CN114992817A - Sleep temperature control method and fresh air conditioning system - Google Patents
Sleep temperature control method and fresh air conditioning system Download PDFInfo
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- CN114992817A CN114992817A CN202210698784.4A CN202210698784A CN114992817A CN 114992817 A CN114992817 A CN 114992817A CN 202210698784 A CN202210698784 A CN 202210698784A CN 114992817 A CN114992817 A CN 114992817A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004378 air conditioning Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 93
- 238000001816 cooling Methods 0.000 claims abstract description 65
- 238000001914 filtration Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 29
- 230000000694 effects Effects 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 5
- 230000003860 sleep quality Effects 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000036039 immunity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 206010062519 Poor quality sleep Diseases 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/66—Sleep 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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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
- F24F7/003—Ventilation in combination with air cleaning
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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
- F24F7/007—Ventilation with forced flow
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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
Abstract
The embodiment of the invention provides a sleep temperature control method and a fresh air conditioning system. The sleep temperature control method comprises the following steps: starting a sleep mode; acquiring the temperature of fresh air; controlling a first temperature adjusting device and a second temperature adjusting device to adjust the temperature of the fresh air according to the temperature of the fresh air; and/or controlling the fresh air to be mixed with the indoor air according to the temperature of the fresh air so as to regulate the temperature of the fresh air; when the air conditioner is in heating operation, the first temperature adjusting device is a first heating device, and the second temperature adjusting device is a second heating device; when the air conditioner operates in a refrigerating mode, the first temperature adjusting device is a first cooling device, and the second temperature adjusting device is a second cooling device. The invention solves the technical problem that the fresh air blows to the surface of a human body due to the large temperature difference between the fresh air and the indoor environment, and the discomfort is caused by the hot wind feeling or the cold wind feeling.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a sleep temperature control method and a fresh air conditioning system.
Background
With the development of science and technology and the increasing improvement of the living standard of people, the air conditioner becomes an indispensable household appliance in the life of people. With the technology becoming mature and the competition becoming fierce, the quality requirements of the air conditioner for consumers are higher and higher.
At present, in an air conditioner fresh air system, the fresh air and the indoor environment have large temperature difference, and the fresh air is blown to the surface of a human body and can cause discomfort due to hot wind feeling or cold wind feeling.
Disclosure of Invention
In order to solve the problem that the fresh air blows to the surface of a human body and causes discomfort due to hot wind feeling or cold wind feeling because of larger temperature difference between the fresh air and the indoor environment, the invention provides a sleep temperature control method, which comprises the following steps: starting a sleep mode; acquiring the temperature of fresh air; controlling a first temperature adjusting device and a second temperature adjusting device to adjust the temperature of the fresh air according to the temperature of the fresh air; and/or controlling the fresh air to be mixed with the indoor air according to the temperature of the fresh air so as to regulate the temperature of the fresh air; when the air conditioner is in heating operation, the first temperature adjusting device is a first heating device, and the second temperature adjusting device is a second heating device; when the air conditioner operates in a refrigerating mode, the first temperature adjusting device is a first cooling device, and the second temperature adjusting device is a second cooling device.
The technical effect achieved after the technical scheme is adopted is as follows: after the air conditioner starts a sleep mode, the temperature of fresh air is obtained, and the first temperature adjusting device and the second temperature adjusting device are controlled according to the temperature of the fresh air to adjust the temperature of the fresh air; and \ or according to the new trend temperature control new trend mixes with indoor wind and carries out temperature regulation to the new trend, can adjust the new trend temperature through first temperature regulation apparatus and second temperature regulation apparatus and the mode that new trend and indoor wind mixed to can carry out heat treatment to the new trend temperature when the new trend temperature is low excessively, cool down the processing to the new trend temperature when the new trend temperature is too high, and then can improve user's sleep comfort level and sleep quality.
In this embodiment, the temperature of the fresh air is adjusted by controlling the temperature adjusting device according to the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include: and controlling the on-off states of the first temperature adjusting device and the second temperature adjusting device and the on-off state of the indoor air guide piece according to the relation between the fresh air temperature and the fresh air temperature threshold value.
The technical effect achieved after the technical scheme is adopted is as follows: according to the size relation of new trend temperature and new trend temperature threshold value, can control the on off state of first temperature regulation device and second temperature regulation device and the on off state of indoor air guide more accurately to can heat up or cool down the processing to the new trend temperature more accurately, and then can be when guaranteeing new trend air-out temperature, reduce the energy consumption of air conditioner.
