CN109059226B - Control method of electronic expansion valve, air conditioner and computer readable storage medium - Google Patents
Control method of electronic expansion valve, air conditioner and computer readable storage medium Download PDFInfo
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- CN109059226B CN109059226B CN201810750819.8A CN201810750819A CN109059226B CN 109059226 B CN109059226 B CN 109059226B CN 201810750819 A CN201810750819 A CN 201810750819A CN 109059226 B CN109059226 B CN 109059226B
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Abstract
The invention discloses a control method of an electronic expansion valve, which comprises the following steps: when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches a first preset duration, acquiring the maximum exhaust temperature of a compressor of the air conditioner within the first preset duration; acquiring the current exhaust temperature of the compressor every second preset time; and when the current exhaust temperature is acquired every time, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner based on the maximum exhaust temperature and the current exhaust temperature. The invention also discloses an air conditioner and a computer readable storage medium. The invention realizes the timing adjustment of the opening of the electronic expansion valve according to the current exhaust temperature, can improve the low-temperature heating effect of the room air conditioner according to the exhaust temperature of the compressor, and improves the heating capacity output of the air conditioner, thereby improving the room heating comfort and improving the user experience.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a method for controlling an electronic expansion valve, an air conditioner, and a computer-readable storage medium.
Background
At present, when an air conditioner is operated in a low-temperature environment for heating, frosting may occur outside the air conditioner, so that the operation state of the air conditioner is in an unsteady state process. If the electronic expansion valve aperture of the air conditioner is fixed at the set aperture, the exhaust temperature of the compressor is rapidly reduced along with the time, so that the outlet air temperature of the air conditioner is reduced, the heating performance of the air conditioner is unstable, the thermal comfort of a room is further influenced, and troubles are caused for the use of a user.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a control method of an electronic expansion valve, an air conditioner and a computer readable storage medium, and aims to solve the technical problem that the thermal comfort of a room is influenced by the reduction of exhaust temperature in the later stage of low-temperature heating operation of the existing air conditioner.
In order to achieve the above object, the present invention provides a control method of an electronic expansion valve, including the steps of:
when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches a first preset duration, acquiring the maximum exhaust temperature of a compressor of the air conditioner within the first preset duration;
acquiring the current exhaust temperature of the compressor every second preset time;
and when the current exhaust temperature is acquired every time, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner based on the maximum exhaust temperature and the current exhaust temperature.
In one embodiment, the step of adjusting the opening degree of the electronic expansion valve based on the maximum exhaust temperature and the current exhaust temperature each time the current exhaust temperature is obtained includes:
calculating the temperature amplitude between the maximum exhaust temperature and the current exhaust temperature when the current exhaust temperature is obtained each time;
acquiring the current opening degree of the electronic expansion valve;
and adjusting the opening degree of the electronic expansion valve based on the temperature amplitude and the current opening degree.
In one embodiment, the step of adjusting the opening degree of the electronic expansion valve based on the temperature magnitude and the current opening degree comprises:
determining an opening correction coefficient based on a mapping relation between a preset amplitude interval in which the temperature amplitude is located and a preset opening correction coefficient;
and adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree.
In an embodiment, the step of determining the opening degree correction coefficient based on the preset amplitude interval in which the temperature amplitude is located includes:
when the preset amplitude interval in which the temperature amplitude is located is a first preset amplitude interval, determining the opening correction coefficient as a first correction coefficient;
when the preset amplitude interval in which the temperature amplitude is located is a second preset amplitude interval, determining the opening correction coefficient as a second correction coefficient;
when the preset amplitude interval in which the temperature amplitude is located is a third preset amplitude interval, determining that the opening correction coefficient is a third correction coefficient;
when the preset amplitude interval in which the temperature amplitude is located is a fourth preset amplitude interval, determining that the opening correction coefficient is a fourth correction coefficient;
the first preset amplitude interval, the second preset amplitude interval, the third preset amplitude interval and the fourth preset amplitude interval are sequentially reduced, and the first correction coefficient, the second correction coefficient, the third correction coefficient and the fourth correction coefficient are sequentially increased.
In one embodiment, the step of adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree comprises:
and calculating a first target opening degree based on the opening degree correction coefficient and the current opening degree, and adjusting the opening degree of the electronic expansion valve to the first target opening degree.
In one embodiment, the adjusting the opening degree of the electronic expansion valve to the first target opening degree includes:
acquiring the minimum opening degree of the electronic expansion valve in a heating mode;
determining whether the first target opening degree is greater than the minimum opening degree;
and when the first target opening degree is larger than the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the first target opening degree.
