CN112161374B - Variable frequency air conditioner, control method thereof and computer readable storage medium - Google Patents
Variable frequency air conditioner, control method thereof and computer readable storage medium Download PDFInfo
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- CN112161374B CN112161374B CN202011047805.3A CN202011047805A CN112161374B CN 112161374 B CN112161374 B CN 112161374B CN 202011047805 A CN202011047805 A CN 202011047805A CN 112161374 B CN112161374 B CN 112161374B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
Abstract
The invention provides a variable frequency air conditioner and a control method thereof, and a computer readable storage medium, wherein the method comprises the steps of obtaining a set target temperature and an ambient temperature, determining a target operation frequency of a compressor according to the target temperature and the ambient temperature, and gradually adjusting the operation frequency of the compressor to the target operation frequency, wherein when the operation frequency of the compressor is adjusted to the target operation frequency, the operation frequency of the compressor is kept within a preset stay time when a preset frequency stay point is reached; in the operation frequency adjusting process of the compressor, acquiring the exhaust temperature of the compressor, and adjusting the opening degree of the electronic expansion valve according to the exhaust temperature: and increasing or decreasing the opening degree of the electronic expansion valve at a preset rate according to the temperature range section in which the exhaust temperature is located. The variable frequency air conditioner adopts the control method. The program of the computer readable storage medium is capable of implementing the above-described method when executed by a processor. The invention can reduce the airflow noise generated by the variable frequency air conditioner.
Description
Technical Field
The invention relates to the field of control of electric appliances, in particular to a control method of a variable frequency air conditioner, the variable frequency air conditioner applying the method and a computer readable storage medium for realizing the method.
Background
The air conditioner can be divided into a fixed-frequency air conditioner and an inverter air conditioner according to whether the operating frequency of the compressor is fixed or not, the operating frequency of the compressor of the inverter air conditioner is not fixed, but the operating frequency of the compressor is dynamically adjusted according to the temperature and the ambient temperature set by a user, and therefore the advantages of reducing energy consumption of the air conditioner and reducing noise are achieved.
The outdoor unit of the variable frequency air conditioner mostly adopts an electronic expansion valve as a throttling element, the electronic expansion valve adjusts the liquid supply amount of the evaporator according to a preset program, and the variable frequency air conditioner has the advantages of large flow control range, sensitive response, fine adjustment and the like. However, under the condition that the opening degree of the valve core of the electronic expansion valve is small or large, the difference between the pressures before and after the refrigerant flows through the valve core is large, especially in a period of time when the air conditioner is just started, because the opening degree of the electronic expansion valve is unreasonable, the operation frequency of the compressor is not matched with the opening degree of the electronic expansion valve, the pressure when the refrigerant passes through the electronic expansion valve and the impact force on the electronic expansion valve core are large, the electronic expansion valve of the outdoor unit generates airflow noise, and the airflow noise is transmitted to the indoor unit of the variable frequency air conditioner through the pipeline, so that a user hears large noise.
For the inverter air conditioner, during heating, the operating frequency of the compressor can reach 120 hz at most, and at this time, no matter the noise and vibration of the compressor, or the pressure pulsation caused by periodic exhaust of the compressor is severe, not only the noise on the outdoor unit side is large, but also abnormal noise caused by the vibration of the compressor occurs on the indoor unit side far away from the compressor. The refrigerant flowing in the pipe is a rather complicated process, and thus, the stability of the refrigerant flow needs to be improved to eliminate the noise caused by the refrigerant flow. Particularly, when the refrigerant passes through the electronic expansion valve, the refrigerant flow rate, pressure and temperature change are complicated, which is also a main cause of noise generated in the pipe, and the airflow noise of the indoor unit is more unacceptable for users, so that it is necessary to reduce the airflow noise generated by the electronic expansion valve.
