CN112577164A - Control method and device of air conditioner, air conditioner and electronic equipment - Google Patents

Control method and device of air conditioner, air conditioner and electronic equipment Download PDF

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Publication number
CN112577164A
CN112577164A CN201910922968.2A CN201910922968A CN112577164A CN 112577164 A CN112577164 A CN 112577164A CN 201910922968 A CN201910922968 A CN 201910922968A CN 112577164 A CN112577164 A CN 112577164A
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China
Prior art keywords
temperature
outdoor
air conditioner
branch
heat exchanger
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CN201910922968.2A
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Chinese (zh)
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CN112577164B (en
Inventor
陈大江
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application discloses a control method and device of an air conditioner and the air conditioner, wherein the method comprises the following steps: recognizing that the air conditioner is in a low-temperature refrigeration mode; detecting the temperature of the outdoor coil pipe, and identifying the variation trend of the temperature of the outdoor coil pipe; and adjusting the heat exchange area in the outdoor heat exchanger according to the variation trend of the temperature of the outdoor coil pipe. Can be in the low temperature refrigeration mode in this application after discerning the air conditioner, based on outdoor coil pipe temperature, confirm its trend of change, and then to the trend of change of outdoor coil pipe temperature, confirm the adjustment mode of the heat transfer area in the outdoor heat exchanger, the heat transfer area of control outdoor heat exchanger is adjusted along with the trend of change of outdoor coil pipe temperature dynamically, no longer rely on opening of outdoor fan to open and stop the thermal flow direction of control, the phenomenon of frosting appears on outdoor coil pipe surface under the low temperature refrigeration mode has been avoided, the technical problem that the air conditioner must frequently open and stop outdoor fan under the low temperature refrigeration mode has been overcome, the refrigerating capacity of air conditioner has been guaranteed.

Description

Control method and device of air conditioner, air conditioner and electronic equipment
Technical Field
The present disclosure relates to the field of air conditioners, and in particular, to a method and an apparatus for controlling an air conditioner, and an electronic device.
Background
The inverter air conditioner on the current market often has a low-temperature refrigeration function. The application scene of low-temperature refrigeration puts special requirements on the control of the air conditioner.
In the related art, a low-temperature refrigeration function of an air conditioner is usually realized by frequently starting and stopping an outdoor fan.
However, the applicant has found that the above-mentioned techniques have at least the following technical problems:
according to the control method of the air conditioner in the related art, in practical application, the low-temperature refrigeration function is realized by frequently starting and stopping the outdoor fan, and the service life of the outdoor fan is seriously influenced.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present application is to provide a control method of an air conditioner, which is used for solving the problem that an outdoor fan is frequently started and stopped when the air conditioner operates in a low-temperature cooling mode.
In order to achieve the above object, an embodiment of a first aspect of the present application provides a control method of an air conditioner, including the following steps: recognizing that the air conditioner is in a low-temperature refrigeration mode; detecting the temperature of an outdoor coil and identifying the variation trend of the temperature of the outdoor coil; and adjusting the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil pipe.
In addition, the control method of the air conditioner according to the above-described embodiment of the present application may further have the following additional technical features:
according to one embodiment of the application, a main circuit and at least one first branch circuit are communicated between the outdoor heat exchanger and the four-way valve; the adjusting of the heat exchange area in the outdoor heat exchanger comprises: and adjusting the heat exchange area in the outdoor heat exchanger by changing the opening number of the first branches connected in the outdoor heat exchanger.
According to an embodiment of the present application, adjusting a heat exchange area in an outdoor heat exchanger according to a trend of the outdoor coil temperature includes: and recognizing that the temperature of the outdoor coil pipe is gradually reduced, and reducing the heat exchange area of the outdoor heat exchanger by reducing the opening number of the first branch.
According to an embodiment of the present application, adjusting a heat exchange area in an outdoor heat exchanger according to a trend of the outdoor coil temperature includes: recognizing that the temperature of the outdoor coil pipe gradually rises, and increasing the opening number of the first branch to increase the heat exchange area of the outdoor heat exchanger.
According to one embodiment of the present application, the air conditioner further comprises a second branch, one end of the second branch is connected to a pipeline between a throttling element and the outdoor heat exchanger, and the other end of the second branch is connected to a pipeline between the four-way valve and the indoor heat exchanger; the method further comprises the following steps: recognizing that the temperature of the outdoor coil is smaller than a first preset temperature threshold value, and controlling a second branch connected with the indoor heat exchanger to be in an opening state; and recognizing that the temperature of the outdoor coil is greater than or equal to the preset temperature threshold value, and controlling the second branch to be in a closed state.
According to an embodiment of the present application, further comprising: and determining the opening state of a second branch connected with the indoor heat exchanger according to the opening number and the adjustment direction of the heat exchange area.
According to an embodiment of the present application, adjusting the opening state of the second branch connected to the indoor heat exchanger according to the opening number and the adjustment direction of the heat exchange area includes: recognizing that the adjustment direction is to reduce the heat exchange area, and if the opening number indicates that at least one first branch is in an opening state, controlling the second branch to be in a closing state; or recognizing that the adjusting direction is to reduce the heat exchange area, and the opening number indicates that all the first branches are in a closed state, controlling the second branches to be in an open state; or, recognizing that the adjustment direction is to increase the heat exchange area, and if the opening number indicates that at least one first branch is in a closed state, controlling the second branch to be in an open state; or recognizing that the adjusting direction is to increase the heat exchange area, and the opening number indicates that all the first branches are in an opening state, and controlling the second branches to be in a closing state.
According to an embodiment of the present application, determining the number of openings of the first branch includes: identifying the adjusting direction of the heat exchange area, and acquiring a plurality of temperature intervals matched with the adjusting direction; and identifying a target temperature interval in which the temperature of the outdoor coil pipe is positioned, and determining the opening number of the first branch according to the target temperature interval.
According to one embodiment of the present application, identifying that an air conditioner is in a low temperature cooling mode includes: acquiring an outdoor environment temperature, and identifying that the outdoor environment temperature is less than or equal to a second preset temperature threshold; recognizing that the air conditioner is operated in a cooling mode and a compressor is in an operating state; determining that the air conditioner is in the low-temperature cooling mode.
