air conditioner stored in the memory 1004, and further perform the following operations:
the temperature of the coil pipe of the outdoor unit of the air conditioner is smaller than the preset temperature;
receiving a defrosting instruction;
the air conditioner is in a heating mode, and the heating operation time length of the air conditioner is longer than the preset time length.
Referring to fig. 2, in an embodiment, the control method of the air conditioner includes the steps of:
step S10, when the air conditioner is detected to meet a defrosting condition, closing the first electronic expansion valve;
in this embodiment, fig. 5 and fig. 6 are combined, fig. 5 is a hanging machine structure diagram of an indoor unit of an air conditioner, fig. 6 is a schematic diagram of a connection relationship of the air conditioner, the indoor unit of the air conditioner includes a first indoor heat exchanger 07 and a second indoor heat exchanger 08 connected in parallel, a refrigerant branch where the first indoor heat exchanger 07 is located is connected in series with a first electronic expansion valve 05, a refrigerant branch where the second indoor heat exchanger 08 is located is connected in series with a second electronic expansion valve 06, and the first indoor heat exchanger 07 and the second indoor heat exchanger 08 can exchange heat with indoor air respectively. As shown in fig. 5, the indoor unit of the air conditioner includes an indoor fan X and a first air return port V, and the first indoor heat exchanger 07 is located between the indoor fan X and the first air return port V, so that the indoor unit can intake air from the first air return port V, and intake air is discharged from an air outlet W after heat exchange of the first indoor heat exchanger 07, so as to achieve the purpose of heat exchange of the air return port of the first air return port. The second indoor heat exchanger 08 is staggered with the return air direction of the indoor fan, that is, under the action of the indoor fan X, after the indoor air enters from the first air return opening V, the indoor air passes through the first indoor heat exchanger 07 and then flows out from the air outlet W, in the process, the indoor air cannot flow through the second indoor heat exchanger 08 to exchange heat, or the second indoor heat exchanger 08 is not in an air duct communicating the first air return opening V with the air outlet W, or the air conditioner meets the defrosting condition, the first electronic expansion valve 05 is closed, the air conditioner is controlled to enter a refrigeration mode, and the second electronic expansion valve 06 is controlled to be adjusted to a preset opening degree, so that when the outdoor heat exchanger is defrosted, the second indoor heat exchanger 08 corresponding to the second electronic expansion valve 06 does not participate in the process of exchanging heat for the return air of the indoor fan X, at the moment, the return air entering from the first air return opening V is only exchanged by the first indoor heat exchanger 07, and the return air after heat exchange is blown from the air outlet W to an indoor area.
In this embodiment, whether the air conditioner satisfies the defrosting condition is detected, if the air conditioner satisfies the defrosting condition, the defrosting process may be performed, first, the first electronic expansion valve 05 is closed, so that part of the refrigerant is retained in the first indoor heat exchanger 07, and the refrigerant in the first indoor heat exchanger 07 is prevented from participating in the refrigerant circulation of the air conditioner.
Optionally, the defrosting condition of the air conditioner includes that the coil temperature of the outdoor unit is smaller than a preset temperature, wherein when the air conditioner is in a heating mode, the coil temperature of the outdoor unit of the air conditioner can be acquired at regular time, and whether the coil temperature of the outdoor unit is smaller than the preset temperature is judged. Optionally, the defrosting condition of the air conditioner includes receiving a defrosting instruction triggered by a user, and after the user checks that the heat exchanger of the outdoor unit frosts, the user can send the defrosting instruction to the indoor unit of the air conditioner through a remote controller or other intelligent terminals matched with the air conditioner. Optionally, the defrosting condition of the air conditioner includes that the air conditioner is in a heating mode and the heating operation time of the air conditioner is longer than a preset time, wherein when the air conditioner is heated and the heating operation time is longer than the preset time, the outdoor heat exchanger can be considered to be frosted, so that the defrosting mode can be periodically entered to defrost the outdoor heat exchanger.
Step S20, controlling the air conditioner to enter a refrigeration mode;
and step S30, controlling the second electronic expansion valve to adjust to a preset opening, wherein the preset opening is larger than zero.
