CN115031396A - Outdoor unit control method and device of air conditioning system, outdoor unit and air conditioning system - Google Patents

Outdoor unit control method and device of air conditioning system, outdoor unit and air conditioning system Download PDF

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Publication number
CN115031396A
CN115031396A CN202210741698.7A CN202210741698A CN115031396A CN 115031396 A CN115031396 A CN 115031396A CN 202210741698 A CN202210741698 A CN 202210741698A CN 115031396 A CN115031396 A CN 115031396A
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CN
China
Prior art keywords
temperature
outdoor unit
opening degree
expansion valve
electronic expansion
Prior art date
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Pending
Application number
CN202210741698.7A
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Chinese (zh)
Inventor
王军强
陈磊
邵艳坡
李健锋
许永锋
武运动
李东
李秦
梁科琳
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202210741698.7A priority Critical patent/CN115031396A/en
Publication of CN115031396A publication Critical patent/CN115031396A/en
Priority to PCT/CN2023/093010 priority patent/WO2024001534A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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 invention provides an outdoor unit control method and device of an air conditioning system, an outdoor unit and the air conditioning system, wherein the outdoor unit control method comprises the following steps: acquiring an environment parameter, an operation parameter of the outdoor unit and a first temperature of the refrigerant radiating pipe, wherein the operation parameter comprises a second temperature of the electronic control module; adjusting the opening degree of the electronic expansion valve according to the environmental parameter, the operation parameter and the first temperature so as to enable the temperature of the electronic control module to be within a preset range; according to the technical scheme of the embodiment of the invention, the heat generation of the electric control module can be reduced on the premise of not influencing the use effect of the air conditioning system.

Description

Outdoor unit control method and device of air conditioning system, outdoor unit and air conditioning system
Technical Field
The invention relates to the technical field of air conditioners, in particular to an outdoor unit control method and device of an air conditioning system, an outdoor unit and the air conditioning system.
Background
At present, frequency conversion multi-split air conditioning systems are increasingly popularized in the market, aiming at the global climate environment with overhigh extreme temperature, in order to widen the application range of high-temperature refrigeration of the multi-split air conditioning systems, more and more manufacturers gradually replace the air cooling heat dissipation technology with the refrigerant cooling heat dissipation technology to solve the problem of overhigh heat generation of an electric control module under the high-temperature refrigeration, and aiming at the refrigerant cooling design and control scheme adopted at present, for some extreme high-temperature working conditions, the electric control module still has the risk of overhigh heat generation for a long time, so that the service life of components and parts is accelerated and attenuated, in the prior art, the common mode is to solve the problem of the heat generation of the electric control module by reducing the frequency of a compressor, but the cooling and heat dissipation effect of the mode is still not good, the capacity output of the air conditioning system can be influenced, and the use effect of the air conditioning system is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an outdoor unit control method and device of an air conditioning system, an outdoor unit and the air conditioning system, which can reduce the heat generation of an electric control module on the premise of not influencing the use effect of the air conditioning system.
In a first aspect, an embodiment of the present invention provides a method for controlling an outdoor unit of an air conditioning system, where the outdoor unit includes an electronic expansion valve, an electronic control module, and a refrigerant heat dissipation tube for cooling the electronic control module, and the method includes:
acquiring an environment parameter, an operation parameter of the outdoor unit and a first temperature of the refrigerant radiating pipe, wherein the operation parameter comprises a second temperature of the electronic control module;
and adjusting the opening degree of the electronic expansion valve according to the environmental parameter, the operating parameter and the first temperature so as to enable the temperature of the electronic control module to be within a preset range.
The method for controlling the outdoor unit of the air conditioning system provided by the embodiment of the invention at least has the following beneficial effects: under the refrigeration mode, through obtaining the environmental parameter, the running parameter of off-premises station and the first temperature of refrigerant cooling tube, and according to the environmental parameter, the aperture of running parameter and first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the heating of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
In the above outdoor unit control method, the environment parameter includes an outdoor environment temperature, the operation parameter includes a condensing temperature of a condenser, and the adjusting the opening degree of the electronic expansion valve according to the environment parameter, the operation parameter, and the first temperature includes:
judging whether the electric control module has a heating risk or not according to the outdoor environment temperature and the second temperature;
under the condition that the heating risk exists, judging whether the refrigerant radiating pipe has the condensation risk or not according to the outdoor environment temperature and the first temperature;
and under the condition that the condensation risk does not exist, adjusting the opening degree of the electronic expansion valve according to the condensation temperature, wherein the condensation temperature is used for reflecting the pressure condition of the air conditioning system.
Whether the electronic control module has a heating risk or not can be judged according to the outdoor environment temperature and the second temperature, the heating risk exists when the electronic control module, whether the refrigerant radiating pipe has a condensation risk or not can be accurately judged according to the outdoor environment temperature and the first temperature, the condensation risk does not exist when the refrigerant radiating pipe, the opening degree of the electronic expansion valve is adjusted according to the condensation temperature, because the condensation temperature can reflect the pressure condition of the air conditioning system, the opening degree of the electronic expansion valve is adjusted on the premise of ensuring the working stability of the air conditioning system, namely, the electronic expansion valve is enabled to play the functions of throttling and cooling within a controllable range, the temperature of the refrigerant can be effectively reduced, and the efficient heat exchange between the refrigerant radiating pipe and the electronic control module is ensured.
