CN109612010B - Control method and device of fresh air system and fresh air system - Google Patents

Control method and device of fresh air system and fresh air system Download PDF

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Publication number
CN109612010B
CN109612010B CN201811501292.1A CN201811501292A CN109612010B CN 109612010 B CN109612010 B CN 109612010B CN 201811501292 A CN201811501292 A CN 201811501292A CN 109612010 B CN109612010 B CN 109612010B
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concentration
fan
cooling water
gear
fresh air
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CN109612010A (en
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曹磊
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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    • 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
    • F24F11/62—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
    • 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
    • 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
    • F24F2110/20—Humidity
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fluid Mechanics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a control method and a device of a fresh air system and the fresh air system, wherein the control method of the fresh air system comprises the following steps: judging whether the concentration of the indoor carbon dioxide is smaller than a preset concentration threshold value or not, if so, controlling the cooling water spraying device to stop spraying, starting the fan and setting a gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; the cooling water spray device is controlled according to the cooling load and the temperature of the cooling water. According to the control method and device of the fresh air system and the fresh air system, when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started, and the ventilation pipeline can be prevented from being mildewed; the temperature of the fresh air supply can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.

Description

Control method and device of fresh air system and fresh air system
Technical Field
The invention relates to the technical field of electric appliances, in particular to a control method and device of a fresh air system and the fresh air system.
Background
Along with the improvement of living standard of people, the demand for fresh air is more and more strong.
In the related art, the fresh air system is usually of an all-heat exchanger type, and the fresh air is cooled/heated by utilizing residual cold/residual heat exhausted to outdoor air, but the fresh air system is complex in structure and high in cost. And the fresh air system without the total heat exchanger cannot cool the fresh air entering the room. In addition, when the humidity in the ventilation pipeline of the fresh air system is high, the ventilation pipeline of the fresh air system is easy to mildew.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the first objective of the present invention is to provide a control method of a fresh air system, which determines whether to start a fan and sets a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in a ventilation duct; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
The second purpose of the invention is to provide a control device of the fresh air system.
The third purpose of the invention is to provide a fresh air system.
A fourth object of the invention is to propose an electronic device.
A fifth object of the invention is to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for a fresh air system, where the fresh air system includes: the control method comprises the following steps of arranging a cooling water spraying device in a ventilating pipeline between an outdoor air inlet device and an indoor air outlet device, and arranging a humidity sensor at a maximum humidity measuring point in the ventilating pipeline, wherein the cooling water spraying device is used for atomizing input cooling water, the humidity sensor is used for detecting the humidity in the ventilating pipeline, and the cooling water is condensed water generated in the refrigerating process of the air conditioner, and the control method comprises the following steps:
periodically acquiring the concentration of indoor carbon dioxide;
judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not;
if the humidity is equal to or greater than a preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting a fan, and setting a gear when the fan is started as a set gear;
if not, starting the fan, and determining a gear when the fan is started according to the concentration of the carbon dioxide;
acquiring a cold load required by fresh air cooling of the fresh air system according to the gear when the fan is started;
acquiring the temperature of the cooling water;
calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water;
controlling the cooling water spraying device according to the spraying frequency.
According to the control method of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not; if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; acquiring the temperature of cooling water; calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water; the cooling water spraying device is controlled according to the spraying frequency. Determining whether to start the fan and setting a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in the ventilation pipeline; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
According to one embodiment of the invention, the set gear is the lowest gear of the fan.
According to an embodiment of the present invention, the control method further includes: if so, controlling the cooling water spraying device to stop spraying and not starting the fan if the humidity is smaller than the humidity threshold value.
According to an embodiment of the present invention, the determining the gear when the fan is turned on according to the concentration of the carbon dioxide includes: determining a concentration grade or a concentration interval corresponding to the concentration of the carbon dioxide according to the concentration of the carbon dioxide; and determining the gear when the fan is started according to the concentration grade or the concentration interval.
According to an embodiment of the present invention, the determining the gear when the fan is turned on according to the concentration level or the concentration interval includes: the higher the concentration of the carbon dioxide corresponding to the concentration grade or the concentration interval is, the larger the gear when the fan is started is.
According to an embodiment of the present invention, the acquiring a cooling load required by fresh air cooling of the fresh air system according to the gear when the fan is turned on includes: acquiring an outdoor environment temperature and an indoor environment temperature; and calculating to obtain the cold load according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started.