According to an embodiment of the present application, further comprising: and continuously detecting the outdoor environment temperature, and if the outdoor environment temperature is greater than the second preset temperature threshold value and the outdoor coil temperature is greater than a third temperature threshold value, controlling the air conditioner to exit the low-temperature refrigeration mode.
In order to achieve the above object, an embodiment of a second aspect of the present application provides a control device of an air conditioner, including: the mode identification module is used for identifying that the air conditioner is in a low-temperature refrigeration mode; the trend identification module is used for detecting the temperature of the outdoor coil and identifying the change trend of the temperature of the outdoor coil; and the adjusting module is used for adjusting the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil.
In addition, the control device of the air conditioner according to the above-described embodiment of the present application may further have the following additional technical features:
according to an embodiment of the application, the adjusting module is further configured to: and adjusting the heat exchange area in the outdoor heat exchanger by changing the opening number of the first branches connected in the outdoor heat exchanger.
According to an embodiment of the application, the adjusting module is further configured to: and recognizing that the temperature of the outdoor coil pipe is gradually reduced, and reducing the heat exchange area of the outdoor heat exchanger by reducing the opening number of the first branch.
According to an embodiment of the application, the adjusting module is further configured to: recognizing that the temperature of the outdoor coil pipe gradually rises, and increasing the opening number of the first branch to increase the heat exchange area of the outdoor heat exchanger.
According to an embodiment of the application, the adjusting module is further configured to: recognizing that the temperature of the outdoor coil is smaller than a first preset temperature threshold value, and controlling a second branch connected with the indoor heat exchanger to be in an opening state; and recognizing that the temperature of the outdoor coil is greater than or equal to the preset temperature threshold value, and controlling the second branch to be in a closed state.
According to an embodiment of the present application, the control apparatus of an air conditioner further includes a determination module for: and determining the opening state of a second branch connected with the indoor heat exchanger according to the opening number and the adjustment direction of the heat exchange area.
According to an embodiment of the application, the adjusting module is further configured to: recognizing that the adjustment direction is to reduce the heat exchange area, and if the opening number indicates that at least one first branch is in an opening state, controlling the second branch to be in a closing state; or recognizing that the adjusting direction is to reduce the heat exchange area, and the opening number indicates that all the first branches are in a closed state, controlling the second branches to be in an open state; or, recognizing that the adjustment direction is to increase the heat exchange area, and if the opening number indicates that at least one first branch is in a closed state, controlling the second branch to be in an open state; or recognizing that the adjusting direction is to increase the heat exchange area, and the opening number indicates that all the first branches are in an opening state, and controlling the second branches to be in a closing state.
According to an embodiment of the application, the determining module is further configured to: identifying the adjusting direction of the heat exchange area, and acquiring a plurality of temperature intervals matched with the adjusting direction; and identifying a target temperature interval in which the temperature of the outdoor coil pipe is positioned, and determining the opening number of the first branch according to the target temperature interval.
According to an embodiment of the application, the determining module is further configured to: acquiring an outdoor environment temperature, and identifying that the outdoor environment temperature is less than or equal to a second preset temperature threshold; recognizing that the air conditioner is operated in a cooling mode and a compressor is in an operating state; determining that the air conditioner is in the low-temperature cooling mode.
According to an embodiment of the application, the adjusting module is further configured to: and continuously detecting the outdoor environment temperature, and if the outdoor environment temperature is greater than the second preset temperature threshold value and the outdoor coil temperature is greater than a third temperature threshold value, controlling the air conditioner to exit the low-temperature refrigeration mode.
In order to achieve the above object, a third embodiment of the present application provides an air conditioner including the control device of the air conditioner.
In order to achieve the above object, a fourth aspect of the present application provides an electronic device, including a memory, a processor, and a program stored in the memory and executable on the processor, where the processor executes the program to implement the control method of the air conditioner.
In order to achieve the above object, a fifth embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements any of the above-mentioned control methods for an air conditioner.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. because the method can identify the change trend of the air conditioner based on the temperature of the outdoor coil after the air conditioner is in the low-temperature refrigeration mode, and further can determine the adjustment mode of the heat exchange area in the outdoor heat exchanger aiming at the change trend of the temperature of the outdoor coil, and control the heat exchange area of the outdoor heat exchanger to dynamically adjust along with the change trend of the temperature of the outdoor coil, the heat exchange quantity of the outdoor heat exchanger is not fixed any more, because the heat exchange area can be adjusted, the control method of the air conditioner can not rely on the starting and stopping of an outdoor fan to control the flow direction of heat, the phenomenon of frosting on the surfaces of an indoor connecting pipe, an outdoor connecting pipe and an indoor unit in the low-temperature refrigeration mode is avoided, the technical problem that the outdoor fan needs to be started and stopped frequently in the low-temperature refrigeration mode.
2. Because when the air conditioner is in the low temperature refrigeration mode in this application, can be according to the trend of change of outdoor coil pipe temperature, through the quantity of opening of the first branch road that connects in the change outdoor heat exchanger to the heat transfer area in the adjustment outdoor heat exchanger has avoided the outdoor coil pipe of air conditioner the phenomenon of frosting to appear, has guaranteed the refrigerating capacity of air conditioner.
3. According to the method and the device, when the condition that the outdoor environment temperature of the air conditioner is too low is identified, the second branch circuit is controlled to be in the open state, so that the heat dissipation area is reduced, the heat flowing into the outdoor unit is reduced, and the temperature of the outdoor coil pipe is further increased; otherwise, the second branch circuit is controlled to be in a closed state, so that heat can directly flow into the outdoor unit through the second branch circuit and be dissipated.
4. According to the method and the device, the air conditioner can automatically exit the low-temperature refrigeration mode after the air conditioner is identified not to be in the low-temperature refrigeration mode, so that the control method of the air conditioner is more intelligent.
Drawings
Fig. 1 is a schematic flowchart illustrating a control method of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present disclosure;
FIG. 3 is a schematic view of a variable area outdoor heat exchanger according to one embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of an outdoor heat exchanger according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit diagram of an outdoor heat exchanger according to another embodiment of the present disclosure;
fig. 6 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present disclosure;
fig. 7 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present disclosure;
fig. 8 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present disclosure;
fig. 9 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present disclosure;
fig. 10 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of a control device of an air conditioner according to an embodiment of the present disclosure;
fig. 12 is a schematic structural view of an air conditioner disclosed in an embodiment of the present application;
fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The following describes a control method and device of an air conditioner, the air conditioner and an electronic device according to an embodiment of the application with reference to the drawings.
