WO2024001534A1 - Procédé de commande d'unité extérieure pour système de climatisation, dispositif, unité extérieure et système de climatisation - Google Patents

Procédé de commande d'unité extérieure pour système de climatisation, dispositif, unité extérieure et système de climatisation Download PDF

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Publication number
WO2024001534A1
WO2024001534A1 PCT/CN2023/093010 CN2023093010W WO2024001534A1 WO 2024001534 A1 WO2024001534 A1 WO 2024001534A1 CN 2023093010 W CN2023093010 W CN 2023093010W WO 2024001534 A1 WO2024001534 A1 WO 2024001534A1
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WO
WIPO (PCT)
Prior art keywords
temperature
outdoor unit
opening
expansion valve
electronic expansion
Prior art date
Application number
PCT/CN2023/093010
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English (en)
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
Original Assignee
广东美的制冷设备有限公司
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Application filed by 广东美的制冷设备有限公司 filed Critical 广东美的制冷设备有限公司
Publication of WO2024001534A1 publication Critical patent/WO2024001534A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to the technical field of air conditioning, and in particular to an outdoor unit control method and device of an air conditioning system, an outdoor unit and an air conditioning system.
  • variable frequency multi-split air conditioning systems are becoming more and more popular in the market.
  • more and more manufacturers are gradually using refrigerant cooling technology to replace air cooling.
  • Heat dissipation technology is used to solve the problem of excessive heating of electronic control modules under high-temperature refrigeration.
  • the electronic control module still has the risk of excessive heating for a long time, making The life of components accelerates attenuation and loss.
  • a common way is to reduce the frequency of the compressor to solve the problem of heating of the electronic control module.
  • this method still has poor cooling and heat dissipation effects, and it will also affect the capacity output of the air conditioning system. Reduce the efficiency of the air conditioning system.
  • the present invention aims to at least partially solve one of the technical problems existing in the prior art.
  • the present invention proposes an outdoor unit control method, device, outdoor unit and air conditioning system for an air conditioning system, which can reduce the heat generated by the electronic control module without affecting the use effect of the air conditioning system.
  • embodiments of the present invention provide a method for controlling an outdoor unit of an air conditioning system.
  • the outdoor unit is provided with an electronic expansion valve, an electronic control module, and a refrigerant heat dissipation pipe for cooling the electronic control module.
  • the outdoor unit Machine control methods include:
  • the opening of the electronic expansion valve is adjusted according to the environmental parameters, the operating parameters and the first temperature, so that the temperature of the electronic control module is within a preset range.
  • the outdoor unit control method of the air conditioning system provided by the embodiment of the present invention at least has the following beneficial effects: in the cooling mode, by obtaining the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and based on the environmental parameters, The operating parameters and the opening of the first temperature-adjusting electronic expansion valve are controlled through self-detection and coupling of the outdoor unit.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within a controllable range to ensure the capacity output of the air conditioning system. It can reduce the heat generated by the electronic control module without affecting the use effect of the air conditioning system, which is conducive to improving the user experience.
  • the environmental parameters include outdoor ambient temperature
  • the operating parameters include the condensing temperature of the condenser
  • the electronic parameters are adjusted according to the environmental parameters, the operating parameters and the first temperature.
  • the opening of the expansion valve includes:
  • If there is a risk of heating determine whether there is a risk of condensation on the refrigerant heat dissipation pipe based on the outdoor ambient temperature and the first temperature;
  • the opening of the electronic expansion valve is adjusted according to the condensation temperature, where the condensation temperature is used to reflect the pressure condition of the air conditioning system.
  • Whether there is a risk of heating in the electronic control module can be determined based on the outdoor ambient temperature and the second temperature.
  • the electronic control module has a risk of heating, it can be accurately determined whether there is a risk of condensation on the refrigerant heat pipe based on the outdoor ambient temperature and the first temperature.
  • the refrigerant heat pipe There is no risk of condensation.
  • the opening of the electronic expansion valve is adjusted according to the condensation temperature. Since the condensation temperature can reflect the pressure of the air conditioning system, the opening of the electronic expansion valve is adjusted while ensuring the working stability of the air conditioning system. That is, the electronic expansion valve It plays the role of throttling and cooling within a controllable range, which can effectively reduce the refrigerant temperature and ensure efficient heat exchange between the refrigerant heat pipe and the electronic control module.