In the above outdoor unit control method, the determining whether the electronic control module has a risk of heating according to the outdoor environment temperature and the second temperature includes:
when the outdoor environment temperature is greater than or equal to a first preset value and the second temperature is greater than or equal to a second preset value, judging that the electric control module has a heating risk; otherwise, the electronic control module is judged to have no heating risk.
Under the refrigeration mode, when detecting that outdoor environment temperature is greater than or equal to first default, indicate that electronic control module work is under the high temperature operating mode, then get into high temperature heat dissipation function, simultaneously when detecting that the second temperature is greater than or equal to the second default, then think that electronic control module high temperature, judge that electronic control module has the risk of generating heat to whether further judge the refrigerant cooling tube and appear the condensation risk, under the condition that does not have the condensation risk, adjust electronic expansion valve's aperture according to the condensation temperature.
In the method for controlling the outdoor unit, the determining whether the refrigerant radiating pipe has a condensation risk according to the outdoor environment temperature and the first temperature includes:
calculating a temperature difference between the outdoor ambient temperature and the first temperature;
when the temperature difference value is larger than a third preset value, judging that the refrigerant radiating pipe has a condensation risk; otherwise, judging that the refrigerant radiating pipe does not have condensation risk.
Through obtaining outdoor ambient temperature and first temperature, calculate the temperature difference of outdoor ambient temperature and first temperature, be greater than the third default when the temperature difference, it crosses lowly to show the refrigerant temperature, make the surface temperature of refrigerant cooling tube than outdoor ambient temperature easily low, thereby cause the surface of refrigerant cooling tube to produce the condensation, then judge that there is the condensation risk in the refrigerant cooling tube, if the surface of refrigerant cooling tube produces the condensation, touch electronic components of electronic control module easily, thereby make the condition of electronic control module short circuit, influence the reliability of electronic control module work, be less than or equal to the third default when the temperature difference, judge that there is not the condensation risk in the refrigerant cooling tube, adjust electronic expansion valve's aperture according to condensation temperature again, guarantee the reliability of air conditioning system work.
In the above outdoor unit control method, the adjusting the opening degree of the electronic expansion valve according to the condensation temperature includes:
and when the condensation temperature is less than or equal to a fourth preset value, reducing the opening degree of the electronic expansion valve.
It should be noted that, when the condensing temperature is less than or equal to the fourth preset value, and it indicates that the pressure of the air conditioning system is within the normal range, it is considered that there is no risk of reducing the opening degree of the electronic expansion valve to cause over-pressure, at this time, a control measure for reducing the opening degree of the electronic expansion valve may be executed, the temperature of the refrigerant may be effectively reduced by using the throttling and cooling effects of the electronic expansion valve, and by cooling the electronic control module with a refrigerant with a lower temperature, the heat dissipation effect of the refrigerant may be effectively improved, and the heat generated by the electronic control module may be reduced, so that the temperature of the electronic control module is within the preset range.
In the above outdoor unit control method, the operating parameter further includes a first opening degree of the electronic expansion valve in a current state, and the reducing the opening degree of the electronic expansion valve includes:
determining a second opening degree according to the first opening degree and a fifth preset value, wherein the fifth preset value is a coefficient smaller than 1;
reducing the opening degree of the electronic expansion valve from the first opening degree to the second opening degree.
It should be noted that, by obtaining the first opening degree of the electronic expansion valve in the current state, when the condensing temperature is less than or equal to the fourth preset value, the second opening degree is obtained by calculation according to the first opening degree and the fifth preset value, the second opening degree is less than the first opening degree, the opening degree of the electronic expansion valve is reduced from the first opening degree to the second opening degree, and the temperature of the refrigerant is effectively reduced by using the throttling and cooling effects of the electronic expansion valve.
In the above outdoor unit control method, further comprising:
when a preset condition is met, maintaining the opening degree of the electronic expansion valve;
wherein the preset condition comprises at least one of:
the second temperature is less than a second preset value;
the temperature difference between the outdoor ambient temperature and the first temperature is greater than a third preset value;
the condensing temperature is greater than a fourth preset value.
It should be noted that, when the preset condition is met, the opening degree of the electronic expansion valve is maintained, that is, the adjusting action of the electronic expansion valve is not performed, specifically, when the second temperature is less than the second preset value, which indicates that the temperature of the electronic control module is within the risk controllable range, it is determined that the electronic control module does not have a heating risk, the opening degree of the electronic expansion valve is maintained, when the temperature difference between the outdoor environment temperature and the first temperature is greater than a third preset value, it is determined that the refrigerant radiating pipe has a condensation risk, the opening degree of the electronic expansion valve is maintained, the condition that condensation occurs on the surface of the refrigerant radiating pipe due to the fact that the temperature of the refrigerant is too low by adjusting the opening degree of the electronic expansion valve is reduced, when the condensation temperature is greater than a fourth preset value, which indicates that the pressure of the air conditioning system is relatively high, the opening degree of the electronic expansion valve is maintained, and the condition that the pressure is too high due to reducing the opening degree of the electronic expansion valve is reduced, the working reliability of the air conditioning system can be ensured.
