CN115968167A - Control method and system of electronic expansion valve, storage medium and electronic equipment - Google Patents

Control method and system of electronic expansion valve, storage medium and electronic equipment Download PDF

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Publication number
CN115968167A
CN115968167A CN202211547848.7A CN202211547848A CN115968167A CN 115968167 A CN115968167 A CN 115968167A CN 202211547848 A CN202211547848 A CN 202211547848A CN 115968167 A CN115968167 A CN 115968167A
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China
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mode
expansion valve
electronic expansion
compression ratio
compressor
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Chinese (zh)
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王飞
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Suzhou Envicool Temperature Control Technology Co ltd
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Suzhou Envicool Temperature Control Technology Co ltd
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Priority to CN202211547848.7A priority Critical patent/CN115968167A/en
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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

Abstract

The embodiment of the invention discloses a control method of an electronic expansion valve, which comprises the following steps: determining the working mode of the air conditioner according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode; when the working mode is determined to be the refrigeration mode, controlling the opening degree of the electronic expansion valve according to the air suction superheat value; and when the working mode is determined to be the air pump heat pipe mode, controlling the opening degree of the electronic expansion valve according to the exhaust superheat value. The embodiment of the invention also discloses a control system of the electronic expansion valve, a computer readable storage medium and electronic equipment. The invention can adjust the working mode of the air conditioner according to different outdoor temperatures, further control the opening of the electronic expansion valve and achieve the effect of improving the reliability of the air conditioner.

Description

Control method and system of electronic expansion valve, storage medium and electronic equipment
Technical Field
The invention relates to the technical field of control of electronic expansion valves, in particular to a control method and a control system of an electronic expansion valve, a storage medium and electronic equipment.
Background
With the proposition and the promotion of a series of information engineering such as 'internet +', 'big data application' and the like, the scale and the quantity of data centers are rapidly developed and become power utilization big users of an information society. Data centers provide great convenience for the development of modern society, but air conditioning systems in the data centers which are always in an operating state consume a large amount of electricity. In order to reduce the energy consumption of a data center, an air conditioning system in which a compressor and an air pump are connected in parallel is available in the related art, the system operates in a refrigeration mode at a higher outdoor temperature, and the system operates in an air pump heat pipe mode at a low temperature.
In the process of implementing the present application, the inventors found that at least the following problems exist in the related art: when the operating environment of the air conditioning unit is extremely high or extremely low in temperature, in the control logic of the conventional electronic expansion valve, fixed opening degree adjustment is performed by given logic, and intelligent adjustment cannot be performed according to different outdoor environments and the requirements of an air conditioning system, so that the air conditioning unit fluctuates due to long-time operation of the electronic expansion valve under certain working conditions, and the reliability of the system is low.
Disclosure of Invention
Therefore, it is necessary to provide a control method, a control system, a storage medium, and an electronic device for an electronic expansion valve, which can adjust the operating mode of the air conditioner according to different outdoor temperatures, and further control the opening of the electronic expansion valve according to the operating mode, so as to achieve the effect of improving the reliability of the air conditioner.
A method of controlling an electronic expansion valve, the method comprising:
determining the working mode of the air conditioner according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode;
when the working mode is determined to be the refrigeration mode, controlling the opening degree of the electronic expansion valve according to the air suction superheat value;
and when the working mode is determined to be the air pump heat pipe mode, controlling the opening degree of the electronic expansion valve according to the exhaust superheat value.
Optionally, determining the operating mode of the air conditioner according to the outdoor temperature specifically includes:
when the outdoor temperature is greater than or equal to the preset temperature, determining that the working mode is a refrigeration mode;
and when the outdoor temperature is lower than the preset temperature, determining that the working mode is the air pump heat pipe mode.
Optionally, after determining the operation mode of the air conditioner according to the outdoor temperature, the method further includes:
and determining the compression ratio of the air conditioner compressor according to the working mode of the air conditioner.
Optionally, the compression ratio comprises a first compression ratio and a second compression ratio, the first compression ratio being greater than the second compression ratio;
according to the working mode of the air conditioner, the compression ratio of the air conditioner compressor is determined, and the method specifically comprises the following steps:
when the working mode is the refrigeration mode, determining the compression ratio as a first compression ratio;
and when the working mode is the air pump heat pipe mode, determining the compression ratio as a second compression ratio.
Optionally, when the operation mode is determined to be the cooling mode, controlling the opening degree of the electronic expansion valve according to the suction superheat value specifically includes:
controlling the compressor to operate according to the first compression ratio;
determining a suction superheat value after the compressor operates for a preset time;
the opening degree of the electronic expansion valve is controlled according to the suction superheat value.
Optionally, when the operation mode is determined to be the air pump heat pipe mode, controlling the opening of the electronic expansion valve according to the exhaust superheat value specifically includes:
controlling the compressor to operate according to the second compression ratio;
determining the exhaust superheat value after the compressor operates for a preset time;
and controlling the opening degree of the electronic expansion valve according to the exhaust superheat value.
