CN115013912B - Control method and device of fresh air system, storage medium and fresh air system - Google Patents

Control method and device of fresh air system, storage medium and fresh air system Download PDF

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Publication number
CN115013912B
CN115013912B CN202210758582.4A CN202210758582A CN115013912B CN 115013912 B CN115013912 B CN 115013912B CN 202210758582 A CN202210758582 A CN 202210758582A CN 115013912 B CN115013912 B CN 115013912B
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Prior art keywords
fresh air
air system
started
heat exchange
unit
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CN115013912A (en
Inventor
武如康
王念
蔡晓文
向丽娟
侯强
鲍依婷
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • 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
    • F24F11/46—Improving electric energy efficiency or saving
    • 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
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • 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
    • 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)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a control method and device of a fresh air system, a storage medium and the fresh air system, wherein the control method comprises the following steps: after the fresh air system is started, determining whether a refrigerating or heating function of the fresh air system needs to be started; if the refrigeration or heating function of the fresh air system is determined to be started, controlling the heat exchange equipment of the outdoor unit of the fresh air system to be started, controlling the fan of the fresh air system to be started, and controlling the switch of a corresponding air valve according to a user control command; if the cooling or heating function of the fresh air system is determined not to be started, the fan of the fresh air system is directly controlled to be started, and the corresponding air valve is controlled to be opened and closed according to a user control command. The scheme provided by the invention can reduce the system power consumption and improve the temperature and humidity regulation rate.

Description

Control method and device of fresh air system, storage medium and fresh air system
Technical Field
The present invention relates to the field of control, and in particular, to a method and apparatus for controlling a fresh air system, a storage medium, and a fresh air system.
Background
The fresh air system is an air conduction device taking fresh air exchange as an idea, and the purpose of breathing fresh air without opening doors and windows is achieved by pumping outdoor fresh air into a room. Most of the current fresh air systems in the market have refrigeration and heating functions. The passive house, namely a passive low-energy building, is a building house which is expected to minimize heat loss caused by the transfer heat loss and air permeation of a peripheral structure of the building through a building technology, and has excellent heat preservation, heat insulation and tightness.
However, the related art has no modification to the main source "cooling/heating unit" of the power consumption of the fresh air system, and the effect is limited in most cases. The control method based on real-time signal feedback is practical in the traditional house, but when the control method is used for a highly controllable energy-saving building such as a passive house, the traditional control method can have energy waste because the temperature, the humidity and the like are linearly changed and a certain time is needed.
Disclosure of Invention
The invention aims to overcome the defects of the related art, and provides a control method and device of a fresh air system, a storage medium and the fresh air system, so as to solve the problem that the control method of real-time signal feedback in the related art is used for wasting energy in a passive room.
In one aspect, the present invention provides a control method for a fresh air system, where the fresh air system has a heat exchange function, and the control method includes: after the fresh air system is started, determining whether a refrigerating or heating function of the fresh air system needs to be started; if the refrigeration or heating function of the fresh air system is determined to be started, controlling the heat exchange equipment of the outdoor unit of the fresh air system to be started, controlling the fan of the fresh air system to be started, and controlling the corresponding air valve to be opened according to a user command; if the cooling or heating function of the fresh air system is determined not to be started, directly controlling the opening of a fan of the fresh air system, and controlling the opening and closing of each air valve according to a user control command.
Optionally, determining whether the cooling or heating function of the fresh air system needs to be turned on includes: determining whether a refrigerating or heating function of the fresh air system needs to be started according to a user control command; and/or judging whether the refrigeration or heating function is required to be started according to the difference value between the set temperature and the current indoor environment temperature.
Optionally, controlling the heat exchange device of the outdoor unit of the fresh air system to be turned on includes: determining the duration of refrigeration operation or heating operation of the fresh air system according to the assembly environment parameters and the set parameters of the fresh air system; and controlling the heat exchange equipment of the outdoor unit to operate according to the determined duration of the refrigeration operation or the heating operation.
Optionally, determining the duration of the cooling operation or the heating operation of the fresh air system according to the assembly environmental parameter and the set parameter of the fresh air system includes: calculating the duration of refrigerating operation or heating operation of heat exchange equipment of an outdoor unit of the fresh air system according to a set frequency according to the following formula;
Wherein, T is the duration of the heat exchange equipment operating according to the set frequency, tmp Ring(s) is the indoor environment temperature value, tmp Is provided with is the set temperature value, mult is the time required for changing the preset temperature value, S Total (S) is the total coverage area of the fresh air system unit, and S Real world is the working object area of the fresh air system unit.
