CN112413736B - Fresh air conditioner indoor unit, fresh air conditioner and control method of fresh air conditioner - Google Patents
Fresh air conditioner indoor unit, fresh air conditioner and control method of fresh air conditioner Download PDFInfo
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- CN112413736B CN112413736B CN202011238543.9A CN202011238543A CN112413736B CN 112413736 B CN112413736 B CN 112413736B CN 202011238543 A CN202011238543 A CN 202011238543A CN 112413736 B CN112413736 B CN 112413736B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 43
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 15
- 239000001569 carbon dioxide Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012886 linear function Methods 0.000 description 2
- 238000011328 necessary treatment Methods 0.000 description 2
- 241000255925 Diptera Species 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
- F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/70—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a fresh air conditioner indoor unit, a fresh air conditioner and a control method thereof, wherein the fresh air conditioner indoor unit comprises a shell, a fresh air inlet, a fresh air outlet, a first return air inlet, a second return air inlet and a return air outlet are formed on the shell, a heat exchange core body is arranged in the shell, a first flow channel and a second flow channel which are mutually crossed and independent are formed on the heat exchange core body, the fresh air inlet, the first flow channel and the fresh air outlet are communicated to form a fresh air flow channel, the first return air inlet, the second flow channel and the return air outlet are communicated to form a return air discharge flow channel, an air valve is arranged in the fresh air flow channel between the first flow channel and the fresh air outlet, and the air valve is provided with a first position for communicating the second return air inlet and the fresh air outlet and a second position for communicating the first flow channel and the fresh air outlet. According to the invention, the flow channel switching between the fresh air mode and the return air mode is realized through the single air valve, the structure of the indoor unit is simplified, and the manufacturing cost of the air conditioner is reduced.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a fresh air conditioner indoor unit, a fresh air conditioner and a control method of the fresh air conditioner indoor unit.
Background
With the increasing improvement of the living standard of people, the living quality also becomes a hot spot pursued by the public. But now air quality worsens constantly, and closes the door and window operation air conditioner for a long time and make the indoor air quality problem that indoor carbon dioxide concentration is higher partially worsen, leads to indoor comfort to reduce, easily makes people appear bad symptoms such as nausea, dizziness, lassitude. In order to solve the problem of indoor air and improve the quality of home life, the fresh air conditioner is also produced. The appearance of the fresh air conditioner solves the problem of indoor air quality of a closed space, but also has the problems that fresh air quantity is difficult to accurately convey, energy consumption is increased and the like.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide an indoor unit of a fresh air conditioner, the fresh air conditioner and a control method thereof, wherein the flow channel switching between the fresh air mode and the return air mode is realized through a single air valve, so that the structure of the indoor unit is simplified, and the manufacturing cost of the air conditioner is reduced.
In order to solve the above problems, the present invention provides a fresh air conditioner indoor unit, which comprises a casing, wherein the casing is provided with a fresh air inlet, a fresh air outlet, a first return air inlet, a second return air inlet and a return air outlet, a heat exchange core is arranged in the casing, the heat exchange core is provided with a first flow channel and a second flow channel which are mutually crossed and form independent, the fresh air inlet, the first flow channel and the fresh air outlet are communicated to form a fresh air flow channel, the first return air inlet, the second flow channel and the return air outlet are communicated to form a return air discharge flow channel, an air valve is arranged in the fresh air flow channel between the first flow channel and the fresh air outlet, and the air valve is provided with a first position for communicating the second return air inlet and the fresh air outlet and a second position for communicating the first flow channel and the fresh air outlet.
Preferably, the fresh air conditioner indoor unit further comprises a return air fan, and the return air fan is positioned in a return air discharge flow channel between the first return air inlet and the second flow channel; and/or the fresh air fan is arranged in a fresh air flow channel between the air valve and the fresh air outlet.