The existing variable frequency air conditioner is wrapped with a layer of damping blocks outside an electronic expansion valve to reduce noise generated by the electronic expansion valve, and because airflow noise is very large, a plurality of damping blocks are usually required to be wrapped to prevent the airflow noise from being transmitted out. However, the space of the outdoor unit of the air conditioner is very small, the damping blocks are not easy to wrap, the situation that the wrapping is not tight often occurs, and the airflow noise cannot be weakened and spread out, so that the problem of the airflow noise cannot be well solved by the scheme.
Disclosure of Invention
A first object of the present invention is to provide a control method of an inverter air conditioner capable of reducing noise generated from a compressor and an electronic expansion valve.
The second purpose of the invention is to provide an inverter air conditioner for implementing the control method of the inverter air conditioner.
A third object of the present invention is to provide a computer readable storage medium for implementing the control method of the inverter air conditioner.
In order to achieve the first purpose of the invention, the control method of the inverter air conditioner provided by the invention comprises the steps of obtaining a set target temperature and an ambient temperature, determining a target operation frequency of a compressor according to the target temperature and the ambient temperature, and gradually adjusting the operation frequency of the compressor to the target operation frequency, wherein when the operation frequency of the compressor is adjusted to the target operation frequency, the operation frequency of the compressor is kept within a preset stay time when a preset frequency stay point is reached; in the operation frequency adjusting process of the compressor, acquiring the exhaust temperature of the compressor, and adjusting the opening degree of the electronic expansion valve according to the exhaust temperature: and increasing or decreasing the opening degree of the electronic expansion valve at a preset rate according to the temperature range section in which the exhaust temperature is located.
According to the scheme, the operation frequency of the compressor is not adjusted quickly, but is adjusted when the preset frequency stop point is reached, so that the operation frequency of the compressor is kept stable within the preset stop time, and the phenomenon that the system pressure is overhigh instantaneously due to the overhigh operation frequency of the compressor and airflow noise is directly generated due to overlarge impact on an electronic expansion valve can be avoided. The running frequency of the compressor is suspended and increased in the retention time, so that a pressure recovery and stabilization process can be provided for the whole system, namely a process of refrigerant state recovery and stabilization transition is provided, and the noise generated by the compressor and the electronic expansion valve is reduced.
Preferably, maintaining the operating frequency of the compressor for the preset dwell time comprises, for each preset frequency dwell point reached: when the running frequency of the compressor reaches a first frequency stop point, the running frequency of the compressor is kept within a first preset stop time; when the running frequency of the compressor reaches a second frequency stop point, the running frequency of the compressor is kept within a second preset stop time; when the operating frequency of the compressor reaches a third frequency stopping point, the operating frequency of the compressor is kept within a third preset stopping time; the frequency of the first frequency stop point is less than that of the second frequency stop point, and the frequency of the second frequency stop point is less than that of the third frequency stop point.
Therefore, the plurality of frequency stopping points are set, the stopping time corresponding to each frequency stopping point is set, the running frequency of the compressor can be ensured to stop at different frequency stopping points for the preset time, and the noise reduction effect is better.
The further scheme is that the first preset stay time is less than or equal to the second preset stay time; the second predetermined dwell time is less than or equal to a third predetermined dwell time.
Therefore, as the operating frequency of the compressor is increased, the corresponding preset retention time is also increased, the preset retention time is matched with the operating frequency of the compressor, and the noise reduction effect is improved.
Further, the adjusting the opening degree of the electronic expansion valve according to the exhaust gas temperature includes: if the exhaust temperature is in the first temperature range section, the opening degree of the electronic expansion valve is increased at a first rate; if the exhaust temperature is in the second temperature range section, the opening degree of the electronic expansion valve is increased at a second rate; if the exhaust gas temperature is in the third temperature range section, the opening degree of the electronic expansion valve is decreased at a third rate.
