Control method and control device of air conditioner, and air conditioner

Abstract

The application discloses a control method and device of an air conditioner and the air conditioner, and belongs to the technical field of air conditioners. The air conditioner has a fresh air system, and the control method of the air conditioner comprises the following steps: after the fresh air system is started, the current function mode of the air conditioner is detected; if the function mode is a windless mode, the air supply fan and the air exhaust fan of the fresh air system are controlled to operate according to a preset speed ratio; wherein the preset speed ratio is less than or equal to 1. The application can alleviate the influence of the fresh air function on the windless operation effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly relates to a control method and device of an air conditioner and the air conditioner. BACKGROUND

[0002] With the improvement of the requirement of the user on the life quality, the air conditioner has both the windless function and the fresh air function.

[0003] However, in the related art, when the user simultaneously opens the windless function and the fresh air function, the operation effect of the windless function of the air conditioner is affected by the fresh air function.

[0004] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0005] The main purpose of the present application is to provide a control method and device of an air conditioner and the air conditioner, and aims to solve the technical problem that the operation effect of the fresh air function affects the windless function when the fresh air function and the windless function of the air conditioner are operated at the same time.

[0006] To achieve the above purpose, the present application provides a control method of an air conditioner, the air conditioner has a fresh air system, and the method comprises the following steps:

[0007] After the fresh air system is opened, the function mode currently operated by the air conditioner is detected;

[0008] If the function mode is a windless mode, the supply fan and the exhaust fan of the fresh air system are controlled to operate according to a preset speed ratio; wherein the preset speed ratio is less than or equal to 1.

[0009] In an embodiment, if the function mode is a windless mode, the supply fan and the exhaust fan of the fresh air system are controlled to operate according to a preset speed ratio, comprising:

[0010] If the function mode is a windless mode, the change trend of the fine particulate matter concentration value of the indoor air and the first current value of the fine particulate matter concentration value are obtained;

[0011] According to the change trend and the first current value, the preset speed ratio is determined;

[0012] The supply fan and the exhaust fan are controlled to operate according to the preset speed ratio.

[0013] In an embodiment, according to the change trend and the first current value, the preset speed ratio is determined, comprising:

[0014] If the fine particulate matter concentration value is in an upward trend, and the first current value is greater than or equal to a first preset threshold value, the preset speed ratio is determined as a first preset ratio;

[0015] If the fine particulate matter concentration value is in an upward trend, the first current value is greater than or equal to the second preset threshold value, and the first current value is less than the first preset threshold value, the preset speed ratio is determined as the second preset ratio;

[0016] If the fine particulate matter concentration value is in an upward trend, the first current value is less than the second preset threshold value, the preset speed ratio is determined as the third preset ratio;

[0017] The first preset threshold value is greater than the second preset threshold value; the first preset ratio, the second preset ratio, and the third preset ratio decrease in turn.

[0018] In an embodiment, the preset speed ratio is determined according to the change trend and the first current value, including:

[0019] If the fine particulate matter concentration value is in a downward trend, and the first current value is greater than the fourth preset threshold value, the preset speed ratio is determined as the first preset ratio;

[0020] If the fine particulate matter concentration value is in a downward trend, the first current value is less than the fourth preset threshold value, and the first current value is greater than or equal to the fifth preset threshold value, the preset speed ratio is determined as the second preset ratio;

[0021] If the fine particulate matter concentration value is in a downward trend, the first current value is less than the fifth preset threshold value, the preset speed ratio is determined as the third preset ratio;

[0022] The fourth preset threshold value is greater than the fifth preset threshold value.

[0023] In an embodiment, before the change trend and the current value of the fine particulate matter concentration of the indoor air are obtained, the method further includes:

[0024] The indoor environment temperature and the outdoor environment temperature are obtained;

[0025] The preset speed ratio is determined according to the change trend and the first current value, including:

[0026] At least one preliminary preset ratio is determined according to the change trend and the first current value;

[0027] The preset speed ratio corresponding to the temperature difference value is determined from the at least one preliminary preset ratio; the temperature difference value is the difference between the indoor environment temperature and the outdoor environment temperature, and the temperature difference value and the preset speed ratio are inversely proportional.

[0028] In an embodiment, after the current function mode of the air conditioner is detected, the method further includes:

[0029] If the function mode is not the windless mode, the change trend of the indoor environment parameter and the second current value of the indoor environment parameter are obtained;

[0030] determine the preset rotating speed corresponding to the second current value of the change trend;

[0031] The supply air fan and the exhaust air fan are controlled to operate at the preset rotating speed.