  • determining whether there is a heating risk in the electronic control module based on the outdoor ambient temperature and the second temperature includes:
  • the electronic control module When the outdoor ambient temperature is greater than or equal to the first preset value and the second temperature is greater than or equal to the second preset value, it is determined that the electronic control module has a heating risk; otherwise, it is determined that the electronic control module does not have a heating risk. .
  • the outdoor ambient temperature when it is detected that the outdoor ambient temperature is greater than or equal to the first preset value, it means that the electronic control module is working under high temperature conditions and enters the high temperature heat dissipation function.
  • the second temperature is greater than or equal to the second preset value. If the value is set, it is considered that the temperature of the electronic control module is too high, and it is determined that there is a risk of heating in the electronic control module, and further determines whether there is a risk of condensation in the refrigerant heat pipe. If there is no risk of condensation, adjust the electronic expansion valve according to the condensation temperature. opening.
  • determining whether there is a risk of condensation in the refrigerant heat dissipation pipe based on the outdoor ambient temperature and the first temperature includes:
  • the refrigerant heat dissipation pipe has a risk of condensation; otherwise, it is determined that the refrigerant heat dissipation pipe does not have a risk of condensation.
  • the temperature difference By obtaining the outdoor ambient temperature and the first temperature, calculate the temperature difference between the outdoor ambient temperature and the first temperature.
  • the temperature difference is greater than the third preset value, it means that the refrigerant temperature is too low, which can easily cause the surface temperature of the refrigerant heat pipe to be lower than the outdoor ambient temperature, thus causing condensation on the surface of the refrigerant heat pipe, and it is determined that there is a risk of condensation on the refrigerant heat pipe.
  • condensation occurs on the surface of the refrigerant heat pipe, it will easily touch the electronic components of the electronic control module, causing a short circuit of the electronic control module and affecting the reliability of the operation of the electronic control module.
  • the temperature difference is less than or equal to the third The preset value is determined to determine that there is no risk of condensation on the refrigerant heat pipe, and then the opening of the electronic expansion valve is adjusted according to the condensation temperature to ensure the reliability of the air conditioning system.
  • adjusting the opening of the electronic expansion valve according to the condensation temperature includes:
  • the opening of the electronic expansion valve is reduced.
  • condensation temperature when the condensation temperature is less than or equal to the fourth preset value, it means that the pressure of the air conditioning system is within the normal range, and it is considered that there is no risk of excessive pressure caused by reducing the opening of the electronic expansion valve. At this time, it can Implement control measures to reduce the opening of the electronic expansion valve.
  • the throttling and cooling effect of the electronic expansion valve can effectively reduce the refrigerant temperature.
  • the refrigerant heat dissipation effect can be effectively improved and the electronic control The heat generated by the module makes the temperature of the electronic control module within the preset range.
  • the operating parameters also include the first opening of the electronic expansion valve in the current state, and reducing the opening of the electronic expansion valve includes:
  • the second opening is determined according to the first opening and a fifth preset value, wherein the fifth preset value is a coefficient less than 1;
  • the opening of the electronic expansion valve is reduced from the first opening to the second opening.
  • the second opening degree is calculated based on the first opening degree and the fifth preset value.
  • the second opening is smaller than the first opening, and the opening of the electronic expansion valve is reduced from the first opening to the second opening, using the throttling and cooling effect of the electronic expansion valve to effectively reduce the refrigerant temperature.
  • the above outdoor unit control methods also include:
  • the preset conditions include at least one of the following:
  • the second temperature is less than the second preset value
  • the temperature difference between the outdoor ambient temperature and the first temperature is greater than a third preset value
  • the condensation temperature is greater than the fourth preset value.
  • the opening of the electronic expansion valve is maintained, that is, the adjustment action of the electronic expansion valve is not performed.
  • the second temperature is less than the second preset value, it means that the temperature of the electronic control module If the risk is within the controllable range, it is determined that there is no risk of heating in the electronic control module, and the opening of the electronic expansion valve is maintained.