Fig. 1 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present disclosure.
As shown in fig. 1, the control method of the air conditioner includes the steps of:
and S101, identifying that the air conditioner is in a low-temperature refrigeration mode.
It should be noted that, when trying to identify whether the air conditioner is in the low-temperature cooling mode, the current operation condition of the air conditioner may be obtained and analyzed, and then, according to the analysis result, whether the current operation condition of the air conditioner satisfies the condition of being in the low-temperature cooling mode is determined. If the running condition of the air conditioner is detected to meet the condition of being in the low-temperature refrigeration mode, identifying that the air conditioner is in the low-temperature refrigeration mode; and if the condition that the running condition of the air conditioner does not meet the condition of being in the low-temperature cooling mode is detected, identifying that the air conditioner is not in the low-temperature cooling mode.
As a possible implementation manner, as shown in fig. 2, the method specifically includes the following steps:
and S1011, acquiring the current operation information of the air conditioner.
And S1012, acquiring the outdoor environment temperature.
It should be noted that, some collecting devices, such as a timer and a temperature sensor, are provided on the air conditioner, and are related to the current operating information of the air conditioner and the temperature of the outdoor environment where the air conditioner is located. The collecting device on the air conditioner can collect in real time or periodically, and the period can be set according to actual conditions.
Optionally, the current operation information of the air conditioner may include: the current operating mode of the air conditioner, the state of the compressor in the air conditioner, etc.
Alternatively, the outdoor ambient temperature of the air conditioner may be detected by a temperature sensor provided on the outdoor heat exchanger, or may be obtained by sending a request for obtaining weather data to the server.
And S1013, identifying that the air conditioner is in a low-temperature refrigeration mode according to the current operation information of the air conditioner and the outdoor environment temperature.
Specifically, the outdoor environment temperature is extracted from the acquired outdoor environment information, and the outdoor environment temperature is compared with a second preset temperature threshold. And if the outdoor environment temperature is greater than a second preset threshold value, identifying that the outdoor environment temperature does not meet the condition of being in the low-temperature refrigeration mode. The second preset temperature threshold value can be set according to actual conditions. For example, the second preset temperature threshold may be set to 15 ℃.
And if the outdoor environment temperature is less than or equal to a second preset threshold value, further judging whether the operation mode of the air conditioner is a refrigeration mode. Specifically, the operation mode of the air conditioner is extracted from the acquired operation information, and whether the operation mode is a cooling mode or not is identified. And if the operation mode is the non-refrigeration mode, identifying that the operation mode does not meet the condition of being in the low-temperature refrigeration mode.
And if the operation mode is the refrigeration mode, further judging whether the compressor is in the operation state. Specifically, the operation state of the compressor is extracted from the acquired operation information, and whether the compressor is in the operation state is identified. And if the compressor is not in the running state, identifying that the running state of the compressor does not meet the condition of being in the low-temperature refrigeration mode.
And if the compressor is in the running state, the condition that the air conditioner currently meets the condition of being in the low-temperature refrigeration mode is indicated, and the air conditioner is identified to be in the low-temperature refrigeration mode.
S102, detecting the temperature of the outdoor coil pipe and identifying the change trend of the temperature of the outdoor coil pipe.
In the embodiment of the present application, an outdoor coil temperature sensor is further disposed on an outdoor side of the air conditioner. The outdoor coil temperature sensor can acquire the temperature of the outdoor coil of the air conditioner in real time or periodically and mark the temperature in sequence. For example, the outdoor coil temperature may be obtained and sequentially marked as t1,t2,t3～tn. Wherein, tnThe outdoor coil temperature acquired at the nth time in the period is acquired, and the time interval between the first time and the second time may be set according to actual conditions, for example, the time interval may be set to 5 minutes.
Further, after the outdoor coil temperature is obtained, the current outdoor coil temperature may be compared with the outdoor coil temperature at the previous time. If the temperature of the outdoor coil at the current moment is greater than that of the outdoor coil at the previous moment, indicating that the temperature of the outdoor coil is gradually increased, identifying the change trend of the temperature of the outdoor coil as rising; if the temperature of the outdoor coil at the current moment is less than the temperature of the outdoor coil at the previous moment, indicating that the temperature of the outdoor coil is gradually reduced, identifying that the change trend of the temperature of the outdoor coil is reduced; and if the temperature of the outdoor coil at the current moment is equal to the temperature of the outdoor coil at the previous moment, indicating that the temperature of the outdoor coil is not changed, identifying the change trend of the temperature of the outdoor coil to be equal.
For example, if tnGreater than tn-1If the outdoor coil temperature is gradually increased, identifying that the change trend of the outdoor coil temperature from the nth-1 th moment to the nth moment is rising; if t isnLess than tn-1If the outdoor coil temperature is gradually reduced, identifying that the change trend of the outdoor coil temperature from the nth-1 th moment to the nth moment is reduced; if t isnIs equal to tn-1And if the outdoor coil temperature is not changed, identifying that the change trend of the outdoor coil temperature from the nth-1 th moment to the nth moment is equal.
When the trend of the outdoor coil temperature is attempted to be identified, the current outdoor coil temperature may be compared with the outdoor coil temperature at the previous moment, or the current outdoor coil temperature may be compared with the outdoor coil temperatures at the previous moments. For example, t may benAnd tn-kA comparison is made to identify trends in the outdoor coil temperature from time n-k to time n.
S103, adjusting the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil.