[0032] In an embodiment, the indoor environmental parameter includes a fine particulate matter concentration value of indoor air.

[0033] The determination of the preset rotating speed corresponding to the second current value of the change trend includes:

[0034] If the change trend is an upward trend, the first preset rotating speed corresponding to the second current value of the fine particulate matter concentration value is determined.

[0035] If the change trend is a downward trend, the second preset rotating speed corresponding to the second current value of the fine particulate matter concentration value is determined.

[0036] In an embodiment, the indoor environmental parameter includes a carbon dioxide concentration value of indoor air.

[0037] The determination of the preset rotating speed corresponding to the second current value of the change trend includes:

[0038] If the change trend is an upward trend, the first preset rotating speed corresponding to the second current value of the carbon dioxide concentration value is determined.

[0039] If the change trend is a downward trend, the second preset rotating speed corresponding to the second current value of the carbon dioxide concentration value is determined.

[0040] In a second aspect, the present application provides a control device of an air conditioner, comprising:

[0041] a function detection module, configured to detect a current function mode of the air conditioner after the fresh air system is turned on;

[0042] a fan control module, configured to control a supply air fan and an exhaust air fan of the fresh air system to operate according to a preset rotating speed ratio if the function mode is a no-wind-feeling mode; wherein the preset rotating speed ratio is less than or equal to 1.

[0043] In a third aspect, the present application provides an air conditioner, comprising:

[0044] a fresh air system, the fresh air system comprising an exhaust air fan and a supply air fan;

[0045] a control device of the air conditioner.

[0046] The control method of the air conditioner provided by the embodiment of the present application is used to control the air conditioner to run in the windless mode, and the air supply fan and the air exhaust fan of the fresh air system are controlled to run at a preset speed ratio, and the preset speed ratio is less than or equal to 1, so that the air supply speed of the fresh air system is reduced to reduce the influence of the fresh air volume on the indoor air, and the influence of the fresh air function on the running effect of the windless mode is relieved. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 The flowchart of the control method of the air conditioner according to the first embodiment of the present application is shown in the figure.

[0048] Figure 2 The flowchart of the control method of the air conditioner according to the second embodiment of the present application is shown in the figure.

[0049] Figure 3 The preset speed ratio interval diagram of the control method of the air conditioner according to the second embodiment of the present application is shown in the figure.

[0050] Figure 4 The flowchart of the control method of the air conditioner according to the third embodiment of the present application is shown in the figure.

[0051] Figure 5 The preset speed ratio interval diagram of the control method of the air conditioner according to the fourth embodiment of the present application is shown in the figure.

[0052] Figure 6 The flowchart of the control method of the air conditioner according to the fourth embodiment of the present application is shown in the figure.

[0053] Figure 7 The functional module diagram of the control device of the air conditioner according to the present application is shown in the figure.

[0054] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0055] It should be understood that the specific embodiments described herein are merely used to explain the present application, and are not used to limit the present application.

[0056] In the related art, with the improvement of the user's requirement for the quality of life, the current household air conditioner also begins to have a windless function and a fresh air function. In the windless mode, there is a windless area in the room along the air outlet direction of the air conditioner. The windless area is located between the wind blowing area and the windless area. The air flow speed in the area is relatively slow, the user does not feel uncomfortable, and the user can feel the cooling or heating of the air conditioner, and has high use comfort. In the above description, the windless is not the literal windless, but the DR value of the windless area meets the corresponding windless standard by controlling the wind speed and the wind direction, and the windless can be understood as a comfortable indoor environment.

[0057] The fresh air system is to send fresh air to the room by a fresh air fan on one side of the closed room, and to exhaust the air to the outdoor by an exhaust fan on the other side, so as to form a "fresh air flow field" in the room, thereby meeting the need of fresh air exchange in the room.

[0058] However, when the user simultaneously opens the windless function and the fresh air function, the fresh air system will inevitably affect the operation effect of the windless mode. In particular, the fresh air sent by the fresh air fan will inevitably enhance the air flow in the windless area, and reduce the user's comfort in the area.

[0059] Therefore, the embodiment of the present application provides a control method of an air conditioner. When it is detected that the current operation mode of the air conditioner is the windless mode, the rotational speed of the fresh air system is relatively reduced, the amount of fresh air sent into the room is reduced, the influence of the fresh air amount on the indoor air is reduced, and the influence of the fresh air function on the operation effect of the windless function is alleviated.