  • the outdoor ambient temperature is the same as the first If the temperature difference is greater than the third preset value, it is determined that there is a risk of condensation on the refrigerant heat pipe, and the opening of the electronic expansion valve is maintained to reduce the surface of the refrigerant heat pipe caused by adjusting the opening of the electronic expansion valve to make the refrigerant temperature too low.
  • condensation temperature when the condensation temperature is greater than the fourth preset value, it means that the pressure of the air conditioning system is relatively high, and the opening of the electronic expansion valve is maintained to reduce the occurrence of excessive pressure caused by reducing the opening of the electronic expansion valve. conditions to ensure the reliability of the air conditioning system.
  • the above outdoor unit control methods also include:
  • the electronic expansion valve After 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 reacquired.
  • the air conditioning system continues to run for the preset time to ensure the stability and reliability of the air conditioning system.
  • the environmental parameters and operating parameters are reacquired. and the first temperature, and re-adjusts the opening of the electronic expansion valve according to the environmental parameters, operating parameters and the first temperature.
  • the operating status of the electronic expansion valve can be adjusted in real time to ensure that the temperature of the electronic control module is within the preset range, which is conducive to improving Control flexibility and accuracy.
  • an embodiment of the present invention provides an operation control device, including at least one control processor and a memory for communicative connection with the at least one control processor; the memory stores information that can be processed by the at least one control processor.
  • the instruction is executed by the at least one control processor, so that the at least one control processor can execute the outdoor unit control method as described in the above embodiment of the first aspect.
  • the operation control device provided according to the embodiment of the present invention has at least the following beneficial effects: in the cooling mode, by obtaining the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and based on the environmental parameters, operating parameters and the first temperature of the refrigerant heat pipe, 1.
  • the opening of the temperature-adjusting electronic expansion valve Through the self-detection and coupling control of the outdoor unit, the electronic expansion valve of the outdoor unit is used to throttle and cool down within the controllable range, ensuring the capacity output of the air-conditioning system and being able to operate the air-conditioning system without affecting its use. It can reduce the heat generated by the electronic control module while maintaining the best effect, which is conducive to improving the user's experience.
  • an embodiment of the present invention provides an outdoor unit, including the operation control device described in the above embodiment of the second aspect.
  • the outdoor unit provided according to the embodiment of the present invention at least has the following beneficial effects: in the cooling mode, by obtaining the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and based on the environmental parameters, operating parameters and the first temperature of the refrigerant heat pipe,
  • the opening of the temperature-adjusting electronic expansion valve is controlled through self-detection and coupling of the outdoor unit.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within the controllable range, ensuring the capacity output of the air conditioning system without affecting the use effect of the air conditioning system.
  • On the premise of reducing the heat of the electronic control module it is conducive to improving the user's experience.
  • an embodiment of the present invention provides an air conditioning system, including an outdoor air conditioner as described in the third embodiment.
  • the outdoor unit is connected to at least one indoor unit.
  • the air conditioning system provided according to the embodiment of the present invention has at least the following beneficial effects: in the cooling mode, by obtaining the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and based on the environmental parameters, operating parameters and the first temperature of the refrigerant heat pipe,
  • the opening of the temperature-adjusting electronic expansion valve is controlled through self-detection and coupling of the outdoor unit.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within the controllable range, ensuring the capacity output of the air conditioning system without affecting the use effect of the air conditioning system.
  • On the premise of reducing the heat of the electronic control module it is conducive to improving the user's experience.
  • embodiments of the present invention provide a computer-readable storage medium that stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute as described in the first embodiment. outdoor unit control method.
  • the computer-readable storage medium provided according to the embodiment of the present invention has at least the following beneficial effects: in the cooling mode, by obtaining the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and based on the environmental parameters and operating parameters, and the opening of the first temperature-adjusting electronic expansion valve.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within a controllable range, ensuring the capacity output of the air conditioning system without affecting the air conditioner.
  • the heating of the electronic control module is reduced, which is beneficial to improving the user experience.
  • Figure 1 is a flow chart of an outdoor unit control method provided by Embodiment 1 of the present invention.
  • Figure 2 is a flow chart of an outdoor unit control method provided by Embodiment 2 of the present invention.
