CN113251592A - Operation control method of total-heat fresh air machine - Google Patents
Operation control method of total-heat fresh air machine Download PDFInfo
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- CN113251592A CN113251592A CN202010088515.7A CN202010088515A CN113251592A CN 113251592 A CN113251592 A CN 113251592A CN 202010088515 A CN202010088515 A CN 202010088515A CN 113251592 A CN113251592 A CN 113251592A
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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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of full-heat fresh air fans, aims to solve the problems of low working efficiency and high energy consumption of the existing fresh air fan, and provides an operation control method of a full-heat fresh air fan, which comprises the following steps: acquiring an indoor and outdoor temperature difference value and indoor and outdoor air quality parameters; comparing the indoor and outdoor temperature difference value with a preset temperature threshold value; selectively comparing the indoor and outdoor air quality parameters with preset parameters according to the comparison result of the indoor and outdoor temperature difference and the preset temperature threshold; and selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan according to the comparison result of the indoor and outdoor air quality parameters and the preset parameters. The operation control method of the total-heat fresh air fan provided by the invention can select a proper operation mode according to the specific situations of indoor and outdoor environments, thereby improving the working efficiency of the fresh air fan and reducing the energy consumption of the fresh air fan.
Description
Technical Field
The invention relates to the technical field of full-heat fresh air fans, in particular to an operation control method of a full-heat fresh air fan.
Background
Along with the improvement of the living standard of people, the air quality requirement on the indoor environment is higher and higher, and a fresh air fan which can purify outdoor fresh air and then introduce the fresh air into the room to update the indoor air is produced. The types of the commercial fresh air fans are various, and if a fresh air fan which can only realize fresh air introduction exists, the fresh air fan has a simple structure and a single function; the full-heat fresh air machine capable of performing full-heat exchange with indoor return air is arranged, and the fresh air machine can recover heat in indoor air and avoid the rapid change of indoor temperature.
Although the existing full-heat fresh air fan can realize heat recovery, the existing full-heat fresh air fan cannot adjust the adaptability of the operation mode based on the specific situations of indoor and outdoor environments, so that the problems of low working efficiency and high energy consumption are caused, and the user experience is reduced.
Accordingly, there is a need in the art for a new method for controlling the operation of a full-hot fresh air machine to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problems of low working efficiency and high energy consumption of the existing fresh air machine, the present invention provides an operation control method of a full-heat fresh air machine, which is characterized in that the full-heat fresh air machine comprises: the fresh air duct is communicated with the outdoor air inlet and the indoor air outlet; the air return duct is communicated with the indoor air inlet and the outdoor air outlet, a first air door is arranged in the air return duct, and the first air door is used for switching on or switching off the air return duct; the total heat exchange core comprises a fresh air channel and a return air channel which can exchange heat, the fresh air channel is arranged in the fresh air channel or forms a part of the fresh air channel, and the return air channel is arranged in the return air channel or forms a part of the return air channel so as to realize total heat exchange between fresh air and return air; the bypass air duct is communicated with the indoor air inlet and the outdoor air outlet, a second air door used for switching on or off the bypass air duct is arranged in the bypass air duct, and the bypass air duct is arranged at the periphery of the total heat exchange core; the first fan is arranged at the outdoor air outlet to drive the air flow in the return air duct to circulate; a second fan arranged at the indoor air outlet to drive the air flow in the fresh air duct to circulate,
the operation control method comprises the following steps:
acquiring an indoor and outdoor temperature difference value and indoor and outdoor air quality parameters;
comparing the indoor and outdoor temperature difference value with a preset temperature threshold value;
selectively comparing the indoor and outdoor air quality parameters with preset parameters according to the comparison result of the indoor and outdoor temperature difference values and the preset temperature threshold value;
selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan according to the comparison result of the indoor and outdoor air quality parameters and the preset parameters.
In the preferable technical scheme of the operation control method of the total heat fresh air fan, the indoor and outdoor air quality parameters comprise indoor air quality parameters and outdoor air quality parameters, the preset parameters comprise preset indoor parameters and preset outdoor parameters,
the step of "selectively comparing the indoor and outdoor air quality parameters with preset parameters" specifically includes:
if the indoor and outdoor temperature difference is higher than the preset temperature threshold value, comparing the indoor air quality parameter with the preset indoor parameter; and/or
And if the indoor and outdoor temperature difference is lower than the preset temperature threshold, comparing the outdoor air quality parameter with the preset outdoor parameter.
