Control method of fresh air conditioner and fresh air conditioner

Abstract

The application belongs to the technical field of air conditioners, and particularly provides a control method of a fresh air conditioner and the fresh air conditioner. The control method comprises the following steps: detecting a current concentration of indoor carbon dioxide; in response to the current concentration reaching a preset concentration, determining a first temperature difference value between a preset temperature of the fresh air conditioner and an indoor temperature; and in response to the first temperature difference value being less than or equal to a first temperature threshold, controlling the fresh air conditioner to start a fresh air function. The fresh air conditioner can automatically start the fresh air function according to the concentration of indoor carbon dioxide, the preset temperature of the fresh air conditioner and the indoor temperature, thereby ensuring the sleep quality of the user at night.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and specifically provides a control method for a fresh air conditioner and a fresh air conditioner. Background Technology

[0002] Existing air conditioners with fresh air systems combine cooling and ventilation functions. In the hot summer, users often close windows to achieve better cooling. However, after a prolonged period, this leads to oxygen depletion, increased carbon dioxide levels, and deteriorating air quality. At this time, users can turn on the air conditioner's fresh air function to introduce outdoor air into the room, increasing the oxygen concentration.

[0003] However, the fresh air function of existing air conditioners is generally manually activated. Since users are unlikely to notice changes in oxygen and carbon dioxide levels in the air after falling asleep, they cannot activate the fresh air function in time, which in turn affects their sleep quality and may even affect their health. Summary of the Invention

[0004] One objective of this invention is to solve the problem that the fresh air function of existing fresh air conditioners cannot be automatically turned on.

[0005] A further objective of this invention is to prevent condensation from occurring in the fresh air when the fresh air function of a fresh air conditioner is activated.

[0006] A further objective of this invention is to ensure that the fresh air function is activated within a temperature range that is comfortable for the user.

[0007] To achieve the above objectives, the present invention provides a method for controlling a fresh air conditioning system in a first aspect, comprising:

[0008] Detect the current concentration of carbon dioxide indoors;

[0009] In response to the current concentration reaching the preset concentration, a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined;

[0010] In response to the first temperature difference being less than or equal to the first temperature threshold, the fresh air conditioner is controlled to turn on the fresh air function.

[0011] Optionally, the step of determining a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature in response to the current concentration reaching a preset concentration includes:

[0012] In response to the current concentration reaching a preset concentration, it is determined whether the body temperature of the indoor user has reached a second temperature threshold; wherein the second temperature threshold is greater than or equal to the maximum normal body temperature of a human.

[0013] In response to the user's body temperature reaching the second temperature threshold, a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined.

[0014] Optionally, the control method further includes:

[0015] In response to the user's body temperature not reaching the second temperature threshold, the fresh air conditioner is controlled to keep the fresh air function off.

[0016] Optionally, the step of controlling the fresh air conditioner to activate its fresh air function in response to the first temperature difference being less than or equal to a first temperature threshold includes:

[0017] In response to the first temperature difference being less than or equal to a first temperature threshold, a second temperature difference between the outdoor temperature and the indoor temperature is determined;

[0018] In response to the second temperature difference being less than or equal to the third temperature threshold, the fresh air conditioner is controlled to immediately turn on the fresh air function.

[0019] Optionally, the step of controlling the fresh air conditioner to turn on the fresh air function in response to the first temperature difference being less than or equal to the first temperature threshold further includes:

[0020] In response to the second temperature difference being greater than the third temperature threshold, the fresh air conditioner is controlled to heat its fresh air duct for a preset time, and then the fresh air conditioner is controlled to turn on the fresh air function.

[0021] Optionally, the preset temperature is denoted as T. 设 Let the first temperature threshold be denoted as T1, and the first temperature threshold satisfies the following formula:

[0022]

[0023] Where k is any value from 2 to 4, and t is any value from 16 to 20.