Specifically, after the variation trend of the temperature of the outdoor coil pipe is obtained, the heat exchange area in the outdoor heat exchanger can be adjusted according to the variation trend. If the temperature of the outdoor coil pipe is identified to be gradually reduced, reducing the heat exchange area of the outdoor heat exchanger; and if the temperature of the outdoor coil pipe is gradually increased, the heat exchange area of the outdoor heat exchanger is increased.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
because the method can identify the change trend of the air conditioner based on the temperature of the outdoor coil after the air conditioner is in the low-temperature refrigeration mode, and further can determine the adjustment mode of the heat exchange area in the outdoor heat exchanger aiming at the change trend of the temperature of the outdoor coil, and control the heat exchange area of the outdoor heat exchanger to dynamically adjust along with the change trend of the temperature of the outdoor coil, the heat exchange quantity of the outdoor heat exchanger is not fixed any more, because the heat exchange area can be adjusted, the control method of the air conditioner can not rely on the starting and stopping of an outdoor fan to control the flow direction of heat, the phenomenon of frosting on the surfaces of an indoor connecting pipe, an outdoor connecting pipe and an indoor unit in the low-temperature refrigeration mode is avoided, the technical problem that the outdoor fan needs to be started and stopped frequently in the low-temperature refrigeration mode.
It should be noted that, in the present application, as shown in fig. 3, an outdoor heat exchanger with a variable heat exchange area is provided, and the outdoor heat exchanger may be composed of a plurality of branches, and each branch is provided with an electromagnetic valve to control the opening and closing of the branch. Therefore, after the air conditioner is identified to be in the low-temperature refrigeration mode, the heat exchange area in the outdoor heat exchanger can be adjusted by controlling the opening and closing of the electromagnetic valve based on the variation trend of the temperature of the outdoor coil.
When the air conditioner is in a non-low-temperature refrigeration mode, the electromagnetic valves in all the branches are in a normally open state.
As a possible implementation manner, as shown in fig. 4, a main path and three first branches may be provided in the circuit structure outside the air conditioner, where the main path communicates between the outdoor heat exchanger and the four-way valve, and the main path includes: a first branch 1 provided with a solenoid valve 1, a first branch 2 provided with a solenoid valve 2, and a first branch 3 provided with a solenoid valve 3. When the air conditioner works, a main path and at least one first branch are communicated between the outdoor heat exchanger and the four-way valve.
Specifically, when trying to adjust the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil, the heat exchange area in the outdoor heat exchanger can be adjusted by changing the opening number of the first branch circuits connected in the outdoor heat exchanger, and then the heat exchanger is controlled to exchange outdoor heat, so that the effect of controlling the temperature of the outdoor coil is achieved, and the frosting phenomenon of the outdoor heat exchanger is avoided.
If the temperature of the outdoor coil pipe is gradually reduced, reducing the opening number of the first branch, and reducing the heat exchange area of the outdoor heat exchanger; if the temperature of the outdoor coil pipe is gradually increased, the heat exchange area of the outdoor heat exchanger is increased by increasing the opening number of the first branch circuits.
For example, a main path, a first branch path 2 and a first branch path 3 are communicated between the outdoor heat exchanger and the four-way valve, and when the temperature of the outdoor coil pipe is gradually reduced, the first branch path 3 can be closed, that is, the opening number of the first branch path is reduced, so that the heat exchange area of the outdoor heat exchanger is reduced; after the temperature of the outdoor coil pipe is gradually increased, the first branch 1 can be opened, namely the opening number of the first branch is increased, so that the heat exchange area of the outdoor heat exchanger is increased.
It should be noted that, in the process of adjusting the heat exchange area in the outdoor heat exchanger, the first branch may be controlled to be gradually opened or gradually closed, and the adjustment sequence is not limited.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
because when the air conditioner is in the low temperature refrigeration mode in this application, can be according to the trend of change of outdoor coil pipe temperature, through the quantity of opening of the first branch road that connects in the change outdoor heat exchanger to the heat transfer area in the adjustment outdoor heat exchanger has avoided the outdoor coil pipe of air conditioner the phenomenon of frosting to appear, has guaranteed the refrigerating capacity of air conditioner.
Further, in practical application, when the outdoor environment temperature is too low, the heat exchange area in the outdoor heat exchanger is adjusted only by arranging the first branch, and the temperature of the outdoor coil pipe cannot be rapidly increased. Therefore, in the application, the circuit structure at the outdoor side can be further adjusted, so that the heat dissipation area is changed, meanwhile, the heat can be controlled to directly flow into the outdoor unit, and the heating speed of the outdoor coil pipe is further increased.
As a possible implementation manner, as shown in fig. 5, a second branch provided with the electromagnetic valve 4 may be arranged in a circuit structure outside the air conditioner in advance, and then the heat may directly flow back to the outdoor heat exchanger by controlling the opening of the second branch, so as to accelerate the increase of the temperature of the coil and reduce the possibility of frosting on the surface of the outdoor heat exchanger. One end of the second branch is connected with a pipeline between the throttling element and the outdoor heat exchanger, and the other end of the second branch is connected with a pipeline between the four-way valve and the indoor heat exchanger.
Alternatively, the second branch may be controlled to be in the normally open state after recognizing that the outdoor coil temperature is lower than a predetermined critical value. As shown in fig. 6, the method specifically includes the following steps:
s201, acquiring a first preset temperature threshold.
The first preset temperature threshold value can be set according to actual conditions. For example, the first preset temperature threshold may be set to 10 ℃.
S202, judging whether the temperature of the outdoor coil is smaller than a first preset temperature threshold value.
After the first preset temperature threshold is obtained, the outdoor coil temperature may be compared with the first preset temperature threshold, and if it is recognized that the outdoor coil temperature is smaller than the first preset temperature threshold, step S203 is executed; if it is recognized that the outdoor coil temperature is greater than or equal to the preset temperature threshold, step S204 is performed.
S203, identifying that the temperature of the outdoor coil is smaller than a first preset temperature threshold value, and controlling a second branch connected with the indoor heat exchanger to be in an opening state.
And S204, identifying that the temperature of the outdoor coil is greater than or equal to a preset temperature threshold, and controlling the second branch to be in a closed state.
Optionally, the opening state of the second branch connected to the indoor heat exchanger may be determined according to the opening number of the first branch and the adjustment direction of the heat exchange area of the outdoor heat exchanger. As shown in fig. 7, the method specifically includes the following steps:
s301, obtaining the adjusting direction of the heat exchange area.
Wherein, the adjustment direction of the heat exchange area is to reduce or increase the heat exchange area.
S302, obtaining the opening number of the first branch.
It should be noted that, for different temperatures of the external coil, the target temperature ranges of the external coil are different, and the number of the first branches is also different. Therefore, in the embodiment of the present application, the number of the first branches needs to be obtained according to the target temperature interval where the temperature of the outdoor coil is located, as shown in fig. 8, the method specifically includes the following steps:
and S3021, acquiring a plurality of temperature intervals matched with the adjustment direction according to the adjustment direction.