  • Figure 3 is a flow chart of an outdoor unit control method provided by Embodiment 3 of the present invention.
  • Figure 4 is a flow chart of an outdoor unit control method provided by Embodiment 4 of the present invention.
  • Figure 5 is a flow chart of an outdoor unit control method provided by Embodiment 5 of the present invention.
  • Figure 6 is a flow chart of an outdoor unit control method provided by Embodiment 6 of the present invention.
  • Figure 7 is a flow chart of the outdoor unit control method provided by Embodiment 7 of the present invention.
  • Figure 8 is an overall flow chart of the outdoor unit control method provided by Embodiment 8 of the present invention.
  • Figure 9 is a schematic structural diagram of an operation control device provided in Embodiment 9 of the present invention.
  • connection/connection should be understood in a broad sense.
  • it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be Mechanical connection can also be electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.
  • the outdoor unit control method, device, outdoor unit and air conditioning system of the air conditioning system provided by the embodiments of the present invention can reduce the heat generation of the electronic control module without affecting the use effect of the air conditioning system.
  • the air conditioning system in the embodiment of the present invention may include an outdoor unit and an indoor unit.
  • the outdoor unit is provided with an electronic expansion valve, an electronic control module and a refrigerant heat dissipation pipe.
  • the electronic control module can control the working state of the air conditioning system, for example, control the air conditioning system to operate in refrigeration.
  • the refrigerant heat pipe is used to cool the electronic control module.
  • a radiator on the outdoor unit such as an aluminum plate
  • the electronic control module and the refrigerant heat pipe are placed on both sides of the radiator respectively.
  • the heat generated by the electronic control module Heat can be transferred to the refrigerant heat pipe through the radiator, and the lower-temperature liquid refrigerant can take away the heat by flowing through the refrigerant heat pipe, thereby achieving effective heat dissipation of the electronic control module.
  • the first embodiment of the present invention provides an outdoor unit control method of the air conditioning system, including but not limited to step S110 and step S120:
  • Step S110 Obtain environmental parameters, operating parameters of the outdoor unit, and the first temperature of the refrigerant heat pipe, where the operating parameters include the second temperature of the electronic control module.
  • the environmental parameters may include but are not limited to outdoor ambient temperature, outdoor ambient humidity and other applicable parameters.
  • the operating parameters of the outdoor unit may include but are not limited to the second temperature of the electronic control module, the condensation temperature of the condenser, the opening of the electronic expansion valve, the rotation speed of the outdoor fan and other applicable parameters.
  • the first temperature is the refrigerant heat pipe
  • the inlet temperature can reflect the working conditions of the outdoor unit in the current state by obtaining the environmental parameters and the operating parameters of the outdoor unit.
  • the first temperature of the refrigerant heat pipe is obtained. Combined with the environmental parameters, it can reflect the condensation of the refrigerant heat pipe in the current state. risk situation.
  • temperature sensors may be provided on the refrigerant heat pipe and the electronic control module to obtain the first temperature and the second temperature.
  • Step S120 Adjust the opening of the electronic expansion valve according to environmental parameters, operating parameters and the first temperature, so that the temperature of the electronic control module is within a preset range.
  • the opening of the electronic expansion valve is adaptively adjusted. Specifically, the opening of the electronic expansion valve can be adjusted to reduce By reducing or increasing the opening of the electronic expansion valve, through coupling control of environmental parameters, operating parameters, first temperature and the electronic expansion valve, the electronic expansion valve can be used to throttle and cool down within a controllable range, which can be achieved without increasing costs. On the other hand, it can more effectively improve the cooling effect of refrigerant and extend the service life of electronic components.
  • the preset range is the safe temperature range of the electronic control module. Different electronic control modules have different preset ranges. When the temperature of the electronic control module is within the preset range, the electronic control module has high working reliability and can Ensure the stability of the air conditioning system.
  • the outdoor unit control method of the air conditioning system provided by the above-mentioned embodiment of the first aspect, in the cooling mode, obtains the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and controls the outdoor unit according to the environmental parameters, operating parameters and the first temperature of the refrigerant heat pipe.