In the above outdoor unit control method, further comprising:
and when the electronic expansion valve operates at the second opening degree for a preset time, the environmental parameters, the operating parameters and the first temperature are obtained again.
It should be noted that, when the opening degree of the electronic expansion valve is reduced to the second opening degree, the air conditioning system continuously operates for a preset time, so as to ensure the stable reliability of the operation of the air conditioning system, and after the operation for the preset time, the environmental parameter, the operating parameter and the first temperature are obtained again, and the opening degree of the electronic expansion valve is adjusted again according to the environmental parameter, the operating parameter and the first temperature, so that the operating state of the electronic expansion valve can be adjusted in real time, the temperature of the electronic control module is ensured to be within a preset range, and the flexibility and the accuracy of the control are improved.
In a second aspect, an embodiment of the present invention provides an operation control apparatus, including at least one control processor and a memory, which is communicatively connected to the at least one control processor; the memory stores instructions executable by the at least one control processor, the instructions being executable by the at least one control processor to enable the at least one control processor to perform the outdoor unit control method according to the first aspect.
The operation control device provided by the embodiment of the invention at least has the following beneficial effects: under the refrigeration mode, through obtaining the environmental parameter, the operating parameter of off-premises station and the first temperature of refrigerant cooling tube to according to environmental parameter, operating parameter and the aperture of first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the generating heat of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
In a third aspect, an embodiment of the present invention provides an outdoor unit, including the operation control device as described in the second aspect.
The outdoor unit provided by the embodiment of the invention at least has the following beneficial effects: under the refrigeration mode, through obtaining the environmental parameter, the running parameter of off-premises station and the first temperature of refrigerant cooling tube, and according to the environmental parameter, the aperture of running parameter and first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the heating of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
In a fourth aspect, an embodiment of the present invention provides an air conditioning system, including the outdoor unit and at least one indoor unit as described in the embodiment of the third aspect, where the outdoor unit and the indoor unit are connected.
The air conditioning system provided by the embodiment of the invention at least has the following beneficial effects: under the refrigeration mode, through obtaining the environmental parameter, the running parameter of off-premises station and the first temperature of refrigerant cooling tube, and according to the environmental parameter, the aperture of running parameter and first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the heating of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are configured to cause a computer to perform the outdoor unit control method according to the first aspect.
The computer-readable storage medium provided by the embodiment of the invention has at least the following beneficial effects: under the refrigeration mode, through obtaining the environmental parameter, the running parameter of off-premises station and the first temperature of refrigerant cooling tube, and according to the environmental parameter, the aperture of running parameter and first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the heating of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a flowchart of an outdoor unit control method according to an embodiment of the present invention.
Fig. 2 is a flowchart of an outdoor unit control method according to a second embodiment of the present invention;
fig. 3 is a flowchart of an outdoor unit control method according to a third embodiment of the present invention;
fig. 4 is a flowchart of an outdoor unit control method according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of an outdoor unit control method according to a fifth embodiment of the present invention;
fig. 6 is a flowchart of an outdoor unit control method according to a sixth embodiment of the present invention;
fig. 7 is a flowchart of an outdoor unit control method according to a seventh embodiment of the present invention;
fig. 8 is an overall flowchart of an outdoor unit control method according to an eighth embodiment of the present invention;
fig. 9 is a schematic structural diagram of an operation control apparatus according to a ninth embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
It should be understood that in the description of the embodiments of the present invention, if there is any description of "first", "second", etc., it is only for the purpose of distinguishing technical features, and it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features. "at least one" means one or more, "a plurality" means two or more, greater than, less than, greater than, and the like, without the inclusion of a number, and greater than, less than, and the like, with the inclusion of a number, and "a number" means one or more, unless specifically limited otherwise. "and/or" describes the association relationship of the associated objects, and means that there can be three relationships, it is understood that a and/or B can mean the case where a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural.
Furthermore, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, as meaning, for example, that it can be a fixed or movable connection, a removable or non-removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; may be directly connected or indirectly connected through an intermediate. It should be noted that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different from that in the flowcharts.
It should be noted that the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
According to the outdoor unit control method and device of the air conditioning system, the outdoor unit and the air conditioning system, the heating of the electric control module can be reduced on the premise that the using effect of the air conditioning system is not influenced.
The embodiments of the present invention will be further explained with reference to the drawings.
The air conditioning system provided by the embodiment of the invention can comprise an outdoor unit and an indoor unit, wherein the outdoor unit is provided with an electronic expansion valve, an electronic control module and a refrigerant radiating pipe, the electronic control module can control the working state of the air conditioning system, for example, the air conditioning system is controlled to operate in a refrigeration mode, the refrigerant radiating pipe is used for cooling the electronic control module, specifically, the outdoor unit is provided with a radiator, for example, an aluminum plate, the electronic control module and the refrigerant radiating pipe are respectively arranged on two sides of the radiator, heat generated by the electronic control module can be transferred to the refrigerant radiating pipe through the radiator, and liquid refrigerant with lower temperature can take away the heat through the refrigerant radiating pipe, so that the effective heat dissipation of the electronic control module is realized.
