WO2023167209A1 - 新気システムおよびその制御方法 - Google Patents

新気システムおよびその制御方法 Download PDF

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Publication number
WO2023167209A1
WO2023167209A1 PCT/JP2023/007442 JP2023007442W WO2023167209A1 WO 2023167209 A1 WO2023167209 A1 WO 2023167209A1 JP 2023007442 W JP2023007442 W JP 2023007442W WO 2023167209 A1 WO2023167209 A1 WO 2023167209A1
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WIPO (PCT)
Prior art keywords
fresh air
value
unit
difference value
indoor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/007442
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English (en)
French (fr)
Japanese (ja)
Inventor
▲含▼ 孫
文雅 張
定東 肖
慶柱 孟
真希 奥野
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Daikin Industries Ltd
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Daikin Industries Ltd
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Priority to JP2024504705A priority Critical patent/JPWO2023167209A1/ja
Publication of WO2023167209A1 publication Critical patent/WO2023167209A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • 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
    • 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
    • F24F2110/30—Velocity
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/66—Volatile organic compounds [VOC]
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/74—Ozone
    • 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 fresh air systems, and more particularly to fresh air systems and control methods thereof.
  • the operation method of the fresh air system is a replacement method that is more beneficial to health, sucking fresh outdoor air into the room and filtering the indoor air
  • the indoor exhaust gas can be discharged to the outside to keep the room comfortable while maintaining the air circulation.
  • the conventional fresh air system has a single control mode and cannot adapt to changes in the indoor environment in a timely manner, which has greatly increased the user's usage cost.
  • the majority of users are less likely to use fresh air systems on a daily basis due to the high energy consumption and high operating costs of fresh air systems. Ventilation using conventional methods such as opening doors and windows is preferred.
  • the present invention can adjust the amount of fresh air introduced by the indoor blower unit in real time based on the second difference value, so as not only to ensure good comfort of the fresh air system, but also to save energy in the fresh air system.
  • An object of the present invention is to provide a control method for a fresh air system that can improve performance.
  • the present invention provides a method for controlling a fresh air system comprising a detection unit, a control unit and a room blower unit, wherein the room blower unit of the fresh air device comprises a direct current motor, the method comprises: the detection unit a step of detecting indoor air quality and obtaining a detected value Z m (where m is a positive integer); calculating a first difference value e m from the value Z0 ; turning on the indoor blower unit if the first difference value e m is greater than the set value L; after that, the control unit calculates a second difference value f m between the first difference value e m obtained in the current period and the first difference value e m ⁇ 1 obtained in the previous period.
  • the present invention controls turning on of the indoor blower unit based on the first difference value e m , and turns on the indoor blower unit based on the second difference value f m after the indoor blower unit is turned on. Since the amount of fresh air is directly adjusted, there is no need to compare the detected value obtained in every cycle with the preset value to obtain the corresponding amount of fresh air during the operation process of the fresh air system, and the algorithm is simple. It is clear, clear, easy to control, and avoids frequent starting and stopping of the fresh air device.
  • the indoor blower unit is provided with a plurality of blowing levels, and the higher the blowing level, the larger the amount of fresh air introduced.
  • Switch the fan level the present invention uses a continuously variable DC motor to realize a plurality of air blowing level divisions, making it easier to adjust the fresh air introduction amount of the indoor blower unit more accurately, improving the user's comfort and fresh air. Improve system energy efficiency.
  • the control unit increases the blowing level of the indoor blower unit, and if the second difference value fm is equal to 0, the control unit increases the blowing level of the indoor blower unit , and if the second difference value f m is less than 0, the control unit decreases the air blowing level of the indoor blowing unit.
  • the present invention can directly adjust the blowing level based on the second difference value fm , and the control logic is simple and easy to set.
  • the control unit calculates the fresh air increase amount based on the second difference value fm , adjusts the fresh air introduction amount of the indoor blower unit based on the fresh air increase amount, and determines the fresh air increase amount ⁇ Fan.
