CN112161390A - Electronic expansion valve control method and device and air conditioner - Google Patents

Electronic expansion valve control method and device and air conditioner Download PDF

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Publication number
CN112161390A
CN112161390A CN202010970353.XA CN202010970353A CN112161390A CN 112161390 A CN112161390 A CN 112161390A CN 202010970353 A CN202010970353 A CN 202010970353A CN 112161390 A CN112161390 A CN 112161390A
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exhaust temperature
temperature
preset target
preset
air conditioner
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CN112161390B (en
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杜煜昊
杨秋石
莫灼均
潘卫琼
黄聪
闫志斌
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a method and a device for controlling an electronic expansion valve and an air conditioner, wherein the method comprises the following steps: under the condition that a compressor is started when an air conditioner is started, acquiring the real-time running frequency of the compressor, and determining whether the real-time running frequency of the compressor is equal to a preset target frequency or not; under the condition that the real-time running frequency is determined not to be equal to the preset target frequency, the current working condition temperature is obtained; determining a target exhaust temperature range according to a preset target exhaust temperature and the current working condition temperature; and adjusting the electronic expansion valve of the air conditioner based on the target exhaust temperature range so that the actual exhaust temperature of the air conditioner is within the target exhaust temperature range. The scheme solves the problem that the electronic expansion valve is easy to overshoot when the air conditioner is started under low-temperature and high-temperature working conditions, can accelerate the response of the electronic expansion valve, enables the air conditioner to tend to be stable as soon as possible after the air conditioner is started, and ensures the stable operation of the whole air conditioner.

Description

Electronic expansion valve control method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling an electronic expansion valve and an air conditioner.
Background
When the variable frequency air conditioner is started to operate, the whole variable frequency air conditioner is expected to operate to the target exhaust temperature and the target frequency as soon as possible, namely, the air conditioner is expected to operate stably under the current working condition without large frequency and valve step fluctuation.
However, under low-temperature working conditions and high-temperature working conditions, the unit is greatly influenced by the outside, the main control program continuously adjusts the valve steps so that the exhaust temperature of the unit is close to the preset target exhaust temperature under the working conditions, and the change of the valve step adjustment reflected to the state of the whole unit has certain hysteresis so that the valve step is subjected to overshoot and valve step oscillation fluctuation. Therefore, the unit is not easily adjusted to a stable operation state under low-temperature and high-temperature working conditions.
Aiming at the problem that the electronic expansion valve is easy to overshoot when the air conditioner is started under the working conditions of low temperature and high temperature, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling an electronic expansion valve and an air conditioner, wherein the method comprises the following steps: under the condition that a compressor is started when an air conditioner is started, acquiring the real-time running frequency of the compressor, and determining whether the real-time running frequency of the compressor is equal to a preset target frequency or not; under the condition that the real-time running frequency is determined not to be equal to the preset target frequency, the current working condition temperature is obtained; determining a target exhaust temperature range according to a preset target exhaust temperature and the current working condition temperature; and adjusting the electronic expansion valve of the air conditioner based on the target exhaust temperature range so that the actual exhaust temperature of the air conditioner is within the target exhaust temperature range.
In one embodiment, determining the target exhaust temperature range according to the preset target exhaust temperature and the current operating condition temperature comprises: determining whether the current working condition temperature is lower than a first preset temperature; in the event that it is determined that the current operating condition temperature is less than a first preset temperature, the target exhaust temperature range is determined to be between a preset target exhaust temperature and a first exhaust temperature, wherein the first exhaust temperature is higher than the preset target exhaust temperature.
In one embodiment, after determining whether the current operating condition temperature is lower than the first preset temperature, the method further comprises: under the condition that the current working condition temperature is not lower than the first preset temperature, determining whether the current working condition temperature is higher than a second preset temperature or not, wherein the second preset temperature is higher than the first preset temperature; and under the condition that the current working condition temperature is determined to be higher than a second preset temperature, determining the target exhaust temperature range to be between the second exhaust temperature and the preset target exhaust temperature, wherein the second exhaust temperature is lower than the preset target exhaust temperature.
In one embodiment, after determining whether the current operating condition temperature is higher than the second preset temperature, the method further comprises: and under the condition that the current working condition temperature is not higher than the second preset temperature, determining the target exhaust temperature range to be equal to the preset target exhaust temperature.
In one embodiment, after determining whether the real-time operating frequency of the compressor is equal to the preset target frequency, the method further comprises: and under the condition that the real-time operation frequency of the compressor is determined to be equal to the preset target frequency, adjusting the electronic expansion valve according to the preset target exhaust temperature, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
In one embodiment, adjusting the electronic expansion valve according to a preset target exhaust temperature so that an actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature includes: repeating the following steps until the absolute value of the temperature difference in the preset time period is less than the preset temperature difference: acquiring the actual exhaust temperature of the air conditioner at the current moment; determining whether the actual exhaust temperature at the current moment is equal to a preset target exhaust temperature; under the condition that the actual exhaust temperature at the current moment is determined to be equal to the preset target exhaust temperature, acquiring the actual exhaust temperature of the air conditioner at the previous moment; and calculating the absolute value of the temperature difference between the actual exhaust temperature at the current moment and the actual exhaust temperature at the previous moment.