In this embodiment, when the air conditioner is in heating operation, the temperature of the fresh air is adjusted by controlling the temperature adjusting device according to the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include: if T is less than or equal to T1, the first heating device is started, the second heating device is started, the first temperature adjusting area is controlled in a first temperature range, the second temperature adjusting area is controlled in a second temperature range, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if T is more than T1 and less than or equal to T2, the first heating device is closed, the second heating device is started, the second temperature adjusting area is controlled in a third temperature range, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if T is more than T2 and less than or equal to T3, the first heating device is closed, the second heating device is closed, the indoor air guide component is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are synchronously started; if T is more than T3, the first heating device is closed, the second heating device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
The technical effect achieved after the technical scheme is adopted is as follows: when the air conditioner is in heating operation, if the fresh air temperature T is less than or equal to a first temperature threshold value T1, the fresh air temperature is very low, so that a first heating device and a second heating device are started simultaneously, the first temperature adjusting area is controlled in a first temperature range, the second temperature adjusting area is controlled in a second temperature range, an indoor air guide member is opened, indoor air is introduced into a fresh air mixing area, the fresh air is controlled to be mixed with the indoor air, and an air conditioner and a fresh air mode are started synchronously; if the first temperature threshold value T1 is larger than the fresh air temperature T and smaller than or equal to the second temperature threshold value T2, the fresh air temperature is lower, in order to reduce the energy consumption of the air conditioner, only the second heating device is started, the fresh air outlet temperature is adjusted in a mode of combining the fresh air and the indoor air, so that the first heating device is closed, the second heating device is started, the second temperature adjusting area is controlled in a third temperature range, the indoor air guide member is opened, the fresh air and the indoor air are controlled to be mixed, and the air conditioner and the fresh air mode are synchronously started; if the second temperature threshold T2 is larger than the fresh air temperature T and smaller than or equal to the third temperature threshold T3, the fresh air temperature is slightly low, at the moment, the heating device does not need to be started, the adjustment of the fresh air outlet temperature can be completed in a mode of mixing fresh air and indoor air, so that the first heating device is closed, the second heating device is closed, the indoor air guide member is opened, the mixture of the fresh air and the indoor air is controlled, and the air conditioner and the fresh air mode are synchronously started; if the fresh air temperature T is larger than a third temperature threshold value T3, the fresh air temperature is appropriate, the fresh air temperature does not need to be adjusted, and therefore the first heating device is closed, the second heating device is closed, the indoor air guide component is closed, and the fresh air mode is independently started.
In this embodiment, when the air conditioner operates in a refrigerating mode, the temperature of the fresh air is adjusted by controlling the temperature adjusting device according to the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include: if T is larger than or equal to T4, the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled to be in a fourth temperature interval, the second temperature adjusting area is controlled to be in a fifth temperature interval, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if T4 is larger than or equal to T5, the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled in a sixth temperature range, the second temperature adjusting area is controlled in a seventh temperature range, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if T5 is larger than T and is not less than T6, closing the first cooling device, opening the second cooling device, controlling the second temperature regulation area to be in an eighth temperature interval, opening the indoor air guide component, controlling the fresh air to be mixed with the indoor air, and synchronously opening an air conditioner and a fresh air mode; if T is greater than T6, the first cooling device is closed, the second cooling device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
The technical effect achieved after the technical scheme is adopted is as follows: when the air conditioner operates in a refrigerating mode, if the fresh air temperature T is larger than or equal to a fourth temperature threshold T4, the current fresh air temperature is very high, the temperature difference between the fresh air temperature and the indoor environment temperature is very large, two cooling devices are required to be started simultaneously, fresh air and indoor air are controlled to be mixed, the fresh air temperature is cooled, therefore, the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled to be in a fourth temperature range, the second temperature adjusting area is controlled to be in a fifth temperature range, the indoor air guide part is opened, the fresh air and the indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if the fourth temperature threshold T4 is greater than or equal to the fresh air temperature T and greater than or equal to the fifth temperature threshold T5, the current fresh air temperature is higher, the temperature difference between the fresh air temperature and the indoor environment temperature is larger, two cooling devices are required to be started simultaneously, and fresh air and indoor air are controlled to be mixed to cool the fresh air temperature, so that the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled to be in a sixth temperature range, the second temperature adjusting area is controlled to be in a seventh temperature range, the indoor air guide part is opened, the fresh air and the indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if the fifth temperature threshold T5 is larger than the fresh air temperature T which is not less than the sixth temperature threshold T6, the fact that the temperature of the fresh air is slightly high, a certain temperature difference exists between the fresh air temperature and the indoor environment temperature, but the temperature difference is not very large, the first cooling device is closed, the second cooling device is opened, the second temperature adjusting area is controlled in an eighth temperature range, the indoor air guide component is opened, the fresh air and the indoor air are controlled to be mixed, and the air conditioner and the fresh air mode are synchronously started; if the fresh air temperature T is greater than a sixth temperature threshold value T6, the current fresh air temperature is appropriate, the fresh air temperature and the indoor environment temperature are relatively close to each other, and the fresh air is not required to be cooled and adjusted, so that the first cooling device is closed, the second cooling device is closed, the indoor air guide piece is closed, and the fresh air mode is independently opened.
In this embodiment, the sleep temperature control method further includes: determining a specific sleep mode according to a sleep mode time interval of the current time; adjusting the target temperature and the wind level of the fresh air fan according to the specific sleep mode and the operation condition of the air conditioner; wherein the specific sleep modes comprise a noon sleep mode and a night sleep mode; the operation condition of the air conditioner comprises an independent fresh air opening mode, a synchronous air conditioner opening mode and a fresh air mode.
