CN113531815A - Fresh air equipment control method, fresh air equipment and readable storage medium - Google Patents
Fresh air equipment control method, fresh air equipment and readable storage medium Download PDFInfo
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- 230000000903 blocking effect Effects 0.000 claims description 40
- 238000009423 ventilation Methods 0.000 claims description 31
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- 238000004458 analytical method Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
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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
- F24F11/62—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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/70—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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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- 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
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- 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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Abstract
The invention discloses a control method of fresh air equipment, which comprises the following steps: under the condition that the fresh air equipment supplies air according to the set air volume required by the set positive pressure state, if the on-off state of the barrier piece changes, determining the variation of air leakage in the action space of the fresh air equipment corresponding to the change of the on-off state; the barrier piece is arranged at a vent between the fresh air equipment action space and the external environment; determining a first target fresh air volume according to the variable quantity and the set air volume; and controlling the air supply of the fresh air equipment according to the first target fresh air quantity. The invention also discloses a fresh air device and a readable storage medium. The invention aims to adapt to the change of air leakage caused by the opening and closing conditions of doors and windows and the like in an indoor positive pressure state, accurately evaluate the fresh air quantity required by the indoor positive pressure state, effectively maintain the positive pressure state in an indoor environment and ensure the air quality of the indoor environment.
Description
Technical Field
The invention relates to the technical field of fresh air equipment, in particular to a fresh air equipment control method, fresh air equipment and a readable storage medium.
Background
With the rapid development of economy and industry, air pollution in most areas is becoming serious, and how to purify the air quality of indoor space where people move for a long time becomes an important subject for ensuring the health of people. Since the indoor environment is not completely closed, the gap is used as a channel for the gas interaction between the indoor environment and the outdoor environment. In order to ensure that indoor air cannot be polluted by outdoor pollutants, a fresh air system is generally started, indoor air pressure is greater than outdoor air pressure by conveying fresh air to the indoor, a micro-positive pressure environment is formed, the indoor pollutants can be discharged outwards through a gap, and outdoor pollutants cannot enter the indoor environment.
The air output of the current fresh air system is generally a preconfigured parameter or is set by a user, however, in the air supply process, the air leakage amount of the indoor environment can be changed due to opening and closing of doors and windows, so that the air output of the fresh air system is insufficient or too much, the micro-positive pressure environment cannot be maintained indoors, and the indoor environment quality is difficult to guarantee.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a control method of fresh air equipment, which aims to adapt to the change of air leakage caused by opening and closing conditions of doors and windows and the like in an indoor positive pressure state, accurately evaluate the fresh air quantity required by the indoor positive pressure state, effectively maintain the positive pressure state in an indoor environment and ensure the air quality of the indoor environment.
In order to achieve the above object, the present invention provides a fresh air device control method, including the steps of:
under the condition that the fresh air equipment supplies air according to the set air volume required by the set positive pressure state, if the on-off state of the barrier piece changes, determining the variation of air leakage in the action space of the fresh air equipment corresponding to the change of the on-off state; the barrier piece is arranged at a vent between the fresh air equipment action space and the external environment;
determining a first target fresh air volume according to the variable quantity and the set air volume;
and controlling the air supply of the fresh air equipment according to the first target fresh air quantity.
Optionally, the step of determining the amount of change in the air leakage from the fresh air device acting space corresponding to the change in the switch state includes:
acquiring state change characteristic information corresponding to the change of the switch state, acquiring wind speed change characteristic information corresponding to the change of the switch state, and acquiring ventilation area change information of the ventilation opening corresponding to the change of the switch state;
and determining the variation according to the state variation characteristic information, the wind speed variation characteristic information and the ventilation area variation information.
Optionally, the step of acquiring state change characteristic information corresponding to the change of the switch state includes:
determining air pressure change characteristic parameters in the action space of the fresh air equipment within a set time period;
and acquiring state change characteristic information corresponding to the change of the switch state according to the air pressure change characteristic parameters.
Optionally, the step of determining the characteristic parameter of the air pressure change in the action space of the fresh air device within the set time period includes:
acquiring a plurality of air pressure data in the action space of the fresh air equipment, which are acquired in the set time period;
determining the air pressure change amplitude and the change trend between two adjacent air pressure data which are collected successively;
in the collected air pressure data, determining a first characteristic parameter and a second characteristic parameter according to the air pressure change amplitude and the change trend as the air pressure change characteristic parameters;
the first characteristic parameter is two adjacent air pressure data of which the air pressure variation amplitude is greater than or equal to a first threshold value and the variation trend is a first trend, and the second characteristic parameter is two adjacent air pressure data of which the air pressure variation amplitude is greater than or equal to a second threshold value and the variation trend is a second trend.
Optionally, the step of obtaining state change characteristic information corresponding to the change of the switch state according to the air pressure change characteristic parameter includes:
determining the time intervals and the number of the first characteristic parameter and the second characteristic parameter;
determining the number of times of the switch state change according to the number, and determining the duration information of the switch state change according to the time interval;
and taking the times and the duration information as the state change characteristic information.
