CN109737556B - Control method of ceiling type fresh air handling unit - Google Patents
Control method of ceiling type fresh air handling unit Download PDFInfo
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- CN109737556B CN109737556B CN201811622328.1A CN201811622328A CN109737556B CN 109737556 B CN109737556 B CN 109737556B CN 201811622328 A CN201811622328 A CN 201811622328A CN 109737556 B CN109737556 B CN 109737556B
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Abstract
The invention discloses a control method of a suspended ceiling type fresh air handling unit, wherein the service life of a filter assembly is prompted by combining data of a sensor assembly according to big data simulation of an Internet of things mode and different matching use of the specification, the model and the performance of the filter; whether the running state and the mode of the total heat exchange module and the fresh air handling unit are started by the fresh air handling unit or not is comprehensively judged by combining the sensor assembly with outdoor atmospheric data published by the country, so that the energy is saved, and meanwhile, the fresh air handling unit can be effectively controlled to be in an ideal running state.
Description
Technical Field
The patent relates to a new fan field especially relates to a new fan unit's control mode and new fan.
Background
The utilization rate of the existing air conditioners in public places and families is higher and higher, people are in a closed environment for a long time, the indoor air quality is poor due to lack of necessary air circulation, discomfort and disease transmission are easily caused, although some families can use the air purifier product, the air purifier adopts an internal circulation mode to purify indoor air and pollutants leaked outdoors through doors and windows, and after a long time, the indoor environment is suffocated, so that measures are needed to be taken for air exchange, outdoor fresh air is introduced under the condition of not opening the windows, and harmful turbid air in the indoor environment is removed. At present, new fan systems have been developed in the market for ventilation of indoor and outdoor air.
For better energy conservation and improvement of cleanliness and freshness index of indoor air, it is necessary to add an assembly with a total heat exchange function when designing a fresh air purification unit, so that unnecessary waste of electric energy is avoided through exchange of indoor and outdoor energy, and meanwhile, how to effectively control the residual life and the operation condition of a filter assembly of the fresh air purification unit must be focused, which is also a key starting point of the patent, and the intelligent control of the fresh air purification unit and the energy-saving operation of the fresh air purification unit are realized through the control combination of a sensor assembly, the filter assembly, the total heat exchange assembly and a service server.
For the above reasons, the inventor of the present invention has made an intensive study on the existing blower control system, and it is desired to design a new blower control system capable of solving the above problems, i.e., to design a new blower control system to adjust indoor and outdoor ventilation and air exchange, to save energy while satisfying air flow and heat exchange, and to monitor the remaining life and operating condition of the filter assembly.
Disclosure of Invention
In order to overcome the problems, the inventor of the invention makes a keen study and designs a control method of a ceiling type fresh air handling unit, in the method, according to big data simulation of an internet of things mode, according to different combinations of filter specifications, models and performances, residual service life of a filter assembly is prompted by data combination with a sensor assembly; the invention is completed by comprehensively judging whether the fresh air handling unit starts the total heat exchange module and the running state and mode of the fresh air handling unit through the detection of indoor and outdoor environmental factor parameters by combining the sensor assembly and the outdoor atmospheric data published by the country, and effectively controlling the fresh air handling unit to be in an ideal running state while saving energy.
Specifically, the invention aims to provide a control method of a suspended ceiling type fresh air handling unit, which comprises the following steps:
the method comprises the following steps: judging whether the performance of the filter assembly meets the requirement, if so, normally operating the fresh air handling unit, otherwise, pushing the service life abnormal information of the filter assembly at the equipment control end or the mobile phone APP end to prompt a user to replace or maintain;
step two: judging whether the total heat exchange assembly operates, if the indoor and outdoor temperature difference fed back by the sensor assembly reaches a preset value, starting the total heat exchange assembly to supplement indoor and outdoor heat, and avoiding indoor heat leakage in winter and external heat introduction in summer;
step three: judging the running state of the fresh air handling unit, if the equipment is in a manual mode, running the equipment according to the running state set by a user, and still judging the running of the full heat exchange assembly corresponding to the step two by using the actual sensor assembly as a reference; if the equipment is in the operation of intelligent mode, then the running state of equipment is the comprehensive judgement index of each sensor data of sensor assembly, and the sensor kind is not limited to laser PM2.5 sensor, carbon dioxide sensor, temperature and humidity sensor, formaldehyde sensor, ozone sensor, TVOCs sensor etc. combination.