  • the control unit adjusts the correction amount based on the detected value, the first difference value, and the second difference value, and adjusts the correction amount based on the first difference value, the second difference value, and the adjusted correction amount. to calculate the fresh air increase amount ⁇ Fan, and then adjust the fresh air introduction amount of the indoor blower unit based on the fresh air increase amount ⁇ Fan.
  • the fuzzy controller to regulate the introduction of fresh air, the amount of fresh air introduced can be controlled more precisely, the comfort in the room is improved, the operation process of the fresh air system is more energy-saving, and , to reduce the user's usage cost.
  • S is a period
  • Si is a predetermined parameter value
  • kp, n, ki, kd are correction amounts.
  • the indoor blower unit is turned off.
  • the indoor blower unit is turned off.
  • the control unit causes the detection unit to set the third setting based on the detection values obtained by the detection unit within the second set time period.
  • a detection value that can be obtained after the vehicle continues to drive for a period of time is predicted, a prediction value of the detection result is obtained, and then a fourth difference between the prediction value of the detection result and the detection value obtained in the current cycle. Further comprising calculating the value.
  • the control unit increases the fresh air introduction amount of the indoor blower unit.
  • the amount of fresh air introduced within the third set time period can be increased in advance, thereby avoiding the continuous deterioration of the air quality within the third set time period and improving the comfort of the room. Contribute to improving the feeling.
  • the control unit maintains the fresh air introduction amount of the indoor blower unit within the fourth set time period, and then turns off the indoor blower unit.
  • Such a setting can not only improve the user's usage experience, but also reduce the energy consumption of the fresh air system and reduce the user's usage cost.
  • the detection unit comprises one or more of a CO2 sensor, a particle sensor, a formaldehyde sensor, a TVOC sensor, a temperature sensor and a humidity sensor.
  • the detection unit can realize a comprehensive monitoring of the indoor air quality and improve the precision of the fresh air system's air volume regulation.
  • the fresh air system further includes an air conditioner
  • the control unit adjusts the blowing temperature of the indoor blower unit based on the set temperature T of the air conditioner.
  • Adjusting the blast temperature of the fresh air introduced into the fresh air device based on the set temperature of the air conditioner and realizing cooperative control between the air conditioner and the fresh air device allows the temperature of the fresh air to be adjusted according to the system performance requirements. It can match and satisfy the user's comfort, and at the same time, realize the energy saving effect and reduce the user's usage cost.
  • the detection unit includes an indoor temperature sensor for detecting an indoor temperature T1 and an outdoor temperature sensor for detecting an outdoor temperature T2, and the control unit detects a difference value between the indoor temperature T1 and the outdoor temperature T2 and Based on the set temperature T, the operating state of the fresh air device is adjusted. Adjusting the operation state of the fresh air device based on the indoor and outdoor temperature difference can precisely adjust the temperature of the fresh air introduced into the fresh air device, and the control accuracy is high, and the user's comfort is improved. The requirements can be met more effectively, and the energy efficiency is high.
  • the fresh air device further includes a fresh air heat exchange unit and an electric valve connected to the fresh air heat exchange unit, and when
  • If -T2
  • the fresh air device further includes a compressor
  • the control unit adjusts the operating frequency of the compressor based on the set temperature T and the difference value between the indoor temperature T1 and the outdoor temperature T2.
  • the control accuracy is high, the user's demand for comfort can be more satisfied, and the energy saving is high.
  • the fresh air system includes a plurality of air conditioners, each of which has a set temperature
  • the control unit adjusts the air blow of the indoor blower unit based on an average value of the plurality of set temperatures. Regulate temperature.
  • the blast temperature of the fresh air can be brought closer to the indoor temperature of the area where the plurality of air conditioners are located, thereby improving the user's comfort level. It satisfies comfort and at the same time achieves energy-saving effects, thereby reducing the user's operating costs.
  • the present invention further provides a fresh air system controlled by the above control method.