Optionally, the step of acquiring wind speed change characteristic information corresponding to the change of the switch state includes:
acquiring a differential pressure value corresponding to the set positive pressure state;
and acquiring the wind speed change characteristic information according to the differential pressure value.
Optionally, the fresh air device control method further includes:
acquiring the air pressure change amplitude in the action space of the fresh air equipment within a set time length in the condition that the fresh air equipment supplies air according to a set air volume required by a set positive pressure state;
and when the air pressure change amplitude is larger than or equal to a third threshold value, determining that the switch state of the blocking piece is changed.
Optionally, before the step of controlling the air supply of the fresh air device according to the first target fresh air volume, the method further includes:
acquiring personnel information in the action space of the fresh air equipment;
determining a second target fresh air volume corresponding to the personnel information;
when the first target fresh air volume is larger than or equal to the second target fresh air volume, executing the step of controlling the air supply of the fresh air equipment according to the first target fresh air volume;
when the first target fresh air volume is smaller than the second target fresh air volume, controlling the air supply of the fresh air equipment according to the second target fresh air volume; and/or the presence of a gas in the atmosphere,
after the step of controlling the air supply of the fresh air equipment according to the first target fresh air volume, the method further comprises the following steps of:
acquiring the current pressure difference between the acting space of the fresh air equipment and the external environment and the target pressure difference corresponding to the set positive pressure state;
and when the current pressure difference is matched with the target pressure difference, controlling the air supply of the fresh air equipment according to the set air volume.
In addition, in order to realize above-mentioned purpose, this application still provides a new trend equipment, new trend equipment includes: the fresh air equipment control method comprises a memory, a processor and a fresh air equipment control program which is stored on the memory and can run on the processor, wherein when the fresh air equipment control program is executed by the processor, the steps of the fresh air equipment control method are realized.
In addition, in order to achieve the above object, the present application also provides a readable storage medium, where a fresh air device control program is stored, and when the fresh air device control program is executed by a processor, the steps of the fresh air device control method are implemented as described in any one of the above.
The method comprises the steps that when the fresh air equipment is supplied with air according to a set air volume required by a set positive pressure state, if the switch state of a blocking piece of a vent arranged between an action space of the fresh air equipment and the external environment is changed, the variation of air leakage in the fresh air setting action space corresponding to the change of the switch state is determined, the set fresh air volume in the original positive pressure state is corrected based on the variation to obtain a first target fresh air volume, and the fresh air equipment controls the air supply of the fresh air equipment according to the first target fresh air volume. According to the method, when the opening and closing state of the barrier member of the ventilation openings such as doors and windows changes in the acting space of the fresh air equipment, the fresh air equipment does not supply air according to the original set air volume any more, but adapts to the change of space air leakage caused by the change of the opening and closing state of the barrier member of the ventilation openings such as doors and windows, the original set air volume is adjusted, the fresh air volume required by the indoor positive pressure state is accurately evaluated, the indoor environment can effectively maintain the positive pressure state after the opening and closing state of the barrier member of the ventilation openings such as doors and windows changes, and the indoor environment air quality is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a hardware structure involved in the operation of an embodiment of the fresh air device of the present invention;
FIG. 2 is a schematic flow chart of an embodiment of a control method for a fresh air device according to the present invention;
FIG. 3 is a schematic flow chart of another embodiment of a control method for a fresh air device according to the present invention;
FIG. 4 is a schematic flow chart illustrating a control method of a fresh air device according to another embodiment of the present invention;
fig. 5 is a schematic flow chart of a control method of a fresh air device according to still another embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: under the condition that the fresh air equipment supplies air according to the set air volume required by the set positive pressure state, if the on-off state of the barrier piece changes, determining the variation of air leakage in the action space of the fresh air equipment corresponding to the change of the on-off state; the barrier piece is arranged at a vent between the fresh air equipment action space and the external environment; determining a first target fresh air volume according to the variable quantity and the set air volume; and controlling the air supply of the fresh air equipment according to the first target fresh air quantity.
Because among the prior art, the air output of present new trend system is the parameter of configuration in advance or by user's setting, however in the in-process of air supply, the switch of door and window can lead to the change of indoor environment air leakage volume, leads to new trend system air output not enough or too much like this, and the pressure environment is slightly maintained in indoor unable, is difficult to guarantee indoor environment quality.
The invention provides the solution, and aims to adapt to the change of air leakage caused by opening and closing conditions of doors and windows and the like in an indoor positive pressure state, accurately evaluate the fresh air quantity required by the indoor positive pressure state, effectively maintain the positive pressure state in an indoor environment and ensure the air quality of the indoor environment.
The invention provides a fresh air device which can be a device with a single fresh air function and a multifunctional device integrated with a fresh air device. The fresh air equipment is specifically used for inputting fresh air with the pollutant concentration lower than a set threshold value for the indoor environment so as to ensure the air quality of the indoor environment. In this embodiment, the fresh air device has an air conditioner with a fresh air function.