In another aspect, the present invention provides a control device for a fresh air system, where the fresh air system has a heat exchange function, and the control device includes: the determining unit is used for determining whether the refrigerating or heating function of the fresh air system needs to be started after the fresh air system is started; the control unit is used for controlling the heat exchange equipment of the outdoor unit of the fresh air system to be started, controlling the fan of the fresh air system to be started and controlling the switch of a corresponding air valve according to a user control command if the determining unit determines that the refrigerating or heating function of the fresh air system needs to be started; if the cooling or heating function of the fresh air system is determined not to be started, the fan of the fresh air system is directly controlled to be started, and the corresponding air valve is controlled to be opened and closed according to a user control command.
Optionally, the determining unit determines whether the cooling or heating function of the fresh air system needs to be started, including: determining whether a refrigerating or heating function of the fresh air system needs to be started according to a user control command; and/or judging whether the refrigeration or heating function is required to be started according to the difference value between the set temperature and the current indoor environment temperature.
Optionally, the control unit controls the heat exchange device of the outdoor unit of the fresh air system to be turned on, including: determining the duration of refrigeration operation or heating operation of the fresh air system according to the assembly environment parameters and the set parameters of the fresh air system; and controlling the heat exchange equipment of the outdoor unit to operate according to the determined duration of the refrigeration operation or the heating operation.
Optionally, the control unit determines the duration of the cooling operation or the heating operation of the fresh air system according to the assembly environmental parameter and the setting parameter of the fresh air system, and includes: calculating the duration of refrigerating operation or heating operation of heat exchange equipment of an outdoor unit of the fresh air system according to a set frequency according to the following formula;
Wherein, T is the duration of the heat exchange equipment operating according to the set frequency, tmp Ring(s) is the indoor environment temperature value, tmp Is provided with is the set temperature value, mult is the time required for changing the preset temperature value, S Total (S) is the total coverage area of the fresh air system unit, and S Real world is the working object area of the fresh air system unit.
In a further aspect the invention provides a storage medium having stored thereon a computer program which when executed by a processor performs the steps of any of the methods described above.
In a further aspect the invention provides a fresh air system comprising a processor, a memory and a computer program stored on the memory and operable on the processor to perform the steps of any of the methods described above when the program is executed by the processor.
The invention further provides a fresh air system, which comprises the control device of any one of the fresh air systems.
According to the technical scheme of the invention, based on the characteristics of the passive room, the refrigerating/heating quantity in the single high-frequency mode is controlled. According to the technical scheme, the power consumption of the system can be reduced, and the temperature and humidity regulation rate can be improved. Through experimental tests, compared with the traditional fresh air system, the system power consumption is reduced by 15%, the temperature and humidity adjusting capability of the system is improved by 30%, and the speed of the temperature and humidity parameters reaching a comfortable curve is improved by 30%.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of a method of an embodiment of a method for controlling a fresh air system according to the present invention;
FIG. 2 shows a schematic diagram of a room layout of a passive room in accordance with an embodiment of the invention;
FIG. 3a shows a schematic structural view of an air duct;
FIG. 3b shows a schematic view of the outlet damper when closed;
FIG. 3c shows a schematic diagram of the outlet damper when open;
FIG. 4 is a flowchart of one embodiment of the steps for controlling the opening of the heat exchange device of the outdoor unit of the fresh air system;
FIG. 5 shows a schematic diagram implemented by a control terminal;
FIG. 6 is a schematic diagram of a method of controlling a fresh air system according to an embodiment of the present invention;
fig. 7 is a block diagram of a control device of a fresh air system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Passive rooms were developed on the basis of the "low energy building" proposed in germany in the 20 th century, and the ultimate goal was to maintain indoor temperature without the need for temperature regulation devices. Of course, the requirement of the final goal is not met by the prior art, so the current passive rooms are pursued to reduce the exhaustion possibility of the room temperature adjusting device and ensure the comfort of the temperature, so the heat exchange between the room inside and the room outside is reduced as much as possible.
In order to achieve the above-mentioned goal, the passive house building is generally designed as the building with high tightness and high heat insulation, and the building process uses the building methods of thickening the wall, adding heat insulation layer on the wall, and multiple layers of glass, etc. Because of the high tightness, high thermal insulation of the passive room, the power consumption of the temperature regulating device may be low in the passive side. The power consumption of the temperature regulating device of the germany passive house is only 8% of that of a normal building through data provided by the germany passive house research institute. It shows that 8% of the refrigeration/heat of a normal room can meet the requirement of a passive house building with the same area.
The invention provides a control method of a fresh air system. The method is mainly used for a fresh air system of a passive room. The fresh air system can be a fresh air system with heat exchange (refrigeration and/or heating) function.
Fig. 2 shows a schematic diagram of a room layout of a passive room according to an embodiment of the invention.
As shown in fig. 2, the passive room fresh air system includes an outdoor unit 100, an indoor unit 200, and an air duct 300; the room areas are labeled in the figure (for example only). The outdoor unit 100 is used for changing the temperature of the refrigerant and transmitting the refrigerant; the indoor unit 200 is used for filtering, heating or refrigerating air and pumping air into the air duct; the duct 300 is used for transporting air. The control end is responsible for controlling the running state of the whole unit.