In this embodiment, after the first electronic expansion valve 05 is closed, the air conditioner is controlled to enter a refrigeration mode, and the second electronic expansion valve is adjusted to a preset opening, where the preset opening is greater than zero, that is, the second electronic expansion valve 06 is opened. Specifically, when the air conditioner enters the cooling mode, defrosting is started, as shown in fig. 6, the four-way valve a in fig. 6 is turned on to the four-way valve B, the two-way valve 010 and the first electronic expansion valve 05 are both in a closed state, at this time, the flow of the refrigerant during defrosting can be adjusted by adjusting the second electronic expansion valve 06, the indoor fan X can be in a low-speed running state, and the high-temperature refrigerant stored in the first indoor heat exchanger 07 before being opened in the cooling mode is relied on to blow the waste heat, so that the time of blowing the hot air into the indoor space is prolonged on the premise of ensuring that the hot air is blown into the indoor space, and indoor users are not felt obvious cold and hot difference when defrosting.
When the air conditioner is in a refrigerating mode, the refrigerant in the refrigerant pipeline of the air conditioner circulates, the first electronic expansion valve 05 is in a closed state, the second electronic expansion valve 06 is in an open state, the refrigerant in the first indoor heat exchanger 07 does not participate in the refrigerant, the refrigerant only flows through the second indoor heat exchanger 08 connected with the second electronic expansion valve 06 in series and the outdoor unit, namely, the first indoor heat exchanger 07 keeps higher waste heat, the second indoor heat exchanger 08 absorbs heat for refrigerating, the outdoor heat exchanger 03 of the outdoor unit releases heat for defrosting, thus, when the air conditioner is defrosted, the indoor fan X can still continue to operate, the return air of the first return air port V blows hot air from the air outlet W under the action of the waste heat of the first indoor heat exchanger 07, and the second indoor heat exchanger 08 and the return air direction of the indoor fan X are staggered, so that the hot air blown out from the air outlet W cannot be influenced.
Optionally, after the air conditioner is controlled to enter a refrigeration mode to defrost, the outdoor fan of the air conditioner is turned off, so that the heat released by the outdoor heat exchanger 03 is concentrated on the outdoor heat exchange surface, and the defrosting speed of the air conditioner is accelerated. Also, the operating frequency of the compressor of the air conditioner may be increased, for example, to 90 hz, which varies depending on the model. After the operation frequency of the air conditioner is increased, the step of controlling the second electronic expansion valve 06 to adjust to the preset opening degree is executed, and the defrosting speed of the air conditioner is accelerated by increasing the operation frequency to improve the refrigerant pressure and the refrigerant temperature in the outdoor heat exchanger 03.
Alternatively, before the step of controlling the second electronic expansion valve 06 to adjust to the preset opening degree, the preset opening degree is obtained, for example, the type of the air conditioner may be obtained in advance, the preset opening degree corresponding to the type of the air conditioner may be obtained, or the capacity output nominal value of the air conditioner may be obtained, and the preset opening degree corresponding to the capacity output nominal value may be obtained, for example, the preset opening degree may be 300 steps.
Optionally, when the second indoor heat exchanger 08 is staggered from the return air direction of the indoor fan X, the influence of the second indoor heat exchanger 08 on the return air temperature of the indoor fan X may be reduced by the movable baffle 014 located between the second indoor heat exchanger and the indoor fan. The second indoor heat exchanger 08 can be communicated to the second air return opening U, but the second air return opening U is not enabled to return air through the indoor fan X, so that the second indoor heat exchanger 08 can exchange heat with indoor air slowly, the phenomenon that the temperature in a space where the second indoor heat exchanger 08 is located is too low is avoided, meanwhile, the influence of refrigeration heat absorption of the second indoor heat exchanger 08 on the indoor environment temperature can be reduced, the indoor temperature cannot be reduced too much on the premise that the air outlet W of the indoor unit is hot air, and the user is guaranteed not to feel obvious cold and hot difference.