Preferably, a first indoor air index parameter detection part is arranged in a return air discharge flow channel between the first return air inlet and the second flow channel; and/or an outdoor air index parameter detection component is arranged in a fresh air flow channel between the fresh air inlet and the first flow channel; and/or a second indoor air index parameter detection part and/or a temperature sensor are/is arranged in a flow channel between the second return air inlet and the air valve.
Preferably, the first indoor air index parameter detection unit, the outdoor air index parameter detection unit, and the second indoor air index parameter detection unit are all carbon dioxide concentration sensors.
Preferably, the heat exchange core has a quadrangular or hexagonal shape.
The invention also provides a fresh air conditioner which comprises the fresh air conditioner indoor unit.
The invention also provides a control method of the fresh air conditioner, which is used for controlling the fresh air conditioner and comprises the following steps:
controlling the return air fan to rotate at a first return air rotating speed, controlling the fresh air fan to rotate at a first fresh air rotating speed, and controlling the air valve to be at a second position;
detecting a first indoor real-time index parameter n01 of indoor return air through a first indoor air index parameter detection component;
comparing n01 with the preset value Y of the first index parameter;
when n01 > Y, the ratio of,
acquiring a first outdoor real-time index parameter n through an outdoor air index parameter detection part;
acquiring a first fresh air intake amount h11 corresponding to a fresh air fan through a formula h ═ h (n01-Y)/(Y-n11), and acquiring a first return air intake amount h21 corresponding to a return air fan according to h11, wherein h is the total air amount of the air conditioning indoor space;
and controlling the fresh air fan to operate at the first fresh air real-time rotating speed of the fresh air fan corresponding to h11 and controlling the return air fan to operate at the first return air real-time rotating speed of the return air fan corresponding to h 21.
Preferably, h is obtained by:
acquiring a starting signal of a fresh air conditioner;
after a starting signal of the fresh air conditioner is acquired, controlling an air valve to be in a second position, controlling a return air fan to rotate at a second return air preset rotating speed, and acquiring a second indoor real-time index parameter n02 of the indoor return air through a first indoor air index parameter detection component;
after the return air fan operates for a first preset time t1, the fresh air fan is controlled to operate at a second fresh air preset rotating speed, a second outdoor real-time index parameter n12 of outdoor fresh air is obtained through the outdoor air index parameter detection part, and a third indoor real-time index parameter n03 of indoor return air is obtained through the first indoor air index parameter detection part;
h is obtained through a formula h-12 (n03-n12)/(n02-n03), wherein h12 is the intake of the second fresh air corresponding to the preset rotating speed of the second fresh air.
Preferably, the control method of the fresh air conditioner further includes:
acquiring the number m of people in the indoor space, acquiring the intake h12 of a second fresh air, wherein hm is the preset required intake of each person, and h12 is hm × m, and acquiring the intake h22 of a second return air corresponding to a return air fan according to h 12;
the first fresh air rotating speed is the rotating speed of a fresh air fan corresponding to h12, and the first return air rotating speed is the rotating speed of a return air fan corresponding to h 22.
Preferably, the first and second electrodes are formed of a metal,
and when the first return air real-time rotating speed reaches the rated maximum rotating speed of the return air fan, controlling the fresh air fan to operate at the rated maximum rotating speed.
Preferably, the first and second electrodes are formed of a metal,
and when n01 is less than or equal to Y, controlling the air valve to be at the first position, stopping the operation of the return air fan, and maintaining the rotation speed of the fresh air fan at the first fresh air rotation speed.
Preferably, the first and second electrodes are formed of a metal,
when n01 is less than or equal to Y, a temperature sensor is further included to obtain the real-time return air temperature T;
when the air conditioner is in the heating working condition, T is less than or equal to TIs provided with hWhen the frequency is increased, the compressor is controlled to operate in an up-conversion mode;
when the air conditioner is in the refrigeration working condition, when T is more than or equal to TLet cWhen the frequency is increased, the compressor is controlled to operate in an up-conversion mode;
wherein, TIs provided with hPreset heating target temperature, T, set for system or man-madeLet cTo be aThe preset refrigeration target temperature is set systematically or manually.