Because the opening degree of the electronic expansion valve is usually positively correlated with the operating frequency of the compressor, the opening degree of the electronic expansion valve is determined by the exhaust temperature of the compressor, and particularly the opening degree of the electronic expansion valve is adjusted at different rates, so that the matching of the opening degree of the electronic expansion valve and the operating frequency of the compressor can be ensured, and the noise reduction effect is improved.
The upper limit temperature value of the first temperature range section is smaller than or equal to the lower limit temperature value of the second temperature range section; the upper temperature value of the second temperature range section is less than or equal to the lower temperature value of the third temperature range section.
It can be seen that determining the rate of change of the opening degree of the electronic expansion valve or the increase or decrease of the opening degree of the electronic expansion valve according to different exhaust temperature range sections can make the opening degree of the electronic expansion valve more match with the operating frequency of the compressor.
Still further, if the exhaust temperature is in the third temperature range section, the opening degree of the electronic expansion valve is decreased at a third rate until the exhaust temperature reaches the target exhaust temperature.
Therefore, after the target exhaust temperature is reached, the opening degree of the electronic expansion valve is basically matched with the operation frequency of the compressor, the opening degree of the electronic expansion valve can not be adjusted any more, and the stable operation of the compressor and the electronic expansion valve is ensured, so that the flowing stability of a refrigerant is improved, and the airflow noise is reduced.
Further alternatively, the second rate is equal to the third rate, and/or the first rate is greater than the second rate.
Further, the adjusting the opening degree of the electronic expansion valve according to the exhaust gas temperature includes: and adjusting the opening degree of the electronic expansion valve to a preset opening degree, and adjusting the opening degree of the electronic expansion valve on the basis of the preset opening degree.
The compressor also starts to operate just when the air conditioner is started, and the opening degree of the electronic expansion valve can be adjusted to a preset opening degree at the moment, for example, the opening degree is close to the opening degree during stable operation, and the opening degree of the electronic expansion valve is gradually adjusted on the basis of the preset opening degree, so that the opening degree of the electronic expansion valve can be quickly adjusted at the starting stage of the air conditioner, and the requirement of refrigerant flowing is met.
In a further aspect, the adjusting the opening degree of the electronic expansion valve during the operation frequency adjustment of the compressor includes: when the running frequency of the compressor is increased, the opening degree of the electronic expansion valve is increased firstly, and then the running frequency of the compressor is increased; when the running frequency of the compressor is reduced, the running frequency of the compressor is reduced firstly, and then the opening degree of the electronic expansion valve is reduced.
Because the opening degree of the electronic expansion valve is adjusted slowly, and the operation frequency of the compressor can be adjusted in a short time, when the frequency of the compressor is increased, the opening degree of the electronic expansion valve is increased first, then the operation frequency of the compressor is increased, the opening degree of the electronic expansion valve can be increased when the operation frequency of the compressor is increased, and the overlarge pressure of a refrigerant is avoided. Similarly, when the frequency of the compressor is reduced, the operation frequency of the compressor is reduced first, and then the opening degree of the electronic expansion valve is reduced, so that the opening degree of the electronic expansion valve is not reduced when the operation frequency of the compressor is reduced, and the air flow noise caused by overlarge pressure of a refrigerant is avoided.
In order to achieve the second objective, the inverter air conditioner provided by the present invention includes a compressor, and a processor and a memory are disposed on a circuit board of the inverter air conditioner, wherein the memory stores a computer program, and the computer program implements the steps of the control method of the inverter air conditioner when executed by the processor.
To achieve the third objective, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the control method for the inverter air conditioner.
Drawings
Fig. 1 is a flowchart of a control method of an inverter air conditioner according to an embodiment of the present invention.
Fig. 2 is a flow chart of the control of the electronic expansion valve in the control method embodiment of the inverter air conditioner of the invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
The control method of the variable frequency air conditioner is applied to the variable frequency air conditioner, an outdoor unit of the variable frequency air conditioner is provided with a compressor and an electronic expansion valve, a circuit board is arranged on the variable frequency air conditioner, a processor and a memory are arranged on the circuit board, the memory stores a computer program, and the processor executes the computer program to realize the control method of the variable frequency air conditioner.