In the technical scheme disclosed in this embodiment, by setting the second indoor heat exchanger 08 connected in parallel with the first indoor heat exchanger 07, the refrigerant circulates through the second indoor heat exchanger 08 during the refrigeration and defrosting process, but not through the first indoor heat exchanger 07, the first indoor heat exchanger 07 can still keep higher waste heat, and because the second indoor heat exchanger 08 is staggered with the return air direction of the indoor fan X, the process of realizing refrigeration and defrosting can still blow hot air into the indoor space, improving the comfort of user experience during the defrosting process, and the user can not feel obvious cold and hot difference.
In another embodiment, as shown in fig. 3, after detecting that the air conditioner satisfies the defrosting condition in the embodiment shown in fig. 2, the method further includes:
and S40, controlling the movable baffle to move to a first preset position so as to reduce the air return quantity passing through the second indoor heat exchanger.
In this embodiment, as shown in fig. 5, the indoor unit of the air conditioner further includes a second air return opening U, and the second indoor heat exchanger 08 is located between the second air return opening U and the indoor fan X, or, the second indoor heat exchanger 08 may also be located at the position of the second air return opening U, and the position of the second indoor heat exchanger 08 may implement heat exchange for the return air of the second air return opening U, and the second indoor heat exchanger 08 may not affect the return air of the first air return opening V. As shown in fig. 5, the indoor unit of the air conditioner further includes a movable baffle 014, where the movable baffle 014 is located between the second indoor heat exchanger 08 and the indoor fan X, and the movable baffle 014 is used for adjusting the air return quantity passing through the second indoor heat exchanger 08, that is, adjusting the air return quantity of the second air return opening U.
In the present embodiment, after detecting that the air conditioner satisfies the defrosting condition, the movable damper 014 is controlled to move to the first preset position to reduce the amount of return air passing through the second indoor heat exchanger 08. Since the second indoor heat exchanger 08 absorbs heat and refrigerates when the air conditioner is used for refrigerating and defrosting, if the return air quantity passing through the second indoor heat exchanger 08 is reduced, the influence of cold air passing through the second indoor heat exchanger 08 on hot air of the first indoor heat exchanger 07 can be reduced, and the air outlet W can still blow hot air into the room. In an embodiment, when the movable baffle 014 moves to the first preset position, the return air passing through the second indoor heat exchanger 08 is zero, so as to reduce the influence of heat absorption and refrigeration of the second indoor heat exchanger 08 on hot air blown out from the air outlet W to the minimum, and the time for blowing hot air from the air outlet W is longer and the effect of blowing hot air from the air outlet W is better when the air conditioner is used for refrigerating and defrosting. Wherein the operating frequency of the compressor is reduced to balance the system pressure while controlling the movable stop 014 to move to the first preset position, for example, to reduce the operating frequency of the compressor to 40 hz for 30 seconds.
Optionally, when the movable baffle 014 is disposed between the second indoor heat exchanger 08 and the indoor fan X, if it is detected that the air conditioner satisfies the exit condition of the defrosting mode and the air conditioner exits the defrosting mode, the movable baffle 014 is controlled to move from the first preset position to the second preset position to increase the air return quantity passing through the second indoor heat exchanger 08, i.e. increase the air return quantity of the second air return opening U, for example, when the movable baffle 014 is at the second preset position, the air return quantity of the second air return opening U reaches the maximum. When the movable baffle 014 is located at the second preset position, air is simultaneously supplied through the first air return opening V and the second air return opening U, heat exchange is performed under the action of the first indoor heat exchanger 07, and air is blown to the indoor space through the air outlet W, so that the air outlet of the air outlet W is larger, the indoor air flows more fully, and the heat exchange effect of the air conditioner is better. Wherein the operating frequency of the compressor may also be reduced to balance the system pressure when the air conditioner exits defrost mode, for example, reducing the operating frequency of the compressor to 40 hz for 30 seconds.
Optionally, as shown in fig. 5, a movable baffle 013 may be disposed at the first air return opening V for adjusting the air return amount of the first air return opening V, so that when the air conditioner is used for cooling and defrosting, the air blowing amount of the air outlet W when the air outlet W blows hot air can be adjusted by moving the position of the movable baffle 013, for example, the air return amount of the first air return opening V can be appropriately reduced by moving the position of the movable baffle 013, so as to prolong the duration of blowing hot air by the air outlet W.