  • the advantage of the present invention is that the use of a DC motor provides a fresh air system air volume control method that takes advantage of the excellent speed change performance of the DC motor and changes the amount of fresh air introduction with the second difference value.
  • the energy saving performance of the fresh air system is greatly improved, the energy consumption is reduced, and the single By avoiding an increase in usage cost due to the control mode of 1, the user is encouraged to use the new air system, and the non-use after purchasing the new air system is reduced.
  • FIG. 4 is a flow chart of air volume control of a fresh air system provided by one technical solution of the present invention
  • FIG. 4 is a flow chart of air volume control of fresh air system provided by another technical solution of the present invention
  • FIG. 10 is a schematic diagram of a function of the first difference value e m of the correction amount n in Example 1/2
  • FIG. 11 is a schematic diagram of a function related to the second difference value fm of the correction amount kp in Example 2
  • FIG. 11 is a schematic diagram of a function related to the detected value Zm of the correction amount ki in Example 2
  • FIG. 11 is a schematic diagram of a function related to the third difference value gm of the correction amount kd in Example 2
  • 1 is a schematic diagram of a fresh air system according to the invention
  • FIG. 10 is a schematic diagram of a function of the first difference value e m of the correction amount n in Example 1/2
  • FIG. 11 is a schematic diagram of a function related to the second difference value f
  • the present invention provides a fresh air system including an air conditioner and a fresh air device, wherein the air conditioner includes an air conditioner outdoor unit and an air conditioner indoor unit, and an air conditioner outdoor unit.
  • a heat exchange unit is provided in each of the air conditioner and the air conditioner indoor unit (that is, the air conditioner outdoor unit has an outdoor heat exchange unit, and the air conditioner indoor unit has an indoor heat exchange unit). They are connected by refrigerant pipes to form a refrigerant circuit, and the refrigerant circuit is provided with a compressor and an electric valve.
  • the compressor is used to adjust the amount of refrigerant circulating in the refrigerant circuit
  • the motor-operated valve is used to adjust the flow rate of refrigerant flowing through the heat exchange unit.
  • a fan for adjusting the flow rate of the air flowing through the heat exchange unit is further provided in each of the air conditioner outdoor unit and the air conditioner indoor unit.
  • the heat exchange amount of the heat exchange unit can be adjusted in one or more of three ways: adjusting the level of the fan to adjust the flow rate of air through the heat exchange unit.
  • the air conditioner one or a plurality of air conditioner indoor units may be connected to one air conditioner outdoor unit, or a plurality of air conditioner indoor units may be connected to a plurality of air conditioner outdoor units. good.
  • a control terminal is further disposed in each air conditioner indoor unit, and the control terminal may be one or more of a wired remote controller, a wireless remote controller, and a mobile terminal. It receives and further controls the operating state of the air conditioner based on the user's command.
  • the fresh-air device includes a fresh-air device indoor unit and a fresh-air device outdoor unit, and a heat exchange unit is provided in each of the fresh-air device outdoor unit and the fresh-air device indoor unit (that is, the fresh-air device outdoor unit a heat exchange unit, and the fresh air device indoor unit has a fresh air heat exchange unit), the two are connected by refrigerant pipes to form a refrigerant circuit, and the refrigerant circuit is provided with a compressor and an electric valve.
  • the compressor is used to adjust the amount of refrigerant circulating in the refrigerant circuit
  • the motor-operated valve is used to adjust the flow rate of refrigerant flowing through the fresh air heat exchange unit.
  • the indoor blower unit of the fresh air device indoor unit is used to adjust the amount of fresh air introduced into the fresh air device, and the fresh air introduced into the fresh air device may be directly sent into the room, The fresh air may be sent into the room after being temperature-controlled by the fresh air heat exchange unit.
  • the amount of heat exchanged in the fresh air heat exchange unit can be adjusted, and the temperature of the fresh air flowing through the fresh air heat exchange unit can be adjusted. Specifically, 1) changing the frequency of the compressor to adjust the amount of refrigerant circulating in the refrigerant circuit, and 2) adjusting the opening of the motor-operated valve to adjust the flow rate of the refrigerant flowing through the fresh air heat exchange unit.