[0024] Optionally, the control method further includes:

[0025] In response to the current concentration not reaching the preset concentration, the fresh air conditioner is controlled to shut off the fresh air function.

[0026] In a second aspect, the present invention provides a fresh air conditioning system, comprising:

[0027] Heat exchange devices are used for cooling / heating indoor environments;

[0028] Fresh air system, used to provide fresh air to the room;

[0029] Controller;

[0030] A memory storing execution instructions configured to enable the fresh air conditioner to perform the control method described in any one of the first aspects when executed by the controller.

[0031] Optionally, the fresh air device includes a heating device for heating the fresh air duct of the fresh air device.

[0032] Optionally, the fresh air duct is inclined upwards in a direction away from its inlet.

[0033] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this invention, when the current indoor carbon dioxide concentration reaches a preset concentration, a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined. When the first temperature difference is less than or equal to a first temperature threshold, the fresh air conditioner is controlled to activate its fresh air function. This allows the fresh air conditioner to automatically activate its fresh air function based on three parameters: the indoor carbon dioxide concentration, the preset temperature of the fresh air conditioner, and the indoor temperature. Therefore, this invention can ensure the user's sleep quality at night.

[0034] Meanwhile, when the first temperature difference is less than or equal to the first temperature threshold, the fresh air function of the air conditioner is turned on. This ensures that when the fresh air function is turned on, the indoor temperature is in a relatively comfortable range and there is sufficient cooling capacity to prevent the indoor temperature from dropping too slowly after the hot outdoor air enters the room, thus reducing the user's comfort.

[0035] Furthermore, by determining a second temperature difference between the outdoor and indoor temperatures, and when the second temperature difference is greater than a third temperature threshold, the system controls the fresh air conditioner to heat its fresh air duct for a preset time before turning on the fresh air function. This avoids the fresh air entering the fresh air conditioner from the outside from being too cold due to the low temperature of the fresh air duct, which would cause the fresh air temperature to drop and condense.

[0036] Other beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improved objectives, features and advantages of the present invention. Attached Figure Description

[0037] To more clearly illustrate the technical solution of the present invention, some embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar parts or components in different drawings; the drawings of the present invention are not necessarily drawn to scale.

[0038] In the attached image:

[0039] Figure 1 This is a schematic diagram of a fresh air conditioner provided by the present invention;

[0040] Figure 2 yes Figure 1 A cross-sectional view of a fresh air conditioning unit along the AA direction;

[0041] Figure 3 yes Figure 1 Front view of a fresh air conditioning unit;

[0042] Figure 4 yes Figure 1 A schematic diagram of some of the internal structures of a fresh air conditioning unit;

[0043] Figure 5 yes Figure 4 Structural view of the fresh air unit;

[0044] Figure 6 This is a flowchart of the main steps of the control method for a fresh air conditioner in some embodiments of the present invention;

[0045] Figure 7 This is a flowchart of the steps for determining the first temperature difference in other embodiments of the present invention;

[0046] Figure 8 This is a flowchart of the steps for activating the fresh air function based on a first temperature difference in some embodiments of the present invention. Detailed Implementation

[0047] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0048] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Furthermore, it should be noted that in the description of this invention, the terms "coldness" and "heat" are two descriptions of the same physical state. That is, the higher the "coldness" of a target object (e.g., evaporator, air, condenser, etc.), the lower its "heat," and vice versa. A target object absorbs "coldness" while releasing "heat," and releases "coldness" while absorbing "heat." A target object retains "coldness" or "heat" to maintain its current temperature. "Refrigeration" and "heat absorption" are two descriptions of the same physical phenomenon; that is, a target object (e.g., an evaporator) absorbs heat while refrigerating.

[0051] like Figures 1 to 3 As shown, in this invention, the fresh air air conditioner includes a body 10, a heat exchange device 20 installed on the body 10, and a fresh air device 30 installed on the body 10.