It should be noted that before trying to obtain the number of the first branch circuits, a plurality of temperature intervals matched with the adjustment direction may be obtained according to the adjustment direction of the heat exchange area.
For example, if the adjustment direction is identified to reduce the heat exchange area, the temperature interval may be divided, and the first temperature interval is marked as an interval greater than 10 ℃; the marking interval is greater than 9 ℃ and less than or equal to 10 ℃ and is a second temperature interval; the marking interval is greater than 8 ℃ and less than or equal to 9 ℃ and is a third temperature interval; the marking interval is greater than 7 ℃ and less than or equal to 8 ℃ and is a fourth temperature interval; the fifth temperature interval is when the mark interval is less than or equal to 7 ℃.
If the adjustment direction is identified to increase the heat exchange area, the temperature interval can be divided, and the first temperature interval is marked when the temperature interval is less than 8 ℃; the marking interval is greater than or equal to 8 ℃ and less than 9 ℃ and is a second temperature interval; the marking interval is greater than or equal to 9 ℃ and less than 10 ℃ and is a third temperature interval; the marking interval is greater than or equal to 10 ℃ and less than 11 ℃ and is a fourth temperature interval; a fifth temperature interval when the mark interval is greater than or equal to 11 ℃.
And S3022, acquiring a target temperature interval in which the temperature of the outdoor coil is located according to the adjusting direction and the temperature of the outdoor coil.
Specifically, after the adjustment direction and the outdoor coil temperature are obtained, the outdoor coil temperature may be compared with different preset temperature intervals to obtain a target temperature interval in which the outdoor coil temperature is located.
For example, if the adjustment direction is identified to reduce the heat exchange area and the temperature of the external coil is 6 ℃, it is known that the target temperature interval where the current temperature of the outdoor coil is located is the fifth temperature interval.
It should be noted that, in practical application, because a certain temperature return difference can appear in the process of acquiring the temperature of the outdoor coil, in the application, when trying to acquire the target temperature range where the temperature of the outdoor coil is located according to the adjustment direction and the temperature of the outdoor coil, the influence of the temperature return difference on the control of the air conditioner is also comprehensively considered, the accuracy of the acquired temperature of the outdoor coil is further improved, and further, the control of the air conditioner can be more accurate, and the actual needs are better met. The temperature return difference can be set according to actual conditions. For example, the temperature return difference may be set to 1 ℃.
And S3023, determining the opening number of the first branch according to the target temperature interval.
Specifically, a mapping relationship between the target temperature interval and the opening number of the first branch may be preset, and after the target temperature interval is obtained, the mapping relationship is queried, so that the opening number of the first branch may be obtained.
For example, if the adjustment direction is identified to reduce the heat exchange area, the number of the first branches can be set to be 3 when the temperature of the outdoor coil is in the first temperature interval, that is, the target interval is the first temperature interval; when the temperature of the outdoor coil pipe is in a second temperature interval, namely the target interval is the second temperature interval, the opening number of the first branch circuits is 2; when the temperature of the outdoor coil pipe is in a third temperature interval, namely the target interval is the third temperature interval, the opening number of the first branch circuits is 1; when the temperature of the outdoor coil pipe is in a fourth temperature interval, namely the target interval is the fourth temperature interval, the opening number of the first branch circuits is 0; when the temperature of the outdoor coil pipe is in a fifth temperature interval, namely the target interval is the fifth temperature interval, the opening number of the first branch is 0.
If the adjustment direction is identified to increase the heat exchange area, the opening number of the first branch circuits can be set to be 0 when the temperature of the outdoor coil is in a first temperature interval, namely the target interval is the first temperature interval; when the temperature of the outdoor coil pipe is in a second temperature interval, namely the target interval is the second temperature interval, the opening number of the first branch circuits is 1; when the temperature of the outdoor coil pipe is in a third temperature interval, namely the target interval is the third temperature interval, the opening number of the first branch circuits is 2; when the temperature of the outdoor coil pipe is in a fourth temperature interval, namely the target interval is the fourth temperature interval, the opening number of the first branch circuits is 3; when the outdoor coil temperature is in the fifth temperature interval, namely the target interval is the fifth temperature interval, the opening number of the first branch is 3.
And S303, judging whether to open the second branch according to the opening number and the adjustment direction.
It should be noted that, when the temperature of the outdoor coil pipe is gradually reduced, the heat exchange area can be reduced, so that the heat exchanged to the outdoor is reduced, the temperature of the outdoor coil pipe is further increased, and the frosting condition on the surface of the outdoor heat exchanger is avoided.
Specifically, if the adjustment direction is identified to reduce the heat exchange area and the opening number indicates that at least one first branch is in an open state, the second branch is controlled to be in a closed state; or recognizing the adjustment direction to reduce the heat exchange area, and controlling the second branch circuit to be in the open state if the open number indicates that all the first branch circuits are in the closed state.
For example, the adjustment direction is identified to reduce the heat exchange area, and the first branch provided with the solenoid valve 1, the first branch provided with the solenoid valve 2, and the first branch provided with the solenoid valve 3 are all in a closed state, and then the second branch provided with the solenoid valve 4 is controlled to be opened.
When the temperature of the outdoor coil pipe rises gradually, the heat exchange area can be gradually increased, and meanwhile, the control electromagnetic valve 4 rapidly circulates the heat to the outdoor unit to dissipate the heat, so that the temperature of the outdoor coil pipe is increased, and the frosting condition on the surface of the outdoor heat exchanger is avoided.
Specifically, if the adjustment direction is identified as increasing the heat exchange area and the opening number indicates that at least one first branch is in a closed state, the second branch is controlled to be in an open state; or recognizing the adjustment direction to increase the heat exchange area, and controlling the second branch circuit to be in a closed state if the opening number indicates that all the first branch circuits are in an open state.