Optionally, the air conditioning compressor has one exhaust port;
controlling the operation of the compressor according to the first compression ratio includes: controlling the exhaust port to exhaust at a first compression ratio; alternatively, the first and second liquid crystal display panels may be,
controlling the operation of the compressor according to the second compression ratio, comprising: the exhaust port is controlled to exhaust at the second compression ratio.
A control system for an electronic expansion valve, the system comprising:
the working mode determining module is used for determining the working mode of the air conditioner according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode;
the first opening degree determining module is used for controlling the opening degree of the electronic expansion valve according to the suction superheat value when the working mode is determined to be the refrigeration mode;
and the second opening determining module is used for controlling the opening of the electronic expansion valve according to the exhaust superheat value when the working mode is determined to be the air pump heat pipe mode.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of any of the methods described above.
An electronic device, comprising: a memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of any of the methods described above, and a processor.
By adopting the embodiment of the invention, the working mode of the air conditioner is determined according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode, the two modes of the air conditioner are controlled to work according to the outdoor temperature, and the corresponding working mode is selected at different temperatures, so that the stability of an air conditioning system is favorably maintained. And when the working mode is determined to be the refrigeration mode, controlling the opening degree of the electronic expansion valve according to the air suction superheat value, wherein the refrigeration mode is a main mode of the air conditioning system, and controlling the opening degree of the electronic expansion valve according to the air suction superheat value in the mode to enable the electronic expansion valve to work under the optimal opening degree, so that the stability of the air conditioning system in long-time running is maintained. And when the working mode is determined to be the air pump heat pipe mode, controlling the opening degree of the electronic expansion valve according to the exhaust superheat value. The air pump heat pipe mode is an energy-saving mode of the air conditioning system, and the opening degree of the electronic expansion valve is controlled through the exhaust superheat value in the air pump heat pipe mode, so that the electronic expansion valve works under the optimal opening degree, the air conditioner can be ensured to stably and reliably run under the low-temperature running condition, and the power consumption of the air conditioning system can be effectively reduced.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Wherein:
fig. 1 is a flowchart of a control method of an electronic expansion valve in a first embodiment of the invention;
fig. 2 is a schematic view of an internal structure of an air conditioner according to a first embodiment of the present invention;
FIG. 3 is a flowchart of step S101 according to the first embodiment of the present invention;
fig. 4 is a sub-flowchart of a control method of an electronic expansion valve in a second embodiment of the invention;
FIG. 5 is a flowchart of step S102 in the second embodiment of the present invention;
FIG. 6 is a flowchart of step S103 in the second embodiment of the present invention;
fig. 7 is a schematic structural view of a control system of the electronic expansion valve in the first embodiment of the invention;
fig. 8 is a schematic diagram of an internal structure of an electronic device according to a first embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1, which is a flowchart illustrating a control method of an electronic expansion valve according to a first embodiment of the present invention. The control method of the electronic expansion valve provided by the embodiment of the invention specifically comprises the following steps.
And S101, determining the working mode of the air conditioner according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode.
In this embodiment, the outdoor temperature is the current temperature of the environment in which the air conditioner is on-hook. Specifically, the temperature of the environment where the air conditioner outdoor unit is located is obtained by using a temperature sensor or an electronic thermometer provided on the air conditioner outdoor unit, for example, the current temperature obtained by the temperature sensor on the air conditioner outdoor unit is 20 ℃, that is, the outdoor temperature is 20 ℃. The air conditioner is a variable frequency machine room air conditioner, is also called a machine room air conditioner (IDC) for a Data Center, and is applied to an Internet Data Center. An air conditioning system of a data center machine room is an air conditioning system needing refrigeration throughout the year. Please refer to steps S1011-S1012.
The embodiment of the invention provides a compressor of an air conditioner with an air pump function and a compression refrigeration function, wherein the compressor has two different working modes, namely a refrigeration mode and an air pump heat pipe mode, and is provided with an air outlet. The discharge of gas is performed through the discharge port regardless of the mode in which the compressor is operated.
In some possible embodiments, a standard temperature is set, and when the outdoor temperature is greater than or equal to the standard temperature, the operation mode of the air conditioner is determined as the cooling mode, and when the outdoor temperature is less than the standard temperature, the operation mode of the air conditioner is determined as the air pump heat pipe mode, and particularly, the standard temperature setting may be 18 ℃. The numerical values mentioned in the present embodiment are only examples and are not limiting.
In some possible embodiments, the air conditioner compressor has one discharge port; controlling the operation of the compressor according to the first compression ratio includes: controlling the exhaust port to exhaust at a first compression ratio; or controlling the operation of the compressor according to the second compression ratio, comprising: the exhaust port is controlled to exhaust at the second compression ratio. In particular, in the embodiment of the invention, the air conditioner compressor is provided with the exhaust port, and when the air conditioner compressor operates in different modes, the exhaust port works under different compression ratios, so that the compressor of the air conditioner operates in the best state, and the stability of an air conditioning system is ensured.