In the first step, the judgment of the residual service life of the filter assembly is calculated by taking the change of the detection data of the quality state of the sucked outdoor air and the quality state of the entered indoor air which are judged by the sensor assembly as a reference and carrying out the calculation by referring to the change of the detection data of the accessories of the outdoor equipment to carry out the calculation of a mathematical model.
Wherein, in the third step: a corresponding numerical value is obtained through the weighted calculation of each sensor assembly, and the numerical value is fed back to the IC end of the equipment and is fed back to the change of the running state of the equipment after being judged, so that the cleanliness index in the intelligent control room is realized, and the aim of saving energy can be fulfilled.
Wherein, suspension type fresh air handling unit's sensor module passes through cell-phone APP end and links to each other with other intelligent clarification plant that set up indoor, gives the air quality information transfer that detects in real time other intelligent clarification plant to make other intelligent clarification plant increase or reduce intelligent clarification plant's operation gear according to the change of room air quality.
And the sensor component transmits the air quality information obtained after the weighting calculation to other intelligent purification equipment.
The invention has the advantages that:
(1) according to the control method of the ceiling type fresh air handling unit, the residual life of the filter assembly of the equipment is comprehensively calculated by calculating the concentration difference between the dust concentration in the indoor air return side detected by the sensor assembly PM2.5 sensor and the average value (in an unconnected state) of the local PM2.5 on the ground year where the equipment is located or the concentration value of the outdoor PM2.5 on the local place where the equipment is located;
(2) according to the control method of the ceiling type fresh air handling unit, the opening and the closing of the total heat exchanger are judged and determined according to the change of the indoor and outdoor temperature difference detected by the sensor assembly, so that the perfect combination of energy conservation and comfort is achieved;
(3) according to the control method of the ceiling type fresh air handling unit, provided by the invention, the running state of the equipment end is judged according to the change condition of indoor and outdoor air quality conditions detected by the sensors in the sensor assembly.
Drawings
Fig. 1 is a flowchart illustrating an overall control method of a ceiling type fresh air handling unit according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view illustrating an overall structure of a ceiling type fresh air handling unit according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view showing the overall structure of a ceiling type fresh air handling unit according to a preferred embodiment of the present invention;
fig. 4 is a schematic view illustrating a structure of a heat wheel exchanger according to a preferred embodiment of the present invention in a ceiling type fresh air handling unit;
FIG. 5 is a graph showing a temperature change throughout the day in Experimental example 2 according to the present invention;
fig. 6 is a graph showing the change in concentration of contaminants in experimental example 3 according to the present invention.
Description of the reference numerals
1-sensor assembly
2-holes
3-baffle plate
4-wheel heat exchanger
Detailed Description
The invention is explained in more detail below with reference to the figures and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to the control method of the ceiling type fresh air handling unit provided by the invention, as shown in fig. 1, the method comprises the following steps:
the method comprises the following steps: judging whether the performance of the filter assembly meets the requirement, if so, normally operating the fresh air handling unit, otherwise, pushing the information of the abnormal residual service life of the filter assembly at the equipment control end or the mobile phone APP end to prompt a user to replace or maintain; the equipment control end includes 86 control box control ends and APP control end, and specific propelling movement mode includes one or more in modes such as buzzer buzzing, pilot lamp scintillation, display screen demonstration text message.
Step two: judging whether the total heat exchange assembly operates, if the indoor and outdoor temperature difference fed back by the sensor assembly reaches a preset value, starting the total heat exchange assembly to supplement indoor and outdoor heat, and avoiding indoor heat leakage in winter and external heat introduction in summer;
step three: judging the running state of the fresh air handling unit, if the equipment is in a manual mode, running the equipment according to the running state set by a user, and still judging the running of the full heat exchange assembly corresponding to the step two by using the actual sensor assembly as a reference; if the equipment is in the operation of intelligent mode, then the running state of equipment is the comprehensive judgement index of each sensor data of sensor assembly, and the sensor kind is not limited to laser PM2.5 sensor, carbon dioxide sensor, temperature and humidity sensor, formaldehyde sensor, ozone sensor, TVOCs sensor etc. combination. As shown in fig. 2 and 3, each sensor in the sensor assembly is integrated, reference numeral 1 in fig. 2 is the sensor assembly, a hole 2 for accommodating the sensor assembly 1 is formed on the ceiling type fresh air machine, a baffle 3 is arranged on the outer side of the sensor assembly 1, and when the sensor assembly 1 is pushed into the hole 2, as shown in fig. 3, only the baffle 3 remains outside the ceiling type fresh air machine.