As shown in fig. 1, based on the air conditioning system, an embodiment of the first aspect of the present invention provides a method for controlling an outdoor unit of an air conditioning system, including, but not limited to, step S110 and step S120:
step S110: the method comprises the steps of obtaining environmental parameters, operation parameters of an outdoor unit and first temperatures of refrigerant radiating pipes, wherein the operation parameters comprise second temperatures of an electric control module.
It should be noted that the environment parameter may include, but is not limited to, an outdoor environment temperature, an outdoor environment humidity, and other applicable parameters, the operation parameter of the outdoor unit may include, but is not limited to, a second temperature of the electronic control module, a condensing temperature of the condenser, an opening degree of the electronic expansion valve, a rotation speed of the outdoor fan, and other applicable parameters, the first temperature is an inlet temperature of the refrigerant heat dissipation pipe, and by obtaining the environment parameter and the operation parameter of the outdoor unit, a working condition of the outdoor unit in a current state may be reflected, and at the same time, a first temperature of the refrigerant heat dissipation pipe is obtained, and a condensation risk condition of the refrigerant heat dissipation pipe in the current state may be reflected by combining the environment parameter.
Specifically, temperature sensors may be disposed on the refrigerant heat dissipation pipe and the electronic control module to obtain the first temperature and the second temperature.
Step S120: and adjusting the opening degree of the electronic expansion valve according to the environmental parameters, the operating parameters and the first temperature so as to enable the temperature of the electronic control module to be within a preset range.
When the air conditioning system operates in a refrigeration mode, the environmental parameters, the operating parameters and the first temperature are acquired, the opening degree of the electronic expansion valve is adaptively adjusted through self-detection of the outdoor unit, specifically, the opening degree of the electronic expansion valve can be adjusted to be reduced or increased, the electronic expansion valve is used for throttling and cooling in a controllable range through coupling control of the environmental parameters, the operating parameters, the first temperature and the electronic expansion valve, the cooling effect of refrigerant heat dissipation can be effectively improved on the basis of not increasing the cost, and the service life of electronic components is prolonged.
It should be noted that the preset range is a safe temperature range of the electronic control module, the preset ranges of different electronic control modules are different, and when the temperature of the electronic control module is within the preset range, the working reliability of the electronic control module is high, and the working stability of the air conditioning system can be ensured.
In the outdoor unit control method of the air conditioning system according to the first aspect of the present disclosure, in the cooling mode, the environment parameter, the operation parameter of the outdoor unit, and the first temperature of the cooling pipe of the refrigerant are obtained, the opening of the electronic expansion valve is adjusted according to the environment parameter, the operation parameter, and the first temperature, and through self-detection and coupling control of the outdoor unit, the electronic expansion valve of the outdoor unit is utilized to throttle and cool within a controllable range, so as to ensure capacity output of the air conditioning system, reduce heat generation of the electronic control module on the premise of not affecting the use effect of the air conditioning system, and facilitate improvement of the use experience of a user.
In the prior art, aiming at the currently adopted refrigerant cooling design and control scheme, when an air conditioning system is in a refrigeration mode, throttling and pressure reduction are mainly carried out by an electronic expansion valve of an indoor unit to realize evaporation heat exchange, the electronic expansion valve of the outdoor unit is kept constant, the temperature of a refrigerant entering a refrigerant radiating pipe only depends on the condensation effect of a condenser, for some extreme high-temperature working conditions, an electronic control module still has the risk of high long-time heating, the service life of components can also accelerate attenuation loss, if the problem of heating of the electronic control module is solved by reducing the frequency of a compressor, the use effect of the air conditioning system can be greatly reduced, and the outdoor unit control method of the air conditioning system is different from the control scheme in the prior art, and the outdoor unit self-judges environmental parameters, operation parameters and first temperature so as to adaptively regulate the opening degree of the electronic expansion valve, the opening degree of the electronic expansion valve of the outdoor unit is adjusted within the controllable range, so that the electronic expansion valve of the outdoor unit plays a throttling role and is matched with the electronic expansion valve of the indoor unit, the cold output of the air-conditioning system is not affected, and the good use effect of the air-conditioning system can be ensured. Specifically, the temperature of the refrigerant can be effectively reduced by reducing the opening degree of the electronic expansion valve of the outdoor unit, so that the heat exchange effect can be improved.
As shown in fig. 2, in the above outdoor unit control method, the environment parameter includes an outdoor environment temperature, the operation parameter includes a condensing temperature of the condenser, and the step S120 adjusts the opening degree of the electronic expansion valve according to the environment parameter, the operation parameter and the first temperature, including but not limited to the steps S210 to S230:
step S210: judging whether the electric control module has a heating risk according to the outdoor environment temperature and the second temperature;
step S220: under the condition that the heating risk exists, judging whether the condensation risk exists in the refrigerant radiating pipe according to the outdoor environment temperature and the first temperature;
step S230: and under the condition that the condensation risk does not exist, the opening degree of the electronic expansion valve is adjusted according to the condensation temperature, wherein the condensation temperature is used for reflecting the pressure condition of the air conditioning system.
