CN115540309A - Control method and system for rapid cooling and heating mode, electronic device and medium - Google Patents
Control method and system for rapid cooling and heating mode, electronic device and medium Download PDFInfo
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- CN115540309A CN115540309A CN202210928400.3A CN202210928400A CN115540309A CN 115540309 A CN115540309 A CN 115540309A CN 202210928400 A CN202210928400 A CN 202210928400A CN 115540309 A CN115540309 A CN 115540309A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method, a system, electronic equipment and a medium for a rapid refrigerating and heating mode, wherein the control method comprises the following steps: determining that the air conditioner is in a rapid refrigerating and heating mode, adjusting a compressor to an initial frequency, and adjusting an expansion valve to an initial opening degree; correcting the operating frequency of the compressor on the basis of the initial frequency based on the discharge temperature of the compressor; the opening degree of the expansion valve is corrected based on the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger. According to the control method of the rapid refrigerating and heating mode, the compressor is adjusted to the initial frequency to work, the expansion valve is adjusted to the initial opening degree to work, the exhaust temperature of the compressor is used for correcting the working frequency of the compressor, and meanwhile the exhaust temperature and the refrigerant pressure of the heat exchanger are used for correcting the opening degree of the expansion valve, so that the air conditioner can achieve the purpose of rapid refrigerating or heating on the basis of rapidly completing oil return, and user experience is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control system for a rapid cooling and heating mode, electronic equipment and a medium.
Background
With the increasing living standard, the requirements of people on the quality of life are higher and higher, and the requirements are particularly obvious on household appliances. At present, almost all types of air conditioners have the function of adding a quick refrigeration and heating mode, but the adjustment of the quick refrigeration and heating mode system is mainly controlled according to the air outlet temperature and the cooling time in a room.
The significance of rapid refrigeration and heating lies in that rapid refrigeration or heating is realized within 5-10 minutes of the starting time period, but the starting of the rapid refrigeration and heating mode conflicts with the oil return function when the compressor is started, and how to balance the two function points is the problem which is difficult to solve by the existing rapid refrigeration mode.
Disclosure of Invention
The embodiment of the invention provides a control method, a control system, electronic equipment and a medium of a rapid refrigerating and heating mode, which are at least used for solving the problem that the starting of the rapid refrigerating and heating mode of the existing air conditioner conflicts with the oil return function when a compressor is started.
The embodiment of the invention provides a control method of a rapid refrigerating and heating mode, which comprises the following steps:
determining that the air conditioner is in a rapid refrigerating and heating mode, adjusting a compressor to an initial frequency, and adjusting an expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner;
correcting an operating frequency of the compressor based on the initial frequency based on a discharge temperature of the compressor;
and correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
According to an embodiment of the present invention, the step of correcting the operating frequency of the compressor based on the initial frequency based on the discharge temperature of the compressor includes:
in the case that the discharge temperature is less than a first target discharge temperature, increasing the operating frequency of the compressor on the basis of the initial frequency;
and in the case that the exhaust temperature is greater than or equal to the first target exhaust temperature, reducing or maintaining the working frequency of the compressor on the basis of the initial frequency.
According to the control method of the rapid cooling and heating mode provided by one embodiment of the invention, the first target exhaust temperature is the exhaust temperature corresponding to the compressor when the cooling or heating efficiency is the highest.
According to the control method of the rapid cooling and heating mode provided by an embodiment of the present invention, the step of correcting the opening degree of the expansion valve based on the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger includes:
determining a first adjustment amount of the expansion valve opening degree based on the exhaust gas temperature;
determining a second adjustment amount of the opening degree of the expansion valve based on the refrigerant pressure;
determining an opening degree of the expansion valve based on the first adjustment amount and the second adjustment amount on the basis of the initial opening degree.