In one embodiment, adjusting the electronic expansion valve according to a preset target exhaust temperature so that an actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature includes: acquiring the actual exhaust temperature of the air conditioner, the time corresponding to the actual exhaust temperature and the valve step of the electronic expansion valve; determining whether the actual exhaust temperature is equal to a preset target exhaust temperature; taking time corresponding to the actual exhaust temperature as characteristic time under the condition that the actual exhaust temperature is equal to the preset target exhaust temperature; determining a maximum actual exhaust temperature, a minimum actual exhaust temperature, a maximum valve step and a minimum valve step in a time period between the two characteristic times; determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step; and adjusting the electronic expansion valve according to the preset target exhaust temperature and the valve step range of the electronic expansion valve, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
In one embodiment, determining a valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step includes:
determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step satisfy a first inequality, wherein the first inequality includes:
Figure BDA0002683806870000031
wherein, TPre-arrangingTo the preset target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxIs the maximum actual exhaust temperature, BmaxFor said maximum valve step, BminK is a correction parameter for the minimum valve step;
and under the condition of meeting the first inequality, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step.
In one embodiment, determining a valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step includes: determining the valve step range of the electronic expansion valve as follows:
Figure BDA0002683806870000032
wherein, TPre-arrangingTo preset a target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxTo maximum actual exhaust temperature, BmaxTo the maximum valve step, BminK is the correction parameter for the minimum valve step.
In one embodiment, after determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step satisfy the first inequality, further comprising: in the case where the first inequality is not satisfied, the valve step range of the electronic expansion valve is determined as:
[Bmin，Bmax]；
wherein, BmaxTo the maximum valve step, BminThe minimum valve step.
An embodiment of the present invention further provides an electronic expansion valve control apparatus, including: the first determining module is used for acquiring the real-time running frequency of the compressor under the condition that the compressor is started when the air conditioner is started, and determining whether the real-time running frequency of the compressor is equal to a preset target frequency or not; the acquisition module is used for acquiring the current working condition temperature under the condition that the real-time running frequency is determined not to be equal to the preset target frequency; the second determining module is used for determining a target exhaust temperature range according to a preset target exhaust temperature and the current working condition temperature; and the adjusting module is used for adjusting the electronic expansion valve of the air conditioner based on the target exhaust temperature range, so that the actual exhaust temperature of the air conditioner is in the target exhaust temperature range.
The embodiment of the invention also provides an air conditioner, which comprises the electronic expansion valve control device in the embodiment.
An embodiment of the present invention further provides a computer device, where the computer device includes: a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor implements the steps of the electronic expansion valve control method described in any of the above embodiments when executing the computer program.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the electronic expansion valve control method described in any of the above embodiments.
In the above embodiment, after the air conditioner starts the compressor, when the compressor does not operate to the target frequency, the target exhaust temperature range is set according to the preset target exhaust temperature and the current working condition temperature, and the electronic expansion valve is adjusted, so that the actual exhaust temperature of the air conditioner is within the target exhaust temperature range, and the electronic expansion valve can be prevented from being over-adjusted under a severe working condition, thereby accelerating the response of the electronic expansion valve, enabling the air conditioner to tend to be stable as soon as possible after starting the air conditioner, and ensuring the stable operation of the whole machine.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of an electronic expansion valve control method according to an embodiment of the present invention;
FIG. 2 is a flow chart of an electronic expansion valve control method according to an embodiment of the present invention;
FIG. 3 is a flow chart of an electronic expansion valve control method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an electronic expansion valve control apparatus according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
An embodiment of the present application provides a method for controlling an electronic expansion valve, and fig. 1 shows a flowchart of the method for controlling an electronic expansion valve in an embodiment of the present application. Although the present application provides method operational steps or apparatus configurations as illustrated in the following examples or figures, more or fewer operational steps or modular units may be included in the methods or apparatus based on conventional or non-inventive efforts. In the case of steps or structures which do not logically have the necessary cause and effect relationship, the execution sequence of the steps or the module structure of the apparatus is not limited to the execution sequence or the module structure described in the embodiments and shown in the drawings of the present application. When the described method or module structure is applied in an actual device or end product, the method or module structure according to the embodiments or shown in the drawings can be executed sequentially or executed in parallel (for example, in a parallel processor or multi-thread processing environment, or even in a distributed processing environment).
Specifically, as shown in fig. 1, an embodiment of the present application provides an electronic expansion valve control method, which may include the following steps:
step S101, acquiring the real-time running frequency of the compressor under the condition that the compressor is started when the air conditioner is started, and determining whether the real-time running frequency of the compressor is equal to a preset target frequency.
And S102, acquiring the current working condition temperature under the condition that the real-time running frequency is not equal to the preset target frequency.
And step S103, determining a target exhaust temperature range according to a preset target exhaust temperature and the current working condition temperature.
And step S104, adjusting the electronic expansion valve of the air conditioner based on the target exhaust temperature range, so that the actual exhaust temperature of the air conditioner is in the target exhaust temperature range.
Specifically, the electronic expansion valve control method in the present embodiment may be applied to a variable frequency air conditioner. The preset target frequency may be a target frequency for the operation of the compressor, that is, a frequency at which the stable operation of the compressor is expected. The preset target frequency may be known or determined according to the environmental condition and the overall state. For example, the preset target frequency may be determined according to an outdoor ambient temperature and an indoor ambient temperature at which the air conditioner is currently operated and an operation mode of the air conditioner.
Wherein the preset target exhaust temperature may be an exhaust temperature at which the air conditioner stably operates. The preset target exhaust temperature may be known or determined according to the environmental condition and the state of the whole machine. For example, the preset target discharge temperature may be determined according to the outdoor ambient temperature and the indoor ambient temperature at which the air conditioner is currently operated and the operation mode of the air conditioner.
Generally, a period of time is required after the inverter air conditioner is turned on until the inverter air conditioner is operated to a target frequency, for example, about 10 minutes to 20 minutes. During this period, if the electronic expansion valve is directly adjusted so that the actual exhaust temperature of the air conditioner is equal to the preset target exhaust temperature, the electronic expansion valve may overshoot. Therefore, under the condition that the air conditioner starts the compressor to start, the running frequency of the compressor, namely the real-time running frequency of the compressor, can be obtained in real time, and whether the real-time running frequency of the compressor is equal to the preset target frequency or not is determined.