In a preferable technical scheme of the operation control method of the total-heat fresh air fan, the indoor air quality parameters comprise indoor CO2 concentration, indoor PM2.5 concentration and indoor formaldehyde concentration; the outdoor air quality parameters include outdoor CO2 concentration and outdoor PM2.5 concentration.
In a preferred embodiment of the operation control method of the total-heat fresh air machine, the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if at least one of the indoor air quality parameters is higher than the preset indoor parameters, the first air door is opened, the second air door is closed, and the first fan and the second fan are enabled to run at the same rotating speed, so that the new fan runs in a full-heat mode.
In a preferred embodiment of the operation control method of the total-heat fresh air machine, the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, the first air door is opened, the second air door is closed, and the rotating speed of the first fan is lower than that of the second fan, so that the new fan operates in a micro-positive pressure mode.
In a preferred embodiment of the operation control method of the total-heat fresh air machine, the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if all the outdoor air quality parameters are higher than the preset outdoor parameters, the first air door and the second air door are closed at the same time, the first fan is closed, and the second fan is opened, so that the new fan operates in an inner circulation mode.
In a preferred embodiment of the operation control method of the total-heat fresh air machine, the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if at least one of the outdoor air quality parameters is lower than the preset outdoor parameters, closing the first air door, opening the second air door, and enabling the first fan and the second fan to run at the same or different rotating speeds, so that the new fan runs in a bypass mode.
In a preferred embodiment of the operation control method of the total-heat fresh air machine, the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, the first air door is opened, the second air door is closed, the first fan is closed, and the second fan is opened, so that the new fan runs in a new air mode.
In a preferred technical solution of the operation control method of the total-heat fresh air machine, the fresh air machine further includes an air quality detection device and a temperature detection device, and the step of "acquiring an indoor and outdoor temperature difference and an indoor and outdoor air quality parameter" specifically includes:
and acquiring indoor and outdoor air quality parameters measured by the air quality detection device and an indoor and outdoor temperature difference measured by the temperature detection device.
In a preferable technical scheme of the operation control method of the total-heat fresh air fan, the indoor and outdoor temperature difference is a temperature difference with a change rate lower than 10% within a set time.
According to the total-heat fresh air fan provided by the invention, the bypass air channel is arranged at the periphery of the total-heat exchange core, the first air door is arranged in the return air channel, the second air door is arranged in the bypass air channel, and the air channels are switched by means of opening and closing of the first air door and the second air door, so that the flow direction of return air can be accurately controlled, mutual interference among the air channels is avoided, the phenomenon of return air shunting is avoided, and the control precision of the fresh air fan under different operation modes can be improved. According to the operation control method based on the structure execution of the total-heat fresh air fan, whether the fresh air fan needs total heat exchange is judged by comparing the indoor and outdoor temperature difference value with the preset temperature threshold value, so that the initial selection of the operation mode is realized, then the comparison mode of the indoor and outdoor air quality parameters and the preset parameters is selected based on the initial selection result, and the initially selected operation mode is further accurately selected, so that the proper operation mode can be selected according to the specific situation of the indoor and outdoor environment, the working efficiency of the fresh air fan is improved, the comfortable indoor environment can be quickly created for a user, the problem of high energy consumption caused by the fact that the existing fresh air fan runs away from the actual environment condition is solved, and further the user experience is effectively improved.
Furthermore, when the indoor and outdoor temperature difference value is higher than a preset temperature threshold value, the total heat exchange of fresh air and return air can be firstly determined to be required, the initial selection of the operation mode is realized, and then the indoor air quality parameter is compared with the preset indoor parameter through selection to determine the path through which the return air needs to circulate, so that the final selection of the operation mode is realized, the purpose of accurately selecting the operation mode of the fresh air fan based on the specific situation of the indoor and outdoor environment is realized, the working efficiency of the fresh air fan is improved, and the energy consumption of the fresh air fan is reduced. When the indoor and outdoor temperature difference value is lower than the preset temperature threshold value, the fresh air and the return air can be firstly determined to be not required to be subjected to total heat exchange, the return air can be determined not to pass through a return air duct, so that the initial selection of the operation mode is realized, the outdoor air quality parameter is compared with the preset outdoor parameter to evaluate the outdoor air quality, the path through which the fresh air needs to circulate is further determined, the final selection of the operation mode is realized, and the purpose of accurately selecting the fresh air fan operation mode based on the specific situation of the indoor and outdoor environment is further realized.