Preferably, in the step one, the determination of the remaining service life of the filter assembly is calculated by performing the calculation of the mathematical model with reference to the change of the detection data of the outdoor air quality state and the indoor air quality state determined by the sensor assembly, and at the same time, the change of the detection data of the outdoor equipment accessory is referred to.
Preferably, in step three: a corresponding numerical value is obtained through the weighted calculation of each sensor assembly, and the numerical value is fed back to the IC end of the equipment and is fed back to the change of the running state of the equipment after being judged, so that the cleanliness index in the intelligent control room is realized, and the aim of saving energy can be fulfilled. The equipment IC end refers to an operation controller and a 86-box control terminal in the ceiling type fresh air machine;
specifically, the remaining service life of the filter is calculated in the following manner:
taking a high-efficiency air filter as an example for calculation, the theoretical dust holding total life of the filter is related to the unit dust holding amount and the unfolding area of the filter paper, so that the theoretical dust holding amounts corresponding to various filters are different, and the cumulative life of the high-efficiency air filter is assumed to be A (assumed to be 5000 hours);
the total consumption speed of the service life of the filter is related to the change of the CADR value/air quantity and the PM2.5 value corresponding to each gear, and then:
the consumption speed of the filter is CADR value coefficient PM2.5 coefficient;
assume that the device is operating at 160m3At the/h gear, the concentration of the detected indoor PM2.5 is 50 μ g/m3(average value per minute is taken as calculation value, which is convenient for statistical calculation), then according to the CADR value/air volume coefficient set by people as 0.82, the concentration of PM2.5 is 50 mug/m by table look-up3The corresponding coefficients of time are: 0.00366 × PM2.5 value + 0.58; the look-up table is a routine commonly used in the art. The method can avoid complex operation or conversion process, can complete various functions of data compensation, correction, calculation, conversion and the like, and has the advantages of simple program, high execution speed and the like. The look-up table is based on the argument z, looking for y in the table, making y f (x).
Calculation example: the machine runs at 160m3The PM2.5 value of the last second of operation per minute is 0 in the/h gear, and when the engine runs for 1000h,
the residual service life is 5000-0.82 (0.00366 0+0.58) 1000-4521 h,
namely, the remaining service life is the cumulative life-CADR value/air volume coefficient (PM2.5 concentration correspondence coefficient) operating time.
Preferably, the remaining useful life of the filter is displayed in real time.
Operation of the total heat exchange assembly:
sensor module can detect outdoor temperature T simultaneouslyoutTemperature T of indoor air supply outletinTemperature T of indoor return air inletcr，
By calculating | Tout-TcrAbsolute value of and TinThe ratio of the temperature of the air supply outlet is comprehensively calculated to be xi, namely Tin/|Tout-Tcr|＝ξ，
This method calculates | T more than simplyout-TcrThe method of the | difference value is more reasonable, and the scheme fully considers the change conditions of the indoor return air side temperature, the air supply side temperature and the fresh air inlet side temperature.
Examples are: in summer, ToutThe temperature is 36 ℃, the Tin temperature is 25 ℃, the Tcr temperature is 24 ℃, and then the calculated ratio xi is 25/(36-24) is 25/12 which is approximately equal to 2;
in winter ToutAt a temperature of-6 ℃ and TinAt a temperature of 25 ℃ TcrThe temperature is 16 ℃, and then the calculated ratio xi is 25/(16- (-6)) ═ 25/22 ≈ 1;
while in spring and autumn, ToutThe temperature is 12 ℃ and TinThe temperature is 16 ℃ and TcrThe temperature is 14 ℃, and then the calculated ratio xi is 16/(14-12) 16/2 is 8;
when xi is less than 3, the total heat exchange assembly needs to be opened to fully utilize energy and avoid heat loss waste.
Xi in the application indicates a proportional quantity for judging whether to start the total heat exchange assembly, and has no specific physical meaning.