In order to achieve the above object, a second embodiment of the present invention provides a control device for a fresh air system, where the fresh air system includes: the cooling water spraying device is arranged in a ventilating pipeline between an outdoor air inlet device and an indoor air outlet device, and the humidity sensor is arranged at a maximum humidity measuring point in the ventilating pipeline, the cooling water spraying device is used for atomizing input cooling water, the humidity sensor is used for detecting the humidity in the ventilating pipeline, the cooling water is condensed water generated in the refrigerating process of the air conditioner, and the control device comprises:
the first acquisition module is used for periodically acquiring the concentration of indoor carbon dioxide;
the judging module is used for judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not;
the starting setting module is used for controlling the cooling water spraying device to stop spraying, starting the fan and setting a gear when the fan is started as a set gear if the humidity is equal to or greater than a preset humidity threshold;
the starting determining module is used for starting the fan if the carbon dioxide is not in the preset range, and determining the gear when the fan is started according to the concentration of the carbon dioxide;
the second acquisition module is used for acquiring the cold load required by the fresh air cooling of the fresh air system according to the gear when the fan is started;
the third acquisition module is used for acquiring the temperature of the cooling water;
the calculation module is used for calculating the spraying frequency of the cooling water spraying device according to the cold load and the temperature of the cooling water;
and the control module is used for controlling the cooling water spraying device according to the spraying frequency.
According to the control device of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not; if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; acquiring the temperature of cooling water; calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water; the cooling water spraying device is controlled according to the spraying frequency. Determining whether to start the fan and setting a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in the ventilation pipeline; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
According to one embodiment of the invention, the set gear is the lowest gear of the fan.
According to an embodiment of the present invention, the opening setting module is further configured to: if so, controlling the cooling water spraying device to stop spraying and not starting the fan if the humidity is smaller than the humidity threshold value.
According to an embodiment of the present invention, the start determining module is specifically configured to: determining a concentration grade or a concentration interval corresponding to the concentration of the carbon dioxide according to the concentration of the carbon dioxide; and determining the gear when the fan is started according to the concentration grade or the concentration interval.
According to an embodiment of the present invention, the start determining module is specifically configured to: the higher the concentration of the carbon dioxide corresponding to the concentration grade or the concentration interval is, the larger the gear when the fan is started is.
According to an embodiment of the present invention, the second obtaining module is specifically configured to: acquiring an outdoor environment temperature and an indoor environment temperature; and calculating to obtain the cold load according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started.
In order to achieve the above object, a third aspect of the present invention provides a fresh air system, including: the control device of the fresh air system according to the embodiment of the second aspect of the invention.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the control method of the fresh air system comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the fresh air system is realized.
To achieve the above object, a fifth embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the control method of the fresh air system according to the first embodiment of the present invention.
Drawings
FIG. 1 is a block diagram of a fresh air system according to one embodiment of the present invention;
FIG. 2 is a flow chart of a control method of a fresh air system according to one embodiment of the present invention;
FIG. 3 is a flow chart of a control method of a fresh air system according to another embodiment of the present invention;
FIG. 4 is a flow chart of a control method of a fresh air system according to another embodiment of the present invention;
FIG. 5 is a detailed flow chart of a control method of the fresh air system according to an embodiment of the invention;
FIG. 6 is a block diagram of a fresh air system control device according to one embodiment of the present invention;
FIG. 7 is a block diagram of a fresh air system according to one embodiment of the present invention;
FIG. 8 is a block diagram of an electronic device in accordance with one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a control method and device of a fresh air system and the fresh air system according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 is a structural diagram of a fresh air system according to an embodiment of the present invention, and as shown in fig. 1, the fresh air system includes: the outdoor air inlet device 13 is used for extracting outdoor air into a ventilation pipeline of the fresh air system; the indoor air outlet device 14 is used for sending the fresh air processed by the fresh air system to the indoor; the first filter screen 15, the second filter screen 16 and the third filter screen 17 are sequentially arranged in the ventilation pipeline along the direction from air inlet to air outlet, the first filter screen 15 is used for filtering particulate matters in air entering the ventilation pipeline, the second filter screen 16 is used for carrying out secondary filtration on the air filtered by the first filter screen 15, and the third filter screen 17 is used for carrying out sterilization treatment on the air filtered by the second filter screen 16; a cooling water pretreatment device 12 for pretreating the cooling water and delivering the pretreated cooling water to the cooling water spraying device 11; a cooling water spraying device 11 for spraying cooling water, wherein, as shown in fig. 1, the cooling water spraying device 11 may be disposed at the top of the ventilation duct, may be disposed in the ventilation duct between the outdoor air intake device 13 and the indoor air outlet device 14, and specifically may be disposed between the first filter screen 15 and the second filter screen 16; and a humidity sensor 18 for detecting humidity in the ventilation duct, wherein the humidity sensor is disposed at a maximum humidity detection point in the ventilation duct, and specifically, as shown in fig. 1, the humidity sensor 18 may be disposed on a side surface of the second filter 16 close to the first filter 15.