[0060] The inventive concept of the present application will be further described below in combination with some specific embodiments.

[0061] The embodiment of the present application provides a first embodiment of a control method of an air conditioner. Referring to Figure 1 , Figure 1 The flowchart of the first embodiment of the control method of the air conditioner is shown.

[0062] In the embodiment, the air conditioner can operate in the windless mode, and the air conditioner has a fresh air system. The fresh air system includes a fresh air fan and an exhaust fan. The fresh air fan is used to send outdoor fresh air into a room where the indoor unit of the air conditioner is located. The exhaust fan is used to exhaust the air in the room to the outside of the room.

[0063] In the embodiment, the method includes the following steps:

[0064] Step S101, after the fresh air system is opened, detecting the function mode currently operated by the air conditioner.

[0065] The user can issue an opening instruction to the fresh air system of the air conditioner through a remote controller. Alternatively, the user can issue an opening instruction to the fresh air system of the air conditioner through a smart home system on a terminal device such as a mobile phone or a tablet. After the fresh air system is opened, in order to avoid the influence of the operation of the fresh air system on the operation of the air conditioner in the windless mode, it is also necessary to detect whether the air conditioner is currently operating in the windless mode, that is, whether the windless function is turned on.

[0066] The air conditioner can have various operating modes, such as a normal operating mode, a windless mode, or a self-cleaning mode. The air conditioner can operate in the corresponding mode according to the operating instruction issued by the user. For example, the user issues a windless operating mode through a remote controller.

[0067] In the windless mode, there is a windless area in the room along the air outlet direction of the air conditioner. The windless area is located between the wind blowing area and the windless area, and the air flow speed in this area is relatively slow, the user does not feel uncomfortable, and the user can feel the cooling or heating of the air conditioner, which has high use comfort. Among them, the windless in the above description is not the literal sense of no wind, but by controlling the wind speed and direction, the DR value of the windless area meets the corresponding windless standard, so the windless can be understood as a kind of indoor comfortable environment. Those skilled in the art can know that the DR value is used to quantitatively predict the percentage of dissatisfied people caused by wind blowing.

[0068] After receiving the fresh air system opening instruction, the current operating mode selected by the user for the air conditioner is detected.

[0069] In step S102, if the function mode is the windless mode, the air supply fan and the exhaust fan of the fresh air system are controlled to operate according to a preset speed ratio, wherein the preset speed ratio is less than or equal to 1.

[0070] If the detection result is that the air conditioner is operating in the windless mode, the speed of the air supply fan and the exhaust fan is adjusted according to the preset speed ratio. Since the preset speed ratio is less than or equal to 1, that is, the ratio of the speed of the air supply fan to the speed of the exhaust fan is less than or equal to 1, therefore, during the operation of the windless mode, the speed of the air supply fan of the fresh air system is always lower than the speed of the exhaust fan, so that the air supply amount of the fresh air system is reduced, thereby reducing the influence of the fresh air from the outdoor to the indoor on the windless area in the room.

[0071] It should be noted that the speed of the exhaust fan of the fresh air conditioner can be the speed of the fresh air system when operating in the normal mode.

[0072] In the embodiment, the fan speed of the fresh air system is linked and controlled when the air conditioner operates in the windless mode, the exhaust fan is normally operated to ensure the ventilation effect, the fresh air supply speed of the fresh air system is relatively reduced, the purpose of reducing the influence of the fresh air volume on the indoor air is achieved, the operation of the air conditioner in the windless mode is relieved from the influence of the fresh air, the fresh air function and the windless function of the air conditioner can be better compatible, and the use experience of the user is improved.

[0073] On the basis of the first embodiment of the control method of the air conditioner, the second embodiment of the control method of the air conditioner is provided. Figure 2 , Figure 2 The flowchart of the second embodiment of the control method of the air conditioner is shown.

[0074] In the embodiment, the following steps are included:

[0075] In step S201, the function mode currently operated by the air conditioner is detected after the fresh air system is turned on.

[0076] In step S202, if the function mode is the windless mode, the change trend of the fine particulate matter concentration value of the indoor air and the first current value of the fine particulate matter concentration value are obtained.

[0077] In step S203, the preset speed ratio is determined according to the change trend and the first current value.

[0078] Specifically, the fresh air system is used for ventilation and air exchange, and is used for removing indoor polluted air to create a healthy and comfortable indoor environment. Therefore, when the fan speed of the fresh air system is adjusted, the appropriate fan speed can also be determined according to the change trend of the fine particulate matter concentration value and the first current value of the fine particulate matter concentration value, so that the air conditioner can also achieve the ventilation effect expected by the user when the fresh air system is turned on without affecting the windless mode.