The embodiment of the control method of the variable frequency air conditioner comprises the following steps:
referring to fig. 1, after the inverter air conditioner is powered on, step S1 is first executed to obtain a target temperature set by a user and an ambient temperature, for example, a target temperature set by the user via a remote controller, and obtain an indoor ambient temperature and an outdoor ambient temperature, and a target operating frequency of the compressor can be determined according to the target temperature, the indoor ambient temperature and the outdoor ambient temperature set by the user. Generally, an inverter air conditioner sets an operating frequency range of a compressor at different target temperatures and different ambient temperatures in advance, and takes an upper threshold value of the operating frequency range as a target operating frequency of the compressor.
Then, step S2 is executed, the compressor starts to operate, and the operating frequency of the compressor is gradually increased from 0 hz to the target operating frequency, preferably, the frequency increasing rate of the compressor is 1 hz to 2 hz per second. If the frequency rising rate of the compressor is too fast, the pressure difference between two ends of the electronic expansion valve is easy to be too large, the reliability of an air conditioning system is further influenced, and the expected stability of the air conditioner is poor. If the operating frequency of the compressor is increased too slowly, the cooling effect is affected, for example, resulting in too slow cooling or heating.
As the operating frequency of the compressor increases, the pressure in the pipeline will rapidly increase, and the discharge temperature of the compressor also begins to rapidly increase, so that the pressure difference between the two ends of the electronic expansion valve begins to increase. When the refrigerant passes through the electronic expansion valve, the pressure of the refrigerant generates certain impact force on a valve core of the electronic expansion valve, when the impact force is increased to a certain degree, airflow noise begins to appear in a pipeline, and the noise is sharp due to the fact that the frequency of the noise is high. For this reason, it is necessary to avoid the flow noise caused by the excessive pressure difference across the electronic expansion valve.
In order to ensure that the electronic expansion valve is in an optimal working state, the embodiment solves the air flow noise by controlling the rising rate of the operating frequency of the compressor and the opening degree of the electronic expansion valve, i.e. ensuring that the operating frequency of the compressor is matched with the opening degree of the electronic expansion valve, so that the pressure difference between two ends of the electronic expansion valve is smaller, and the air flow noise generated by overlarge impact force of a valve core is avoided.
Therefore, when the compressor starts to operate, the opening degree of the electronic expansion valve is set to a preset opening degree, which is an initial opening degree of the electronic expansion valve, and is set, for example, near an opening degree at which the compressor is rated to perform heating or cooling operation stably. In addition, in the process of increasing the operating frequency of the compressor, a preset frequency stop point is set, and the preset frequency stop point is stopped for a period of time, for example, the operating frequency of the compressor is stopped for a period of time every time the operating frequency of the compressor is increased by 8 Hz to 10 Hz, so that the pressure of the air conditioning system is prevented from being excessively high instantaneously due to the fact that the operating frequency of the compressor is increased too fast, and airflow noise caused by overlarge impact force on a valve core is avoided.
For this reason, after the frequency of the compressor starts to increase, step S3 is executed to determine whether the operating frequency of the compressor reaches a preset frequency stop point, and if so, step S4 is executed to maintain the operating frequency of the compressor for a preset stop time. In this embodiment, a plurality of preset frequency stop points are set, for example, the first frequency stop point is 30 hz, and if the operating frequency of the compressor reaches 30 hz, the operating frequency of the compressor is suspended to increase, and the stop time is about 30 seconds. Thus, the frequency of the first frequency dwell point is 30 hertz and the first preset dwell time at the first frequency dwell point is 30 seconds.
Correspondingly, the second frequency dwell point is 40 hz, and when the operating frequency of the compressor reaches 40 hz, the operating frequency of the compressor will again be suspended for a dwell time of between 30 seconds and 60 seconds. Thus, the frequency of the second frequency dwell point is 40 hertz and the second preset dwell time at the second frequency dwell point is 30 to 60 seconds.