[0052] The heat exchange device 20 is used for cooling / heating the indoor environment. That is, the heat exchange device 20 can cool or heat the indoor environment. Alternatively, those skilled in the art can configure the heat exchange device 20 to only cool or heat the indoor environment as needed.

[0053] The fresh air unit 30 is used to introduce outdoor air into the room, thereby improving indoor air quality.

[0054] like Figure 1 and Figure 2 As shown, the body 10 is provided with a heat exchange air inlet 11 and a heat exchange air outlet 12. The heat exchange air inlet 11 is used to allow indoor air to enter the body 10, and the heat exchange air outlet 12 is used to allow the air inside the body 10 to flow out into the room.

[0055] like Figure 2As shown, the heat exchange device 20 includes a heat exchanger 21 and a heat exchange fan 22, both of which are fixed inside the body 10. The heat exchanger 21 is configured such that air flowing from the heat exchange inlet 11 to the heat exchange outlet 12 passes through the heat exchanger 21, thereby cooling or heating the air. When the heat exchanger 21 cools the air, it functions as an evaporator; when it heats the air, it functions as a condenser. The heat exchange fan 22 drives the air to flow from the heat exchange inlet 11 to the heat exchange outlet 12.

[0056] like Figure 1 and Figure 3 As shown, the body 10 is also provided with a fresh air outlet 13, which is connected to the fresh air device 30 so that the fresh air device 30 can blow the air drawn in from the outside into the room through the fresh air outlet 13.

[0057] like Figure 4 and Figure 5 As shown, in this invention, the fresh air device 30 includes a fresh air fan 31 installed on the body 10 and a fresh air duct 32 installed on the body 10. The fresh air duct 32, the fresh air fan 31, and the fresh air outlet 13 are sequentially fluidly connected.

[0058] Those skilled in the art will understand that when a fresh air conditioning system cools an indoor space, the temperature of the heat exchanger 21 is low, resulting in a lower temperature for the nearby fresh air duct 32. If the outdoor temperature is high at this time, the outdoor air entering the fresh air duct 32 will cool down, causing moisture in the air to condense into liquid water. To prevent condensate from accumulating inside the fresh air duct 32, it can be inclined upwards away from its inlet, allowing the condensate to drain to the outside from the outlet of the fresh air duct 32.

[0059] like Figure 4 and Figure 5 As shown, in this invention, the fresh air device 30 also includes a heating device 33, which is used to heat the fresh air duct 32 to increase the temperature of the fresh air duct 32 and prevent the temperature of the fresh air duct 32 from being too low, thereby effectively preventing the formation of condensate in the fresh air duct 32.

[0060] The heating device 33 can be any feasible heating device, such as an electric heating wire wound on the fresh air duct 32.

[0061] like Figure 3 As shown, in this invention, the fresh air conditioner also includes a controller 40 and a memory 50. The controller 40 is used to control the fresh air conditioner to execute the control method described in any of the following embodiments, and the memory 50 is used to store the operating parameters of the fresh air conditioner and the instructions that can be executed by the fresh air conditioner.

[0062] Furthermore, in addition to including Figures 1 to 3 The indoor unit shown may also include an outdoor unit. The controller 40 and / or memory 50 may also be mounted on the outdoor unit.

[0063] The control method of the fresh air conditioner in this invention will be described in detail below with reference to the fresh air conditioner described above.

[0064] like Figure 6 In some embodiments of the present invention, the control method for a fresh air conditioning system includes:

[0065] Step S100: Detect the current concentration of carbon dioxide in the room.

[0066] In this invention, the fresh air conditioner also includes a carbon dioxide sensor (not shown in the figure) to detect the current concentration of carbon dioxide in the room. The carbon dioxide sensor can be an infrared carbon dioxide sensor, a catalytic carbon dioxide sensor, or a thermally conductive carbon dioxide sensor.

