CN111536594B - Air conditioner, fresh air duct anti-freezing method thereof and storage medium - Google Patents

Air conditioner, fresh air duct anti-freezing method thereof and storage medium Download PDF

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Publication number
CN111536594B
CN111536594B CN202010406355.6A CN202010406355A CN111536594B CN 111536594 B CN111536594 B CN 111536594B CN 202010406355 A CN202010406355 A CN 202010406355A CN 111536594 B CN111536594 B CN 111536594B
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Prior art keywords
air
fresh air
indoor
fresh
fan
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CN111536594A (en
Inventor
曹磊
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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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
    • 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
    • F24F1/009—Indoor units, e.g. fan coil units characterised by heating arrangements
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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 invention discloses a method for preventing freezing of a fresh air duct of an air conditioner, wherein the air conditioner is provided with the fresh air duct, a fresh air fan and a fresh air inlet pipe connected with an air inlet of the fresh air duct, an indoor air return port is arranged at the position of the fresh air inlet pipe or the air inlet of the fresh air duct, and an air door is arranged on the indoor air return port; the method for preventing the fresh air duct of the air conditioner from freezing comprises the following steps: after the fresh air fan is started, acquiring the air temperature and the indoor dew point temperature in the fresh air duct; and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, opening the air door. The invention also discloses an air conditioner and a storage medium. The invention can effectively prevent the indoor air from freezing when the indoor air is contacted with the purifying device in the fresh air duct due to the fact that the temperature of fresh air entering the indoor space from the outdoor space is too low, and avoids the purifying effect from being influenced by the freezing of the purifying device.

Description

Air conditioner, fresh air duct anti-freezing method thereof and storage medium
Technical Field
The invention relates to the technical field of air conditioning, in particular to an air conditioner, an anti-freezing method of a fresh air duct of the air conditioner and a storage medium of the air conditioner.
Background
The air conditioners commonly used in the day ago comprise air conditioners, purifiers and the like, wherein the air conditioners and the purifiers regulate the indoor environment, the indoor environment is regulated through general circulation, the indoor environment is circulated for a long time, indoor carbon dioxide is easily excessive, therefore, a fresh air port and a fresh air channel are additionally arranged on some air conditioners, fresh air is introduced into the room from the fresh air port through the fresh air channel, and the freshness of the indoor air is increased. However, when the outdoor environment temperature at which the air conditioner is located is too low, too low fresh air enters the fresh air duct, the temperature of the purification device in the fresh air duct is reduced, and because the fresh air inlet pipe and the fresh air duct have an installation gap, indoor air enters the fresh air duct through the installation gap, and is easy to freeze on the purification device when contacting the surface of the purification device, and the purification effect is affected when the surface of the purification device freezes.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, a fresh air duct anti-freezing method and a storage medium thereof, and aims to solve the problems that when the air conditioner runs in a low-temperature environment, the fresh air function is started, the fresh air duct is easy to freeze, and the purification effect of a purification device of the fresh air duct is influenced.
In order to achieve the purpose, the invention provides a method for preventing the fresh air duct of an air conditioner from freezing, wherein the air conditioner is provided with the fresh air duct, a fresh air fan and a fresh air inlet pipe connected with an air inlet of the fresh air duct, an indoor air return port is arranged at the position of the fresh air inlet pipe or the air inlet of the fresh air duct, and an air door is arranged on the indoor air return port; the method for preventing the fresh air duct of the air conditioner from freezing comprises the following steps:
after the fresh air fan is started, acquiring the air temperature and the indoor dew point temperature in the fresh air duct;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, opening the air door.
Optionally, an indoor air outlet which forms air convection with the indoor air return inlet is further arranged on the fresh air inlet pipe or the fresh air duct, a fresh air heat exchange pipe and a drainage fan are further arranged on the air conditioner, wherein an air inlet of the fresh air heat exchange pipe is an outdoor fresh air inlet, an air outlet of the fresh air heat exchange pipe is communicated with the fresh air duct, and the drainage fan is arranged at the indoor air outlet; after the step of opening the air door, the method for preventing the fresh air duct of the air conditioner from freezing further comprises the following steps:
and starting the drainage fan.
Optionally, after the step of opening the damper, the method further comprises:
after a first preset time interval, acquiring the air temperature and the indoor dew point temperature;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, executing the step of starting the drainage fan.
Optionally, after the steps of opening the damper and starting the draught fan, the method further includes:
after a second preset time interval, acquiring the air temperature and the indoor dew point temperature;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, increasing the rotating speed of the drainage fan and/or reducing the rotating speed of the fresh air fan.
Optionally, after the step of obtaining the air temperature and the indoor dew point temperature, the method further includes:
acquiring the current rotating speed of the fresh air fan when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value;
when the current rotating speed is a preset rotating speed, controlling the fresh air fan to stop rotating and/or outputting fault alarm information;
and when the current rotating speed is greater than the preset rotating speed, executing the step of reducing the rotating speed of the fresh air fan.
Optionally, after the step of reducing the rotation speed of the fresh air fan, the method further includes:
after a third preset time interval, acquiring the air temperature and the indoor dew point temperature;
and increasing the rotating speed of the fresh air fan when the difference value between the indoor dew point temperature and the air temperature is smaller than the first preset threshold value.