  • one fresh air device outdoor unit may be connected to one or a plurality of fresh air device indoor units, or a plurality of fresh air device outdoor units may be connected to a plurality of fresh air device indoor units. may be connected.
  • a control terminal is further disposed in each fresh air device indoor unit, and the control terminal may be one or more of a wired remote controller, a wireless remote controller, and a mobile terminal. It receives the command and further controls the operating state of the fresh air device based on the user's command, for example, adjusting the fresh air introduction amount, fresh air cooling/heating, fresh air blowing temperature, and the like.
  • the fresh air system introduces fresh air with the indoor blower unit and forms a pressure difference between the indoor and outdoor spaces, allowing the indoor air to flow outside through the gaps in the door windows or ventilation equipment such as an exhaust fan to achieve ventilation.
  • the indoor blower unit includes a DC motor and a fan.
  • AC motors have generally been used in conventional indoor blower units, but AC motors have problems such as high power consumption and low ability to adjust motor rotation speed.
  • the present invention uses a DC motor, which consumes less power than an AC motor at the same rotational speed, and cooperates with a programmable module to realize stepless speed change, increase the speed change range, and increase the amount of fresh air introduced into the indoor blower unit. can ensure precise adjustment to
  • the fresh air system further includes a control unit and a detection unit.
  • the control unit can be communicatively connected to the air conditioner, the fresh air device and the detection unit by wire and/or wireless respectively, for example, the control unit and the detection unit can be wirelessly connected via a router. can be done.
  • the control unit can adjust the operation of the fresh air device and the air conditioner based on the detection result of the detection unit.
  • the detection unit includes one or more of a CO2 sensor, a microparticle sensor, a formaldehyde sensor, a TVOC sensor, a temperature sensor and a humidity sensor, which, in an integrated or distributed manner, can detect indoor air parameters (including indoor air quality) can be transmitted to the control unit.
  • indoor air parameters including indoor air quality
  • Those skilled in the art can choose the type, quantity and model number of sensors according to their needs, use sensor products available in the market, and combine different sensor products for different functions and accuracy requirements.
  • the detection unit is configured in this way, so that the versatility of the detection unit can be improved and the individual use requirements can be met at the same time.
  • the detection unit is located at any location within the indoor area, such as the exhaust vent of a fresh air system, the return air vent of an air conditioner, or a desktop, wall, ground, etc. located within the user's activity area.
  • the air conditioner contains multiple air conditioner indoor units
  • all or part of the air conditioner indoor units can be used in combination with the fresh air device
  • the fresh air device indoor unit can be a plurality of units. It can be used in combination with all or part of the air conditioner indoor units, and when the fresh air device has a plurality of fresh air device indoor units, all or part of the fresh air device indoor units are air-conditioned as needed It can be used in combination with the equipment indoor unit.
  • the air conditioner and the fresh air device in the fresh air system according to the present invention can each have an independent refrigerant circuit.
  • the air conditioner outdoor unit and the air conditioner indoor unit are connected by a refrigerant pipe.
  • the refrigerant circuit of the air conditioner may be formed, and the fresh air device outdoor unit and the fresh air device indoor unit may be connected by a refrigerant pipe to form the refrigerant circuit of the fresh air device.
  • Each device has an air conditioner indoor unit and a fresh air device indoor unit, but both share an outdoor unit. refrigerating circuit may be formed.
  • the indoor blower unit of the indoor unit of the fresh air device is in the OFF state.
  • the indoor blower unit of the present invention uses a DC motor capable of realizing stepless speed change
  • the indoor blower unit of the present invention has a plurality of blowing levels, and the rotation speed of the DC motor corresponding to the lowest blowing level is 0, the indoor blower unit is in the off state, and the higher the blowing level, the higher the rotation speed of the corresponding DC motor and the larger the amount of fresh air introduced. Therefore, in step S5, the control unit can switch the blowing level of the indoor blowing unit based on the second difference value fm .