According to the control method of the rapid cooling and heating mode provided by one embodiment of the present invention, the step of determining the first adjustment amount of the opening degree of the expansion valve based on the exhaust gas temperature includes:
increasing the first adjustment amount in a case where the exhaust temperature is less than a second target exhaust temperature;
and when the exhaust temperature is greater than or equal to the second target temperature, reducing the first adjustment amount.
According to an embodiment of the present invention, the step of determining the second adjustment amount of the opening of the expansion valve based on the refrigerant pressure includes:
increasing the second adjustment amount under the condition that the refrigerant pressure is smaller than the target refrigerant pressure;
and reducing the second adjustment amount when the refrigerant pressure is greater than or equal to the target refrigerant pressure.
According to the control method of the rapid cooling and heating mode provided by an embodiment of the present invention, after the steps of determining that the air conditioner is in the rapid cooling and heating mode, adjusting the compressor to the initial frequency, and adjusting the expansion valve to the initial opening degree, the step of correcting the operating frequency of the compressor based on the discharge temperature of the compressor on the basis of the initial frequency further includes:
and after the compressor finishes the preset time after oil return, performing the subsequent steps.
The invention also provides a control system of the rapid refrigerating and heating mode, which comprises:
the adjusting module is used for determining that the air conditioner is in a quick refrigerating and heating mode, adjusting the compressor to an initial frequency and adjusting the expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner;
a first correction module for correcting the operating frequency of the compressor based on the initial frequency based on the discharge temperature of the compressor;
and the second correction module is used for correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
The embodiment of the invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the control method of the quick refrigerating and heating mode.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the control method of the above-mentioned fast cooling and heating mode.
The embodiment of the present invention is also a computer program product including a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer being capable of executing the control method of the above-described rapid cooling and heating mode.
According to the control method, the control system, the electronic equipment and the medium for the rapid refrigerating and heating mode, the air conditioner is determined to be in the rapid refrigerating and heating mode, the compressor is adjusted to the initial frequency to work, the expansion valve is adjusted to the initial opening degree to work, in the subsequent working process, the working frequency of the compressor is corrected by utilizing the exhaust temperature of the compressor, and meanwhile, the opening degree of the expansion valve is corrected by utilizing the exhaust temperature and the refrigerant pressure of the heat exchanger, so that the air conditioner can achieve the purpose of rapid refrigerating or heating on the basis of rapidly completing oil return, and user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a control method of a rapid cooling and heating mode according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method of a rapid cooling and heating mode according to another embodiment of the present invention;
fig. 3 is a schematic flow chart of a control method of a rapid cooling and heating mode according to another embodiment of the present invention;
FIG. 4 is a schematic flow chart of a rapid cooling and heating mode provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control system of a rapid cooling and heating mode according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
reference numerals:
510. an adjustment module; 520. a first correction module; 530. a second correction module; 610. a processor; 620. a communication interface; 630. a memory; 640. a communication bus.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The invention provides a control method of a quick refrigeration and heating mode, which is used for controlling an air conditioner, wherein the controlled air conditioner can be a wall-mounted air conditioner, a vertical cabinet air conditioner, a window air conditioner, a ceiling air conditioner and the like, and is not limited herein.
As shown in fig. 1, the control method of the rapid cooling and heating mode includes the following steps:
step S110: and determining that the air conditioner is in a quick refrigerating and heating mode, adjusting the compressor to the initial frequency, and adjusting the expansion valve to the initial opening degree.
After the air conditioner is started, if the quick refrigerating and heating mode input by a user is received, the air conditioner starts the quick refrigerating and heating mode according to the command of the quick refrigerating and heating mode. In this embodiment, the quick refrigeration heating mode includes: a rapid cooling mode, a rapid heating mode, and the like.