The total heat exchange assembly is shown in fig. 4, and includes a heat wheel; the rotary wheel type heat exchanger is arranged in the shell of the ceiling type fresh air machine,
an air exhaust inlet chamber with an air exhaust inlet and an air exhaust outlet chamber with an air exhaust outlet are arranged in a shell of the ceiling type fresh air fan, and the air exhaust inlet chamber and the air exhaust outlet chamber form an air exhaust channel; for discharging the indoor air to the outside of the room,
a fresh air inlet chamber with a fresh air inlet and a fresh air outlet chamber with a fresh air outlet, wherein the fresh air inlet chamber and the fresh air outlet chamber form a fresh air channel for introducing outdoor air into a room,
the fresh air channel and the air exhaust channel are not communicated with each other in the cavity of the shell;
the rotary wheel type heat exchanger separates an exhaust air inlet cavity from an exhaust air outlet cavity, the exhaust air inlet cavity and the exhaust air outlet cavity are communicated with each other through the rotary wheel type heat exchanger in a fluid mode, the rotary wheel type heat exchanger separates a fresh air inlet cavity from a fresh air outlet cavity, and the fresh air inlet cavity and the fresh air outlet cavity are communicated with each other through the rotary wheel type heat exchanger in a fluid mode; that is, the air discharged from the indoor to the outdoor and passing through the discharge air inlet chamber and the discharge air outlet chamber passes through the heat wheel exchanger, and the air introduced from the outdoor into the indoor and passing through the fresh air inlet chamber and the fresh air outlet chamber also passes through the heat wheel exchanger.
At least one filter assembly is arranged in the fresh air inlet chamber; at least one filter component is also arranged in the fresh air outlet cavity and is used for filtering air entering the room from the outside;
preferably, filters are respectively provided at both ends of the wheel heat exchanger.
The runner type heat exchanger comprises a heat exchange runner, wherein an aluminum alloy spraying material layer is sprayed on the outer surface of the heat exchange runner, and the heat exchange runner can absorb and store heat energy in air; when the outdoor temperature is high and the indoor temperature is low, the heat exchange rotating wheel releases heat in the exhaust side to reduce the temperature of the heat exchange rotating wheel, and when the heat exchange rotating wheel rotates to the fresh air side, the heat from the outdoor in the fresh air side is absorbed again to reduce the temperature of the air from the outdoor; when the outdoor temperature is low and the indoor temperature is high, the heat exchange rotating wheel absorbs heat in the exhaust side, so that the temperature of the heat exchange rotating wheel is increased, and when the heat exchange rotating wheel rotates to the fresh air side, the heat is released to heat the air from the outdoor; the heat exchange rotating wheel is controlled to rotate continuously, so that the temperature of the air entering from the outside is increased or reduced, the indoor temperature is stabilized conveniently, and the energy-saving effect is achieved.
When xi values are different, the working states of the total heat exchange components are also different, and the change is based on Tin/|Tout-TcrThe change in | varies.
In a preferred embodiment, the sensor module of suspension type fresh air handling unit passes through cell-phone APP end and links to each other with the other intelligent clarification plant that set up in indoor, with the air quality information transfer that detects in real time give other intelligent clarification plant to make other intelligent clarification plant increase or reduce intelligent clarification plant's operation gear according to the change of indoor air quality.
The other intelligent purifying devices comprise air purifiers, such as X83 series, X50 series and the like manufactured by Beijing Sanwu two-Ring environmental technologies, Inc.
In a preferred embodiment, the sensor component transmits the air quality information obtained after the weighted calculation to the other intelligent purification devices.
When the new suspended ceiling fan is in an automatic operation state, the operation power of the fan is automatically selected/adjusted according to the weighting calculation result, and the gear is adjusted.
The weighting calculation is reasonable coefficient setting according to the experience effect of various sensor detection values on consumers, so that the sensor display values with good air quality can have difference on the body feeling of the consumers, and corresponding weighting coefficients can be added. The coefficient is between 0 and 1, and for fresh air products, the consumer is in charge of CO2And PM2.5 may be significantly higher than other sensor indicators, where CO may be set2The weighting coefficient of (2) is 0.6, the weighting coefficient of PM2.5 is 0.6 or other data, and then the range value of the final data is calculated in an accumulation validation mode;
for example: the operation mode of the device is determined by calculating the weighted sum of a sensor detection value a sensor weighting factor + B sensor detection value B sensor weighting factor + C sensor detection value C sensor weighting factor + … … + N sensor detection value N sensor weighting factor.