In one embodiment, after the step of determining whether the first target opening degree is greater than the minimum opening degree, the method further includes:
and when the first target opening degree is smaller than or equal to the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the minimum opening degree.
In one embodiment, the first predetermined period of time ranges from 2 minutes to 7 minutes, and the second predetermined period of time ranges from 2 minutes to 5 minutes.
In an embodiment, the step of obtaining the maximum exhaust temperature of the compressor of the air conditioner within a first preset time when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches the first preset time includes:
when the air conditioner is in a heating mode, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner to a second target opening degree;
and when the time for maintaining the second target opening degree of the electronic expansion valve reaches a first preset time, acquiring the maximum exhaust temperature of the compressor of the air conditioner within the first preset time.
In one embodiment, the step of adjusting the opening degree of the electronic expansion valve corresponding to the air conditioner to a second target opening degree when the air conditioner is in the heating mode includes:
when the air conditioner is in a heating mode, acquiring the operating frequency of the compressor, and determining a second target opening degree based on the operating frequency;
and adjusting the opening degree of the electronic expansion valve to the second target opening degree.
In addition, to achieve the above object, the present invention also provides an air conditioner, comprising: a memory, a processor and a control program for an electronic expansion valve stored on the memory and operable on the processor, the control program for the electronic expansion valve when executed by the processor implementing the steps of the control method for an electronic expansion valve as set forth in any one of the preceding claims.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium having a control program of the electronic expansion valve stored thereon, the control program of the electronic expansion valve being executed by a processor to implement the steps of the control method of the electronic expansion valve according to any one of the above.
The invention realizes the timing adjustment of the opening degree of the electronic expansion valve according to the current exhaust temperature by acquiring the maximum exhaust temperature of the compressor of the air conditioner within a first preset time when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches the first preset time, then acquiring the current exhaust temperature of the compressor at intervals of a second preset time, and then adjusting the opening degree of the electronic expansion valve corresponding to the air conditioner based on the maximum exhaust temperature and the current exhaust temperature each time when the current exhaust temperature is acquired, thereby avoiding the situation that the air outlet temperature of the air conditioner is reduced because the opening degree of the electronic expansion valve is fixed when the air conditioner is in low-temperature heating operation, improving the low-temperature heating effect of the room air conditioner at regular time according to the exhaust temperature of the compressor, and improving the heating capacity output of the air conditioner, thereby improving the heating comfort of the room and improving the user experience.
Drawings
FIG. 1 is a schematic diagram of an air conditioner in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram of a first embodiment of a control method for an electronic expansion valve of the present invention;
fig. 3 is a detailed flowchart of a step of adjusting the opening degree of the electronic expansion valve based on the maximum exhaust temperature and the current exhaust temperature each time the current exhaust temperature is obtained according to the control method of an electronic expansion valve of the present invention;
fig. 4 is a schematic flowchart of a detailed process of the step of adjusting the opening degree of the electronic expansion valve based on the temperature amplitude and the current opening degree in the third embodiment of the control method of the electronic expansion valve according to the present invention;
fig. 5 is a detailed flowchart of the step of adjusting the opening degree of the electronic expansion valve to the first target opening degree in the fourth embodiment of the control method of an electronic expansion valve according to the present invention;
fig. 6 is a detailed flowchart of the step of obtaining the maximum discharge temperature of the compressor of the air conditioner within a first preset time period when the air conditioner is in the heating mode and the duration of maintaining the heating mode reaches the first preset time period in the control method of the electronic expansion valve according to the fifth embodiment of the present invention;
fig. 7 is a detailed flowchart of a step of adjusting the opening degree of the electronic expansion valve corresponding to the air conditioner to a second target opening degree when the air conditioner is in the heating mode according to the control method of the electronic expansion valve of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
This application is according to the biggest exhaust temperature of compressor and current exhaust temperature regularly adjust electronic expansion valve's aperture for electronic expansion valve aperture is adjusted more rationally, and when the air conditioner was operated for a long time, can avoid the exhaust temperature of compressor to reduce rapidly and cause the condition that the air-out temperature of air conditioner reduces, improves the stability of air conditioner heating performance, and then improves the thermal comfort in room.
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.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an air conditioner in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the air conditioner may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the air conditioner may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Of course, the air conditioner may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described herein again.
Those skilled in the art will appreciate that the air conditioner configuration shown in fig. 1 is not intended to be limiting of the air conditioner and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a control program of the electronic expansion valve.
In the air conditioner shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be used to invoke a control program for the electronic expansion valves stored in the memory 1005.