  • the opening of the temperature-adjusting electronic expansion valve is controlled through self-detection and coupling of the outdoor unit.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within the controllable range, ensuring the capacity output of the air conditioning system without affecting the use effect of the air conditioning system.
  • On the premise of reducing the heat of the electronic control module it is conducive to improving the user's experience.
  • the air conditioning system when the air conditioning system is in the refrigeration mode, it mainly relies on the electronic expansion valve of the indoor unit to perform throttling and pressure reduction to achieve evaporation heat exchange.
  • the electronic expansion valve of the outdoor unit maintains Fixed.
  • the temperature of the refrigerant entering the refrigerant heat pipe only depends on the condensation effect of the condenser.
  • the electronic control module still has the risk of overheating for a long time, and the life of components will also accelerate attenuation. loss. If the problem of heating of the electronic control module is solved by reducing the frequency of the compressor, the use effect of the air conditioning system will be greatly reduced.
  • the outdoor unit control method of the air conditioning system in the embodiment of the present invention automatically controls the outdoor unit. Determine the environmental parameters, operating parameters and first temperature to adaptively adjust the opening of the electronic expansion valve.
  • the electronic expansion valve of the outdoor unit can throttle. Function, and cooperates with the electronic expansion valve of the indoor unit, will not affect the cooling output of the air conditioning system, and can ensure good use of the air conditioning system.
  • the refrigerant temperature can be effectively reduced, thereby improving the heat exchange efficiency. fruit.
  • the environmental parameters include the outdoor ambient temperature
  • the operating parameters include the condensing temperature of the condenser.
  • Step S120 adjusts the opening of the electronic expansion valve according to the environmental parameters, operating parameters and the first temperature. Including but not limited to step S210 to step S230:
  • Step S210 Determine whether the electronic control module has a heating risk based on the outdoor ambient temperature and the second temperature
  • Step S220 If there is a risk of heating, determine whether there is a risk of condensation on the refrigerant heat dissipation pipe based on the outdoor ambient temperature and the first temperature;
  • Step S230 When there is no risk of condensation, adjust the opening of the electronic expansion valve according to the condensation temperature, where the condensation temperature is used to reflect the pressure of the air conditioning system.
  • condensation temperature is the temperature in the middle of the condenser, and temperature sensors can be set at corresponding locations to obtain the condensation temperature and outdoor ambient temperature.
  • the outdoor ambient temperature can reflect the working temperature of the electronic control module in its current state, and the second temperature can reflect the operating temperature of the electronic control module. Based on the outdoor ambient temperature and the second temperature, it can be determined whether the electronic control module has a heating risk. When the electronic control module There is a risk of heating in the module. According to the outdoor ambient temperature and the first temperature, it can be accurately judged whether there is a risk of condensation on the refrigerant heat pipe. When there is no risk of condensation on the refrigerant heat pipe, the opening of the electronic expansion valve is adjusted according to the condensation temperature. Since the condensation temperature can It reflects the pressure of the air conditioning system and adjusts the opening of the electronic expansion valve while ensuring the working stability of the air conditioning system. This allows the electronic expansion valve to play a throttling and cooling role within a controllable range, which can effectively reduce the refrigerant temperature and ensure refrigerant heat dissipation. Efficient heat exchange between tubes and electronic control modules.
  • the opening of the electronic expansion valve is adjusted according to the condensation temperature to reduce the occurrence of the problem.
  • condensation temperature can be used to determine whether the pressure of the air conditioning system is too high in the current state. According to the condensation The temperature adjusts the opening of the electronic expansion valve to reduce excessive pressure caused by adjusting the opening of the electronic expansion valve, ensuring that the entire air conditioning system operates within a safe and reliable range, which is conducive to improving control accuracy.
  • step S210 it is determined whether the electronic control module has a heating risk based on the outdoor ambient temperature and the second temperature, including:
  • Step S310 When the outdoor ambient temperature is greater than or equal to the first preset value and the second temperature is greater than or equal to the second preset value, it is determined that the electronic control module has a heating risk; otherwise, it is determined that the electronic control module does not have a heating risk.
  • the outdoor ambient temperature when it is detected that the outdoor ambient temperature is greater than or equal to the first preset value, it means that the electronic control module is working under high temperature conditions and enters the high temperature heat dissipation function.