The technical effect achieved after the technical scheme is adopted is as follows: the specific sleep mode is determined according to the sleep mode time interval in which the current time is positioned, so that the target temperature and the wind level of the fresh air fan can be correspondingly adjusted according to different user requirements of the lunch sleep mode and the night sleep mode; when the air conditioner and the fresh air mode are started synchronously, the target temperature and the wind gear of the fresh air fan need to be adjusted; when the new trend mode is opened alone, only need to adjust the windshield of new trend fan can.
In this embodiment, under the condition of synchronously starting air conditioner and fresh air mode, adjusting target temperature and fresh air fan wind gear according to the specific sleep mode and the air conditioner operation condition includes: when the device is in a noon sleeping mode, controlling the target temperature to be a first target temperature, and operating the fresh air fan at a low wind gear; after the operation is carried out for a first preset time, the first target temperature is increased; when the device is in a night sleep mode, controlling the target temperature to be a first target temperature, and operating the fresh air fan at a low wind gear; after running for a second preset time, improving the first target temperature; and after the operation lasts for the third time, the first target temperature is increased again, and the wind gear operation in the fresh air fan is controlled.
The technical effect achieved after the technical scheme is adopted is as follows: under the condition of synchronously starting the air conditioner and the fresh air mode, when the sleep is in the initial stage, the noise can be reduced by controlling the operation of the fresh air damper and the low windshield, and a user can conveniently sleep; the temperature is increased, so that the human body is easier to enter a deep sleep state from a light sleep state, the human body enters the deep sleep state at the same time, the immunity is reduced, and the higher environmental temperature needs to be kept, so that the first target temperature is increased after the human body is in a lunch sleep mode and runs for a first preset time; when the mobile terminal is in a night sleep mode and runs for a second preset time, the first target temperature is increased; in order to increase the fresh air ventilation rate and reduce the content of CO2 in the room, when the room is in the night sleep mode and operates for a third time period, the first target temperature is increased again, and meanwhile, the fresh air fan is controlled to operate from a low wind shield to a medium wind shield.
In this embodiment, under the condition of opening new trend mode alone, according to concrete sleep mode and air conditioner operating condition adjustment target temperature and new trend fan wind shelves include: when the device is in a noon sleeping mode, controlling the low wind gear of the fresh air fan to operate; when the novel air conditioner is in the night sleep mode, the low wind gear of the novel air fan is controlled to operate, and after the novel air conditioner operates for the fourth time, the wind gear of the novel air fan is controlled to operate.
The technical effect achieved after the technical scheme is adopted is as follows: under the condition of independently starting the fresh air mode, the effect of reducing noise and facilitating sleeping can be achieved by reducing the windshield, so that when the fresh air fan is in the noon sleeping mode, the operation of the fresh air fan at a low wind gear is controlled; when the device is in a night sleep mode, the low wind gear of the fresh air fan is controlled to operate; after the fourth time period, in order to increase the fresh air exchange rate and reduce the content of CO2 in the room, the fresh air fan is controlled to be adjusted from low-windshield operation to medium-windshield operation.
In this embodiment, when the air conditioner receives a sleep mode end instruction or the current time is not in the sleep mode time interval, the sleep mode is exited.
The technical effect achieved after the technical scheme is adopted is as follows: if the air conditioner receives a sleep mode ending instruction or the current time is not in the sleep mode time interval, the user requirement changes, and at the moment, the air conditioner does not need to build a comfortable sleep environment, so the air conditioner exits the sleep mode.
The embodiment of the invention provides a fresh air conditioning system, which comprises a fresh air processing system and an air conditioning system, wherein the fresh air conditioning system executes the sleep temperature control method in any one of the previous embodiments.
In this embodiment, the fresh air processing system includes a fresh air intake duct and an indoor unit air duct communicated with the fresh air intake duct, and the fresh air intake duct includes: the filtering area is provided with a first temperature detection device; the first temperature adjusting area is communicated with the filtering area, and the first heating area comprises a first heating device and a first cooling device; the second temperature adjusting area is communicated with the first temperature adjusting area and comprises a second heating device and a second cooling device; the fresh air mixing area is communicated with the second temperature adjusting area, and the fresh air mixing area is provided with an indoor air guide piece used for opening or closing the indoor air inlet.
The technical effect achieved after the technical scheme is adopted is as follows: by arranging the filtering area, fresh air entering the air inlet duct can be filtered, dedusted and decontaminated; by arranging the first temperature regulation area and the second temperature regulation area, when the air conditioner is in heating operation, the first heating device of the first temperature regulation area and the second heating device of the second temperature regulation area can be combined to heat the fresh air; when the air conditioner operates in a refrigerating mode, the fresh air can be cooled by combining a first cooling device of the first temperature adjusting area and a second cooling device of the second temperature adjusting area; the problems that the comfort of a user is poor and the sleep quality is affected due to the fact that the temperature difference between the fresh air temperature and the indoor environment temperature is too large are solved; in addition, because the new trend wind channel of admitting air is provided with the new trend and mixes the region, consequently can carry out temperature regulation to the new trend through the mode of mixing new trend and indoor wind.