Specifically, sensors that participate in weighting include, but are not limited to, PM2.5 sensors, carbon dioxide sensors, humidity sensors, temperature sensors, formaldehyde sensors, ozone sensors, TVOCs sensors;
the weight coefficient of the PM2.5 sensor is between 0 and 0.6, the weight coefficient of the carbon dioxide sensor is between 0 and 0.6, the weight coefficient of the humidity sensor is between 0 and 1, the weight coefficient of the temperature sensor is between 0 and 2, the weight coefficient of the formaldehyde sensor is between 0 and 0.4, the weight coefficient of the ozone sensor is between 0 and 0.3, and the weight coefficient of the TVOCs sensor is between 0 and 0.4.
And the calculation of the weighted sum is used for judging whether the fresh air volume of the fresh air fan and the heat exchange system are opened or not according to the sum of the weighted data when the equipment runs in the intelligent mode.
Example (c): when the concentration of PM2.5 in the room is 20 mu g/m3，CO2T at a concentration of 1000ppm, a temperature of 25 ℃ and a humidity of 50% RHThe concentration of VOCs is 1250 mu g/m3If the default value of the sensor in the default state is 0 (the value range of the weighting count a is between 320 and 6539), the calculation result of the weighting coefficient a is:
a is 0.6 20+0.6 1000+2 25+1 50+0.4 0+0.3 0+0.4 1250 1212, and the air quality is turbid at this moment through the operation calculation, and the ventilation needs to be increased, so the operation air quantity gear is 140m from the lowest gear3H, adjusted to 180m3The/h gear, until the weighted count A falls to 832 and below, the device again adjusts to lowest gear operation. That is, the ventilation amount in the high gear is executed when the weighting value a is equal to or greater than 832, and the ventilation amount in the low gear is executed when the weighting value a is equal to or less than 832.
Preferably, the ceiling type fresh air machine has at least two working modes, including a manual mode and an intelligent mode;
when carrying out during manual mode, this new fan moves with the running state that the user set for, and at this in-process, the running state that the user probably set for includes the operation gear, operation new trend return air ratio etc. and the mechanism of concrete execution operation includes 86 control box terminals and APP end etc..
And when the intelligent mode is executed, the running state of the equipment is a comprehensive judgment index of data of each sensor of the sensor assembly.
According to the control method of the ceiling type fresh air handling unit provided by the invention, whether the performance of the filter assembly meets the requirements or not is judged in the method, specifically, the remaining service life of the filter assembly is judged in real time, and the remaining service life of the filter assembly is displayed in real time, so that a user can clearly change the filter in time, and the problems of reduction of the filtering effect caused by failure due to expiration of the filter, reduction of indoor air quality, low power consumption of the fresh air handling unit and the like are avoided.
When the residual life of the filter assembly is calculated, the cumulative life-CADR value/air volume coefficient (PM2.5 concentration corresponding coefficient) running time is calculated, wherein the value of the CADR value/air volume coefficient is 0.82, the residual life calculated by the method is more accurate, the waste of residual service time can be avoided, and the problems of indoor air quality reduction, air consumption power of a fresh air fan and the like caused by filtration failure can be prevented;
according to the control method of the ceiling type fresh air handling unit provided by the invention, the outdoor temperature T is detected simultaneouslyoutTemperature T of indoor air supply outletinTemperature T of indoor return air inletcrWhether the total heat exchange component is opened or not is judged, and the temperature T of the indoor air supply outlet is consideredinTherefore, the judgment result is more scientific and reasonable, and the total heat exchange assembly can be started at a more appropriate time.
According to the control method of the ceiling type fresh air handling unit provided by the invention, the corresponding numerical value is obtained through the weighted calculation of each sensor component, the running state of the ceiling type fresh air handling unit is set according to the numerical value, the indoor cleanliness index is intelligently controlled, the energy-saving purpose can be achieved, the condition control is carried out by utilizing the weighted calculation of each sensor component, the method is more scientific and reasonable, and more air indexes are considered under the condition of being emphasized.