Preferably, the first and second electrodes are formed of a metal,
when n01 is less than or equal to Y, the air valve is located at the first position, the return air fan stops running, and the fresh air fan keeps running at the first fresh air rotating speed for a second preset time t2, a fourth indoor real-time index parameter n04 of the indoor return air is detected through a second indoor air index parameter detection component;
comparing n04 with a preset value X of a second index parameter, wherein X is more than Y;
when n04 is greater than or equal to X,
acquiring a third outdoor real-time index parameter n through an outdoor air index parameter detection component;
acquiring a third fresh air intake amount h13 corresponding to the fresh air fan through a formula h13 ═ h (n04-Y)/(Y-n13), and acquiring a third return air intake amount h23 corresponding to the return air fan according to h 13;
and controlling the fresh air fan to operate at the third fresh air real-time rotating speed of the fresh air fan corresponding to h13 and controlling the return air fan to operate at the third return air real-time rotating speed of the return air fan corresponding to h 23.
Preferably, h21 ═ a% h11, 70 ≦ a ≦ 90; and/or h22 is a% h12, 70 is less than or equal to a and less than or equal to 90; and/or h23 is a% h13, and a is more than or equal to 70 and less than or equal to 90.
According to the fresh air conditioner indoor unit, the fresh air conditioner and the control method of the fresh air conditioner, the fresh air channel and the return air channel corresponding to the second return air inlet share the air valve, so that the channel switching of the air conditioner in a fresh air mode and a return air mode can be realized through the air valve, the structure of the indoor unit is simplified, and the manufacturing cost of the air conditioner is reduced.
Drawings
Fig. 1 is a schematic view of an internal structure of an indoor unit of a fresh air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of an indoor unit of a fresh air conditioner according to another embodiment of the present invention;
FIG. 3 is a control logic flow chart of a control method of a fresh air conditioner according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a corresponding curve of the rotation speed-air volume of the return air fan or the fresh air fan according to the present invention;
fig. 5 is a schematic diagram of a corresponding curve of air volume-rotation speed of the return air fan or the fresh air fan in the present invention.
The reference numerals are represented as:
1. a housing; 11. a fresh air inlet; 12. a fresh air outlet; 13. a first return air inlet; 14. a second return air inlet; 15. an air return outlet; 2. a heat exchange core; 3. an air valve; 41. a return air fan; 42. a fresh air fan; 51. a first indoor air index parameter detection section; 52. an outdoor air index parameter detection part; 53. a second indoor air index parameter detection section; 54. a temperature sensor; 55. a human body detection sensor; 6. a heat exchanger; 7. and (4) a filter screen.
Detailed Description
Referring to fig. 1 to 5 in combination, according to an embodiment of the present invention, a fresh air indoor unit of a fresh air conditioner is provided, which includes a casing 1, the casing 1 is configured with a fresh air inlet 11, a fresh air outlet 12, a first return air inlet 13, a second return air inlet 14, and a return air outlet 15, the casing 1 is provided with a heat exchange core 2, the heat exchange core 2 is provided with a first flow channel and a second flow channel which are mutually crossed and form independent, the fresh air inlet 11, the first flow channel, and the fresh air outlet 12 are communicated to form a fresh air flow channel, the first return air inlet 13, the second flow channel, and the return air outlet 15 are communicated to form a return air discharge flow channel, an air valve 3 is provided in the fresh air flow channel between the first flow channel and the fresh air outlet 12, a heat exchanger 6 is further provided in the air flow channel between the air valve 3 and the fresh air outlet 12, the air valve 3 is provided with a first position which is communicated with the second return air inlet 14 and the fresh air outlet 12, and a first position which is communicated with the first flow channel and the return air outlet and the first flow channel and the return air outlet 12 are provided in the first flow channel and the return air outlet 3 are provided in the fresh air outlet 1 And a second position where the fresh air outlet 12 is through. In the technical scheme, the fresh air channel and the return air channel corresponding to the second return air inlet 14 share one air valve 3, so that the channel switching between the fresh air mode and the return air mode of the air conditioner can be realized through one air valve, the structure of the indoor unit is simplified, and the manufacturing cost of the air conditioner is reduced.