Optionally, the step of increasing the rotation speed of the fresh air fan includes:
acquiring indoor air parameters of an air conditioner;
determining a target fresh air volume according to the indoor air parameters;
determining a target rotating speed of the fresh air fan according to the target fresh air volume;
and increasing the fresh air fan according to the target rotating speed.
The invention also provides an air conditioner, which is provided with a fresh air duct, a fresh air fan and a fresh air inlet connected with the air inlet of the fresh air duct, wherein indoor return air is arranged at the fresh air inlet or the air inlet of the fresh air duct, and an air door is arranged on the indoor return air; the air conditioner also comprises a memory, a processor and a fresh air duct anti-freezing control program which is stored in the memory and can run on the processor, wherein the fresh air fan and the air door are both connected with the processor, and the fresh air duct anti-freezing control program is executed by the processor to realize the steps of the air conditioner fresh air duct anti-freezing method.
Optionally, the new trend air-supply line perhaps still be equipped with on the new trend wind channel with indoor return air inlet forms the indoor air outlet of air convection, still be equipped with new trend heat exchange tube and drainage fan on the air conditioner, wherein, the air intake of new trend heat exchange tube is outdoor new trend air intake, the air outlet of new trend heat exchange tube with the new trend wind channel switches on, drainage fan sets up indoor air outlet department, will indoor wind follow when drainage fan rotates the new trend wind channel is introduced to indoor return air inlet perhaps in the new trend air-supply line, with follow after the new trend heat exchange tube heat exchange indoor air outlet blows off.
Optionally, the air conditioner is an air conditioner, the air conditioner further comprises a heat exchange air duct, the heat exchange air duct comprises a heat exchange air return opening and a heat exchange air outlet, a heat exchange assembly is arranged between the heat exchange air return opening and the heat exchange air outlet, and an air guide pipeline is arranged between the heat exchange air return opening and the indoor air outlet so as to convey air after heat exchange with the fresh air heat exchange pipe into the heat exchange air duct.
In addition, the invention also provides a storage medium, wherein the storage medium stores a fresh air duct anti-freezing control program, and the fresh air duct anti-freezing control program realizes the steps of the fresh air duct anti-freezing method of the air conditioner when being executed by the processor.
The invention provides an air conditioner and a fresh air duct anti-freezing method and a storage medium thereof, an indoor return air inlet is arranged on a fresh air duct of the air conditioner or a fresh air inlet pipe connected with an air inlet of the fresh air duct, an air door is arranged at the indoor return air inlet, if the air conditioner runs in a low-temperature environment and a fresh air function is started, if the difference between the indoor dew point temperature and the outdoor air temperature is more than or equal to a preset threshold value, the fresh air duct or the fresh air inlet pipe is communicated with the indoor by opening the air door, the indoor air is blown into the fresh air duct or the fresh air inlet pipe from the indoor return air inlet under the action of a fresh air fan, the temperature of the air entering the fresh air duct is raised due to the indoor return air being higher than the outdoor temperature, when the temperature of the air entering the fresh air duct is close to the indoor dew point temperature, the indoor air is directly contacted with a purifying device in the fresh air duct and cannot be frozen, the temperature of the purifying device for the fresh air duct can be effectively prevented from being reduced when the temperature of the fresh air entering the room is too low, and then the indoor air is frozen on the purifying device when contacting with the purifying device, so that the purifying effect of the purifying device is prevented from being influenced.
Drawings
FIG. 1 is a schematic diagram of a hardware architecture of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of an air conditioner to which the method for preventing freezing of a fresh air duct of the air conditioner is applied;
FIG. 3 is a schematic diagram of the internal structure of an embodiment of the part A in FIG. 2;
FIG. 4 is a schematic view of the internal structure of another embodiment of the part A in FIG. 2;
FIG. 5 is a schematic structural diagram of another embodiment of an air conditioner to which the method for preventing freezing of a fresh air duct of the air conditioner according to the present invention is applied;
FIG. 6 is a schematic flow chart illustrating a method for preventing freezing of a fresh air duct of an air conditioner according to a first embodiment of the present invention;
FIG. 7 is a schematic flow chart illustrating a method for preventing freezing of a fresh air duct of an air conditioner according to a second embodiment of the present invention;
FIG. 8 is a schematic flow chart illustrating a method for preventing freezing of a fresh air duct of an air conditioner according to a third embodiment of the present invention;
FIG. 9 is a schematic flow chart illustrating a method for preventing freezing in a fresh air duct of an air conditioner according to a fourth embodiment of the present invention.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
1 Air conditioner 11 Shell body
12 Fresh air duct 13 Fresh air fan
14 Fresh air inlet pipe 15 Purifying device
16 Temperature sensor 17 Fresh air heat exchange pipe
18 Indoor return air inlet 19 Air door
20 Indoor air outlet 21 Heat exchange air duct
22 Heat exchange assembly 23 Draught pipeline
24 Drainage fan
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: the air conditioner is provided with a fresh air duct, a fresh air fan and a fresh air inlet pipe connected with an air inlet of the fresh air duct, an indoor return air inlet is formed in the fresh air inlet pipe or the air inlet of the fresh air duct, and an air door is arranged on the indoor return air inlet; the method for preventing the fresh air duct of the air conditioner from freezing comprises the following steps:
after the fresh air fan is started, acquiring the air temperature in the fresh air duct;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, opening the air door.
As an implementation manner, a hardware environment architecture related to the method for preventing freezing of the fresh air duct of the air conditioner may be as shown in fig. 1.