In the case where it is determined that the real-time operating frequency of the compressor is not equal to the preset target frequency, a preset target exhaust temperature range may be set to adjust the electronic expansion valve, i.e., the valve step of the electronic expansion valve, based on the target exhaust temperature range. The valve step of the electronic expansion valve is the opening degree of the electronic expansion valve. For example, the valve steps of the electronic expansion valve may be adjusted based on the temperature difference between the actual exhaust temperature and the target exhaust temperature range. The current operating condition temperature can be acquired. Wherein the current operating condition temperature may be a current outdoor ambient temperature. After obtaining the current operating condition temperature, a target exhaust temperature range may be determined based on a preset target exhaust temperature and the current operating condition temperature.
After determining the target exhaust temperature range, a valve step of an electronic expansion valve of the air conditioner may be adjusted based on the determined target exhaust temperature range such that an actual exhaust temperature of the air conditioner is within the target exhaust temperature range.
In the above embodiment, after the air conditioner starts the compressor, when the compressor does not operate to the target frequency, the target exhaust temperature range is set according to the preset target exhaust temperature and the current working condition temperature, and the electronic expansion valve is adjusted, so that the actual exhaust temperature of the air conditioner is within the target exhaust temperature range, and the electronic expansion valve can be prevented from being over-adjusted under a severe working condition, thereby accelerating the response of the electronic expansion valve, enabling the air conditioner to tend to be stable as soon as possible after starting the air conditioner, and ensuring the stable operation of the whole machine.
Further, in one embodiment, determining the target exhaust temperature range according to the preset target exhaust temperature and the current operating condition temperature may include: determining whether the current working condition temperature is lower than a first preset temperature; in the event that it is determined that the current operating condition temperature is less than a first preset temperature, the target exhaust temperature range is determined to be between a preset target exhaust temperature and a first exhaust temperature, wherein the first exhaust temperature is higher than the preset target exhaust temperature.
Specifically, under low temperature conditions, the exhaust temperature of the air conditioner may be affected by the low temperature environment. In the case where it is determined that the current operating condition temperature is lower than the first preset temperature, it may be determined that the current operating condition is a low temperature operating condition. The first preset temperature can be set according to actual conditions. For example, the first preset temperature may be set to 0 ℃, 4 ℃, or the like.
The target exhaust gas temperature range may be set to be between a preset target exhaust gas temperature and a first exhaust gas temperature higher than the preset target exhaust gas temperature. For example, the first exhaust temperature may be about 3 ℃ to 8 ℃ higher than the preset target exhaust temperature. For example, the first exhaust temperature may be 3 ℃, 5 ℃, or 8 ℃ or the like higher than the preset target exhaust temperature. Thereafter, the valve step of the electronic expansion valve may be adjusted to bring the exhaust temperature of the air conditioner within the target exhaust temperature range.
In the above embodiment, under the low-temperature working condition, the expansion valve is adjusted to enable the exhaust temperature to be between the preset target exhaust temperature and the first exhaust temperature higher than the preset target exhaust temperature, so that the influence of the low-temperature working condition on the exhaust temperature of the air conditioner can be reduced, thereby avoiding the overshoot of the electronic expansion valve, accelerating the response of the electronic expansion valve, reducing the oscillation fluctuation of the valve step, enabling the air conditioner to tend to be stable as soon as possible when being started, and ensuring the stable operation of the whole machine.
Further, in one embodiment, after determining whether the current operating condition temperature is lower than the first preset temperature, the method may further include: under the condition that the current working condition temperature is not lower than the first preset temperature, determining whether the current working condition temperature is higher than a second preset temperature or not, wherein the second preset temperature is higher than the first preset temperature; and under the condition that the current working condition temperature is determined to be higher than a second preset temperature, determining the target exhaust temperature range to be between the second exhaust temperature and the preset target exhaust temperature, wherein the second exhaust temperature is lower than the preset target exhaust temperature.
Specifically, under high temperature conditions, the exhaust temperature of the air conditioner may be affected by the high temperature environment. Under the condition that the temperature of the current working condition is higher than the second preset temperature, the current working condition can be determined to be a high-temperature working condition. Wherein, the second preset temperature can be set according to actual conditions. For example, the second preset temperature may be set to 35 ℃, 38 ℃, or 40 ℃, etc.
The target exhaust gas temperature range may be set to be between a second exhaust gas temperature lower than the preset target exhaust gas temperature and the preset target exhaust gas temperature. For example, the second exhaust temperature may be about 3 ℃ to 10 ℃ lower than the preset target exhaust temperature. For example, the second exhaust temperature may be 3 ℃, 5 ℃, or 10 ℃ or the like lower than the preset target exhaust temperature. Thereafter, the valve step of the electronic expansion valve may be adjusted to bring the exhaust temperature of the air conditioner within the target exhaust temperature range.
In the above embodiment, under the high-temperature working condition, the expansion valve is adjusted to enable the exhaust temperature to be between the second exhaust temperature lower than the preset target exhaust temperature and the preset target exhaust temperature, so that the influence of the high-temperature working condition on the exhaust temperature of the air conditioner can be reduced, the overshoot of the electronic expansion valve can be avoided, the response of the electronic expansion valve is accelerated, the valve step oscillation fluctuation is reduced, the air conditioner tends to be stable as soon as possible when being started, and the stable operation of the whole machine is guaranteed.