The outdoor unit comprises heat exchange equipment, and the heat exchange equipment specifically comprises a compressor, an outdoor heat exchanger and a throttling device; the indoor unit may specifically include an indoor heat exchanger and a blower. When the refrigerating function is started, the fan blows air through the evaporator, and the air exchanges heat with the refrigerant in the refrigerant pipe of the evaporator to become cold air which is then blown into a room; when the heating function is started, the fan blows air through the evaporator, and the air exchanges heat with the refrigerant in the refrigerant pipe of the evaporator to be changed into hot air, and then the hot air is blown into a room.
Fig. 3a shows a schematic structural view of the wind tunnel. Fig. 3b shows a schematic view of the outlet damper when closed. Fig. 3c shows a schematic view of the outlet damper when open. As shown in fig. 3a, 3b, and 3c, the air duct 300 includes an air outlet 310 and an air passage 320. The air outlet is provided with an air valve 311. The air valve is controlled by the control end and can be controlled to be opened or closed. 312 are duct walls.
Fig. 1 is a schematic diagram of a method of an embodiment of a control method of a fresh air system according to the present invention.
As shown in fig. 1, the control method at least includes step S110, step S120, and step S130 according to an embodiment of the present invention.
Step S110, when the fresh air system is started, determining whether the cooling or heating function of the fresh air system needs to be started.
In one embodiment, whether the cooling or heating function of the fresh air system needs to be started is determined according to a user control command. For example, after the fresh air system is powered on, a user inputs a control command, where the control command includes: at least one of an operation mode command, a target temperature value command, and each damper switch command. And determining whether the refrigerating or heating function of the fresh air system needs to be started according to the operation mode command.
In another embodiment, whether the cooling or heating function needs to be started is determined according to the difference between the set temperature and the current indoor environment temperature. Specifically, if the difference between the set temperature and the current indoor environment temperature is greater than a preset threshold, it is determined that the refrigeration function needs to be started, and if the difference between the set temperature and the current indoor environment temperature is less than or equal to the preset threshold, it is determined that the refrigeration function does not need to be started. If the difference value between the current indoor environment temperature and the set temperature is larger than a preset threshold value, determining that the heating function needs to be started, and if the difference value between the current indoor environment temperature and the set temperature is smaller than or equal to the preset threshold value, determining that the heating function does not need to be started. Wherein the preset threshold value is greater than or equal to zero. Whether to start heating or start cooling is further determined according to an outdoor environment temperature, for example, when the outdoor environment temperature is greater than a first preset temperature value, whether to start the cooling function is determined, and when the outdoor environment temperature is less than a second preset temperature value, whether to start the heating function is determined.
Step S120, if it is determined that the cooling or heating function of the fresh air system needs to be started, controlling the heat exchange device of the outdoor unit of the fresh air system to be started, controlling the fan of the fresh air system to be started, and controlling the switch of the corresponding air valve according to the user control command.
In one embodiment, fig. 4 is a flowchart showing one embodiment of the steps of controlling the heat exchange device of the outdoor unit of the fresh air system to be turned on. As shown in fig. 4, controlling the heat exchange device of the outdoor unit of the fresh air system to be turned on may specifically include step S121 and step S122.
Step S121, determining the duration of the cooling operation or the heating operation of the fresh air system according to the assembly environment parameters and the setting parameters of the fresh air system.
In one embodiment, the set parameter includes a set temperature value (i.e., a target temperature value); the assembly environment parameters comprise the total coverage area of the fresh air system unit and the working object area of the fresh air system unit. Wherein, the total coverage area of the unit is the area which can be cooled or heated or blown when all the air valves are opened; the unit work object area refers to an actual work area, for example, the dampers of some rooms may be closed, i.e., not operated on these rooms, and the unit work object area is the total area where the dampers are opened. The actual working area can be changed by switching on and off certain air valves according to the requirements of users; the total unit coverage area is the determined maximum coverage area when the unit is installed, namely the room area covered by the fully opened air valve. When the fresh air system is installed, relevant installation environment parameters can be input according to actual conditions, for example, the relevant installation environment parameters are input into a control system of the fresh air system, for example, a controller or a main control board storage unit.