Furthermore, when at least one of the indoor air quality parameters is higher than the preset indoor parameters, the full-heat mode is selected, namely, the full-heat mode is operated by opening the first air door, closing the second air door and enabling the first fan and the second fan to operate at the same rotating speed, so that the influence of outdoor fresh air on the indoor temperature can be reduced by fully utilizing the heat energy in return air, and unnecessary energy consumption is avoided.
Furthermore, when all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, the micro-positive pressure mode is selected, the influence of outdoor fresh air on the indoor temperature is reduced, meanwhile, dust, impurities and the like in the outdoor air can be further prevented from entering the room, and the air purification cost is reduced.
Furthermore, when all the outdoor air quality parameters are higher than the preset outdoor parameters, the internal circulation mode is selected, so that the working load of the fresh air fan can be reduced, the energy consumption is saved, and the service life of the total heat exchange core is prolonged.
Furthermore, when at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, the bypass mode is selected, and unnecessary treatment on the return air can be avoided under the condition that heat exchange between fresh air and the return air is not needed, so that the wind resistance in the return air discharging process can be reduced, and the return air discharging efficiency is improved; in addition, the first air door is closed to cut off the return air duct, so that partial return air can be prevented from being shunted to the return air duct before being introduced into the bypass air duct, and the accurate control of the fresh air fan is realized.
Further, select the new trend mode when at least one in the outdoor air quality parameter is less than predetermineeing outdoor parameter, both can reduce the new trend and purify the cost, can cause the discharge of pressure-fired state in order to realize the return air with the help of windows etc. again with indoor operation, avoid opening first fan and drive the return air and discharge to can reduce the energy consumption of new fan.
Furthermore, by means of the external air quality detection device and the external temperature detection device, the detection precision of data can be improved, and the accurate judgment of the running mode of the fresh air machine is facilitated.
Furthermore, by selecting the temperature difference value with the change rate lower than 10% in the set time as the data for comparison with the preset temperature threshold, the selection of the operation mode under the condition of large change of the indoor and outdoor temperature difference values can be avoided, so that the misjudgment rate is reduced, and the new fan is realized.
Drawings
The full-heat fresh air machine and the operation control method thereof of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the external structure of a total heat fresh air machine according to the present invention;
FIG. 2 is a schematic view of the internal structure of the total heat fresh air machine of the present invention;
FIG. 3 is a schematic structural diagram of a framework of the total heat fresh air machine of the present invention;
FIG. 4 is a schematic sectional view taken along line A-A of FIG. 3;
FIG. 5 is a logic block diagram of the method for controlling the operation of a full-hot fresh air machine according to the present invention;
FIG. 6 is a schematic flow chart illustrating a method for controlling the operation of a total heat fresh air machine according to the present invention;
FIG. 7 is a schematic view of the flow conditions of the total heat fresh air machine of the present invention in the total heat mode;
FIG. 8 is a schematic view of the air flow state of the full-heat fresh air fan of the present invention in the bypass mode;
FIG. 9 is a schematic view of the flow conditions of the total heat fresh air machine of the present invention in the internal circulation mode;
FIG. 10 is a schematic view of the airflow state of the total heat fresh air machine of the present invention in the fresh air mode;
FIG. 11 is a view showing the air flow state of the total heat fresh air machine of the present invention in the air exhaust mode;
list of reference numerals:
1. a full-hot fresh air fan; 11. a top cover; 12. a framework; 121. an outdoor air inlet; 122. an outdoor air outlet; 123. an indoor air inlet; 124. an indoor air outlet; 125. a full heat exchange core mounting position; 1251. an air return outlet; 1252. a fresh air inlet; 1253. a fresh air outlet; 1254. an air return inlet; 126. a bypass air duct; 127. an upper layer channel; 128. a lower layer channel; 13. a base plate; 14. a purification module; 141. a first filter screen; 142. a second filter screen; 143. a third filter screen; 144. a formaldehyde removal module; 145. a fourth filter screen; 146. a sterilization module; 15. a full heat exchange core; 16. a fan; 161. a first fan; 162. a second fan; 17. a third damper; 18. a first damper; 19. a second damper.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, the heat exchange principle of the total heat exchange core and its internal structure, which are well known to those skilled in the art, are not described in detail in order to highlight the gist of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Based on the problems of low working efficiency and high energy consumption of the existing fresh air machine pointed out by the background art, the invention provides an operation control method of a full-heat fresh air machine, aiming at selecting a proper operation mode based on the specific situations of indoor and outdoor environments so as to improve the working efficiency of the fresh air machine and reduce the energy consumption of the fresh air machine, thereby improving the user experience.