The third frequency dwell point is 50 hz, and when the operating frequency of the compressor reaches 50 hz, the operating frequency of the compressor will be suspended again for a dwell time of between 60 seconds and 90 seconds. Thus, the frequency of the third frequency dwell point is 50 hz, and the third predetermined dwell time at the third frequency dwell point is 60 seconds to 90 seconds.
It can be seen that, in this embodiment, as the frequency of the frequency stopping point increases, the corresponding preset stopping time will increase, so that when the operating frequency of the compressor is higher, there is sufficient stopping time to make the system recover to be stable, and the generation of noise is reduced.
As the operating frequency of the compressor is continuously increased, the operating frequency of the compressor may reach the target operating frequency, and therefore, step S5 needs to be executed to determine whether the operating frequency of the compressor reaches the target operating frequency, if so, step S6 is executed to adjust the operating frequency of the compressor according to the actual operating condition, that is, the operating frequency of the compressor does not necessarily continue to increase, and the operating frequency of the compressor may decrease according to the actual operating condition. And if the operating frequency of the compressor does not reach the target operating frequency, adjusting the operating frequency of the compressor to enable the operating frequency of the compressor to reach the target operating frequency.
In the process of adjusting the operating frequency of the compressor, the opening degree of the electronic expansion valve needs to be synchronously adjusted, so that the opening degree of the electronic expansion valve is matched with the operating frequency of the compressor, and the generation of air flow noise is avoided. The opening degree of the electronic expansion valve is adjusted according to the exhaust temperature of the compressor. When the compressor is started, the opening degree of the electronic expansion valve needs to be adjusted to a preset opening degree, for example, the opening degree of the electronic expansion valve is adjusted to be about 200 b. Wherein, the opening degree of the electronic expansion valve can be adjusted within the opening degree range of 0-500 b.
Referring to fig. 2, step S11 is first executed to determine a target discharge temperature of the compressor, for example, to determine an upper discharge temperature threshold of the compressor according to the operation condition, and to use the upper discharge temperature threshold as the target discharge temperature. Then, the actual discharge temperature of the compressor is acquired in real time, i.e., step S12 is performed.
In this embodiment, the discharge temperature is set to a plurality of temperature range segments, the actual discharge temperature of the compressor is in different temperature range segments, and the opening degree of the electronic expansion valve is increased or decreased at different rates. In particular, the different temperature range segments generally correspond to compressor operation within a range of operating frequencies.
For example, when the operating frequency of the compressor is near the first frequency dwell point, the discharge temperature of the compressor is generally within a first temperature range that is generally between 20 ℃ and 40 ℃ below the target discharge temperature, and when the discharge temperature of the compressor is within the first temperature range, the opening degree of the electronic expansion valve is increased at a first rate. Therefore, after the discharge temperature is obtained, step S13 is executed to determine whether the actual discharge of the compressor is within the first discharge temperature range, where the lower limit temperature value of the first discharge temperature range may be the target discharge temperature-40 ℃ and the upper limit temperature value of the first discharge temperature range may be the target discharge temperature-20 ℃. For example, the target exhaust temperature is 85 ℃, the first temperature range segment may be 45 ℃ to 65 ℃. When the discharge temperature of the compressor is within the first temperature range segment, the operating frequency of the compressor is typically near the first frequency dwell point, i.e., near 30 hertz.
If the actual discharge temperature of the compressor is within the first temperature range section, step S14 is performed to increase the opening degree of the electronic expansion valve at a first rate, for example, at a rate of 1b/5S to 1 b/3S. If the opening degree adjustment rate of the electronic expansion valve is too fast or too slow, it will not match the operation frequency rising rate of the compressor, and air flow noise will be generated.