[0079] The fine particulate matter concentration value is the pm2.5 concentration value of the air in the room. The air conditioner can obtain the real-time pm2.5 concentration value of the air in the room through the pm2.5 sensor installed in the indoor unit, and store it in the database.

[0080] When it is detected that the function mode is the windless mode, the air conditioner can retrieve all the pm2.5 concentration value data of the air in the room obtained in the preset time period. Whether the pm2.5 concentration value of the air in the room in the preset time period is in an upward trend or a downward trend is identified. Then, the corresponding preset speed ratio is obtained in combination with the current value of the pm2.5 concentration value.

[0081] It can be understood that the preset time period can be one hour or half an hour before step 201 is performed, and the embodiment does not limit this.

[0082] In a specific embodiment, when the indoor PM2.5 concentration value is in an upward trend, step S203 comprises:

[0083] Step A10, if the fine particulate matter concentration value is in an upward trend, and the first current value is greater than or equal to the first preset threshold value, determining the preset speed ratio as the first preset ratio;

[0084] Step A20, if the fine particulate matter concentration value is in an upward trend, the first current value is greater than or equal to the second preset threshold value, and the first current value is less than the first preset threshold value, determining the preset speed ratio as the second preset ratio;

[0085] Step A30, if the fine particulate matter concentration value is in an upward trend, the first current value is less than the second preset threshold value, determining the preset speed ratio as the third preset ratio;

[0086] Wherein, the first preset threshold value is greater than the second preset threshold value; the first preset ratio, the second preset ratio and the third preset ratio decrease in turn.

[0087] Specifically, the indoor PM2.5 concentration value can be represented as PM2.5, the first preset threshold value is PM2.5H, the second preset threshold value is PM2.5H-z1, z1 is a natural number greater than 1, and PM2.5H-z1<PM2.5H.

[0088] When the indoor PM2.5 concentration value is in an upward trend:

[0089] When PM2.5≥PM2.5H, the preset speed ratio is k3; k3 is the first preset ratio;

[0090] When PM2.5H≥PM2.5≥PM2.5H-z1, the preset speed ratio is k2; k2 is the second preset ratio;

[0091] When PM2.5H-z1≥PM2.5, the preset speed ratio is k1; k1 is the third preset ratio;

[0092] Wherein, k1<k2<k3≤1.

[0093] In this embodiment, when the indoor PM2.5 concentration value is in an upward trend, the higher the indoor PM2.5 concentration, the greater the preset speed ratio value, that is, the speed of the air supply fan is relatively faster, so as to improve the ventilation efficiency without affecting the windless effect, thereby improving the indoor air quality.

[0094] When the indoor PM2.5 is in a downward trend, step S203 comprises:

[0095] Step B10, if the fine particulate matter concentration value is in a downward trend, and the first current value is greater than the fourth preset threshold value, determining the preset speed ratio as the first preset ratio;

[0096] If the concentration value of the fine particulate matter is in a decreasing trend, the first current value is less than the fourth preset threshold value, and the first current value is greater than or equal to the fifth preset threshold value, the preset rotational speed ratio is determined as the second preset ratio in step B20.

[0097] If the concentration value of the fine particulate matter is in a decreasing trend, the first current value is less than the fifth preset threshold value, the preset rotational speed ratio is determined as the third preset ratio in step B30.

[0098] The fourth preset threshold value is greater than the fifth preset threshold value.

[0099] Specifically, the indoor PM2.5 concentration value can be represented as PM2.5. PM2.5H is the first preset threshold value, PM2.5H-z2 is the fourth preset threshold value, and PM2.5H-z3 is the fifth preset threshold value, where z2 < z3, and both are natural numbers greater than 1, so PM2.5H-z2 > PM2.5H-z3. When the indoor PM2.5 concentration value is in a decreasing trend:

[0100] When PM2.5 ≥ PM2.5H-z2, the preset rotational speed ratio is k3;

[0101] When PM2.5H-z2 ≥ PM2.5 ≥ PM2.5H-z3, the preset rotational speed ratio is k2;

[0102] When PM2.5H-z3 ≥ PM2.5, the preset rotational speed ratio is k1. Wherein, k1 < k2 < k3 ≤ 1.