In one embodiment, the duration of the cooling operation or the heating operation according to the set frequency is calculated according to the following formula;
Wherein, T is the duration of refrigerating operation or heating operation of heat exchange equipment (specifically, a compressor of the heat exchange equipment) of the outdoor unit of the fresh air system according to a set frequency, and the unit is: min; the set frequency may specifically be a maximum operating frequency of the heat exchange device (i.e. a maximum operating frequency of a compressor of the heat exchange device), tmp Ring(s) is an indoor environmental temperature value, and the unit is: the temperature is lower than the temperature; tmp Is provided with is a set temperature value in units of: the temperature is lower than the temperature; mult is the time required to change a preset temperature value (e.g., one degree), in units of: min; a is a preset compensation constant, and S Total (S) is the total coverage area of the fresh air system unit, and the unit is as follows: square meters; s Real world is the area of a working object of the fresh air system unit, and the unit is: and (5) a square meter.
Wherein, mult a [1- (S Real world /S Total (S) ) ] is the compensation value, and the temperature diffusion between different rooms in the passive room is considered; the influence of the diffusion of the temperature in the passive room to the temperature outside the passive room is extremely small and negligible due to the high heat preservation and high airtight property of the passive room. This part is aimed at compensating values for the fact that in passive building, when the unit only works part of the room, the temperature of the working room will spread to the non-working room.
The formula is simplified in that the thermal dispersion loss is mapped to mult (the time required for a change in one degree), that is, the loss caused by thermal dispersion is compensated by increasing the value of mult.
The above variables are:
I.e. mult is too much The multiple is used as the compensation value. Where the compensation constant a (an example value is 0.04) is a constant that is tested to be suitable for most situations based on normal distribution, and needs to be modified in certain specific environments (e.g., extremely cold, extremely hot, extremely wet, etc.). Taking the building parameters and the geographic parameters as input, and carrying out experiments to obtain the specific value of the compensation constant a by changing the input parameters.
The formula for the time required for changing the unit temperature per unit area: equation |tmp Ring(s) -tmpIs provided with |*mult*(S Real world /S Total (S) ), where |tmp Ring(s) -tmpIs provided with | is the temperature required change value, multiplied by mult (the time required for a change once), to obtain the total time required to reach the set point; part (S Real world /S Total (S) ) is to address the case where the unit sometimes turns on only a part of the room. For example, if all rooms are open, then (S Real world /S Total (S) )＝1,|tmp Ring(s) -tmpIs provided with |*mult*(S Real world /S Total (S) ) the product is also equivalent to |tmp Ring(s) -tmpIs provided with |mult; if there are three 50 square meter rooms, only two are open, then the |tmp Ring(s) -tmpIs provided with |*mult*(S Real world /S Total (S) ) product is equal to |tmp Ring(s) -tmpIs provided with |mutt (2/3).
The example fresh air system unit power is 3000W, in a laboratory simulation under the passive room environment shown in fig. 2:
① The indoor environment temperature is 15 ℃, the set temperature is 26 ℃, all air valves are fully opened, and full-house heating is performed. And the single high-frequency operation is carried out for 18.1 minutes, at the moment, the indoor environment temperature reaches 24.5 ℃, the unit heating is closed, and the temperature transmission is waited. After two minutes, the indoor ambient temperature reaches the set temperature value and thereafter the temperature is maintained.
② The indoor environment temperature is 15 ℃, the set temperature is 26 ℃, the living room air valve is opened, and the rest air valves are closed, so that only living room heating is performed. And 7.7 minutes of operation, wherein the indoor environment temperature reaches 25.1 ℃, the unit heating is closed, and the temperature transmission is waited. After one minute, the living room reaches the set temperature, the bedroom reaches 15.6 ℃, the recumbent 1 reaches 15.9 ℃, the recumbent 2 reaches 15.4 ℃, the kitchen reaches 15.2 ℃, and the bathroom is basically unchanged.
③ And the indoor environment temperature is 35 ℃, the set temperature is 26 ℃, all air valves are fully opened, and the whole house refrigeration is carried out. And the single high-frequency operation is carried out for 14.5 minutes, at the moment, the indoor environment temperature reaches 27.5 ℃, the unit refrigeration is closed, and the temperature transmission is waited. After two minutes, the indoor ambient temperature reached the set temperature value.
④ The indoor environment temperature is 35 ℃, the set temperature is 26 ℃, the living room air valve is opened, and the rest air valves are closed, so that only living room heating is performed. And the high-frequency operation is carried out for 6.0 minutes, at the moment, the indoor environment temperature reaches 26.6 ℃, the unit refrigeration is closed, and the temperature transmission is waited. After half a minute, the living room reaches the set temperature, the bedroom reaches 26.3 ℃, the recumbent 1 reaches 26.2 ℃, the recumbent 2 reaches 26.4 ℃, the kitchen reaches 26.9 ℃, and the bathroom is basically unchanged.
The experiment is verified for many times, the experimental results meet the formula, and according to the conditions, energy waste does exist according to the real-time feedback temperature value as the basis of machine unit shutdown.
Step S122, controlling the heat exchange device of the outdoor unit to operate according to the determined duration of the cooling operation or the heating operation.