The air conditioner related to the scheme of the embodiment of the invention has the functions of refrigeration and heating, and the air conditioner runs the refrigeration function in the environment with higher temperature and runs the heating function in the environment with lower temperature.
Specifically, the air conditioner includes: a processor 101, e.g. a CPU, a memory 102, a communication bus 103. Wherein a communication bus 103 is used for enabling the connection communication between these components. The processor 102 is used for calling an application program to perform functions such as cooling and heating.
The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory).
The air conditioner related to the embodiment of the invention also has a fresh air function, and specifically, referring to fig. 2, the air conditioner 1 is provided with a fresh air duct 12, a fresh air fan 13 and a fresh air inlet pipe 14 connected with an air inlet of the fresh air duct 12. Particularly, new trend wind channel 12 sets up in the casing 11 of air conditioner 1, new trend fan 13 sets up in the new trend wind channel 12, new trend air-supply line 14 sets up on the air conditioner 1, for example new trend air-supply line 14 one end with the air intake connection in new trend wind channel 12, the other end is used for extending to outdoors, when new trend fan 13 was opened, through new trend air-supply line 14 introduces outdoor new trend wind channel 12, and then the entering is indoor to the realization is to indoor new trend function of introducing.
It should be noted that, a purification device 15 is further disposed in the fresh air duct 12 of the air conditioner 1, and the purification device 15 is used for purifying fresh air entering from the outdoor, so as to prevent the quality of the indoor environment from being affected by the outdoor fresh air. The purification device 15 includes, but is not limited to, an anion purification component, a disinfection and sterilization component, a filter screen, etc.
It can be understood that, based on the fact that the air conditioner 1 according to the embodiment of the present invention can be applied to the area with the relatively low environmental temperature, in order to prevent the surface temperature of the purifying device 15 in the fresh air duct 12 from being reduced by the low temperature air after the relatively low temperature air enters the fresh air duct 12, because the installation gap exists between the fresh air inlet pipe 14 and the fresh air duct 12, if the indoor air enters the fresh air duct 12 from the installation gap and contacts with the purifying device 15 with the relatively low surface temperature, the surface of the purifying device 15 is frozen, and the purifying effect of the purifying device 15 is affected, the air conditioner 1 according to the embodiment of the present invention uses the indoor return air to heat the air temperature in the fresh air duct 12, so as to achieve the anti-freezing effect.
The air conditioner according to the embodiment of the present invention adopts the indoor return air to heat the air temperature in the fresh air duct 12, which includes but is not limited to the following three ways:
firstly, referring to fig. 3, an indoor air return opening 18 is arranged at an air inlet of the fresh air inlet pipe 14 or the fresh air duct 12, an air door 19 is arranged on the indoor air return opening 18, the air door 19 includes a driver (not labeled in the figure), the driver is connected with the processor 101, the processor 101 controls the driver to drive the air door 19 to move so as to open or close the indoor air return opening 18, an indoor air return opening 18 is arranged on the fresh air inlet pipe 14 or the fresh air duct 12 of the air conditioner 1, the air door 19 is arranged at the indoor air return opening 18, indoor air can be introduced into the fresh air duct 12 or the fresh air inlet pipe 14, when the air conditioner 1 heats in a low temperature environment, the indoor air temperature is far higher than the outdoor air temperature, at this time, the indoor air is introduced into the fresh air inlet pipe 14 or the fresh air duct 12 through the indoor air return opening 18, the indoor air and the outdoor fresh air are mixed to heat, the temperature in the fresh air duct 12 is increased, the temperature of the purifying device 15 in the fresh air duct 12 is further increased, and the anti-freezing effect is achieved.
Secondly, referring to fig. 4, an indoor air outlet 20 forming air convection with the indoor air return inlet 18 is further disposed on the fresh air inlet pipe 14 or the fresh air duct 12, and the air conditioner is further provided with a fresh air heat exchange pipe 17 and a drainage fan 24, wherein an air inlet of the fresh air heat exchange pipe 17 is an outdoor fresh air inlet, an air outlet of the fresh air heat exchange pipe 14 is communicated with the fresh air duct 12, and the drainage fan 24 is disposed at the indoor air outlet 20. When the air door 19 of the indoor air return opening 18 is opened, air convection between the indoor air return opening 18 and the indoor air outlet 20 is carried out, indoor air enters the fresh air inlet pipe 14 or the fresh air duct 12 from the indoor air return opening 18 and then flows back to the indoor from the indoor air outlet 20, indoor air is guided into the fresh air inlet pipe 14 or the fresh air duct 12, and because the indoor air temperature is higher than the outdoor fresh air temperature, the outdoor fresh air temperature entering the fresh air duct 12 can be effectively improved when the indoor air is guided into the fresh air inlet pipe 14 or the fresh air duct 12, so that the anti-freezing effect is achieved. And the air convection of the indoor air return opening 18 and the indoor air outlet 20 circularly guides high-temperature gas to the fresh air inlet pipe 14 or the fresh air duct 12, the temperature of fresh air in the fresh air inlet pipe 14 or the fresh air duct 12 is continuously raised, and the anti-freezing effect is better.