  • the second temperature is greater than or equal to the second preset value, Set value, then recognize Because the temperature of the electronic control module is too high, it is determined that the electronic control module has a heating risk, and further determines whether there is a risk of condensation in the refrigerant heat pipe. If there is no risk of condensation, adjust the opening of the electronic expansion valve according to the condensation temperature.
  • the outdoor ambient temperature is less than the first preset value, it means that the electronic control module is operating within a suitable temperature range and does not need to enter the high temperature heat dissipation function.
  • the outdoor ambient temperature is greater than or equal to the first preset value and the second temperature If it is less than the second preset value, it means that the temperature of the electronic control module is within a risk-controllable range. 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.
  • step S220 it is determined whether there is a risk of condensation on the refrigerant heat sink based on the outdoor ambient temperature and the first temperature, including but not limited to step S410 and step S420:
  • Step S410 Calculate the temperature difference between the outdoor ambient temperature and the first temperature
  • Step S420 When the temperature difference is greater than the third preset value, it is determined that the refrigerant heat dissipation pipe has a risk of condensation; otherwise, it is determined that the refrigerant heat dissipation pipe does not have a risk of condensation.
  • the temperature difference between the outdoor ambient temperature and the first temperature is calculated.
  • the temperature difference is greater than the third preset value, it indicates that the refrigerant temperature is too low, which easily causes the surface temperature of the refrigerant heat pipe to be lower than the outdoor temperature. If the ambient temperature is low, resulting in condensation on the surface of the refrigerant heat pipe, it is determined that the refrigerant heat pipe is at risk of condensation. If condensation occurs on the surface of the refrigerant heat pipe, it is easy to touch the electronic components of the electronic control module, thus causing an electric shock. The short circuit of the control module affects the reliability of the operation of the electronic control module. When the temperature difference is less than or equal to the third preset value, it is determined that there is no risk of condensation on the refrigerant heat pipe, and then the opening of the electronic expansion valve is adjusted according to the condensation temperature. Ensure the reliability of the air conditioning system.
  • adjusting the opening of the electronic expansion valve according to the condensation temperature in step S230 includes:
  • Step S510 When the condensation temperature is less than or equal to the fourth preset value, reduce the opening of the electronic expansion valve.
  • condensation temperature when the condensation temperature is less than or equal to the fourth preset value, it means that the pressure of the air conditioning system is within the normal range, and it is considered that there is no risk of excessive pressure caused by reducing the opening of the electronic expansion valve. At this time, it can Implement control measures to reduce the opening of the electronic expansion valve.
  • the throttling and cooling effect of the electronic expansion valve can effectively reduce the refrigerant temperature.
  • the refrigerant heat dissipation effect can be effectively improved and the electronic control The heat generated by the module makes the temperature of the electronic control module within the preset range.
  • the outdoor unit control method of the embodiment of the present invention reduces the opening of the electronic expansion valve of the outdoor unit within a controllable range, so that the electronic expansion valve of the outdoor unit can play a throttling role and can effectively reduce Enter the refrigerant powder
  • the refrigerant temperature of the heat pipe can give full play to the heat exchange effect of the refrigerant.
  • the opening of the electronic expansion valve of the outdoor unit is maintained within a certain opening range, which will not affect the use effect of the air conditioning system and ensure a good user experience. feel.
  • the operating parameters also include the first opening of the electronic expansion valve in the current state.
  • the opening of the electronic expansion valve is reduced, including but not limited to step S610 and steps S620:
  • Step S610 Determine the second opening degree according to the first opening degree and the fifth preset value, where the fifth preset value is a coefficient less than 1;
  • Step S620 Decrease the opening of the electronic expansion valve from the first opening to the second opening.
  • the second opening degree is calculated based on the first opening degree and the fifth preset value.
  • the second opening is smaller than the first opening, and the opening of the electronic expansion valve is reduced from the first opening to the second opening, using the throttling and cooling effect of the electronic expansion valve to effectively reduce the refrigerant temperature.
  • the initial opening when the air conditioning system is turned on is the first opening.
  • the initial opening is usually the maximum opening of the electronic expansion valve.
  • the opening of the electronic expansion valve is changed from the maximum opening.