[0103] In this embodiment, when the indoor PM2.5 concentration value is in a decreasing trend, the higher the indoor PM2.5 concentration, the greater the preset rotational speed ratio, that is, the faster the rotational speed of the air supply fan, so as to improve the ventilation efficiency without affecting the windless effect, thereby improving the indoor air quality.

[0104] For example, referring to Figure 3 In this embodiment, the air conditioner can determine the preset rotational speed ratio according to the table.

[0105] For example, referring to Figure 3 PM2.5H > PM2.5H-z2 > PM2.5H-z1 > PM2.5H-z3.

[0106] When the indoor PM2.5 concentration value is in an upward trend, when PM2.5≥PM2.5H, PM2.5 is in interval 3, and the preset speed ratio corresponding to interval 3 is k3; when PM2.5H≥PM2.5≥PM2.5H-z1, PM2.5 is in interval 2, and the preset speed ratio corresponding to interval 2 is k2; and when PM2.5H-z1≥PM2.5, PM2.5 is in interval 1, and the preset speed ratio corresponding to interval 1 is k1.

[0107] Referring to Figure 3 When the indoor PM2.5 concentration value is in a downward trend, when PM2.5≥PM2.5H-z2, PM2.5 is in interval 3, and the preset speed ratio corresponding to interval 3 is k3; when PM2.5H-z2≥PM2.5≥PM2.5H-z3, PM2.5 is in interval 2, and the preset speed ratio corresponding to interval 2 is k2; and when PM2.5H-z3≥PM2.5, PM2.5 is in interval 1, and the preset speed ratio corresponding to interval 1 is k1.

[0108] Step S204, controlling the supply air fan and the exhaust air fan to operate at the preset speed ratio.

[0109] After the preset speed ratio is determined, the speed of the supply air fan and the speed of the exhaust air fan meet the preset speed ratio, so that the higher the indoor PM2.5 concentration is, the faster the speed of the supply air fan is, so as to improve the ventilation efficiency without affecting the operation effect of the windless mode, and thus improve the indoor air quality. In different change trends, different threshold values are set to improve the linkage effect of the fresh air system and the windless mode, and thus the user's body comfort is higher.

[0110] In the embodiment, the speed of the supply air fan is reduced, the amount of fresh air is reduced, and the influence of the fresh air on the indoor temperature and humidity is reduced, so as to alleviate the influence of the fresh air on the air temperature and humidity in the room in the case that the refrigeration effect of the windless mode is limited.

[0111] On the basis of the first embodiment and the second embodiment of the control method of the air conditioner, a third embodiment of the control method of the air conditioner is provided. Referring to Figure 4 , Figure 4 A flowchart of the third embodiment of the control method of the air conditioner is shown.

[0112] In the embodiment, the method comprises the following steps:

[0113] Step S301, after the fresh air system is turned on, detecting the function mode currently operated by the air conditioner.

[0114] Step S302, obtaining the indoor environment temperature and the outdoor environment temperature.

[0115] wherein the indoor ambient temperature can be represented as TH and the outdoor ambient temperature can be represented as T1.

[0116] In step S303, if the function mode is the windless mode, the change trend of the fine particulate matter concentration value of the indoor air and the first current value of the fine particulate matter concentration value are obtained.

[0117] In step S304, at least one preliminary preset ratio is determined according to the change trend judgment result and the first current value.

[0118] In step S305, a preset rotating speed ratio corresponding to the temperature difference value is determined from the at least one preliminary preset ratio, wherein the temperature difference value is the difference between the indoor ambient temperature and the outdoor ambient temperature.

[0119] It can be understood that the temperature of the fresh air sent into the room from outside the room is inconsistent with the temperature in the room, especially when the air conditioner is running in the windless mode, the cooling effect of the air conditioner is limited. In order to avoid the temperature difference between the fresh air sent into the room and the air in the room affecting the user's sense of comfort, in the embodiment, the value of the preset rotating speed ratio can be further adjusted according to the temperature difference between the indoor ambient temperature and the outdoor ambient temperature.

[0120] For example, in a specific embodiment, the values can be obtained by referring to the following table:

[0121] Temperature difference value k1 k2 k3 T1 - TH < 1 M1 N1 Z1 1 < T1-TH < 3 M2 N2 Z2 3 < T1-TH < 6 M3 N3 Z3 6 < T1- TH M4 N4 Z4

[0122] In the case of different temperature difference values, for example, k1 has M1, M2, M3 and M4, a total of 4 preliminary preset ratios. k2 has N1, N2, N3 and N4, a total of 4 preliminary preset ratios. k3 has Z1, Z2, Z3 and Z4, a total of 4 preliminary preset ratios. Each preliminary preset ratio corresponds to a temperature difference value. Therefore, after obtaining the temperature difference value, k1, k2 and k3 each get a corresponding preset rotating speed ratio.