And S102, controlling the opening of the electronic expansion valve according to the suction superheat value when the working mode is determined to be the cooling mode.
In the present embodiment, the cooling mode of the compressor is a normal operation mode of the compressor. Please refer to steps S1021 to S1023. Please refer to fig. 2, which is a schematic diagram of an internal structure of an air conditioner according to a first embodiment of the present invention. The air conditioner 2 includes a condenser 210, a compressor 220, an evaporator 230, and an electronic expansion valve 240. The Condenser 210 (Condenser), a component of a refrigeration system, is a type of heat exchanger that converts a gas or vapor into a liquid and transfers the heat from the tubes to the air in the vicinity of the tubes in a rapid manner. The evaporator 230 is a component of a refrigeration system, and the low-temperature condensed liquid exchanges heat with the outside air through the evaporator, is gasified and absorbs heat, and achieves the refrigeration effect. The evaporator 230 is mainly composed of two parts, a heating chamber and an evaporation chamber. The heating chamber provides heat required by evaporation for the liquid to promote the liquid to boil and vaporize; the evaporation chamber makes the gas phase and the liquid phase completely separated. The Electronic Expansion Valve 240 (EEV) adjusts the amount of liquid supplied to the evaporator according to a preset program, and is called an Electronic Expansion Valve because it is in an Electronic adjustment mode. The electronic expansion valve is a throttling element capable of entering the flow of the refrigerant of the refrigerating device according to a preset program, and has excellent characteristics incomparable to a thermal expansion valve.
The compressor functions to compress a driving refrigerant in a refrigerant circuit of the air conditioning system. The compressor extracts the refrigerant from the low-pressure area, compresses the refrigerant and then sends the compressed refrigerant to the high-pressure area for cooling and condensation, the heat is emitted to the air through the radiating fins, the refrigerant is changed from a gas state to a liquid state, the pressure is increased, at the moment, the suction superheat value of the compressor is obtained, and the most appropriate opening degree of the electronic expansion valve at present is determined according to the suction superheat value.
In particular, the suction superheat value refers to the temperature difference between the temperature value of the gas sucked by the compressor and the corresponding saturation temperature value at the corresponding pressure. I.e. suction superheat = saturation temperature for compressor suction temperature-evaporation pressure.
In some possible embodiments, the corresponding saturation temperature at the corresponding pressure is typically collected in the following ways when calculating the suction superheat value of the compressor: (1) collecting the temperature of an inlet of an evaporator; (2) collecting the temperature of the middle part of the evaporator; (3) Collecting the suction pressure of a compressor, and converting the suction pressure into corresponding saturation temperature; in the embodiment of the invention, the middle temperature of the evaporator is collected as the corresponding saturation temperature at the corresponding pressure. Subtracting the middle temperature of the evaporator of the air conditioner from the air suction temperature of the compressor of the air conditioner to obtain the air suction superheat value, namely, the air suction superheat value = the air suction temperature of the compressor-the middle temperature of the evaporator. It should be noted that, the specific manner of acquiring the corresponding saturation temperature under the corresponding pressure may be selected according to the actual situation, and the present application is not limited thereto.
The superheat plays a significant role in the normal operation of the expansion valve. If the suction is completely non-overheated, the return air and liquid can be generated, and even wet stroke liquid impact can damage the compressor. To avoid this, a certain degree of suction superheat is required to ensure that only dry vapor enters the compressor (the presence of superheat, depending on the refrigerant properties, indicates complete evaporation of the liquid refrigerant). However, too high degree of superheat also has the disadvantage that it causes the exhaust temperature (exhaust superheat) of the compressor to increase, and the compressor operation deteriorates and decreases in life.
The system can adjust the opening degree of the electronic expansion valve according to the suction superheat degree, and specifically, the opening degree of the electronic expansion valve is increased along with the increase of the suction superheat degree, and the opening degree of the electronic expansion valve is reduced along with the decrease of the suction superheat degree. The expansion valve is one of the key components of the refrigeration system, and the control quality of the opening degree of the expansion valve is the key for determining the quality of the refrigeration performance, so that the stability, the safety and the economy of the operation of the whole refrigeration system are greatly influenced. When the air conditioning unit operates in a refrigeration mode, the system controls the opening degree of the electronic expansion valve according to the suction superheat degree, so that the air conditioning unit can have good operation capacity and high energy efficiency, the system can have stable superheat degree through adjusting the electronic expansion valve, liquid return in the operation process of the system is prevented, the compressor is prevented from being damaged, and the stability of the air conditioning system in long-time operation is ensured.
And step S103, controlling the opening of the electronic expansion valve according to the exhaust superheat value when the working mode is determined to be the air pump heat pipe mode.