  • the opening degree is reduced to the second opening degree. If the air conditioning system has been started for a period of time, the opening degree of the electronic expansion valve may have been adjusted smaller, that is, the first opening degree in the current state may be smaller than the maximum opening degree, then the first opening degree will be reduced.
  • the opening degree is reduced to the second opening degree, and the fifth preset value can be set according to the actual situation.
  • the embodiment of the present invention does not impose specific restrictions, and it is sufficient to ensure that the second opening degree is within a certain opening range.
  • the above outdoor unit control method also includes the following steps:
  • the preset conditions include at least one of the following:
  • the second temperature is less than the second preset value
  • the temperature difference between the outdoor ambient temperature and the first temperature is greater than the third preset value
  • the condensing temperature is greater than the fourth preset value.
  • the opening of the electronic expansion valve is maintained, that is, the adjustment action of the electronic expansion valve is not performed.
  • the second temperature is less than the second preset value, it means that the temperature of the electronic control module If the risk is within a controllable range, it is determined that there is no risk of heating in the electronic control module, and the opening of the electronic expansion valve is maintained.
  • the temperature difference between the outdoor ambient temperature and the first temperature is greater than the third preset value, it is determined that the refrigerant heat dissipation pipe There is a risk of condensation.
  • the condensation temperature is greater than the fourth preset value, it means If the pressure of the air conditioning system is relatively high, keep the opening of the electronic expansion valve open to reduce the occurrence of excessive pressure caused by reducing the opening of the electronic expansion valve, which can ensure the working reliability of the air conditioning system.
  • the environmental parameters, operating parameters and first temperature are reacquired, and the operating status of the electronic expansion valve can be adjusted in real time to ensure that the electronic control The module's temperature is within the preset range.
  • the above outdoor unit control method also includes the following steps:
  • Step S710 After the electronic expansion valve operates at the second opening degree for a preset time, reacquire the environmental parameters, operating parameters and first temperature.
  • the air conditioning system continues to run for the preset time to ensure the stability and reliability of the air conditioning system.
  • the environmental parameters and operating parameters are reacquired. and the first temperature, and re-adjusts the opening of the electronic expansion valve according to the environmental parameters, operating parameters and the first temperature.
  • the operating status of the electronic expansion valve can be adjusted in real time to ensure that the temperature of the electronic control module is within the preset range, which is conducive to improving Control flexibility and accuracy.
  • the outdoor unit control method of the present invention is specifically as follows:
  • EXV2 K1*EXV1; reduce the opening of the electronic expansion valve from the first opening EXV1 to the second opening EXV2, and perform step 8; where K1 is the fifth preset value;
  • step 8 After running for t time, return to step 2; where t is the preset time.
  • 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 the actual needs of the air conditioning system, and are not specifically limited in the embodiment of the present invention. .
  • the outdoor unit control method when the outdoor ambient temperature is greater than or equal to the first preset value, it enters the high temperature range. In heat dissipation mode, if it is detected that the second temperature is greater than or equal to the second preset value, it is determined that the electronic control module has a risk of heating. At this time, it is determined whether the temperature difference between the outdoor ambient temperature and the first temperature is less than or equal to the third preset value. , if satisfied, it is considered that there is no risk of condensation on the refrigerant heat pipe, and the pressure of the air conditioning system is determined by the condensation temperature. If the condensation temperature is less than or equal to the fourth preset value, it is considered that there is no risk of condensation due to reducing the opening of the electronic expansion valve.
  • the electronic expansion valve is adjusted to reduce the opening of the electronic expansion valve from the first opening to the second opening, and the outdoor unit electronic expansion valve is used to throttle within the controllable range. Cooling can improve the refrigerant heat dissipation effect, effectively reduce the heat generation of electronic control modules, and extend the service life of electronic components without affecting the effectiveness of the air conditioning system and without increasing costs.
  • a second embodiment of the present invention provides an operation control device 900, including at least one control processor 910 and a memory 920 used to communicate with the at least one control processor 910; the control processor 910 and the memory 920 may be connected through a bus or other means.
  • Figure 9 shows an example of being connected through a bus.
  • the memory 920 stores instructions that can be executed by at least one control processor 910.