Fresh air equipment can specifically include fresh air supply assembly (such as fresh air fan, fresh air outlet's air guide assembly etc.) and purification module, is equipped with the fresh air wind channel that is used for the indoor outer environment of intercommunication in the fresh air equipment, and fresh air supply assembly 1 and purification module all locate the fresh air wind channel. When the fresh air supply assembly 1 is started (if the air guide assembly opens the air outlet and the fresh air fan is started), outdoor air is purified by the purification module to be air meeting indoor purification requirements and then is conveyed indoors.
In other embodiments, the fresh air device may not include a fresh air supply component, but may be a control device with a single fresh air regulation function, and the control device may be connected to the fresh air supply component in another device to regulate and control the fresh air output amount in the indoor environment.
In an embodiment of the present invention, referring to fig. 1, the fresh air device includes: a processor 1001 (e.g., a CPU), a memory 1002, a barometric pressure sensor 1003, a timer 1004, and the like. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.
The air pressure sensor 1003 is used for detecting air pressure data in the action space of the fresh air equipment. The baroceptor 1003 can be arranged in the space or on the fresh air device. Specifically, the air pressure sensor 1003 can be arranged far away from an air outlet or an air return opening of the fresh air device (such as an air return opening of a fresh air conditioner) so as to reduce the influence of air flow disturbance on the detection data of the air pressure sensor 1003 and ensure the accuracy of the data detected by the air pressure sensor 1003. The timer 1004 is used for counting time information required in the air outlet control process of the fresh air equipment.
The processor 1001 is communicatively connected to the memory 1002, the air pressure sensor 1003, and the timer 1004, respectively. The processor 1001 may acquire data detected by it from the air pressure sensor 1003 and the timer 1004. The processor 1001 may also store desired data in the memory 1002 or retrieve data in the memory 1002 as needed. In addition, the processor 1001 can also be connected with a fresh air supply component 1 in the fresh air equipment to regulate and control the operation of the fresh air supply component 1.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a fresh air device control program may be included in the memory 1002 as a readable storage medium. In the apparatus shown in fig. 1, the processor 1001 may be configured to call a fresh air device control program stored in the memory 1002, and perform operations of relevant steps of a fresh air device control method in the following embodiments.
The invention also provides a control method of the fresh air equipment.
Referring to fig. 2, an embodiment of a control method for a fresh air device according to the present invention is provided, where the control method for the fresh air device includes:
step S10, determining the variation of air leakage in the action space of the fresh air equipment corresponding to the variation of the on-off state if the on-off state of the barrier changes under the condition that the fresh air equipment supplies air according to the set air volume required by the set positive pressure state; the barrier piece is arranged at a vent between the fresh air equipment action space and the external environment;
the space (hereinafter referred to as space) acted by the fresh air equipment is communicated with the air outlet of the fresh air equipment, the air quality can be regulated and controlled through the air outlet of the fresh air equipment, and the space area has a limited area size. For example, the space acted on by the fresh air device can be a bedroom, a meeting room, a bathroom and the like.
The positive pressure setting state is specifically a state in which the air pressure in the space is greater than the outdoor air pressure and the difference between the indoor and outdoor air pressures is a target pressure difference. The target pressure difference can be specifically set according to actual requirements. For example, when it is desired to bring the space to a micro-positive pressure state, the target pressure difference may be specifically +5 Pa.
The set air volume refers to the fresh air volume required by the set positive pressure state when the action space of the fresh air equipment is closed or the air leakage volume is constant. The set air volume can be obtained through preset data, and is further analyzed and obtained according to the detection data of the actual situation of the space. Different set positive pressure states correspond to different set air volumes. For example, the set air volume may be determined according to a fresh air volume required to reach the set positive pressure state when the space is in the sealed state and a current air leakage volume of the space. The air leakage quantity can be determined based on air pressure change parameters in the air outlet space of the fresh air equipment according to the set air quantity.
When the fresh air equipment is used for supplying air according to the set air volume, the space is in a set positive pressure state, and under the state, whether the opening and closing states of the barrier piece arranged on the ventilation opening of the space and the external environment are changed or not is monitored. Specifically, whether the switch state of the monitoring barrier changes can be judged by monitoring whether a specific instruction exists. The specific instruction can be sent out by a user when the switch state of the barrier is changed; or the sensor arranged on the channel port and/or the blocking piece detects the characteristic parameter corresponding to the change of the switch state of the blocking piece. In addition, whether the on-off state of the blocking piece changes can be obtained by monitoring the air pressure change condition in the space.
The variation of the air leakage refers to the deviation of the air leakage before and after the change of the on-off state of the blocking member. Specifically, the air leakage amount before the change of the on-off state of the blocking member is obtained as a first air leakage amount, the air leakage amount after the change of the on-off state of the blocking member is obtained as a second air leakage amount, and the difference between the first air leakage amount and the second air leakage amount is calculated to obtain the variation of the air leakage. The air leakage quantity of the space can be obtained based on the analysis of the air pressure change characteristic parameters of the space. In addition, the variation of the air leakage of the space corresponding to the variation of the opening and closing state of the blocking piece can be analyzed and obtained through at least one of parameters related to the variation of the air leakage, such as the air pressure variation of the space, the variation information of the ventilation area of the passage opening, the air speed of the airflow at the passage opening, the characteristic of the variation of the opening and closing state, the variation of the indoor and outdoor pressure difference and the like in the process of the variation of the opening and closing state of the blocking piece.