Alternatively, after the air conditioner exits the defrosting mode, the second electronic expansion valve 06 may be closed, so that the air conditioner performs heat exchange only through the first indoor heat exchanger 07, and conventional heat exchange of the air conditioner is achieved. Or after the air conditioner exits the defrosting mode, the second electronic expansion valve is still opened, the air inlet from the first air return port V exchanges heat with the first indoor heat exchanger 07, the air inlet from the second air return port U exchanges heat with the second indoor heat exchanger 08 and then exchanges heat with the first indoor heat exchanger 07, and the air outlet temperature of the air conditioner is improved through twice heat exchange of partial air flow, so that the refrigerating and heating effects of the air conditioner are better.
Alternatively, after detecting that the air conditioner exits the defrost mode and controlling the movable damper 014 to move to the second preset position, the first opening value and the second opening value are acquired, respectively. Specifically, at least one of the ambient temperature and the operating frequency of the air conditioner may be acquired, and the first opening value and the second opening value are calculated according to the at least one of the ambient temperature and the operating frequency of the air conditioner, respectively, for example, the calculation formula of the first opening value is as follows:
P1＝3T1+2T4+3f+50，85≤P1≤350
wherein P1 is a first opening value, T1 is an indoor environment temperature, T4 is an outdoor environment temperature, and f is the operating frequency of a compressor of the air conditioner.
The calculation formula of the second opening value is as follows:
P2＝T1+0.7T4+f+50，85≤P2≤350
wherein P2 is a second opening value, T1 is an indoor environment temperature, T4 is an outdoor environment temperature, and f is the operating frequency of the compressor of the air conditioner.
Since the positions of the first indoor heat exchanger 07 and the second indoor heat exchanger 08 in the air duct are different, the requirements for the heat exchange capacities of the first indoor heat exchanger 07 and the second indoor heat exchanger 08 are also different, so that different first opening values and second opening values can be calculated respectively. Alternatively, the first opening value and the second opening value may be calculated according to the same calculation formula, that is, the first opening value is equal to the second opening value.
After the first opening value and the second opening value are calculated, the opening of the first electronic expansion valve is adjusted to the first opening value, and the opening of the second electronic expansion valve is adjusted to the second opening value. By adjusting the opening degrees of the first electronic expansion valve and the second electronic expansion valve according to the ambient temperature and the compressor frequency, the heat exchange effect of the corresponding first indoor heat exchanger 07 and second indoor heat exchanger 08 is better.
In the technical scheme disclosed in this embodiment, when the air conditioner is used for refrigerating and defrosting, the movable baffle 014 is controlled to move to the first preset position, so that the influence of the second indoor heat exchanger 08 on the hot air passing through the first indoor heat exchanger 07 is reduced, the temperature of the hot air blown out indoors during refrigerating and defrosting is higher, and the duration of the hot air is longer.
In still another embodiment, as shown in fig. 4, after detecting that the air conditioner satisfies the defrosting condition on the basis of the steps shown in any one of the embodiments of fig. 2 to 3, the method further includes:
step S50, when the air conditioner is detected to meet a defrosting condition, the rotating speed of the indoor fan is reduced;
step S60, the operation frequency of the air conditioner is improved;
in this embodiment, after detecting that the air conditioner satisfies the defrosting condition, before the first electronic expansion valve 05 is closed, the rotation speed of the indoor fan X may be further reduced, so that the temperature of the refrigerant flowing through the first indoor heat exchanger 07 is increased, and the heat storage amount of the refrigerant in the first indoor heat exchanger 07 is increased. Naturally, the operation frequency of the compressor of the air conditioner can be increased, and the refrigerant pressure and the refrigerant temperature at the high pressure side can be forcedly increased, so that the temperature of the refrigerant flowing through the first indoor heat exchanger 07 is further increased, the refrigerant pressure is also increased, and the heat storage amount of the refrigerant in the first indoor heat exchanger 07 is further increased.