In the present embodiment, an air conditioner includes: a memory 1005, a processor 1001, and a control program of the electronic expansion valve stored in the memory 1005 and operable on the processor 1001, wherein when the processor 1001 calls the control program of the electronic expansion valve stored in the memory 1005, the following operations are performed:
when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches a first preset duration, acquiring the maximum exhaust temperature of a compressor of the air conditioner within the first preset duration;
acquiring the current exhaust temperature of the compressor every second preset time;
and when the current exhaust temperature is acquired every time, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner based on the maximum exhaust temperature and the current exhaust temperature.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
calculating the temperature amplitude between the maximum exhaust temperature and the current exhaust temperature when the current exhaust temperature is obtained each time;
acquiring the current opening degree of the electronic expansion valve;
and adjusting the opening degree of the electronic expansion valve based on the temperature amplitude and the current opening degree.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
determining an opening correction coefficient based on a mapping relation between a preset amplitude interval in which the temperature amplitude is located and a preset opening correction coefficient;
and adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
and calculating a first target opening degree based on the opening degree correction coefficient and the current opening degree, and adjusting the opening degree of the electronic expansion valve to the first target opening degree.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
acquiring the minimum opening degree of the electronic expansion valve in a heating mode;
determining whether the first target opening degree is greater than the minimum opening degree;
and when the first target opening degree is larger than the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the first target opening degree.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
and when the first target opening degree is smaller than or equal to the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the minimum opening degree.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
when the air conditioner is in a heating mode, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner to a second target opening degree;
and when the time for maintaining the second target opening degree of the electronic expansion valve reaches a first preset time, acquiring the maximum exhaust temperature of the compressor of the air conditioner within the first preset time.
Further, the processor 1001 may call a control program of the electronic expansion valve stored in the memory 1005, and also perform the following operations:
when the air conditioner is in a heating mode, acquiring the operating frequency of the compressor, and determining a second target opening degree based on the operating frequency;
and adjusting the opening degree of the electronic expansion valve to the second target opening degree.
The invention also provides a control method of the electronic expansion valve, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the control method of the electronic expansion valve.
The control method of the electronic expansion valve comprises the following steps:
step S100, when an air conditioner is in a heating mode and the duration of maintaining the heating mode reaches a first preset duration, acquiring the maximum exhaust temperature of a compressor of the air conditioner within the first preset duration;
in this embodiment, the air conditioner may be a heat pump type room air conditioner, and when the air conditioner starts heating, the duration of heating operation of the air conditioner is accumulated, that is, the duration of the air conditioner maintaining the heating mode is monitored in real time, and if the duration reaches a first preset duration, the maximum exhaust temperature among the exhaust temperatures of the compressor within the first preset duration is obtained.
The first preset time period may be set reasonably, for example, the range of the first preset time period is 2 minutes to 7 minutes, and specifically, the first preset time period may be set to 5 minutes, and the like, which is not limited herein.
Generally, when the air conditioner starts heating, the electronic expansion valve of the air conditioner is adjusted to a certain fixed opening degree, and therefore, the duration time can be an operation time period for maintaining the fixed opening degree of the electronic expansion valve. The electronic expansion valve is arranged in a refrigerant system between an outdoor unit and an indoor unit of the air conditioner and used for controlling the refrigerant flow of the refrigerant system between the indoor unit and the outdoor unit.
Step S200, acquiring the current exhaust temperature of the compressor every second preset time;
in this embodiment, when the maximum exhaust temperature is obtained, the current exhaust temperature of the compressor is obtained at regular time, that is, the current exhaust temperature of the compressor is obtained every second preset time.
The second preset time period may be set reasonably, for example, the second preset time period ranges from 2 minutes to 5 minutes, specifically, the second preset time period may be set to 3 minutes, and the like, which is not limited herein
And step S300, when the current exhaust temperature is obtained each time, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner based on the maximum exhaust temperature and the current exhaust temperature.
In this embodiment, each time the current exhaust temperature is obtained, the opening degree of the electronic expansion valve is adjusted according to the maximum exhaust temperature and the current exhaust temperature, specifically, a temperature amplitude between the maximum exhaust temperature and the current exhaust temperature is calculated, an opening degree correction coefficient corresponding to the temperature amplitude is determined, and the opening degree of the electronic expansion valve is adjusted according to the opening degree correction coefficient and the current opening degree of the electronic expansion valve, so that the opening degree of the electronic expansion valve is adjusted at regular time according to the current exhaust temperature, and the situation that the outlet air temperature of the air conditioner is reduced due to the fixed opening degree of the electronic expansion valve when the air conditioner is in the low-temperature heating operation is avoided.