Fig. 2 is a flowchart of a control method of a fresh air system according to an embodiment of the present invention, and as shown in fig. 2, the control method of the fresh air system includes:
s101, periodically acquiring the concentration of carbon dioxide in a room.
In an embodiment of the present invention, the fresh air system includes: the air conditioner comprises a cooling water spraying device arranged in an air pipeline between an outdoor air inlet device and an indoor air outlet device and a humidity sensor arranged at a maximum humidity measuring point in the air pipeline, wherein the cooling water spraying device is used for spraying input cooling water, the humidity sensor is used for detecting the humidity in the air pipeline, and the cooling water is condensed water generated in the refrigerating process of the air conditioner, namely water which is low in temperature and used for cooling fresh air of a fresh air system. Can set up concentration sensor in the indoor side of new trend system, through the concentration sensor periodic acquisition indoor carbon dioxide's concentration.
And S102, judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value.
In the embodiment of the invention, a concentration threshold value can be preset, the concentration threshold value can be a critical value that the concentration of carbon dioxide is low, and when the concentration of indoor carbon dioxide is lower than the concentration threshold value, the concentration of indoor carbon dioxide is low, and indoor air does not need to be purified and ventilated. After the concentration of the carbon dioxide in the room is acquired in the step S101, the concentration of the carbon dioxide is compared with a concentration threshold, and whether the concentration of the carbon dioxide is less than a preset concentration threshold is determined.
S103, if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear.
In the embodiment of the present invention, a humidity threshold may be preset, where the humidity threshold may be a critical value at which mildew occurs in the ventilation duct, and when the humidity in the ventilation duct is equal to or greater than the humidity threshold, the mildew may occur in the ventilation duct, where the humidity in the ventilation duct may be detected and acquired by a humidity sensor as shown in fig. 1. If the concentration of the carbon dioxide is judged to be less than the preset concentration threshold value in the S102 step, and the humidity in the ventilation pipeline is detected to be equal to or greater than the preset humidity threshold value, it is indicated that the indoor air does not need to be purified and ventilated, but the ventilation pipeline is likely to mildew, the cooling water spraying device is controlled to stop spraying, the fan is started, the gear when the fan is started is set as a set gear, and the mildew in the ventilation pipeline is prevented, wherein the fan can be started when the fan is started to be in a closed state; or when the fan is started, the fan is kept in a starting state; the spray stopping can be that when the current cooling water spray device is in a spray state, the spray is stopped; the non-spraying state may be maintained when the cooling water spraying apparatus is currently in the non-spraying state. As a feasible implementation manner, the set gear can be specifically the lowest gear of the fan, so that the power consumption can be reduced while the ventilation pipeline is prevented from mildewing.
And S104, if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide.
In the embodiment of the present invention, if it is determined in step S102 that the concentration of carbon dioxide is equal to or greater than the preset concentration threshold, it indicates that indoor air needs to be purified and ventilated, the fan is turned on, and the gear when the fan is turned on is determined. As a possible implementation manner, a mapping relationship between the concentration of the carbon dioxide and the gear when the fan is turned on may be established in advance, and when it is determined in step S102 that the concentration of the carbon dioxide is equal to or greater than the preset concentration threshold, the mapping relationship is queried, so that the gear when the fan is turned on may be determined.
And S105, acquiring a cooling load required by fresh air cooling of the fresh air system according to the gear when the fan is started.
In the embodiment of the invention, when indoor air needs to be purified and ventilated, namely the concentration of carbon dioxide is judged to be equal to or greater than the preset concentration threshold value in the step S102, the cold load required by fresh air cooling of the fresh air system can be calculated according to the gear when the fan is started.
And S106, acquiring the temperature of the cooling water.