A vent here refers to a passage for the passage of air between a space and the outside environment. The barrier is particularly useful for closing a vent to block the passage of air flow between the space and the external environment. When the vent is not closed by the barrier, the space can be communicated with the airflow of the external environment; when the barrier closes the vent, the space is not in communication with the airflow of the external environment. The barrier may in particular comprise a spatially corresponding door and/or window or the like. Based on this, the change in the opening and closing state of the blocking member may include a change in the position of the blocking member that increases the gas flow area of the vent (e.g., the door is switched from the closed state to the open state), and a change in the position of the blocking member that decreases the gas flow area of the vent (e.g., the door is switched from the open state to the closed state).
Specifically, the characteristics of the amount of variation in the leakage air are different depending on the change in the opening/closing state of the blocking member. The change of the switch state comprises that when the blocking piece is switched from the open state to the closed state, the variation of the air leakage is more than 0, namely the air leakage quantity after the switch state of the blocking piece is changed is more than the air leakage quantity before the switch state of the blocking piece is changed; the change of the on-off state comprises that when the blocking piece is switched from the off state to the on state, the variation of the air leakage is less than 0, namely the air leakage rate after the on-off state of the blocking piece is changed is less than the air leakage rate before the on-off state of the blocking piece is changed. When the on-off state change includes more than one change of the blocking piece between the off state and the on state (such as on-off-on-off, off-on-off-on, off-on-off and the like), the variation of the air leakage is greater than 0 when the on-off state is changed from the off state to the on state for the first time, namely the air leakage rate of the blocking piece after the on-off state is changed is greater than the air leakage rate of the blocking piece before the on-off state is changed, and the variation of the air leakage is less than 0 when the on-off state is changed from the on state to the off state for the first time, namely the air leakage rate of the blocking piece after the on-off state is changed is less than the air leakage rate of the blocking piece before the on-off state is changed.
Step S20, determining a first target fresh air volume according to the variable quantity and the set air volume;
specifically, the sum of the air leakage rate and the first fresh air rate is set as the target fresh air rate. For example, when the barrier is in a position closing the vent before the change of the on-off state of the barrier, and the on-off state of the barrier is switched from the off state to the on state, the air leakage rate of the space increases, the amount of change in the air leakage is + Q, the set air volume is defined as L, and the first target fresh air volume is L + Q; for another example, when the barrier is at a position to open the vent before the on-off state of the barrier changes, and the on-off state of the barrier is switched from the open state to the closed state, the air leakage rate of the space is decreased, the amount of change in air leakage is-Q, the set air rate is defined as L, and the first target fresh air rate is L-Q.
And step S30, controlling the air supply of the fresh air equipment according to the first target fresh air quantity.
And controlling the operation of an air supply component (such as a fresh air fan) of the fresh air equipment according to the first target fresh air quantity so that the fresh air equipment can supply air with the air supply quantity larger than or equal to the first target fresh air quantity.
According to the control method of the fresh air equipment, when the fresh air equipment is supplied with air according to the set air volume required by the set positive pressure state, if the switch state of the blocking piece of the vent arranged between the action space of the fresh air equipment and the external environment is changed, the variation of air leakage in the fresh air setting action space corresponding to the change of the switch state is determined, the set fresh air volume in the original positive pressure state is corrected based on the variation to obtain the first target fresh air volume, and the fresh air equipment controls the air supply of the fresh air equipment according to the first target fresh air volume. According to the method, when the opening and closing state of the barrier member of the ventilation openings such as doors and windows changes in the acting space of the fresh air equipment, the fresh air equipment does not supply air according to the original set air volume any more, but adapts to the change of space air leakage caused by the change of the opening and closing state of the barrier member of the ventilation openings such as doors and windows, the original set air volume is adjusted, the fresh air volume required by the indoor positive pressure state is accurately evaluated, the indoor environment can effectively maintain the positive pressure state after the opening and closing state of the barrier member of the ventilation openings such as doors and windows changes, and the indoor environment air quality is guaranteed.
Further, in this embodiment, when the opening/closing state of the blocking member is changed and then returns to the opening/closing state before the change (for example, the door is originally in the closed state and is switched to the open state and then returns to the closed state), the current pressure difference between the acting space of the fresh air device and the external environment and the target pressure difference corresponding to the set positive pressure state are obtained; and when the current pressure difference is matched with the target pressure difference, controlling the air supply of the fresh air equipment according to the set air volume. Specifically, a pressure difference range can be formed based on the target pressure difference and a certain allowable deviation, and when the current pressure difference is within the pressure difference range, it is determined that the current pressure difference is matched with the target pressure difference; and when the current pressure difference is outside the pressure difference range, judging that the current pressure difference is not matched with the target pressure difference. The current pressure difference is matched with the target pressure difference, which indicates that the current space is restored to a set positive pressure state before the switch state of the barrier changes, namely the original set air volume can ensure the maintenance of the set positive pressure state in the space, and the original set air volume can be restored to supply air so that the space can be maintained in the required set positive pressure state; the current pressure difference is not matched with the target pressure difference, which indicates that the current space is not restored to the set positive pressure state before the switch state of the barrier changes, so the step S30 can be executed again until the current pressure difference is matched with the target pressure difference, so as to maintain the set positive pressure state in the space.