Step S70, after a preset period of time for increasing the operation frequency of the air conditioner, executing the step of closing the first electronic expansion valve.
In this embodiment, after the preset duration of the operation frequency of the air conditioner is increased, or after the preset duration of the rotation speed of the indoor fan is reduced, the heat storage amount of the refrigerant in the first indoor heat exchanger 07 can be considered to meet the requirement, so that the step of closing the first electronic expansion valve 05 can be performed, the two-way valve 010 and the first electronic expansion valve 05 are synchronously and completely closed within 1 minute, so that the waste heat of the refrigerant remaining in the first indoor heat exchanger 07 is higher, the temperature of the hot air blown out under the heat exchange effect of the first indoor heat exchanger 07 is higher when the air conditioner is defrosted and cooled, the time of blowing the hot air by the air outlet W is further prolonged, and the user experience is more comfortable.
In the technical scheme disclosed in this embodiment, when it is detected that the air conditioner meets the defrosting condition, the rotation speed of the indoor fan X is reduced, the operation frequency of the compressor of the air conditioner is increased, and after a preset period of time, the step of closing the first electronic expansion valve 05 is performed, so that when the air conditioner is defrosted and cooled, more residual heat remains in the first indoor heat exchanger 07, and the time for blowing hot air at the air outlet W is prolonged.
In addition, an embodiment of the present invention further provides an air conditioner, where the air conditioner includes: the control method comprises the steps of the control method of the air conditioner, wherein the steps are realized when the control program of the air conditioner is executed by the processor.
In this embodiment, fig. 5 is a hanging machine structure diagram of an indoor unit of an air conditioner, where the indoor unit of the air conditioner includes a first indoor heat exchanger 07 and a second indoor heat exchanger 08 connected in parallel with the first indoor heat exchanger 07, the indoor unit of the air conditioner further includes an indoor fan X and a first air return port V, and the first indoor heat exchanger 07 is located between the indoor fan X and the first air return port V, so that the indoor unit can intake air from the first air return port V, and intake air flows through heat exchange of the first indoor heat exchanger 07 and then flows out from an air outlet W, so as to achieve the purpose of exchanging heat with the air return port of the first air return port. The second indoor heat exchanger 08 is staggered from the return air direction of the indoor fan, that is, after the indoor air enters from the first return air inlet V, the indoor air passes through the first indoor heat exchanger 07 and then is discharged from the air outlet W, and in the process, the indoor air cannot flow through the second indoor heat exchanger 08 to exchange heat, or the second indoor heat exchanger 08 is not in an air channel communicating the first return air inlet V with the air outlet W.
Fig. 6 is a schematic diagram of a connection relationship of an air conditioner, which includes a compressor 01, a four-way valve 02, an outdoor heat exchanger 03, an outdoor fan 04, a first electronic expansion valve 05, a second electronic expansion valve 06, a first indoor heat exchanger 07, a second indoor heat exchanger 08, an indoor fan 09, and a two-way valve 010. The first indoor heat exchanger 07 and the second indoor heat exchanger 08 are connected to the outdoor heat exchanger 03 in parallel, a refrigerant branch where the first indoor heat exchanger 07 is located is connected with the first electronic expansion valve 05 in series, and a refrigerant branch where the second indoor heat exchanger 08 is located is connected with the second electronic expansion valve 06 in series.
In this embodiment, by setting the second indoor heat exchanger 08 connected in parallel with the first indoor heat exchanger 07, the refrigerant circulates through the second indoor heat exchanger 08 during the cooling and defrosting process, but not through the first indoor heat exchanger 07, the first indoor heat exchanger 07 can still keep higher waste heat, and because the second indoor heat exchanger 08 is staggered with the return air direction of the indoor fan X, the cooling and defrosting process can still blow hot air to the indoor space, the comfort of user experience during the defrosting process is improved, and the user can not feel obvious cold and hot difference.