Further, in one embodiment, after determining whether the current operating temperature is higher than the second preset temperature, the method may further include: and under the condition that the current working condition temperature is not higher than the second preset temperature, determining the target exhaust temperature range to be equal to the preset target exhaust temperature.
Specifically, under normal temperature conditions, that is, under the condition that the outdoor ambient temperature is between the first preset temperature and the second preset temperature, the exhaust temperature of the air conditioner is less affected by the ambient temperature. Therefore, the valve step of the electronic expansion valve can be directly adjusted according to the target exhaust temperature, so that the exhaust temperature of the air conditioner is equal to the preset target exhaust temperature. In the above embodiment, under the normal temperature condition, the response of the electronic expansion valve can be accelerated by directly adjusting the electronic expansion valve according to the target exhaust temperature, so that the air conditioner tends to be stable as soon as possible.
Further, in an embodiment, after determining whether the real-time operating frequency of the compressor is equal to the preset target frequency, the method may further include: and under the condition that the real-time operation frequency of the compressor is determined to be equal to the preset target frequency, adjusting the electronic expansion valve according to the preset target exhaust temperature, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
Specifically, after the air conditioner operates for a period of time, the real-time operating frequency of the compressor is equal to the preset target frequency. In this case, the valve step of the electronic expansion valve may be adjusted according to the preset target exhaust temperature so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
Further, in one embodiment, adjusting the electronic expansion valve according to the preset target exhaust temperature so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature may include: repeating the following steps until the absolute value of the temperature difference in the preset time period is less than the preset temperature difference: acquiring the actual exhaust temperature of the air conditioner at the current moment; determining whether the actual exhaust temperature at the current moment is equal to a preset target exhaust temperature; under the condition that the actual exhaust temperature at the current moment is determined to be equal to the preset target exhaust temperature, acquiring the actual exhaust temperature of the air conditioner at the previous moment; and calculating the absolute value of the temperature difference between the actual exhaust temperature at the current moment and the actual exhaust temperature at the previous moment.
Specifically, in the process of adjusting the electronic expansion valve according to the preset target exhaust temperature to stabilize the actual exhaust temperature of the air conditioner to the preset target exhaust temperature, whether the actual exhaust temperature is stabilized to the preset target exhaust temperature or not can be judged in real time. The actual exhaust temperature of the air conditioner may be acquired in real time, and may be acquired once every preset time period, for example. For example, the preset time period may be 2 seconds to 10 seconds. It may be determined whether the acquired actual exhaust temperature is equal to a preset target exhaust temperature.
In the case where it is determined that the obtained actual exhaust temperature is equal to the preset target exhaust temperature, it may be determined whether the actual exhaust temperature is stable. The absolute value of the temperature difference between the actual exhaust temperature at the current moment and the actual exhaust temperature at the previous moment of the air conditioner can be calculated, and whether the absolute value of the temperature difference is smaller than the preset temperature difference or not can be judged. Wherein, the preset temperature difference can be set according to actual requirements. Illustratively, the preset temperature difference may be set to 0.1 ℃ to 0.3 ℃, for example, may be set to 0.1 ℃, 0.2 ℃, or 0.3 ℃, or the like.
And under the condition that the absolute value of the temperature difference is smaller than the preset temperature difference, judging whether the absolute values of the temperature difference in the preset time period are smaller than the preset temperature difference. And if so, determining that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature. Otherwise, repeating the steps until the absolute value of the temperature difference in the preset time period is smaller than the preset temperature difference. The preset time period can be set according to actual conditions and requirements. For example, the preset time period may be set to 3 minutes, 5 minutes, 8 minutes, 10 minutes, or the like. The method comprises the steps of obtaining the actual exhaust temperature of the air conditioner, and judging whether absolute values of temperature difference in a preset time period are smaller than a preset temperature difference or not under the condition that the actual exhaust temperature is equal to a preset target exhaust temperature so as to judge whether the air conditioner stably runs to the target exhaust temperature or not.
Further, in one embodiment, whether the air conditioner is stably operated to the preset target exhaust temperature may be determined in other manners. For example, a plurality of real-time exhaust temperatures in a preset time period may be acquired, and it may be determined whether absolute values of temperature differences between each of the real-time exhaust temperatures and a preset target exhaust temperature in the plurality of real-time exhaust temperatures in the preset time period are less than a preset temperature difference. And under the condition that the absolute values of the temperature differences are smaller than the preset temperature difference, the air conditioner can be determined to stably operate to the target exhaust temperature.
Further, in one embodiment, adjusting the electronic expansion valve according to the preset target exhaust temperature so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature may include: acquiring the actual exhaust temperature of the air conditioner, the time corresponding to the actual exhaust temperature and the valve step of the electronic expansion valve; determining whether the actual exhaust temperature is equal to a preset target exhaust temperature; taking time corresponding to the actual exhaust temperature as characteristic time under the condition that the actual exhaust temperature is equal to the preset target exhaust temperature; determining a maximum actual exhaust temperature, a minimum actual exhaust temperature, a maximum valve step and a minimum valve step in a time period between the two characteristic times; determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step; and adjusting the electronic expansion valve according to the preset target exhaust temperature and the valve step range of the electronic expansion valve, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
Specifically, the valve step range of the electronic expansion valve can be corrected in real time in the process of adjusting the electronic expansion valve according to the preset target exhaust temperature. The actual exhaust temperature of the air conditioner is usually oscillated periodically, and the valve step range of the next period can be adjusted according to the exhaust temperature and the valve step range of the current period.