In the embodiment of the present invention, a temperature sensor may be provided in the cooling water pretreatment device or the cooling water spraying device shown in fig. 1, and the temperature of the cooling water may be obtained by the temperature sensor. As a feasible implementation manner, the cooling water can be specifically condensed water generated in the air conditioner in the refrigeration process, the sensible heat and the latent heat of evaporation of the condensed water are utilized to efficiently recycle the cold energy of the condensed water of the air conditioner, and the pollution of the condensed water to the environment can be reduced.
And S107, calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water.
In the embodiment of the present invention, after the cooling load and the temperature of the cooling water are obtained, the spraying frequency of the cooling water spraying apparatus is calculated according to the cooling load and the temperature of the cooling water, and specifically, the spraying frequency may be obtained by using a formula: spray frequency is the cooling power of the cooling load/single spray.
And S108, controlling the cooling water spraying device according to the spraying frequency.
In the embodiment of the present invention, the cooling water spraying device is controlled to spray according to the spraying frequency obtained in step S107, thereby cooling the air in the ventilation duct.
Further, the control method of the fresh air system further comprises the following steps: if the humidity is smaller than the humidity threshold value, the cooling water spraying device is controlled to stop spraying, and the fan is not started.
In the embodiment of the present invention, if it is determined in step S102 that the concentration of carbon dioxide is less than the preset concentration threshold and it is detected that the humidity in the ventilation duct is less than the preset humidity threshold, it indicates that indoor air does not need to be purified and ventilated and the ventilation duct does not mildew, and then the cooling water spraying device is controlled to stop spraying without turning on the fan. Wherein, the fan is closed when the fan is in the open state without opening the fan; or when the fan is closed, the fan is kept in a closed state; the spray stopping can be that when the current cooling water spray device is in a spray state, the spray is stopped; the non-spraying state may be maintained when the cooling water spraying apparatus is currently in the non-spraying state.
According to the control method of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not; if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; acquiring the temperature of cooling water; calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water; the cooling water spraying device is controlled according to the spraying frequency. Determining whether to start the fan and setting a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in the ventilation pipeline; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
Fig. 3 is a flowchart of a control method of a fresh air system according to another embodiment of the present invention, and as shown in fig. 3, on the basis of the embodiment shown in fig. 2, the step S104 of "determining a gear when the fan is turned on according to a concentration of carbon dioxide" may specifically include:
s201, determining a concentration level or a concentration interval corresponding to the concentration of the carbon dioxide according to the concentration of the carbon dioxide.
In the embodiment of the invention, the carbon dioxide concentration grade or the concentration interval can be divided in advance, after the indoor carbon dioxide concentration is obtained, the carbon dioxide concentration is compared with the carbon dioxide concentration grade or the concentration interval which is divided in advance, the concentration grade corresponding to the carbon dioxide concentration is the concentration grade, or the interval in which the carbon dioxide concentration falls is the concentration interval corresponding to the carbon dioxide concentration. For example, the carbon dioxide concentration level may be classified in advance into a low concentration level, a medium-high concentration level, and a high concentration level, or the carbon dioxide concentration may be classified in advance into a low concentration section, a medium-high concentration section, and a high concentration section.
And S201, determining a gear when the fan is started according to the concentration level or the concentration interval.
In the embodiment of the invention, after the concentration level or the concentration interval is acquired in the step S201, the gear when the fan is turned on is determined according to the concentration level or the concentration interval. As a possible implementation manner, the higher the concentration of the carbon dioxide corresponding to the concentration level or the concentration interval is, the larger the gear when the fan is turned on is.
According to the control method of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; and determining the gear when the fan is started according to the concentration of the carbon dioxide. The gear when the fan is started is determined according to the concentration of indoor carbon dioxide, the gear when the fresh air system is started can be accurately controlled, and meanwhile, the method has the advantages of being simple to implement and low in cost.
Fig. 4 is a flowchart of a control method of a fresh air system according to another embodiment of the present invention, and as shown in fig. 4, based on the embodiment shown in fig. 2, the step S105 of "acquiring a cooling load required by fresh air cooling of the fresh air system" may specifically include:
s301, obtaining the outdoor environment temperature and the indoor environment temperature.
In the embodiment of the invention, the outdoor side and the indoor side of the fresh air system can be provided with the temperature sensors, and the outdoor environment temperature and the indoor environment temperature can be obtained through the temperature sensors.