Specifically, when the fresh air heat exchange tube 17 is arranged in the fresh air inlet tube 14, the air inlet of the fresh air heat exchange tube 17 is communicated with the air inlet of the fresh air inlet tube 14, the air outlet of the fresh air inlet tube 14 is butted with the fresh air duct 12, that is, outdoor fresh air enters from the air inlet of the fresh air heat exchange tube 17 and is blown to the fresh air duct 12 through the fresh air heat exchange tube 17, and the air inlet of the fresh air heat exchange tube 17 becomes the outdoor fresh air inlet of the air conditioner. Set up in the new trend wind channel 12 during the new trend heat exchange tube 17, the air intake of new trend heat exchange tube 17 extends to the air intake department in new trend wind channel 12, with the butt joint of new trend air-supply line 14, the air outlet of new trend heat exchange tube 17 is located in the new trend wind channel 12, the orientation purifier 15 in the new trend wind channel 12. Outdoor fresh air enters from the fresh air inlet pipe 14, enters the fresh air heat exchange pipe 17 towards the air inlet of the fresh air heat exchange pipe 17, is blown out from the air outlet of the fresh air heat exchange pipe 17 towards the air outlet of the fresh air duct 12, and is blown out from the purifying device 15 in the fresh air duct 12. It can be understood that the setting positions of the indoor air return opening 18 and the indoor air outlet 20 correspond to the setting positions of the fresh air heat exchange tube 17 one by one, if the fresh air heat exchange tube 17 is arranged in the fresh air inlet tube 14, the indoor air return opening 18 and the indoor air outlet 20 are also arranged in the fresh air inlet tube 14, and if the fresh air heat exchange tube 17 is arranged in the fresh air duct 12, the indoor air return opening 18 and the indoor air outlet 20 are also arranged in the fresh air duct 12. And the fresh air heat exchange pipe 17 is positioned in a convection space between the indoor air return inlet 18 and the indoor air outlet 20.
It can be understood that, in order to increase the contact time between the indoor air guided from the indoor air return opening 18 to the fresh air inlet pipe 14 or the fresh air duct 12 and the fresh air in the fresh air inlet pipe 14 or the fresh air duct 12 and improve the heating effect of the fresh air, the indoor air return opening 18 and the indoor air outlet 20 are arranged in a staggered manner so as to increase the flowing time of the convection air between the indoor air return opening 18 and the indoor air outlet 20.
Thirdly, referring to 5, the air conditioner 1 further comprises a heat exchange air duct 21, the heat exchange air duct 21 comprises a heat exchange air return opening and a heat exchange air outlet, a heat exchange assembly 22 is arranged between the heat exchange air return opening and the heat exchange air outlet, and the air conditioner 1 realizes heat exchange of indoor air through heat exchange of the heat exchange assembly 21. Optionally, when the air conditioner 1 operates in a heating mode and the fresh air function is turned on, if the indoor air return port 18 is turned on, the air in the indoor air outlet 20 flows out when the air guide fan 24 is turned on, since the air guide fan 24 guides the indoor air from the indoor air return port 18 into the fresh air inlet pipe 14 or the fresh air duct 12, the air guide fan exchanges heat with the fresh air heat exchange pipe 17 in the fresh air inlet pipe 14 or the fresh air duct 12, since the fresh air flows in the fresh air heat exchange pipe 17, the fresh air heat exchange pipe 17 absorbs the heat of the indoor air, so that the temperature of the outdoor fresh air rises, and after the indoor air entering from the indoor air return port 18 is absorbed by the fresh air heat exchange pipe 17, the temperature is reduced, and at this time, if the indoor air is directly discharged into the room from the indoor air outlet 20, the indoor temperature is affected, the heating effect of the air conditioner 1 is reduced, and the user experience is affected, therefore, an air guide pipeline is arranged between the heat exchange air return opening and the indoor air outlet 20, so that air subjected to heat exchange with the fresh air heat exchange pipe 17 is conveyed into the heat exchange air duct 21 from the heat exchange air return opening and is heated by the heat exchange assembly 22 in the heat exchange air duct 21 and then conveyed indoors, and the influence on the comfort level of the indoor environment in the anti-freezing process of the fresh air duct 12 can be avoided.
Further, this embodiment is in the air outlet of new trend wind channel 12 or be close to air outlet one side and set up temperature sensor 15, adopt temperature sensor 15 gathers the air temperature in new trend wind channel 12 before air door 19 is not opened, the air temperature in new trend wind channel 12 is the same with outdoor ambient temperature, works as after air door 19 is opened, the air temperature in new trend wind channel 12 is the air temperature after the heating, if this moment if the air temperature is less with the dew point temperature of indoor air, then can be according to demand control air door 19 closes.
Based on the air conditioner, when the air conditioner operates to heat and starts a fresh air function, the processor 101 of the air conditioner calls a fresh air duct anti-freezing control program from the memory 102, and then executes a fresh air duct anti-freezing process.
It can be understood that the execution program of the method for preventing freezing of the fresh air duct of the air conditioner in the embodiment may be stored in a storage medium as an independent program; the processor 101 of the air conditioner may be configured to call the fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
after the fresh air fan is started, acquiring the air temperature and the indoor dew point temperature in the fresh air duct;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, opening the air door.
In an embodiment, the processor 101 may be configured to call a fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
starting the drainage fan;
in an embodiment, the processor 101 may be configured to call a fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
after a first preset time interval, acquiring the air temperature and the indoor dew point temperature;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, executing the step of starting the drainage fan.