Further, based on the above embodiment, another embodiment of the control method for the fresh air device is provided. In this embodiment, referring to fig. 3, the step of determining the variation of the air leakage in the fresh air device acting space corresponding to the change of the switch state includes:
step S11, acquiring state change characteristic information corresponding to the change of the switch state, acquiring wind speed change characteristic information corresponding to the change of the switch state, and acquiring ventilation area change information of the ventilation opening corresponding to the change of the switch state;
the state change characteristic information refers to characteristic information for characterizing the change characteristics of the switch state of the barrier, and specifically includes the type of the change of the switch state (including on-off switching to off, off-on switching to on), duration information of the change of the switch state, the number of times of the change of the switch state, and the like. The wind speed change characteristic information refers to characteristic information of wind speed change of the vent caused by the change of the opening and closing state of the barrier, and specifically includes a change amplitude or a change rate (change amount per unit time) of the wind speed and the like. The ventilation area variation information refers to the information representing the size of the range in which the ventilation opening can be used for air flow circulation caused by the variation of the opening and closing state of the barrier.
The state change characteristic information can be obtained by inputting parameters by a user, and can also be obtained by detecting the position of the barrier, analyzing data such as air pressure change parameters in space and the like.
The wind speed change characteristic information can be directly detected by a wind speed sensor arranged at the opening of the channel, and can also be detected by other parameters influencing the wind speed, and the characteristics of the wind speed are obtained as the wind speed change characteristic information based on the detected parameter analysis. Specifically, in this embodiment, in order to ensure that the amount of variation of the air leakage determined by the obtained wind speed variation characteristic information can ensure that the indoor positive pressure state is maintained, a pressure difference value corresponding to the set positive pressure state may be obtained, and the wind speed variation characteristic information may be obtained according to the pressure difference value. The differential pressure value here refers to a pressure deviation between the space and the external environment in the set positive pressure state. The differential pressure value can be obtained by obtaining a target differential pressure corresponding to a preset positive pressure state, and in order to ensure accuracy, the differential pressure values obtained by detection can be used as the differential pressure values by respectively detecting the current indoor and outdoor pressures. And pre-establishing a corresponding relation between the differential pressure value and the wind speed change characteristic information, and determining the wind speed change characteristic information corresponding to the differential pressure value based on the corresponding relation. In this embodiment, the wind speed variation characteristic information may be specifically a wind speed variation, a pre-fit differential pressure valueAnd the calculation formula is used for calculating the variation of the wind speed of the ventilation opening before and after the opening and closing state of the plugging piece is changed by setting the pressure difference value of the positive pressure state based on the calculation formula. For example, the calculation formula may be specifically V ═ 1.29 ═ Δ P1/2Wherein V is wind speed change characteristic information, delta P is a differential pressure value, and when the delta P is 10Pa, V can be calculated to be 4.08 m/s. Specifically, the plugging piece is a door as an example, when the door is originally in a closed state, the wind speed of the ventilation opening corresponding to the front door when the door is opened is 0, and the wind speed of the ventilation opening corresponding to the lower door is changed to 4.08m/s when the door is driven to be in a positive pressure state delta P of 10Pa after the door is opened; when the door is originally in an open state, the wind speed of the vent corresponding to the lower door is driven to be 4.08m/s when the positive pressure state delta P is 10Pa, and the wind speed change of the vent corresponding to the door after the door is closed is 0.
The ventilation area change information can be obtained by acquiring parameters input by a user or by acquiring standard parameter analysis of the ventilation opening design. For example, if the door area is 2.1m high and 1m wide according to the domestic building standard, the door area is 2.1 × 1 to 2.1m2. Therefore, when the door opening and closing state is changed, the change information of the ventilation area is 2.1m2。
And step S12, determining the variation according to the state variation characteristic information, the wind speed variation characteristic information and the ventilation area variation information.
And different state change characteristic information, wind speed change characteristic information and ventilation area change information correspond to different variable quantities of air leakage quantity. The state change characteristic information, the wind speed change characteristic information, the ventilation area change information and the variation can be preset with corresponding relations (can be mapping tables, calculation formulas and the like). Based on the corresponding relation, the variation of the space air leakage caused by the change of the switch state of the barrier can be determined according to the currently acquired state change characteristic information, the wind speed change characteristic information and the ventilation area change information. Specifically, when the state change characteristic information includes the number of changes and the duration, the amount of change Q of the air leakage may be calculated by a calculation formula Q ═ S × V × T × N, where S is the ventilation area change information, V is the wind speed change characteristic information, and T is the time information of the changes (e.g., on-time)The time length of the door closing state when the door is switched to the door closing state), and N is the number of times of change. For example, when the door is originally closed, the number of times of opening the door in 1 hour is 1, and the duration of the door in the opened state is 3 seconds, the change of the ventilation area in combination with the above-described opening of the door is 2.1m2And when the wind speed change characteristic information is 4.08m/s, the change of the air leakage is calculated to be about 25.7m by the formula3/h。
In this embodiment, the variation of air leakage in the space is determined by combining the state variation characteristic information, the wind speed variation characteristic information and the ventilation area variation information, and the accuracy of the determined variation is ensured, so that the accuracy of fresh air supply regulation and control is further improved, the reliability of indoor positive pressure state maintenance is improved, and the indoor environment quality is ensured.