[0067] Furthermore, the carbon dioxide sensor can be installed at the heat exchange inlet 11, at the heat exchange outlet 12, on the front side of the fresh air conditioner, or at any other feasible location.

[0068] In step S200, in response to the current concentration reaching the preset concentration, a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined.

[0069] The preset concentration is selected from any value between 0.07% and 0.5%, preferably from any value between 0.1% and 0.25%. More preferably, the preset concentration is 0.1%.

[0070] In this invention, the fresh air conditioner also includes an indoor temperature sensor for detecting the indoor ambient temperature. This indoor temperature sensor can be located at the heat exchange air inlet 11, or at any other feasible location, such as the left or right side panel of the fresh air conditioner.

[0071] Specifically, the first temperature difference value is the absolute value of the difference between the preset temperature and the indoor temperature.

[0072] In step S300, in response to the first temperature difference being less than or equal to the first temperature threshold, the fresh air conditioner is controlled to turn on the fresh air function.

[0073] The fresh air function involves turning on the fresh air fan 31, which drives outdoor air into the room.

[0074] Specifically, when the first temperature difference is less than or equal to the first temperature threshold, the fresh air fan 31 is turned on.

[0075] For ease of description, the preset temperature of the fresh air conditioner will be denoted as T. 设 The indoor temperature is denoted as T. 内 Let the first temperature threshold be denoted as T1.

[0076] Furthermore, in this invention, the first temperature threshold T1 can be a quantitative value or a variable.

[0077] When the first temperature threshold T1 is a fixed value, the first temperature threshold is selected from any value between 1℃ and 5℃, such as 1℃, 2℃, 3℃, 4℃, 5℃, etc. The first temperature threshold is preferably 3℃.

[0078] When the first temperature difference T1 is a variable, it is obtained by the following formula (1):

[0079]

[0080] Where k is any value from 2 to 4, and t is any value from 16 to 20.

[0081] Furthermore, the first temperature difference T1 can be rounded to an integer. Those skilled in the art will understand that the first temperature difference obtained through the above formula decreases as the preset temperature of the fresh air conditioning unit increases and increases as the preset temperature decreases, ensuring the comfort of indoor occupants, especially when the fresh air conditioning unit is cooling the room.

[0082] In one scenario, k is 2 and t is 20. If the preset temperature T... 设 If the temperature is 26℃, then the first temperature difference T1 is approximately 2.9℃. Rounding T1 gives 3℃. At this point, when the indoor temperature drops to 29℃ or below, the fresh air function of the air conditioner can be activated.

[0083] In another scenario, k is 2 and t is 20. If the preset temperature T is set to 16℃, the first temperature difference T1 is approximately 5.9℃, which, when rounded, is 6℃. At this point, when the indoor temperature drops to 22℃ or below, the fresh air function of the air conditioner can be activated.

[0084] Furthermore, in some embodiments of the present invention, the control method for the fresh air conditioning system further includes:

[0085] In a step parallel to step S200, if the current concentration does not reach the preset concentration, the fresh air function of the fresh air conditioner is kept off, that is, the fresh air fan 31 is kept off.

[0086] In a step parallel to step S300, if the first temperature difference is less than or equal to the first temperature threshold, the fresh air function of the fresh air conditioner is kept off, that is, the fresh air fan 31 is kept off.

[0087] Based on the foregoing description, those skilled in the art will understand that in some embodiments of the present invention, the fresh air conditioner can not only automatically activate the fresh air function based on three parameters: indoor carbon dioxide concentration, the preset temperature of the fresh air conditioner, and indoor temperature, but also activate the fresh air function when the indoor temperature is too high or too low by using the first temperature difference of the variable.

[0088] Furthermore, the first temperature threshold is dynamically changed using the above formula (1), so that the fresh air function of the fresh air conditioner is activated when the preset temperature is high (e.g., 26°C) and the indoor temperature (e.g., 29°C) is close to the preset temperature (e.g., 3°C); and the fresh air function of the fresh air conditioner is activated when the preset temperature is low (e.g., 16°C) and the indoor temperature (e.g., 22°C) is far from the preset temperature (e.g., 6°C). Especially when the fresh air conditioner is cooling, it can keep the indoor temperature in a relatively comfortable range, neither too high nor too low, ensuring user comfort.