It should be noted that the condensing temperature is the middle temperature of the condenser, and a temperature sensor may be disposed at a corresponding position to obtain the condensing temperature and the outdoor ambient temperature.
The outdoor environment temperature can reflect the working condition temperature of the electric control module in the current state, the second temperature can reflect the working temperature of the electric control module, whether the electric control module has a heating risk or not can be judged according to the outdoor environment temperature and the second temperature, the heating risk or not can be judged when the electric control module has the heating risk, whether the refrigerant radiating pipe has a condensation risk or not can be accurately judged according to the outdoor environment temperature and the first temperature, the condensation risk does not exist when the refrigerant radiating pipe, the opening degree of the electronic expansion valve is adjusted according to the condensation temperature, the pressure condition of the air conditioning system can be reflected due to the condensation temperature, the opening degree of the electronic expansion valve is adjusted on the premise of ensuring the working stability of the air conditioning system, namely, the electronic expansion valve is enabled to play the throttling and cooling effects in a controllable range, the refrigerant temperature can be effectively reduced, and the efficient heat exchange between the refrigerant radiating pipe and the electric control module is ensured.
It can be understood that, under the condition that there is the risk of generating heat at electric control module, through judging whether there is the condensation risk in the refrigerant cooling tube, adjust electronic expansion valve's aperture according to condensation temperature again under the condition that does not have the condensation risk, reduce to appear because of the refrigerant temperature crosses low the condition that makes refrigerant cooling tube surface produce the comdenstion water and cause electric control module short circuit, can guarantee electric control module's operational reliability, can judge whether too high under the current condition air conditioning system's pressure through condensation temperature, adjust electronic expansion valve's aperture according to condensation temperature, reduce and appear because of adjusting electronic expansion valve's aperture and cause the too high condition of pressure, guarantee that whole air conditioning system works in the safe and reliable scope, be favorable to improving the accurate nature of control.
As shown in fig. 3, in the outdoor unit control method, the step S210 of determining whether the electronic control module has a heat generation risk according to the outdoor environment temperature and the second temperature includes:
step S310: when the outdoor environment temperature is greater than or equal to a first preset value and the second temperature is greater than or equal to a second preset value, judging that the electric control module has a heating risk; otherwise, the electronic control module is judged to have no heating risk.
Under the refrigeration mode, when detecting that outdoor environment temperature is greater than or equal to first default, indicate that electronic control module work is under the high temperature operating mode, then get into high temperature heat dissipation function, simultaneously when detecting that the second temperature is greater than or equal to the second default, then think that electronic control module high temperature, judge that electronic control module has the risk of generating heat to whether further judge the refrigerant cooling tube and appear the condensation risk, under the condition that does not have the condensation risk, adjust electronic expansion valve's aperture according to the condensation temperature. It should be noted that when it is detected that the outdoor environment temperature is greater than or equal to the first preset value, the damper of the outdoor fan is kept at the highest level, the refrigerant flow is relatively stable, the opening degree of the electronic expansion valve is adjusted under a steady-state condition, and the throttling and cooling effects of the electronic expansion valve of the outdoor unit can be effectively exerted.
It should be noted that when the outdoor ambient temperature is less than the first preset value, it indicates that the electronic control module operates in a proper temperature range, and does not need to enter a high-temperature heat dissipation function, and when the outdoor ambient temperature is greater than or equal to the first preset value and the second temperature is less than the second preset value, it indicates that the temperature of the electronic control module is in a range in which the risk is controllable, and it is determined that the electronic control module does not have a heating risk, and the reliability of the operation of the electronic control module can be ensured.
As shown in fig. 4, in the outdoor unit control method, the step S220 determines whether there is a condensation risk in the refrigerant heat dissipation pipe according to the outdoor environment temperature and the first temperature, which includes, but is not limited to, the steps S410 and S420:
step S410: calculating a temperature difference between the outdoor ambient temperature and the first temperature;
step S420: when the temperature difference value is larger than a third preset value, judging that the cooling medium radiating pipe has a condensation risk; otherwise, judging that the cooling medium radiating pipe does not have the condensation risk.
Through acquireing outdoor ambient temperature and first temperature, calculate the temperature difference of outdoor ambient temperature and first temperature, be greater than the third default when the temperature difference, it is low excessively to show the refrigerant temperature, make the surface temperature of refrigerant cooling tube than outdoor ambient temperature easily, thereby cause the surface of refrigerant cooling tube to produce the condensation, then judge that there is the condensation risk in refrigerant cooling tube, if the surface of refrigerant cooling tube produces the condensation, touch electronic components of automatically controlled module easily, thereby make the condition of automatically controlled module short circuit, influence the reliability of automatically controlled module work, be less than or equal to the third default when the temperature difference, it does not have the condensation risk to judge the refrigerant cooling tube, adjust electronic expansion valve's aperture according to condensation temperature again, guarantee the reliability of air conditioning system work.
As shown in fig. 5, in the outdoor unit control method, the adjusting the opening degree of the electronic expansion valve according to the condensing temperature in step S230 includes:
step S510: and when the condensing temperature is less than or equal to a fourth preset value, reducing the opening degree of the electronic expansion valve.