Referring to fig. 1 to 11, fig. 1 is an external structural view of a total heat fresh air machine according to the present invention; FIG. 2 is a schematic view of the internal structure of the total heat fresh air machine of the present invention; FIG. 3 is a schematic structural diagram of a framework of the total heat fresh air machine of the present invention; FIG. 4 is a schematic sectional view taken along line A-A of FIG. 3; FIG. 5 is a logic block diagram of the method for controlling the operation of a full-hot fresh air machine according to the present invention; FIG. 6 is a schematic flow chart illustrating a method for controlling the operation of a total heat fresh air machine according to the present invention; FIG. 7 is a schematic view of the flow conditions of the total heat fresh air machine of the present invention in the total heat mode; FIG. 8 is a schematic view of the air flow state of the full-heat fresh air fan of the present invention in the bypass mode; FIG. 9 is a schematic view of the flow conditions of the total heat fresh air machine of the present invention in the internal circulation mode; FIG. 10 is a schematic view of the airflow state of the total heat fresh air machine of the present invention in the fresh air mode; fig. 11 is an air flow state diagram of the total heat fresh air machine of the present invention in the air exhaust mode.
The structure of the total heat fresh air machine in the present invention will be described in detail with reference to fig. 1 to 4.
Referring first to fig. 1-3, the total heat fresh air machine 1 provided by the invention comprises a basic structure formed by a top cover 11, a framework 12, a bottom plate 13 and the like, wherein the top plate is connected to the top surface of the framework 12, the bottom plate 13 is connected to the bottom surface of the framework 12, bolt seat holes are formed in the bottom plate 13 so as to facilitate the installation of the fresh air machine, and the bottom plate 13 of the fresh air machine faces to-be-installed surfaces such as the indoor top wall or side wall during the installation. The inside of the total heat fresh air fan 1 is provided with a fresh air duct and a return air duct, and is provided with a fan 16, a total heat exchange core 15, a purification module 14 and the like. The fresh air duct is communicated with the outdoor air inlet 121 and the indoor air outlet 124 and is used for sending outdoor fresh air into the room; the return air duct communicates with the indoor air inlet 123 and the outdoor air outlet 122, and is used for discharging indoor return air to the outside. Referring to fig. 2, the fan 16 in this embodiment includes a first fan 161 and a second fan 162, the first fan 161 is disposed at the outdoor air outlet 122 to drive the airflow in the return air duct to circulate, the second fan 162 is disposed at the indoor air outlet 124 to drive the airflow in the fresh air duct to circulate, and the rotation speeds of the first fan 161 and the second fan 162 are adjustable.
The total heat exchange core 15 is used for realizing the heat exchange of fresh air and return air. There are many configurations of the total heat exchange core 15, most commonly in both cross-flow and cross-counterflow configurations, and the desired channel configuration can be constructed by combining multiple heat exchange cores. Since the structure and the operation principle of the total heat exchange core 15 are already the mature prior art, the internal structure and the operation principle of the total heat exchange core 15 will not be described in detail in this embodiment. The total heat exchange core 15 adopted in the present embodiment is a cross-counterflow total heat exchange core 15, and referring to fig. 1 and 3, the cross-section of the cross-counterflow total heat exchange core 15 is a regular hexagon and is mounted on the total heat exchange core mounting position 125 formed on the frame 12. A fresh air channel and a return air channel are formed inside the total heat exchange core 15, the fresh air channel is arranged in the fresh air channel or forms a part of the fresh air channel, and the return air channel is arranged in the return air channel or forms a part of the return air channel. For convenience of description, in this embodiment, the fresh air inlet and the fresh air outlet formed in the fresh air channel and the fresh air inlet 1252 and the fresh air outlet 1253 formed in the installation position 125 of the total heat exchange core are referred to as a fresh air inlet 1252 and a fresh air outlet 1253, and the return air inlet and the return air outlet formed in the return air channel and the return air inlet 1254 and the return air outlet 1251 formed in the installation position 125 of the total heat exchange core are referred to as a return air inlet 1254 and a return air outlet 1251.