For example, if the adjustment direction is identified to increase the heat exchange area, and the first branch provided with the solenoid valve 1, the first branch provided with the solenoid valve 2, and the first branch provided with the solenoid valve 3 are all in the closed state, the second branch provided with the solenoid valve 4 is controlled to be opened.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
according to the method and the device, when the condition that the outdoor environment temperature of the air conditioner is too low is identified, the second branch circuit is controlled to be in the open state, so that the heat dissipation area is reduced, the heat flowing into the outdoor unit is reduced, and the temperature of the outdoor coil pipe is further increased; otherwise, the second branch circuit is controlled to be in a closed state, so that heat can directly flow into the outdoor unit through the second branch circuit and be dissipated.
Furthermore, after the heat exchange area in the outdoor heat exchanger is adjusted according to the variation trend of the temperature of the outdoor coil, the outdoor environment temperature can be detected in real time and circularly to judge whether the air conditioner meets the condition of exiting the low-temperature refrigeration mode or not, so that the subsequent operation of the air conditioner is facilitated.
As a possible implementation manner, as shown in fig. 9, the method specifically includes the following steps:
s401, acquiring outdoor environment temperature.
Specifically, the outdoor ambient temperature may be acquired by a temperature sensor provided on the outdoor heat exchanger.
S402, judging whether the outdoor environment temperature is larger than a second preset temperature threshold value.
Specifically, after the outdoor ambient temperature is obtained, the outdoor ambient temperature may be compared with a second preset temperature threshold. If the outdoor environment temperature is greater than the second preset temperature threshold, further executing step S403 to obtain the outdoor coil temperature; and if the outdoor environment temperature is less than or equal to the second preset temperature threshold, returning to the step S401, and continuously acquiring the outdoor environment temperature.
And S403, acquiring the temperature of the outdoor coil.
Specifically, the outdoor coil temperature may be acquired by an outdoor coil temperature sensor disposed at an outside of the air conditioner.
S404, judging whether the temperature of the outdoor coil is larger than a third preset temperature threshold value.
Specifically, after the outdoor coil temperature is obtained, the outdoor coil temperature may be compared with a third preset temperature threshold. If the outdoor coil temperature is greater than the third preset temperature threshold, further executing step S405; and if the outdoor coil temperature is less than or equal to the third preset temperature threshold, returning to the step S403 to continuously acquire the outdoor environment temperature. The third preset temperature threshold may be set according to an actual situation. For example, the second preset temperature threshold may be set to 38 ℃.
S405, recognizing that the outdoor environment temperature is larger than a second preset temperature threshold value and the outdoor coil temperature is larger than a third temperature threshold value, and obtaining the duration of the outdoor environment temperature which is larger than the second preset temperature threshold value and the outdoor coil temperature which is larger than the third temperature threshold value.
Specifically, after it is recognized that the outdoor environment temperature is greater than the second preset temperature threshold and the outdoor coil temperature is greater than the third temperature threshold, the duration that the outdoor environment temperature is greater than the second preset temperature threshold and the outdoor coil temperature is greater than the third temperature threshold may be obtained through the timer.
And S406, judging whether the duration is greater than or equal to a preset duration.
Specifically, after the duration is obtained, the duration may be compared with a preset duration, and if the duration is greater than or equal to the preset duration, the step S407 is executed to control the air conditioner to exit the low-temperature refrigeration mode; and if the duration is less than the preset duration, returning to the step S405 and continuously detecting the duration.
And S407, if the identification duration is greater than or equal to the preset duration, controlling the air conditioner to exit the low-temperature refrigeration mode.
Specifically, after the condition that the air conditioner is quitted from the low-temperature refrigeration mode is identified, all the electromagnetic valves of the first branch can be controlled to be in a normally open state, and the electromagnetic valves of the second branch are controlled to be in a normally closed state.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
according to the method and the device, the air conditioner can automatically exit the low-temperature refrigeration mode after the air conditioner is identified not to be in the low-temperature refrigeration mode, so that the control method of the air conditioner is more intelligent.
Fig. 10 is a flowchart illustrating a method for controlling an air conditioner according to another embodiment of the present disclosure. As shown in fig. 10, the method specifically includes the following steps:
s501, obtaining the outdoor environment temperature.
Specifically, the outdoor ambient temperature may be acquired by a temperature sensor provided on the outdoor heat exchanger.
And S502, acquiring the operation mode of the air conditioner and the operation state of the compressor.
And S503, judging whether the air conditioner is in a low-temperature cooling mode or not.
If the outdoor environment temperature is identified to be less than or equal to a second preset temperature threshold value, the air conditioner is operated in the refrigeration mode, and the compressor is in an operation state, the air conditioner is determined to be in the low-temperature refrigeration mode; and if the recognition result is other conditions, determining that the air conditioner is not in the low-temperature cooling mode.
S504, acquiring the temperature of the outdoor coil.
Specifically, the outdoor coil temperature may be acquired by a temperature sensor disposed at an outside of the air conditioner.
And S505, identifying the variation trend of the outdoor coil temperature.
Wherein, the trend of the temperature of the outdoor coil comprises gradual reduction and gradual rise.
And S506, adjusting the opening number of the first branch according to the change trend.
If the temperature of the outdoor coil pipe is gradually reduced, the heat exchange area of the outdoor heat exchanger can be reduced by reducing the opening number of the first branch circuits; if the temperature of the outdoor coil pipe is gradually increased, the heat exchange area of the outdoor heat exchanger can be increased by increasing the opening number of the first branch circuits.
And S507, adjusting the opening and closing states of the second branch according to the opening number and the adjustment direction of the heat exchange area.
If the adjustment direction is identified to reduce the heat exchange area and the opening number indicates that at least one first branch is in an opening state, controlling a second branch to be in a closing state; or recognizing the adjustment direction to reduce the heat exchange area, and controlling the second branch circuit to be in an open state if the opening number indicates that all the first branch circuits are in a closed state;
if the adjustment direction is identified to increase the heat exchange area and the opening number indicates that at least one first branch is in a closed state, controlling a second branch to be in an open state; or recognizing the adjustment direction to increase the heat exchange area, and controlling the second branch circuit to be in a closed state if the opening number indicates that all the first branch circuits are in an open state.
And S508, judging whether the air conditioner meets the condition of exiting the low-temperature refrigeration mode currently.