The actual exhaust temperature of the air conditioner, the corresponding time and the valve step of the electronic expansion valve can be obtained in real time. For example, the discharge temperature of the air conditioner may be acquired every 2 to 10 seconds, and the corresponding time and electronic expansion valve step may be recorded. It may be determined in real time whether the actual exhaust temperature of the air conditioner is equal to the preset target exhaust temperature. And under the condition that the actual exhaust temperature of the air conditioner is determined to be equal to the preset target exhaust temperature, taking the time corresponding to the actual exhaust temperature as the characteristic time. A maximum actual exhaust temperature, a minimum actual exhaust temperature, a maximum valve step, and a minimum valve step in a time period between the two characteristic times are determined. One of the two feature times may be a current time, and one feature time exists between the other feature time and the current time. For example, the first feature time may be denoted as t1, the second feature time may be denoted as t2, and the third feature time may be denoted as t 3. The maximum actual exhaust temperature, the minimum actual exhaust temperature, the maximum valve step, and the minimum valve step during the time periods t1 and t3 are determined. Then, the valve step range of the electronic expansion valve at the next time (for example, the next time at t 3) may be determined according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the maximum valve step, the minimum valve step, and the preset exhaust temperature. And then, adjusting the valve step of the electronic expansion valve according to the determined valve step range and the preset target exhaust temperature, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
In the above embodiment, in the process of adjusting the expansion valve to stabilize the actual exhaust temperature of the air conditioner to the preset target exhaust temperature, the range of the next period is adjusted according to the maximum valve step, the minimum valve step, the maximum actual exhaust temperature, the minimum actual exhaust temperature and the preset target exhaust temperature in the period, so that the response of the electronic expansion valve can be accelerated, and the valve step oscillation fluctuation in a large range is effectively avoided, so that the air conditioner can stably operate to the preset target exhaust temperature as soon as possible.
Further, in one embodiment, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step may include:
determining the valve step range of the electronic expansion valve as follows:
Figure BDA0002683806870000101
wherein, TPre-arrangingTo preset a target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxTo maximum actual exhaust temperature, BmaxTo the maximum valve step, BminK is the correction parameter for the minimum valve step.
The correction parameter K can be selected according to experiments. Illustratively, the correction parameter K may take the value 0.5-0.8. For example, the correction parameter may be 0.5, 0.6, 0.7, or 0.8, etc. In the above embodiment, the minimum valve step and the maximum valve step of the next cycle are corrected according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step of the previous cycle, and the valve step range of the electronic expansion valve is corrected, so that the valve step range of the electronic expansion valve can be limited, the response of the electronic expansion valve can be accelerated, and the valve step oscillation in a large range can be avoided.
Further, in one embodiment, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step may include:
determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step satisfy a first inequality, wherein the first inequality includes:
Figure BDA0002683806870000111
and under the condition of meeting the first inequality, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step.
Wherein, TPre-arrangingTo the preset target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxIs the maximum actual exhaust temperature, BmaxFor said maximum valve step, BminAnd K is a correction parameter for the minimum valve step.
Specifically, the difference between the maximum value and the minimum value in the valve step range of the electronic expansion valve at the next time may be defined to be greater than the preset value. Wherein the preset value may be set to 5 to 10. For example, the preset value may be 5, 8, 10. In the embodiment, the difference value between the maximum value and the minimum value in the valve step range at the next moment is limited to be larger than the preset value, so that valve death caused by the existence of a flow rate catastrophe point of the electronic expansion valve can be effectively avoided, and the air conditioner can stably run to the preset target exhaust temperature as soon as possible.
Further, in one embodiment, after determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step satisfy the first inequality, the method may further include: in the case where the first inequality is not satisfied, the valve step range of the electronic expansion valve is determined as:
[Bmin，Bmax]；
wherein, BmaxFor said maximum valve step, BminIs the minimum valve step.
Specifically, in the case that the first inequality is not satisfied, the valve step range correction is not performed, that is, the range between the maximum valve step and the minimum valve step of the present cycle is determined as the valve step range of the electronic expansion valve of the next time or the next cycle, that is, the electronic expansion valve is still adjusted according to the valve step range of the current cycle. By the mode, valve deadlocking caused by the fact that the electronic expansion valve has a flow rate abrupt change point can be avoided.
Referring to fig. 2, a flow chart of an electronic expansion valve control method in an embodiment of the present application is shown. As shown in fig. 2, the control method may include the steps of:
step S201, starting an air conditioner, and starting a compressor;
step S202, acquiring the real-time running frequency of the compressor;
step S203, determining whether the real-time running frequency of the compressor is equal to a preset target frequency, if so, executing step S211, otherwise, executing step S204;
step S204, acquiring the current working condition temperature T;
step S205, determining whether the current working condition temperature T is lower than a first preset temperature T1, if so, executing step S207, otherwise, executing step S206;
step S206, determining whether the current working condition temperature is higher than a second preset temperature T2, if so, executing step S209, otherwise, executing step S208;
step S207, setting the target exhaust temperatureThe range is determined as [ TPre-arranging，TPre-arranging+a]Executing step S210, wherein a can be 5-10 ℃;
step S208, determining the target exhaust temperature range to be equal to TPre-arrangingExecuting step S210;
in step S209, the target exhaust temperature range is determined as [ TPre-arranging-b，TPre-arranging]Step S210 is executed, wherein b can be 5 ℃ to 10 ℃;
step S210, adjusting the electronic expansion valve based on the target exhaust temperature range to enable the actual exhaust temperature to be in the target exhaust range, and returning to the step S203;
step S211, adjusting the electronic expansion valve according to the preset target exhaust temperature, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
According to the control method of the electronic expansion valve in the embodiment, after the compressor is started and the compressor does not operate to the target frequency, the target exhaust temperature range is set according to the preset target exhaust temperature and the current working condition temperature, and the electronic expansion valve is adjusted to enable the actual exhaust temperature of the air conditioner to be within the target exhaust temperature range, so that the electronic expansion valve can be prevented from being over-adjusted under the high-temperature working condition and the low-temperature working condition, the response of the electronic expansion valve can be accelerated, the air conditioner can be stabilized as soon as possible after being started, and the stable operation of the whole machine is guaranteed.