Refer to the stepsS1031-step S1033. In the present embodiment, the air pump heat pipe mode of the compressor is used in the energy saving mode in the present embodiment. Specifically, the compressor transfers the low temperature of the outside to the room through the medium by using the refrigerant in the evaporation tube as the medium, and at this time, the opening degree of the electronic expansion valve is properly increased according to the exhaust superheat value, thereby achieving the effect of cooling the room by using the outside temperature. Further, in the air pump heat pipe mode heat pump cycle of the compressor, Q is taken from the low temperature heat source 0 kcal/h heat, consumed mechanical work A L kcal/h, supplying Q to a high-temperature heat source 1 kcal/h, the relationship between these heats being in accordance with the first law of thermodynamics, i.e. Q 1 ＝Q 0 +A L kcal/h. The low temperature heat source includes outdoor air, circulating water or condensing agent of air conditioner.
Specifically, the discharge superheat degree refers to a temperature difference between a temperature of a discharge pipe of the compressor and a saturation temperature corresponding to the corresponding pressure. I.e. discharge superheat = saturation temperature for compressor discharge temperature-condensing pressure. When the exhaust superheat degree of the compressor is overlarge, the suction specific volume is increased, and the flow of the refrigerant is reduced; when the discharge superheat of the compressor is too small, liquid compression occurs, which not only degrades the performance of the air conditioner, but also causes the compressor to malfunction.
In some possible embodiments, when calculating the discharge superheat of the compressor, the corresponding saturation temperature at the corresponding pressure is generally collected as follows: (1) collecting the temperature of an outlet of a condenser; (2) collecting the temperature of the middle part of the condenser; (3) And collecting the exhaust pressure of the condenser, and converting into corresponding saturation temperature. In the embodiment of the invention, the temperature in the middle of the condenser is collected as the corresponding saturation temperature under the corresponding pressure, specifically, the temperature is collected through the temperature sensing bulb, and the exhaust superheat degree is obtained by subtracting the temperature of the condenser of the air conditioner from the exhaust temperature of the compressor, namely the exhaust superheat degree = the exhaust temperature of the compressor-the temperature of the condenser of the air conditioner. It should be noted that, in other embodiments, other two ways may also be adopted to acquire the corresponding saturation temperature at the corresponding pressure, which is not limited herein.
The system can acquire the exhaust superheat degree of the compressor and control the opening degree of the electronic expansion valve to be adjusted according to the exhaust superheat degree, specifically, the opening degree of the electronic expansion valve is reduced along with the increase of the exhaust superheat degree, and the opening degree of the electronic expansion valve is increased along with the decrease of the exhaust superheat degree. The system controls the opening degree of the electronic expansion valve according to the exhaust superheat degree, and can prevent liquid return and damage to the compressor in the operation process of the system, so that the stability of the air-conditioning system in long-time operation is ensured.
By adopting the embodiment of the invention, the working mode of the air conditioner is determined according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode, the two modes of the air conditioner are controlled to work according to the outdoor temperature, and the corresponding working mode is selected at different temperatures, so that the stability of an air conditioning system is favorably maintained. And when the working mode is determined to be the refrigeration mode, the opening degree of the electronic expansion valve is controlled according to the air suction superheat value, the refrigeration mode is a main mode of the air conditioning system, and the opening degree of the electronic expansion valve is controlled according to the air suction superheat value in the mode, so that the electronic expansion valve works under the optimal opening degree, and the stability of the air conditioning system in long-time running is maintained. And when the working mode is determined to be the air pump heat pipe mode, controlling the opening degree of the electronic expansion valve according to the exhaust superheat value. The air pump heat pipe mode is an energy-saving mode of the air conditioning system, and the exhaust superheat value is controlled to control the opening degree of the electronic expansion valve in the mode, so that the electronic expansion valve works under the optimal opening degree, the air conditioner can be ensured to stably and reliably run under the low-temperature running condition, and the power consumption of the air conditioning system can be effectively reduced.
Please refer to fig. 3, which is a flowchart of step S101 in the first embodiment. Step S101, determining an operating mode of the air conditioner according to the outdoor temperature, specifically including the following steps.
In step S1011, when the outdoor temperature is greater than or equal to the preset temperature, the operation mode is determined to be the cooling mode.
In step S1012, when the outdoor temperature is lower than the preset temperature, the operation mode is determined as the air pump heat pipe mode.
In the present embodiment, the preset temperature may be 15 ℃. Specifically, when the outdoor temperature acquired by the temperature sensor is 20 ℃, the operation mode is determined to be the cooling mode. And when the outdoor temperature acquired by the temperature sensor is 10 ℃, determining that the working mode is an air pump heat pipe mode. The numerical values mentioned in the present embodiment are only examples and are not limiting.