[0089] Those skilled in the art will also understand that if a fresh air conditioner turns on its fresh air function when the indoor temperature is too high, it will cause a large amount of heat to rush into the room, affecting the cooling rate of the fresh air conditioner. If a fresh air conditioner turns on its fresh air function when the indoor temperature is too low, it will cause a large amount of heat to rush into the room, causing the indoor temperature to rise rapidly, which can easily cause users to catch a cold in an environment of alternating hot and cold temperatures.

[0090] It should be noted that the preceding text refers to... Figure 6 The control method described is merely a basic technical solution for achieving the technical objectives of this invention. Based on this, the invention can also include other feasible control methods. Examples are given below. For ease of description, the following sections will only detail the differences between some embodiments described above and those described earlier.

[0091] like Figure 7 As shown, in some other embodiments of the present invention, step S200 further includes:

[0092] Step S210: In response to the current concentration reaching the preset concentration, determine whether the body temperature of the indoor user has reached the second temperature threshold.

[0093] In other embodiments of the invention, the fresh air conditioner includes an infrared sensor to detect the body temperature of an indoor user. The infrared sensor can be located at any position on the unit 10, such as on the front panel of the fresh air conditioner.

[0094] Optionally, the body temperature detected by the fresh air conditioner is the average body temperature of all users in the room.

[0095] The second temperature threshold is greater than or equal to the maximum normal human body temperature. The normal human body temperature is 36°C to 37°C, therefore the second temperature threshold is greater than or equal to 37°C. Preferably, the second temperature threshold is 37°C.

[0096] In step S220, in response to the user's body temperature reaching the second temperature threshold, the first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined.

[0097] In a step parallel to step S220, if the user's body temperature reaches the second temperature threshold, the fresh air function of the fresh air conditioner is kept off, that is, the fresh air fan 31 is kept off.

[0098] As will be understood by those skilled in the art, in other embodiments of the present invention, the purpose of determining the user's body temperature is that the higher the user's body temperature, the more carbon dioxide is expelled, the faster the rate of carbon dioxide production in the room, and the more oxygen is needed.

[0099] Meanwhile, in other embodiments of the present invention, the purpose of determining the user's body temperature is also to determine whether there is a user in the room, so as to avoid the fresh air conditioner turning on the fresh air function when there is no user in the room, thus wasting energy.

[0100] like Figure 8 As shown, in some other embodiments of the present invention, step S300 further includes:

[0101] Step S310: In response to the first temperature difference being less than or equal to the first temperature threshold, a second temperature difference between the outdoor temperature and the indoor temperature is determined.

[0102] In other embodiments of the invention, the fresh air conditioner includes an outdoor temperature sensor to detect the outdoor temperature. The outdoor temperature sensor is located on the outdoor unit of the fresh air conditioner.

[0103] The second temperature difference is the absolute value of the difference between the outdoor temperature and the indoor temperature.

[0104] In step S320, in response to the second temperature difference being less than or equal to the third temperature threshold, the fresh air conditioner is controlled to immediately turn on the fresh air function.

[0105] The third temperature threshold is any value selected from 3℃ to 10℃, such as 3℃, 5℃, 7℃, 9℃, 10℃, etc. The third temperature threshold is preferably 5℃.

[0106] The step parallel to step S320 is to control the fresh air conditioner to heat its fresh air duct 32 for a preset time in response to the second temperature difference being greater than the third temperature threshold, and then control the fresh air conditioner to turn on the fresh air function.

[0107] The preset duration is designed to ensure that the fresh air duct 32 is heated to prevent condensation from forming when outdoor air enters the fresh air duct 32. Based on this, the preset duration can be any feasible time, such as 3 minutes, 5 minutes, 10 minutes, etc.