As the exhaust temperature continues to rise, step S15 is executed to determine whether the actual exhaust of the compressor is in the second exhaust temperature range, where the lower limit temperature value of the second exhaust temperature range may be-20 ℃ of the target exhaust temperature and the upper limit temperature value of the first exhaust temperature range may be-10 ℃ of the target exhaust temperature. For example, the target exhaust temperature is 85 deg.c, the second temperature range segment may be 65 deg.c to 75 deg.c. It can be seen that the upper temperature value of the first temperature range segment is less than or equal to the lower temperature value of the second temperature range segment. When the discharge temperature of the compressor is within the second temperature range segment, the operating frequency of the compressor is typically near the second frequency dwell point, i.e., near 40 hertz.
If the actual discharge temperature of the compressor is within the second temperature range section, step S16 is performed to increase the opening degree of the electronic expansion valve at a second rate, for example, at a rate of 1b/10S-1 b/6S. It is possible that the second rate is lower than the first rate because the exhaust gas temperature is relatively high and the opening degree of the electronic expansion valve has increased, so the opening degree of the electronic expansion valve can be increased at a slower rate.
As the exhaust temperature continues to rise, step S17 is executed to determine whether the actual exhaust of the compressor is in a third exhaust temperature range segment, where the lower limit temperature value of the third exhaust temperature range segment may be the target exhaust temperature-10 ℃, and the upper limit temperature value of the third exhaust temperature range segment may be the target exhaust temperature. For example, the target exhaust temperature is 85 deg.c, the third temperature range segment may be 75 deg.c to 85 deg.c. It can be seen that the upper temperature value of the second temperature range segment is less than or equal to the lower temperature value of the third temperature range segment. When the discharge temperature of the compressor is within the third temperature range band, the operating frequency of the compressor is typically near the third frequency dwell point, i.e., near 50 hertz.
If the actual discharge temperature of the compressor is within the third temperature range, step S18 is executed to decrease the opening degree of the electronic expansion valve at a third rate, which is the same as the second rate in this embodiment, i.e., at a rate of 1b/10S-1 b/6S. Since the discharge temperature of the compressor has already approached the target discharge temperature, if the opening degree of the electronic expansion valve continues to increase, the operating frequency of the compressor that needs to be matched needs to be increased, possibly resulting in the discharge temperature of the compressor exceeding the target discharge temperature. Therefore, in the third temperature range section, the opening degree of the electronic expansion valve is gradually reduced, so that the opening degree of the electronic expansion valve is already gradually reduced when the exhaust gas temperature reaches the target exhaust gas temperature, and the exhaust gas temperature is prevented from continuously rising.
If the result of the determination in the step S17 is negative, step S19 is executed to determine whether the discharge temperature of the compressor reaches the target discharge temperature, and if the discharge temperature of the compressor reaches the target discharge temperature, the opening adjustment of the electronic expansion valve is stopped, and the opening of the electronic expansion valve is maintained. Of course, if the operation frequency of the compressor needs to be adjusted according to the actual operating condition, the opening degree of the electronic expansion valve can be adjusted according to the actual operation frequency of the compressor.
Since the operation frequency of the compressor can be rapidly adjusted in a short time, but the opening degree adjustment speed of the electronic expansion valve is slow, when the operation frequency of the compressor is increased, the opening degree of the electronic expansion valve is increased first, and then the operation frequency of the compressor is increased, and when the operation frequency of the compressor is decreased, the operation frequency of the compressor is decreased first, and then the opening degree of the electronic expansion valve is decreased. Therefore, when the frequency of the compressor is increased, the opening degree of the electronic expansion valve can be increased when the operating frequency of the compressor is increased, and the phenomenon that the pressure of a refrigerant is overlarge is avoided.
When the operating frequency of the compressor is increased, the opening degree of the electronic expansion valve is increased first, and then the operating frequency of the compressor is increased. Similarly, when the operating frequency of the compressor is decreased, the operating frequency of the compressor is decreased a few seconds in advance, and then the opening degree of the electronic expansion valve is decreased.