In the embodiment, in order to realize energy-saving operation of the air conditioner in the machine room, the compressor and the air pump are fused to obtain the compressor which is provided with the compressor and the air pump simultaneously, and the compressor realizes that the energy saving rate of the unit is greatly improved on the premise of hardly increasing the cost. Meanwhile, in order to protect the safe and stable operation of the system under different outdoor temperatures, different modes are adopted for controlling the opening degree of the expansion valve, and the electronic expansion valve is controlled to be at a reasonable opening degree based on the exhaust superheat degree or the suction superheat degree under different working modes, so that the reliability and the energy efficiency of the refrigeration equipment system under the severe working conditions can be particularly improved. And the power consumption of the air pump heat pipe mode is less than that of the refrigeration mode, so that the energy is further saved, and the further utilization of the external environment temperature resource is realized.
The control method of the electronic expansion valve provided in the second embodiment of the present invention is different from the control method of the electronic expansion valve provided in the first embodiment in that after the operation mode of the air conditioner is determined according to the outdoor temperature, the control method of the electronic expansion valve provided in the second embodiment further includes determining the compression ratio of the compressor of the air conditioner according to the operation mode of the air conditioner. Specifically, the compression ratio of the compressor refers to a value obtained by dividing the absolute pressure on the high pressure side of the compressor by the absolute pressure on the low pressure side. By selecting to control the operation of the compressor with different compression ratios, the functions of the compressor can be different, and the system can realize a refrigeration mode and an air pump heat pipe mode.
Please refer to fig. 4, which is a sub-flowchart of a control method of the electronic expansion valve according to a second embodiment of the present invention. In the present embodiment, the first compression ratio is larger than the second compression ratio. The method comprises the following steps of determining the compression ratio of an air conditioner compressor according to the working mode of the air conditioner.
In step S401, when the operation mode is the cooling mode, the compression ratio is determined to be the first compression ratio.
Specifically, when the compressor is in the cooling mode, the first compression ratio may be set to a value between 1.5 and 2.0. Further, when the compressor is in a cooling mode, the first compression ratio of the compressor is determined according to the outdoor temperature and the setting parameters of the air conditioning system. In the cooling mode, the compressor is in a normal operation state. The numerical values mentioned in the present embodiment are merely examples and are not limiting.
In step S402, when the operation mode is the air pump heat pipe mode, the compression ratio is determined to be the second compression ratio.
Specifically, when the compressor is in the air pump heat pipe mode, the second compression ratio is set to a value between 1.0 and 1.5. Further, when the compressor is in the air pump heat pipe mode, the second compression ratio of the compressor is determined according to the outdoor temperature and the setting parameters of the air conditioning system. In the air pump heat pipe mode, the power of the compressor is lower than the normal power, the compressor only enables air in a pipeline in the air conditioning system to circulate, and the power consumption is less than that in the normal working process.
In the above embodiment, the compressor with the air pump function is utilized, the compressor is provided with an exhaust port, the exhaust port can exhaust air under different compression ratios, when the working mode is the refrigeration mode, the compressor operates at the first compression ratio, and the exhaust port exhausts air under the first compression ratio; when the working mode is the air pump heat pipe mode, the compressor runs at the second compression ratio, and the exhaust port exhausts air at the second compression ratio. The compressor can run under different compression ratios, and when the outdoor temperature is lower, the indoor refrigeration work can be finished by using the lower compression ratio, so that the power consumption is reduced.
The first compression ratio is larger than the second compression ratio, so that the compressor running at the first compression ratio can be used as a compression cylinder to compress a refrigerant, thereby realizing refrigeration, and the second compression ratio is small, so that the compressor running at the second compression ratio can be used as an air pump cylinder; through the compression ratio of control compressor for the compressor can be regarded as compression cylinder or air pump jar and use, can save the required space of extra independent setting air pump, is favorable to the miniaturized design of equipment, can also reduce the cost.
Please refer to fig. 5, which is a flowchart illustrating step S102 according to a second embodiment of the present invention. Step S102, when the operation mode is determined as the cooling mode, controlling an opening degree of the electronic expansion valve according to a suction superheat value, specifically including the following steps.
And step S1021, controlling the compressor to operate according to the first compression ratio.
In step S1022, after the compressor is operated for a preset time, the suction superheat value is determined.
In step S1023, the opening of the electronic expansion valve is controlled based on the suction superheat value.
In the present embodiment, the compressor is controlled to operate for 20 minutes according to the first compression ratio. And obtaining the suction superheat value according to a preset suction superheat value calculation formula, and further controlling the opening degree of the electronic expansion valve according to the suction superheat value. For example, the suction superheat value at this time is SHA, and the opening degree of the electronic expansion valve obtained from SHA is 80%. The numerical values mentioned in the present embodiment are only examples and are not limiting. The compressor is operated at a higher first compression ratio, so that the rotating speed of the compressor is increased, and the rotating speed of the compressor is high in the refrigeration mode, and the suction superheat degree is adopted to sufficiently monitor the return liquid of the compressor, so that the compressor is controlled to operate at the first compression ratio in the refrigeration mode, and the opening degree of the electronic expansion valve is controlled according to the suction superheat degree, so that the return liquid can be avoided in the operation process of the system, the compressor is damaged, and the stability of the air conditioning system in long-time operation is ensured.