Through this embodiment, when the air conditioner is in low temperature and heats, for example when outdoor ambient temperature is less than 5 ℃, through regularly adjusting the aperture of electronic expansion valve, when the air conditioner was operated for a long time, can avoid the exhaust temperature of compressor to reduce rapidly and cause the condition that the air-out temperature of air conditioner reduces, improve the stability of air conditioner heating performance, and then improve the thermal comfort in room. It should be noted that, when the outdoor environment temperature corresponding to the air conditioner is higher than 5 ℃, the opening degree of the electronic expansion valve may also be adjusted at regular time in the above manner.
In the control method of the electronic expansion valve provided in this embodiment, when the air conditioner is in the heating mode and the duration of maintaining the heating mode reaches a first preset time, the maximum exhaust temperature of the compressor of the air conditioner within the first preset time is obtained, then the current exhaust temperature of the compressor is obtained every second preset time, and then each time the current exhaust temperature is obtained, the opening degree of the electronic expansion valve corresponding to the air conditioner is adjusted based on the maximum exhaust temperature and the current exhaust temperature, so that the opening degree of the electronic expansion valve is adjusted at regular time according to the current exhaust temperature, the situation that the outlet air temperature of the air conditioner is reduced due to the fixed opening degree of the electronic expansion valve when the air conditioner is in the low-temperature heating operation is avoided, and the low-temperature heating effect of the room air conditioner can be improved at regular time according to the exhaust temperature of the compressor, the output of the heating capacity of the air conditioner is improved, the room heating comfort is further improved, and the user experience is improved.
A second embodiment of the control method of an electronic expansion valve of the present invention is proposed based on the first embodiment, and referring to fig. 3, in the present embodiment, step S300 includes:
step S310, calculating a temperature amplitude between the maximum exhaust temperature and the current exhaust temperature each time the current exhaust temperature is obtained;
step S320, acquiring the current opening degree of the electronic expansion valve;
step S320, adjusting an opening degree of the electronic expansion valve based on the temperature amplitude and the current opening degree.
In this embodiment, each time a current exhaust temperature is obtained, a temperature amplitude between the maximum exhaust temperature and the current exhaust temperature is calculated, a current opening degree of the electronic expansion valve is obtained, and the opening degree of the electronic expansion valve is adjusted based on the temperature amplitude and the current opening degree.
For example, if the maximum exhaust temperature is TPmax and the current exhaust temperature is TPi, the temperature magnitude C may be calculated by:
C＝(TPmax-TPi)/TPmax*100％。
in the control method of the electronic expansion valve provided in this embodiment, when the current exhaust temperature is obtained each time, the temperature amplitude between the maximum exhaust temperature and the current exhaust temperature is calculated, then the current opening of the electronic expansion valve is obtained, and then the opening of the electronic expansion valve is adjusted based on the temperature amplitude and the current opening.
A third embodiment of the control method of an electronic expansion valve of the present invention is proposed based on the second embodiment, and referring to fig. 4, in the present embodiment, step S330 includes:
step S331, determining an opening correction coefficient based on a mapping relation between a preset amplitude interval where the temperature amplitude is located and a preset opening correction coefficient;
and step S332, adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree.
In this embodiment, when the temperature amplitude is obtained through calculation, the opening correction coefficient is determined based on a mapping relationship between a preset amplitude interval in which the temperature amplitude is located and the preset opening correction coefficient, specifically, the preset amplitude interval to which the temperature amplitude belongs is determined, the opening correction coefficient is determined based on the mapping relationship between the preset amplitude interval and the preset opening correction coefficient, and then the opening of the electronic expansion valve is adjusted according to the opening correction coefficient and the current opening, so that the accuracy of adjusting the opening of the electronic expansion valve is further improved.
It should be noted that a mapping relationship between a preset amplitude interval and a preset opening correction coefficient may be preset, that is, each preset amplitude interval corresponds to a preset opening correction coefficient, where the preset amplitude interval includes at least two amplitude intervals; and according to the sequence of the amplitude intervals from large to small, the preset opening correction coefficients corresponding to the amplitude intervals are increased in sequence.
For example, the preset amplitude interval includes a first preset amplitude interval, a second preset amplitude interval, a third preset amplitude interval and a fourth preset amplitude interval, and a first correction coefficient, a second correction coefficient, a third correction coefficient and a fourth correction coefficient which correspond to each preset amplitude interval in sequence, where the first preset amplitude interval, the second preset amplitude interval, the third preset amplitude interval and the fourth preset amplitude interval decrease in sequence, the first correction coefficient, the second correction coefficient, the third correction coefficient and the fourth correction coefficient increase in sequence, and preferably, a minimum value of the first preset amplitude interval is greater than a maximum value of the second preset amplitude interval; the minimum value of the second preset amplitude interval is larger than the maximum value of the third preset amplitude interval; the minimum value of the third preset amplitude interval is larger than the maximum value of the fourth preset amplitude interval.