  • steps S1 to S3 above whether the concentration of CO2 detected by the detection unit is greater than 700 ppm, or PM2.5 is greater than 75 ug/ m3 , or formaldehyde/TVOC is greater than 0.1 mg/ m3 . or if the temperature is higher than 26° C., the first difference value e m is higher than the set value L to turn on the room blower unit.
  • Example 1 For ease of understanding, the present invention provides Example 1 and includes the following steps.
  • the detection unit is a CO2 sensor, which detects the concentration of CO2 and acquires the concentration detection value Zm of CO2 every 5 minutes.
  • the detection unit still detects the concentration of CO2 every 5min, and the control unit calculates a second difference value fm .
  • the control unit switches the blowing level of the indoor blowing unit according to the second difference value fm , and the switching conditions are as follows.
  • the control unit increases the blowing level. If the second difference value fm is greater than 0, the concentration of CO2 is increasing, the current fresh air introduction amount of the indoor blower unit is insufficient to reduce the concentration of CO2 , and the indoor means that the fresh air intake needs to be increased in order to dilute the CO2 of the
  • the control unit keeps the blowing level as it is.
  • the second difference value fm equal to 0 means that the concentration of CO2 is kept within a stable (or low) range, so the current fresh air intake of the room blower unit remains unchanged can do.
  • the control unit reduces the blowing level. If the second difference value fm is less than 0, it means that the concentration of CO 2 is decreasing, and from the point of view of energy saving, the amount of fresh air introduced is appropriately adjusted to avoid too high energy consumption. can be reduced.
  • the present invention controls the turning on of the indoor blower unit based on the first difference value e m , and after the indoor blower unit is turned on, the second Directly adjust the fresh air introduction amount of the indoor blower unit according to the difference value fm , and after such setting, compare the detected value obtained in every cycle with the preset value to obtain the corresponding blowing level , omitting a large amount of complicated calculations, making the algorithm clearer and easier to control, and avoiding frequent opening and closing.
  • step S51 those skilled in the art can set the control unit to increase/decrease the blowing level by N each time as required, where N is a positive is an integer.
  • the control logic is simple, easy to set up, and can be adjusted with simple controls, the increased fresh air intake may be insufficient to reduce the concentration of CO2 .
  • Step S51 includes S511 in which the control unit calculates the fresh air increase amount ⁇ Fan based on the second difference value fm , and then determines the blowing level based on the fresh air increase amount ⁇ Fan,
  • the formula for calculating the fresh air increase amount ⁇ Fan is where the correction amount n>0.
  • the correction amount n can be set to a variable related to the first difference value e m obtained in the current cycle, for the range of values e m ⁇
  • e m the first difference value obtained in the current cycle
  • the present invention further provides Embodiment 2, the difference between Embodiment 2 and Embodiment 1 is that step S52 is used to replace step S51. to substitute.
  • step S52 the control unit adjusts the correction amount based on the detected value, the first difference value, and the second difference value, and calculates the first difference value, the second difference value, and the adjusted correction amount as PID Substitute into the algorithm formula to obtain the fresh air increase amount ⁇ Fan, then switch the ventilation level of the indoor blower unit based on the fresh air increase amount ⁇ Fan, and adjust the fresh air introduction amount of the indoor blower unit.
  • the PID algorithm formula is where S is the period, specifically 5 min, Si is a predetermined parameter value, specifically 3, and kp, n, ki, kd are the correction quantity.
  • the correction amount n is a variable related to the first difference value e m obtained in the current period, and taking the concentration of CO 2 as an example, If the first difference value e m obtained in the current cycle is within a first set range, for example e m is between ⁇ 100 ppm and 0 ppm, then the larger the e m , the more CO 2 detected in the current cycle. approaches the preset value Z0 . At this time, n increases with increasing em , and the amount of change in air blow level correspondingly increases with increasing em , ensuring that the room blower unit is turned on earlier.