The purification module 14 is used for purifying fresh air and return air. With reference to fig. 1-3, the purification module 14 in this embodiment includes a first purification module and a second purification module, the first purification module includes a first filter 141 and a second filter 142 disposed upstream of the fresh air duct, and a formaldehyde removing module 144, a fourth filter 145 and a bacteria removing module disposed downstream of the fresh air duct, and the second purification module includes a third filter 143 disposed upstream of the return air duct.
Referring to fig. 3, the ventilation path of the fresh air duct is: outdoor fresh air enters the upstream of the fresh air duct from the outdoor air inlet 121, is primarily filtered by the first filter screen 141 and the second filter screen 142, enters the fresh air channel of the total heat exchange core 15 from the fresh air inlet 1252, enters the upper channel 127 from the fresh air outlet 1253, is further purified in the upper channel 127 by the formaldehyde removal module 144 and the fourth filter screen 145, and then enters the indoor space from the indoor air outlet 124 after being sterilized by the sterilization module 146. The ventilation path of the return air duct is as follows: indoor return air enters the upstream of the return air duct from the indoor air inlet 123, then enters the lower-layer channel 128, is filtered by the third filter screen 143 arranged at the return air inlet 1254, then enters the downstream of the return air duct through the return air outlet 1251, and finally is discharged to the outdoor through the outdoor air outlet 122. Referring to fig. 4, a first damper 18 is disposed in the lower duct 128 in the return air duct, the first damper 18 being used to open or close the return air duct.
The total-heat fresh air blower 1 is further provided with a bypass air duct 126, and the bypass air duct 126 is communicated with the indoor air inlet 123 and the outdoor air outlet 122. Referring to fig. 4, a second damper 19 for opening or closing the bypass air duct 126 is provided in the bypass air duct 126, and the bypass air duct 126 is provided at the periphery of the total heat exchange core 15. It should be noted that the "periphery" in the present invention means that the bypass air duct 126 is disposed outside the diathermic core 15 in the top view of fig. 3.
In the invention, the air entering through the outdoor air inlet 121 is called fresh air, and the air entering through the indoor air inlet 123 is called return air.
The operation control method of the total heat fresh air machine provided by the invention is described in detail with reference to fig. 5-11.
Referring to fig. 5, the operation control method of the total heat fresh air machine provided by the invention comprises the following steps:
and S10, acquiring the indoor and outdoor temperature difference and the indoor and outdoor air quality parameters. Specifically, the fresh air fan comprises an air quality detection device and a temperature detection device, the air quality detection device can be external or internal, and preferably an external air quality detection device is adopted, for example, a special air quality detection device is electrically or communicatively connected to a control panel of the fresh air fan to obtain indoor and outdoor air quality parameters measured by the air quality detection device. Similarly, the temperature detection device may be a built-in or external device, preferably a built-in device, and the indoor and outdoor temperature difference obtained in this embodiment is the indoor and outdoor temperature difference measured by the temperature detection device. When the indoor and outdoor temperature difference values are obtained, the obtained data can be fed back to the full-heat fresh air machine only when the change rate of the indoor and outdoor temperature difference values in the set time is lower than 10%, for example, the temperature difference values can be fed back to the fresh air machine when the change rate of the temperature difference values obtained in 10 minutes is not more than 10%, so that the fresh air machine can select a proper operation mode based on a stable operation environment, and the realization of accurate control of the fresh air machine is facilitated.
And S20, comparing the indoor and outdoor temperature difference value with a preset temperature threshold value. In particular, the preset temperature threshold may be experimentally determined during the experimental phase, for example set to 3 ℃ or other suitable temperature values. The preset temperature threshold value can be determined by comparing the heat exchange cost of the fresh air and the return air with the cost of heating or cooling the indoor air, and the setting is completed in the experimental stage.