Specifically, the heat exchange equipment of the outdoor unit is controlled to operate according to the determined duration of the refrigerating operation or the heating operation, the fan of the fresh air system is controlled to be started, and the corresponding air valve is controlled to be opened according to a user command.
For example, after the determined duration T of the cooling operation or the heating operation, controlling the refrigeration (heating) equipment of the external machine to start up so as to change the temperature of the refrigerant; after waiting for a certain time (30S for example), the outer machine pumps the refrigerant into the refrigerant pipe of the inner machine; the inner machine starts a fan, fresh air is blown through the refrigerant pipe, and the fresh air is blown into the indoor air channel after the temperature is changed; fresh air reaches the air outlet along the air channel and finally enters the room through the opened air valve. The process continues until time T ends.
Step S130, if it is determined that the cooling or heating function of the fresh air system does not need to be started, directly controlling the opening of a fan of the fresh air system, and controlling the opening and closing of a corresponding air valve according to a user control command.
Specifically, if the refrigerating or heating function does not need to be started, the fan of the internal machine is directly controlled to start, and the air valve is controlled to switch according to a user control command. For example, after the fresh air system is powered on, a user inputs a control command, where the control command includes: at least one of an operation mode command, a target temperature value command, and each damper switch command. And according to the air valve opening and closing command, the air valve which is opened or closed by the user can be determined, and then the air valve is controlled to be opened or closed according to the user control command. Fresh air is pumped into the indoor air channel by the internal machine and finally enters the corresponding room through the air outlet of which the air valve is in an open state.
As shown in fig. 5, the above steps of the present invention may be implemented by a control terminal including a microprocessor, a storage medium, an input device, and an output device. The input device is not limited to an application APP, a website, a remote controller, and the like.
In order to clearly illustrate the technical scheme of the invention, the implementation flow of the control method of the fresh air system provided by the invention is described in the following by a specific embodiment.
Fig. 6 is a schematic diagram of a method of a specific embodiment of a control method of a fresh air system according to the present invention. As shown in fig. 6, after the fresh air system is installed, relevant environmental parameters are input into the system through the input equipment of the control end according to the installation environment and stored. ① The method comprises the steps of powering on for the first time, self-checking and initializing each module, wherein the self-checking and initializing comprise air valve resetting, fan test rotation and sensor fault detection; ② The user inputs control commands through the input equipment of the control end, and the commands mainly comprise: a machine set on-off command, a machine set running mode command, a target temperature value command and a switching command of air valves of all rooms. ③ After receiving the user control command, the control end judges whether the user starts the refrigerating or heating function or not, or judges whether the refrigerating or heating function needs to be started according to the difference value between the set temperature and the current temperature, and calculates the time T for starting the refrigerating or heating function. ④ If the refrigerating or heating function does not need to be started, the fan of the internal machine is directly controlled to start, and the air valve is controlled to be switched on and off according to a user command. Fresh air is pumped into the indoor air channel by the internal machine and finally enters the room through the air outlet of which the air valve is in an open state. ⑤ If the refrigeration or heating function is required to be started, the refrigeration (heating) equipment of the external machine is controlled to start up, so that the temperature of the refrigerant is changed; after waiting for 30S, the outer machine pumps the refrigerant into a refrigerant pipe of the inner machine; the inner machine starts a fan, fresh air is blown through the refrigerant pipe, and the fresh air is blown into the indoor air channel after the temperature is changed; fresh air reaches the air outlet along the air channel and finally enters the room through the opened air valve. The process continues until the end of time T, after which the second step state is returned. ⑥ During the whole running period of the unit, a user can shut down the command or change the set value at any time through the input equipment of the control end.
The invention provides a control device of a fresh air system. The device can be used for a fresh air system for a passive room. The fresh air system can be a fresh air system with heat exchange (refrigeration and/or heating) function.
As shown in fig. 2, the passive room fresh air system includes an outdoor unit 100, an indoor unit 200, and an air duct 300; the room areas are labeled in the figure (for example only). The outdoor unit 100 is used for changing the temperature of the refrigerant and transmitting the refrigerant; the indoor unit 200 is used for filtering, heating or refrigerating air and pumping air into the air duct; the duct 300 is used for transporting air. The control end is responsible for controlling the running state of the whole unit.
Fig. 3a shows a schematic structural view of the wind tunnel. Fig. 3b shows a schematic view of the outlet damper when closed. Fig. 3c shows a schematic view of the outlet damper when open. As shown in fig. 3a, 3b, and 3c, the air duct 300 includes an air outlet 310 and an air passage 320. The air outlet is provided with an air valve 311. The air valve can be controlled by a control end and can be controlled to be opened or closed. 312 are duct walls.
Fig. 7 is a block diagram of a control device of a fresh air system according to an embodiment of the present invention. As shown in fig. 7, the control device 100 includes a determination unit 110 and a control unit 120.