When the exhaust temperature of the compressor reaches the target exhaust temperature, the variable frequency air conditioner is in a stable operation state, the operation frequency of the compressor has a slow frequency reduction process according to the environment temperature, at the moment, the opening degree of the electronic expansion valve needs to be adjusted according to the actual operation frequency of the compressor, the system pressure fluctuation in the process is small, the operation frequency of the compressor is reduced firstly, and then the opening degree of the electronic expansion valve is reduced, so that the airflow noise is not generated.
Therefore, the operation frequency of the compressor stays for a period of time after rising by a certain numerical value, the phenomenon that the operation frequency of the compressor rises too fast and the opening degree of the electronic expansion valve cannot be adjusted to follow the operation frequency change of the compressor is avoided, and therefore the generation of airflow noise is reduced. Further, the opening degree of the electronic expansion valve is adjusted prior to the increase in the operating frequency of the compressor, which is also advantageous in reducing the airflow noise. By applying the control method of the embodiment, the heating or stable heating state can be quickly achieved within 5 minutes after the variable frequency air conditioner is started, and the performance of the starting time period is greatly improved. In the existing control method, the initial opening of the electronic expansion valve is set to be large, and the operating frequency of the compressor rapidly rises, so that the opening of the electronic expansion valve is not matched with the operating frequency of the compressor, the target opening of the electronic expansion valve can be reached within about 20 to 30 minutes, and airflow noise is easily caused.
The embodiment of the variable frequency air conditioner comprises:
the inverter air conditioner of the embodiment comprises an indoor unit and an outdoor unit, wherein the outdoor unit is provided with a compressor and an electronic expansion valve, the inverter air conditioner is provided with a circuit board, a processor and a memory are arranged on the circuit board, a computer program capable of running on the processor is stored in the memory, and each step of the control method of the inverter air conditioner is realized when the processor executes the computer program.
For example, a computer program may be partitioned into one or more modules that are stored in a memory and executed by a processor to implement the modules of the present invention. One or more of the modules may be a sequence of computer program instruction segments capable of performing certain functions and describing the execution of the computer program in the processor.
The Processor may be a Central Processing Unit (CPU), or may be other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the appliance and connected to the various parts of the overall appliance by various interfaces and lines.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the appliance by operating or executing the computer programs and/or modules stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the appliance, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Computer-readable storage medium embodiments:
the computer program stored in the memory of the inverter air conditioner may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the flow in the method according to the above embodiment may also be implemented by a computer program instructing related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the control method of the inverter air conditioner.
Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
Finally, it is emphasized that the present invention is not limited to the above-described embodiments, such as the change of the setting of a plurality of temperature range segments or the change of the frequency stop points, and these changes should be included in the protection scope of the claims of the present invention.
Claims (11)
1. The control method of the variable frequency air conditioner comprises the following steps:
acquiring a set target temperature and an ambient temperature, determining a target operating frequency of a compressor according to the target temperature and the ambient temperature, and gradually adjusting the operating frequency of the compressor to the target operating frequency;
the method is characterized in that:
when the operating frequency of the compressor is adjusted to the target operating frequency, maintaining the operating frequency of the compressor within a preset retention time when a preset frequency retention point is reached;
in the operation frequency adjusting process of the compressor, acquiring the exhaust temperature of the compressor, and adjusting the opening degree of the electronic expansion valve according to the exhaust temperature: increasing or decreasing the opening degree of the electronic expansion valve at a preset speed according to the temperature range section where the exhaust temperature is located;
adjusting the opening degree of the electronic expansion valve in the operation frequency adjustment process of the compressor includes: when the running frequency of the compressor is increased, firstly increasing the opening degree of the electronic expansion valve, and then increasing the running frequency of the compressor; when the operating frequency of the compressor is reduced, the operating frequency of the compressor is reduced first, and then the opening degree of the electronic expansion valve is reduced.