And S30, selectively comparing the indoor and outdoor air quality parameters with preset parameters according to the comparison result of the indoor and outdoor temperature difference and the preset temperature threshold. Specifically, the indoor and outdoor air quality parameters include an indoor air quality parameter and an outdoor air quality parameter, and the preset parameters include a preset indoor parameter and a preset outdoor parameter. The indoor air quality parameters comprise indoor CO2 concentration, indoor PM2.5 concentration and indoor formaldehyde concentration; the outdoor air quality parameters include outdoor CO2 concentration and outdoor PM2.5 concentration; the preset indoor parameters comprise the concentration of CO2 in the preset room, the concentration of PM2.5 in the preset room and the concentration of formaldehyde in the preset room; the preset outdoor parameters comprise a preset outdoor CO2 concentration and a preset outdoor PM2.5 concentration. The specific parameter settings may be determined according to industry standards or experimental determinations.
The comparison result of the indoor and outdoor temperature difference value and the preset temperature threshold value has two types: the indoor and outdoor temperature difference is higher than the preset temperature threshold, or if the indoor and outdoor temperature difference is lower than the preset temperature threshold. If indoor outer temperature difference is higher than predetermineeing the temperature threshold value, then indicate to need carry out the heat exchange with new trend and return air in order to retrieve the heat in the return air, reduce the influence degree of new trend to indoor temperature, new trend and return air all need pass through total heat exchange core 15 promptly to can tentatively confirm need operating pressure-fired mode or total heat mode under this kind of situation, then the accessible is compared indoor air quality parameter and predetermineeing indoor parameter and is come final definite pressure-fired mode or select total heat mode. If the indoor and outdoor temperature difference is lower than the preset temperature threshold value, the fact that the indoor temperature cannot be greatly influenced even if the heat in the return air is not recovered by the fresh air is shown, the return air does not need to pass through the total heat exchange core 15 under the condition, the return air channel can be disconnected in the operation process of the fresh air fan, and the operation mode of the fresh air fan can be finally determined by comparing the outdoor air quality parameter with the preset outdoor parameter.
And S40, selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan according to the comparison result of the indoor and outdoor air quality parameters and the preset parameters.
Specifically, referring to fig. 6 and 7, if at least one of the indoor air quality parameters is higher than a preset indoor parameter, the new fan is controlled to perform the following operations: the first damper 18 is opened to turn on the return air duct, the second damper 19 is closed to turn off the bypass air duct 126, and the first fan 161 and the second fan 162 are operated at the same rotation speed, so that the new fan operates in the full heat mode, and the air flow path is shown with reference to fig. 7.
If all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, controlling the fresh air fan to perform the following operations: the first damper 18 is opened to connect the return air duct, the second damper 19 is closed to disconnect the bypass air duct 126, and the rotation speed of the first fan 161 is lower than that of the second fan 162, so that the fresh air and the return air have a certain speed difference, thereby operating the fresh air fan in the micro-positive pressure mode. Under the pressure-fired mode, can avoid the dust etc. in the outdoor air to get into indoor through the window. The opening and closing of the damper in the micro-positive pressure mode is the same as in the full heat mode, except for the rotational speed of the fan, so the airflow path can also be seen with reference to fig. 7.
If all the parameters in the outdoor air quality parameters are higher than the preset outdoor parameters, the cost for purifying the fresh air is higher, and at the moment, the fresh air machine can be controlled to perform the following operations: meanwhile, the first air door 18 and the second air door 19 are closed, the first fan 161 is closed, the second fan 162 is opened, and the third air door 17 is opened, so that the indoor return air enters the upper air duct from the indoor air inlet 123 and is discharged through the indoor air outlet 124, and the new fan operates in an internal circulation mode, and self-purification of the indoor air is realized through the third filter screen 143 and the formaldehyde removal module 144, wherein the air flow path is shown in fig. 9. It should be noted that the third damper 17 is closed in the other operation modes than the internal circulation operation mode. Referring to fig. 3, the third damper 17 includes a door frame and a door panel, and when the door panel is in the P working position, the third damper 17 is closed, and when the door panel is in the Q working position, the third damper 17 is opened, and the door panel is driven by a micro motor.