And S302, calculating to obtain the cold load according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started.
In the embodiment of the invention, after the outdoor environment temperature and the indoor environment temperature are obtained in the step S301, the cooling load is calculated according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started. Specifically, the cooling load can be calculated by using a formula: q ═ cp · (ρ)Air (a)V) · (T4-T1), wherein q is the cooling load; v is the fresh air volume flow corresponding to the gear of the fan; t4 is outdoor ambient temperature; t1 is the indoor ambient temperature; cp is the constant pressure specific heat capacity of air; rhoAir (a)Is the air density.
According to the control method of the fresh air system provided by the embodiment of the invention, the cooling load required by fresh air cooling of the fresh air system can be accurately and effectively calculated according to the outdoor environment temperature and the indoor environment temperature.
The following describes the control method of the fresh air system in an embodiment of the present invention in detail by taking the concentration level (interval) as a low concentration level (interval), a medium concentration level (interval), and a high concentration level (interval) as examples, fig. 5 is a specific flowchart of the control method of the fresh air system according to an embodiment of the present invention, and as shown in fig. 5, the control method of the fresh air system may specifically include:
s401, periodically acquiring the concentration n of carbon dioxide in the room.
S402, judging whether n is less than a concentration threshold value.
If yes, go to step S403; if not, the process proceeds to step S406.
And S403, judging whether the humidity is equal to or greater than a preset humidity threshold value.
If yes, go to step S404; if not, the process proceeds to step S405.
S404, controlling the cooling water spraying device to stop spraying, starting the fan, setting the gear when the fan is started as a set gear, and returning to the step S403.
And S405, controlling the cooling water spraying device to stop spraying without starting a fan.
And S406, determining a concentration level (section) corresponding to the concentration n of the carbon dioxide according to the concentration n of the carbon dioxide.
When the density level (section) corresponding to n is a low density level (section), the process proceeds to step S407;
when the concentration level (section) corresponding to n is a medium concentration level (section), the process proceeds to step S408;
when the density level (section) corresponding to n is a high density level (section), the process proceeds to step S409.
S407, starting the fan, controlling the fan to be in the gear 1, and entering the step S410.
S408, starting the fan, controlling the fan to be in the gear 2, and entering the step S410.
S409, the fan is started, the fan gear is controlled to be gear 3, and the step S410 is entered.
In the embodiment of the invention, the gears from the gear 1 to the gear 3 of the fan are gradually increased.
And S410, acquiring the outdoor environment temperature and the indoor environment temperature.
And S411, calculating to obtain the cold load according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started.
S412, acquiring the temperature of the cooling water.
And S413, calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water.
And S414, controlling the cooling water spraying device according to the spraying frequency.
According to the control method of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not; if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; acquiring the temperature of cooling water; calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water; the cooling water spraying device is controlled according to the spraying frequency. Determining whether to start the fan and setting a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in the ventilation pipeline; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
Fig. 6 is a structural diagram of a fresh air system control device according to an embodiment of the present invention, the fresh air system including: the cooling water atomizer that sets up in the air pipe between outdoor hot blast blowpipe apparatus and the indoor air-out device and the humidity transducer of setting the biggest humidity measurement point in air pipe, cooling water atomizer is used for atomizing the cooling water of input, and humidity transducer is used for detecting the humidity in the air pipe, and the cooling water is the comdenstion water that the air conditioner produced in the refrigeration process, as shown in figure 6, this new trend system control device includes:
the first acquisition module 21 is used for periodically acquiring the concentration of indoor carbon dioxide;
the judging module 22 is configured to judge whether the concentration of the carbon dioxide is smaller than a preset concentration threshold;
the starting setting module 23 is used for controlling the cooling water spraying device to stop spraying, starting the fan and setting a gear when the fan is started as a set gear if the humidity is equal to or greater than a preset humidity threshold;
the starting determining module 24 is used for starting the fan if the carbon dioxide is not in the air supply, and determining the gear when the fan is started according to the concentration of the carbon dioxide;
the second obtaining module 25 is configured to obtain a cooling load required by fresh air cooling of the fresh air system according to a gear when the fan is turned on;
a third obtaining module 26, configured to obtain a temperature of the cooling water;
a calculating module 27, configured to calculate a spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water;
and a control module 28 for controlling the cooling water spraying device according to the spraying frequency.