The fresh air indoor unit further comprises a return air fan 41, wherein the return air fan 41 is positioned in a return air discharge flow channel between the first return air inlet 13 and the second flow channel, so that the return air fan 41 can be close to the first return air inlet 13, and return air is more efficient when the air conditioner runs in a full fresh air mode; the fresh air channel is further provided with a fresh air fan 42, preferably, the fresh air fan 42 is located in the fresh air channel between the air valve 3 and the fresh air outlet 12, so that when the air valve 3 is located at a first position, that is, when the air conditioner is located in a full return air mode, the fresh air fan 42 can drive the return air of the second return air inlet 14, that is, when the fresh air fan 42 plays a role of a return air fan, and when the air valve 3 is located at a second position, that is, when the air conditioner is located in a fresh air mode, the fresh air fan 42 can drive the fresh air of the fresh air inlet 11, so that the fan-driven sharing is realized, and the manufacturing cost of the fresh air conditioner is further reduced.
In order to detect the indoor air quality, the outdoor air quality and the indoor return air temperature in real time, a first indoor air index parameter detecting component 51 is further arranged in a return air discharging flow channel between the first return air inlet 13 and the second flow channel; an outdoor air index parameter detection part 52 is arranged in a fresh air flow channel between the fresh air inlet 11 and the first flow channel; a second indoor air index parameter detection part 53 and/or a temperature sensor 54 are/is arranged in a flow passage between the second return air inlet 14 and the air valve 3. In some embodiments, it is preferable that the first indoor air index parameter detecting part 51, the outdoor air index parameter detecting part 52, and the second indoor air index parameter detecting part 53 are all carbon dioxide concentration sensors.
The structural style and shape of the heat exchange core 2 can be various, and as a specific implementation mode, the shape of the heat exchange core 2 is quadrilateral or hexagonal, so that the design of the fresh air flow channel, the return air discharge flow channel and the flow channel corresponding to the second return air inlet 14 can be more reasonable, and the structure of the indoor unit is more compact.
In order to be able to perform necessary treatment on the air flow in the corresponding air flow inlet and outlet, for example, to perform necessary treatment on particulate matters, harmful gases and the like in the air, it is preferable to arrange a corresponding filter screen at any one of the fresh air inlet 11, the fresh air outlet 12, the first return air inlet 13, the second return air inlet 14 and the return air outlet 15, especially to arrange a primary filter screen and a high efficiency filter screen (for example, HPA filter screen) at the fresh air inlet 11 and the fresh air outlet 12 respectively, so that the filter screen can effectively prevent visible dust and mosquitoes and the like from entering the unit, and the primary filter screen and the high efficiency filter screen can effectively adsorb harmful substances and PM2.5 in the outdoor air to prevent the outdoor air from polluting the indoor air.
According to an embodiment of the invention, the fresh air conditioner comprises the fresh air conditioner indoor unit.