In case that the air conditioner starts a rapid cooling mode or a rapid heating mode, the air conditioner adjusts a frequency of the compressor and an opening degree of the expansion valve. The compressor is adjusted to the initial frequency and the expansion valve is adjusted to the initial opening at the same time. The initial frequency of the compressor corresponds to the maximum oil return frequency of the air conditioner, that is, in the case that the compressor is at the initial frequency, the oil return speed of the compressor at the frequency is at the maximum value. The initial opening of the expansion valve corresponds to the minimum oil return opening of the air conditioner, namely the initial opening of the expansion valve is kept at the valve opening at the oil return lowest liquid level. Therefore, the maximum oil return rate can be maintained during the operation of the air conditioner.
Specifically, when the compressor is operated, the refrigerant in the compressor is rapidly discharged to circulate through the piping system. In the circulation process, the lubricating oil is discharged out of the compressor along with the refrigerant and enters a pipeline, and the dynamic balance of the lubricating oil in the whole system can be maintained only if the discharged part of the lubricating oil smoothly returns to the compressor (namely oil return), otherwise, the compressor is damaged due to oil shortage.
In order to solve the problems, under the condition that the air conditioner starts a quick cooling mode or a quick heating mode, the frequency is quickly adjusted to the initial frequency, the frequency is directly and quickly increased to the maximum oil return frequency after the compressor is started, in order to ensure quick oil return of the compressor in the process of working at the maximum oil return frequency of the compressor, the opening degree of the expansion valve is controlled and adjusted, the opening degree of the expansion valve is driven by a stepping motor, and the stepping motor drives the opening degree of the expansion valve to be reduced, so that the initial opening degree of the expansion valve corresponds to the minimum oil return opening degree of the air conditioner. For example, the opening degree of the expansion valve when the air conditioner is in the closed state may be 500 steps. The reference opening degree is an opening degree corresponding to the outdoor temperature and the compressor frequency, which is set according to the operation mode, and it is assumed that the reference opening degree may be 300 steps. That is, after the air conditioner is normally started, the opening degree of the expansion valve is firstly reduced from 500 steps to 300 steps, and if the quick cooling and heating mode is started, the opening degree is reduced from 300 steps to the minimum oil return opening degree. Thus, the compressor and the expansion valve can maintain the maximum oil return rate, so that part of the discharged lubricating oil quickly returns to the compressor, and the dynamic balance of the lubricating oil in the whole system is maintained.
Step S120: the operating frequency of the compressor is corrected based on the initial frequency based on the discharge temperature of the compressor.
The increase of the working frequency of the compressor directly affects the speed of the air conditioner for cooling and heating, but the discharge speed of the lubricating oil is faster and faster along with the increase of the working frequency of the compressor, and when the discharge speed of the lubricating oil exceeds the maximum oil return speed of the oil return capillary tube, the phenomenon of oil shortage is easy to generate.
After the compressor and the expansion valve are adjusted, in order to ensure the cooling and heating speed of the air conditioner, the air conditioner acquires the exhaust temperature of the compressor through a sensor, corrects the working frequency of the compressor on the basis of the initial frequency on the basis of the exhaust temperature, so that the exhaust temperature can be maintained in a certain range on the basis of ensuring oil return, and the cooling or heating speed of the air conditioner is ensured.
Step S130: the opening degree of the expansion valve is corrected based on the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
The air conditioner continuously acquires the refrigerant pressure of the heat exchanger through the sensor while correcting the working frequency of the compressor on the basis of the initial frequency based on the exhaust temperature.
Specifically, the air conditioner acquires the pressure of a refrigerant in the indoor heat exchanger through the sensor during refrigeration, corrects the opening degree of the expansion valve on the basis of the initial opening degree of the expansion valve on the basis of the exhaust temperature and the pressure of the refrigerant in the indoor heat exchanger, and ensures the refrigeration speed of the air conditioner on the basis of ensuring normal oil return under the refrigeration working condition.
The air conditioner acquires the pressure of a refrigerant in the outdoor heat exchanger through the sensor during heating, corrects the opening degree of the expansion valve on the basis of the initial opening degree of the expansion valve on the basis of the exhaust temperature and the pressure of the refrigerant in the outdoor heat exchanger, and ensures the heating speed of the air conditioner on the basis of ensuring the normal oil return of the heating condition.