Further, based on the above embodiment, another embodiment of the control method for the fresh air device is provided. In this embodiment, referring to fig. 4, the step S11 includes:
step S111, determining air pressure change characteristic parameters in the action space of the fresh air equipment within a set time period;
the length of the set time period can be set according to actual requirements, and can be set to 1 hour, for example. The set time period includes the time when the switch state of the blocking member changes. The starting time of the set time period may be before the time when the on-off state of the blocking member changes, or may be the time when the on-off state of the blocking member changes for the first time.
And in a set time period, continuously or at set intervals, detecting air pressure data in the action space of the fresh air equipment by an air pressure sensor. The air pressure change characteristic parameter is characterized by a parameter of space air pressure change characteristics caused by the change of the switch state of the blocking piece in a set time period. And analyzing the acquired air pressure data in a set time period to obtain an air pressure change curve, an air pressure change quantity, an air pressure change rate (air pressure change quantity in unit time) and/or an air pressure change trend (increasing or decreasing), and then further extracting air pressure change characteristic parameters from the air pressure change curve, the air pressure change quantity, the air pressure change rate and/or the air pressure change trend.
Specifically, in this embodiment, a plurality of air pressure data in the action space of the fresh air device collected within the set time period are obtained; determining the air pressure change amplitude and the change trend between two adjacent air pressure data which are collected successively; in the collected air pressure data, determining a first characteristic parameter and a second characteristic parameter according to the air pressure change amplitude and the change trend as the air pressure change characteristic parameters; the first characteristic parameter is two adjacent air pressure data of which the air pressure variation amplitude is greater than or equal to a first threshold value and the variation trend is a first trend, and the second characteristic parameter is two adjacent air pressure data of which the air pressure variation amplitude is greater than or equal to a second threshold value and the variation trend is a second trend. The method comprises the steps of acquiring air pressure data in a space at intervals of set duration within a set time period to obtain a plurality of air pressure data. And determining the deviation amount of the two air pressure data which are sequentially collected as the air pressure change amplitude. And comparing the magnitude of the front air pressure data and the magnitude of the rear air pressure data, determining that the change trend is a first trend when the front air pressure data is greater than the rear air pressure data, and determining that the change trend is a second trend when the rear air pressure data is greater than the front air pressure data. The first threshold value and the second threshold value can be set according to actual requirements, and the characteristic values of the air pressure change amplitude respectively corresponding to the switching of the plugging piece from closing to opening and from opening to closing are represented. For example, the first threshold and the second threshold may be within a range of [40Pa, 60Pa ]. When the air pressure change amplitude is larger than or equal to the first threshold value and the air pressure in the space is reduced, it can be considered that the air pressure in the space is reduced because the blocking piece is switched from closing to opening (such as door opening action) in the space; when the air pressure variation amplitude is greater than or equal to the second threshold value and the air pressure in the space is increased, it can be considered that the indoor air pressure is increased when the plugging member is switched from opening to closing (such as door closing action) in the space. Therefore, based on the air pressure variation amplitude and the variation trend, a first characteristic parameter used for representing the switching of the plugging piece from the closing state to the opening state and a second characteristic parameter used for representing the switching of the plugging piece from the opening state to the closing state in the air pressure data collected in the set time period can be analyzed and obtained, and the first characteristic parameter and the second characteristic parameter can be used as the air pressure variation characteristic parameters.
Step S112, obtaining state change characteristic information corresponding to the change of the switch state according to the air pressure change characteristic parameter.