In an embodiment, the processor 101 may be configured to call a fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
after a second preset time interval, acquiring the air temperature and the indoor dew point temperature;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, increasing the rotating speed of the drainage fan and/or reducing the rotating speed of the fresh air fan.
In an embodiment, the processor 101 may be configured to call a fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
acquiring the current rotating speed of the fresh air fan when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value;
when the current rotating speed is a preset rotating speed, controlling the fresh air fan to stop rotating and/or outputting fault alarm information;
and when the current rotating speed is greater than the preset rotating speed, executing the step of reducing the rotating speed of the fresh air fan.
In an embodiment, the processor 101 may be configured to call a fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
after a third preset time interval, acquiring the air temperature and the indoor dew point temperature;
and increasing the rotating speed of the fresh air fan when the difference value between the indoor dew point temperature and the air temperature is smaller than the first preset threshold value.
In an embodiment, the processor 101 may be configured to call a fresh air duct anti-freezing control program stored in the memory 102, and perform the following operations:
acquiring indoor air parameters of an air conditioner;
determining a target fresh air volume according to the indoor air parameters;
determining a target rotating speed of the fresh air fan according to the target fresh air volume;
and increasing the fresh air fan according to the target rotating speed.
Based on the hardware framework of the air conditioner, the invention provides various embodiments of the anti-freezing method for the fresh air duct of the air conditioner.
Referring to fig. 6, fig. 6 is a first embodiment of a method for preventing freezing of a fresh air duct of an air conditioner, in which an applied air conditioner is provided with a fresh air duct, a fresh air fan and a fresh air inlet pipe connected to an air inlet of the fresh air duct, an indoor air return port is provided at the air inlet of the fresh air inlet pipe or the fresh air duct, and an air door is provided at the indoor air return port; the method for preventing the fresh air duct of the air conditioner from freezing comprises the following steps:
step S10, after the fresh air fan is started, acquiring the air temperature on the fresh air duct and the indoor dew point temperature;
and step S20, when the difference between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, opening the air door.
In this embodiment, the execution main body is an air conditioner, or may be a control terminal of the air conditioner, such as a server or a central controller, and the control terminal is connected to the air conditioner wirelessly or by wire, so as to control the air conditioner to execute corresponding operations.
The present embodiment is described by taking an example in which the air conditioner operates in a low temperature environment, such as a heating mode. After the air conditioner starts a heating mode, detecting indoor air parameters in real time or at regular time, wherein the indoor air parameters comprise but are not limited to carbon dioxide concentration; when the indoor air parameter is larger than the preset threshold value, the indoor carbon dioxide concentration is over-high, and in order to keep the body of a user healthy, the fresh air fan is started to introduce fresh air from the outdoor to the indoor.
Open behind the new trend fan prevent that outdoor air temperature from leading to the purifier in the new trend wind channel to freeze when crossing excessively easily, and then influence the purifier's in the new trend wind channel purifying effect. Consequently this application sets up the anti-icing mode in new trend wind channel for when the air conditioner satisfies the condition of freezing, start the anti-icing mode, prevent that the new trend wind channel of air conditioner from freezing.
Specifically, a temperature sensor is arranged in the fresh air duct, the air temperature on the fresh air duct is acquired in real time or at regular time, and an indoor temperature sensor and an indoor humidity sensor are also arranged indoors and used for respectively acquiring the indoor temperature and the indoor humidity; and then obtaining the indoor dew point temperature according to the indoor temperature and the indoor humidity. Setting the icing judgment condition of the fresh air duct of the air conditioner: when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, the indoor dew point temperature is higher than the outdoor air temperature, and the indoor air is easy to freeze on the surface of a purification device in the fresh air duct or the outer surface of a fresh air inlet pipeline. Control this moment the air door is opened to arrive from indoor drainage indoor air in new trend air-supply line or the new trend wind channel, indoor high temperature air mixes the fever with outdoor new trend after, and indoor high temperature air heats outdoor new trend, increases the temperature of indoor new trend, thereby makes the new trend that gets into from outdoor reentrant after indoor high temperature air heating the new trend wind channel improves the air temperature who gets into the new trend wind channel, so, purifier in the new trend wind channel is difficult for freezing for the air conditioner is suitable for and uses the new trend function under low temperature environment, improves the suitability of air conditioner.
It can be understood that, in this embodiment, the first preset threshold may be a temperature difference range, for example, from-5 ℃ to 0 ℃, and when the difference between the indoor dew point temperature and the air temperature is lower than the temperature difference range, the air is very easy to freeze, so that before the difference between the indoor dew point temperature and the air temperature is not lower than the temperature value range, the air in the fresh air duct is mixed with heat in advance to achieve the anti-freezing control of the fresh air duct.
It should be noted that the indoor return air inlet in this embodiment is preferably disposed on the fresh air inlet duct, so that the indoor return air is fully mixed in the fresh air inlet duct before entering the fresh air duct, and the indoor return air directly entering the fresh air duct is placed to directly contact the purification device in the fresh air duct.