It should be noted that the explanation of the embodiment of the fresh air system control method is also applicable to the fresh air system control device of the embodiment, and is not repeated here.
According to the control device of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not; if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; acquiring the temperature of cooling water; calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water; the cooling water spraying device is controlled according to the spraying frequency. Determining whether to start the fan and setting a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in the ventilation pipeline; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
Further, in a possible implementation manner of the embodiment of the present invention, the set gear is a lowest gear of the fan.
Further, in a possible implementation manner of the embodiment of the present invention, the start setting module 23 is further configured to: if the humidity is smaller than the humidity threshold value, the cooling water spraying device is controlled to stop spraying, and the fan is not started.
Further, in a possible implementation manner of the embodiment of the present invention, the cooling water is condensed water generated in a cooling process of the air conditioner.
Further, in a possible implementation manner of the embodiment of the present invention, the start determining module 24 is specifically configured to: determining a concentration grade or a concentration interval corresponding to the concentration of the carbon dioxide according to the concentration of the carbon dioxide; and determining the gear when the fan is started according to the concentration grade or the concentration interval.
Further, in a possible implementation manner of the embodiment of the present invention, the start determining module 24 is specifically configured to: the higher the concentration of the carbon dioxide corresponding to the concentration grade or the concentration interval is, the larger the gear when the fan is started is.
Further, in a possible implementation manner of the embodiment of the present invention, the second obtaining module 25 is specifically configured to: acquiring outdoor environment temperature, indoor environment temperature and a gear when a fan is started; and calculating to obtain the cold load according to the outdoor environment temperature and the indoor environment temperature.
It should be noted that the explanation of the embodiment of the fresh air system control method is also applicable to the fresh air system control device of the embodiment, and is not repeated here.
According to the control device of the fresh air system provided by the embodiment of the invention, the concentration of indoor carbon dioxide is periodically obtained; judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not; if the humidity is equal to or greater than the preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting the fan, and setting the gear when the fan is started as a set gear; if not, starting the fan, and determining the gear when the fan is started according to the concentration of the carbon dioxide; acquiring a cold load required by fresh air cooling of a fresh air system according to a gear when a fan is started; acquiring the temperature of cooling water; calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water; the cooling water spraying device is controlled according to the spraying frequency. Determining whether to start the fan and setting a gear when the fan is started according to the concentration of indoor carbon dioxide and the humidity in the ventilation pipeline; and calculating the spraying frequency of the cooling water spraying device according to the cooling load required by fresh air cooling and the temperature of the cooling water, and controlling the cooling water spraying device to spray according to the spraying frequency. The opening and the gear position of the fresh air system can be accurately controlled, and when the indoor carbon dioxide concentration is low but the humidity in the ventilation pipeline is high, the fan is started to supply air, so that the ventilation pipeline can be prevented from mildewing; the cooling water spraying mode is adopted, so that the fresh air supply temperature can be accurately reduced; meanwhile, the method also has the advantages of simple implementation and low cost.
In order to implement the above embodiment, an embodiment of the present invention further provides a fresh air system 30, as shown in fig. 7, including: the control device 31 of the fresh air system shown in the above embodiment.
In order to implement the foregoing embodiment, the embodiment of the present invention further provides an electronic device 40, as shown in fig. 8, which includes a memory 41 and a processor 42. The memory 41 stores a computer program that can be executed on the processor 42, and the processor 42 executes the program to implement the control method of the fresh air system as described in the above embodiments.
In order to implement the foregoing embodiments, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the control method of the fresh air system as described in the foregoing embodiments is implemented.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (15)

1. A control method of a fresh air system is characterized in that the fresh air system comprises: the control method comprises the following steps of arranging a cooling water spraying device in a ventilating pipeline between an outdoor air inlet device and an indoor air outlet device, and arranging a humidity sensor at a maximum humidity measuring point in the ventilating pipeline, wherein the cooling water spraying device is used for atomizing input cooling water, the humidity sensor is used for detecting the humidity in the ventilating pipeline, and the cooling water is condensed water generated in the refrigerating process of the air conditioner, and the control method comprises the following steps:
periodically acquiring the concentration of indoor carbon dioxide;
judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not;
if the humidity is equal to or greater than a preset humidity threshold value, controlling the cooling water spraying device to stop spraying, starting a fan, and setting a gear when the fan is started as a set gear to prevent the ventilation pipeline from mildewing;
if not, starting the fan, and determining a gear when the fan is started according to the concentration of the carbon dioxide;
acquiring a cold load required by fresh air cooling of the fresh air system according to the gear when the fan is started;
acquiring the temperature of the cooling water;
calculating the spraying frequency of the cooling water spraying device according to the cooling load and the temperature of the cooling water;
controlling the cooling water spraying device according to the spraying frequency.