The difference of the state change of the blocking piece from opening to closing and from closing to opening can cause the difference of the air pressure change in the space, so that different air pressure change characteristic parameters can correspondingly represent different state change characteristic information. For example, a greater amount of change in the air pressure per unit time may indicate a greater magnitude of change in the position of the closure; for another example, the more the number of times that the magnitude of the change in the pressure data is greater than the set threshold value, the more the number of times that the state of the plugging member changes in the period of time is indicated, and the like. Based on the relationship, the correlation between the air pressure change characteristic parameter and the state change characteristic information can be determined, and based on the correlation, the current air pressure change characteristic parameter in the space can be used
Specifically, when the air pressure change characteristic parameters include the first characteristic parameter and the second characteristic parameter, the time interval and the number of the first characteristic parameter and the second characteristic parameter are determined; determining the number of times of the switch state change according to the number, and determining the duration information of the switch state change according to the time interval; and taking the times and the duration information as the state change characteristic information. Specifically, when the number of the first characteristic parameter and the number of the second characteristic parameter in the air pressure variation characteristic parameter are both one, the number of times of determination is one, and the difference between the acquisition time of the first characteristic parameter and the acquisition time of the second characteristic parameter is determined as the time interval here. When one of the first characteristic parameter and the second characteristic parameter in the air pressure change characteristic parameter is more than one, the first characteristic parameter and the second characteristic parameter can be sequenced according to time acquisition, the time difference of the acquisition time corresponding to two adjacent characteristic parameters can be determined, all the obtained time differences can be used as the time interval of the time, and part of the time differences meeting the conditions can be selected from the obtained time differences to be used as the time interval of the time; in addition, the numbers of the first characteristic parameter and the second characteristic parameter are counted respectively, the counted numbers can be both taken as the number of times, and the larger value of the counted numbers can also be taken as the number of times. For example, when the door is originally in a closed state, a door opening action (the closure is switched from closed to open) occurs in a set time period, it may be determined that a change occurs in the opening and closing state of the barrier, if a first characteristic parameter representing the door opening action (the closure is switched from closed to open) and a second characteristic parameter representing the door closing action (the closure is switched from open to closed) are obtained based on analysis of air pressure data in the set time period, the first characteristic point (door opening), the second characteristic point (door closing), the third characteristic point (door opening) and the fourth characteristic point (door closing) are respectively marked according to the time collection sequence, specifically, the number of the characteristic points representing the door opening is used as the number of times that the opening and closing state changes, the characteristic points representing the door opening are respectively used as starting times, and a difference value of the collection time of the characteristic point of the next door closing adjacent to each starting time and the corresponding characteristic point is respectively determined, namely, a first time difference between the first characteristic point and the second characteristic point is determined, a second time difference between the third characteristic point and the fourth characteristic point is determined, and the time length information of the switch state change is determined according to the first time difference and the second time difference.
Further, the fresh air device control method further includes: the method can also comprise the following steps:
step S01, acquiring the air pressure change amplitude in the action space of the fresh air equipment within a set time length in the air supply state of the fresh air equipment according to the set air volume required by the set positive pressure state;
specifically, the air pressure data in the acting space of the fresh air device can be detected by the air pressure sensor within the set time period and continuously or at intervals of a set time length (the set time length is less than the set time period). The air pressure change parameter is characterized by the air pressure change characteristic in a set time period. The pressure variation curve, the pressure variation amount and/or the pressure variation rate (pressure variation amount in unit time length) are obtained by analyzing the pressure data collected in the set time period, and the pressure variation amplitude in the space in the set time length can be obtained by analyzing the parameters (such as the pressure variation amount, the pressure variation rate and the size of the extreme value in the pressure variation curve).
And step S02, when the air pressure change amplitude is larger than or equal to a third threshold value, determining that the switch state of the blocking piece is changed. After determining that the switching state of the blocking member has changed, step S11 may be executed.
The third threshold may be set according to actual conditions, and may be set to the same value as the first threshold and the second threshold. The magnitude of the change in the air pressure greater than or equal to the third threshold may be considered to be the presence of the first characteristic parameter or the second characteristic parameter in the air pressure data.
The air pressure change amplitude is larger than or equal to the third threshold value, and the air pressure in the space can be considered to generate sudden change due to the change of the switch state of the blocking piece; if the air volume is smaller than the third threshold value, the fact that the opening and closing state of the blocking piece is not changed can be judged, therefore, the air pressure change amplitude is small, the set positive pressure state is not affected, and the air supply of the fresh air equipment can be controlled according to the set air volume.
Further, after step S02, the type of the switch state change (on-to-off or off-to-on) may also be determined based on the air pressure data analysis air pressure change trend (increase or decrease).
In addition, in other embodiments, steps S01 and S02 may be executed in synchronization with step S111, and when the air pressure data in the set time period determines that the characteristic parameter of the air pressure change exists, the switch state of the blocking member may be determined to be changed, and when the air pressure data in the set time period does not have the characteristic parameter of the air pressure change, the switch state of the blocking member may be determined not to be changed.
In this embodiment, the state change characteristic information of the current switch state change is analyzed based on the air pressure change in the space, on one hand, the user operation can be simplified without parameter input by the user, and on the other hand, the influence of the occurrence of the switch state change on the air pressure state in the space can be accurately represented by the space air pressure change.
Further, based on any one of the above embodiments, a further embodiment of the control method for the fresh air device is provided. In this embodiment, referring to fig. 5, before the step S30, the method further includes:
step S21, acquiring personnel information in the action space of the fresh air equipment;
the person information may specifically include the number, type, etc. of the persons present in the action space. Specifically, the person information may be obtained by acquiring a user input parameter or by human body detection information (e.g., infrared detection information).
Step S22, determining a second target fresh air volume corresponding to the personnel information;
different personnel information corresponds to different second target fresh air volume. Specifically, when the person information is the number of people, the fresh air volume required by each person can be acquired, and the total fresh air volume is calculated and obtained as the second target fresh air volume based on the acquired fresh air volume and the number of people. For example, when the number of people in the room is detected to be 4, according to the fresh air volume: 30m3The new air volume requirement is Q120 m per person3/h。
Step S23, determining whether the first target fresh air volume is greater than or equal to a second target fresh air volume;
if yes, go to step S30; if not, step S24 is executed.
And step S24, controlling the air supply of the fresh air equipment according to the second target fresh air quantity.