[0123] wherein the temperature difference value and the preset rotating speed ratio are inversely proportional. That is, as the temperature difference value increases, the preset rotating speed ratio corresponds to a smaller value. For example, M1=0.8, M2=0.7, M3=0.6 and M4=0.5. That is, the rotating speed of the air supply fan is lower.

[0124] For example, the air conditioner obtains the indoor ambient temperature and the outdoor ambient temperature, and the temperature difference value between the two is:

[0125] T1-TH≤1, and according to the change trend judgment result and the first current value, the preliminary preset ratio is determined as k1, at this time, the preset rotating speed ratio can be determined from the above table as M1=0.8.

[0126] In the embodiment, the preset rotation speed ratio is determined according to the temperature difference between indoor and outdoor environments and the change trend and current value of the fine particulate matter concentration value, so that the influence of the fresh air on the indoor air when the fresh air is sent into the room is reduced, and then the change of the humidity in the room is reduced, so that condensation of the indoor unit running in the windless mode is avoided.

[0127] On the basis of the control method of the air conditioner in the embodiment of the present application, a fourth embodiment of the control method of the air conditioner is provided. Figure 6 , Figure 6 A flowchart of the fourth embodiment of the control method of the air conditioner is shown.

[0128] In the embodiment, the method comprises:

[0129] In step S401, after the fresh air system is started, the current function mode of the air conditioner is detected.

[0130] In step 402, if the function mode is not the windless mode, the change trend of the indoor environment parameter and the second current value of the indoor environment parameter are obtained.

[0131] In step 403, the preset rotation speed corresponding to the change trend and the second current value is determined.

[0132] In step 404, the supply air fan and the exhaust air fan are controlled to run at the preset rotation speed.

[0133] Specifically, in the embodiment, if it is detected that the air conditioner is not running in the windless mode after the fresh air system is started, the fresh air system runs in the normal mode. For example, the rotation speed of the fan is adjusted according to the indoor carbon dioxide concentration value, or the rotation speed of the fan is still adjusted according to the indoor pm2.5 concentration value.

[0134] It should be noted that in the embodiment, the fresh air system runs in the normal mode, that is, the rotation speeds of the supply air fan and the exhaust air fan are consistent.

[0135] In a specific embodiment, the indoor environment parameter includes the fine particulate matter concentration value of the indoor air. At this time, step 403 comprises:

[0136] (1) If the change trend is an upward trend, the first preset rotation speed corresponding to the second current value of the fine particulate matter concentration value is determined.

[0137] (2) If the change trend is a downward trend, the second preset rotation speed corresponding to the second current value of the fine particulate matter concentration value is determined.

[0138] In another specific embodiment, the indoor environment parameter includes the carbon dioxide concentration value of the indoor air. At this time, step 403 comprises:

[0139] (1) If the change trend is an upward trend, the first preset rotation speed corresponding to the second current value of the carbon dioxide concentration value is determined.

[0140] (2) If the trend is a downward trend, determining a second preset rotating speed corresponding to a second current value of the carbon dioxide concentration value.

[0141] For example, referring to Figure 5 The preset rotating speed of the fresh air system can be determined according to the interval diagram.

[0142] When the indoor environmental parameter includes the fine particulate matter concentration value of indoor air:

[0143] When the trend is an upward trend, PM2.5ref-X2>PM2.5, the fine particulate matter concentration value is in interval D, and the rotating speed of the fresh air system is the rotating speed corresponding to interval D, such as 40% gear.

[0144] PM2.5ref-X1>PM2.5≥PM2.5ref-X2, the fine particulate matter concentration value is in interval C, and the rotating speed of the fresh air system is the rotating speed corresponding to interval C, such as 60% gear.

[0145] PM2.5ref>PM2.5≥PM2.5ref-X1, the fine particulate matter concentration value is in interval B, and the rotating speed of the fresh air system is the rotating speed corresponding to interval B, such as 80% gear.

[0146] PM2.5≥PM2.5ref, the fine particulate matter concentration value is in interval A, and the rotating speed of the fresh air system is the rotating speed corresponding to interval A, such as 100% gear.