In addition, the embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores a control program of the air conditioner, and the control program of the air conditioner realizes the steps of the control method of the air conditioner in each embodiment when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. The control method of the air conditioner is characterized in that the air conditioner comprises a first indoor heat exchanger and a second indoor heat exchanger which are connected in parallel, wherein the first indoor heat exchanger is connected with a first electronic expansion valve in series, and the second indoor heat exchanger is connected with a second electronic expansion valve in series; the air conditioner further comprises an indoor fan and a first air return opening, the first indoor heat exchanger is positioned between the indoor fan and the first air return opening so as to exchange heat with the return air of the first air return opening, and the second indoor heat exchanger is staggered with the return air direction of the indoor fan; the control method of the air conditioner comprises the following steps:
when the air conditioner is detected to meet the defrosting condition, the first electronic expansion valve is closed, and part of refrigerant is reserved in the first indoor heat exchanger;
controlling the air conditioner to enter a refrigeration mode;
controlling the second electronic expansion valve to adjust to a preset opening, wherein the preset opening is larger than zero;
the air conditioner further comprises a second air return port, and the second indoor heat exchanger is positioned between the second air return port and the indoor fan or positioned at the second air return port so as to exchange heat with return air of the second air return port; the air conditioner further comprises a movable baffle plate, wherein the movable baffle plate is positioned between the second indoor heat exchanger and the indoor fan, the movable baffle plate is used for adjusting the air return quantity passing through the second indoor heat exchanger, and the air conditioner further comprises the following steps after the step that the defrosting condition is met by the air conditioner is detected:
and controlling the movable baffle to move to a first preset position so as to reduce the air return quantity passing through the second indoor heat exchanger.
2. The control method of an air conditioner as set forth in claim 1, wherein the control method of an air conditioner further includes:
when the air conditioner is detected to exit the defrosting mode, the movable baffle is controlled to move to a second preset position so as to increase the return air quantity passing through the second indoor heat exchanger.
3. The method for controlling an air conditioner according to claim 2, wherein when the air conditioner is detected to exit the defrost mode, the step of controlling the movable baffle to move to a second preset position to increase the amount of return air passing through the second indoor heat exchanger further comprises:
acquiring the ambient temperature and the operating frequency of the air conditioner;
acquiring a first opening value and a second opening value according to the ambient temperature and the operating frequency;
and adjusting the opening of the first electronic expansion valve according to the first opening value, and adjusting the opening of the second electronic expansion valve according to the second opening value.
4. The control method of an air conditioner as set forth in claim 1, wherein the control method of an air conditioner further includes:
when the air conditioner is detected to meet the defrosting condition, the rotating speed of the indoor fan is reduced;
increasing the operating frequency of the air conditioner;
and after the preset time period for increasing the operating frequency of the air conditioner, executing the step of closing the first electronic expansion valve.
5. The method for controlling an air conditioner as set forth in claim 1, further comprising, after said step of controlling said air conditioner to enter a cooling mode:
closing an outdoor fan of the air conditioner;
increasing the operating frequency of the air conditioner;
and executing the step of controlling the second electronic expansion valve to adjust to a preset opening degree.
6. The method of controlling an air conditioner as set forth in claim 1, wherein before the step of controlling the second electronic expansion valve to be adjusted to a preset opening degree, further comprising:
acquiring a capacity output nominal value of the air conditioner;
and obtaining the preset opening according to the output nominal value of the capacity of the air conditioner.
7. The control method of an air conditioner as set forth in claim 1, wherein the defrosting condition includes at least one of:
the temperature of the coil pipe of the outdoor unit of the air conditioner is smaller than the preset temperature;
receiving a defrosting instruction;
the air conditioner is in a heating mode, and the heating operation time length of the air conditioner is longer than the preset time length.
8. An air conditioner, characterized in that the air conditioner comprises: a memory, a processor, and a control program of an air conditioner stored on the memory and operable on the processor, which when executed by the processor, realizes the steps of the control method of an air conditioner according to any one of claims 1 to 7.
9. A computer storage medium, wherein a control program of an air conditioner is stored on the computer storage medium, which when executed by a processor, implements the steps of the control method of an air conditioner according to any one of claims 1 to 7.
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