Please refer to fig. 6, which is a flowchart illustrating step S103 according to a second embodiment of the present invention. And S103, controlling the opening of the electronic expansion valve according to the exhaust superheat value when the working mode is determined to be the air pump heat pipe mode, wherein the method specifically comprises the following steps.
And step S1031, controlling the compressor to operate according to the second compression ratio.
In step S1032, after the compressor is operated for a preset time, an exhaust superheat value is determined.
Step S1033, controlling an opening degree of the electronic expansion valve according to the superheat value of the exhaust gas.
In the present embodiment, the compressor is controlled to operate for 20 minutes according to the second compression ratio. And obtaining the exhaust superheat value according to a preset exhaust superheat value calculation formula, and further controlling the opening degree of the electronic expansion valve according to the exhaust superheat value, wherein the exhaust superheat value is SHB, and the opening degree of the electronic expansion valve obtained according to the SHB is 90%. The numerical values mentioned in the present embodiment are only examples and are not limiting. Under the air pump heat pipe mode, the compressor (air pump) is pressed the operation with lower second, and the rotational speed of compressor is low, adjusts electronic expansion valve through adopting the exhaust superheat degree for the regulation precision is higher, and is more accurate, so guarantees that the air conditioner can reliable and stable operation under the low temperature operation condition.
In the above embodiment, the compressor and the air pump are integrated to obtain the compressor having both the compressor and the air pump, the air conditioning system operates in the refrigeration mode at a higher outdoor temperature, and the opening degree of the electronic expansion valve is controlled according to the suction superheat value SHA generated in the mode; the air-conditioning system operates the air pump heat pipe mode at a lower outdoor temperature, and controls the opening of the electronic expansion valve according to the exhaust superheat value SHB generated in the mode. Thereby realizing the utilization of an outdoor natural cold source and refrigerating indoors. Meanwhile, the opening degree of the electronic expansion valve is timely adjusted at different outdoor temperatures, so that the air-conditioning system is protected to operate safely and stably.
Please refer to fig. 7, which is a schematic structural diagram of a control system of an electronic expansion valve according to a first embodiment of the present invention. Specifically, the control system 800 of the electronic expansion valve includes an operating mode determination module 810, a first opening determination module 820, and a second opening determination module 830. Further, the working mode determining module 810 is configured to determine a working mode of the air conditioner according to the outdoor temperature, where the working mode includes a cooling mode and an air pump heat pipe mode. The first opening determination module 820 is used for controlling the opening of the electronic expansion valve according to the suction superheat value when the operation mode is determined to be the cooling mode. The second opening determination module 830 controls the opening of the electronic expansion valve according to the exhaust superheat value when it is determined that the operation mode is the air pump heat pipe mode.
Further, the operation mode determination module 810 determines the operation mode of the air conditioner according to an outdoor temperature, where the outdoor temperature is a current temperature of an environment where the air conditioner is externally hung. Specifically, the temperature of the environment where the air conditioner outdoor unit is currently located is obtained by using a temperature sensor or an electronic thermometer provided on the air conditioner outdoor unit, for example, the current temperature obtained by the temperature sensor on the air conditioner outdoor unit is 20 ℃, that is, the outdoor temperature is 20 ℃. The air conditioner is a variable frequency machine room air conditioner, is also called a machine room air conditioner (IDC) for a Data Center, and is applied to an Internet Data Center. An air conditioning system of a data center machine room is an air conditioning system needing refrigeration throughout the year.
The embodiment of the invention provides a compressor of an air conditioner integrating an air pump function and a compression refrigeration function. The discharge of gas is performed through the discharge port regardless of the mode in which the compressor is operated.
In some possible embodiments, a standard temperature is set, when the outdoor temperature is greater than or equal to the standard temperature, the operation mode of the air conditioner is determined as the cooling mode, and when the outdoor temperature is less than the standard temperature, the operation mode of the air conditioner is determined as the air pump heat pipe mode, and specifically, the standard temperature is set to 18 ℃. The numerical values mentioned in the present embodiment are only examples and are not limiting.
The first opening determination module 820 controls an opening of the electronic expansion valve according to a suction superheat value when the operation mode is determined to be the cooling mode.
The second opening determination module 830 controls the opening of the electronic expansion valve according to the exhaust superheat value when it is determined that the operation mode is the air pump heat pipe mode.