If the outdoor environment temperature is greater than the second preset temperature threshold, the outdoor coil temperature is greater than the third temperature threshold, the duration of the outdoor environment temperature being greater than the second preset temperature threshold and the outdoor coil temperature being greater than the third temperature threshold is greater than or equal to the preset duration, the condition that the air conditioner exits the low-temperature refrigeration mode is met currently; and if the recognition result is other conditions, determining that the air conditioner is not in the low-temperature cooling mode.
And S509, controlling the air conditioner to exit the low-temperature refrigeration mode.
Specifically, after the condition that the air conditioner is judged to meet the condition of exiting the low-temperature refrigeration mode is identified, all the electromagnetic valves of the first branch are controlled to be in a normally open state, and the electromagnetic valves of the second branch are controlled to be in a normally closed state.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. because the method can identify the change trend of the air conditioner based on the temperature of the outdoor coil after the air conditioner is in the low-temperature refrigeration mode, and further can determine the adjustment mode of the heat exchange area in the outdoor heat exchanger aiming at the change trend of the temperature of the outdoor coil, and control the heat exchange area of the outdoor heat exchanger to dynamically adjust along with the change trend of the temperature of the outdoor coil, the heat exchange quantity of the outdoor heat exchanger is not fixed any more, because the heat exchange area can be adjusted, the control method of the air conditioner can not rely on the starting and stopping of an outdoor fan to control the flow direction of heat, the phenomenon of frosting on the surfaces of an indoor connecting pipe, an outdoor connecting pipe and an indoor unit in the low-temperature refrigeration mode is avoided, the technical problem that the outdoor fan needs to be started and stopped frequently in the low-temperature refrigeration mode.
2. Because when the air conditioner is in the low temperature refrigeration mode in this application, can be according to the trend of change of outdoor coil pipe temperature, through the quantity of opening of the first branch road that connects in the change outdoor heat exchanger to the heat transfer area in the adjustment outdoor heat exchanger has avoided the outdoor coil pipe of air conditioner the phenomenon of frosting to appear, has guaranteed the refrigerating capacity of air conditioner.
3. According to the method and the device, when the condition that the outdoor environment temperature of the air conditioner is too low is identified, the second branch circuit is controlled to be in the open state, so that the heat dissipation area is reduced, the heat flowing into the outdoor unit is reduced, and the temperature of the outdoor coil pipe is further increased; otherwise, the second branch circuit is controlled to be in a closed state, so that heat can directly flow into the outdoor unit through the second branch circuit and be dissipated.
4. According to the method and the device, the air conditioner can automatically exit the low-temperature refrigeration mode after the air conditioner is identified not to be in the low-temperature refrigeration mode, so that the control method of the air conditioner is more intelligent.
Based on the same application concept, the embodiment of the application also provides a device corresponding to the control method of the air conditioner.
Fig. 11 is a schematic structural diagram of a control device of an air conditioner according to an embodiment of the present application. As shown in fig. 11, the control device 100 of the air conditioner includes: a pattern recognition module 11, a trend recognition module 12 and an adjustment module 13.
The mode identification module 11 is used for identifying that the air conditioner is in a low-temperature refrigeration mode; the trend identification module 12 is used for detecting the temperature of the outdoor coil and identifying the variation trend of the temperature of the outdoor coil; and the adjusting module 13 is used for adjusting the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil.
According to an embodiment of the present application, the adjusting module 13 is further configured to: and adjusting the heat exchange area in the outdoor heat exchanger by changing the opening number of the first branches connected in the outdoor heat exchanger.
According to an embodiment of the present application, the adjusting module 13 is further configured to: and recognizing that the temperature of the outdoor coil pipe is gradually reduced, and reducing the heat exchange area of the outdoor heat exchanger by reducing the opening number of the first branch.
According to an embodiment of the present application, the adjusting module 13 is further configured to: recognizing that the temperature of the outdoor coil pipe gradually rises, and increasing the opening number of the first branch to increase the heat exchange area of the outdoor heat exchanger.
According to an embodiment of the present application, the adjusting module 13 is further configured to: recognizing that the temperature of the outdoor coil is smaller than a first preset temperature threshold value, and controlling a second branch connected with the indoor heat exchanger to be in an opening state; and recognizing that the temperature of the outdoor coil is greater than or equal to the preset temperature threshold value, and controlling the second branch to be in a closed state.
According to an embodiment of the present application, the control device of the air conditioner further includes a determination module 14 for: and determining the opening state of a second branch connected with the indoor heat exchanger according to the opening number and the adjustment direction of the heat exchange area.
According to an embodiment of the present application, the adjusting module 13 is further configured to: recognizing that the adjustment direction is to reduce the heat exchange area, and if the opening number indicates that at least one first branch is in an opening state, controlling the second branch to be in a closing state; or recognizing that the adjusting direction is to reduce the heat exchange area, and the opening number indicates that all the first branches are in a closed state, controlling the second branches to be in an open state; or, recognizing that the adjustment direction is to increase the heat exchange area, and if the opening number indicates that at least one first branch is in a closed state, controlling the second branch to be in an open state; or recognizing that the adjusting direction is to increase the heat exchange area, and the opening number indicates that all the first branches are in an opening state, and controlling the second branches to be in a closing state.
According to an embodiment of the application, the determining module 14 is further configured to: identifying the adjusting direction of the heat exchange area, and acquiring a plurality of temperature intervals matched with the adjusting direction; and identifying a target temperature interval in which the temperature of the outdoor coil pipe is positioned, and determining the opening number of the first branch according to the target temperature interval.
According to an embodiment of the application, the determining module 14 is further configured to: acquiring an outdoor environment temperature, and identifying that the outdoor environment temperature is less than or equal to a second preset temperature threshold; recognizing that the air conditioner is operated in a cooling mode and a compressor is in an operating state; determining that the air conditioner is in the low-temperature cooling mode.
According to an embodiment of the present application, the adjusting module 13 is further configured to: and continuously detecting the outdoor environment temperature, and if the outdoor environment temperature is greater than the second preset temperature threshold value and the outdoor coil temperature is greater than a third temperature threshold value, controlling the air conditioner to exit the low-temperature refrigeration mode.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
because the method can identify the change trend of the air conditioner based on the temperature of the outdoor coil after the air conditioner is in the low-temperature refrigeration mode, and further can determine the adjustment mode of the heat exchange area in the outdoor heat exchanger aiming at the change trend of the temperature of the outdoor coil, and control the heat exchange area of the outdoor heat exchanger to dynamically adjust along with the change trend of the temperature of the outdoor coil, the heat exchange quantity of the outdoor heat exchanger is not fixed any more, because the heat exchange area can be adjusted, the control method of the air conditioner can not rely on the starting and stopping of an outdoor fan to control the flow direction of heat, the phenomenon of frosting on the surfaces of an indoor connecting pipe, an outdoor connecting pipe and an indoor unit in the low-temperature refrigeration mode is avoided, the technical problem that the outdoor fan needs to be started and stopped frequently in the low-temperature refrigeration mode.