According to the control method of the rapid refrigerating and heating mode, the compressor is adjusted to the initial frequency to work, the expansion valve is adjusted to the initial opening degree to work, the exhaust temperature of the compressor is used for correcting the working frequency of the compressor, and meanwhile the exhaust temperature and the refrigerant pressure of the heat exchanger are used for correcting the opening degree of the expansion valve, so that the air conditioner can achieve the purpose of rapid refrigerating or heating on the basis of rapidly finishing oil return, and the user experience is improved.
In one example, as shown in fig. 2, step S120: the step of correcting the operating frequency of the compressor on the basis of the initial frequency based on the discharge temperature of the compressor includes:
step S210: it is determined whether the exhaust temperature reaches a first target exhaust temperature.
After the air conditioner acquires the exhaust temperature of the compressor through the sensor, the exhaust temperature of the compressor is compared with a first target exhaust temperature, and whether the exhaust temperature reaches the first target exhaust temperature or not is judged.
Step S220: in the case where the discharge temperature is less than the first target discharge temperature, the operating frequency of the compressor is increased on the basis of the initial frequency.
Since the exhaust temperature is the temperature of the exhaust gas after the compressor has worked, it can be measured from the exhaust pipe by a thermometer. The exhaust temperature is proportional to the pressure ratio and the intake temperature. The larger the pressure ratio, the higher the suction temperature, and the higher the discharge temperature. In the process of ensuring the rapid cooling and heating of the air conditioner, the exhaust temperature needs to be ensured within a stable range. Thus, a first target discharge temperature is set, which is typically lower than 150 degrees celsius, and those skilled in the art can set the first target discharge temperature to any reasonable value so that it meets more specific application scenarios, for example, the first target discharge temperature can be set to the discharge temperature corresponding to the highest cooling or heating efficiency.
After the comparison, when the detected exhaust temperature is determined to be less than the first target exhaust temperature, that is, the detected exhaust temperature is less than the first target exhaust temperature, it is indicated that the exhaust temperature does not reach the design requirement, and the exhaust temperature needs to be further increased, and the operating frequency of the compressor is increased on the basis of the initial frequency of the compressor.
Step S230: in the case where the discharge temperature is equal to or greater than the first target discharge temperature, the operating frequency of the compressor is reduced or maintained on the basis of the initial frequency.
And when the exhaust temperature of the compressor is greater than or equal to the first target exhaust temperature, namely the detected exhaust temperature is greater than or equal to the first target exhaust temperature, the exhaust temperature exceeds the design requirement, and the working frequency of the compressor is reduced on the basis of the initial frequency without further increasing the exhaust temperature, or the working frequency of the compressor is kept to continue working.
After the adjustment, the exhaust temperature can be obtained again, and the working frequency of the compressor is continuously corrected by utilizing the first target exhaust temperature.
Based on the above embodiment, as shown in fig. 3 and 4, step S130: the step of correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger comprises the following steps:
step S310: based on the exhaust temperature, a first adjustment amount of the expansion valve opening is determined.
After the air conditioner acquires the exhaust temperature through the sensor, the first adjustment amount of the opening degree of the expansion valve is determined based on the exhaust temperature. For example, the value of the first adjustment amount is increased when the exhaust temperature is low, and the value of the first adjustment amount is decreased when the exhaust temperature is high.
Specifically, before the exhaust temperature is obtained, a second target exhaust temperature is set, and the second target exhaust temperature is generally lower than 150 degrees celsius, and a person skilled in the art may set the second target exhaust temperature to any reasonable value so that it meets more specific application scenarios, for example, the second target exhaust temperature may be set to a temperature corresponding to the highest cooling or heating efficiency.