By adopting the embodiment of the invention, the working mode of the air conditioner is determined according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode, the two modes of the air conditioner are controlled to work according to the outdoor temperature, and the corresponding working mode is selected at different temperatures, so that the stability of an air conditioning system is favorably maintained. And when the working mode is determined to be the refrigeration mode, the opening degree of the electronic expansion valve is controlled according to the air suction superheat value, the refrigeration mode is a main mode of the air conditioning system, and the opening degree of the electronic expansion valve is controlled according to the air suction superheat value in the mode, so that the electronic expansion valve works under the optimal opening degree, and the stability of the air conditioning system in long-time running is maintained. And when the working mode is determined to be the air pump heat pipe mode, controlling the opening degree of the electronic expansion valve according to the exhaust superheat value. The air pump heat pipe mode is an energy-saving mode of the air conditioning system, and the opening degree of the electronic expansion valve is controlled by the exhaust superheat value in the mode, so that the electronic expansion valve works under the optimal opening degree, the power consumption of the air conditioning system can be effectively reduced, and the power consumption is reduced.
Optionally, the working mode determining module 810 is specifically configured to determine that the working mode is the cooling mode when the outdoor temperature is greater than or equal to a preset temperature; and when the outdoor temperature is lower than the preset temperature, determining that the working mode is the air pump heat pipe mode.
Optionally, the control system of the electronic expansion valve further comprises a compression ratio confirmation module, and the compression ratio confirmation module is configured to: and determining the compression ratio of the air conditioner compressor according to the working mode of the air conditioner.
Optionally, the compression ratio determining module is specifically configured to: when the working mode is the refrigeration mode, determining the compression ratio as the first compression ratio; and when the working mode is the air pump heat pipe mode, determining the compression ratio as the second compression ratio.
Optionally, the first opening determining module 820 is specifically configured to control the compressor to operate according to the first compression ratio; determining the suction superheat value after the compressor operates for a preset time; and controlling the opening degree of the electronic expansion valve according to the suction superheat value.
Optionally, the second opening degree determining module 830 is specifically configured to control the operation of the compressor according to the second compression ratio; determining the exhaust superheat value after the compressor operates for the preset time; and controlling the opening degree of the electronic expansion valve according to the exhaust superheat value.
Optionally, the first compression ratio of the electronic expansion valve control system is greater than the second compression ratio.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the above methods are implemented. The computer readable storage medium may be a magnetic medium, such as a floppy Disk, a hard Disk, a magnetic tape, an optical medium, such as a DVD, or a semiconductor medium, such as a Solid State Disk (SSD), among others. The computer-readable storage medium may also be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or other various media that can store computer programs. Further, a computer program of the control method of the electronic expansion valve described above, which can be loaded and executed by a processor, is stored on a computer-readable storage medium. The procedures or functions according to the embodiments of the invention are wholly or partly generated when the computer program is loaded and executed on a device. The electronic device provided with the computer-readable storage medium may be a wall-mounted air conditioner, a window type air conditioner, a ceiling type air conditioner, a cabinet type air conditioner, or a variable frequency machine room air conditioner. Since the computer-readable storage medium stores all technical solutions of all the above embodiments, at least all the advantages brought by the technical solutions of the above embodiments are achieved, and details are not described herein again.
The first embodiment of the present invention provides an electronic device 900, and specifically, the electronic device 900 includes a memory 910 and a processor 920. The electronic device 900 may be a wall-mounted air conditioner, a window air conditioner, a ceiling air conditioner, a cabinet air conditioner, or a variable frequency machine room air conditioner. Further, please refer to fig. 8 in combination, which is a schematic diagram of an internal structure of an electronic apparatus 900 according to a first embodiment of the present invention. The electronic device 900 includes a processor 920, memory 910, and a network interface 940 connected by a system bus 930. The memory 910 includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the electronic device 900 stores an operating system and may also store a computer program, which when executed by the processor 920, may cause the processor 920 to implement a method of controlling the electronic expansion valve. The internal memory 910 may also store a computer program that, when executed by the processor, causes the processor to perform a method for controlling the electronic expansion valve.
The memory 910 includes at least one type of computer-readable storage medium including flash memory, hard disks, multimedia cards, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disks, optical disks, and the like. The memory 910 may be an internal storage unit of the electronic device 900, such as a hard disk of the electronic device 900, in some embodiments. The memory 910 may also be an external storage device of the electronic device 900 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital Card (SD), a Flash memory Card (Flash Card), etc. provided on the electronic device 900. Further, the memory 910 may also include both internal storage units and external storage devices of the electronic device 900. The memory 910 may be used not only to store application software installed in the electronic apparatus 900 and various types of data, such as a computer program of a control method of the electronic expansion valve, etc., but also to temporarily store data that has been output or is to be output, such as data generated by execution of the control method of the electronic expansion valve, etc. Processor 920 may, in some embodiments, be a Central Processing Unit (CPU), controller, microcontroller, microprocessor or other data Processing chip that runs a computer program stored in memory 910 or processes data. In particular, the processor 920 executes a computer program of a control method of the electronic expansion valve to control the electronic device 900 to implement the control method of the electronic expansion valve.
Further, the electronic device 900 may further include a system bus 930 that may be a Peripheral Component Interconnect (PCI) standard bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but that does not indicate only one bus or one type of bus.