Referring to fig. 3, according to an embodiment of the present invention, there is further provided a control method of a fresh air conditioner, for controlling the fresh air conditioner, including the following steps:
controlling the return air fan 41 to rotate at a first return air rotation speed, controlling the fresh air fan 42 to rotate at a first fresh air rotation speed, and controlling the air valve 3 to be at a second position, wherein the fresh air conditioner is in a running state at the moment;
detecting a first indoor real-time index parameter n01 (correspondingly, the first indoor real-time index parameter n01 at this time is, for example, a first indoor real-time carbon dioxide concentration value, the same applies to the following) of the indoor return air by a first indoor air index parameter detecting part 51 (for example, the first indoor air index parameter detecting part 51 is a carbon dioxide concentration sensor, the same applies to the following); comparing n01 with a first index parameter preset value Y (corresponding to the carbon dioxide concentration of the first index parameter preset value Y, the carbon dioxide concentration can be generally 450 ppm-700 ppm, and the comfortable carbon dioxide concentration range of human body is generally 350 ppm-1000 ppm the same below);
when n01 > Y, acquiring a first outdoor real-time index parameter n11 by an outdoor air index parameter detection part 52 (for example, the outdoor air index parameter detection part 52 is a carbon dioxide concentration sensor, the same applies below); acquiring a first fresh air intake amount h11 corresponding to the fresh air fan 42 through a formula h11 ═ h (n01-Y)/(Y-n11), and acquiring a first return air intake amount h21 corresponding to the return air fan 41 according to h11, wherein h is the total air amount of the air conditioning indoor space; the fresh air fan 42 is controlled to operate at the first fresh air real-time rotational speed of the fresh air fan 42 corresponding to h11 and the return air fan 41 is controlled to operate at the first return air real-time rotational speed of the return air fan 41 corresponding to h 21. In the technical scheme, the new air intake amount is obtained by adjusting the index parameters in the indoor space of the air conditioner and the index parameters of the outdoor air, and then the corresponding air return amount is obtained, and the operating rotating speed of the fan is further obtained by utilizing the corresponding relation between the rotating speed of the fan and the air amount, so that the accurate control of the air return fan 41 and the new air fan 42 is realized.
The aforementioned first fresh air real-time rotation speed of the fresh air fan 42 corresponding to h11 and the first return air real-time rotation speed of the return air fan 41 corresponding to h21 may be obtained in various manners, specifically, for example, the air volume (as shown in fig. 4) of the fresh air fan 42 and the return air fan 41 at a certain rotation speed and the rotation speed (as shown in fig.) of the return air fan 41 at a certain air volume are obtained in an experimental manner, and then the rotation speed and the air volume of the fans can be determined in a curve fitting manner, so that the return air volume and the intake air volume can be accurately adjusted. Preferably, the return air fan 41 and the fresh air fan 42 are selected from the same specification and model, so that the corresponding relation between the rotating speed of the fan and the air volume is simplified. More specifically, fresh air conditioner utensil has fan rotational speed control module: the two fan models of the unit are the same, the rotating speed of the fan of the unit is measured, the corresponding air quantity is recorded, a rotating speed-air quantity graph is drawn, the rotating speed corresponding to the air quantity, namely the air quantity-rotating speed graph, is deduced, the more the measured points are, the closer the curve on the graph is to an actual curve, as shown in fig. 4 and 5, the positive correlation between the vertical axis value and the horizontal axis value of the curve is, the linear function is approximate, and the relationship between the air quantity x and the rotating speed y can be approximately expressed as a linear function of y which is kx + b. In order to reduce error, the curve can be divided into a plurality of sections by a differential method, the number of the sections is large enough, each section of curve is infinitely approximated to be a straight line, and the relationship between the two can be expressed as
By the method, the rotating speed value of the fan can be calculated by the known air volume, certainly, a rotating speed database corresponding to the air volume can be obtained by an air volume-rotating speed diagram, and the rotating speed of the fan can be directly obtained by the known air volume.