In the embodiment, if the air conditioner operates in a low-temperature environment and the fresh air function is started, if the difference between the indoor dew point temperature and the outdoor air temperature is greater than or equal to a preset threshold value, the fresh air duct or the fresh air inlet pipe is communicated with the indoor space by opening the air door, indoor air is blown into the fresh air duct or the fresh air inlet pipe from the indoor return air port under the action of the fresh air fan, the indoor return air enables the temperature of the air entering the fresh air duct to be increased, and when the temperature of the air entering the fresh air duct approaches to the indoor dew point temperature, the indoor air directly contacts with the purifying device in the fresh air duct and cannot be frozen, the temperature of the purifying device for the fresh air duct can be effectively prevented from being reduced when the temperature of the fresh air entering the room is too low, and then the indoor air is frozen on the purifying device when contacting with the purifying device, so that the purifying effect of the purifying device is prevented from being influenced.
Referring to fig. 7, fig. 7 is a second embodiment of the method for preventing freezing of a fresh air duct of an air conditioner based on the first embodiment, in this embodiment, an indoor air outlet forming air convection with an indoor air return inlet is further disposed on the fresh air inlet pipe or the fresh air duct, a fresh air heat exchange pipe and a flow guide fan are further disposed on the air conditioner, wherein an air inlet of the fresh air heat exchange pipe is an outdoor fresh air inlet, an air outlet of the fresh air heat exchange pipe is communicated with the fresh air duct, and the flow guide fan is disposed at the indoor air outlet; after the step of opening the air door is executed, the method for preventing the fresh air duct of the air conditioner from freezing further comprises the following steps:
step S30, starting the drainage fan;
or, after the step of opening the damper, the method further comprises;
step S40, after a first preset time interval, acquiring the air temperature and the indoor dew point temperature;
and step S50, when the difference between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, executing the step of starting the draught fan.
Outdoor new trend follow the new trend air intake gets into the back, passes through the new trend heat exchange tube flow direction the new trend wind channel, and then flow direction is indoor. The fresh air heat exchange tube is located between the indoor air return opening and the indoor air outlet, indoor air enters from the indoor air return opening and flows to the front of the indoor air outlet, the indoor air passes through the surface of the fresh air heat exchange tube and fully contacts with the surface of the fresh air heat exchange tube, and heat exchange with the fresh air heat exchange tube is realized.
Wherein, can open start in the time of the air door drainage fan also can open behind the air door, carry out the heat transfer through the convection current of indoor return air inlet and indoor air outlet, after first preset time interval, if indoor dew point temperature with the difference of air temperature still is greater than or equal to first predetermined threshold value, restart drainage fan increases indoor air flow velocity, improves the heat transfer effect of new trend heat exchange tube.
This embodiment is through the new trend air-supply line at the air conditioner perhaps set up new trend pipe heat pipe in the new trend wind channel, adopt the new trend heat exchange tube introduces the new trend to indoor, and set up indoor return air inlet and indoor air outlet in new trend air-supply line or the new trend wind channel at new trend heat exchange tube place, indoor return air inlet and indoor air outlet form the room air convection current, and when the room air got into in new trend air-supply line or the new trend wind channel through indoor return air inlet, with new trend heat exchange tube contact, because the new trend is followed when the new trend heat exchange tube entered, with the temperature reduction of new trend heat exchange tube, the room air with when new trend heat exchange tube contact, produced the heat transfer process, the room air with new trend heat exchange tube heat transfer, and then the new trend of new trend heat exchange tube heating inside for the new trend temperature risees. This embodiment utilizes indoor return air indirect heating new trend, can keep the new freshness of outdoor new trend, does not receive the influence of room air.
Referring to fig. 8, fig. 8 is a third embodiment of a method for preventing freezing of a fresh air duct of an air conditioner based on the second embodiment, and after the step of starting the air-guiding fan, the method further includes:
step S60, after a second preset time interval, acquiring the air temperature and the indoor dew point temperature;
and step S70, when the difference between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, increasing the rotating speed of the drainage fan and/or reducing the rotating speed of the fresh air fan.
The air conditioner controls the air door to be opened, and after a first preset time interval is continuously opened, the air temperature in the fresh air duct is detected at the moment, whether the difference value between the indoor dew point temperature and the air temperature is still larger than or equal to a first preset threshold value or not is judged, if yes, the rotating speed of the drainage fan is increased or reduced, or the rotating speed of the drainage fan is increased and the rotating speed of the fresh air fan is reduced. The rotating speed of the drainage fan is increased, the convection speed of indoor return air can be increased, the fresh air heat exchange tube in the fresh air inlet tube or the fresh air duct continuously exchanges heat with the indoor return air in a circulating way, and the heat exchange effect is improved; reduce the rotational speed of new trend fan can reduce the new trend intake to and reduce new trend air inlet speed, the new trend intake is few, and speed is slow, can be so that air and heating device fully contact, and increase to contact for a long time, improve heating temperature.
In this embodiment, when the difference between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold, the rotating speed of the drainage fan is selectively increased, or the rotating speed of the fresh air fan is selectively decreased, which may be different according to different current operating environments of the air conditioner.
For example, if the current rotating speed of the flow inducing fan is less than the rated rotating speed, that is, the flow inducing fan does not reach the maximum rotating speed of the flow inducing fan, the rotating speed of the flow inducing fan can be preferentially selected to be increased, and the air temperature is increased; if the current rotating speed of the drainage fan reaches the rated rotating speed, the rotating speed of the fresh air fan can be reduced. The rotating speed of the drainage fan is preferentially increased, so that the air inlet volume of the indoor fresh air can be ensured, and a better anti-freezing effect is achieved; and reduce during the rotational speed of new trend fan, new trend intake and new trend air inlet speed diminish, can reduce the new amount of wind with indoor return air mixed heat, perhaps the new amount of wind in the new trend heat exchange tube reduces, can improve the heat exchange efficiency of indoor return air and new trend heat exchange tube, and the back is diminished to new trend air inlet speed, can make the contact of outdoor new trend and new trend heat exchange tube more abundant, and then makes the heat transfer effect of outdoor new trend better, improves the temperature of new trend.