In summary, the above embodiments of the present application may have one or more of the following advantages or benefits:
(1) after the air conditioner starts a sleep mode, the temperature of fresh air is obtained, and the first temperature adjusting device and the second temperature adjusting device are controlled according to the temperature of the fresh air to adjust the temperature of the fresh air; and \ or according to new trend temperature control new trend mixes carries out temperature regulation to the new trend with indoor wind, can adjust the new trend temperature through the mode that first temperature regulation apparatus and second temperature regulation apparatus and new trend and indoor wind mixed to can carry out heat treatment to the new trend temperature when the new trend temperature is low excessively, cool down the processing to the new trend temperature when the new trend temperature is too high, and then can improve user's sleep comfort level and sleep quality.
(2) According to the big or small relation of new trend temperature and new trend temperature threshold value, can control the on off state of first temperature regulation device and second temperature regulation device and the on off state of indoor air guide more accurately to can heat up or cool down the processing to the new trend temperature more accurately, and then can reduce the energy consumption of air conditioner when guaranteeing new trend air-out temperature.
(3) The specific sleep mode is determined according to the sleep mode time interval of the current time, so that the target temperature and the wind shield of the fresh air fan can be correspondingly adjusted according to different user requirements of a lunch sleep mode and a night sleep mode; when the air conditioner and the fresh air mode are started synchronously, the target temperature and the wind gear of the fresh air fan need to be adjusted; when the new trend mode is opened alone, only need to adjust the windshield of new trend fan can.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of a sleep temperature control method in a heating mode.
Fig. 2 is a schematic flow chart of the sleep temperature control method in the cooling mode.
Fig. 3 is a flowchart illustrating a sleep temperature control method.
Fig. 4 is a schematic structural diagram of a fresh air processing system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
A first embodiment of the present invention provides a sleep temperature control method, referring to fig. 1 to 3, for example, the sleep temperature control method includes the following steps: starting a sleep mode; acquiring the temperature of fresh air; controlling a first temperature adjusting device and a second temperature adjusting device to adjust the temperature of the fresh air according to the temperature of the fresh air; and/or controlling the fresh air to be mixed with the indoor air according to the temperature of the fresh air so as to regulate the temperature of the fresh air; when the air conditioner is in heating operation, the first temperature adjusting device is a first heating device, and the second temperature adjusting device is a second heating device; when the air conditioner operates in a refrigerating mode, the first temperature adjusting device is a first cooling device, and the second temperature adjusting device is a second cooling device. For example, the cooling device is a pre-cooler and the heating device is an auxiliary heater.
In one embodiment, after the air conditioner starts the sleep mode, the temperature of fresh air is obtained, and the first temperature adjusting device and the second temperature adjusting device are controlled according to the temperature of the fresh air to adjust the temperature of the fresh air; and \ or according to the new trend temperature control new trend mixes with indoor wind and carries out temperature regulation to the new trend, can adjust the new trend temperature through first temperature regulation apparatus and second temperature regulation apparatus and the mode that new trend and indoor wind mixed to can carry out heat treatment to the new trend temperature when the new trend temperature is low excessively, cool down the processing to the new trend temperature when the new trend temperature is too high, and then can improve user's sleep comfort level and sleep quality.
Further, controlling a temperature adjusting device to adjust the temperature of the fresh air according to the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include: and controlling the on-off states of the first temperature adjusting device and the second temperature adjusting device and the on-off state of the indoor air guide piece according to the relation between the fresh air temperature and the fresh air temperature threshold value.
In a specific embodiment, according to the relation between the fresh air temperature and the fresh air temperature threshold, the on-off states of the first temperature adjusting device and the second temperature adjusting device and the on-off state of the indoor air guide member can be controlled more accurately, so that the temperature of the fresh air can be increased or decreased more accurately, and the energy consumption of the air conditioner can be reduced while the fresh air outlet temperature is ensured.