[0147] When the trend is a downward trend, PM2.5ref-X2>PM2.5≥PM2.5ref-X3, the fine particulate matter concentration value is in interval C, and the rotating speed of the fresh air system is the rotating speed corresponding to interval C, such as 60%.

[0148] PM2.5ref-X1>PM2.5≥PM2.5ref-X2, the fine particulate matter concentration value is in interval B, and the rotating speed of the fresh air system is the rotating speed corresponding to interval B, such as 80%;

[0149] PM2.5≥PM2.5ref-X1, the fine particulate matter concentration value is in interval A, and the rotating speed of the fresh air system is the rotating speed corresponding to interval A, such as 100%;

[0150] For example, referring to Figure 5 When the indoor environmental parameter includes the carbon dioxide concentration value of indoor air:

[0151] When the trend is an upward trend, CO2ref-Y2>CO2, the carbon dioxide concentration value is in interval D, and the rotating speed of the fresh air system is the rotating speed corresponding to interval D, such as 40% gear.

[0152] CO2ref-Y1>CO2≥CO2ref-Y2, the carbon dioxide concentration value is in the interval C, and the rotation speed of the fresh air system is the rotation speed corresponding to the interval C, such as 60% gear.

[0153] CO2ref-Y1>CO2≥CO2ref-Y2, the carbon dioxide concentration value is in the interval C, and the rotation speed of the fresh air system is the rotation speed corresponding to the interval C, such as 60% gear.

[0154] CO2ref-Y1>CO2≥CO2ref-Y2, the carbon dioxide concentration value is in the interval C, and the rotation speed of the fresh air system is the rotation speed corresponding to the interval C, such as 60% gear.

[0155] When the downward trend is CO2ref-Y2>CO2≥CO2ref-Y3, the carbon dioxide concentration value is in the interval C, and the rotation speed of the fresh air system is the rotation speed corresponding to the interval C, such as 60%.

[0156] CO2ref-Y1>CO2≥CO2ref-Y2, the carbon dioxide concentration value is in the interval C, and the rotation speed of the fresh air system is the rotation speed corresponding to the interval C, such as 60% gear.

[0157] CO2ref-Y1>CO2≥CO2ref-Y2, the carbon dioxide concentration value is in the interval C, and the rotation speed of the fresh air system is the rotation speed corresponding to the interval C, such as 60% gear.

[0158] Referring to Figure 7 The application provides a control device of an air conditioner, comprising:

[0159] A function detection module 10 is configured to detect a current function mode of the air conditioner after the fresh air system is turned on.

[0160] A fan control module 20 is configured to control the supply fan and the exhaust fan of the fresh air system to operate according to a preset rotation speed ratio if the function mode is the windless mode, wherein the preset rotation speed ratio is less than or equal to 1.

[0161] Other embodiments or specific implementation manners of the control device of the air conditioner can refer to the above-mentioned method embodiments, and will not be described here.

[0162] The application further provides an air conditioner comprising a fresh air system and a control device of the air conditioner.

[0163] The fresh air system comprises an exhaust fan and a supply fan. The supply fan is configured to send outdoor fresh air into a room where an indoor unit of the air conditioner is located. The exhaust fan is configured to exhaust air in the room to outside of the room.

[0164] In addition, it should be noted that the apparatus embodiments described above are merely exemplary, and units described as separate components can or can not be physically separate, and components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to actual needs. In addition, the connection relationship between the modules in the apparatus embodiments provided by the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement it without creative labor.

[0165] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be realized by means of software and necessary general hardware, and of course can also be realized by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. Generally, functions completed by computer programs can be easily realized by corresponding hardware, and specific hardware structures for realizing the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better embodiment. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products, which are stored in readable storage media, such as computer floppy disks, U disks, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic or optical disks, etc., including a number of instructions for making a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods of various embodiments of the present application.

[0166] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the present application specification and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner has a fresh air system, and the method includes: After the fresh air system is turned on, the current operating mode of the air conditioner is detected; If the function mode is the windless mode, the supply fan and exhaust fan of the fresh air system are controlled to operate at a preset speed ratio; wherein, the preset speed ratio is less than or equal to 1; If the functional mode is a windless mode, controlling the supply and exhaust fans of the fresh air system to operate at a preset speed ratio includes: If the function mode is windless mode, obtain the changing trend of the fine particulate matter concentration value in the indoor air and the first current value of the fine particulate matter concentration value; The preset speed ratio is determined based on the changing trend and the first current value; wherein, the larger the first current value, the larger the value of the preset speed ratio. The supply fan and the exhaust fan are controlled to operate according to the preset speed ratio.