Referring to fig. 3, a flowchart of step S211 in the electronic expansion valve control method shown in fig. 2 is shown. As shown in fig. 3, adjusting the electronic expansion valve according to the preset target exhaust temperature so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature may include the steps of:
step S301, acquiring actual exhaust temperature T of the air conditioner in real timeRow boardAnd corresponding time t and corresponding valve step B;
step S302, judging the actual exhaust temperature TRow boardWhether or not it is equal to the preset target exhaust temperature TPre-arrangingIf yes, executing step S303, otherwise returning to step S301;
step S303, n + +, recording the current time t as tnWherein n isIs 0, and calculates the actual exhaust temperature at the previous time and the actual exhaust temperature T at the present timeRow boardThe absolute value of the temperature difference between delta T and delta T;
step S304, judging whether the delta T is more than or equal to 0.2 ℃, if so, executing step S305, otherwise, executing step S310;
step S305, determining tn-2To tnMaximum valve step B in time periodmaxMinimum valve step BminMaximum exhaust temperature TmaxAnd minimum exhaust temperature Tmin；
Step S306, determining a preset target exhaust temperature TPre-arrangingMaximum valve step BmaxMinimum valve step BminMaximum exhaust temperature TmaxAnd minimum exhaust temperature TminIf the first inequality condition is satisfied, if yes, step S307 is executed, otherwise, step S308 is executed, where the first inequality condition may be:
Figure BDA0002683806870000131
wherein K is a correction parameter;
step S307, the valve step range is corrected, and step S309 is executed, in which the valve step range is corrected to:
Figure BDA0002683806870000132
step S308, not correcting the valve step range, executing step S309, wherein the valve step range is still [ Bmin，Bmax]；
Step S309, adjusting the electronic expansion valve according to the valve step range and the preset target exhaust temperature, and returning to the step S301;
step S310, judging whether t is satisfiedn-t1>5min, wherein, tnIs the current time, i.e. the time corresponding to the nth time actual exhaust temperature being equal to the preset target exhaust temperature, t1When the 1 st actual exhaust temperature is equal to the preset target exhaust temperatureOtherwise, step S311 is executed, otherwise, step S301 is returned to.
In step S311, it is determined that the air conditioner has stably operated to the preset target exhaust temperature.
In the above embodiment, whether the air conditioner stably operates to the target exhaust temperature is determined by obtaining the actual exhaust temperature of the air conditioner and determining whether the absolute values of the temperature difference within the preset time period are all smaller than the preset temperature difference under the condition that the actual exhaust temperature is equal to the preset target exhaust temperature, so that whether the air conditioner operates to the stable state can be effectively determined. Furthermore, under the condition that the air conditioner does not stably operate to the target exhaust, the range of the next period can be adjusted according to the maximum valve step, the minimum valve step, the maximum actual exhaust temperature, the minimum actual exhaust temperature and the preset target exhaust temperature in the period, the response of the electronic expansion valve can be accelerated, the valve step oscillation fluctuation in a large range is effectively avoided, and therefore the air conditioner can stably operate to the preset target exhaust temperature as soon as possible. In addition, the difference value between the maximum value and the minimum value in the valve step range is limited to be larger than the preset value, so that valve deadlocking caused by the existence of a flow rate catastrophe point of the electronic expansion valve can be effectively avoided, and the air conditioner can stably run to the preset target exhaust temperature as soon as possible.
Based on the same inventive concept, an electronic expansion valve control device is also provided in the embodiments of the present invention, as described in the following embodiments. The principle of the electronic expansion valve control device for solving the problems is similar to that of the electronic expansion valve control method, so the implementation of the electronic expansion valve control device can refer to the implementation of the electronic expansion valve control method, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated. Fig. 4 is a block diagram showing a configuration of an electronic expansion valve control apparatus according to an embodiment of the present invention, as shown in fig. 4, including: a first determining module 401, an obtaining module 402, a second determining module 403, and an adjusting module 404, and the structure will be described below.
The first determining module 401 is configured to, when the compressor is started when the air conditioner is turned on, obtain a real-time operating frequency of the compressor, and determine whether the real-time operating frequency of the compressor is equal to a preset target frequency.
The obtaining module 402 is configured to obtain a current operating condition temperature when it is determined that the real-time operating frequency is not equal to the preset target frequency.
The second determining module 403 is configured to determine a target exhaust temperature range according to a preset target exhaust temperature and a current operating condition temperature.
The adjustment module 404 is configured to adjust an electronic expansion valve of the air conditioner based on the target exhaust temperature range such that an actual exhaust temperature of the air conditioner is within the target exhaust temperature range.
In one embodiment, the second determining module may be specifically configured to: determining whether the current working condition temperature is lower than a first preset temperature; in the event that it is determined that the current operating condition temperature is less than a first preset temperature, the target exhaust temperature range is determined to be between a preset target exhaust temperature and a first exhaust temperature, wherein the first exhaust temperature is higher than the preset target exhaust temperature.
In an embodiment, the second determining module may be further specifically configured to: after determining whether the current working condition temperature is lower than a first preset temperature, determining whether the current working condition temperature is higher than a second preset temperature under the condition that the current working condition temperature is not lower than the first preset temperature, wherein the second preset temperature is higher than the first preset temperature; and under the condition that the current working condition temperature is determined to be higher than a second preset temperature, determining the target exhaust temperature range to be between the second exhaust temperature and the preset target exhaust temperature, wherein the second exhaust temperature is lower than the preset target exhaust temperature.