2. The control method according to claim 1, wherein the set gear is a lowest gear of the fan.
3. The control method according to claim 1, characterized by further comprising:
if so, controlling the cooling water spraying device to stop spraying and not starting the fan if the humidity is smaller than the humidity threshold value.
4. The control method according to claim 1, wherein the determining the gear at which the fan is turned on according to the concentration of the carbon dioxide comprises:
determining a concentration grade or a concentration interval corresponding to the concentration of the carbon dioxide according to the concentration of the carbon dioxide;
and determining the gear when the fan is started according to the concentration grade or the concentration interval.
5. The control method according to claim 4, wherein the determining the gear when the fan is turned on according to the concentration level or the concentration interval comprises:
the higher the concentration of the carbon dioxide corresponding to the concentration grade or the concentration interval is, the larger the gear when the fan is started is.
6. The control method according to claim 1, wherein the obtaining of the cooling load required by the fresh air cooling of the fresh air system according to the gear when the fan is turned on comprises:
acquiring an outdoor environment temperature and an indoor environment temperature;
and calculating to obtain the cold load according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started.
7. The utility model provides a controlling means of new trend system which characterized in that, new trend system includes: the cooling water spraying device is arranged in a ventilating pipeline between an outdoor air inlet device and an indoor air outlet device, and the humidity sensor is arranged at a maximum humidity measuring point in the ventilating pipeline, the cooling water spraying device is used for atomizing input cooling water, the humidity sensor is used for detecting the humidity in the ventilating pipeline, the cooling water is condensed water generated in the refrigerating process of the air conditioner, and the control device comprises:
the first acquisition module is used for periodically acquiring the concentration of indoor carbon dioxide;
the judging module is used for judging whether the concentration of the carbon dioxide is smaller than a preset concentration threshold value or not;
the starting setting module is used for controlling the cooling water spraying device to stop spraying and starting the fan if the humidity is equal to or greater than a preset humidity threshold value, and setting a gear when the fan is started as a set gear to prevent the ventilating duct from mildewing;
the starting determining module is used for starting the fan if the carbon dioxide is not in the preset range, and determining the gear when the fan is started according to the concentration of the carbon dioxide;
the second acquisition module is used for acquiring the cold load required by the fresh air cooling of the fresh air system according to the gear when the fan is started;
the third acquisition module is used for acquiring the temperature of the cooling water;
the calculation module is used for calculating the spraying frequency of the cooling water spraying device according to the cold load and the temperature of the cooling water;
and the control module is used for controlling the cooling water spraying device according to the spraying frequency.
8. The control device according to claim 7, wherein the set gear is a lowest gear of the fan.
9. The control device of claim 7, wherein the activation setting module is further configured to:
if so, controlling the cooling water spraying device to stop spraying and not starting the fan if the humidity is smaller than the humidity threshold value.
10. The control device according to claim 7, wherein the activation determination module is specifically configured to:
determining a concentration grade or a concentration interval corresponding to the concentration of the carbon dioxide according to the concentration of the carbon dioxide;
and determining the gear when the fan is started according to the concentration grade or the concentration interval.
11. The control device according to claim 10, wherein the activation determination module is specifically configured to:
the higher the concentration of the carbon dioxide corresponding to the concentration grade or the concentration interval is, the larger the gear when the fan is started is.
12. The control device according to claim 7, wherein the second obtaining module is specifically configured to:
acquiring an outdoor environment temperature and an indoor environment temperature;
and calculating to obtain the cold load according to the outdoor environment temperature, the indoor environment temperature and the gear when the fan is started.
13. A fresh air system, comprising: a control device for a fresh air system as claimed in any of claims 7 to 12.
14. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and operable on the processor, the processor implementing the control method of the fresh air system as claimed in any one of claims 1 to 6 when executing the program.
15. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements a control method for a fresh air system according to any of claims 1 to 6.
CN201811501292.1A 2018-12-10 2018-12-10 Control method and device of fresh air system and fresh air system Active CN109612010B (en)

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