And the determining unit 110 is configured to determine whether a cooling or heating function of the fresh air system needs to be turned on after the fresh air system is turned on.
In one embodiment, whether the cooling or heating function of the fresh air system needs to be started is determined according to a user control command. For example, after the fresh air system is powered on, a user inputs a control command, where the control command includes: at least one of an operation mode command, a target temperature value command, and each damper switch command. And determining whether the refrigerating or heating function of the fresh air system needs to be started according to the operation mode command.
In another embodiment, whether the cooling or heating function needs to be started is determined according to the difference between the set temperature and the current indoor environment temperature. Specifically, if the difference between the set temperature and the current indoor environment temperature is greater than a preset threshold, it is determined that the refrigeration function needs to be started, and if the difference between the set temperature and the current indoor environment temperature is less than or equal to the preset threshold, it is determined that the refrigeration function does not need to be started. If the difference value between the current indoor environment temperature and the set temperature is larger than a preset threshold value, determining that the heating function needs to be started, and if the difference value between the current indoor environment temperature and the set temperature is smaller than or equal to the preset threshold value, determining that the heating function does not need to be started. Wherein the preset threshold value is greater than or equal to zero. Whether to start heating or start cooling is further determined according to an outdoor environment temperature, for example, when the outdoor environment temperature is greater than a first preset temperature value, whether to start the cooling function is determined, and when the outdoor environment temperature is less than a second preset temperature value, whether to start the heating function is determined.
The control unit 120 is configured to control, if the determining unit 110 determines that the cooling or heating function of the fresh air system needs to be turned on, the heat exchange device of the outdoor unit of the fresh air system to be turned on, control the fan of the fresh air system to be turned on, and control the corresponding air valve to be turned on or off according to a user control command; if the determining unit 110 determines that the cooling or heating function of the fresh air system does not need to be started, the fan of the fresh air system is directly controlled to be started, and the corresponding air valve is controlled to be opened or closed according to a user control command.
In one embodiment, fig. 4 is a flowchart of one embodiment of the step of controlling the heat exchange device of the outdoor unit of the fresh air system to be turned on by the control unit. As shown in fig. 4, the control unit controlling the heat exchange device of the outdoor unit of the fresh air system to be turned on may specifically include step S121 and step S122.
Step S121, determining the duration of the cooling operation or the heating operation of the fresh air system according to the assembly environment parameters and the setting parameters of the fresh air system.
In one embodiment, the set parameter includes a set temperature value (i.e., a target temperature value); the assembly environment parameters comprise the total coverage area of the fresh air system unit and the working object area of the fresh air system unit. Wherein, the total coverage area of the unit is the area which can be cooled or heated or blown when all the air valves are opened; the unit work object area refers to an actual work area, for example, the dampers of some rooms may be closed, i.e., not operated on these rooms, and the unit work object area is the total area where the dampers are opened. The actual working area can be changed by switching on and off certain air valves according to the requirements of users; the total unit coverage area is the determined maximum coverage area when the unit is installed, namely the room area covered by the fully opened air valve. When the fresh air system is installed, relevant installation environment parameters can be input according to actual conditions, for example, the relevant installation environment parameters are input into a control system of the fresh air system, for example, a controller or a main control board storage unit.
In one embodiment, the duration of the cooling operation or the heating operation according to the set frequency is calculated according to the following formula;
Wherein, T is the duration that the heat exchange equipment (specifically, the compressor of the heat exchange equipment) of the outdoor unit of the fresh air system operates according to the set frequency, and the unit is: min; the set frequency may specifically be a maximum operating frequency of the heat exchange device (i.e. a maximum operating frequency of a compressor of the heat exchange device), tmp Ring(s) is an indoor environmental temperature value, and the unit is: the temperature is lower than the temperature; tmp Is provided with is a set temperature value in units of: the temperature is lower than the temperature; mult is the time required to change a preset temperature value (e.g., one degree), in units of: min; a is a preset compensation constant, and S Total (S) is the total coverage area of the fresh air system unit, and the unit is as follows: square meters; s Real world is the area of a working object of the fresh air system unit, and the unit is: and (5) a square meter.
Wherein, mult a [1- (S Real world /S Total (S) ) ] is the compensation value, and the temperature diffusion between different rooms in the passive room is considered; the influence of the diffusion of the temperature in the passive room to the temperature outside the passive room is extremely small and negligible due to the high heat preservation and high airtight property of the passive room. This part is aimed at compensating values for the fact that in passive building, when the unit only works part of the room, the temperature of the working room will spread to the non-working room.
The formula is simplified in that the thermal dispersion loss is mapped to mult (the time required for a change in one degree), that is, the loss caused by thermal dispersion is compensated by increasing the value of mult.