In this embodiment, through carrying out the comparison with first target fresh air volume and second target fresh air volume, regard the fresh air volume that numerical value is great as the target air volume of control new trend equipment to make the air-out of new trend equipment can compromise simultaneously the maintenance of indoor malleation state and indoor personnel's new trend demand, guarantee indoor environmental quality and guarantee user's travelling comfort in the space simultaneously.
In addition, an embodiment of the present invention further provides a readable storage medium, where a fresh air device control program is stored on the readable storage medium, and when the fresh air device control program is executed by a processor, the steps related to any embodiment of the above fresh air device control method are implemented.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a new air device, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A fresh air equipment control method is characterized by comprising the following steps:
under the condition that the fresh air equipment supplies air according to the set air volume required by the set positive pressure state, if the on-off state of the barrier piece changes, determining the variation of air leakage in the action space of the fresh air equipment corresponding to the change of the on-off state; the barrier piece is arranged at a vent between the fresh air equipment action space and the external environment;
determining a first target fresh air volume according to the variable quantity and the set air volume;
and controlling the air supply of the fresh air equipment according to the first target fresh air quantity.
2. The fresh air device control method according to claim 1, wherein the step of determining a variation amount of air leakage in the fresh air device operating space corresponding to the change in the switch state includes:
acquiring state change characteristic information corresponding to the change of the switch state, acquiring wind speed change characteristic information corresponding to the change of the switch state, and acquiring ventilation area change information of the ventilation opening corresponding to the change of the switch state;
and determining the variation according to the state variation characteristic information, the wind speed variation characteristic information and the ventilation area variation information.
3. The fresh air device control method according to claim 2, wherein the step of acquiring state change characteristic information corresponding to the change in the switch state includes:
determining air pressure change characteristic parameters in the action space of the fresh air equipment within a set time period;
and acquiring state change characteristic information corresponding to the change of the switch state according to the air pressure change characteristic parameters.
4. The fresh air device control method according to claim 3, wherein the step of determining the characteristic parameter of the air pressure change in the operating space of the fresh air device within the set time period includes:
acquiring a plurality of air pressure data in the action space of the fresh air equipment, which are acquired in the set time period;
determining the air pressure change amplitude and the change trend between two adjacent air pressure data which are collected successively;
in the collected air pressure data, determining a first characteristic parameter and a second characteristic parameter according to the air pressure change amplitude and the change trend as the air pressure change characteristic parameters;
the first characteristic parameter is two adjacent air pressure data of which the air pressure variation amplitude is greater than or equal to a first threshold value and the variation trend is a first trend, and the second characteristic parameter is two adjacent air pressure data of which the air pressure variation amplitude is greater than or equal to a second threshold value and the variation trend is a second trend.
5. The fresh air device control method according to claim 4, wherein the step of obtaining state change characteristic information corresponding to the change of the switch state according to the air pressure change characteristic parameter includes:
determining the time intervals and the number of the first characteristic parameter and the second characteristic parameter;
determining the number of times of the switch state change according to the number, and determining the duration information of the switch state change according to the time interval;
and taking the times and the duration information as the state change characteristic information.
6. The fresh air device control method according to claim 2, wherein the step of acquiring wind speed change characteristic information corresponding to the change in the switch state includes:
acquiring a differential pressure value corresponding to the set positive pressure state;
and acquiring the wind speed change characteristic information according to the differential pressure value.
7. The fresh air device control method according to any one of claims 1 to 6, further comprising:
acquiring the air pressure change amplitude in the action space of the fresh air equipment within a set time length in the condition that the fresh air equipment supplies air according to a set air volume required by a set positive pressure state;
and when the air pressure change amplitude is larger than or equal to a third threshold value, determining that the switch state of the blocking piece is changed.
8. The fresh air device control method according to any one of claims 1 to 6, wherein, before the step of controlling the supply air of the fresh air device according to the first target fresh air volume, the method further comprises:
acquiring personnel information in the action space of the fresh air equipment;
determining a second target fresh air volume corresponding to the personnel information;
when the first target fresh air volume is larger than or equal to the second target fresh air volume, executing the step of controlling the air supply of the fresh air equipment according to the first target fresh air volume;
when the first target fresh air volume is smaller than the second target fresh air volume, controlling the air supply of the fresh air equipment according to the second target fresh air volume; and/or the presence of a gas in the atmosphere,
after the step of controlling the air supply of the fresh air equipment according to the first target fresh air volume, the method further comprises the following steps of:
acquiring the current pressure difference between the acting space of the fresh air equipment and the external environment and the target pressure difference corresponding to the set positive pressure state;
and when the current pressure difference is matched with the target pressure difference, controlling the air supply of the fresh air equipment according to the set air volume.
9. The utility model provides a new trend equipment, its characterized in that, new trend equipment includes: a memory, a processor, and a fresh air device control program stored on the memory and executable on the processor, the fresh air device control program when executed by the processor implementing the steps of the fresh air device control method according to any one of claims 1 to 8.
10. A readable storage medium, wherein a fresh air device control program is stored on the readable storage medium, and when executed by a processor, the steps of the fresh air device control method according to any one of claims 1 to 8 are implemented.
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