Or, the rotating speed of the fresh air fan is determined to be reduced or the rotating speed of the drainage fan is determined to be increased according to the indoor air parameter. For example, when the indoor air parameter where the air conditioner is located is less than or equal to the preset threshold, it indicates that the indoor carbon dioxide concentration is low, and at this time, the fresh air volume is low and will not affect the indoor environment, and in order to reduce the power consumption of the heating device, the rotation speed of the fresh air fan can be reduced, the fresh air intake volume is reduced, and further, the fresh air temperature is increased.
Further, if the air conditioner controls the rotation speed of the fresh air fan to decrease, it needs to be determined whether the current rotation speed of the fresh air fan is a low rotation speed, and when the current rotation speed of the fresh air fan is prevented from being continuously decreased, the effect that the fresh air volume is smaller than a certain value and the indoor air volume cannot be updated is avoided, so that the method further comprises the following steps of:
when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, acquiring the current rotating speed of the fresh air fan;
when the current rotating speed reaches a preset rotating speed, controlling the fresh air fan to stop rotating and/or outputting fault alarm information;
and when the current rotating speed is greater than the preset rotating speed, executing the step of reducing the rotating speed of the fresh air fan.
The preset rotating speed can be the minimum rotating speed allowed when the set fresh air function is started; the rotating speed corresponding to the minimum windshield of the fresh air fan can also be set. When the current rotating speed of the fresh air fan reaches the preset rotating speed, the fresh air fan cannot be reduced any more, if the heating device reaches the rated power at the moment and the air temperature is still less than or equal to the freezing critical temperature, the fresh air function is not suitable to be operated at the moment, the fresh air fan is directly controlled to stop rotating, or fault alarm information is output, and a user is prompted that the fresh air function is not suitable to be started under the current environment.
In this embodiment, the temperature of the air in the fresh air duct is monitored in real time, and if the requirement of the anti-freezing temperature is not met, the heating temperature is increased by increasing the rotation speed of the drainage fan or reducing the rotation speed of the fresh air fan, so as to meet the requirement of the anti-freezing. And one mode is determined and selected to improve the air temperature according to the current running condition of the air conditioner, and the flexibility of the air conditioner control is improved through multiple heat mixing modes.
Referring to fig. 9, fig. 9 is a fourth embodiment of a method for preventing freezing of a fresh air duct of an air conditioner based on the third embodiment, where after the step of reducing the rotation speed of the fresh air fan, the method further includes:
step S80, after a third preset time interval, acquiring the air temperature and the indoor dew point temperature;
and step S90, increasing the rotating speed of the fresh air fan when the difference between the indoor dew point temperature and the air temperature is smaller than the first preset threshold value.
This embodiment is based on reducing behind the rotational speed of new trend fan, to the control of new trend fan, if reduce after the rotational speed of new trend fan, detect indoor dew point temperature with the difference of air temperature is less than first preset threshold value, also promptly the difference between the air temperature in the new trend wind channel and the indoor dew point temperature is less, and when the air in the new trend wind channel acted on purifier this moment, indoor air also can not produce the frost with purifier's surface contact, has played the effect of preventing frostbite, can select the rotational speed that increases new trend fan this moment to resume indoor new trend intake.
Furthermore, in order to prevent the influence of the increase of the rotation speed of the fresh air fan on the fresh air temperature, the difference value between the indoor dew point temperature and the air temperature is smaller than the first preset threshold value, and the rotation speed of the fresh air fan is increased after the air temperature continuously runs for a third preset time interval. And after the air conditioner continuously operates for a fourth preset time interval according to the current operation parameters, increasing the rotating speed of the fresh air fan so as to recover the indoor fresh air inlet volume. Wherein, increasing the rotation speed of the fresh air fan can be directly restoring to the rotation speed before reducing the rotation speed of the fresh air fan; the rotating speed of the fresh air fan can be increased, and the increment of the fresh air fan can be determined according to the indoor current environment requirement, so that indoor air parameters can be quickly recovered, and the customer requirement is met.
Specifically, before the step of increasing the rotation speed of the fresh air fan, the method further comprises:
acquiring indoor air parameters of an air conditioner;
determining a target fresh air volume according to the indoor air parameters;
determining a target rotating speed of the fresh air fan according to the target fresh air volume;
and increasing the fresh air fan according to the target rotating speed.
The indoor air parameter includes, but is not limited to, carbon dioxide concentration. When the difference value between the indoor dew point temperature and the air temperature is smaller than the first preset threshold value and a fourth preset time interval is continued, whether the indoor carbon dioxide concentration is larger than the preset threshold value or not is judged, if yes, the fresh air volume (target fresh air volume) needing to be introduced is calculated according to the carbon dioxide concentration, the target rotating speed of the fresh air fan is calculated according to the target fresh air volume, and then the fresh air fan is increased according to the target rotating speed, so that the target fresh air volume is introduced indoors.