It should be noted that, when the condensing temperature is less than or equal to the fourth preset value, and it indicates that the pressure of the air conditioning system is within the normal range, it is considered that there is no risk of reducing the opening degree of the electronic expansion valve to cause over-pressure, at this time, a control measure for reducing the opening degree of the electronic expansion valve may be executed, the temperature of the refrigerant may be effectively reduced by using the throttling and cooling effects of the electronic expansion valve, and by cooling the electronic control module with a refrigerant with a lower temperature, the heat dissipation effect of the refrigerant may be effectively improved, and the heat generated by the electronic control module may be reduced, so that the temperature of the electronic control module is within the preset range.
It can be understood that, in the outdoor unit control method according to the embodiment of the present invention, the opening degree of the electronic expansion valve of the outdoor unit is reduced within the controllable range, so that the electronic expansion valve of the outdoor unit can play a throttling role, the temperature of the refrigerant entering the refrigerant heat dissipation pipe can be effectively reduced, and the heat exchange effect of the refrigerant is fully exerted.
As shown in fig. 6, in the above-mentioned outdoor unit control method, the operation parameters further include a first opening degree of the electronic expansion valve in the current state, and the opening degree of the electronic expansion valve is decreased in step S510, including but not limited to step S610 and step S620:
step S610: determining a second opening degree according to the first opening degree and a fifth preset value, wherein the fifth preset value is a coefficient smaller than 1;
step S620: the opening degree of the electronic expansion valve is decreased from the first opening degree to the second opening degree.
It should be noted that, by obtaining the first opening degree of the electronic expansion valve in the current state, when the condensing temperature is less than or equal to the fourth preset value, the second opening degree is obtained by calculation according to the first opening degree and the fifth preset value, the second opening degree is less than the first opening degree, and the opening degree of the electronic expansion valve is reduced from the first opening degree to the second opening degree, and the temperature of the refrigerant is effectively reduced by using the throttling and cooling effects of the electronic expansion valve.
In an embodiment, if the air conditioning system is just started, an initial opening degree of the air conditioning system when the air conditioning system is started is a first opening degree, and the initial opening degree is usually a maximum opening degree of the electronic expansion valve, the opening degree of the electronic expansion valve is reduced from the maximum opening degree to a second opening degree, and if the air conditioning system is started for a period of time, the opening degree of the electronic expansion valve may have been reduced, that is, the first opening degree in the current state may be smaller than the maximum opening degree, the first opening degree is reduced to the second opening degree, and a fifth preset value may be set according to actual conditions.
In the above outdoor unit control method, further comprising the steps of:
when the preset condition is met, keeping the opening degree of the electronic expansion valve;
wherein the preset condition comprises at least one of the following conditions:
the second temperature is lower than a second preset value;
the temperature difference between the outdoor environment temperature and the first temperature is greater than a third preset value;
the condensing temperature is greater than a fourth preset value.
It should be noted that, when the preset condition is met, the opening degree of the electronic expansion valve is maintained, that is, the adjusting action of the electronic expansion valve is not performed, specifically, when the second temperature is less than the second preset value, which indicates that the temperature of the electronic control module is within the risk controllable range, it is determined that the electronic control module does not have a heating risk, the opening degree of the electronic expansion valve is maintained, when the temperature difference between the outdoor environment temperature and the first temperature is greater than a third preset value, it is determined that the refrigerant radiating pipe has a condensation risk, the opening degree of the electronic expansion valve is maintained, the condition that condensation occurs on the surface of the refrigerant radiating pipe due to the fact that the temperature of the refrigerant is too low by adjusting the opening degree of the electronic expansion valve is reduced, when the condensation temperature is greater than a fourth preset value, which indicates that the pressure of the air conditioning system is relatively high, the opening degree of the electronic expansion valve is maintained, and the condition that the pressure is too high due to reducing the opening degree of the electronic expansion valve is reduced, the working reliability of the air conditioning system can be ensured.
In an embodiment, when a preset condition is met, after the opening of the electronic expansion valve is kept running for a preset time, the environmental parameter, the running parameter and the first temperature are obtained again, the running state of the electronic expansion valve can be adjusted in real time, and the temperature of the electronic control module is ensured to be within a preset range.
As shown in fig. 7, the outdoor unit control method further includes the following steps:
step S710: and when the electronic expansion valve operates at the second opening degree for a preset time, the environmental parameters, the operating parameters and the first temperature are acquired again.
It should be noted that, when the opening degree of the electronic expansion valve is reduced to the second opening degree, the air conditioning system continuously operates for a preset time, so as to ensure the stable reliability of the operation of the air conditioning system, and after the operation for the preset time, the environmental parameter, the operating parameter and the first temperature are obtained again, and the opening degree of the electronic expansion valve is adjusted again according to the environmental parameter, the operating parameter and the first temperature, so that the operating state of the electronic expansion valve can be adjusted in real time, the temperature of the electronic control module is ensured to be within a preset range, and the flexibility and the accuracy of the control are improved.
In order to more clearly illustrate the outdoor unit control method of the present invention, an overall embodiment will be further described below.