In an embodiment, the second determining module may be further specifically configured to: after determining whether the current operating condition temperature is greater than the second preset temperature, determining the target exhaust temperature range to be equal to the preset target exhaust temperature if it is determined that the current operating condition temperature is not greater than the second preset temperature.
In one embodiment, the apparatus further includes a stability control module, and the stability control module may be specifically configured to: and under the condition that the first determining module determines that the real-time running frequency of the compressor is equal to the preset target frequency, the electronic expansion valve is adjusted according to the preset target exhaust temperature, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
In one embodiment, adjusting the electronic expansion valve according to the preset target exhaust temperature so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature comprises: repeating the following steps until the absolute value of the temperature difference in the preset time period is less than the preset temperature difference: acquiring the actual exhaust temperature of the air conditioner at the current moment; determining whether the actual exhaust temperature at the current moment is equal to a preset target exhaust temperature; under the condition that the actual exhaust temperature at the current moment is determined to be equal to the preset target exhaust temperature, acquiring the actual exhaust temperature of the air conditioner at the previous moment; and calculating the absolute value of the temperature difference between the actual exhaust temperature at the current moment and the actual exhaust temperature at the previous moment.
In one embodiment, adjusting the electronic expansion valve according to the preset target exhaust temperature so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature comprises: acquiring the actual exhaust temperature of the air conditioner, the time corresponding to the actual exhaust temperature and the valve step of the electronic expansion valve; determining whether the actual exhaust temperature is equal to a preset target exhaust temperature; taking time corresponding to the actual exhaust temperature as characteristic time under the condition that the actual exhaust temperature is equal to the preset target exhaust temperature; determining a maximum actual exhaust temperature, a minimum actual exhaust temperature, a maximum valve step and a minimum valve step in a time period between the two characteristic times; determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step; and adjusting the electronic expansion valve according to the preset target exhaust temperature and the valve step range of the electronic expansion valve, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
In one embodiment, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step comprises:
determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step satisfy a first inequality, wherein the first inequality includes:
Figure BDA0002683806870000161
wherein, TPre-arrangingTo the preset target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxIs the maximum actual exhaust temperature, BmaxFor said maximum valve step, BminK is a correction parameter for the minimum valve step;
and under the condition of meeting the first inequality, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step.
In one embodiment, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step comprises: determining the valve step range of the electronic expansion valve as follows:
Figure BDA0002683806870000162
wherein, TPre-arrangingTo preset a target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxTo maximum actual exhaust temperature, BmaxTo the maximum valve step, BminK is the correction parameter for the minimum valve step.
In one embodiment, after determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step satisfy the first inequality, further comprising: in the case where the first inequality is not satisfied, the valve step range of the electronic expansion valve is determined as:
[Bmin，Bmax]；
wherein, BmaxTo the maximum valve step, BminThe minimum valve step.
Embodiments of the present invention further provide an air conditioner, which may include the electronic expansion valve control device in any of the above embodiments.
Embodiments of the present invention further provide software, where the software is configured to execute the steps of the electronic expansion valve control method described in any of the above embodiments.
An embodiment of the present invention further provides a non-volatile computer-readable storage medium, where the software is stored in the storage medium, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
An embodiment of the present invention further provides a computer device, where the computer device includes: a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method for controlling an electronic expansion valve as described in any of the above embodiments are implemented when the computer program is executed by the processor.
From the above description, it can be seen that the embodiments of the present invention achieve the following technical effects: after the air conditioner is started and the compressor is not operated to the target frequency, the target exhaust temperature range is set according to the preset target exhaust temperature and the current working condition temperature, and the electronic expansion valve is adjusted, so that the actual exhaust temperature of the air conditioner is in the target exhaust temperature range, the electronic expansion valve can be prevented from being over-adjusted under severe working conditions, the response of the electronic expansion valve can be accelerated, the air conditioner can be stable as soon as possible after being started, and the stable operation of the whole machine is guaranteed.
Although various specific embodiments are mentioned in the disclosure of the present application, the present application is not limited to the cases described in the industry standards or the examples, and the like, and some industry standards or the embodiments slightly modified based on the implementation described in the custom manner or the examples can also achieve the same, equivalent or similar, or the expected implementation effects after the modifications. Embodiments employing such modified or transformed data acquisition, processing, output, determination, etc., may still fall within the scope of alternative embodiments of the present application.
Although the present application provides method steps as described in an embodiment or flowchart, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or client product in practice executes, it may execute sequentially or in parallel (e.g., in a parallel processor or multithreaded processing environment, or even in a distributed data processing environment) according to the embodiments or methods shown in the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.
The devices or modules and the like explained in the above embodiments may be specifically implemented by a computer chip or an entity, or implemented by a product with certain functions. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the present application, the functions of each module may be implemented in one or more pieces of software and/or hardware, or a module that implements the same function may be implemented by a combination of a plurality of sub-modules, and the like. The above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
While the present application has been described by way of examples, those of ordinary skill in the art will appreciate that there are numerous variations and permutations of the present application that do not depart from the spirit of the present application and that the appended embodiments are intended to include such variations and permutations without departing from the present application.

Claims (14)

1. An electronic expansion valve control method, comprising:
under the condition that a compressor is started when an air conditioner is started, acquiring the real-time running frequency of the compressor, and determining whether the real-time running frequency of the compressor is equal to a preset target frequency or not;
under the condition that the real-time running frequency is determined not to be equal to the preset target frequency, acquiring the current working condition temperature;
determining a target exhaust temperature range according to a preset target exhaust temperature and the current working condition temperature;
and adjusting an electronic expansion valve of the air conditioner based on the target exhaust temperature range so that the actual exhaust temperature of the air conditioner is within the target exhaust temperature range.