Further, when the air conditioner is in heating operation, the temperature of the fresh air is adjusted by controlling a temperature adjusting device according to the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include: if T is less than or equal to T1, starting the first heating device, starting the second heating device, controlling the first temperature adjusting area to be in a first temperature range, controlling the second temperature adjusting area to be in a second temperature range, opening the indoor air guide component, controlling the fresh air to be mixed with the indoor air, and synchronously starting an air conditioner and a fresh air mode; if T is more than T1 and less than or equal to T2, the first heating device is closed, the second heating device is started, the second temperature adjusting area is controlled in a third temperature range, the indoor air guide component is opened, fresh air is controlled to be mixed with indoor air, and an air conditioner and a fresh air mode are synchronously started; if T is more than T2 and less than or equal to T3, the first heating device is closed, the second heating device is closed, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are synchronously started; if T is more than T3, the first heating device is closed, the second heating device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
In one embodiment, when the air conditioner is in heating operation, if the fresh air temperature T is less than or equal to a first temperature threshold T1, it indicates that the fresh air temperature is very low, so that the first heating device and the second heating device are simultaneously started, the first temperature adjusting region is controlled in a first temperature range, the second temperature adjusting region is controlled in a second temperature range, the indoor air guide member is opened, indoor air is introduced into the fresh air mixing region, the fresh air and the indoor air are controlled to be mixed, and the air conditioner and the fresh air mode are synchronously started; if the first temperature threshold value T1 is larger than the fresh air temperature T and smaller than or equal to the second temperature threshold value T2, the fresh air temperature is lower, in order to reduce the energy consumption of the air conditioner, only the second heating device is started, the fresh air outlet temperature is adjusted in a mode of combining the fresh air and the indoor air, so that the first heating device is closed, the second heating device is started, the second temperature adjusting area is controlled in a third temperature range, the indoor air guide member is opened, the fresh air and the indoor air are controlled to be mixed, and the air conditioner and the fresh air mode are synchronously started; if the second temperature threshold T2 is larger than the fresh air temperature T and smaller than or equal to the third temperature threshold T3, the fresh air temperature is slightly low, at the moment, the heating device does not need to be started, the adjustment of the fresh air outlet temperature can be completed in a mode of mixing fresh air and indoor air, so that the first heating device is closed, the second heating device is closed, the indoor air guide member is opened, the mixture of the fresh air and the indoor air is controlled, and the air conditioner and the fresh air mode are synchronously started; if the fresh air temperature T is larger than a third temperature threshold value T3, the fresh air temperature is appropriate, the fresh air temperature does not need to be adjusted, and therefore the first heating device is closed, the second heating device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
For example, in the case of heating operation of the air conditioner, after low-temperature fresh air enters the filtering area, the temperature of the fresh air is detected by the first thermal bulb and is recorded as T1. The first temperature adjusting area is a first heating area; the second temperature adjustment area is a second heating area.
When T1 is less than 8 ℃, a first auxiliary heater is started, a second auxiliary heater is started, the temperature of a first heating area is controlled to be 10 +/-1 ℃ at T2, the temperature of a second heating area is controlled to be 20 +/-1 ℃ at T3, an indoor air guide door is opened, fresh air enters an indoor air channel after being mixed, an air conditioner and the fresh air are synchronously started, the air conditioner sets the target temperature to be 26 ℃, a wind damper in the fresh air runs, and the climate-friendly temperature is maintained. When the temperature of 8 ℃ is less than or equal to 16 ℃ and less than or equal to T1 ℃, the first auxiliary heater is closed, the second auxiliary heater is opened, the temperature of the second heating area is controlled at T3 which is 18 +/-2 ℃, the indoor air guide door is opened, the fresh air is mixed and then enters the indoor air duct, the air conditioner and the fresh air are synchronously opened, the target temperature of the air conditioner is set to be 26 ℃, and the air guide plate runs in the fresh air. And when the temperature is 17 ℃ and T1 is less than or equal to 22 ℃, closing the first auxiliary heater, closing the second auxiliary heater, opening an indoor air guide door, mixing fresh air, then feeding the mixed fresh air into an indoor air duct, synchronously opening an air conditioner and the fresh air, setting the target temperature of the air conditioner to be 26 ℃, and operating the fresh air in a windshield mode. When the temperature T1 is higher than 23 ℃, the first auxiliary heater is closed, the second auxiliary heater is closed, the indoor air guide door is closed, fresh air directly enters the air duct of the indoor unit, the fresh air mode is independently opened, and the fresh air middle damper runs.
Further, when the air conditioner operates in a refrigerating mode, the temperature of the fresh air is adjusted by controlling the temperature adjusting device according to the temperature of the fresh air; and/or according to fresh air temperature control fresh air mixes with indoor wind and carries out temperature regulation to the fresh air include: if T is more than or equal to T4, starting the first cooling device, starting the second cooling device, controlling the first temperature regulation area to be in a fourth temperature range, controlling the second temperature regulation area to be in a fifth temperature range, opening the indoor air guide component, controlling the fresh air to be mixed with the indoor air, and synchronously starting an air conditioner and a fresh air mode; if T4 is more than T and is not less than T5, the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled in a sixth temperature range, the second temperature adjusting area is controlled in a seventh temperature range, the indoor air guide piece is opened, fresh air is controlled to be mixed with indoor air, and an air conditioner and a fresh air mode are synchronously started; if T5 is larger than T and is not less than T6, closing the first cooling device, opening the second cooling device, controlling the second temperature regulation area to be in an eighth temperature interval, opening the indoor air guide component, controlling the fresh air to be mixed with the indoor air, and synchronously opening an air conditioner and a fresh air mode; if T is greater than T6, the first cooling device is closed, the second cooling device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
In one embodiment, when the air conditioner operates in a cooling mode, if the fresh air temperature T is greater than or equal to a fourth temperature threshold T4, it indicates that the current fresh air temperature is very high, the temperature difference between the fresh air temperature and the indoor environment temperature is very large, two cooling devices need to be simultaneously started, and fresh air and indoor air are controlled to be mixed to cool the fresh air temperature, so that the first cooling device is started, the second cooling device is started, the first temperature regulation area is controlled to be in a fourth temperature interval, the second temperature regulation area is controlled to be in a fifth temperature interval, the indoor air guide member is opened, fresh air and indoor air are controlled to be mixed, and the air conditioner and the fresh air mode are synchronously started; if the fourth temperature threshold T4 is greater than or equal to the fresh air temperature T and greater than or equal to the fifth temperature threshold T5, the current fresh air temperature is higher, the temperature difference between the fresh air temperature and the indoor environment temperature is larger, two cooling devices are required to be started simultaneously, and fresh air and indoor air are controlled to be mixed to cool the fresh air temperature, so that the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled to be in a sixth temperature range, the second temperature adjusting area is controlled to be in a seventh temperature range, the indoor air guide part is opened, the fresh air and the indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously; if the fifth temperature threshold value T5 is greater than the fresh air temperature T which is not less than the sixth temperature threshold value T6, it is indicated that the temperature of the fresh air is slightly high, a certain temperature difference exists between the fresh air temperature and the indoor environment temperature, but the temperature difference is not very large, so that the first cooling device is closed, the second cooling device is opened, the second temperature adjusting area is controlled in an eighth temperature range, the indoor air guide component is opened, the fresh air and the indoor air are controlled to be mixed, and the air conditioner and the fresh air mode are synchronously opened; if the fresh air temperature T is greater than a sixth temperature threshold value T6, the current fresh air temperature is appropriate, the fresh air temperature and the indoor environment temperature are relatively close to each other, and the fresh air is not required to be cooled and adjusted, so that the first cooling device is closed, the second cooling device is closed, the indoor air guide piece is closed, and the fresh air mode is independently opened.