Experimental example:
selecting two rooms with the same space volume and the same sealing condition, and arranging the ceiling type fresh air fans with the same type in the two rooms under the conditions of the same indoor environment and the same outdoor environment, wherein the ceiling type fresh air fan in the first room is controlled by the control method of the ceiling type fresh air fan unit provided by the invention, and the ceiling type fresh air fan in the second room is controlled by a control method/system commonly used in the field;
experimental example 1:
the two ceiling type fresh air fans are respectively provided with a filter with the same model size and the same service life, the theoretical accumulated service life of the filter is 5000 hours, and the residual service life of the filter in the first room is calculated according to the control method of the ceiling type fresh air fan unit provided by the invention, namely the residual service life is the accumulated service life-CADR value/air quantity coefficient (PM2.5 concentration corresponding coefficient) running time; the residual service life of the filter in the second room is the difference between the theoretical accumulated life and the actual working time; in the case of a good air quality, i.e. at an average PM2.5 concentration of 10. mu.g/m3The filter still works for 5000 hoursBut has a residual life of 3000+ hours; in the case of poor air quality, i.e. at an average PM2.5 concentration of 100. mu.g/m3When the filter works for about 2600 hours, the service life of the filter is reached, and the filter needs to be replaced;
detecting the filtering capacity of the filter when the remaining life of the filter in the first room is 10 hours, and finding that the filter still has the filtering capacity, and detecting the replaced filter after replacing the filter and finding that the filter has no filtering capacity;
after the filter in room two is replaced, the filter is tested, and it is found that the replaced filter still has filtering capacity in the case of good air quality, and the replaced filter has no filtering capacity in the case of poor air quality.
The experimental example 1 can show that the calculation of the residual life of the filter in the control method of the ceiling type fresh air handling unit provided by the invention is scientific and reasonable, the real and accurate service life can be provided, and the waste and the energy loss are avoided.
Experimental example 2, two ceiling type fresh air fans are in a summer running state, wherein the outdoor temperature in summer is 35 ℃, the indoor temperature is 26 ℃, the outdoor humidity is 65% RH, and the indoor humidity is 50% RH; the winter conditions are similar.
The two ceiling type fresh air fans are provided with full heat exchange components, and the outdoor temperature T is comprehensively considered in the first roomoutTemperature T of indoor air supply outletinTemperature T of indoor return air inletcrTo determine whether to turn on the total heat exchange assembly, i.e. Tin/|Tout-TcrWhen xi is less than 3, the total heat exchange component needs to be opened; in room two according to the outdoor temperature T onlyoutTemperature T of indoor return air inletcrJudging whether to start the total heat exchange assembly, monitoring the average temperature in the first room and the second room in real time, and obtaining a total-day temperature change curve chart shown in fig. 5, wherein the change conditions of the temperature in the first room and the temperature in the second room are given in the graph, and the graph can show that the temperature in the first room is more stable, the temperature fluctuation is smaller, and the temperature fluctuation in the second room is larger; the control provided by the present invention can be illustrated by this experimental exampleThe method can enable the indoor temperature to be more stable, can start the total heat exchange assembly in a more appropriate time, and is better in use experience.
Experimental example 3:
the ceiling type fresh air machine in the first room is controlled by the control method provided by the invention, namely the control is carried out after weighted summation; the ceiling type fresh air machine in the second room is controlled by adopting a traditional control method; on the basis, the pollutant concentrations in the two rooms are monitored in real time to obtain pollutant concentration change curves in the two rooms, as shown in fig. 6, wherein the abscissa represents time, the ordinate represents pollutant concentration, the pollutant concentration is weighted average value of a plurality of pollutants, and no specific unit is provided, so that the pollutant concentrations in the two rooms are compared through the weighted average value; as can be seen from the figure, the pollutant concentration in the first room fluctuates smoothly, the pollutant concentration does not increase in stages, and the total concentration is low; although the pollutant concentration in the room II is lower at some times, the overall concentration fluctuation is larger, the pollutant concentration in a part of time periods is higher, the overall concentration is higher, and the physical condition of a user is unfavorable; the experimental examples can show that the control scheme provided by the invention can control the concentration of indoor pollutants within a certain range to a greater extent under the same power consumption, so as to ensure the health condition of a user.
The present invention has been described above in connection with preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the invention can be subjected to various substitutions and modifications, and the substitutions and the modifications are all within the protection scope of the invention.