  • n is a constant value greater than 0, such as 1 .7), which varies with e m and does not further affect the blast level, If e m is less than ⁇ 100 ppm, it means that the concentration of CO 2 in the current period is much less than the preset value Z 0 , at which time n is 0, which does not affect the change of blast level. .
  • the correction amount kp is a variable related to the second difference value fm obtained in the current cycle, and taking the concentration of CO 2 as an example, If the second difference value fm between the first difference value e m obtained in the current cycle and the first difference value e m ⁇ 1 obtained in the immediately preceding cycle is within the first set range , for example f m between ⁇ 10 ppm and 10 ppm, the difference between the concentration values of CO 2 detected in two adjacent periods is rather small, i.e. the concentration of CO 2 is within a stable numerical range.
  • the concentration value of CO 2 detected in the current cycle is the concentration value of CO 2 detected in the previous cycle. It can be seen that the lower the concentration value and the smaller fm , the faster the concentration of CO2 decreases, at which time kp increases with decreasing fm , and correspondingly, the blast level also decreases with fm .
  • f m is within the third set range, for example, if f m is between 10 ppm and 50 ppm, the concentration value of CO 2 detected in the current cycle is higher than the concentration value of CO 2 detected in the previous cycle. It can be seen that the higher the fm , the faster the concentration of CO2 rises, at which time kp increases with increasing fm , and correspondingly, the blast level also increases with increasing fm . increases with If the absolute value of f m exceeds a certain value, for example, greater than 50 ppm or less than ⁇ 50 ppm, it can be seen that the concentration of CO 2 in the current period changes rapidly, considering the operating noise of the indoor blower unit.
  • the correction amount ki is a variable related to the detected value Zm acquired in the current period, and taking the concentration of CO 2 as an example, If the detected value Z m obtained in the current cycle is within the first set range, for example, if Z m is between 750 ppm and 850 ppm, the concentration of CO 2 detected in the current cycle is less than the preset value Z 0 It can be seen that there is a small fluctuation in the vicinity, at this time ki is 0, and does not affect the change in the blowing level, If Z m is within the second set range, for example Z m is between 600 ppm and 750 ppm, we know that the concentration of CO 2 detected in the current cycle is less than the preset value Z 0 , then: ki decreases with increasing Zm , If Z m is within the third set range, for example, if Z m is between 850 ppm and 1200 ppm, it is known that the concentration value of CO2 detected in the current cycle is greater than the preset
  • concentration of CO2 as an example, If the third difference value g m obtained in the current cycle is within the first set range, for example g m is between ⁇ 2 ppm and 2 ppm, the concentration of CO 2 detected in the three adjacent cycles It can be seen that the difference between the values is small, i.e.
  • the concentration of CO 2 is in a stable numerical range, when kd is 0 and has no effect on changes in blast level, If g m is within the second set range, for example, if g m is ⁇ 10 ppm to ⁇ 2 ppm, the CO 2 concentration change value of the current two cycles is the CO 2 concentration change of the previous two cycles.
  • g m increases with If the absolute value of g m exceeds a certain value, for example, greater than 10 ppm or less than -10 ppm, it can be seen that the concentration of CO 2 changes rapidly, considering the operating noise of the indoor blower unit, at this time
  • the formula (2) shows the degree of change in the detection value, the first difference value, the second difference value, and the second difference value in different cycles (that is, the third difference value) ⁇ Fan can be comprehensively calculated based on, and when the detected value is smaller than the preset value, the fresh air introduction amount decreases as the detected value decreases, and the detected value fluctuates near the preset value , the fresh air introduction rate is maintained as it is, and the detected value is allowed to fluctuate reasonably, and when the detected value is greater than the preset value, the fresh air introduction rate increases as the detected value increases. This makes the adjustment control of the fresh air introduction more precise and intelligent, realizes the improvement of the energy saving of the fresh air system, and reduces the user's usage cost.
