CN114294774B - Air conditioner and control method thereof - Google Patents

Abstract

The invention discloses an air conditioner and a control method thereof. The control method of the air conditioner includes the following steps: S1, cooling operation of the air conditioner; S2, turning on the fresh air fan; S3, acquiring indoor humidity, air quality and outdoor ambient temperature; S4, Determine whether the indoor humidity is greater than or equal to the first preset indoor humidity; S5, when the judgment result in step S4 is yes, if the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, control the fresh air fan to stop running; if When the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan is controlled to run at low wind speed. Therefore, when the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan is controlled to stop running, so as to save energy and ensure a cooling effect. When the air quality is medium, the fresh air fan operates at low wind speed, which not only improves the indoor air quality, but also reduces the influence of the outdoor ambient temperature on the indoor temperature.

Description

Air conditioner and its control method

technical field

The invention relates to the field of air conditioners, in particular to an air conditioner and a control method thereof.

Background technique

In the prior art, the wind speed of the fresh air fan of the air conditioner is adjusted following the wind speed of the fan of the air conditioner, and only the indoor air quality and temperature are used as reference factors for adjusting the wind speed of the fresh air fan, and only the influence of temperature and air quality on the energy efficiency of the air conditioner is considered. Influence, ignoring other important factors, unable to guarantee the user's comfort and health to the greatest extent.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide an air conditioner and a control method thereof.

The present invention further provides an air conditioner, which adopts the control method of the above air conditioner.

The control method of the air conditioner according to the embodiment of the first aspect of the present invention includes the following steps: S1, the cooling operation of the air conditioner; S2, turning on the fresh air fan of the air conditioner; S3, obtaining indoor humidity, air quality and outdoor ambient temperature ; S4. Judging whether the indoor humidity is greater than or equal to the first preset indoor humidity; S5. When the judgment result in step S4 is yes, if the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor environment temperature, then control the fresh air fan to stop running; if the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to run at low wind.

According to the control method of the air conditioner in the embodiment of the present invention, when the air conditioner is in cooling operation, the main control system of the air conditioner can adjust the operating state of the fresh air fan according to the detected indoor humidity, air quality and outdoor ambient temperature, and introduce fresh air to adjust the indoor temperature. Air quality, meanwhile, can control indoor humidity to enhance user comfort. When the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan is controlled to stop running, so as to save energy and ensure the cooling effect. When the air quality is medium and the indoor humidity is within the comfortable range, the fresh air fan operates at low wind speed, which not only improves the indoor air quality, but also reduces the influence of the outdoor ambient temperature on the indoor temperature, thereby ensuring the user's comfort and user comfort to the greatest extent. healthy.

In some embodiments, in step S4, it is judged whether the indoor humidity is greater than or equal to the first preset indoor humidity, and whether the indoor humidity is lower than a second preset indoor humidity, and the second preset indoor humidity is greater than The first preset indoor humidity.

In step S5, when the judgment result in step S4 is yes, if the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to intermittently Operation: if the air quality is medium and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to run intermittently according to the received wind speed command.

In some embodiments, step S5 further includes: if the air quality is bad and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, controlling the fresh air fan to operate at low wind; if the air quality is If the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run according to the received wind speed instruction.

In some embodiments, the first preset indoor humidity is 45%, and the second preset indoor humidity is 75%.

In some embodiments, in step S4, it is determined whether the indoor humidity is greater than or equal to a second preset indoor humidity, and the second preset indoor humidity is greater than the first preset indoor humidity.

In step S5, when the judgment result in step S4 is yes, if the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to run at low wind; if the If the air quality is medium and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then the fresh air fan is controlled to operate according to the received wind speed command.

In some embodiments, step S5 further includes: if the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then controlling the fresh air fan to run intermittently at high wind; if the air quality If it is bad and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run continuously at high wind speed.

In some embodiments, after step S4, it further includes: S6. When the judgment result in step S4 is No, if the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control The fresh air fan operates intermittently at low wind speed; if the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan is controlled to run at low wind speed.

In some embodiments, in step S6, if the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind; if the air quality is medium and When the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run in a stroke.

In some embodiments, step S6 further includes: if the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, controlling the fresh air fan to operate at low wind; if the air quality is If the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run at high wind speed.

In some embodiments, the preset outdoor ambient temperature is 36°C.

The air conditioner according to the embodiment of the second aspect of the present invention adopts the control method of the air conditioner according to any one of the above embodiments.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and understandable from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of a control method within the range of a first preset indoor humidity and a second preset indoor humidity according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a method for controlling indoor humidity greater than a second preset humidity according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a control method for indoor humidity less than a first preset according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary. An air conditioner and a control method thereof according to embodiments of the present invention will be described below with reference to FIGS. 1-3 .