As shown in fig. 8, the outdoor unit control method of the present invention specifically includes:
1. in a cooling mode;
2. detecting an outdoor environment temperature T4, a condensing temperature T3b of a condenser, a first temperature TL of a refrigerant radiating pipe, a second temperature IPM of an electric control module and a first opening EXV1 of an electronic expansion valve in the current state of the outdoor unit;
3. comparing the size of T4 with A; if T4 is more than or equal to A, entering a high-temperature heat dissipation mode, and executing a step 4; if T4 is less than A, the high-temperature heat dissipation mode is exited; wherein A is a first preset value;
4. comparing the size of IPM and B; if IPM is more than or equal to B, executing the step 5; if IPM is less than B, keeping the opening degree of the electronic expansion valve, namely EXV1, and executing step 8; wherein B is a second preset value;
5. comparing the size of T4-TL with that of C; if T4-TL is less than or equal to C, executing step 6; if T4-TL > C, EXV1 remains unchanged, go to step 8; wherein C is a third preset value;
6. comparing the magnitude of T3b with D; if T3b is less than or equal to D, executing step 7; if T3b > D, EXV1 remains unchanged, go to step 8; wherein D is a fourth preset value;
7. EXV2 ═ K1 × EXV 1; decreasing the opening degree of the electronic expansion valve from the first opening degree EXV1 to a second opening degree EXV2, and performing step 8; wherein K1 is a fifth preset value;
8. after t time of operation, returning to the step 2; wherein t is a preset time.
It should be noted that the first preset value, the second preset value, the third preset value, the fourth preset value and the fifth preset value are set according to actual requirements of the air conditioning system, and the embodiment of the present invention is not particularly limited.
The outdoor unit control method provided by this embodiment, when the outdoor environment temperature is greater than or equal to the first preset value, enter the high temperature heat dissipation mode, if the second temperature is detected to be greater than or equal to the second preset value, determine that the electronic control module has a heat generation risk, at this time, determine whether a temperature difference between the outdoor environment temperature and the first temperature is satisfied or not to be less than or equal to the third preset value, if so, determine that there is no condensation risk in the refrigerant heat dissipation pipe, determine the pressure condition of the air conditioning system according to the condensation temperature, if the condensation temperature is less than or equal to the fourth preset value, determine that there is no risk of an excessive pressure caused by reducing the opening degree of the electronic expansion valve, at this time, perform an adjustment operation of the electronic expansion valve, reduce the opening degree of the electronic expansion valve from the first opening degree to the second opening degree, throttle the outdoor unit electronic expansion valve within a controllable range for cooling, and can achieve the advantages of not affecting the use effect of the air conditioning system and not increasing the cost, the refrigerant heat dissipation effect is improved, the heating of the electric control module is effectively reduced, and the service life of electronic components is prolonged.
As shown in fig. 9, a second embodiment of the present invention provides an operation control apparatus 900, which includes at least one control processor 910 and a memory 920 for communication connection with the at least one control processor 910; the control processor 910 and the memory 920 may be connected by a bus or other means, an example of the connection by the bus is shown in fig. 9, the memory 920 stores instructions executable by the at least one control processor 910, and the instructions are executed by the at least one control processor 910 to enable the at least one control processor 910 to perform the outdoor unit control method according to the above first aspect embodiment, for example, to perform the above-described method steps S110 and S120 in fig. 1, method steps S210 to S230 in fig. 2, method step S310 in fig. 3, method steps S410 and S420 in fig. 4, method step S510 in fig. 5, method steps S610 and S620 in fig. 6, method step S710 in fig. 7, and method step S8. Under the refrigeration mode, through obtaining the environmental parameter, the operating parameter of off-premises station and the first temperature of refrigerant cooling tube to according to environmental parameter, operating parameter and the aperture of first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the generating heat of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
An embodiment of a third aspect of the present invention provides an outdoor unit including the operation control device as described above in the embodiment of the second aspect. According to the embodiment of the invention, in the refrigeration mode of the outdoor unit, the environment parameters, the operation parameters of the outdoor unit and the first temperature of the refrigerant radiating pipe are obtained, the opening of the electronic expansion valve is adjusted according to the environment parameters, the operation parameters and the first temperature, the electronic expansion valve of the outdoor unit is utilized to throttle and cool in a controllable range through self detection and coupling control of the outdoor unit, the capacity output of the air conditioning system is ensured, the heating of the electronic control module can be reduced on the premise of not influencing the use effect of the air conditioning system, and the use experience of a user is improved.
An embodiment of a fourth aspect of the present invention provides an air conditioning system, including the outdoor unit and at least one indoor unit as described in the embodiment of the third aspect, wherein the outdoor unit and the indoor unit are connected.
According to the air conditioning system provided by the embodiment of the invention, under the refrigeration mode, the environmental parameters, the operation parameters of the outdoor unit and the first temperature of the cooling pipe of the refrigerant are obtained, the opening of the electronic expansion valve is regulated according to the environmental parameters, the operation parameters and the first temperature, the electronic expansion valve of the outdoor unit is utilized to throttle and cool in a controllable range through self detection and coupling control of the outdoor unit, the capacity output of the air conditioning system is ensured, the heating of the electronic control module can be reduced on the premise of not influencing the use effect of the air conditioning system, and the use experience of a user is favorably improved.