2. The method of claim 1, wherein determining a target exhaust temperature range based on a preset target exhaust temperature and the current operating condition temperature comprises:
determining whether the current working condition temperature is lower than a first preset temperature;
determining a target exhaust temperature range to be between the preset target exhaust temperature and a first exhaust temperature, wherein the first exhaust temperature is higher than the preset target exhaust temperature, in the case that the current operating condition temperature is determined to be lower than a first preset temperature.
3. The method of claim 2, after determining whether the current operating condition temperature is less than a first preset temperature, further comprising:
under the condition that the current working condition temperature is not lower than a first preset temperature, determining whether the current working condition temperature is higher than a second preset temperature or not, wherein the second preset temperature is higher than the first preset temperature;
under the condition that the current working condition temperature is determined to be higher than the second preset temperature, determining a target exhaust temperature range to be between the second exhaust temperature and the preset target exhaust temperature, wherein the second exhaust temperature is lower than the preset target exhaust temperature.
4. The method of claim 3, after determining whether the current operating condition temperature is greater than a second preset temperature, further comprising:
and under the condition that the current working condition temperature is not higher than a second preset temperature, determining a target exhaust temperature range as equal to the preset target exhaust temperature.
5. The method of claim 1, after determining whether the real-time operating frequency of the compressor is equal to the preset target frequency, further comprising:
and under the condition that the real-time operation frequency of the compressor is determined to be equal to the preset target frequency, adjusting the electronic expansion valve according to the preset target exhaust temperature, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
6. The method of claim 5, wherein adjusting the electronic expansion valve according to the preset target exhaust temperature such that an actual exhaust temperature of an air conditioner stabilizes to the preset target exhaust temperature comprises:
repeating the following steps until the absolute value of the temperature difference in the preset time period is less than the preset temperature difference:
acquiring the actual exhaust temperature of the air conditioner at the current moment;
determining whether the actual exhaust temperature at the current moment is equal to a preset target exhaust temperature;
under the condition that the actual exhaust temperature at the current moment is determined to be equal to the preset target exhaust temperature, acquiring the actual exhaust temperature of the air conditioner at the previous moment;
and calculating the absolute value of the temperature difference between the actual exhaust temperature at the current moment and the actual exhaust temperature at the previous moment.
7. The method of claim 5, wherein adjusting the electronic expansion valve according to the preset target exhaust temperature such that an actual exhaust temperature of an air conditioner stabilizes to the preset target exhaust temperature comprises:
acquiring the actual exhaust temperature of an air conditioner, the time corresponding to the actual exhaust temperature and the valve step of an electronic expansion valve;
determining whether the actual exhaust temperature is equal to a preset target exhaust temperature;
taking time corresponding to the actual exhaust temperature as characteristic time under the condition that the actual exhaust temperature is determined to be equal to a preset target exhaust temperature;
determining a maximum actual exhaust temperature, a minimum actual exhaust temperature, a maximum valve step and a minimum valve step in a time period between the two characteristic times;
determining a valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step;
and adjusting the electronic expansion valve according to the preset target exhaust temperature and the valve step range of the electronic expansion valve, so that the actual exhaust temperature of the air conditioner is stabilized to the preset target exhaust temperature.
8. The method of claim 7, wherein determining a valve step range of an electronic expansion valve based on the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step comprises:
determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step satisfy a first inequality, wherein the first inequality includes:
Figure FDA0002683806860000031
wherein, TPre-arrangingTo the preset target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxIs the maximum actual exhaust temperature, BmaxFor said maximum valve step, BminK is a correction parameter for the minimum valve step;
and under the condition of meeting the first inequality, determining the valve step range of the electronic expansion valve according to the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step and the minimum valve step.
9. The method of claim 7 or 8, wherein determining a valve step range of an electronic expansion valve based on the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step comprises:
determining the valve step range of the electronic expansion valve as follows:
Figure FDA0002683806860000032
wherein, TPre-arrangingTo the preset target exhaust temperature, TminIs the minimum actual exhaust temperature, TmaxIs the maximum actual exhaust temperature, BmaxFor said maximum valve step, BminAnd K is a correction parameter for the minimum valve step.
10. The method of claim 8, further comprising, after determining whether the maximum actual exhaust temperature, the minimum actual exhaust temperature, the preset target exhaust temperature, the maximum valve step, and the minimum valve step satisfy a first inequality:
in the case where the first inequality is not satisfied, the valve step range of the electronic expansion valve is determined as:
[Bmin，Bmax]；
wherein, BmaxFor said maximum valve step, BminIs the minimum valve step.
11. An electronic expansion valve control apparatus, comprising:
the first determining module is used for acquiring the real-time running frequency of the compressor under the condition that the compressor is started when the air conditioner is started, and determining whether the real-time running frequency of the compressor is equal to a preset target frequency or not;
the acquisition module is used for acquiring the current working condition temperature under the condition that the real-time running frequency is determined not to be equal to the preset target frequency;
the second determining module is used for determining a target exhaust temperature range according to a preset target exhaust temperature and the current working condition temperature;
and the adjusting module is used for adjusting an electronic expansion valve of the air conditioner based on the target exhaust temperature range, so that the actual exhaust temperature of the air conditioner is in the target exhaust temperature range.
12. An air conditioner, comprising: the electronic expansion valve control apparatus of claim 11.
13. A computer device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 10 when executing the computer program.
14. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the method of any one of claims 1 to 10.
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