Further, the electronic device 900 may also include a display component (not shown). The display component may be an LED (Light Emitting Diode) display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch panel, or the like. The display component, which may also be referred to as a display device or display unit as appropriate, is used for displaying information processed in the electronic device 900 and for displaying a visualized user interface, among other things.
Further, the electronic device 900 may further include a communication component (not shown), which may optionally include a wired communication component and/or a wireless communication component (e.g., WI-FI communication component, bluetooth communication component, etc.), and is generally used for establishing a communication connection between the electronic device 900 and another device, for example, a communication connection between the electronic device 900 and a remote controller, or a communication connection between the electronic device 900 and a smartphone.
While fig. 8 shows only an electronic device 900 having components 910-940 and a computer program implementing climate control, those skilled in the art will appreciate that the configuration shown in fig. 8 is not limiting of electronic device 900 and may include fewer or more components than shown, or some components may be combined, or a different arrangement of components. Since the electronic device 900 adopts all technical solutions of all the embodiments described above, at least all the beneficial effects brought by the technical solutions of the embodiments described above are achieved, and are not described herein again.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, insofar as these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is intended to include these modifications and variations.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. A method of controlling an electronic expansion valve, the method comprising:
determining the working mode of the air conditioner according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode;
controlling the opening degree of the electronic expansion valve according to the suction superheat value when the working mode is determined to be the refrigeration mode;
and when the working mode is determined to be the air pump heat pipe mode, controlling the opening degree of the electronic expansion valve according to the exhaust superheat value.
2. The control method of the electronic expansion valve according to claim 1, wherein the determining the operation mode of the air conditioner according to the outdoor temperature specifically comprises:
when the outdoor temperature is greater than or equal to a preset temperature, determining that the working mode is the refrigeration mode;
and when the outdoor temperature is lower than the preset temperature, determining that the working mode is the air pump heat pipe mode.
3. The control method of the electronic expansion valve according to claim 2, further comprising, after the determining the operation mode of the air conditioner according to the outdoor temperature:
and determining the compression ratio of the air conditioner compressor according to the working mode of the air conditioner.
4. The control method of an electronic expansion valve according to claim 3, characterized in that the compression ratio includes a first compression ratio and a second compression ratio, the first compression ratio being larger than the second compression ratio;
the determining the compression ratio of the air conditioner compressor according to the working mode of the air conditioner specifically comprises:
when the working mode is the refrigeration mode, determining the compression ratio to be the first compression ratio;
and when the working mode is the air pump heat pipe mode, determining the compression ratio as the second compression ratio.
5. The control method of the electronic expansion valve according to claim 4, wherein the controlling the opening degree of the electronic expansion valve according to the suction superheat value when the operation mode is determined as the cooling mode specifically comprises:
controlling the compressor to operate according to the first compression ratio;
determining the suction superheat value after the compressor operates for a preset time;
and controlling the opening degree of the electronic expansion valve according to the suction superheat value.
6. The control method of the electronic expansion valve according to claim 4, wherein the controlling the opening degree of the electronic expansion valve according to the exhaust superheat value when the operation mode is determined to be the air pump heat pipe mode specifically comprises:
controlling the compressor to operate according to the second compression ratio;
determining the exhaust superheat value after the compressor operates for the preset time;
and controlling the opening degree of the electronic expansion valve according to the exhaust superheat value.
7. The control method of the electronic expansion valve according to claim 5 or 6, wherein the air conditioner compressor has an exhaust port;
the controlling the compressor operation according to the first compression ratio includes: controlling the exhaust port to exhaust at the first compression ratio; alternatively, the first and second liquid crystal display panels may be,
the controlling the compressor operation according to the second compression ratio includes: controlling the exhaust port to exhaust at the second compression ratio.
8. A control system for an electronic expansion valve, the system comprising:
the working mode determining module is used for determining the working mode of the air conditioner according to the outdoor temperature, wherein the working mode comprises a refrigeration mode and an air pump heat pipe mode;
the first opening degree determining module is used for controlling the opening degree of the electronic expansion valve according to the suction superheat value when the working mode is determined to be the refrigeration mode;
and the second opening determining module is used for controlling the opening of the electronic expansion valve according to the exhaust superheat value when the working mode is determined to be the air pump heat pipe mode.
9. A computer-readable storage medium, characterized in that the storage medium stores a computer program which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
10. An electronic device, comprising: a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method of any one of claims 1 to 7.
CN202211547848.7A 2022-12-05 2022-12-05 Control method and system of electronic expansion valve, storage medium and electronic equipment Pending CN115968167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211547848.7A CN115968167A (en) 2022-12-05 2022-12-05 Control method and system of electronic expansion valve, storage medium and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211547848.7A CN115968167A (en) 2022-12-05 2022-12-05 Control method and system of electronic expansion valve, storage medium and electronic equipment

Publications (1)

Publication Number Publication Date
CN115968167A true CN115968167A (en) 2023-04-14

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Country Status (1)

Country Link
CN (1) CN115968167A (en)

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