  • the indoor Further includes step S401 of turning off the blower unit.
  • the first set time period t1 is longer than the period S.
  • the OFF condition of the indoor blower unit set in step S401 is more first In order to turn off the indoor blower unit in consideration of the difference value of In this way, the repeated opening and closing phenomenon of the indoor blower unit caused by the up and down fluctuation of the detection value can be effectively reduced, thereby improving the user's comfort and extending the service life of the fresh air system.
  • the control unit updates the detection value obtained by the detection unit within the second set time period t2. Based on this, predict the detection value that can be obtained after the detection unit continues to operate for the third set time period t3, obtain the prediction value of the detection result, and then the prediction value of the detection result and the current cycle Further includes step S402 of calculating a fourth difference value from the acquired detection value.
  • the fourth difference value is greater than 0, it means that the current fresh air introduction amount of the indoor blower unit is insufficient to reduce the detection result within the third set time period t3, and the control unit , the fresh air intake of the indoor blower unit should be increased.
  • step S5 is continued.
  • the control unit when the communication of the detection unit is abnormal, the control unit maintains the fresh air introduction amount of the indoor blower unit within the fourth set time period t4, and then turns off the indoor blower unit.
  • This setting ensures that the fresh air system will continue to work within a certain period of time after the communication failure of the detection unit, improve the indoor air quality, and then be turned off in a timely manner. It can not only improve the user's using experience, but also reduce the energy consumption of the fresh air system and reduce the user's using cost.
  • the fresh air system adjusts the amount of fresh air introduced based on the indoor air quality detection value.
  • the control unit can also detect the PM2.5 concentration value detected by the microparticle sensor, the formaldehyde concentration value detected by the formaldehyde sensor, the TVOC concentration value detected by the TVOC sensor. , the difference value between the indoor and outdoor temperatures detected by the temperature sensor, and the difference value between the indoor and outdoor humidity detected by the humidity sensor. It can satisfy the user's sensory comfort and at the same time reduce the operating energy consumption of the fresh air system and reduce the user's usage cost. And the fresh air system can also adjust the fresh air introduction quantity and the fresh air introduction temperature at the same time, further improving the user's perceived comfort and saving energy consumption.
  • the fresh air device of the fresh air system ensures the indoor air quality and improves the user's comfort by introducing fresh air according to the indoor air quality situation.
  • the temperature difference between indoors and outdoors is small.
  • the indoor blower unit of the equipment indoor unit can introduce fresh air, but the refrigerant circuit of the fresh air equipment does not operate, ie does not temperature-condition the introduced fresh air.
  • the temperature difference between indoors and outdoors is large, so adjusting the amount of fresh air introduction will not only affect the user's experience, but also affect the overall energy consumption of the fresh air system.
  • the blowing air temperature of the fresh air device indoor unit by adjusting the operating state of the fresh air device before sending fresh air into the room. Specifically, by adjusting the amount of refrigerant circulating in the refrigerant circuit of the fresh air device and/or adjusting the flow rate of refrigerant flowing through the fresh air heat exchange unit, the heat of the fresh air flowing through the fresh air heat exchange unit is adjusted. The exchange amount can be adjusted.
  • the air conditioner indoor unit receives the set temperature T transmitted from the control terminal. After confirming that T is 24°C, the control unit adjusts the blowing temperature of the fresh air introduced into the indoor blowing unit based on the set temperature T, preferably setting the blowing temperature of the indoor blowing unit to 24°C. , thus ensuring that the fresh air temperature fed into the room matches the room temperature, thereby improving the comfort of the user and the energy efficiency of the fresh air system.
  • the installation position of the temperature sensor in the fresh air unit indoor unit, the amount of fresh air, the length of the air duct, etc. all lead to deviations in the air temperature
  • the air blowing temperature of the indoor blower unit is slightly higher than the set temperature T of the air conditioner, for example by 1°C. It can be adjusted to be higher, ensuring that the blowing temperature of the indoor blowing unit is close to the set temperature T of the air conditioner, thereby further improving the user's comfort and the energy saving of the fresh air system.