2. The control method of the inverter air conditioner according to claim 1, wherein:
maintaining the operating frequency of the compressor for a preset dwell time, each time a preset frequency dwell point is reached, comprises:
when the operating frequency of the compressor reaches a first frequency dwell point, maintaining the operating frequency of the compressor within a first preset dwell time;
when the operating frequency of the compressor reaches a second frequency stop point, maintaining the operating frequency of the compressor within a second preset stop time;
when the operating frequency of the compressor reaches a third frequency stopping point, maintaining the operating frequency of the compressor within a third preset stopping time;
the frequency of the first frequency stop point is less than that of the second frequency stop point, and the frequency of the second frequency stop point is less than that of the third frequency stop point.
3. The control method of the inverter air conditioner according to claim 2, wherein:
the first preset stay time is less than or equal to the second preset stay time;
the second preset dwell time is less than or equal to the third preset dwell time.
4. The control method of the inverter air conditioner according to any one of claims 1 to 3, wherein:
adjusting the opening degree of the electronic expansion valve according to the exhaust temperature includes:
if the exhaust temperature is in a first temperature range section, the opening degree of the electronic expansion valve is increased at a first rate;
if the exhaust temperature is in a second temperature range section, the opening degree of the electronic expansion valve is increased at a second rate;
if the exhaust temperature is in a third temperature range segment, the opening degree of the electronic expansion valve is decreased at a third rate.
5. The control method of the inverter air conditioner according to claim 4, wherein:
the upper limit temperature value of the first temperature range section is less than or equal to the lower limit temperature value of the second temperature range section;
the upper temperature value of the second temperature range section is less than or equal to the lower temperature value of the third temperature range section.
6. The control method of the inverter air conditioner according to claim 4, wherein:
if the exhaust temperature is in a third temperature range segment, the opening degree of the electronic expansion valve is decreased at a third rate until the exhaust temperature reaches a target exhaust temperature.
7. The control method of the inverter air conditioner according to claim 4, wherein:
the second rate is equal to the third rate.
8. The control method of the inverter air conditioner according to claim 4, wherein:
the first rate is greater than the second rate.
9. The control method of the inverter air conditioner according to any one of claims 1 to 3, wherein:
adjusting the opening degree of the electronic expansion valve according to the exhaust temperature includes: and adjusting the opening degree of the electronic expansion valve to a preset opening degree, and adjusting the opening degree of the electronic expansion valve on the basis of the preset opening degree.
10. Inverter air conditioner, characterized in that, including the compressor, and inverter air conditioner's circuit board is provided with processor and memory, the memory stores the computer program, the computer program when executed by the processor realizes the steps of inverter air conditioner's control method according to any one of claims 1 to 9.
11. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the steps of the control method of an inverter air conditioner according to any one of claims 1 to 9.
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| CN114047732B (en) * | 2021-11-15 | 2023-05-30 | 中国电子科技集团公司第四十八研究所 | Butterfly valve intelligent control method and system for silicon carbide epitaxial process |
| CN114608194A (en) * | 2022-02-07 | 2022-06-10 | 青岛海尔空调器有限总公司 | Control method and control system for air conditioner noise, electronic equipment and storage medium |
| CN114623589B (en) * | 2022-02-07 | 2024-01-16 | 青岛海尔空调器有限总公司 | Control method and control system for air conditioner noise, electronic equipment and storage medium |
| CN115059994A (en) * | 2022-03-16 | 2022-09-16 | 北京小米移动软件有限公司 | Air conditioner control method and device and storage medium |
| CN114923297A (en) * | 2022-04-02 | 2022-08-19 | 青岛海尔空调器有限总公司 | Electronic expansion valve opening degree control method, device, equipment, medium and product |
| CN114992816B (en) * | 2022-06-20 | 2023-09-08 | 宁波奥克斯电气股份有限公司 | Control method and device of multi-split air conditioner, air conditioner and readable storage medium |
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