After the second target exhaust temperature is determined, the air conditioner acquires the exhaust temperature through a sensor, and compares the detected exhaust temperature with the second target exhaust temperature. It is determined whether the detected exhaust temperature reaches a second target exhaust temperature.
After the comparison, if it is determined that the detected exhaust temperature is less than the second target exhaust temperature, that is, the detected exhaust temperature is less than the second target exhaust temperature, it indicates that the exhaust temperature does not reach the design requirement, and if the exhaust temperature needs to be further raised, the first adjustment amount is increased to increase the opening degree of the expansion valve.
And when the exhaust temperature of the compressor is greater than or equal to the second target exhaust temperature, that is, the detected exhaust temperature is greater than or equal to the second target exhaust temperature, it indicates that the exhaust temperature exceeds the design requirement, and the first adjustment amount is reduced without further raising the exhaust temperature, so as to reduce the opening degree of the expansion valve.
In general, when the detected exhaust gas temperature is less than the second target exhaust gas temperature, the first adjustment amount is a positive value to increase the opening degree of the expansion valve. When the detected exhaust temperature is larger than or equal to the second target exhaust temperature, the first adjustment amount is a negative value so as to reduce the opening degree of the expansion valve.
Step S320: a second adjustment amount of the opening degree of the expansion valve is determined based on the refrigerant pressure.
After the air conditioner acquires the refrigerant pressure through the sensor, the second adjustment amount of the opening degree of the expansion valve is determined based on the refrigerant pressure. For example, the value of the second adjustment amount is increased when the refrigerant pressure is low, and the value of the second adjustment amount is decreased when the refrigerant pressure is high.
Specifically, before the refrigerant pressure in the indoor heat exchanger or the outdoor heat exchanger is obtained, the target refrigerant pressure is set, and those skilled in the art can set the target refrigerant pressure to any reasonable value, so that the target refrigerant pressure can meet more specific application scenarios.
After the target refrigerant pressure is determined, the air conditioner acquires the refrigerant pressure through the sensor, and compares the detected refrigerant pressure with the target refrigerant pressure. And judging whether the detected refrigerant pressure reaches the target refrigerant pressure.
After the comparison, under the condition that the detected refrigerant pressure is determined to be less than the target refrigerant pressure, that is, under the condition that the detected refrigerant pressure is less than the target refrigerant pressure, it is indicated that the refrigerant pressure does not reach the design requirement, and the pressure needs to be further increased, and then the second adjustment amount is increased to increase the opening degree of the expansion valve.
And under the condition that the pressure of the refrigerant of the compressor is greater than or equal to the target pressure of the refrigerant, namely the detected pressure of the refrigerant is greater than or equal to the target pressure of the refrigerant, the pressure of the refrigerant is indicated to exceed the design requirement, and the second adjustment amount is reduced without further increasing the pressure so as to reduce the opening degree of the expansion valve.
In general, when the detected refrigerant pressure is less than the target refrigerant pressure, the second adjustment amount is a positive value to increase the opening degree of the expansion valve. When the detected refrigerant pressure is larger than or equal to the target refrigerant pressure, the second adjustment amount is a negative value so as to reduce the opening degree of the expansion valve.
Step S330: the opening degree of the expansion valve is determined based on the first adjustment amount and the second adjustment amount on the basis of the initial opening degree.
After the initial opening degree, the first adjustment amount, and the second adjustment amount are determined, the opening degree of the expansion valve is determined based on the initial opening degree, the first adjustment amount, and the second adjustment amount.
Specifically, the initial opening corresponds to a minimum oil return opening of the air conditioner, the first adjustment amount is determined by the detected discharge temperature, and the second adjustment amount is determined by the detected refrigerant pressure. The actual opening degree of the expansion valve is determined based on the weight of the influence of the first adjustment amount and the second adjustment amount on the opening degree.