If at least one among the outdoor air quality parameter is less than predetermineeing outdoor parameter, the cost that the new trend purified is lower relatively, can introduce the new trend this moment, then can directly discharge or do not do the processing of return air and do not handle it and discharge through the window, because the introduction new trend makes indoor atmospheric pressure change very fast, preferredly discharges indoor return air through new fan, can control new fan this moment and carry out the following operation: the first damper 18 is closed to disconnect the return air duct, the second damper 19 is opened to open the bypass air duct 126, and the first fan 161 and the second fan 162 are operated at the same or different speeds, thereby operating the new fan in the bypass mode. In the bypass mode, the first air door 18 is closed, so that the return air can not be shunted into the return air duct and can completely enter the bypass air duct 126, and the control precision of the fresh air machine can be improved. The airflow path in the bypass mode is shown with reference to fig. 8.
Alternatively, if in order to reduce the energy consumption of the fresh air fan, in the case that at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, the return air may not be processed, and after the fresh air is introduced, the indoor air is in a micro-positive pressure state, which may promote the indoor air to be discharged from the window, the door gap, and the like, at this time, the fresh air fan may be controlled to perform the following operations: the first damper 18 is opened and the second damper 19 is closed, and the first fan 161 is closed and the second fan 162 is opened, thereby operating the new fan in the new air mode. Alternatively, the first damper 18 may be closed, the second damper 19 may be closed, the first fan 161 may be closed, and the second fan 162 may be opened to operate the fresh air fan in the fresh air mode, where the airflow state is shown in fig. 10.
The total-heat fresh air fan 1 of the present invention can also operate in an air exhausting mode, and when the indoor air quality is poor and needs to be exhausted quickly, the air exhausting mode can operate, in which the first air door 18 is closed and the second air door 19 is opened, the first air fan 161 is opened and the second air fan 162 is closed, only the bypass air duct 126 is communicated to promote the return air to be exhausted quickly, because the application scenes of this mode are few, the mode can be executed by the manual selection of the user, and the air flow state of the air exhausting mode is shown in fig. 11.
In fig. 7 to 11, black solid arrows indicate indoor return air, and open arrows indicate outdoor fresh air.
According to the total-heat fresh air fan provided by the invention, the bypass air channel is arranged at the periphery of the total-heat exchange core, the first air door is arranged in the return air channel, the second air door is arranged in the bypass air channel, and the air channels are switched by means of opening and closing of the first air door and the second air door, so that the flow direction of return air can be accurately controlled, mutual interference among the air channels is avoided, the phenomenon of return air shunting is avoided, and the control precision of the fresh air fan under different operation modes can be improved. According to the operation control method based on the structure execution of the total-heat fresh air fan, whether the fresh air fan needs total heat exchange is judged by comparing the indoor and outdoor temperature difference value with the preset temperature threshold value, so that the initial selection of the operation mode is realized, then the comparison mode of the indoor and outdoor air quality parameters and the preset parameters is selected based on the initial selection result, and the initially selected operation mode is further accurately selected, so that the proper operation mode can be selected according to the specific situation of the indoor and outdoor environment, the working efficiency of the fresh air fan is improved, the comfortable indoor environment can be quickly created for a user, the problem of high energy consumption caused by the fact that the existing fresh air fan runs away from the actual environment condition is solved, and further the user experience is effectively improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. An operation control method of a full-hot fresh air fan is characterized in that the full-hot fresh air fan comprises the following steps: the fresh air duct is communicated with the outdoor air inlet and the indoor air outlet; the air return duct is communicated with the indoor air inlet and the outdoor air outlet, a first air door is arranged in the air return duct, and the first air door is used for switching on or switching off the air return duct; the total heat exchange core comprises a fresh air channel and a return air channel which can exchange heat, the fresh air channel is arranged in the fresh air channel or forms a part of the fresh air channel, and the return air channel is arranged in the return air channel or forms a part of the return air channel so as to realize total heat exchange between fresh air and return air; the bypass air duct is communicated with the indoor air inlet and the outdoor air outlet, a second air door used for switching on or off the bypass air duct is arranged in the bypass air duct, and the bypass air duct is arranged at the periphery of the total heat exchange core; the first fan is arranged at the outdoor air outlet to drive the air flow in the return air duct to circulate; a second fan arranged at the indoor air outlet to drive the air flow in the fresh air duct to circulate,
the operation control method comprises the following steps:
acquiring an indoor and outdoor temperature difference value and indoor and outdoor air quality parameters;
comparing the indoor and outdoor temperature difference value with a preset temperature threshold value;
selectively comparing the indoor and outdoor air quality parameters with preset parameters according to the comparison result of the indoor and outdoor temperature difference values and the preset temperature threshold value;
selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan according to the comparison result of the indoor and outdoor air quality parameters and the preset parameters.