The acquisition mode of h can be various, for example, it can be set manually, and preferably, h is acquired by the following mode: acquiring a starting signal of a fresh air conditioner; after a starting signal of the fresh air conditioner is acquired, controlling the air valve 3 to be in a second position, controlling the return air fan 41 to operate at a second return air preset rotating speed, and acquiring a second indoor real-time index parameter n02 of the indoor return air through the first indoor air index parameter detection part 51; after the return air fan 41 operates for a first preset time t1, the fresh air fan 42 is controlled to operate at a second fresh air preset rotating speed, a second outdoor real-time index parameter n12 of the outdoor fresh air is obtained through the outdoor air index parameter detection part 52, and a third indoor real-time index parameter n03 of the indoor return air is obtained through the first indoor air index parameter detection part 51; h is obtained through a formula h-12 (n03-n12)/(n02-n03), wherein h12 is the intake of the second fresh air corresponding to the preset rotating speed of the second fresh air. That is, in the technical scheme, the acquisition of h is in the initial stage of the starting operation of the fresh air conditioner, and the calculation structure of h is more accurate by utilizing the original concentration of indoor carbon dioxide, the original concentration of outdoor air carbon dioxide and the influence of outdoor air (namely fresh air) on the indoor carbon dioxide concentration after being introduced indoors, because the calculation process is obtained based on the sealing property of the air conditioning indoor space (building gap air leakage), compared with the manual setting in the related technology, the calculation of the formula already considers the objective factors of buildings.
Further, the amount of fresh air to enter is closely related to the number of people in the indoor space, and specifically, the control method of the fresh air conditioner further comprises the following steps: acquiring the number m of people in the indoor space, acquiring the intake h12 of a second fresh air, wherein h12 is hm, m is the preset required fresh air volume of each person (under the general condition, the required fresh air volume of each person is 30 m)3The second return air inlet amount h22 corresponding to the return air fan 41 is obtained according to h 12; first step ofThe wind rotating speed is the rotating speed of the fresh air fan 42 corresponding to h12, and the first return air rotating speed is the rotating speed of the return air fan 41 corresponding to h22, so that the rotating speed of the fresh air fan 42 and the fresh air intake rate can be matched with the number of people in the indoor space. The number m of the people can be detected by the human body detection sensor 55 by using a short wave detection technology and an infrared technology, that is, the corresponding human body detection sensor 55 is further arranged on the corresponding fresh air conditioner indoor unit (specifically, for example, arranged on the outer side wall of the fresh air outlet 12).
When the first return air real-time rotating speed reaches the rated maximum rotating speed of the return air fan 41, the new air fan 42 is controlled to operate at the rated maximum rotating speed so as to ensure that the return air quantity of the return air fan 41 is matched with the new air inlet quantity of the new air fan 42.
When n01 is less than or equal to Y, the air valve 3 is controlled to be in the first position, the return air fan 41 stops operating, the fresh air fan 42 is maintained to be in the first fresh air rotating speed operation, at the moment, the fresh air conditioner enters the full return air mode, at the moment, the real-time return air temperature T is further obtained through the temperature sensor 54, and when the air conditioner is in the heating working condition, when T is less than or equal to T, the air conditioner is in the heating working conditionIs provided with hIn the method, the compressor is controlled to run at the first preset frequency rising difference value for rising frequency, so that T can approach TIs provided with h(ii) a When the air conditioner is in the refrigeration working condition, when T is more than or equal to TLet cIn the meantime, the compressor is controlled to run at the second preset frequency rising difference value for rising frequency, so that T can approach TLet c(ii) a Wherein, TIs provided with hPreset heating target temperature, T, set for system or man-madeLet cAnd setting a preset refrigeration target temperature for the system or manually.
Further, when n01 is less than or equal to Y, the air valve 3 is located at the first position, the return air fan 41 stops operating, and the fresh air fan 42 is maintained to operate at the first fresh air rotating speed for a second preset time t2, the second indoor air index parameter detection component 53 detects a fourth indoor real-time index parameter n04 of indoor return air, that is, when the fresh air conditioner operates in the full return air mode, the detection of the indoor air index parameter (specifically, for example, the detection of a carbon dioxide concentration value) is still performed, the magnitude of n04 and a second index parameter preset value X is compared, X is greater than Y, and in some embodiments, 650ppm < X <900 ppm; when n04 is larger than or equal to X, acquiring a third outdoor real-time index parameter n13 through the outdoor air index parameter detection component 52; the third fresh air intake amount h13 corresponding to the fresh air fan 42 is obtained through a formula h13 ═ h (n04-Y)/(Y-n13), and the third return air intake amount h23 corresponding to the return air fan 41 is obtained according to h13, and it is worth noting that the value Y instead of the value X is adopted in the formula as a factor for calculation, so that the indoor carbon dioxide concentration value can more quickly approach to a lower concentration value, and the comfort of a human body is further improved; the fresh air fan 42 is controlled to operate at the third fresh air live speed of the fresh air fan 42 corresponding to h13 and the return air fan 41 is controlled to operate at the third return air live speed of the return air fan 41 corresponding to h 23.