  • the detection unit includes an indoor temperature sensor that detects the indoor temperature T1 and an outdoor temperature sensor that detects the outdoor temperature T2. Adjust the operating state of the air heat exchange unit.
  • ⁇ set value T0 the temperature difference between the indoor and outdoor is small at this time, and even if fresh air is introduced, the indoor temperature will fluctuate. , the motorized valve is turned off, ie the fresh air is not temperature conditioned by the fresh air heat exchange unit of the fresh air system. If
  • the greater the set value T0 the greater the degree of heat exchange of the fresh air heat exchange unit.
  • the opening of the motor-operated valve the flow rate of the refrigerant flowing through the fresh air heat exchange unit is increased, and/or by adjusting the frequency of the compressor, the amount of refrigerant circulating in the refrigerant circuit is adjusted to produce the new air. It is possible to improve the heat exchange amount of the air device and further adjust the air temperature of the fresh air device indoor unit.
  • the air conditioner of the fresh air system can have a plurality of air conditioner indoor units, and the plurality of air conditioner indoor units can be installed in different rooms or different indoor areas respectively.
  • each air conditioner indoor unit has a set temperature
  • the control unit adjusts the blowing temperature of the fresh air introduced into the indoor blowing unit according to the average value of the set temperatures, thus
  • the blowing temperature of the indoor blower unit can be maximally approached to the set temperature of most air conditioner indoor units, thereby ensuring the perceived comfort of users in different rooms or different indoor areas, while providing fresh air.
  • the average value of the set temperatures of the plurality of air conditioner indoor units is the average value of the set temperatures of the air conditioner indoor units that are in operation among the plurality of air conditioner indoor units.
  • the indoor blower unit can finely adjust the temperature of the fresh air introduced into the fresh air device by cooperatively controlling the fresh air device and the air conditioner, thereby ensuring the comfort of the user and the fresh air system. energy saving effect.

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JPH0886501A (ja) * 1994-09-19 1996-04-02 Toshiba Corp 空気調和機
JP2010243090A (ja) * 2009-04-07 2010-10-28 Mitsubishi Electric Corp 空気調和システム及び遠隔監視装置
CN107631425A (zh) * 2017-09-04 2018-01-26 青岛海尔空调器有限总公司 一种空调温湿双控的方法及装置
WO2020195338A1 (ja) * 2019-03-26 2020-10-01 パナソニックＩｐマネジメント株式会社 空調システムコントローラ
JP6892179B1 (ja) * 2020-03-19 2021-06-23 株式会社Ｆｈアライアンス 空調システム

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CN103196214B (zh) * 2013-04-08 2015-05-06 青岛海信日立空调系统有限公司 控制空调室内机的方法及空调室内机
CN106500270B (zh) * 2016-11-09 2019-02-12 珠海格力电器股份有限公司 新风空调的控制方法、装置和新风空调
CN107655108B (zh) * 2017-09-20 2020-11-10 广东美的制冷设备有限公司 空调器与空调器的控制方法
CN111780335B (zh) * 2020-06-01 2021-08-31 宁波奥克斯电气股份有限公司 一种新风系统控制方法、装置及空调器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0886501A (ja) * 1994-09-19 1996-04-02 Toshiba Corp 空気調和機
JP2010243090A (ja) * 2009-04-07 2010-10-28 Mitsubishi Electric Corp 空気調和システム及び遠隔監視装置
CN107631425A (zh) * 2017-09-04 2018-01-26 青岛海尔空调器有限总公司 一种空调温湿双控的方法及装置
WO2020195338A1 (ja) * 2019-03-26 2020-10-01 パナソニックＩｐマネジメント株式会社 空調システムコントローラ
JP6892179B1 (ja) * 2020-03-19 2021-06-23 株式会社Ｆｈアライアンス 空調システム

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