2. The control method for an air conditioner according to claim 1, characterized in that, Determining the preset speed ratio based on the changing trend and the first current value includes: If the fine particulate matter concentration value is on an upward trend, and the first current value is greater than or equal to the first preset threshold, the preset rotation speed ratio is determined to be the first preset ratio value; If the fine particulate matter concentration value is on an upward trend, the first current value is greater than or equal to the second preset threshold, and the first current value is less than the first preset threshold, then the preset rotation speed ratio is determined to be the second preset ratio value. If the fine particulate matter concentration value is on an upward trend, and the first current value is less than the second preset threshold, the preset rotation speed ratio is determined to be the third preset ratio value. Wherein, the first preset threshold is greater than the second preset threshold; the first preset ratio, the second preset ratio, and the third preset ratio decrease sequentially.

3. The control method for an air conditioner according to claim 1 or 2, characterized in that, Determining the preset speed ratio based on the changing trend and the first current value includes: If the fine particulate matter concentration value is decreasing and the first current value is greater than the fourth preset threshold, the preset rotation speed ratio is determined to be the first preset ratio value; If the fine particulate matter concentration value is decreasing, the first current value is less than the fourth preset threshold, and the first current value is greater than or equal to the fifth preset threshold, then the preset rotation speed ratio is determined to be the second preset ratio value. If the fine particulate matter concentration value is decreasing, and the first current value is less than the fifth preset threshold, the preset rotation speed ratio is determined to be the third preset ratio value. Wherein, the fourth preset threshold is greater than the fifth preset threshold, and the first preset ratio, the second preset ratio, and the third preset ratio decrease sequentially.

4. The control method for an air conditioner according to claim 1, characterized in that, If the functional mode is a windless mode, before acquiring the trend and current value of the indoor air fine particulate matter concentration, the method further includes: Obtain indoor and outdoor ambient temperatures; Determining the preset speed ratio based on the changing trend and the first current value includes: Based on the trend of change judgment result and the first current value, at least one initial preset ratio value is determined; The preset speed ratio corresponding to the temperature difference value is determined from at least one of the initial preset ratio values; wherein the temperature difference value is the difference between the indoor ambient temperature and the outdoor ambient temperature, and the temperature difference value is inversely proportional to the preset speed ratio.

5. The control method for an air conditioner according to claim 1, characterized in that, After detecting the current operating mode of the air conditioner, the method further includes: If the function mode is not the windless mode, obtain the changing trend of the indoor environmental parameters and the second current value of the indoor environmental parameters; Determine the preset rotational speed corresponding to the changing trend and the second current value; The supply fan and the exhaust fan are controlled to operate at a preset speed.

6. The control method for an air conditioner according to claim 5, characterized in that, The indoor environmental parameters include the concentration of fine particulate matter in the indoor air; Determining the preset rotational speed corresponding to the changing trend and the second current value includes: If the trend of change is upward, determine the first preset rotation speed corresponding to the second current value of the fine particulate matter concentration value; If the trend of change is downward, determine the second preset rotation speed corresponding to the second current value of the fine particulate matter concentration.

7. The control method for an air conditioner according to claim 5, characterized in that, The indoor environmental parameters include the carbon dioxide concentration value of the indoor air; Determining the preset rotational speed corresponding to the changing trend and the current value includes: If the trend of change is upward, determine the first preset rotation speed corresponding to the second current value of the carbon dioxide concentration; If the trend of change is downward, determine the second preset rotation speed corresponding to the second current value of the carbon dioxide concentration.

8. A control device for an air conditioner, characterized in that, The air conditioner has a fresh air system, and the control device of the air conditioner includes: The function detection module is used to detect the current operating function mode of the air conditioner after the fresh air system is turned on; The fan control module is used to control the supply fan and exhaust fan of the fresh air system to operate at a preset speed ratio if the function mode is a windless mode; wherein the preset speed ratio is less than or equal to 1. The control device of the air conditioner is specifically used to, if the function mode is a windless mode, acquire the changing trend of the fine particulate matter concentration value in the indoor air and the first current value of the fine particulate matter concentration value; determine the preset speed ratio according to the changing trend and the first current value; wherein, the larger the first current value, the larger the value of the preset speed ratio; and control the supply fan and the exhaust fan to operate according to the preset speed ratio.

9. An air conditioner, characterized in that, include: The fresh air system includes an exhaust fan and a supply fan; The control device for an air conditioner as described in claim 8.

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