Specifically, as shown in FIG. 1 , the control method of the air conditioner includes the following steps: S1, cooling operation of the air conditioner; S2, turning on the fresh air fan of the air conditioner; S3, acquiring indoor humidity, air quality and outdoor ambient temperature; S4, Determine whether the indoor humidity is greater than or equal to the first preset indoor humidity; S5, when the judgment result in step S4 is yes, S51, if the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to stop Operation; S52. If the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, control the fresh air fan to operate at low wind speed.

Wherein, the excellent, medium and poor air quality can be judged by detecting the concentration of _CO2 in the indoor air. When the air quality is excellent, the CO ₂ concentration is <700ppm; when the air quality is moderate, 700ppm≤CO ₂ concentration<1000ppm; when the air quality is poor, the CO ₂ concentration is ≥1000ppm.

If the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan will be controlled to stop running. The introduction of high-temperature air reduces the cooling effect and causes user discomfort. At the same time, if the indoor ambient humidity is too high, since the air conditioner has a certain dehumidification effect in cooling mode, it can further dehumidify the indoor air, and turning off the fresh air fan can ensure the dehumidification effect.

According to the control method of the air conditioner in the embodiment of the present invention, when the air conditioner is in cooling operation, the main control system of the air conditioner can adjust the operating state of the fresh air fan according to the detected indoor humidity, air quality and outdoor ambient temperature, and introduce fresh air to adjust the indoor temperature. Air quality, meanwhile, can control indoor humidity to enhance user comfort. When the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan is controlled to stop running, so as to save energy and ensure the cooling effect. When the air quality is medium, the fresh air fan operates at low wind speed, which not only improves the indoor air quality, but also reduces the impact of the outdoor ambient temperature on the indoor temperature, thereby ensuring the user's comfort and health to the greatest extent.

In some embodiments, referring to FIG. 1, in step S4, it is judged whether the indoor humidity is greater than or equal to the first preset indoor humidity, and whether the indoor humidity is smaller than the second preset indoor humidity, and the second preset indoor humidity is greater than the first preset indoor humidity. Indoor humidity. In step S5, when the judgment result in step S4 is yes, S53, if the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to run intermittently according to the received wind speed instruction; S54, if the air If the quality is medium and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run intermittently according to the received wind speed command.

When the indoor humidity is between the first preset indoor humidity and the second preset indoor humidity, and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, if the environmental quality is excellent, the air conditioner controls the fresh air fan to run intermittently, for example, the fresh air fan It can be turned on for 1 hour and turned off for 0.5 hours to achieve energy saving and constant indoor temperature, keep indoor humidity and indoor air quality within a comfortable temperature range, and increase user comfort. From the perspective of energy saving, when the outdoor environment is low, When the indoor humidity is appropriate and the indoor air quality is excellent, intermittent operation based on the received wind speed command can achieve energy-saving effects.

When the indoor humidity is between the first preset indoor humidity and the second preset indoor humidity, and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, if the ambient quality is medium, the air conditioner controls the intermittent operation of the fresh air fan, which can improve the indoor air Quality, and can avoid the long-term continuous operation of the fresh air fan, which will cause the rise of the indoor temperature, increase the frequency of the compressor of the air conditioner, have the effect of indirect energy saving, and reduce the impact of the fresh air fan on the indoor temperature when it is working.

In some embodiments, as shown in FIG. 1, step S5 further includes: S55, if the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then controlling the fresh air fan to operate at low wind; S56, if the air quality is If the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run according to the received wind speed command.

When the indoor humidity is between the first preset indoor humidity and the second preset indoor humidity, and the indoor environmental quality is poor, if the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the air conditioner controls the fresh air fan to run at low wind speed, and introduces fresh air to change While improving the indoor air quality, avoid excessive air volume from introducing an outdoor ambient temperature higher than the indoor temperature, and reduce the impact of the outdoor ambient temperature on the indoor temperature. If the outdoor ambient temperature is lower than the preset outdoor ambient temperature, when fresh air is introduced to improve indoor air quality, since the outdoor ambient temperature is similar to the indoor temperature, the fresh air fan can continue to run according to the set wind speed, increasing the speed of improving indoor air quality. better.

Specifically, here, the first preset indoor humidity is 45%, and the second preset indoor humidity is 75% for illustration, but it does not represent the restriction on the first preset humidity and the second preset humidity. 45%-75% is the comfortable range of humidity for the human body as an example, so that the air conditioner can control the operation of the fresh air fan as accurately as possible, improve indoor humidity and indoor air quality, increase user comfort and save energy of the air conditioner.