In order to simplify the difficulty of obtaining the aforementioned h21, h22 and h23, it is preferable that h21 is a% h11, and/or h22 is a% h12, and/or h23 is a% h13, and 70 ≦ a ≦ 90 in consideration of the practical situation of the building.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (14)
1. The utility model provides a fresh air conditioner indoor unit, its characterized in that, includes casing (1), casing (1) is gone up to construct fresh air import (11), fresh air export (12), first return air import (13), second return air import (14), return air export (15), heat exchange core (2) have in casing (1), have on the heat exchange core (2) and intersect each other and form independent first runner and second runner, fresh air import (11), first runner and fresh air export (12) link up and form the fresh air runner, first return air import (13), second runner, return air export (15) link up and form return air exhaust runner first runner with have air valve (3) in the fresh air runner between fresh air export (12), air valve (3) have make second return air import (14) with the first position that fresh air export (12) link up and make first runner with fresh air export (12) link up ) A second position of pass-through.
2. The fresh air indoor unit of claim 1, further comprising a return air blower (41), wherein the return air blower (41) is disposed in a return air discharge flow path between the first return air inlet (13) and the second flow path; and/or the fresh air fan (42) is further included, and the fresh air fan (42) is positioned in a fresh air flow channel between the air valve (3) and the fresh air outlet (12).
3. The fresh air indoor unit of claim 1, wherein a first indoor air index parameter detecting part (51) is provided in a return air exhaust flow passage between the first return air inlet (13) and the second flow passage; and/or an outdoor air index parameter detection part (52) is arranged in a fresh air flow channel between the fresh air inlet (11) and the first flow channel; and/or a second indoor air index parameter detection part (53) and/or a temperature sensor (54) are/is arranged in a flow passage between the second return air inlet (14) and the air valve (3).
4. The fresh air indoor unit of claim 3, wherein the first indoor air index parameter detection unit (51), the outdoor air index parameter detection unit (52) and the second indoor air index parameter detection unit (53) are carbon dioxide concentration sensors.
5. The fresh air indoor unit of claim 1, wherein the heat exchange core (2) is quadrilateral or hexagonal in shape.
6. A fresh air conditioner, comprising a fresh air conditioner indoor unit, characterized in that the fresh air conditioner indoor unit is the fresh air conditioner indoor unit of any one of claims 1 to 5.
7. A control method of a fresh air conditioner, which is used for controlling the fresh air conditioner as claimed in claim 6, comprises the following steps:
controlling the return air fan (41) to rotate at a first return air rotating speed, controlling the fresh air fan (42) to rotate at a first fresh air rotating speed, and controlling the air valve (3) to be at a second position;
detecting a first indoor real-time index parameter n01 of indoor return air through a first indoor air index parameter detection part (51);
comparing n01 with the preset value Y of the first index parameter;
when n01 > Y, the ratio of,
acquiring a first outdoor real-time index parameter n11 through an outdoor air index parameter detection part (52);
acquiring a first fresh air intake amount h11 corresponding to a fresh air fan (42) through a formula h11= h (n01-Y)/(Y-n11), and acquiring a first return air intake amount h21 corresponding to a return air fan (41) according to h11, wherein h is the total air amount of the air conditioning indoor space;
and controlling the fresh air fan (42) to operate at the first fresh air real-time rotating speed of the fresh air fan (42) corresponding to h11 and controlling the return air fan (41) to operate at the first return air real-time rotating speed of the return air fan (41) corresponding to h 21.