For example, in the case of refrigeration operation of an air conditioner, when T1 is greater than 43 ℃, the first precooler is started, the second precooler is started, the temperature of the first heating area is controlled to be 37 ± 2 ℃ at T2, the temperature of the second heating area is controlled to be 31 ± 2 ℃ at T3, an indoor air guide door is opened, fresh air is mixed and then enters an indoor air duct, the air conditioner and the fresh air are synchronously started, the target temperature of the air conditioner is set to be 26 ℃, and the fresh air is operated in a middle windshield manner. When the temperature of 43 ℃ is higher than T1 and is larger than or equal to 35 ℃, a first precooler is started, a second precooler is started, the temperature of a first heating area is controlled to be 32 +/-1 ℃ at T2, the temperature of a second heating area is controlled to be 28 +/-1 ℃ at T3, an indoor air guide door is opened, fresh air is mixed and then enters an indoor air duct, an air conditioner and the fresh air are synchronously started, the target temperature of the air conditioner is set to be 26 degrees, and the air guide door in the fresh air runs. When the temperature of the second heating area is controlled to be 26 +/-2 ℃ at the temperature of T2 > T1 which is more than or equal to 27 ℃, the first precooler is closed, the second precooler is opened, the indoor air guide door is opened, the fresh air enters an indoor air duct after being mixed, the air conditioner and the fresh air are synchronously opened, the target temperature of the air conditioner is set to be 26 ℃, and the air guide door in the fresh air runs. When the temperature T1 is lower than 27 ℃, the first precooler is closed, the second precooler is closed, the indoor air guide door is closed, fresh air directly enters the air duct of the indoor unit, the fresh air mode is independently opened, and the fresh air middle windshield runs.
Further, the sleep temperature control method further comprises the following steps: determining a specific sleep mode according to a sleep mode time interval of the current time; adjusting the target temperature and the wind level of the fresh air fan according to the specific sleep mode and the operation condition of the air conditioner; wherein the specific sleep modes comprise a noon sleep mode and a night sleep mode; the operation condition of the air conditioner comprises an independent fresh air opening mode, a synchronous air conditioner opening mode and a fresh air mode.
In a specific embodiment, a specific sleep mode is determined according to a sleep mode time interval in which the current time is, so that the target temperature and the wind level of the fresh air fan can be correspondingly adjusted according to different user requirements of a midday sleep mode and a night sleep mode; when the air conditioner and the fresh air mode are started synchronously, the target temperature and the wind gear of the fresh air fan need to be adjusted; when the new trend mode is opened alone, only need to adjust the windshield of new trend fan can.
Further, under the condition of synchronously starting the air conditioner and the fresh air mode, adjusting the target temperature and the fresh air fan wind gear according to the specific sleep mode and the operation condition of the air conditioner comprises the following steps: when the device is in a noon sleeping mode, controlling the target temperature to be a first target temperature, and operating the fresh air fan at a low wind gear; after the operation is carried out for a first preset time, the first target temperature is increased; when the device is in a night sleep mode, controlling the target temperature to be a first target temperature, and operating the fresh air fan at a low wind gear; after the operation is carried out for a second preset time, the first target temperature is increased; and after the operation lasts for the third time, the first target temperature is increased again, and the wind gear operation in the fresh air fan is controlled.
In a specific embodiment, under the condition that the air conditioner and the fresh air mode are synchronously started, when the sleep starting stage is reached, the noise can be reduced by controlling the operation of a fresh air wind gear and a low windshield, so that a user can conveniently sleep; the temperature is increased, so that the human body is easier to enter a deep sleep state from a shallow sleep state, and meanwhile, the human body enters the deep sleep state, the immunity is reduced, and the higher environmental temperature needs to be kept, so that the first target temperature is increased after the human body is in a lunch sleep mode and runs for a first preset time; when the mobile terminal is in a night sleep mode and runs for a second preset time, the first target temperature is increased; in order to increase the fresh air ventilation rate and reduce the content of CO2 in the room, when the room is in the night sleep mode and operates for a third time period, the first target temperature is increased again, and meanwhile, the fresh air fan is controlled to operate from a low wind shield to a medium wind shield.