[0108] Those skilled in the art will understand that, in some embodiments of the present invention, by determining a second temperature difference between the outdoor temperature and the indoor temperature, and when the second temperature difference is greater than a third temperature threshold, the fresh air conditioner is controlled to heat its fresh air duct 32 for a preset time before the fresh air conditioner is controlled to turn on the fresh air function, thus avoiding the situation where the temperature of the fresh air decreases and condenses when the outdoor fresh air enters the fresh air conditioner due to the low temperature of the fresh air duct 32.

[0109] Furthermore, in this invention, the control method for the fresh air conditioner also includes: during the process of turning on the fresh air function, if it is detected that the current concentration of indoor carbon dioxide has dropped below a preset concentration, then the fresh air conditioner is controlled to turn off the fresh air function.

[0110] The technical solutions of the present invention have been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Without departing from the technical principles of the present invention, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to related technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of the present invention will fall within the scope of protection of the present invention.

Claims

1. A method for controlling a fresh air conditioning system, comprising: Detect the current concentration of carbon dioxide indoors; In response to the current concentration reaching the preset concentration, a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined; In response to the first temperature difference being less than or equal to the first temperature threshold, the fresh air conditioner is controlled to turn on the fresh air function. Let the preset temperature be denoted as T. 设 Let the first temperature threshold be denoted as T1. The first temperature threshold satisfies the following formula so that the first temperature threshold decreases as the preset temperature increases and increases as the preset temperature decreases, thereby ensuring the comfort of indoor occupants: ， Where k is any value from 2 to 4, and t is any value from 16 to 20.

2. The control method according to claim 1, wherein, The step of responding to the current concentration reaching a preset concentration and determining a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature includes: In response to the current concentration reaching a preset concentration, it is determined whether the body temperature of the indoor user has reached a second temperature threshold; wherein the second temperature threshold is greater than or equal to the maximum normal body temperature of a human. In response to the user's body temperature reaching the second temperature threshold, a first temperature difference between the preset temperature of the fresh air conditioner and the indoor temperature is determined.

3. The control method according to claim 2, wherein, The control method further includes: In response to the user's body temperature not reaching the second temperature threshold, the fresh air conditioner is controlled to keep the fresh air function off.

4. The control method according to claim 1, wherein, The step of controlling the fresh air conditioner to activate its fresh air function in response to the first temperature difference being less than or equal to a first temperature threshold includes: In response to the first temperature difference being less than or equal to a first temperature threshold, a second temperature difference between the outdoor temperature and the indoor temperature is determined; In response to the second temperature difference being less than or equal to the third temperature threshold, the fresh air conditioner is controlled to immediately turn on the fresh air function.

5. The control method according to claim 4, wherein, The step of controlling the fresh air conditioner to turn on the fresh air function in response to the first temperature difference being less than or equal to the first temperature threshold further includes: In response to the second temperature difference being greater than the third temperature threshold, the fresh air conditioner is controlled to heat its fresh air duct for a preset time, and then the fresh air conditioner is controlled to turn on the fresh air function.

6. The control method according to any one of claims 1 to 5, wherein, The control method further includes: In response to the current concentration not reaching the preset concentration, the fresh air conditioner is controlled to shut off the fresh air function.

7. A fresh air conditioning system, comprising: Heat exchange devices are used for cooling / heating indoor environments; Fresh air system, used to provide fresh air to the room; Controller; A memory storing execution instructions configured to enable the fresh air conditioner to perform the control method of any one of claims 1 to 6 when executed by the controller.

8. The fresh air conditioner according to claim 7, wherein, The fresh air device includes a heating device for heating the fresh air duct of the fresh air device.

9. The fresh air conditioner according to claim 8, wherein, The fresh air duct is inclined upwards in a direction away from its inlet.

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