The step S331 includes: when the preset amplitude interval in which the temperature amplitude is located is a first preset amplitude interval, determining the opening correction coefficient as a first correction coefficient; when the preset amplitude interval in which the temperature amplitude is located is a second preset amplitude interval, determining the opening correction coefficient as a second correction coefficient; when the preset amplitude interval in which the temperature amplitude is located is a third preset amplitude interval, determining that the opening correction coefficient is a third correction coefficient; and when the preset amplitude interval in which the temperature amplitude is located is a fourth preset amplitude interval, determining the opening correction coefficient as a fourth correction coefficient.
For example, the mapping relationship between the preset amplitude interval and the preset opening correction coefficient is shown in table 1 below.
TABLE 1, amplitude interval and opening correction coefficient mapping relationship table
| Amplitude interval (C) | Opening correction coefficient (r) |
| 10％>C≥5％ | 0.95 |
| 20％＞C≥10％ | 0.9 |
| 30％＞C≥20％ | 0.85 |
| C≥30％ | 0.8 |
As shown in table 1, the values of 10% > C > 5%, 20% > C > 10%, 30% > C > 20%, and C > 30% are sequentially a first preset amplitude interval, a second preset amplitude interval, a third preset amplitude interval, and a fourth preset amplitude interval, and corresponding values of 0.95, 0.9, 0.85, and 0.8 are a first correction coefficient, a second correction coefficient, a third correction coefficient, and a fourth correction coefficient, respectively. Wherein, if C < 5%, the opening correction coefficient may be set to 1.
In other embodiments, preset amplitude intervals and preset opening correction coefficients different from those in table 1 may be set according to requirements, for example, the range of each preset amplitude interval in table 1 may be reduced, that is, the number of the preset amplitude intervals is increased, and meanwhile, corresponding preset opening coefficients are set, the preset opening coefficients may be set in a decreasing manner with the same difference with reference to table 1, or in a decreasing manner with different differences, so as to make opening adjustment of the electronic expansion valve more fine, where the difference is a difference between the opening correction coefficients corresponding to two adjacent preset amplitude intervals.
Further, in an embodiment, the step S332 includes: and calculating a first target opening degree based on the opening degree correction coefficient and the current opening degree, and adjusting the opening degree of the electronic expansion valve to the first target opening degree.
In this embodiment, the first target opening degree may be calculated according to the opening degree correction coefficient and the current opening degree, and then the opening degree of the electronic expansion valve is adjusted to the first target opening degree, so that the opening degree of the electronic expansion valve is accurately adjusted, the heating capacity output of the air conditioner is improved, and the room heating comfort and the user experience are further improved.
The first target opening degree may be calculated by using P-P0 r, where r is an opening degree correction coefficient and P0 is a current opening degree. In other embodiments, the first target opening degree may be calculated by P0 r + a, where a is a constant. If the calculated first target opening degree is a decimal, the decimal may be rounded to obtain an integer first target opening degree.
According to the control method of the electronic expansion valve provided by the embodiment, the opening correction coefficient is determined based on the mapping relation between the preset amplitude interval where the temperature amplitude is located and the preset opening correction coefficient, then the opening of the electronic expansion valve is adjusted based on the opening correction coefficient and the current opening, so that the opening of the electronic expansion valve can be accurately determined according to the opening correction coefficient, the accurate adjustment of the opening of the electronic expansion valve is realized, the heating capacity output of an air conditioner is improved, and the room heating comfort and the user experience are further improved.
A fourth embodiment of the control method of an electronic expansion valve of the present invention is proposed based on the third embodiment, and referring to fig. 5, in the present embodiment, step S332 includes:
step S3321, acquiring the minimum opening degree of the electronic expansion valve in a heating mode;
step S3322 of determining whether the first target opening degree is greater than the minimum opening degree;
step S3323, when the first target opening degree is greater than the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the first target opening degree.
Generally, when the air conditioner operates, no matter the air conditioner operates in a heating operation or a cooling operation, the minimum opening degree of the electronic expansion valve is set so as to avoid the influence of the too small opening degree of the electronic expansion valve on the cooling or heating effect of the air conditioner.
In this embodiment, when the first target opening degree is obtained, the minimum opening degree of the electronic expansion valve in the heating mode is obtained, whether the first target opening degree is greater than the minimum opening degree is determined, and if the first target opening degree is greater than the minimum opening degree, the opening degree of the electronic expansion valve is adjusted to the first target opening degree.