Since the device described in the embodiments of the present application is a device used for implementing the control method of the air conditioner provided in the embodiments of the present application, based on the method described in the embodiments of the present application, a person skilled in the art can understand the specific structure and the modification of the system, and thus the detailed description is omitted here. All the devices adopted by the control method of the air conditioner provided by the embodiment of the application belong to the protection scope of the application.
As shown in fig. 12, an air conditioner 200 according to an embodiment of the present application includes the control device 100 of the air conditioner.
As shown in fig. 13, an embodiment of the present application further provides an electronic device 300, where the electronic device 300 includes: the memory 31, the processor 32 and the computer program stored on the memory 31 and capable of running on the processor, the processor executes the program to realize the control method of the air conditioner.
In order to implement the above embodiments, the present invention also proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described control method of the air conditioner.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (14)

1. A control method of an air conditioner is characterized by comprising the following steps:
recognizing that the air conditioner is in a low-temperature refrigeration mode;
detecting the temperature of an outdoor coil and identifying the variation trend of the temperature of the outdoor coil;
and adjusting the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil pipe.
2. The method according to claim 1, wherein a main path and at least one first branch path are communicated between the outdoor heat exchanger and the four-way valve; the adjusting of the heat exchange area in the outdoor heat exchanger comprises:
and adjusting the heat exchange area in the outdoor heat exchanger by changing the opening number of the first branches connected in the outdoor heat exchanger.
3. The method of claim 2, wherein said adjusting the heat exchange area in the outdoor heat exchanger based on the trend of the outdoor coil temperature comprises:
and recognizing that the temperature of the outdoor coil pipe is gradually reduced, and reducing the heat exchange area of the outdoor heat exchanger by reducing the opening number of the first branch.
4. The method of claim 2, wherein said adjusting the heat exchange area in the outdoor heat exchanger based on the trend of the outdoor coil temperature comprises:
recognizing that the temperature of the outdoor coil pipe gradually rises, and increasing the opening number of the first branch to increase the heat exchange area of the outdoor heat exchanger.
5. The method of claim 3 or 4, wherein the air conditioner further comprises a second branch having one end connected to a pipe between a throttling element and the outdoor heat exchanger and the other end connected to a pipe between the four-way valve and the indoor heat exchanger;
the method further comprises the following steps:
recognizing that the temperature of the outdoor coil is smaller than a first preset temperature threshold value, and controlling a second branch connected with the indoor heat exchanger to be in an opening state;
and recognizing that the temperature of the outdoor coil is greater than or equal to the preset temperature threshold value, and controlling the second branch to be in a closed state.
6. The method of claim 3 or 4, further comprising:
and determining the opening state of a second branch connected with the indoor heat exchanger according to the opening number and the adjustment direction of the heat exchange area.
7. The method according to claim 6, wherein the adjusting the opening state of the second branch connected with the indoor heat exchanger according to the opening number and the adjustment direction of the heat exchange area comprises:
recognizing that the adjustment direction is to reduce the heat exchange area, and if the opening number indicates that at least one first branch is in an opening state, controlling the second branch to be in a closing state; or recognizing that the adjusting direction is to reduce the heat exchange area, and the opening number indicates that all the first branches are in a closed state, controlling the second branches to be in an open state;
alternatively, the first and second electrodes may be,
recognizing that the adjustment direction is to increase the heat exchange area, and if the opening number indicates that at least one first branch is in a closed state, controlling the second branch to be in an open state; or recognizing that the adjusting direction is to increase the heat exchange area, and the opening number indicates that all the first branches are in an opening state, and controlling the second branches to be in a closing state.
8. The method according to any of claims 2-4, wherein determining the number of activations of the first leg comprises:
identifying the adjusting direction of the heat exchange area, and acquiring a plurality of temperature intervals matched with the adjusting direction;
and identifying a target temperature interval in which the temperature of the outdoor coil pipe is positioned, and determining the opening number of the first branch according to the target temperature interval.
9. The method according to any one of claims 1 to 5, wherein the identifying that the air conditioner is in a low temperature cooling mode comprises:
acquiring an outdoor environment temperature, and identifying that the outdoor environment temperature is less than or equal to a second preset temperature threshold;
recognizing that the air conditioner is operated in a cooling mode and a compressor is in an operating state;
determining that the air conditioner is in the low-temperature cooling mode.
10. The method of claim 9, further comprising:
and continuously detecting the outdoor environment temperature, and if the outdoor environment temperature is greater than the second preset temperature threshold value and the outdoor coil temperature is greater than a third temperature threshold value, controlling the air conditioner to exit the low-temperature refrigeration mode.
11. A control apparatus of an air conditioner, comprising:
the mode identification module is used for identifying that the air conditioner is in a low-temperature refrigeration mode;
the trend identification module is used for detecting the temperature of the outdoor coil and identifying the change trend of the temperature of the outdoor coil;
and the adjusting module is used for adjusting the heat exchange area in the outdoor heat exchanger according to the change trend of the temperature of the outdoor coil.
12. An air conditioner, comprising: the control device of an air conditioner according to claim 11.
13. An electronic device comprising a memory, a processor;
wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, for implementing the control method of the air conditioner as set forth in any one of claims 1 to 10.
14. A computer-readable storage medium storing a computer program, characterized in that the program realizes the control method of the air conditioner according to any one of claims 1 to 10 when being executed by a processor.
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CN114484806A (en) * 2022-03-01 2022-05-13 青岛海尔空调器有限总公司 Control method and control system for air conditioner sterilization, electronic equipment and storage medium
CN114608136A (en) * 2022-03-01 2022-06-10 青岛海尔空调器有限总公司 Control method and control system for self-cleaning of air conditioner, electronic equipment and storage medium
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