That is, the actual opening = the initial opening + k1 × the first adjustment amount + k2 × the second adjustment amount. Wherein k1 is the weight of the influence of the first adjustment quantity on the opening degree, and k2 is the weight of the influence of the second adjustment quantity on the opening degree. By adjusting the weight, the optimal actual opening degree can be obtained, so that the aim of quickly refrigerating or heating is fulfilled on the basis of quickly finishing oil return as far as possible.
After the adjustment, the exhaust temperature and the refrigerant pressure can be obtained again, and the opening degree of the expansion valve is continuously corrected by using the second target exhaust temperature and the target refrigerant pressure.
In order to ensure normal oil return, after the step of step S110, before the step of step S120, the method further includes: and after the compressor finishes the preset time after oil return, performing the subsequent steps.
For example, after the air conditioner detects that oil return of the compressor is completed (after 3 minutes), that is, after the air conditioner determines the initial frequency and the initial opening degree, the air conditioner continuously operates for a period of time at the initial frequency and the initial opening degree, and after the oil return is stable, the air conditioner controls and obtains the exhaust temperature of the compressor and the refrigerant pressure of the heat exchanger so as to correct the working frequency of the compressor and the opening degree of the expansion valve. On one hand, when the compressor does not finish oil return, the operation of the compressor is unstable, and the error of correcting the air conditioner by using the exhaust temperature of the compressor and the refrigerant pressure of the heat exchanger is large. On the other hand, in order to ensure that the oil return is carried out quickly, before the oil return is not finished, the working frequency of the compressor and the opening degree of the expansion valve are not corrected so as to realize the purpose of quick refrigeration or heating.
The following describes a control system of the rapid cooling and heating mode provided by the embodiment of the present invention, and the control system of the rapid cooling and heating mode described below and the control method described above may be referred to correspondingly.
As shown in fig. 5, the control system of the rapid cooling and heating mode includes: an adjustment module 510, a first modification module 520, and a second modification module 530.
The adjusting module 510 is configured to adjust the compressor to an initial frequency and adjust the expansion valve to an initial opening degree when the air conditioner starts the fast cooling mode. The initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner. The first correction module 520 is configured to correct an operating frequency of the compressor based on an initial frequency based on a discharge temperature of the compressor. The second correcting module 530 is configured to correct the opening degree of the expansion valve based on the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
Fig. 6 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 6: a processor (processor) 610, a communication Interface (Communications Interface) 620, a memory (memory) 630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may call logic instructions in the memory 630 to perform the control method including: determining that the air conditioner is in a rapid refrigerating and heating mode, adjusting a compressor to an initial frequency, and adjusting an expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner; correcting an operating frequency of the compressor based on the initial frequency based on a discharge temperature of the compressor; and correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
It should be noted that, when being implemented specifically, the electronic device in this embodiment may be a server, a PC, or other devices, as long as the structure includes the processor 610, the communication interface 620, the memory 630, and the communication bus 640 shown in fig. 6, where the processor 610, the communication interface 620, and the memory 630 complete mutual communication through the communication bus 640, and the processor 610 may call the logic instruction in the memory 630 to execute the above method. The embodiment does not limit the specific implementation form of the electronic device.
In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Further, an embodiment of the present invention discloses a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, when the program instructions are executed by a computer, the computer can execute the control method provided by the above method embodiments, the control method includes: determining that the air conditioner is in a rapid refrigerating and heating mode, adjusting a compressor to an initial frequency, and adjusting an expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner; correcting an operating frequency of the compressor based on the initial frequency based on a discharge temperature of the compressor; and correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented when executed by a processor to perform the control method provided by each of the above embodiments, where the control method includes: determining that the air conditioner is in a rapid refrigerating and heating mode, adjusting a compressor to an initial frequency, and adjusting an expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner; correcting an operating frequency of the compressor based on the initial frequency based on a discharge temperature of the compressor; and correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A control method for a rapid refrigerating and heating mode is characterized by comprising the following steps:
determining that the air conditioner is in a rapid refrigerating and heating mode, adjusting a compressor to an initial frequency, and adjusting an expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner;
correcting an operating frequency of the compressor based on the initial frequency based on a discharge temperature of the compressor;
and correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
2. The method for controlling a rapid refrigeration heating mode according to claim 1, wherein the step of correcting the operating frequency of the compressor on the basis of the initial frequency based on the discharge temperature of the compressor comprises:
in the case that the discharge temperature is less than a first target discharge temperature, increasing the operating frequency of the compressor on the basis of the initial frequency;
and in the case that the exhaust temperature is greater than or equal to the first target exhaust temperature, reducing or maintaining the working frequency of the compressor on the basis of the initial frequency.