8. The control method of the fresh air conditioner according to claim 7, wherein h is obtained by:
acquiring a starting signal of a fresh air conditioner;
after a starting signal of the fresh air conditioner is acquired, the air valve (3) is controlled to be in a second position, the return air fan (41) is controlled to operate at a second return air preset rotating speed, and a second indoor real-time index parameter n02 of the indoor return air is acquired through the first indoor air index parameter detection component (51);
after the return air fan (41) operates for a first preset time t1, the fresh air fan (42) is controlled to operate at a second fresh air preset rotating speed, a second outdoor real-time index parameter n12 of the outdoor fresh air is obtained through the outdoor air index parameter detection part (52), and a third indoor real-time index parameter n03 of the indoor return air is obtained through the first indoor air index parameter detection part (51);
h is obtained through a formula h = h12 (n03-n12)/(n02-n03), wherein h12 is the intake of the second fresh air corresponding to the preset rotating speed of the second fresh air.
9. The method for controlling the fresh air conditioner according to claim 7, further comprising:
acquiring the number m of people in the indoor space, acquiring the intake h12 of a second fresh air demand, wherein hm is the preset required fresh air volume of each person, and h12= hm × m, and acquiring the intake h22 of a second return air demand corresponding to a return air fan (41) according to h 12;
the first fresh air rotating speed is the rotating speed of a fresh air fan (42) corresponding to h12, and the first return air rotating speed is the rotating speed of a return air fan (41) corresponding to h 22.
10. The control method of the fresh air conditioner according to claim 7,
and when the first return air real-time rotating speed reaches the rated maximum rotating speed of the return air fan (41), controlling the fresh air fan (42) to operate at the rated maximum rotating speed.
11. The control method of the fresh air conditioner according to claim 7,
and when n01 is less than or equal to Y, controlling the air valve (3) to be at the first position, stopping the operation of the return air fan (41), and maintaining the operation of the fresh air fan (42) at the first fresh air rotating speed.
12. The control method of the fresh air conditioner according to claim 11,
when n01 is less than or equal to Y, a temperature sensor (54) is further included to obtain the real-time return air temperature T;
when the air conditioner is in the heating working condition, T is less than or equal to TIs provided with hWhen the frequency is increased, the compressor is controlled to operate in an up-conversion mode;
when the air conditioner is in the refrigeration working condition, when T is more than or equal to TLet cWhen the frequency is increased, the compressor is controlled to operate in an up-conversion mode;
wherein, TIs provided with hPreset heating target temperature, T, set for system or man-madeLet cAnd setting a preset refrigeration target temperature for the system or manually.
13. The control method of the fresh air conditioner according to claim 11,
when n01 is less than or equal to Y, the air valve (3) is located at the first position, the return air fan (41) stops running, and the fresh air fan (42) keeps running at the first fresh air rotating speed for a second preset time t2, a fourth indoor real-time index parameter n04 of the indoor return air is detected through a second indoor air index parameter detection component (53);
comparing n04 with a preset value X of a second index parameter, wherein X is more than Y;
when n04 is greater than or equal to X,
acquiring a third outdoor real-time index parameter n13 by an outdoor air index parameter detection part (52);
acquiring a third fresh air intake amount h13 corresponding to a fresh air fan (42) through a formula h13= h (n04-Y)/(Y-n13), and acquiring a third return air intake amount h23 corresponding to a return air fan (41) according to h 13;
and controlling the fresh air fan (42) to operate at the third fresh air real-time rotating speed of the fresh air fan (42) corresponding to h13 and controlling the return air fan (41) to operate at the third return air real-time rotating speed of the return air fan (41) corresponding to h 23.
14. The control method of the fresh air conditioner according to claim 13,
h21= a% h11, and a is more than or equal to 70 and less than or equal to 90; and/or h22= a% h12, 70 ≤ a ≤ 90; and/or h23= a% h13, 70 ≤ a ≤ 90.
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