Further, in an embodiment, after the step S3322, the method further includes: and when the first target opening degree is smaller than or equal to the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the minimum opening degree.
In this embodiment, if the first target opening degree is less than or equal to the minimum opening degree, that is, the first target opening degree is too small, the opening degree of the electronic expansion valve is adjusted to the minimum opening degree, so that the situation that the operation of the air conditioner is affected due to too small opening degree of the adjusted electronic expansion valve can be avoided, the heating capacity output of the air conditioner is further improved, and the room heating comfort and the user experience are further improved.
In the control method of the electronic expansion valve provided in this embodiment, by obtaining the minimum opening degree of the electronic expansion valve in the heating mode, then determining whether the first target opening degree is greater than the minimum opening degree, and then adjusting the opening degree of the electronic expansion valve to the first target opening degree when the first target opening degree is greater than the minimum opening degree, during the process of adjusting the electronic expansion valve, it is possible to avoid that the opening degree of the adjusted electronic expansion valve is too small, so as to improve the heating capacity output of the air conditioner, and further improve the room heating comfort and the user experience.
On the basis of the above embodiment, a fifth embodiment of the control method of an electronic expansion valve of the present invention is proposed, and referring to fig. 6, in this embodiment, step S100 includes:
step S110, when the air conditioner is in a heating mode, adjusting the opening degree of the electronic expansion valve to a second target opening degree;
and step S120, when the time for maintaining the second target opening degree of the electronic expansion valve reaches a first preset time, acquiring the maximum exhaust temperature of the compressor of the air conditioner within the first preset time.
In this embodiment, when the air conditioner is in the heating mode, that is, when the air conditioner starts to operate in the heating mode, the opening degree of the electronic expansion valve is adjusted to the second target opening degree, and when the duration for maintaining the second target opening degree of the electronic expansion valve reaches the first preset duration, the maximum exhaust temperature of the compressor of the air conditioner within the first preset duration is obtained, so that the air conditioner performs heating operation according to the second target opening degree, the efficiency of the heating operation of the air conditioner is ensured, the heating capacity output of the air conditioner is improved, and the room heating comfort is further improved.
The second target opening degree may be a fixed opening degree set during heating operation of the air conditioner, or may be determined according to a current operation frequency of a compressor of the air conditioner.
In the control method of the electronic expansion valve provided in this embodiment, when the air conditioner is in the heating mode, the opening degree of the electronic expansion valve corresponding to the air conditioner is adjusted to a second target opening degree, and then when the duration for maintaining the second target opening degree by the electronic expansion valve reaches a first preset duration, the maximum exhaust temperature of the compressor of the air conditioner within the first preset duration is obtained, so that the air conditioner performs heating operation according to the second target opening degree, the heating operation efficiency of the air conditioner is ensured, and the room heating comfort and the user experience are further improved.
A sixth embodiment of a control method of an electronic expansion valve of the present invention is proposed based on the fifth embodiment, and referring to fig. 7, in the present embodiment, step S110 includes:
step S111, when the air conditioner is in a heating mode, obtaining the operating frequency of the compressor, and determining a second target opening degree based on the operating frequency;
and step S112, adjusting the opening degree of the electronic expansion valve to the second target opening degree.
In this embodiment, when the air conditioner is in the heating mode, that is, when the air conditioner starts to operate in the heating mode, the operating frequency of the compressor is acquired, the second target opening degree is determined based on the acquired operating frequency, and then the opening degree of the electronic expansion valve is adjusted to the second target opening degree, so that the air conditioner performs heating operation according to the second target opening degree, the heating operation efficiency of the air conditioner is ensured, the heating capacity output of the air conditioner is improved, and the room heating comfort is further improved.
The second target opening degree is calculated as P0 ═ B × Fr + C, where P0 is the second target opening degree and Fr is the compressor operating frequency; b and C are correction coefficients corresponding to the second target opening degree.