In some embodiments, as shown in FIG. 2, in step S4, it is determined whether the indoor humidity is greater than or equal to a second preset indoor humidity, and the second preset indoor humidity is greater than the first preset indoor humidity. In step S5, when the judgment result in step S4 is yes, S57, if the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind; S58, if the air quality is medium and the outdoor ambient temperature is If the ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run according to the received wind speed command.

Therefore, when the indoor humidity is greater than the second preset indoor humidity and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, if the indoor air quality is good, the air conditioner controls the fresh air fan to run at a low speed to improve air quality and reduce the impact of the outdoor ambient temperature on the indoor temperature. If the indoor air quality is moderate, the air conditioner controls the fresh air fan to run according to the user's instructions, improving the indoor air quality and increasing the user experience.

In some embodiments, as shown in Figure 2, step S5 further includes: S59, if the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to run intermittently at high wind; S510, if the air quality If it is bad and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run continuously at high wind speed. This is because when the outdoor ambient temperature is higher than the preset outdoor ambient temperature and the air quality is poor, it is necessary to quickly improve the indoor air quality, and at the same time reduce the influence of the outdoor ambient temperature on the indoor temperature, and reduce the air conditioner’s work to adjust the indoor temperature rise. The intermittent operation of the fresh air fan can improve the indoor air quality, reduce the impact of the outdoor ambient temperature on the indoor temperature, and realize the energy-saving operation of the air conditioner.

In some embodiments, as shown in FIG. 3, after step S4, it further includes: S6. When the judgment result in step S4 is No, S61. If the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, Then control the fresh air fan to run intermittently at low wind; S62. If the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, control the fresh air fan to run at low wind.

When the indoor humidity is lower than the first preset indoor humidity, and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, and the indoor air quality detected by the air conditioner is excellent, the air conditioner controls the fresh air fan to run intermittently with low wind to improve the indoor air quality. At the same time, it reduces the influence of the outdoor ambient temperature on the indoor and outdoor temperatures, avoids the rise of the indoor temperature, and affects the cooling effect of the air conditioner, causing the air conditioner to make the indoor temperature reach the preset temperature, and the compressor frequently works, increasing the power consumption of the air conditioner. When the detected indoor air quality is moderate, the air conditioner controls the fresh air fan to continue running at low wind speed, reducing the influence of the temperature of the introduced fresh air on the indoor temperature.

In some embodiments, as shown in Figure 3, in step S6, S63, if the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind; S64, if the air quality is medium and When the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run in a stroke.

It can be understood that when the indoor humidity is lower than the first preset indoor humidity and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, if the indoor air quality is good at this time, the air conditioner can control the fresh air fan to run continuously at low wind, which can reduce The air volume increases the indoor humidity while reducing the excessive influence of the outdoor ambient temperature on the indoor temperature, realizing the energy-saving effect of the air conditioner. If the indoor air quality is moderate, the air conditioner can control the continuous operation of the fresh air fan. Since the low outdoor ambient temperature has little effect on the indoor temperature, the fresh air fan can continue to run at a stroke, quickly improving indoor humidity and indoor air quality.

In some embodiments, referring to FIG. 3 , step S6 further includes: S65, if the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then controlling the fresh air fan to operate at low wind; S66, if the air quality is poor and If the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run at high wind speed.

Therefore, when the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, in order to reduce the influence of the outdoor ambient temperature on the indoor temperature, the air conditioner controls the fresh air fan to continue running at low wind speed, so as to avoid introducing too much fresh air with high temperature during the fresh air replacement process. The influence of indoor temperature, for example, the rise of indoor temperature in cooling mode reduces the comfort of users, and the low wind operation of fresh air fan can reduce the influence of outdoor ambient temperature on indoor temperature. When the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the outdoor ambient temperature is relatively suitable. The air conditioner can control the high-speed operation of the fresh air fan to introduce a large amount of fresh air into the room, which can achieve a rapid increase in indoor air quality and improve user comfort.

In some embodiments, the preset outdoor ambient temperature is 36°C, but not limited to 36°C. The preset outdoor ambient temperature can be any temperature value within the temperature range of 30°C to 38°C, preferably the preset outdoor ambient temperature is 36°C, and the preset outdoor ambient temperature can be set according to the human body temperature, which can reasonably control the operating status of the fresh air fan , to improve user experience.