In an embodiment, the air conditioning system can be a multi-split air conditioning system, the electronic control module is a frequency conversion module, the frequency conversion module generates more heat under a high-temperature refrigeration working condition, and the problem of overhigh heat generation of the frequency conversion module can be effectively solved by adopting the outdoor unit of the third embodiment, so that the air conditioning system runs more stably and reliably under the high-temperature refrigeration working condition.
A fifth aspect embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions, which may be used to cause a computer to execute the outdoor unit control method according to the first aspect embodiment, for example, to execute the above-described method steps S110 and S120 in fig. 1, method steps S210 to S230 in fig. 2, method step S310 in fig. 3, method steps S410 and S420 in fig. 4, method step S510 in fig. 5, method steps S610 and S620 in fig. 6, method step S710 in fig. 7, and method step S8. Under the refrigeration mode, through obtaining the environmental parameter, the operating parameter of off-premises station and the first temperature of refrigerant cooling tube to according to environmental parameter, operating parameter and the aperture of first temperature regulation electronic expansion valve, through the self-checking and the coupling control of off-premises station, utilize the electronic expansion valve of off-premises station to throttle the cooling in controllable range, guarantee air conditioning system's ability output, can reduce the generating heat of electrical control module under the prerequisite that does not influence air conditioning system result of use, be favorable to improving user's use and experience the sense.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks, DVD, or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (12)

1. An outdoor unit control method of an air conditioning system is characterized in that the outdoor unit is provided with an electronic expansion valve, an electronic control module and a refrigerant radiating pipe for cooling the electronic control module, and the outdoor unit control method comprises the following steps:
acquiring an environment parameter, an operation parameter of the outdoor unit and a first temperature of the refrigerant radiating pipe, wherein the operation parameter comprises a second temperature of the electronic control module;
and adjusting the opening degree of the electronic expansion valve according to the environmental parameters, the operating parameters and the first temperature so as to enable the temperature of the electronic control module to be within a preset range.
2. The outdoor unit control method of claim 1, wherein the environment parameter comprises an outdoor environment temperature, the operation parameter comprises a condensing temperature of a condenser, and the adjusting the opening degree of the electronic expansion valve according to the environment parameter, the operation parameter and the first temperature comprises:
judging whether the electric control module has a heating risk or not according to the outdoor environment temperature and the second temperature;
under the condition that the heating risk exists, judging whether the refrigerant radiating pipe has the condensation risk or not according to the outdoor environment temperature and the first temperature;
and under the condition that the condensation risk does not exist, adjusting the opening degree of the electronic expansion valve according to the condensation temperature, wherein the condensation temperature is used for reflecting the pressure condition of the air-conditioning system.
3. The outdoor unit control method of claim 2, wherein the determining whether the electronic control module has a heat generation risk according to the outdoor environment temperature and the second temperature comprises:
when the outdoor environment temperature is greater than or equal to a first preset value and the second temperature is greater than or equal to a second preset value, judging that the electric control module has a heating risk; otherwise, the electronic control module is judged to have no heating risk.
4. The outdoor unit control method of claim 2, wherein the determining whether the refrigerant heat dissipation pipe is at risk of condensation according to the outdoor environment temperature and the first temperature comprises:
calculating a temperature difference between the outdoor ambient temperature and the first temperature;
when the temperature difference value is larger than a third preset value, judging that the refrigerant radiating pipe has a condensation risk; otherwise, judging that the cooling medium radiating pipe does not have the condensation risk.
5. The outdoor unit control method of claim 2, wherein the adjusting the opening degree of the electronic expansion valve according to the condensing temperature comprises:
and when the condensation temperature is less than or equal to a fourth preset value, reducing the opening degree of the electronic expansion valve.
6. The outdoor unit control method of claim 5, wherein the operation parameter further comprises a first opening degree of the electronic expansion valve in a current state, and the reducing the opening degree of the electronic expansion valve comprises:
determining a second opening degree according to the first opening degree and a fifth preset value, wherein the fifth preset value is a coefficient smaller than 1;
decreasing the opening degree of the electronic expansion valve from the first opening degree to the second opening degree.
7. The outdoor unit control method of claim 2, further comprising:
when a preset condition is met, maintaining the opening degree of the electronic expansion valve;
wherein the preset condition comprises at least one of:
the second temperature is less than a second preset value;
the temperature difference between the outdoor environment temperature and the first temperature is greater than a third preset value;
the condensing temperature is greater than a fourth preset value.
8. The outdoor unit control method of claim 6, further comprising:
and when the electronic expansion valve operates at the second opening degree for a preset time, the environmental parameters, the operating parameters and the first temperature are acquired again.
9. An operation control device comprising at least one control processor and a memory for communicative connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the outdoor unit control method of any one of claims 1 to 8.
10. An outdoor unit comprising the operation control device according to claim 9.
11. An air conditioning system comprising the outdoor unit of claim 10 and at least one indoor unit, wherein the outdoor unit and the indoor unit are connected.
12. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the outdoor unit control method of any one of claims 1 to 8.
CN202210741698.7A 2022-06-28 2022-06-28 Outdoor unit control method and device of air conditioning system, outdoor unit and air conditioning system Pending CN115031396A (en)

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