In the control method of the electronic expansion valve provided in this embodiment, when the air conditioner is in the heating mode, the operating frequency of the compressor is acquired, the second target opening degree is determined based on the operating frequency, and then the opening degree of the electronic expansion valve is adjusted to the second target opening degree, so that the air conditioner performs heating operation according to the second target opening degree, the heating operation efficiency of the air conditioner is ensured, the heating capacity output of the air conditioner is improved, and the room heating comfort is further improved.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where a control program of an electronic expansion valve is stored on the computer-readable storage medium, and when executed by a processor, the control program of the electronic expansion valve implements the following operations:
when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches a first preset duration, acquiring the maximum exhaust temperature of a compressor of the air conditioner within the first preset duration;
acquiring the current exhaust temperature of the compressor every second preset time;
and when the current exhaust temperature is acquired every time, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner based on the maximum exhaust temperature and the current exhaust temperature.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
calculating the temperature amplitude between the maximum exhaust temperature and the current exhaust temperature when the current exhaust temperature is obtained each time;
acquiring the current opening degree of the electronic expansion valve;
and adjusting the opening degree of the electronic expansion valve based on the temperature amplitude and the current opening degree.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
determining an opening correction coefficient based on a mapping relation between a preset amplitude interval in which the temperature amplitude is located and a preset opening correction coefficient;
and adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
and calculating a first target opening degree based on the opening degree correction coefficient and the current opening degree, and adjusting the opening degree of the electronic expansion valve to the first target opening degree.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
acquiring the minimum opening degree of the electronic expansion valve in a heating mode;
determining whether the first target opening degree is greater than the minimum opening degree;
and when the first target opening degree is larger than the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the first target opening degree.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
and when the first target opening degree is smaller than or equal to the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the minimum opening degree.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
when the air conditioner is in a heating mode, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner to a second target opening degree;
and when the time for maintaining the second target opening degree of the electronic expansion valve reaches a first preset time, acquiring the maximum exhaust temperature of the compressor of the air conditioner within the first preset time.
Further, the control program of the electronic expansion valve is executed by the processor to realize the following operations:
when the air conditioner is in a heating mode, acquiring the operating frequency of the compressor, and determining a second target opening degree based on the operating frequency;
and adjusting the opening degree of the electronic expansion valve to the second target opening degree.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 invention may 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 preferred embodiments of the present invention 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 such alterations and modifications as fall within the scope of the invention.
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 invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A control method of an electronic expansion valve, characterized by comprising the steps of:
when the air conditioner is in a heating mode and the duration of maintaining the heating mode reaches a first preset duration, acquiring the maximum exhaust temperature of a compressor of the air conditioner within the first preset duration;
acquiring the current exhaust temperature of the compressor every second preset time;
calculating a temperature amplitude between the maximum exhaust temperature and the current exhaust temperature each time the current exhaust temperature is obtained;
acquiring the current opening degree of the electronic expansion valve;
determining an opening correction coefficient based on a mapping relation between a preset amplitude interval in which the temperature amplitude is located and a preset opening correction coefficient;
adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree;
the preset amplitude interval comprises at least two amplitude intervals; and according to the sequence of the amplitude intervals from large to small, the preset opening correction coefficients corresponding to the amplitude intervals are increased in sequence.
2. The control method of an electronic expansion valve according to claim 1, wherein the step of adjusting the opening degree of the electronic expansion valve based on the opening degree correction coefficient and the current opening degree comprises:
and calculating a first target opening degree based on the opening degree correction coefficient and the current opening degree, and adjusting the opening degree of the electronic expansion valve to the first target opening degree.
3. The control method of an electronic expansion valve according to claim 2, wherein the step of adjusting the opening degree of the electronic expansion valve to the first target opening degree comprises:
acquiring the minimum opening degree of the electronic expansion valve in a heating mode;
determining whether the first target opening degree is greater than the minimum opening degree;
and when the first target opening degree is larger than the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the first target opening degree.
4. The control method of an electronic expansion valve according to claim 3, wherein the step of determining whether the first target opening degree is greater than the minimum opening degree is followed by further comprising:
and when the first target opening degree is smaller than or equal to the minimum opening degree, adjusting the opening degree of the electronic expansion valve to the minimum opening degree.
5. The control method of the electronic expansion valve according to claim 1, wherein the first preset period of time ranges from 2 minutes to 7 minutes, and the second preset period of time ranges from 2 minutes to 5 minutes.
6. The control method of the electronic expansion valve according to any one of claims 1 to 5, wherein the step of obtaining the maximum discharge temperature of the compressor of the air conditioner for a first preset time period when the air conditioner is in a heating mode and the heating mode is maintained for a first preset time period comprises:
when the air conditioner is in a heating mode, adjusting the opening degree of an electronic expansion valve corresponding to the air conditioner to a second target opening degree;
and when the time for maintaining the second target opening degree of the electronic expansion valve reaches a first preset time, acquiring the maximum exhaust temperature of the compressor of the air conditioner within the first preset time.