The above variables are:
I.e. mult is too much The multiple is used as the compensation value. Where the compensation constant a (an example value is 0.04) is a constant that is tested to be suitable for most situations based on normal distribution, and needs to be modified in certain specific environments (e.g., extremely cold, extremely hot, extremely wet, etc.). Taking the building parameters and the geographic parameters as input, and carrying out experiments to obtain the specific value of the compensation constant a by changing the input parameters.
The formula for the time required for changing the unit temperature per unit area: equation |tmp Ring(s) -tmpIs provided with |*mult*(S Real world /S Total (S) ), where |tmp ring-tmp set| is the temperature required change value, multiplied by mult (the time required for a change once), gives the total time required to reach the set value; part (S Real world /S Total (S) ) is to address the case where the unit sometimes turns on only a part of the room. For example, if all rooms are open, then (S Real world /S Total (S) )＝1,|tmp Ring(s) -tmpIs provided with |*mult*(S Real world /S Total (S) ) the product is also equivalent to |tmp Ring(s) -tmpIs provided with |mult; if there are three 50 square meter rooms, only two are open, then the |tmp Ring(s) -tmpIs provided with |*mult*(S Real world /S Total (S) ) product is equal to |tmp Ring(s) -tmpIs provided with |mutt (2/3).
Step S122, controlling the heat exchange device of the outdoor unit to operate according to the determined duration of the cooling operation or the heating operation.
Specifically, the heat exchange equipment of the outdoor unit is controlled to operate according to the determined duration of the refrigerating operation or the heating operation, the fan of the fresh air system is controlled to be started, and the corresponding air valve is controlled to be opened according to a user command.
For example, after the determined duration T of the cooling operation or the heating operation, controlling the refrigeration (heating) equipment of the external machine to start up so as to change the temperature of the refrigerant; after waiting for a certain time (30S for example), the outer machine pumps the refrigerant into the refrigerant pipe of the inner machine; the inner machine starts a fan, fresh air is blown through the refrigerant pipe, and the fresh air is blown into the indoor air channel after the temperature is changed; fresh air reaches the air outlet along the air channel and finally enters the room through the opened air valve. The process continues until time T ends.
If the determining unit 110 determines that the cooling or heating function of the fresh air system does not need to be started, the control unit 120 directly controls the fan of the fresh air system to be started, and controls the switch of the corresponding air valve according to the user control command.
Specifically, if the refrigerating or heating function does not need to be started, the fan of the internal machine is directly controlled to start, and the air valve is controlled to switch according to a user control command. For example, after the fresh air system is powered on, a user inputs a control command, where the control command includes: at least one of an operation mode command, a target temperature value command, and each damper switch command. And according to the air valve opening and closing command, the air valve which is opened or closed by the user can be determined, and then the air valve is controlled to be opened or closed according to the user control command. Fresh air is pumped into the indoor air channel by the internal machine and finally enters the corresponding room through the air outlet of which the air valve is in an open state.
The invention also provides a storage medium corresponding to the control method of the fresh air system, and a computer program is stored on the storage medium, and the program realizes the steps of any one of the methods when being executed by a processor.
The invention also provides a fresh air system corresponding to the control method of the fresh air system, which comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides a fresh air system corresponding to the control device of the fresh air system, which comprises the control device of any one of the fresh air systems.
Accordingly, the scheme provided by the invention is based on the characteristics of the passive room, and the refrigerating/heating quantity in the single high-frequency mode is controlled. According to the technical scheme, the power consumption of the system can be reduced, and the temperature and humidity regulation rate can be improved. Through experimental tests, compared with the traditional fresh air system, the system power consumption is reduced by 15%, the temperature and humidity adjusting capability of the system is improved by 30%, and the speed of the temperature and humidity parameters reaching a comfortable curve is improved by 30%.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software that is executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate components may or may not be physically separate, and components as control devices may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the related art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (8)

1. The control method of the fresh air system is characterized in that the fresh air system has a heat exchange function, and the heat exchange function is a refrigerating or heating function; the control method comprises the following steps:
After the fresh air system is started, determining whether a refrigerating or heating function of the fresh air system needs to be started;
if the refrigeration or heating function of the fresh air system is determined to be started, controlling the heat exchange equipment of the outdoor unit of the fresh air system to be started, controlling the fan of the fresh air system to be started, and controlling the switch of a corresponding air valve according to a user control command;
if the cooling or heating function of the fresh air system is determined not to be started, directly controlling a fan of the fresh air system to be started, and controlling the switch of a corresponding air valve according to a user control command;
the heat exchange equipment of the outdoor unit of the fresh air system is controlled to be started, and the method comprises the following steps:
Determining the duration of refrigeration operation or heating operation of the fresh air system according to the assembly environment parameters and the set parameters of the fresh air system;
controlling heat exchange equipment of the outdoor unit to operate according to the determined duration of the refrigeration operation or the heating operation;
According to the assembly environment parameters and the set parameters of the fresh air system, determining the duration of the refrigerating operation or the heating operation of the fresh air system comprises the following steps: calculating the duration of refrigerating operation or heating operation of heat exchange equipment of an outdoor unit of the fresh air system according to a set frequency according to the following formula;
Wherein, T is the duration of the cooling operation or the heating operation of the heat exchange device according to the set frequency, tmp Ring(s) is the indoor environment temperature value, tmp Is provided with is the set temperature value, mult is the time required for changing the preset temperature value, a is the preset compensation constant, S Total (S) is the total coverage area of the fresh air system unit, and S Real world is the working object area of the fresh air system unit.