Specifically, the target fresh air volume is calculated according to the indoor air parameters and the indoor size, and then the target rotating speed is determined according to the target fresh air volume and the operating time, so that the rotating speed of the fresh air fan is increased.
In this embodiment, the difference between the indoor dew point temperature and the air temperature is smaller than the first preset threshold, and after the fourth preset time interval is continued, the rotation speed of the fresh air fan is timely adjusted according to the indoor demand, so that fresh air in the indoor environment is kept while the fresh air is prevented from freezing.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A fresh air duct anti-freezing method for an air conditioner is characterized in that a fresh air duct, a fresh air fan and a fresh air inlet pipe connected with an air inlet of the fresh air duct are arranged on the air conditioner, an indoor air return port is arranged at the position of the air inlet of the fresh air inlet pipe or the fresh air duct, an air door is arranged on the indoor air return port, an indoor air outlet forming air convection with the indoor air return port is further arranged on the fresh air inlet pipe or the fresh air duct, a fresh air heat exchange pipe and a drainage fan are further arranged on the air conditioner, wherein the air inlet of the fresh air heat exchange pipe is an outdoor fresh air inlet, the air outlet of the fresh air heat exchange pipe is communicated with the fresh air duct, and the drainage fan is arranged at the position of the indoor air outlet; the method for preventing the fresh air duct of the air conditioner from freezing comprises the following steps:
after the fresh air fan is started, acquiring the air temperature and the indoor dew point temperature in the fresh air duct;
when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, opening the air door;
and starting the drainage fan.
2. The method for preventing freezing of a fresh air duct of an air conditioner as claimed in claim 1, wherein said step of opening said damper further comprises, after said step of opening said damper:
after a first preset time interval, acquiring the air temperature and the indoor dew point temperature;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, executing the step of starting the drainage fan.
3. The method for preventing the fresh air duct of the air conditioner from freezing as claimed in claim 1 or 2, wherein after the step of starting the draught fan, the method further comprises:
after a second preset time interval, acquiring the air temperature and the indoor dew point temperature;
and when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, increasing the rotating speed of the drainage fan and/or reducing the rotating speed of the fresh air fan.
4. The method as claimed in claim 3, wherein said step of obtaining said air temperature and said indoor dew point temperature is followed by the steps of:
when the difference value between the indoor dew point temperature and the air temperature is greater than or equal to a first preset threshold value, acquiring the current rotating speed of the fresh air fan;
when the current rotating speed is a preset rotating speed, controlling the fresh air fan to stop rotating and/or outputting fault alarm information;
and when the current rotating speed is greater than the preset rotating speed, executing the step of reducing the rotating speed of the fresh air fan.
5. The method for preventing freezing of a fresh air duct of an air conditioner as claimed in claim 4, wherein after the step of reducing the rotation speed of the fresh air blower, the method further comprises:
after a third preset time interval, acquiring the air temperature and the indoor dew point temperature;
and increasing the rotating speed of the fresh air fan when the difference value between the indoor dew point temperature and the air temperature is smaller than the first preset threshold value.
6. The method as claimed in claim 5, wherein the step of increasing the rotation speed of the fresh air blower comprises:
acquiring indoor air parameters of an air conditioner;
determining a target fresh air volume according to the indoor air parameters;
determining a target rotating speed of the fresh air fan according to the target fresh air volume;
and increasing the fresh air fan according to the target rotating speed.
7. An air conditioner is characterized in that the air conditioner is provided with a fresh air duct, a fresh air fan and a fresh air inlet connected with the air inlet of the fresh air duct, indoor return air is arranged at the air inlet of the fresh air duct or the air inlet of the fresh air duct, an air door is arranged on the indoor return air, an indoor air outlet which forms air convection with the indoor return air inlet is further arranged on the fresh air inlet pipe or the fresh air duct, a fresh air heat exchange pipe and a drainage fan are further arranged on the air conditioner, wherein the air inlet of the fresh air heat exchange pipe is an outdoor fresh air inlet, the air outlet of the fresh air heat exchange pipe is communicated with the fresh air duct, and the drainage fan is arranged at the indoor air outlet; the air conditioner also comprises a memory, a processor and a fresh air duct anti-freezing control program which is stored in the memory and can run on the processor, wherein the fresh air fan and the air door are both connected with the processor, and the steps of the fresh air duct anti-freezing method for the air conditioner as claimed in any one of claims 1 to 6 are realized when the fresh air duct anti-freezing control program is executed by the processor.
8. The air conditioner as claimed in claim 7, wherein when the flow guide fan rotates, indoor air is introduced into the fresh air duct or the fresh air inlet pipe from the indoor air return opening, exchanges heat with the fresh air heat exchange pipe, and then is blown out from the indoor air outlet.
9. The air conditioner as claimed in claim 8, further comprising a heat exchange air duct, wherein the heat exchange air duct comprises a heat exchange air return opening and a heat exchange air outlet, a heat exchange assembly is arranged between the heat exchange air return opening and the heat exchange air outlet, and an air guide duct is arranged between the heat exchange air return opening and the indoor air outlet so as to convey air after heat exchange with the fresh air heat exchange tube into the heat exchange air duct.
10. A storage medium, characterized in that the storage medium stores a fresh air duct anti-freezing control program, and the fresh air duct anti-freezing control program, when executed by a processor, implements the steps of the air conditioner fresh air duct anti-freezing method according to any one of claims 1 to 6.
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