7. The control method of the electronic expansion valve according to claim 6, wherein the step of adjusting the opening degree of the electronic expansion valve corresponding to the air conditioner to the second target opening degree when the air conditioner is in the heating mode comprises:
when the air conditioner is in a heating mode, acquiring the operating frequency of the compressor, and determining a second target opening degree based on the operating frequency;
and adjusting the opening degree of the electronic expansion valve to the second target opening degree.
8. An air conditioner, characterized in that the air conditioner comprises: memory, a processor and a control program for an electronic expansion valve stored on the memory and executable on the processor, the control program for an electronic expansion valve being executed by the processor to implement the steps of a control method for an electronic expansion valve according to any of claims 1 to 7.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a control program of an electronic expansion valve, which control program, when executed by a processor, implements the steps of the control method of an electronic expansion valve according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750819.8A CN109059226B (en) | 2018-07-09 | 2018-07-09 | Control method of electronic expansion valve, air conditioner and computer readable storage medium |
| PCT/CN2019/092949 WO2020011019A1 (en) | 2018-07-09 | 2019-06-26 | Electronic expansion valve control method, air conditioner and computer readable storage medium |
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| CN201810750819.8A CN109059226B (en) | 2018-07-09 | 2018-07-09 | Control method of electronic expansion valve, air conditioner and computer readable storage medium |
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| CN109059226A CN109059226A (en) | 2018-12-21 |
| CN109059226B true CN109059226B (en) | 2020-04-21 |
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| US9344546B2 (en) | 2014-05-06 | 2016-05-17 | Fitbit, Inc. | Fitness activity related messaging |
| CN109059226B (en) * | 2018-07-09 | 2020-04-21 | 广东美的制冷设备有限公司 | Control method of electronic expansion valve, air conditioner and computer readable storage medium |
| CN110398032B (en) * | 2019-07-01 | 2021-04-27 | 广东美的制冷设备有限公司 | Air conditioner, electronic expansion valve control method and device thereof and storage medium |
| CN110375418A (en) * | 2019-07-01 | 2019-10-25 | 广东美的制冷设备有限公司 | Air conditioner and its control method for electronic expansion valve, control device and storage medium |
| CN111023458B (en) * | 2019-12-30 | 2021-08-10 | 四川长虹空调有限公司 | Electronic expansion valve control method for prolonging frosting period and air conditioner |
| CN111141001B (en) * | 2019-12-31 | 2021-08-24 | Tcl空调器(中山)有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN113959082B (en) * | 2020-07-03 | 2023-05-30 | 广东美的制冷设备有限公司 | Control method and device for air conditioner and computer storage medium |
| CN111981638B (en) * | 2020-08-21 | 2021-08-24 | Tcl空调器(中山)有限公司 | Control method of expansion valve, defrosting device, air conditioner and storage medium |
| CN113339985B (en) * | 2021-05-27 | 2022-11-18 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner electronic expansion valve and air conditioner |
| CN114383268A (en) * | 2021-12-27 | 2022-04-22 | 青岛海尔空调器有限总公司 | Method and device for controlling electronic expansion valve, air conditioner and storage medium |
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| JP3679323B2 (en) * | 2000-10-30 | 2005-08-03 | 三菱電機株式会社 | Refrigeration cycle apparatus and control method thereof |
| CN101592387B (en) * | 2008-05-29 | 2013-09-25 | 乐金电子(天津)电器有限公司 | Method for controlling indoor machine during heating of multi-connected central air conditioner |
| CN103851847A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | System and method for controlling electronic expansion valve of air conditioner, and multi-split air conditioner outdoor unit |
| CN104344495B (en) * | 2013-08-02 | 2018-07-31 | 海尔集团公司 | The control method of compressor exhaust temperature under a kind of air conditioner heat-production state |
| CN105423497B (en) * | 2015-12-18 | 2018-09-04 | Tcl空调器(中山)有限公司 | The control method and device of electric expansion valve |
| JP2017180995A (en) * | 2016-03-31 | 2017-10-05 | 株式会社富士通ゼネラル | Air conditioner |
| CN106152399B (en) * | 2016-07-04 | 2019-05-31 | 青岛海尔空调器有限总公司 | The method for controlling air conditioner electric expansion valve |
| CN106196764B (en) * | 2016-07-19 | 2019-05-14 | 青岛海信日立空调系统有限公司 | A kind of control method and device of electric expansion valve |
| CN106871477A (en) * | 2017-03-13 | 2017-06-20 | 合肥美的暖通设备有限公司 | Defroster, source pump and its Defrost method |
| CN109059226B (en) * | 2018-07-09 | 2020-04-21 | 广东美的制冷设备有限公司 | Control method of electronic expansion valve, air conditioner and computer readable storage medium |
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| CN109059226A (en) | 2018-12-21 |
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