Further, under the condition that the new trend mode is opened alone, according to concrete sleep mode and air conditioner operating condition adjustment target temperature and new trend fan grade include: when the device is in the noon sleeping mode, the fresh air fan is controlled to operate at a low wind gear; when the novel air conditioner is in the night sleep mode, the low wind gear of the novel air fan is controlled to operate, and after the novel air conditioner operates for the fourth time, the wind gear of the novel air fan is controlled to operate.
In a specific example, under the condition of independently starting the fresh air mode, the effect of reducing noise and facilitating sleep can be achieved by reducing the windshield, so that when the fresh air fan is in the noon sleep mode, the operation of the fresh air fan at a low wind gear is controlled; when the device is in a night sleep mode, the low wind gear of the fresh air fan is controlled to operate; after the operation for the fourth time period, in order to increase the fresh air ventilation rate and reduce the content of CO2 in the room, the fresh air fan is controlled to be adjusted from the low windshield operation to the medium windshield operation.
Further, when the air conditioner receives a sleep mode ending instruction or the current time is not in the sleep mode time interval, the air conditioner exits the sleep mode.
In one embodiment, if the air conditioner receives a sleep mode end command or the current time is not in the sleep mode time interval, the user requirement changes, and the air conditioner exits the sleep mode without creating a comfortable sleep environment.
[ second embodiment ]
A second embodiment of the present invention provides a fresh air conditioning system, which includes a fresh air processing system and an air conditioning system, wherein the fresh air conditioning system executes the sleep temperature control method according to any of the previous embodiments, and can achieve the same technical effects, and therefore, in order to avoid repetition, the description is omitted here.
In an embodiment, with reference to fig. 4, the fresh air processing system includes a fresh air intake duct and an indoor air duct 7 communicated with the fresh air intake duct, and the fresh air intake duct includes, for example: a filtration zone 15, a first temperature regulated zone 13, a second temperature regulated zone 11, and a fresh air mixing zone 8. The filtering area 15 comprises a fresh air inlet 1, a first temperature detection device 14 and a filter screen 2; the first temperature adjusting area 13 is provided with a first heating device 3, a first cooling device 4 and a second temperature detecting device 12; the second temperature adjusting area 11 is provided with a second heating device 5, a second cooling device 6 and a third temperature detecting device 10; the wind mixing area 8 is provided with an indoor wind guide 9 for opening or closing the indoor wind inlet. The first temperature regulation zone 13 communicates with said filtering zone 15; the second temperature adjusting area 11 is communicated with the first temperature adjusting area 13; the fresh air mixing area 8 is communicated with the second temperature adjusting area 11.
By arranging the filtering area 15, fresh air entering the fresh air inlet duct can be filtered, dedusted and decontaminated; by arranging the first temperature regulation area 13 and the second temperature regulation area 11, when the air conditioner is in heating operation, the fresh air can be heated by combining the first heating device 3 of the first temperature regulation area 13 and the second heating device 5 of the second temperature regulation area 11; when the air conditioner operates in a refrigerating mode, the fresh air can be cooled by combining the first cooling device 4 of the first temperature adjusting area 13 and the second cooling device 6 of the second temperature adjusting area 11; the problems that the comfort of a user is poor and the sleep quality is affected due to overlarge temperature difference between the fresh air temperature and the indoor environment temperature are solved; in addition, because the new trend air intake duct is provided with new trend mixing area 8, consequently can carry out temperature regulation to the new trend through the mode of mixing new trend and indoor wind.
For example, the user starts the sleep mode, detects the fresh air inlet temperature, low-temperature fresh air enters the filtering area 15 from a fresh air inlet, the low-temperature fresh air is filtered, dedusted and purified through HEPA, leaves the filtering area 15 and is primarily heated through the first auxiliary heater, enters the first heating area, is continuously heated to become medium-temperature fresh air, is secondarily heated through the second auxiliary heater, enters the second heating area, reaches the preset temperature, then enters the fresh air mixing area and is mixed with indoor air entering from the indoor air guide door, and enters the indoor air duct together after being mixed, and then maintains indoor good room temperature and noise within the preset range by adjusting the target temperature and the fresh air supply volume according to the operation time, so that the optimal sleep environment is provided.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A sleep temperature control method is characterized by comprising the following steps:
starting a sleep mode;
acquiring the temperature of fresh air;
controlling a first temperature adjusting device and a second temperature adjusting device to adjust the temperature of the fresh air according to the temperature of the fresh air; and/or
Controlling the mixing of fresh air and indoor air according to the temperature of the fresh air to regulate the temperature of the fresh air;
when the air conditioner is in heating operation, the first temperature adjusting device is a first heating device, and the second temperature adjusting device is a second heating device; when the air conditioner operates in a refrigerating mode, the first temperature adjusting device is a first cooling device, and the second temperature adjusting device is a second cooling device.