The air conditioner according to the embodiment of the second aspect of the present invention adopts the control method of the air conditioner according to any one of the above embodiments.

Combined with Figure 1-Figure 3, the control method of the air conditioner specifically includes the following situations:

Situation 1: When the indoor humidity is less than 45%, if the indoor air quality is excellent and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run intermittently at low wind. The air conditioner controls the low-wind operation of the fresh air fan. If the indoor air quality is medium and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run at low wind speed; if the indoor air quality is medium and the outdoor ambient temperature is lower than 36°C, the air conditioner controls the fresh air fan to run at medium wind. If the indoor air quality is poor and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run at low wind speed;

Situation 2: When the indoor humidity is greater than or equal to 45% and less than 75%, if the indoor air quality is excellent and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to stop running. If the indoor air quality is excellent and the outdoor ambient temperature is less than 36°C ℃, the air conditioner controls the fresh air fan to run intermittently at the received wind speed. If the indoor air quality is medium and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run at low wind speed; if the indoor air quality is medium and the outdoor ambient temperature is lower than 36°C, the air conditioner controls the fresh air fan to run intermittently at the received wind speed . If the indoor air quality is poor and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run at low wind speed;

Situation 3: When the indoor humidity is greater than 75%, if the indoor air quality is excellent and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to stop running; if the indoor air quality is excellent and the outdoor ambient temperature is lower than 36°C, the air conditioner Control the low-wind operation of the fresh air fan. If the indoor air quality is medium and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run at low wind speed; if the indoor air quality is medium and the outdoor ambient temperature is lower than 36°C, the air conditioner controls the fresh air fan to run at the received wind speed. If the indoor air quality is poor and the outdoor ambient temperature is greater than or equal to 36°C, the air conditioner controls the fresh air fan to run intermittently at high wind speed;

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In the description of the present invention, "first feature" and "second feature" may include one or more of these features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature being "on" or "under" a second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but pass through them. Additional feature contacts between. In the description of the present invention, "above", "above" and "above" a first feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher than Second feature.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (9)

1. A control method for an air conditioner, comprising the following steps: S1. The air conditioner is in cooling operation; S2. Turn on the fresh air fan of the air conditioner; S3. Obtain indoor humidity, air quality and outdoor ambient temperature; S4. Determine whether the indoor humidity is greater than or equal to a first preset indoor humidity, and whether the indoor humidity is lower than a second preset indoor humidity, and the second preset indoor humidity is greater than the first preset indoor humidity; S5, when the judgment result in step S4 is yes, If the air quality is excellent and the outdoor ambient temperature is greater than or equal to a preset outdoor ambient temperature, then control the fresh air fan to stop running; If the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to run intermittently according to the received wind speed instruction; If the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind speed If the air quality is moderate and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then controlling the fresh air fan to run intermittently according to the received wind speed instruction; Step S5 also includes: If the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind speed; If the air quality is poor and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to operate according to the received wind speed command. 2. The control method of an air conditioner according to claim 1, wherein the first preset indoor humidity is 45%, and the second preset indoor humidity is 75%. 3. The control method of the air conditioner according to claim 1, characterized in that, in step S4, judging whether the indoor humidity is greater than or equal to a second preset indoor humidity, and the second preset indoor humidity is greater than the first preset indoor humidity; In step S5, When the judgment result in step S4 is yes, If the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind speed; If the air quality is medium and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to operate according to the received wind speed instruction. 4. The control method of the air conditioner according to claim 3, characterized in that step S5 further comprises: If the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to run intermittently at high winds; If the air quality is poor and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run continuously at high wind speed. 5. The control method of the air conditioner according to claim 1, characterized in that, after step S4, further comprising: S6, when the judgment result in step S4 is no, If the air quality is excellent and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to run intermittently with low wind; If the air quality is medium and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, the fresh air fan is controlled to operate at low wind speed. 6. The control method of the air conditioner according to claim 5, characterized in that, in step S6, If the air quality is excellent and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind speed; If the air quality is medium and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to operate in a moderate wind. 7. The control method of the air conditioner according to claim 5, characterized in that step S6 further comprises: If the air quality is poor and the outdoor ambient temperature is greater than or equal to the preset outdoor ambient temperature, then control the fresh air fan to operate at low wind speed; If the air quality is poor and the outdoor ambient temperature is lower than the preset outdoor ambient temperature, the fresh air fan is controlled to run at high wind speed. 8. The control method of an air conditioner according to claim 1, wherein the preset outdoor ambient temperature is 36°C. 9. An air conditioner, characterized in that the air conditioner control method according to any one of claims 1-8 is adopted.