2. The operation control method of a total heat fresh air machine according to claim 1, wherein the indoor and outdoor air quality parameters include an indoor air quality parameter and an outdoor air quality parameter, the preset parameters include a preset indoor parameter and a preset outdoor parameter,
the step of "selectively comparing the indoor and outdoor air quality parameters with preset parameters" specifically includes:
if the indoor and outdoor temperature difference is higher than the preset temperature threshold value, comparing the indoor air quality parameter with the preset indoor parameter; and/or
And if the indoor and outdoor temperature difference is lower than the preset temperature threshold, comparing the outdoor air quality parameter with the preset outdoor parameter.
3. The method of claim 2, wherein the indoor air quality parameter comprises indoor CO2Concentration, indoor PM2.5 concentration and indoor formaldehyde concentration; the outdoor air quality parameter comprises outdoor CO2Concentration and outdoor PM2.5 concentration.
4. The operation control method of the total-heat fresh air machine according to claim 3, wherein the step of selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan specifically comprises:
if at least one of the indoor air quality parameters is higher than the preset indoor parameters, the first air door is opened, the second air door is closed, and the first fan and the second fan are enabled to run at the same rotating speed, so that the new fan runs in a full-heat mode.
5. The operation control method of the total-heat fresh air machine according to claim 3 or 4, wherein the step of selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan specifically comprises:
if all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, the first air door is opened, the second air door is closed, and the rotating speed of the first fan is lower than that of the second fan, so that the new fan operates in a micro-positive pressure mode.
6. The operation control method of the total-heat fresh air machine according to any one of claims 3 to 5, wherein the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if all the outdoor air quality parameters are higher than the preset outdoor parameters, the first air door and the second air door are closed at the same time, the first fan is closed, and the second fan is opened, so that the new fan operates in an inner circulation mode.
7. The operation control method of the total-heat fresh air machine according to any one of claims 3 to 6, wherein the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if at least one of the outdoor air quality parameters is lower than the preset outdoor parameters, closing the first air door, opening the second air door, and enabling the first fan and the second fan to run at the same or different rotating speeds, so that the new fan runs in a bypass mode.
8. The operation control method of the total-heat fresh air machine according to any one of claims 3 to 6, wherein the step of "selectively opening or closing the first damper and/or the second damper and the first fan and/or the second fan" specifically includes:
if at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, the first air door is opened, the second air door is closed, the first fan is closed, and the second fan is opened, so that the new fan runs in a new air mode.
9. The operation control method of the total-heat fresh air fan according to any one of claims 1 to 8, wherein the fresh air fan further comprises an air quality detection device and a temperature detection device, and the step of "acquiring the indoor and outdoor temperature difference and the indoor and outdoor air quality parameters" specifically comprises:
and acquiring indoor and outdoor air quality parameters measured by the air quality detection device and an indoor and outdoor temperature difference measured by the temperature detection device.
10. The operation control method of the total heat fresh air machine according to claim 9, wherein the indoor and outdoor temperature difference is a temperature difference in which a change rate is less than 10% within a set time.
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| CN202010088515.7A CN113251592A (en) | 2020-02-12 | 2020-02-12 | Operation control method of total-heat fresh air machine |
| PCT/CN2021/072822 WO2021159933A1 (en) | 2020-02-12 | 2021-01-20 | Operation control method for total-heat fresh air ventilator |
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| CN114110785B (en) * | 2021-11-23 | 2023-01-06 | 珠海格力电器股份有限公司 | Heat exchange air port structure, control method thereof and air conditioner |
| CN114234373B (en) * | 2021-12-16 | 2022-12-13 | 珠海格力电器股份有限公司 | Control method and device of fresh air environmental control unit and fresh air environmental control unit |
| CN114623509A (en) * | 2022-03-15 | 2022-06-14 | 青岛海信日立空调系统有限公司 | Photovoltaic new trend dehumidification all-in-one |
| KR20240010936A (en) | 2022-07-18 | 2024-01-25 | 엘지전자 주식회사 | Ventilation apparatus |
| KR20240010933A (en) | 2022-07-18 | 2024-01-25 | 엘지전자 주식회사 | Ventilation apparatus |
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Application publication date: 20210813 |