Claims (3)
1. A control method of a suspended ceiling type fresh air handling unit is characterized by comprising the following steps:
the method comprises the following steps: judging whether the performance of the filter assembly meets the requirement, if so, normally operating the fresh air handling unit, otherwise, pushing the service life abnormal information of the filter assembly at the equipment control end or the mobile phone APP end to prompt a user to replace or maintain;
step two: judging whether the total heat exchange assembly operates, if the indoor and outdoor temperature difference fed back by the sensor assembly reaches a preset value, starting the total heat exchange assembly to supplement indoor and outdoor heat, and avoiding indoor heat leakage in winter and external heat introduction in summer;
step three: judging the running state of the fresh air handling unit, if the equipment is in a manual mode, running the equipment according to the running state set by a user, and still judging the running of the full heat exchange assembly corresponding to the step two by using the actual sensor assembly as a reference; if the equipment runs in the intelligent mode, the running state of the equipment is a comprehensive judgment index of data of each sensor of the sensor assembly, and the types of the sensors are not limited to the combination of a laser PM2.5 sensor, a carbon dioxide sensor, a temperature and humidity sensor, a formaldehyde sensor, an ozone sensor and a TVOCs sensor;
in the first step, the judgment of the residual service life of the filter assembly is obtained by calculating by taking the change of the detection data of the quality state of the sucked outdoor air and the quality state of the sucked indoor air judged by the sensor assembly as a reference and referring to the change of the detection data of the accessories of the outdoor equipment to carry out mathematical model calculation; judging whether the performance of the filter assembly meets the requirement, specifically judging the residual service life of the filter assembly in real time, and displaying the residual service life of the filter assembly in real time;
the remaining service life is the cumulative life-CADR value/air volume coefficient (PM2.5 concentration corresponding coefficient) operating time;
the sensor assembly can simultaneously detect the outdoor temperature ToutTemperature T of indoor air supply outletinTemperature T of indoor return air inletcr，
By calculating | Tout-TcrAbsolute value of | and indoor air supply outlet temperature TinIs subjected to comprehensive calculation of xi, i.e. Tin/|Tout-Tcr|＝ξ，
Turning on the total heat exchange assembly when xi is less than 3,
in step three: a corresponding numerical value is obtained through the weighted calculation of each sensor assembly and is fed back to the equipment IC end, and the equipment IC end feeds back the change of the running state of the equipment after judgment, so that the indoor cleanliness index is intelligently controlled, and the aim of saving energy can be fulfilled;
the weighting coefficient of the PM2.5 sensor is between 0 and 0.6, the weighting coefficient of the carbon dioxide sensor is between 0 and 0.6, the weighting coefficient of the humidity sensor is between 0 and 1, the weighting coefficient of the temperature sensor is between 0 and 2, the weighting coefficient of the formaldehyde sensor is between 0 and 0.4, the weighting coefficient of the ozone sensor is between 0 and 0.3, and the weighting coefficient of the TVOCs sensor is between 0 and 0.4;
and the calculation of the weighted sum is used for judging whether the fresh air volume of the fresh air fan and the heat exchange system are opened or not according to the sum of the weighted data when the equipment runs in the intelligent mode.
2. The method of controlling a ceiling-mounted fresh air handling unit according to claim 1,
suspension type fresh air handling unit's sensor module passes through cell-phone APP end and links to each other with other intelligent clarification plant that set up in indoor, gives real-time detection's air quality information transfer other intelligent clarification plant to make other intelligent clarification plant increase or reduce intelligent clarification plant's operation gear according to the change of indoor air quality.
3. The control method of the ceiling-mounted fresh air handling unit according to claim 2,
and the sensor component transmits the air quality information obtained after the weighting calculation to other intelligent purification equipment.
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| JP4911255B1 (en) * | 2011-06-30 | 2012-04-04 | パナソニック株式会社 | Air conditioner |
| US9338071B2 (en) * | 2014-10-08 | 2016-05-10 | Google Inc. | Locale profile for a fabric network |
| CN205593115U (en) * | 2016-05-07 | 2016-09-21 | 广州沃森环保产业有限公司 | High -efficient complete hot fresh air purification machine |
| CN205579935U (en) * | 2016-05-08 | 2016-09-14 | 北京世纪佰特节能技术有限公司 | Filter screen for fresh air purification machine of removable filter core |
| CN106091342A (en) * | 2016-08-09 | 2016-11-09 | 爱康森德（深圳）空气技术有限公司 | A kind of air quality processes unit and control method thereof |
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2018
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