3. The control method for the rapid cooling and heating mode according to claim 2, wherein the first target discharge temperature is a discharge temperature corresponding to the compressor when the cooling or heating efficiency is the highest.
4. The control method for a rapid cooling and heating mode according to any one of claims 1 to 3, wherein the step of correcting the opening degree of the expansion valve based on the initial opening degree based on the discharge air temperature and the refrigerant pressure of the heat exchanger comprises:
determining a first adjustment amount of the expansion valve opening degree based on the exhaust gas temperature;
determining a second adjustment amount of the opening degree of the expansion valve based on the refrigerant pressure;
determining an opening degree of the expansion valve based on the first adjustment amount and the second adjustment amount on the basis of the initial opening degree.
5. The control method for a rapid cooling and heating mode according to claim 4, wherein the step of determining the first adjustment amount of the opening degree of the expansion valve based on the exhaust temperature comprises:
increasing the first adjustment amount in a case where the exhaust temperature is less than a second target exhaust temperature;
and when the exhaust temperature is greater than or equal to the second target temperature, reducing the first adjustment amount.
6. The method for controlling a rapid cooling and heating mode according to claim 5, wherein the step of determining the second adjustment amount of the opening degree of the expansion valve based on the refrigerant pressure comprises:
increasing the second adjustment amount under the condition that the refrigerant pressure is smaller than the target refrigerant pressure;
and reducing the second adjustment amount when the refrigerant pressure is greater than or equal to the target refrigerant pressure.
7. The method for controlling a rapid cooling and heating mode according to any one of claims 1-3, wherein after the steps of determining that the air conditioner is in the rapid cooling and heating mode, adjusting the compressor to an initial frequency, and adjusting the expansion valve to an initial opening degree, the step of correcting the operating frequency of the compressor based on the initial frequency further comprises:
and after the compressor finishes oil return for a preset time, performing subsequent steps.
8. A control system for a rapid cooling and heating mode, comprising:
the adjusting module is used for determining that the air conditioner is in a quick refrigerating and heating mode, adjusting the compressor to an initial frequency and adjusting the expansion valve to an initial opening degree; the initial frequency corresponds to the maximum oil return frequency of the air conditioner, and the initial opening corresponds to the minimum oil return opening of the air conditioner;
a first correction module for correcting the operating frequency of the compressor based on the initial frequency based on the discharge temperature of the compressor;
and the second correction module is used for correcting the opening degree of the expansion valve on the basis of the initial opening degree based on the exhaust temperature and the refrigerant pressure of the heat exchanger.
9. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a method for controlling a rapid cooling and heating mode according to any one of claims 1 to 7.
10. A computer program product, characterized in that it comprises a computer program stored on a non-transitory computer-readable storage medium, said computer program comprising program instructions which, when executed by a computer, the computer performs the control method of the rapid refrigeration heating mode as claimed in any one of claims 1 to 7.
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| CN202210928400.3A CN115540309A (en) | 2022-08-03 | 2022-08-03 | Control method and system for rapid cooling and heating mode, electronic device and medium |
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| CN202210928400.3A CN115540309A (en) | 2022-08-03 | 2022-08-03 | Control method and system for rapid cooling and heating mode, electronic device and medium |
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