  • the instructions are executed by at least one control processor 910, so that at least one The control processor 910 can perform the outdoor unit control method of the first aspect embodiment as above, for example, perform the above-described method steps S110 and S120 in Figure 1 , method steps S210 to S230 in Figure 2 , and method steps in Figure 3 S310, method steps S410 and S420 in Figure 4, method step S510 in Figure 5, method steps S610 and S620 in Figure 6, method step S710 in Figure 7, and method steps in Figure 8.
  • the outdoor unit self-tests and Coupling control uses the electronic expansion valve of the outdoor unit to throttle and cool down within the controllable range to ensure the capacity output of the air conditioning system. It can reduce the heat generated by the electronic control module without affecting the use effect of the air conditioning system, which is beneficial to improving user use. Experience.
  • a third embodiment of the present invention provides an outdoor unit, including the operation control device of the above second embodiment.
  • the outdoor unit of the embodiment of the present invention obtains the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and adjusts the opening of the electronic expansion valve according to the environmental parameters, operating parameters and the first temperature.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within the controllable range, ensuring the capacity output of the air conditioning system, and reducing the heat generation of the electronic control module without affecting the use effect of the air conditioning system. , which is conducive to improving the user experience.
  • a fourth embodiment of the present invention provides an air conditioning system, including the outdoor unit of the third embodiment and at least one indoor unit, and the outdoor unit and the indoor unit are connected.
  • the air conditioning system of the embodiment of the present invention obtains the environmental parameters, the operating parameters of the outdoor unit and the first temperature of the refrigerant heat pipe, and adjusts the opening of the electronic expansion valve according to the environmental parameters, operating parameters and the first temperature.
  • the electronic expansion valve of the outdoor unit is used to throttle and cool down within the controllable range, ensuring The capacity output of the air conditioning system can reduce the heat generated by the electronic control module without affecting the use effect of the air conditioning system, which is conducive to improving the user experience.
  • 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 high-temperature refrigeration conditions.
  • a fifth embodiment of the present invention provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer-executable instructions.
  • the computer-executable instructions can be used to cause a computer to execute the outdoor unit control method of the first embodiment. , for example, perform the above-described method steps S110 and S120 in Figure 1, method steps S210 to S230 in Figure 2, method step S310 in Figure 3, method steps S410 and S420 in Figure 4, and the method in Figure 5 Step S510, method steps S610 and S620 in Fig. 6, method step S710 in Fig. 7, and method steps in Fig. 8.
  • the outdoor unit self-tests and Coupling control uses the electronic expansion valve of the outdoor unit to throttle and cool down within the controllable range to ensure the capacity output of the air conditioning system. It can reduce the heat generated by the electronic control module without affecting the use effect of the air conditioning system, which is beneficial to improving user use. Experience.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk, DVD or other optical disk storage, magnetic cassettes, magnetic tape, disk storage or other magnetic storage devices, or may be used Any other medium that stores the desired information and can be accessed by a computer. Additionally, it is known to those of ordinary skill in the art that 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 may include any information delivery media .

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  • General Engineering & Computer Science (AREA)
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  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
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Abstract

L'invention concerne un procédé de commande d'unité extérieure pour un système de climatisation, un dispositif, une unité extérieure, ainsi qu'un système de climatisation. Le procédé de commande d'unité extérieure consiste à : obtenir des paramètres environnementaux, des paramètres de fonctionnement d'une unité extérieure, et une première température d'un tuyau de dissipation de chaleur de fluide frigorigène, les paramètres de fonctionnement comprenant une deuxième température d'un module de commande électrique (S110) ; et régler le degré d'ouverture d'un détendeur électronique en fonction des paramètres environnementaux, des paramètres de fonctionnement et de la première température, de telle sorte que la température du module de commande électrique se trouve dans une plage prédéfinie (S120). Ainsi, la chaleur générée par le module de commande électrique peut être réduite sans affecter l'effet d'utilisation du système de climatisation.
PCT/CN2023/093010 2022-06-28 2023-05-09 Procédé de commande d'unité extérieure pour système de climatisation, dispositif, unité extérieure et système de climatisation WO2024001534A1 (fr)

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