2. The control method of claim 1, wherein determining whether a cooling or heating function of the fresh air system needs to be turned on comprises:
determining whether a refrigerating or heating function of the fresh air system needs to be started according to a user control command;
And/or the number of the groups of groups,
Judging whether the refrigeration or heating function needs to be started according to the difference value between the set temperature and the current indoor environment temperature.
3. The control method according to claim 1 or 2, wherein determining a duration of a cooling operation or a heating operation of the fresh air system according to the assembly environment parameter and the setting parameter of the fresh air system includes:
Calculating the duration of refrigerating operation or heating operation of heat exchange equipment of an outdoor unit of the fresh air system according to a set frequency according to the following formula;
Wherein, T is the duration of the cooling operation or the heating operation of the heat exchange device according to the set frequency, tmp Ring(s) is the indoor environment temperature value, tmp Is provided with is the set temperature value, mult is the time required for changing the preset temperature value, S Total (S) is the total coverage area of the fresh air system unit, and S Real world is the working object area of the fresh air system unit.
4. The control device of the fresh air system is characterized in that the fresh air system has a heat exchange function, and the heat exchange function is a refrigerating or heating function; the control device includes:
The determining unit is used for determining whether the refrigerating or heating function of the fresh air system needs to be started after the fresh air system is started;
The control unit is used for controlling the heat exchange equipment of the outdoor unit of the fresh air system to be started, controlling the fan of the fresh air system to be started and controlling the switch of a corresponding air valve according to a user control command if the determining unit determines that the refrigerating or heating function of the fresh air system needs to be started; if the cooling or heating function of the fresh air system is determined not to be started, directly controlling a fan of the fresh air system to be started, and controlling the switch of a corresponding air valve according to a user control command;
the control unit controls the heat exchange equipment of the outdoor unit of the fresh air system to be started, and the control unit comprises:
Determining the duration of refrigeration operation or heating operation of the fresh air system according to the assembly environment parameters and the set parameters of the fresh air system;
controlling heat exchange equipment of the outdoor unit to operate according to the determined duration of the refrigeration operation or the heating operation;
the control unit determines the duration of the refrigerating operation or the heating operation of the fresh air system according to the assembly environment parameters and the set parameters of the fresh air system, and comprises the following steps: calculating the duration of refrigerating operation or heating operation of heat exchange equipment of an outdoor unit of the fresh air system according to a set frequency according to the following formula;
Wherein, T is the duration of the cooling operation or the heating operation of the heat exchange device according to the set frequency, tmp Ring(s) is the indoor environment temperature value, tmp Is provided with is the set temperature value, mult is the time required for changing the preset temperature value, a is the preset compensation constant, S Total (S) is the total coverage area of the fresh air system unit, and S Real world is the working object area of the fresh air system unit.
5. The control device according to claim 4, wherein the determining unit determining whether the cooling or heating function of the fresh air system needs to be turned on includes:
determining whether a refrigerating or heating function of the fresh air system needs to be started according to a user control command;
And/or the number of the groups of groups,
Judging whether the refrigeration or heating function needs to be started according to the difference value between the set temperature and the current indoor environment temperature.
6. The control device according to claim 4 or 5, wherein the control unit determines a duration of a cooling operation or a heating operation of the fresh air system according to an assembly environment parameter and a set parameter of the fresh air system, comprising:
Calculating the duration of refrigerating operation or heating operation of heat exchange equipment of an outdoor unit of the fresh air system according to a set frequency according to the following formula;
Wherein, T is the duration of the cooling operation or the heating operation of the heat exchange device according to the set frequency, tmp Ring(s) is the indoor environment temperature value, tmp Is provided with is the set temperature value, mult is the time required for changing the preset temperature value, S Total (S) is the total coverage area of the fresh air system unit, and S Real world is the working object area of the fresh air system unit.
7. A storage medium having stored thereon a computer program which when executed by a processor performs the steps of the method of any of claims 1-3.
8. A fresh air system comprising a processor, a memory and a computer program stored on the memory and operable on the processor to perform the steps of the method of any one of claims 1 to 3 when executed by the processor, or the fresh air system comprising the control device of any one of claims 4 to 6.
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