2. The sleep temperature control method according to claim 1, wherein a temperature adjusting device is controlled to adjust the temperature of the fresh air according to the temperature of the fresh air; and/or according to fresh air temperature control fresh air mixes with indoor wind and carries out temperature regulation to the fresh air include:
and controlling the on-off states of the first temperature adjusting device and the second temperature adjusting device and the on-off state of the indoor air guide component according to the relation between the fresh air temperature and the fresh air temperature threshold value.
3. The sleep temperature control method according to claim 1, wherein when an air conditioner is in heating operation, the temperature adjusting device is controlled according to the temperature of the fresh air to adjust the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include:
if T is less than or equal to T1, the first heating device is started, the second heating device is started, the first temperature adjusting area is controlled in a first temperature range, the second temperature adjusting area is controlled in a second temperature range, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously;
if T is more than T1 and less than or equal to T2, the first heating device is closed, the second heating device is started, the second temperature adjusting area is controlled in a third temperature range, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously;
if T is more than T2 and less than or equal to T3, the first heating device is closed, the second heating device is closed, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are synchronously started;
if T is more than T3, the first heating device is closed, the second heating device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
4. The sleep temperature control method according to claim 1, wherein when an air conditioner is in refrigeration operation, the temperature adjusting device is controlled according to the temperature of the fresh air to adjust the temperature of the fresh air; and/or according to the fresh air temperature control fresh air is mixed with indoor wind and carries out temperature regulation to the fresh air include:
if T is larger than or equal to T4, the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled to be in a fourth temperature interval, the second temperature adjusting area is controlled to be in a fifth temperature interval, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously;
if T4 is larger than or equal to T5, the first cooling device is started, the second cooling device is started, the first temperature adjusting area is controlled in a sixth temperature range, the second temperature adjusting area is controlled in a seventh temperature range, the indoor air guide piece is opened, fresh air and indoor air are controlled to be mixed, and an air conditioner and a fresh air mode are started synchronously;
if T5 is larger than T and is not less than T6, closing the first cooling device, opening the second cooling device, controlling the second temperature regulation area to be in an eighth temperature interval, opening the indoor air guide component, controlling the fresh air to be mixed with the indoor air, and synchronously opening an air conditioner and a fresh air mode;
if T is greater than T6, the first cooling device is closed, the second cooling device is closed, the indoor air guide piece is closed, and the fresh air mode is independently started.
5. The sleep temperature control method according to claim 1, further comprising:
determining a specific sleep mode according to a sleep mode time interval of the current time;
adjusting the target temperature and the wind level of the fresh air fan according to the specific sleep mode and the operation condition of the air conditioner;
wherein the specific sleep modes comprise a noon sleep mode and a night sleep mode; the operation condition of the air conditioner comprises an independent fresh air opening mode, a synchronous air conditioner opening mode and a fresh air mode.
6. The sleep temperature control method according to claim 5, wherein in case of synchronously turning on an air conditioner and a fresh air mode, adjusting the target temperature and the fresh air fan draft according to the specific sleep mode and the operation condition of the air conditioner comprises:
when the new air fan is in a noon sleeping mode, controlling the target temperature to be a first target temperature, and after the new air fan runs for a first preset time period at a low wind gear, improving the first target temperature;
when the air conditioner is in a night sleep mode, controlling the target temperature to be a first target temperature, and operating a fresh air fan at a low wind gear; after running for a second preset time, improving the first target temperature; and after the operation lasts for the third time, the first target temperature is increased again, and the wind gear operation in the fresh air fan is controlled.
7. The sleep temperature control method according to claim 5, wherein the adjusting the target temperature and the wind level of the fresh air fan according to the specific sleep mode and the operation condition of the air conditioner under the condition that the fresh air mode is independently started comprises:
when the device is in a noon sleeping mode, controlling the low wind gear of the fresh air fan to operate;
when the novel air conditioner is in a night sleep mode, the novel air conditioner controls the low wind gear of the novel air conditioner to operate, and after the novel air conditioner operates for the fourth time, the wind gear of the novel air conditioner is controlled to operate.
8. The sleep temperature control method according to claim 5, further comprising:
and when the air conditioner receives a sleep mode ending instruction or the current time is not in the sleep mode time interval, exiting the sleep mode.
9. A fresh air conditioning system, characterized in that the fresh air conditioning system comprises a fresh air processing system and an air conditioning system, and the fresh air conditioning system executes the sleep temperature control method according to any one of claims 1 to 8.
10. The fresh air conditioning system as claimed in claim 9, wherein the fresh air processing system comprises a fresh air intake duct and an indoor unit duct communicated with the fresh air intake duct, and the fresh air intake duct comprises:
the filtering area is provided with a first temperature detection device;
the first temperature adjusting area is communicated with the filtering area, and the first heating area comprises a first heating device and a first cooling device;
the second temperature adjusting area is communicated with the first temperature adjusting area and comprises a second heating device and a second cooling device;
the fresh air mixing area is communicated with the second temperature adjusting area, and the fresh air mixing area is provided with an indoor air guide piece used for opening or closing the indoor air inlet.
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